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 
24 /* adaptive dwell max budget time [TU] for full scan */
25 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300
26 /* adaptive dwell max budget time [TU] for directed scan */
27 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100
28 /* adaptive dwell default high band APs number */
29 #define IWL_SCAN_ADWELL_DEFAULT_HB_N_APS 8
30 /* adaptive dwell default low band APs number */
31 #define IWL_SCAN_ADWELL_DEFAULT_LB_N_APS 2
32 /* adaptive dwell default APs number in social channels (1, 6, 11) */
33 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
34 /* number of scan channels */
35 #define IWL_SCAN_NUM_CHANNELS 112
36 /* adaptive dwell number of APs override mask for p2p friendly GO */
37 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT BIT(20)
38 /* adaptive dwell number of APs override mask for social channels */
39 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT BIT(21)
40 /* adaptive dwell number of APs override for p2p friendly GO channels */
41 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY 10
42 /* adaptive dwell number of APs override for social channels */
43 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS 2
44 
45 /* minimal number of 2GHz and 5GHz channels in the regular scan request */
46 #define IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS 4
47 
48 struct iwl_mvm_scan_timing_params {
49 	u32 suspend_time;
50 	u32 max_out_time;
51 };
52 
53 static struct iwl_mvm_scan_timing_params scan_timing[] = {
54 	[IWL_SCAN_TYPE_UNASSOC] = {
55 		.suspend_time = 0,
56 		.max_out_time = 0,
57 	},
58 	[IWL_SCAN_TYPE_WILD] = {
59 		.suspend_time = 30,
60 		.max_out_time = 120,
61 	},
62 	[IWL_SCAN_TYPE_MILD] = {
63 		.suspend_time = 120,
64 		.max_out_time = 120,
65 	},
66 	[IWL_SCAN_TYPE_FRAGMENTED] = {
67 		.suspend_time = 95,
68 		.max_out_time = 44,
69 	},
70 	[IWL_SCAN_TYPE_FAST_BALANCE] = {
71 		.suspend_time = 30,
72 		.max_out_time = 37,
73 	},
74 };
75 
76 struct iwl_mvm_scan_params {
77 	/* For CDB this is low band scan type, for non-CDB - type. */
78 	enum iwl_mvm_scan_type type;
79 	enum iwl_mvm_scan_type hb_type;
80 	u32 n_channels;
81 	u16 delay;
82 	int n_ssids;
83 	struct cfg80211_ssid *ssids;
84 	struct ieee80211_channel **channels;
85 	u32 flags;
86 	u8 *mac_addr;
87 	u8 *mac_addr_mask;
88 	bool no_cck;
89 	bool pass_all;
90 	int n_match_sets;
91 	struct iwl_scan_probe_req preq;
92 	struct cfg80211_match_set *match_sets;
93 	int n_scan_plans;
94 	struct cfg80211_sched_scan_plan *scan_plans;
95 	bool iter_notif;
96 	struct cfg80211_scan_6ghz_params *scan_6ghz_params;
97 	u32 n_6ghz_params;
98 	bool scan_6ghz;
99 	bool enable_6ghz_passive;
100 	bool respect_p2p_go, respect_p2p_go_hb;
101 };
102 
iwl_mvm_get_scan_req_umac_data(struct iwl_mvm * mvm)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 *
iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm * mvm)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 
iwl_mvm_scan_rx_ant(struct iwl_mvm * mvm)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 
iwl_mvm_scan_rx_chain(struct iwl_mvm * mvm)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
iwl_mvm_scan_rate_n_flags(struct iwl_mvm * mvm,enum nl80211_band band,bool no_cck)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_V1 |
167 				   tx_ant);
168 	else
169 		return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
170 }
171 
iwl_mvm_get_traffic_load(struct iwl_mvm * mvm)172 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
173 {
174 	return mvm->tcm.result.global_load;
175 }
176 
177 static enum iwl_mvm_traffic_load
iwl_mvm_get_traffic_load_band(struct iwl_mvm * mvm,enum nl80211_band band)178 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band)
179 {
180 	return mvm->tcm.result.band_load[band];
181 }
182 
183 struct iwl_mvm_scan_iter_data {
184 	u32 global_cnt;
185 	struct ieee80211_vif *current_vif;
186 	bool is_dcm_with_p2p_go;
187 };
188 
iwl_mvm_scan_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)189 static void iwl_mvm_scan_iterator(void *_data, u8 *mac,
190 				  struct ieee80211_vif *vif)
191 {
192 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
193 	struct iwl_mvm_scan_iter_data *data = _data;
194 	struct iwl_mvm_vif *curr_mvmvif;
195 
196 	if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
197 	    mvmvif->phy_ctxt->id < NUM_PHY_CTX)
198 		data->global_cnt += 1;
199 
200 	if (!data->current_vif || vif == data->current_vif)
201 		return;
202 
203 	curr_mvmvif = iwl_mvm_vif_from_mac80211(data->current_vif);
204 
205 	if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
206 	    mvmvif->phy_ctxt && curr_mvmvif->phy_ctxt &&
207 	    mvmvif->phy_ctxt->id != curr_mvmvif->phy_ctxt->id)
208 		data->is_dcm_with_p2p_go = true;
209 }
210 
211 static enum
_iwl_mvm_get_scan_type(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum iwl_mvm_traffic_load load,bool low_latency)212 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
213 					 struct ieee80211_vif *vif,
214 					 enum iwl_mvm_traffic_load load,
215 					 bool low_latency)
216 {
217 	struct iwl_mvm_scan_iter_data data = {
218 		.current_vif = vif,
219 		.is_dcm_with_p2p_go = false,
220 		.global_cnt = 0,
221 	};
222 
223 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
224 						   IEEE80211_IFACE_ITER_NORMAL,
225 						   iwl_mvm_scan_iterator,
226 						   &data);
227 
228 	if (!data.global_cnt)
229 		return IWL_SCAN_TYPE_UNASSOC;
230 
231 	if (fw_has_api(&mvm->fw->ucode_capa,
232 		       IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
233 		if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
234 		    (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE))
235 			return IWL_SCAN_TYPE_FRAGMENTED;
236 
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 		    data.is_dcm_with_p2p_go)
244 			return IWL_SCAN_TYPE_FAST_BALANCE;
245 	}
246 
247 	if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
248 		return IWL_SCAN_TYPE_MILD;
249 
250 	return IWL_SCAN_TYPE_WILD;
251 }
252 
253 static enum
iwl_mvm_get_scan_type(struct iwl_mvm * mvm,struct ieee80211_vif * vif)254 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
255 					struct ieee80211_vif *vif)
256 {
257 	enum iwl_mvm_traffic_load load;
258 	bool low_latency;
259 
260 	load = iwl_mvm_get_traffic_load(mvm);
261 	low_latency = iwl_mvm_low_latency(mvm);
262 
263 	return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
264 }
265 
266 static enum
iwl_mvm_get_scan_type_band(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum nl80211_band band)267 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm,
268 					     struct ieee80211_vif *vif,
269 					     enum nl80211_band band)
270 {
271 	enum iwl_mvm_traffic_load load;
272 	bool low_latency;
273 
274 	load = iwl_mvm_get_traffic_load_band(mvm, band);
275 	low_latency = iwl_mvm_low_latency_band(mvm, band);
276 
277 	return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
278 }
279 
iwl_mvm_rrm_scan_needed(struct iwl_mvm * mvm)280 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
281 {
282 	/* require rrm scan whenever the fw supports it */
283 	return fw_has_capa(&mvm->fw->ucode_capa,
284 			   IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
285 }
286 
iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm * mvm)287 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
288 {
289 	int max_probe_len;
290 
291 	max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
292 
293 	/* we create the 802.11 header and SSID element */
294 	max_probe_len -= 24 + 2;
295 
296 	/* DS parameter set element is added on 2.4GHZ band if required */
297 	if (iwl_mvm_rrm_scan_needed(mvm))
298 		max_probe_len -= 3;
299 
300 	return max_probe_len;
301 }
302 
iwl_mvm_max_scan_ie_len(struct iwl_mvm * mvm)303 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
304 {
305 	int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
306 
307 	/* TODO: [BUG] This function should return the maximum allowed size of
308 	 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
309 	 * in the same command. So the correct implementation of this function
310 	 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
311 	 * command has only 512 bytes and it would leave us with about 240
312 	 * bytes for scan IEs, which is clearly not enough. So meanwhile
313 	 * we will report an incorrect value. This may result in a failure to
314 	 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
315 	 * functions with -ENOBUFS, if a large enough probe will be provided.
316 	 */
317 	return max_ie_len;
318 }
319 
iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)320 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
321 					      struct iwl_rx_cmd_buffer *rxb)
322 {
323 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
324 	struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
325 
326 	IWL_DEBUG_SCAN(mvm,
327 		       "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
328 		       notif->status, notif->scanned_channels);
329 
330 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
331 		IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
332 		ieee80211_sched_scan_results(mvm->hw);
333 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
334 	}
335 }
336 
iwl_mvm_rx_scan_match_found(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)337 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
338 				 struct iwl_rx_cmd_buffer *rxb)
339 {
340 	IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
341 	ieee80211_sched_scan_results(mvm->hw);
342 }
343 
iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)344 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
345 {
346 	switch (status) {
347 	case IWL_SCAN_EBS_SUCCESS:
348 		return "successful";
349 	case IWL_SCAN_EBS_INACTIVE:
350 		return "inactive";
351 	case IWL_SCAN_EBS_FAILED:
352 	case IWL_SCAN_EBS_CHAN_NOT_FOUND:
353 	default:
354 		return "failed";
355 	}
356 }
357 
iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)358 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
359 					 struct iwl_rx_cmd_buffer *rxb)
360 {
361 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
362 	struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
363 	bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
364 
365 	/* If this happens, the firmware has mistakenly sent an LMAC
366 	 * notification during UMAC scans -- warn and ignore it.
367 	 */
368 	if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
369 				     IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
370 		return;
371 
372 	/* scan status must be locked for proper checking */
373 	lockdep_assert_held(&mvm->mutex);
374 
375 	/* We first check if we were stopping a scan, in which case we
376 	 * just clear the stopping flag.  Then we check if it was a
377 	 * firmware initiated stop, in which case we need to inform
378 	 * mac80211.
379 	 * Note that we can have a stopping and a running scan
380 	 * simultaneously, but we can't have two different types of
381 	 * scans stopping or running at the same time (since LMAC
382 	 * doesn't support it).
383 	 */
384 
385 	if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
386 		WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
387 
388 		IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
389 			       aborted ? "aborted" : "completed",
390 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
391 		IWL_DEBUG_SCAN(mvm,
392 			       "Last line %d, Last iteration %d, Time after last iteration %d\n",
393 			       scan_notif->last_schedule_line,
394 			       scan_notif->last_schedule_iteration,
395 			       __le32_to_cpu(scan_notif->time_after_last_iter));
396 
397 		mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
398 	} else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
399 		IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
400 			       aborted ? "aborted" : "completed",
401 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
402 
403 		mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
404 	} else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
405 		WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
406 
407 		IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
408 			       aborted ? "aborted" : "completed",
409 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
410 		IWL_DEBUG_SCAN(mvm,
411 			       "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
412 			       scan_notif->last_schedule_line,
413 			       scan_notif->last_schedule_iteration,
414 			       __le32_to_cpu(scan_notif->time_after_last_iter));
415 
416 		mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
417 		ieee80211_sched_scan_stopped(mvm->hw);
418 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
419 	} else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
420 		struct cfg80211_scan_info info = {
421 			.aborted = aborted,
422 		};
423 
424 		IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
425 			       aborted ? "aborted" : "completed",
426 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
427 
428 		mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
429 		ieee80211_scan_completed(mvm->hw, &info);
430 		cancel_delayed_work(&mvm->scan_timeout_dwork);
431 		iwl_mvm_resume_tcm(mvm);
432 	} else {
433 		IWL_ERR(mvm,
434 			"got scan complete notification but no scan is running\n");
435 	}
436 
437 	mvm->last_ebs_successful =
438 			scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
439 			scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
440 }
441 
iwl_ssid_exist(u8 * ssid,u8 ssid_len,struct iwl_ssid_ie * ssid_list)442 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
443 {
444 	int i;
445 
446 	for (i = 0; i < PROBE_OPTION_MAX; i++) {
447 		if (!ssid_list[i].len)
448 			break;
449 		if (ssid_list[i].len == ssid_len &&
450 		    !memcmp(ssid_list->ssid, ssid, ssid_len))
451 			return i;
452 	}
453 	return -1;
454 }
455 
456 /* We insert the SSIDs in an inverted order, because the FW will
457  * invert it back.
458  */
iwl_scan_build_ssids(struct iwl_mvm_scan_params * params,struct iwl_ssid_ie * ssids,u32 * ssid_bitmap)459 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
460 				 struct iwl_ssid_ie *ssids,
461 				 u32 *ssid_bitmap)
462 {
463 	int i, j;
464 	int index;
465 	u32 tmp_bitmap = 0;
466 
467 	/*
468 	 * copy SSIDs from match list.
469 	 * iwl_config_sched_scan_profiles() uses the order of these ssids to
470 	 * config match list.
471 	 */
472 	for (i = 0, j = params->n_match_sets - 1;
473 	     j >= 0 && i < PROBE_OPTION_MAX;
474 	     i++, j--) {
475 		/* skip empty SSID matchsets */
476 		if (!params->match_sets[j].ssid.ssid_len)
477 			continue;
478 		ssids[i].id = WLAN_EID_SSID;
479 		ssids[i].len = params->match_sets[j].ssid.ssid_len;
480 		memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
481 		       ssids[i].len);
482 	}
483 
484 	/* add SSIDs from scan SSID list */
485 	for (j = params->n_ssids - 1;
486 	     j >= 0 && i < PROBE_OPTION_MAX;
487 	     i++, j--) {
488 		index = iwl_ssid_exist(params->ssids[j].ssid,
489 				       params->ssids[j].ssid_len,
490 				       ssids);
491 		if (index < 0) {
492 			ssids[i].id = WLAN_EID_SSID;
493 			ssids[i].len = params->ssids[j].ssid_len;
494 			memcpy(ssids[i].ssid, params->ssids[j].ssid,
495 			       ssids[i].len);
496 			tmp_bitmap |= BIT(i);
497 		} else {
498 			tmp_bitmap |= BIT(index);
499 		}
500 	}
501 	if (ssid_bitmap)
502 		*ssid_bitmap = tmp_bitmap;
503 }
504 
505 static int
iwl_mvm_config_sched_scan_profiles(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)506 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
507 				   struct cfg80211_sched_scan_request *req)
508 {
509 	struct iwl_scan_offload_profile *profile;
510 	struct iwl_scan_offload_profile_cfg_v1 *profile_cfg_v1;
511 	struct iwl_scan_offload_blocklist *blocklist;
512 	struct iwl_scan_offload_profile_cfg_data *data;
513 	int max_profiles = iwl_umac_scan_get_max_profiles(mvm->fw);
514 	int profile_cfg_size = sizeof(*data) +
515 		sizeof(*profile) * max_profiles;
516 	struct iwl_host_cmd cmd = {
517 		.id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
518 		.len[1] = profile_cfg_size,
519 		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
520 		.dataflags[1] = IWL_HCMD_DFL_NOCOPY,
521 	};
522 	int blocklist_len;
523 	int i;
524 	int ret;
525 
526 	if (WARN_ON(req->n_match_sets > max_profiles))
527 		return -EIO;
528 
529 	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
530 		blocklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
531 	else
532 		blocklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
533 
534 	blocklist = kcalloc(blocklist_len, sizeof(*blocklist), GFP_KERNEL);
535 	if (!blocklist)
536 		return -ENOMEM;
537 
538 	profile_cfg_v1 = kzalloc(profile_cfg_size, GFP_KERNEL);
539 	if (!profile_cfg_v1) {
540 		ret = -ENOMEM;
541 		goto free_blocklist;
542 	}
543 
544 	cmd.data[0] = blocklist;
545 	cmd.len[0] = sizeof(*blocklist) * blocklist_len;
546 	cmd.data[1] = profile_cfg_v1;
547 
548 	/* if max_profile is MAX_PROFILES_V2, we have the new API */
549 	if (max_profiles == IWL_SCAN_MAX_PROFILES_V2) {
550 		struct iwl_scan_offload_profile_cfg *profile_cfg =
551 			(struct iwl_scan_offload_profile_cfg *)profile_cfg_v1;
552 
553 		data = &profile_cfg->data;
554 	} else {
555 		data = &profile_cfg_v1->data;
556 	}
557 
558 	/* No blocklist configuration */
559 	data->num_profiles = req->n_match_sets;
560 	data->active_clients = SCAN_CLIENT_SCHED_SCAN;
561 	data->pass_match = SCAN_CLIENT_SCHED_SCAN;
562 	data->match_notify = SCAN_CLIENT_SCHED_SCAN;
563 
564 	if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
565 		data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
566 
567 	for (i = 0; i < req->n_match_sets; i++) {
568 		profile = &profile_cfg_v1->profiles[i];
569 		profile->ssid_index = i;
570 		/* Support any cipher and auth algorithm */
571 		profile->unicast_cipher = 0xff;
572 		profile->auth_alg = IWL_AUTH_ALGO_UNSUPPORTED |
573 			IWL_AUTH_ALGO_NONE | IWL_AUTH_ALGO_PSK | IWL_AUTH_ALGO_8021X |
574 			IWL_AUTH_ALGO_SAE | IWL_AUTH_ALGO_8021X_SHA384 | IWL_AUTH_ALGO_OWE;
575 		profile->network_type = IWL_NETWORK_TYPE_ANY;
576 		profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
577 		profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
578 	}
579 
580 	IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
581 
582 	ret = iwl_mvm_send_cmd(mvm, &cmd);
583 	kfree(profile_cfg_v1);
584 free_blocklist:
585 	kfree(blocklist);
586 
587 	return ret;
588 }
589 
iwl_mvm_scan_pass_all(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)590 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
591 				  struct cfg80211_sched_scan_request *req)
592 {
593 	if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
594 		IWL_DEBUG_SCAN(mvm,
595 			       "Sending scheduled scan with filtering, n_match_sets %d\n",
596 			       req->n_match_sets);
597 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
598 		return false;
599 	}
600 
601 	IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
602 
603 	mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
604 	return true;
605 }
606 
iwl_mvm_lmac_scan_abort(struct iwl_mvm * mvm)607 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
608 {
609 	int ret;
610 	struct iwl_host_cmd cmd = {
611 		.id = SCAN_OFFLOAD_ABORT_CMD,
612 	};
613 	u32 status = CAN_ABORT_STATUS;
614 
615 	ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
616 	if (ret)
617 		return ret;
618 
619 	if (status != CAN_ABORT_STATUS) {
620 		/*
621 		 * The scan abort will return 1 for success or
622 		 * 2 for "failure".  A failure condition can be
623 		 * due to simply not being in an active scan which
624 		 * can occur if we send the scan abort before the
625 		 * microcode has notified us that a scan is completed.
626 		 */
627 		IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
628 		ret = -ENOENT;
629 	}
630 
631 	return ret;
632 }
633 
iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm * mvm,struct iwl_scan_req_tx_cmd * tx_cmd,bool no_cck)634 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
635 				     struct iwl_scan_req_tx_cmd *tx_cmd,
636 				     bool no_cck)
637 {
638 	tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
639 					 TX_CMD_FLG_BT_DIS);
640 	tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
641 							   NL80211_BAND_2GHZ,
642 							   no_cck);
643 
644 	if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) < 12) {
645 		tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
646 		tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
647 
648 	/*
649 	 * Fw doesn't use this sta anymore, pending deprecation via HOST API
650 	 * change
651 	 */
652 	} else {
653 		tx_cmd[0].sta_id = 0xff;
654 		tx_cmd[1].sta_id = 0xff;
655 	}
656 
657 	tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
658 					 TX_CMD_FLG_BT_DIS);
659 
660 	tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
661 							   NL80211_BAND_5GHZ,
662 							   no_cck);
663 }
664 
665 static void
iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm * mvm,struct ieee80211_channel ** channels,int n_channels,u32 ssid_bitmap,struct iwl_scan_req_lmac * cmd)666 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
667 			       struct ieee80211_channel **channels,
668 			       int n_channels, u32 ssid_bitmap,
669 			       struct iwl_scan_req_lmac *cmd)
670 {
671 	struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
672 	int i;
673 
674 	for (i = 0; i < n_channels; i++) {
675 		channel_cfg[i].channel_num =
676 			cpu_to_le16(channels[i]->hw_value);
677 		channel_cfg[i].iter_count = cpu_to_le16(1);
678 		channel_cfg[i].iter_interval = 0;
679 		channel_cfg[i].flags =
680 			cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
681 				    ssid_bitmap);
682 	}
683 }
684 
iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm * mvm,const u8 * ies,size_t len,u8 * const pos)685 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
686 					   size_t len, u8 *const pos)
687 {
688 	static const u8 before_ds_params[] = {
689 			WLAN_EID_SSID,
690 			WLAN_EID_SUPP_RATES,
691 			WLAN_EID_REQUEST,
692 			WLAN_EID_EXT_SUPP_RATES,
693 	};
694 	size_t offs;
695 	u8 *newpos = pos;
696 
697 	if (!iwl_mvm_rrm_scan_needed(mvm)) {
698 		memcpy(newpos, ies, len);
699 		return newpos + len;
700 	}
701 
702 	offs = ieee80211_ie_split(ies, len,
703 				  before_ds_params,
704 				  ARRAY_SIZE(before_ds_params),
705 				  0);
706 
707 	memcpy(newpos, ies, offs);
708 	newpos += offs;
709 
710 	/* Add a placeholder for DS Parameter Set element */
711 	*newpos++ = WLAN_EID_DS_PARAMS;
712 	*newpos++ = 1;
713 	*newpos++ = 0;
714 
715 	memcpy(newpos, ies + offs, len - offs);
716 	newpos += len - offs;
717 
718 	return newpos;
719 }
720 
721 #define WFA_TPC_IE_LEN	9
722 
iwl_mvm_add_tpc_report_ie(u8 * pos)723 static void iwl_mvm_add_tpc_report_ie(u8 *pos)
724 {
725 	pos[0] = WLAN_EID_VENDOR_SPECIFIC;
726 	pos[1] = WFA_TPC_IE_LEN - 2;
727 	pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
728 	pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
729 	pos[4] = WLAN_OUI_MICROSOFT & 0xff;
730 	pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
731 	pos[6] = 0;
732 	/* pos[7] - tx power will be inserted by the FW */
733 	pos[7] = 0;
734 	pos[8] = 0;
735 }
736 
737 static void
iwl_mvm_build_scan_probe(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct ieee80211_scan_ies * ies,struct iwl_mvm_scan_params * params)738 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
739 			 struct ieee80211_scan_ies *ies,
740 			 struct iwl_mvm_scan_params *params)
741 {
742 	struct ieee80211_mgmt *frame = (void *)params->preq.buf;
743 	u8 *pos, *newpos;
744 	const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
745 		params->mac_addr : NULL;
746 
747 	/*
748 	 * Unfortunately, right now the offload scan doesn't support randomising
749 	 * within the firmware, so until the firmware API is ready we implement
750 	 * it in the driver. This means that the scan iterations won't really be
751 	 * random, only when it's restarted, but at least that helps a bit.
752 	 */
753 	if (mac_addr)
754 		get_random_mask_addr(frame->sa, mac_addr,
755 				     params->mac_addr_mask);
756 	else
757 		memcpy(frame->sa, vif->addr, ETH_ALEN);
758 
759 	frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
760 	eth_broadcast_addr(frame->da);
761 	eth_broadcast_addr(frame->bssid);
762 	frame->seq_ctrl = 0;
763 
764 	pos = frame->u.probe_req.variable;
765 	*pos++ = WLAN_EID_SSID;
766 	*pos++ = 0;
767 
768 	params->preq.mac_header.offset = 0;
769 	params->preq.mac_header.len = cpu_to_le16(24 + 2);
770 
771 	/* Insert ds parameter set element on 2.4 GHz band */
772 	newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
773 						 ies->ies[NL80211_BAND_2GHZ],
774 						 ies->len[NL80211_BAND_2GHZ],
775 						 pos);
776 	params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
777 	params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
778 	pos = newpos;
779 
780 	memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
781 	       ies->len[NL80211_BAND_5GHZ]);
782 	params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
783 	params->preq.band_data[1].len =
784 		cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
785 	pos += ies->len[NL80211_BAND_5GHZ];
786 
787 	memcpy(pos, ies->ies[NL80211_BAND_6GHZ],
788 	       ies->len[NL80211_BAND_6GHZ]);
789 	params->preq.band_data[2].offset = cpu_to_le16(pos - params->preq.buf);
790 	params->preq.band_data[2].len =
791 		cpu_to_le16(ies->len[NL80211_BAND_6GHZ]);
792 	pos += ies->len[NL80211_BAND_6GHZ];
793 	memcpy(pos, ies->common_ies, ies->common_ie_len);
794 	params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
795 
796 	if (iwl_mvm_rrm_scan_needed(mvm) &&
797 	    !fw_has_capa(&mvm->fw->ucode_capa,
798 			 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
799 		iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
800 		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
801 							   WFA_TPC_IE_LEN);
802 	} else {
803 		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
804 	}
805 }
806 
iwl_mvm_scan_lmac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_lmac * cmd,struct iwl_mvm_scan_params * params)807 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
808 				    struct iwl_scan_req_lmac *cmd,
809 				    struct iwl_mvm_scan_params *params)
810 {
811 	cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
812 	cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
813 	cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
814 	cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
815 	cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
816 	cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
817 	cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
818 }
819 
iwl_mvm_scan_fits(struct iwl_mvm * mvm,int n_ssids,struct ieee80211_scan_ies * ies,int n_channels)820 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
821 				     struct ieee80211_scan_ies *ies,
822 				     int n_channels)
823 {
824 	return ((n_ssids <= PROBE_OPTION_MAX) &&
825 		(n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
826 		(ies->common_ie_len +
827 		 ies->len[NL80211_BAND_2GHZ] +
828 		 ies->len[NL80211_BAND_5GHZ] <=
829 		 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
830 }
831 
iwl_mvm_scan_use_ebs(struct iwl_mvm * mvm,struct ieee80211_vif * vif)832 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
833 					struct ieee80211_vif *vif)
834 {
835 	const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
836 	bool low_latency;
837 
838 	if (iwl_mvm_is_cdb_supported(mvm))
839 		low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ);
840 	else
841 		low_latency = iwl_mvm_low_latency(mvm);
842 
843 	/* We can only use EBS if:
844 	 *	1. the feature is supported;
845 	 *	2. the last EBS was successful;
846 	 *	3. if only single scan, the single scan EBS API is supported;
847 	 *	4. it's not a p2p find operation.
848 	 *	5. we are not in low latency mode,
849 	 *	   or if fragmented ebs is supported by the FW
850 	 */
851 	return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
852 		mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
853 		vif->type != NL80211_IFTYPE_P2P_DEVICE &&
854 		(!low_latency || iwl_mvm_is_frag_ebs_supported(mvm)));
855 }
856 
iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params * params)857 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
858 {
859 	return params->n_scan_plans == 1 &&
860 		params->scan_plans[0].iterations == 1;
861 }
862 
iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)863 static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)
864 {
865 	return (type == IWL_SCAN_TYPE_FRAGMENTED ||
866 		type == IWL_SCAN_TYPE_FAST_BALANCE);
867 }
868 
iwl_mvm_scan_lmac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)869 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
870 				   struct iwl_mvm_scan_params *params,
871 				   struct ieee80211_vif *vif)
872 {
873 	int flags = 0;
874 
875 	if (params->n_ssids == 0)
876 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
877 
878 	if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
879 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
880 
881 	if (iwl_mvm_is_scan_fragmented(params->type))
882 		flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
883 
884 	if (iwl_mvm_rrm_scan_needed(mvm) &&
885 	    fw_has_capa(&mvm->fw->ucode_capa,
886 			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
887 		flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
888 
889 	if (params->pass_all)
890 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
891 	else
892 		flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
893 
894 #ifdef CONFIG_IWLWIFI_DEBUGFS
895 	if (mvm->scan_iter_notif_enabled)
896 		flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
897 #endif
898 
899 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
900 		flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
901 
902 	if (iwl_mvm_is_regular_scan(params) &&
903 	    vif->type != NL80211_IFTYPE_P2P_DEVICE &&
904 	    !iwl_mvm_is_scan_fragmented(params->type))
905 		flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
906 
907 	return flags;
908 }
909 
910 static void
iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 * p_req,struct iwl_scan_probe_req * src_p_req)911 iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req,
912 				  struct iwl_scan_probe_req *src_p_req)
913 {
914 	int i;
915 
916 	p_req->mac_header = src_p_req->mac_header;
917 	for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++)
918 		p_req->band_data[i] = src_p_req->band_data[i];
919 	p_req->common_data = src_p_req->common_data;
920 	memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf));
921 }
922 
iwl_mvm_scan_lmac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params)923 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
924 			     struct iwl_mvm_scan_params *params)
925 {
926 	struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
927 	struct iwl_scan_probe_req_v1 *preq =
928 		(void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
929 			 mvm->fw->ucode_capa.n_scan_channels);
930 	u32 ssid_bitmap = 0;
931 	int i;
932 	u8 band;
933 
934 	if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
935 		return -EINVAL;
936 
937 	iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
938 
939 	cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
940 	cmd->iter_num = cpu_to_le32(1);
941 	cmd->n_channels = (u8)params->n_channels;
942 
943 	cmd->delay = cpu_to_le32(params->delay);
944 
945 	cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
946 							      vif));
947 
948 	band = iwl_mvm_phy_band_from_nl80211(params->channels[0]->band);
949 	cmd->flags = cpu_to_le32(band);
950 	cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
951 					MAC_FILTER_IN_BEACON);
952 	iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
953 	iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
954 
955 	/* this API uses bits 1-20 instead of 0-19 */
956 	ssid_bitmap <<= 1;
957 
958 	for (i = 0; i < params->n_scan_plans; i++) {
959 		struct cfg80211_sched_scan_plan *scan_plan =
960 			&params->scan_plans[i];
961 
962 		cmd->schedule[i].delay =
963 			cpu_to_le16(scan_plan->interval);
964 		cmd->schedule[i].iterations = scan_plan->iterations;
965 		cmd->schedule[i].full_scan_mul = 1;
966 	}
967 
968 	/*
969 	 * If the number of iterations of the last scan plan is set to
970 	 * zero, it should run infinitely. However, this is not always the case.
971 	 * For example, when regular scan is requested the driver sets one scan
972 	 * plan with one iteration.
973 	 */
974 	if (!cmd->schedule[i - 1].iterations)
975 		cmd->schedule[i - 1].iterations = 0xff;
976 
977 	if (iwl_mvm_scan_use_ebs(mvm, vif)) {
978 		cmd->channel_opt[0].flags =
979 			cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
980 				    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
981 				    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
982 		cmd->channel_opt[0].non_ebs_ratio =
983 			cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
984 		cmd->channel_opt[1].flags =
985 			cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
986 				    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
987 				    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
988 		cmd->channel_opt[1].non_ebs_ratio =
989 			cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
990 	}
991 
992 	iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
993 				       params->n_channels, ssid_bitmap, cmd);
994 
995 	iwl_mvm_scan_set_legacy_probe_req(preq, &params->preq);
996 
997 	return 0;
998 }
999 
rate_to_scan_rate_flag(unsigned int rate)1000 static int rate_to_scan_rate_flag(unsigned int rate)
1001 {
1002 	static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1003 		[IWL_RATE_1M_INDEX]	= SCAN_CONFIG_RATE_1M,
1004 		[IWL_RATE_2M_INDEX]	= SCAN_CONFIG_RATE_2M,
1005 		[IWL_RATE_5M_INDEX]	= SCAN_CONFIG_RATE_5M,
1006 		[IWL_RATE_11M_INDEX]	= SCAN_CONFIG_RATE_11M,
1007 		[IWL_RATE_6M_INDEX]	= SCAN_CONFIG_RATE_6M,
1008 		[IWL_RATE_9M_INDEX]	= SCAN_CONFIG_RATE_9M,
1009 		[IWL_RATE_12M_INDEX]	= SCAN_CONFIG_RATE_12M,
1010 		[IWL_RATE_18M_INDEX]	= SCAN_CONFIG_RATE_18M,
1011 		[IWL_RATE_24M_INDEX]	= SCAN_CONFIG_RATE_24M,
1012 		[IWL_RATE_36M_INDEX]	= SCAN_CONFIG_RATE_36M,
1013 		[IWL_RATE_48M_INDEX]	= SCAN_CONFIG_RATE_48M,
1014 		[IWL_RATE_54M_INDEX]	= SCAN_CONFIG_RATE_54M,
1015 	};
1016 
1017 	return rate_to_scan_rate[rate];
1018 }
1019 
iwl_mvm_scan_config_rates(struct iwl_mvm * mvm)1020 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1021 {
1022 	struct ieee80211_supported_band *band;
1023 	unsigned int rates = 0;
1024 	int i;
1025 
1026 	band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1027 	for (i = 0; i < band->n_bitrates; i++)
1028 		rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1029 	band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1030 	for (i = 0; i < band->n_bitrates; i++)
1031 		rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1032 
1033 	/* Set both basic rates and supported rates */
1034 	rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1035 
1036 	return cpu_to_le32(rates);
1037 }
1038 
iwl_mvm_fill_scan_dwell(struct iwl_mvm * mvm,struct iwl_scan_dwell * dwell)1039 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
1040 				    struct iwl_scan_dwell *dwell)
1041 {
1042 	dwell->active = IWL_SCAN_DWELL_ACTIVE;
1043 	dwell->passive = IWL_SCAN_DWELL_PASSIVE;
1044 	dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
1045 	dwell->extended = IWL_SCAN_DWELL_EXTENDED;
1046 }
1047 
iwl_mvm_fill_channels(struct iwl_mvm * mvm,u8 * channels,u32 max_channels)1048 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels,
1049 				  u32 max_channels)
1050 {
1051 	struct ieee80211_supported_band *band;
1052 	int i, j = 0;
1053 
1054 	band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1055 	for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1056 		channels[j] = band->channels[i].hw_value;
1057 	band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1058 	for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1059 		channels[j] = band->channels[i].hw_value;
1060 }
1061 
iwl_mvm_fill_scan_config_v1(struct iwl_mvm * mvm,void * config,u32 flags,u8 channel_flags,u32 max_channels)1062 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
1063 					u32 flags, u8 channel_flags,
1064 					u32 max_channels)
1065 {
1066 	enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL);
1067 	struct iwl_scan_config_v1 *cfg = config;
1068 
1069 	cfg->flags = cpu_to_le32(flags);
1070 	cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1071 	cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1072 	cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1073 	cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
1074 	cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
1075 
1076 	iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1077 
1078 	memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1079 
1080 	/* This function should not be called when using ADD_STA ver >=12 */
1081 	WARN_ON_ONCE(iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12);
1082 
1083 	cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1084 	cfg->channel_flags = channel_flags;
1085 
1086 	iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1087 }
1088 
iwl_mvm_fill_scan_config_v2(struct iwl_mvm * mvm,void * config,u32 flags,u8 channel_flags,u32 max_channels)1089 static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config,
1090 					u32 flags, u8 channel_flags,
1091 					u32 max_channels)
1092 {
1093 	struct iwl_scan_config_v2 *cfg = config;
1094 
1095 	cfg->flags = cpu_to_le32(flags);
1096 	cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1097 	cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1098 	cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1099 
1100 	if (iwl_mvm_is_cdb_supported(mvm)) {
1101 		enum iwl_mvm_scan_type lb_type, hb_type;
1102 
1103 		lb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1104 						     NL80211_BAND_2GHZ);
1105 		hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1106 						     NL80211_BAND_5GHZ);
1107 
1108 		cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1109 			cpu_to_le32(scan_timing[lb_type].max_out_time);
1110 		cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1111 			cpu_to_le32(scan_timing[lb_type].suspend_time);
1112 
1113 		cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] =
1114 			cpu_to_le32(scan_timing[hb_type].max_out_time);
1115 		cfg->suspend_time[SCAN_HB_LMAC_IDX] =
1116 			cpu_to_le32(scan_timing[hb_type].suspend_time);
1117 	} else {
1118 		enum iwl_mvm_scan_type type =
1119 			iwl_mvm_get_scan_type(mvm, NULL);
1120 
1121 		cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1122 			cpu_to_le32(scan_timing[type].max_out_time);
1123 		cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1124 			cpu_to_le32(scan_timing[type].suspend_time);
1125 	}
1126 
1127 	iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1128 
1129 	memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1130 
1131 	/* This function should not be called when using ADD_STA ver >=12 */
1132 	WARN_ON_ONCE(iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) >= 12);
1133 
1134 	cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1135 	cfg->channel_flags = channel_flags;
1136 
1137 	iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1138 }
1139 
iwl_mvm_legacy_config_scan(struct iwl_mvm * mvm)1140 static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
1141 {
1142 	void *cfg;
1143 	int ret, cmd_size;
1144 	struct iwl_host_cmd cmd = {
1145 		.id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1146 	};
1147 	enum iwl_mvm_scan_type type;
1148 	enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET;
1149 	int num_channels =
1150 		mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1151 		mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1152 	u32 flags;
1153 	u8 channel_flags;
1154 
1155 	if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1156 		num_channels = mvm->fw->ucode_capa.n_scan_channels;
1157 
1158 	if (iwl_mvm_is_cdb_supported(mvm)) {
1159 		type = iwl_mvm_get_scan_type_band(mvm, NULL,
1160 						  NL80211_BAND_2GHZ);
1161 		hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1162 						     NL80211_BAND_5GHZ);
1163 		if (type == mvm->scan_type && hb_type == mvm->hb_scan_type)
1164 			return 0;
1165 	} else {
1166 		type = iwl_mvm_get_scan_type(mvm, NULL);
1167 		if (type == mvm->scan_type)
1168 			return 0;
1169 	}
1170 
1171 	if (iwl_mvm_cdb_scan_api(mvm))
1172 		cmd_size = sizeof(struct iwl_scan_config_v2);
1173 	else
1174 		cmd_size = sizeof(struct iwl_scan_config_v1);
1175 	cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1176 
1177 	cfg = kzalloc(cmd_size, GFP_KERNEL);
1178 	if (!cfg)
1179 		return -ENOMEM;
1180 
1181 	flags = SCAN_CONFIG_FLAG_ACTIVATE |
1182 		 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1183 		 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1184 		 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1185 		 SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1186 		 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1187 		 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1188 		 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1189 		 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1190 		 SCAN_CONFIG_N_CHANNELS(num_channels) |
1191 		 (iwl_mvm_is_scan_fragmented(type) ?
1192 		  SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1193 		  SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1194 
1195 	channel_flags = IWL_CHANNEL_FLAG_EBS |
1196 			IWL_CHANNEL_FLAG_ACCURATE_EBS |
1197 			IWL_CHANNEL_FLAG_EBS_ADD |
1198 			IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1199 
1200 	/*
1201 	 * Check for fragmented scan on LMAC2 - high band.
1202 	 * LMAC1 - low band is checked above.
1203 	 */
1204 	if (iwl_mvm_cdb_scan_api(mvm)) {
1205 		if (iwl_mvm_is_cdb_supported(mvm))
1206 			flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ?
1207 				 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1208 				 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1209 		iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags,
1210 					    num_channels);
1211 	} else {
1212 		iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags,
1213 					    num_channels);
1214 	}
1215 
1216 	cmd.data[0] = cfg;
1217 	cmd.len[0] = cmd_size;
1218 	cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1219 
1220 	IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1221 
1222 	ret = iwl_mvm_send_cmd(mvm, &cmd);
1223 	if (!ret) {
1224 		mvm->scan_type = type;
1225 		mvm->hb_scan_type = hb_type;
1226 	}
1227 
1228 	kfree(cfg);
1229 	return ret;
1230 }
1231 
iwl_mvm_config_scan(struct iwl_mvm * mvm)1232 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1233 {
1234 	struct iwl_scan_config cfg;
1235 	struct iwl_host_cmd cmd = {
1236 		.id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1237 		.len[0] = sizeof(cfg),
1238 		.data[0] = &cfg,
1239 		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1240 	};
1241 
1242 	if (!iwl_mvm_is_reduced_config_scan_supported(mvm))
1243 		return iwl_mvm_legacy_config_scan(mvm);
1244 
1245 	memset(&cfg, 0, sizeof(cfg));
1246 
1247 	if (iwl_fw_lookup_cmd_ver(mvm->fw, ADD_STA, 0) < 12) {
1248 		cfg.bcast_sta_id = mvm->aux_sta.sta_id;
1249 	} else if (iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_CFG_CMD, 0) < 5) {
1250 		/*
1251 		 * Fw doesn't use this sta anymore. Deprecated on SCAN_CFG_CMD
1252 		 * version 5.
1253 		 */
1254 		cfg.bcast_sta_id = 0xff;
1255 	}
1256 
1257 	cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1258 	cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1259 
1260 	IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1261 
1262 	return iwl_mvm_send_cmd(mvm, &cmd);
1263 }
1264 
iwl_mvm_scan_uid_by_status(struct iwl_mvm * mvm,int status)1265 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1266 {
1267 	int i;
1268 
1269 	for (i = 0; i < mvm->max_scans; i++)
1270 		if (mvm->scan_uid_status[i] == status)
1271 			return i;
1272 
1273 	return -ENOENT;
1274 }
1275 
iwl_mvm_scan_umac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_umac * cmd,struct iwl_mvm_scan_params * params)1276 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1277 				    struct iwl_scan_req_umac *cmd,
1278 				    struct iwl_mvm_scan_params *params)
1279 {
1280 	struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1281 	u8 active_dwell, passive_dwell;
1282 
1283 	timing = &scan_timing[params->type];
1284 	active_dwell = IWL_SCAN_DWELL_ACTIVE;
1285 	passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1286 
1287 	if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1288 		cmd->v7.adwell_default_n_aps_social =
1289 			IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1290 		cmd->v7.adwell_default_n_aps =
1291 			IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1292 
1293 		if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm))
1294 			cmd->v9.adwell_default_hb_n_aps =
1295 				IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1296 
1297 		/* if custom max budget was configured with debugfs */
1298 		if (IWL_MVM_ADWELL_MAX_BUDGET)
1299 			cmd->v7.adwell_max_budget =
1300 				cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1301 		else if (params->ssids && params->ssids[0].ssid_len)
1302 			cmd->v7.adwell_max_budget =
1303 				cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1304 		else
1305 			cmd->v7.adwell_max_budget =
1306 				cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1307 
1308 		cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1309 		cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1310 			cpu_to_le32(timing->max_out_time);
1311 		cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1312 			cpu_to_le32(timing->suspend_time);
1313 
1314 		if (iwl_mvm_is_cdb_supported(mvm)) {
1315 			hb_timing = &scan_timing[params->hb_type];
1316 
1317 			cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1318 				cpu_to_le32(hb_timing->max_out_time);
1319 			cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1320 				cpu_to_le32(hb_timing->suspend_time);
1321 		}
1322 
1323 		if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1324 			cmd->v7.active_dwell = active_dwell;
1325 			cmd->v7.passive_dwell = passive_dwell;
1326 			cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1327 		} else {
1328 			cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1329 			cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1330 			if (iwl_mvm_is_cdb_supported(mvm)) {
1331 				cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
1332 					active_dwell;
1333 				cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
1334 					passive_dwell;
1335 			}
1336 		}
1337 	} else {
1338 		cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED;
1339 		cmd->v1.active_dwell = active_dwell;
1340 		cmd->v1.passive_dwell = passive_dwell;
1341 		cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1342 
1343 		if (iwl_mvm_is_cdb_supported(mvm)) {
1344 			hb_timing = &scan_timing[params->hb_type];
1345 
1346 			cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1347 					cpu_to_le32(hb_timing->max_out_time);
1348 			cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1349 					cpu_to_le32(hb_timing->suspend_time);
1350 		}
1351 
1352 		if (iwl_mvm_cdb_scan_api(mvm)) {
1353 			cmd->v6.scan_priority =
1354 				cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1355 			cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1356 				cpu_to_le32(timing->max_out_time);
1357 			cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1358 				cpu_to_le32(timing->suspend_time);
1359 		} else {
1360 			cmd->v1.scan_priority =
1361 				cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1362 			cmd->v1.max_out_time =
1363 				cpu_to_le32(timing->max_out_time);
1364 			cmd->v1.suspend_time =
1365 				cpu_to_le32(timing->suspend_time);
1366 		}
1367 	}
1368 
1369 	if (iwl_mvm_is_regular_scan(params))
1370 		cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1371 	else
1372 		cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1373 }
1374 
iwl_mvm_scan_umac_ooc_priority(struct iwl_mvm_scan_params * params)1375 static u32 iwl_mvm_scan_umac_ooc_priority(struct iwl_mvm_scan_params *params)
1376 {
1377 	return iwl_mvm_is_regular_scan(params) ?
1378 		IWL_SCAN_PRIORITY_EXT_6 :
1379 		IWL_SCAN_PRIORITY_EXT_2;
1380 }
1381 
1382 static void
iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm * mvm,struct iwl_scan_general_params_v11 * general_params,struct iwl_mvm_scan_params * params)1383 iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm *mvm,
1384 			    struct iwl_scan_general_params_v11 *general_params,
1385 			    struct iwl_mvm_scan_params *params)
1386 {
1387 	struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1388 	u8 active_dwell, passive_dwell;
1389 
1390 	timing = &scan_timing[params->type];
1391 	active_dwell = IWL_SCAN_DWELL_ACTIVE;
1392 	passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1393 
1394 	general_params->adwell_default_social_chn =
1395 		IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1396 	general_params->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1397 	general_params->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1398 
1399 	/* if custom max budget was configured with debugfs */
1400 	if (IWL_MVM_ADWELL_MAX_BUDGET)
1401 		general_params->adwell_max_budget =
1402 			cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1403 	else if (params->ssids && params->ssids[0].ssid_len)
1404 		general_params->adwell_max_budget =
1405 			cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1406 	else
1407 		general_params->adwell_max_budget =
1408 			cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1409 
1410 	general_params->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1411 	general_params->max_out_of_time[SCAN_LB_LMAC_IDX] =
1412 		cpu_to_le32(timing->max_out_time);
1413 	general_params->suspend_time[SCAN_LB_LMAC_IDX] =
1414 		cpu_to_le32(timing->suspend_time);
1415 
1416 	hb_timing = &scan_timing[params->hb_type];
1417 
1418 	general_params->max_out_of_time[SCAN_HB_LMAC_IDX] =
1419 		cpu_to_le32(hb_timing->max_out_time);
1420 	general_params->suspend_time[SCAN_HB_LMAC_IDX] =
1421 		cpu_to_le32(hb_timing->suspend_time);
1422 
1423 	general_params->active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1424 	general_params->passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1425 	general_params->active_dwell[SCAN_HB_LMAC_IDX] = active_dwell;
1426 	general_params->passive_dwell[SCAN_HB_LMAC_IDX] = passive_dwell;
1427 }
1428 
1429 struct iwl_mvm_scan_channel_segment {
1430 	u8 start_idx;
1431 	u8 end_idx;
1432 	u8 first_channel_id;
1433 	u8 last_channel_id;
1434 	u8 channel_spacing_shift;
1435 	u8 band;
1436 };
1437 
1438 static const struct iwl_mvm_scan_channel_segment scan_channel_segments[] = {
1439 	{
1440 		.start_idx = 0,
1441 		.end_idx = 13,
1442 		.first_channel_id = 1,
1443 		.last_channel_id = 14,
1444 		.channel_spacing_shift = 0,
1445 		.band = PHY_BAND_24
1446 	},
1447 	{
1448 		.start_idx = 14,
1449 		.end_idx = 41,
1450 		.first_channel_id = 36,
1451 		.last_channel_id = 144,
1452 		.channel_spacing_shift = 2,
1453 		.band = PHY_BAND_5
1454 	},
1455 	{
1456 		.start_idx = 42,
1457 		.end_idx = 50,
1458 		.first_channel_id = 149,
1459 		.last_channel_id = 181,
1460 		.channel_spacing_shift = 2,
1461 		.band = PHY_BAND_5
1462 	},
1463 	{
1464 		.start_idx = 51,
1465 		.end_idx = 111,
1466 		.first_channel_id = 1,
1467 		.last_channel_id = 241,
1468 		.channel_spacing_shift = 2,
1469 		.band = PHY_BAND_6
1470 	},
1471 };
1472 
iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id,u8 band)1473 static int iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id, u8 band)
1474 {
1475 	int i, index;
1476 
1477 	if (!channel_id)
1478 		return -EINVAL;
1479 
1480 	for (i = 0; i < ARRAY_SIZE(scan_channel_segments); i++) {
1481 		const struct iwl_mvm_scan_channel_segment *ch_segment =
1482 			&scan_channel_segments[i];
1483 		u32 ch_offset;
1484 
1485 		if (ch_segment->band != band ||
1486 		    ch_segment->first_channel_id > channel_id ||
1487 		    ch_segment->last_channel_id < channel_id)
1488 			continue;
1489 
1490 		ch_offset = (channel_id - ch_segment->first_channel_id) >>
1491 			ch_segment->channel_spacing_shift;
1492 
1493 		index = scan_channel_segments[i].start_idx + ch_offset;
1494 		if (index < IWL_SCAN_NUM_CHANNELS)
1495 			return index;
1496 
1497 		break;
1498 	}
1499 
1500 	return -EINVAL;
1501 }
1502 
1503 static const u8 p2p_go_friendly_chs[] = {
1504 	36, 40, 44, 48, 149, 153, 157, 161, 165,
1505 };
1506 
1507 static const u8 social_chs[] = {
1508 	1, 6, 11
1509 };
1510 
iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type,u8 ch_id,u8 band,u8 * ch_bitmap,size_t bitmap_n_entries)1511 static void iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type,
1512 					       u8 ch_id, u8 band, u8 *ch_bitmap,
1513 					       size_t bitmap_n_entries)
1514 {
1515 	int i;
1516 
1517 	if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1518 		return;
1519 
1520 	for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1521 		if (p2p_go_friendly_chs[i] == ch_id) {
1522 			int ch_idx, bitmap_idx;
1523 
1524 			ch_idx = iwl_mvm_scan_ch_and_band_to_idx(ch_id, band);
1525 			if (ch_idx < 0)
1526 				return;
1527 
1528 			bitmap_idx = ch_idx / 8;
1529 			if (bitmap_idx >= bitmap_n_entries)
1530 				return;
1531 
1532 			ch_idx = ch_idx % 8;
1533 			ch_bitmap[bitmap_idx] |= BIT(ch_idx);
1534 
1535 			return;
1536 		}
1537 	}
1538 }
1539 
iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type,u8 ch_id)1540 static u32 iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id)
1541 {
1542 	int i;
1543 	u32 flags = 0;
1544 
1545 	if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1546 		goto out;
1547 
1548 	for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1549 		if (p2p_go_friendly_chs[i] == ch_id) {
1550 			flags |= IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
1551 			break;
1552 		}
1553 	}
1554 
1555 	if (flags)
1556 		goto out;
1557 
1558 	for (i = 0; i < ARRAY_SIZE(social_chs); i++) {
1559 		if (social_chs[i] == ch_id) {
1560 			flags |= IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT;
1561 			break;
1562 		}
1563 	}
1564 
1565 out:
1566 	return flags;
1567 }
1568 
1569 static void
iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm * mvm,struct ieee80211_channel ** channels,int n_channels,u32 flags,struct iwl_scan_channel_cfg_umac * channel_cfg)1570 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1571 			       struct ieee80211_channel **channels,
1572 			       int n_channels, u32 flags,
1573 			       struct iwl_scan_channel_cfg_umac *channel_cfg)
1574 {
1575 	int i;
1576 
1577 	for (i = 0; i < n_channels; i++) {
1578 		channel_cfg[i].flags = cpu_to_le32(flags);
1579 		channel_cfg[i].v1.channel_num = channels[i]->hw_value;
1580 		if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
1581 			enum nl80211_band band = channels[i]->band;
1582 
1583 			channel_cfg[i].v2.band =
1584 				iwl_mvm_phy_band_from_nl80211(band);
1585 			channel_cfg[i].v2.iter_count = 1;
1586 			channel_cfg[i].v2.iter_interval = 0;
1587 		} else {
1588 			channel_cfg[i].v1.iter_count = 1;
1589 			channel_cfg[i].v1.iter_interval = 0;
1590 		}
1591 	}
1592 }
1593 
1594 static void
iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm * mvm,struct ieee80211_channel ** channels,struct iwl_scan_channel_params_v4 * cp,int n_channels,u32 flags,enum nl80211_iftype vif_type)1595 iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm *mvm,
1596 				  struct ieee80211_channel **channels,
1597 				  struct iwl_scan_channel_params_v4 *cp,
1598 				  int n_channels, u32 flags,
1599 				  enum nl80211_iftype vif_type)
1600 {
1601 	u8 *bitmap = cp->adwell_ch_override_bitmap;
1602 	size_t bitmap_n_entries = ARRAY_SIZE(cp->adwell_ch_override_bitmap);
1603 	int i;
1604 
1605 	for (i = 0; i < n_channels; i++) {
1606 		enum nl80211_band band = channels[i]->band;
1607 		struct iwl_scan_channel_cfg_umac *cfg =
1608 			&cp->channel_config[i];
1609 
1610 		cfg->flags = cpu_to_le32(flags);
1611 		cfg->v2.channel_num = channels[i]->hw_value;
1612 		cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
1613 		cfg->v2.iter_count = 1;
1614 		cfg->v2.iter_interval = 0;
1615 
1616 		iwl_mvm_scan_ch_add_n_aps_override(vif_type,
1617 						   cfg->v2.channel_num,
1618 						   cfg->v2.band, bitmap,
1619 						   bitmap_n_entries);
1620 	}
1621 }
1622 
1623 static void
iwl_mvm_umac_scan_cfg_channels_v6(struct iwl_mvm * mvm,struct ieee80211_channel ** channels,struct iwl_scan_channel_params_v6 * cp,int n_channels,u32 flags,enum nl80211_iftype vif_type)1624 iwl_mvm_umac_scan_cfg_channels_v6(struct iwl_mvm *mvm,
1625 				  struct ieee80211_channel **channels,
1626 				  struct iwl_scan_channel_params_v6 *cp,
1627 				  int n_channels, u32 flags,
1628 				  enum nl80211_iftype vif_type)
1629 {
1630 	int i;
1631 
1632 	for (i = 0; i < n_channels; i++) {
1633 		enum nl80211_band band = channels[i]->band;
1634 		struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i];
1635 		u32 n_aps_flag =
1636 			iwl_mvm_scan_ch_n_aps_flag(vif_type,
1637 						   channels[i]->hw_value);
1638 
1639 		cfg->flags = cpu_to_le32(flags | n_aps_flag);
1640 		cfg->v2.channel_num = channels[i]->hw_value;
1641 		cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
1642 		if (cfg80211_channel_is_psc(channels[i]))
1643 			cfg->flags = 0;
1644 		cfg->v2.iter_count = 1;
1645 		cfg->v2.iter_interval = 0;
1646 	}
1647 }
1648 
1649 static void
iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct iwl_scan_probe_params_v4 * pp)1650 iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm *mvm,
1651 				    struct iwl_mvm_scan_params *params,
1652 				     struct iwl_scan_probe_params_v4 *pp)
1653 {
1654 	int j, idex_s = 0, idex_b = 0;
1655 	struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1656 		params->scan_6ghz_params;
1657 	bool hidden_supported = fw_has_capa(&mvm->fw->ucode_capa,
1658 					    IWL_UCODE_TLV_CAPA_HIDDEN_6GHZ_SCAN);
1659 
1660 	for (j = 0; j < params->n_ssids && idex_s < SCAN_SHORT_SSID_MAX_SIZE;
1661 	     j++) {
1662 		if (!params->ssids[j].ssid_len)
1663 			continue;
1664 
1665 		pp->short_ssid[idex_s] =
1666 			cpu_to_le32(~crc32_le(~0, params->ssids[j].ssid,
1667 					      params->ssids[j].ssid_len));
1668 
1669 		if (hidden_supported) {
1670 			pp->direct_scan[idex_s].id = WLAN_EID_SSID;
1671 			pp->direct_scan[idex_s].len = params->ssids[j].ssid_len;
1672 			memcpy(pp->direct_scan[idex_s].ssid, params->ssids[j].ssid,
1673 			       params->ssids[j].ssid_len);
1674 		}
1675 		idex_s++;
1676 	}
1677 
1678 	/*
1679 	 * Populate the arrays of the short SSIDs and the BSSIDs using the 6GHz
1680 	 * collocated parameters. This might not be optimal, as this processing
1681 	 * does not (yet) correspond to the actual channels, so it is possible
1682 	 * that some entries would be left out.
1683 	 *
1684 	 * TODO: improve this logic.
1685 	 */
1686 	for (j = 0; j < params->n_6ghz_params; j++) {
1687 		int k;
1688 
1689 		/* First, try to place the short SSID */
1690 		if (scan_6ghz_params[j].short_ssid_valid) {
1691 			for (k = 0; k < idex_s; k++) {
1692 				if (pp->short_ssid[k] ==
1693 				    cpu_to_le32(scan_6ghz_params[j].short_ssid))
1694 					break;
1695 			}
1696 
1697 			if (k == idex_s && idex_s < SCAN_SHORT_SSID_MAX_SIZE) {
1698 				pp->short_ssid[idex_s++] =
1699 					cpu_to_le32(scan_6ghz_params[j].short_ssid);
1700 			}
1701 		}
1702 
1703 		/* try to place BSSID for the same entry */
1704 		for (k = 0; k < idex_b; k++) {
1705 			if (!memcmp(&pp->bssid_array[k],
1706 				    scan_6ghz_params[j].bssid, ETH_ALEN))
1707 				break;
1708 		}
1709 
1710 		if (k == idex_b && idex_b < SCAN_BSSID_MAX_SIZE) {
1711 			memcpy(&pp->bssid_array[idex_b++],
1712 			       scan_6ghz_params[j].bssid, ETH_ALEN);
1713 		}
1714 	}
1715 
1716 	pp->short_ssid_num = idex_s;
1717 	pp->bssid_num = idex_b;
1718 }
1719 
1720 /* TODO: this function can be merged with iwl_mvm_scan_umac_fill_ch_p_v6 */
1721 static u32
iwl_mvm_umac_scan_cfg_channels_v6_6g(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,u32 n_channels,struct iwl_scan_probe_params_v4 * pp,struct iwl_scan_channel_params_v6 * cp,enum nl80211_iftype vif_type)1722 iwl_mvm_umac_scan_cfg_channels_v6_6g(struct iwl_mvm *mvm,
1723 				     struct iwl_mvm_scan_params *params,
1724 				     u32 n_channels,
1725 				     struct iwl_scan_probe_params_v4 *pp,
1726 				     struct iwl_scan_channel_params_v6 *cp,
1727 				     enum nl80211_iftype vif_type)
1728 {
1729 	int i;
1730 	struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1731 		params->scan_6ghz_params;
1732 	u32 ch_cnt;
1733 
1734 	for (i = 0, ch_cnt = 0; i < params->n_channels; i++) {
1735 		struct iwl_scan_channel_cfg_umac *cfg =
1736 			&cp->channel_config[ch_cnt];
1737 
1738 		u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0;
1739 		u8 j, k, s_max = 0, b_max = 0, n_used_bssid_entries;
1740 		bool force_passive, found = false, allow_passive = true,
1741 		     unsolicited_probe_on_chan = false, psc_no_listen = false;
1742 
1743 		/*
1744 		 * Avoid performing passive scan on non PSC channels unless the
1745 		 * scan is specifically a passive scan, i.e., no SSIDs
1746 		 * configured in the scan command.
1747 		 */
1748 		if (!cfg80211_channel_is_psc(params->channels[i]) &&
1749 		    !params->n_6ghz_params && params->n_ssids)
1750 			continue;
1751 
1752 		cfg->v1.channel_num = params->channels[i]->hw_value;
1753 		cfg->v2.band = 2;
1754 		cfg->v2.iter_count = 1;
1755 		cfg->v2.iter_interval = 0;
1756 
1757 		/*
1758 		 * The optimize the scan time, i.e., reduce the scan dwell time
1759 		 * on each channel, the below logic tries to set 3 direct BSSID
1760 		 * probe requests for each broadcast probe request with a short
1761 		 * SSID.
1762 		 * TODO: improve this logic
1763 		 */
1764 		n_used_bssid_entries = 3;
1765 		for (j = 0; j < params->n_6ghz_params; j++) {
1766 			if (!(scan_6ghz_params[j].channel_idx == i))
1767 				continue;
1768 
1769 			found = false;
1770 			unsolicited_probe_on_chan |=
1771 				scan_6ghz_params[j].unsolicited_probe;
1772 			psc_no_listen |= scan_6ghz_params[j].psc_no_listen;
1773 
1774 			for (k = 0; k < pp->short_ssid_num; k++) {
1775 				if (!scan_6ghz_params[j].unsolicited_probe &&
1776 				    le32_to_cpu(pp->short_ssid[k]) ==
1777 				    scan_6ghz_params[j].short_ssid) {
1778 					/* Relevant short SSID bit set */
1779 					if (s_ssid_bitmap & BIT(k)) {
1780 						found = true;
1781 						break;
1782 					}
1783 
1784 					/*
1785 					 * Use short SSID only to create a new
1786 					 * iteration during channel dwell or in
1787 					 * case that the short SSID has a
1788 					 * matching SSID, i.e., scan for hidden
1789 					 * APs.
1790 					 */
1791 					if (n_used_bssid_entries >= 3) {
1792 						s_ssid_bitmap |= BIT(k);
1793 						s_max++;
1794 						n_used_bssid_entries -= 3;
1795 						found = true;
1796 						break;
1797 					} else if (pp->direct_scan[k].len) {
1798 						s_ssid_bitmap |= BIT(k);
1799 						s_max++;
1800 						found = true;
1801 						allow_passive = false;
1802 						break;
1803 					}
1804 				}
1805 			}
1806 
1807 			if (found)
1808 				continue;
1809 
1810 			for (k = 0; k < pp->bssid_num; k++) {
1811 				if (!memcmp(&pp->bssid_array[k],
1812 					    scan_6ghz_params[j].bssid,
1813 					    ETH_ALEN)) {
1814 					if (!(bssid_bitmap & BIT(k))) {
1815 						bssid_bitmap |= BIT(k);
1816 						b_max++;
1817 						n_used_bssid_entries++;
1818 					}
1819 					break;
1820 				}
1821 			}
1822 		}
1823 
1824 		if (cfg80211_channel_is_psc(params->channels[i]) &&
1825 		    psc_no_listen)
1826 			flags |= IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN;
1827 
1828 		if (unsolicited_probe_on_chan)
1829 			flags |= IWL_UHB_CHAN_CFG_FLAG_UNSOLICITED_PROBE_RES;
1830 
1831 		/*
1832 		 * In the following cases apply passive scan:
1833 		 * 1. Non fragmented scan:
1834 		 *	- PSC channel with NO_LISTEN_FLAG on should be treated
1835 		 *	  like non PSC channel
1836 		 *	- Non PSC channel with more than 3 short SSIDs or more
1837 		 *	  than 9 BSSIDs.
1838 		 *	- Non PSC Channel with unsolicited probe response and
1839 		 *	  more than 2 short SSIDs or more than 6 BSSIDs.
1840 		 *	- PSC channel with more than 2 short SSIDs or more than
1841 		 *	  6 BSSIDs.
1842 		 * 3. Fragmented scan:
1843 		 *	- PSC channel with more than 1 SSID or 3 BSSIDs.
1844 		 *	- Non PSC channel with more than 2 SSIDs or 6 BSSIDs.
1845 		 *	- Non PSC channel with unsolicited probe response and
1846 		 *	  more than 1 SSID or more than 3 BSSIDs.
1847 		 */
1848 		if (!iwl_mvm_is_scan_fragmented(params->type)) {
1849 			if (!cfg80211_channel_is_psc(params->channels[i]) ||
1850 			    flags & IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN) {
1851 				force_passive = (s_max > 3 || b_max > 9);
1852 				force_passive |= (unsolicited_probe_on_chan &&
1853 						  (s_max > 2 || b_max > 6));
1854 			} else {
1855 				force_passive = (s_max > 2 || b_max > 6);
1856 			}
1857 		} else if (cfg80211_channel_is_psc(params->channels[i])) {
1858 			force_passive = (s_max > 1 || b_max > 3);
1859 		} else {
1860 			force_passive = (s_max > 2 || b_max > 6);
1861 			force_passive |= (unsolicited_probe_on_chan &&
1862 					  (s_max > 1 || b_max > 3));
1863 		}
1864 		if ((allow_passive && force_passive) ||
1865 		    (!(bssid_bitmap | s_ssid_bitmap) &&
1866 		     !cfg80211_channel_is_psc(params->channels[i])))
1867 			flags |= IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE;
1868 		else
1869 			flags |= bssid_bitmap | (s_ssid_bitmap << 16);
1870 
1871 		cfg->flags |= cpu_to_le32(flags);
1872 		ch_cnt++;
1873 	}
1874 
1875 	if (params->n_channels > ch_cnt)
1876 		IWL_DEBUG_SCAN(mvm,
1877 			       "6GHz: reducing number channels: (%u->%u)\n",
1878 			       params->n_channels, ch_cnt);
1879 
1880 	return ch_cnt;
1881 }
1882 
iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)1883 static u8 iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm *mvm,
1884 					  struct iwl_mvm_scan_params *params,
1885 					  struct ieee80211_vif *vif)
1886 {
1887 	u8 flags = 0;
1888 
1889 	flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER;
1890 
1891 	if (iwl_mvm_scan_use_ebs(mvm, vif))
1892 		flags |= IWL_SCAN_CHANNEL_FLAG_EBS |
1893 			IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1894 			IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1895 
1896 	/* set fragmented ebs for fragmented scan on HB channels */
1897 	if ((!iwl_mvm_is_cdb_supported(mvm) &&
1898 	     iwl_mvm_is_scan_fragmented(params->type)) ||
1899 	    (iwl_mvm_is_cdb_supported(mvm) &&
1900 	     iwl_mvm_is_scan_fragmented(params->hb_type)))
1901 		flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
1902 
1903 	/*
1904 	 * force EBS in case the scan is a fragmented and there is a need to take P2P
1905 	 * GO operation into consideration during scan operation.
1906 	 */
1907 	if ((!iwl_mvm_is_cdb_supported(mvm) &&
1908 	     iwl_mvm_is_scan_fragmented(params->type) && params->respect_p2p_go) ||
1909 	    (iwl_mvm_is_cdb_supported(mvm) &&
1910 	     iwl_mvm_is_scan_fragmented(params->hb_type) &&
1911 	     params->respect_p2p_go_hb)) {
1912 		IWL_DEBUG_SCAN(mvm, "Respect P2P GO. Force EBS\n");
1913 		flags |= IWL_SCAN_CHANNEL_FLAG_FORCE_EBS;
1914 	}
1915 
1916 	return flags;
1917 }
1918 
iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)1919 static void iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm *mvm,
1920 					   struct iwl_mvm_scan_params *params,
1921 					   struct ieee80211_vif *vif)
1922 {
1923 	struct ieee80211_supported_band *sband =
1924 		&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
1925 	u32 n_disabled, i;
1926 
1927 	params->enable_6ghz_passive = false;
1928 
1929 	if (params->scan_6ghz)
1930 		return;
1931 
1932 	if (!fw_has_capa(&mvm->fw->ucode_capa,
1933 			 IWL_UCODE_TLV_CAPA_PASSIVE_6GHZ_SCAN)) {
1934 		IWL_DEBUG_SCAN(mvm,
1935 			       "6GHz passive scan: Not supported by FW\n");
1936 		return;
1937 	}
1938 
1939 	/* 6GHz passive scan allowed only on station interface  */
1940 	if (vif->type != NL80211_IFTYPE_STATION) {
1941 		IWL_DEBUG_SCAN(mvm,
1942 			       "6GHz passive scan: not station interface\n");
1943 		return;
1944 	}
1945 
1946 	/*
1947 	 * 6GHz passive scan is allowed in a defined time interval following HW
1948 	 * reset or resume flow, or while not associated and a large interval
1949 	 * has passed since the last 6GHz passive scan.
1950 	 */
1951 	if ((vif->cfg.assoc ||
1952 	     time_after(mvm->last_6ghz_passive_scan_jiffies +
1953 			(IWL_MVM_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) &&
1954 	    (time_before(mvm->last_reset_or_resume_time_jiffies +
1955 			 (IWL_MVM_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ),
1956 			 jiffies))) {
1957 		IWL_DEBUG_SCAN(mvm, "6GHz passive scan: %s\n",
1958 			       vif->cfg.assoc ? "associated" :
1959 			       "timeout did not expire");
1960 		return;
1961 	}
1962 
1963 	/* not enough channels in the regular scan request */
1964 	if (params->n_channels < IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS) {
1965 		IWL_DEBUG_SCAN(mvm,
1966 			       "6GHz passive scan: not enough channels\n");
1967 		return;
1968 	}
1969 
1970 	for (i = 0; i < params->n_ssids; i++) {
1971 		if (!params->ssids[i].ssid_len)
1972 			break;
1973 	}
1974 
1975 	/* not a wildcard scan, so cannot enable passive 6GHz scan */
1976 	if (i == params->n_ssids) {
1977 		IWL_DEBUG_SCAN(mvm,
1978 			       "6GHz passive scan: no wildcard SSID\n");
1979 		return;
1980 	}
1981 
1982 	if (!sband || !sband->n_channels) {
1983 		IWL_DEBUG_SCAN(mvm,
1984 			       "6GHz passive scan: no 6GHz channels\n");
1985 		return;
1986 	}
1987 
1988 	for (i = 0, n_disabled = 0; i < sband->n_channels; i++) {
1989 		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED))
1990 			n_disabled++;
1991 	}
1992 
1993 	/*
1994 	 * Not all the 6GHz channels are disabled, so no need for 6GHz passive
1995 	 * scan
1996 	 */
1997 	if (n_disabled != sband->n_channels) {
1998 		IWL_DEBUG_SCAN(mvm,
1999 			       "6GHz passive scan: 6GHz channels enabled\n");
2000 		return;
2001 	}
2002 
2003 	/* all conditions to enable 6ghz passive scan are satisfied */
2004 	IWL_DEBUG_SCAN(mvm, "6GHz passive scan: can be enabled\n");
2005 	params->enable_6ghz_passive = true;
2006 }
2007 
iwl_mvm_scan_umac_flags_v2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,int type)2008 static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm,
2009 				      struct iwl_mvm_scan_params *params,
2010 				      struct ieee80211_vif *vif,
2011 				      int type)
2012 {
2013 	u16 flags = 0;
2014 
2015 	/*
2016 	 * If no direct SSIDs are provided perform a passive scan. Otherwise,
2017 	 * if there is a single SSID which is not the broadcast SSID, assume
2018 	 * that the scan is intended for roaming purposes and thus enable Rx on
2019 	 * all chains to improve chances of hearing the beacons/probe responses.
2020 	 */
2021 	if (params->n_ssids == 0)
2022 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE;
2023 	else if (params->n_ssids == 1 && params->ssids[0].ssid_len)
2024 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_USE_ALL_RX_CHAINS;
2025 
2026 	if (iwl_mvm_is_scan_fragmented(params->type))
2027 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
2028 
2029 	if (iwl_mvm_is_scan_fragmented(params->hb_type))
2030 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2;
2031 
2032 	if (params->pass_all)
2033 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL;
2034 	else
2035 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH;
2036 
2037 	if (!iwl_mvm_is_regular_scan(params))
2038 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC;
2039 
2040 	if (params->iter_notif ||
2041 	    mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2042 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE;
2043 
2044 	if (IWL_MVM_ADWELL_ENABLE)
2045 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL;
2046 
2047 	if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2048 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE;
2049 
2050 	if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2051 	    params->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ)
2052 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_TRIGGER_UHB_SCAN;
2053 
2054 	if (params->enable_6ghz_passive)
2055 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_6GHZ_PASSIVE_SCAN;
2056 
2057 	if (iwl_mvm_is_oce_supported(mvm) &&
2058 	    (params->flags & (NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP |
2059 			      NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE |
2060 			      NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)))
2061 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_OCE;
2062 
2063 	return flags;
2064 }
2065 
iwl_mvm_scan_umac_flags2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,int type)2066 static u8 iwl_mvm_scan_umac_flags2(struct iwl_mvm *mvm,
2067 				   struct iwl_mvm_scan_params *params,
2068 				   struct ieee80211_vif *vif, int type)
2069 {
2070 	u8 flags = 0;
2071 
2072 	if (iwl_mvm_is_cdb_supported(mvm)) {
2073 		if (params->respect_p2p_go)
2074 			flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB;
2075 		if (params->respect_p2p_go_hb)
2076 			flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2077 	} else {
2078 		if (params->respect_p2p_go)
2079 			flags = IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB |
2080 				IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2081 	}
2082 
2083 	return flags;
2084 }
2085 
iwl_mvm_scan_umac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2086 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
2087 				   struct iwl_mvm_scan_params *params,
2088 				   struct ieee80211_vif *vif)
2089 {
2090 	u16 flags = 0;
2091 
2092 	if (params->n_ssids == 0)
2093 		flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
2094 
2095 	if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
2096 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
2097 
2098 	if (iwl_mvm_is_scan_fragmented(params->type))
2099 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
2100 
2101 	if (iwl_mvm_is_cdb_supported(mvm) &&
2102 	    iwl_mvm_is_scan_fragmented(params->hb_type))
2103 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
2104 
2105 	if (iwl_mvm_rrm_scan_needed(mvm) &&
2106 	    fw_has_capa(&mvm->fw->ucode_capa,
2107 			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
2108 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
2109 
2110 	if (params->pass_all)
2111 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
2112 	else
2113 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
2114 
2115 	if (!iwl_mvm_is_regular_scan(params))
2116 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
2117 
2118 	if (params->iter_notif)
2119 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2120 
2121 #ifdef CONFIG_IWLWIFI_DEBUGFS
2122 	if (mvm->scan_iter_notif_enabled)
2123 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2124 #endif
2125 
2126 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2127 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2128 
2129 	if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE)
2130 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
2131 
2132 	/*
2133 	 * Extended dwell is relevant only for low band to start with, as it is
2134 	 * being used for social channles only (1, 6, 11), so we can check
2135 	 * only scan type on low band also for CDB.
2136 	 */
2137 	if (iwl_mvm_is_regular_scan(params) &&
2138 	    vif->type != NL80211_IFTYPE_P2P_DEVICE &&
2139 	    !iwl_mvm_is_scan_fragmented(params->type) &&
2140 	    !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
2141 	    !iwl_mvm_is_oce_supported(mvm))
2142 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
2143 
2144 	if (iwl_mvm_is_oce_supported(mvm)) {
2145 		if ((params->flags &
2146 		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
2147 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
2148 		/* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
2149 		 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
2150 		 * the same bit, we need to make sure that we use this bit here
2151 		 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
2152 		 * used. */
2153 		if ((params->flags &
2154 		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
2155 		     !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
2156 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
2157 		if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
2158 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
2159 	}
2160 
2161 	return flags;
2162 }
2163 
2164 static int
iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params * params,struct iwl_scan_umac_schedule * schedule,__le16 * delay)2165 iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params *params,
2166 			       struct iwl_scan_umac_schedule *schedule,
2167 			       __le16 *delay)
2168 {
2169 	int i;
2170 	if (WARN_ON(!params->n_scan_plans ||
2171 		    params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
2172 		return -EINVAL;
2173 
2174 	for (i = 0; i < params->n_scan_plans; i++) {
2175 		struct cfg80211_sched_scan_plan *scan_plan =
2176 			&params->scan_plans[i];
2177 
2178 		schedule[i].iter_count = scan_plan->iterations;
2179 		schedule[i].interval =
2180 			cpu_to_le16(scan_plan->interval);
2181 	}
2182 
2183 	/*
2184 	 * If the number of iterations of the last scan plan is set to
2185 	 * zero, it should run infinitely. However, this is not always the case.
2186 	 * For example, when regular scan is requested the driver sets one scan
2187 	 * plan with one iteration.
2188 	 */
2189 	if (!schedule[params->n_scan_plans - 1].iter_count)
2190 		schedule[params->n_scan_plans - 1].iter_count = 0xff;
2191 
2192 	*delay = cpu_to_le16(params->delay);
2193 
2194 	return 0;
2195 }
2196 
iwl_mvm_scan_umac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2197 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2198 			     struct iwl_mvm_scan_params *params,
2199 			     int type, int uid)
2200 {
2201 	struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
2202 	struct iwl_scan_umac_chan_param *chan_param;
2203 	void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
2204 	void *sec_part = (u8 *)cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) *
2205 		mvm->fw->ucode_capa.n_scan_channels;
2206 	struct iwl_scan_req_umac_tail_v2 *tail_v2 =
2207 		(struct iwl_scan_req_umac_tail_v2 *)sec_part;
2208 	struct iwl_scan_req_umac_tail_v1 *tail_v1;
2209 	struct iwl_ssid_ie *direct_scan;
2210 	int ret = 0;
2211 	u32 ssid_bitmap = 0;
2212 	u8 channel_flags = 0;
2213 	u16 gen_flags;
2214 	struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2215 
2216 	chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
2217 
2218 	iwl_mvm_scan_umac_dwell(mvm, cmd, params);
2219 
2220 	mvm->scan_uid_status[uid] = type;
2221 
2222 	cmd->uid = cpu_to_le32(uid);
2223 	gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
2224 	cmd->general_flags = cpu_to_le16(gen_flags);
2225 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
2226 		if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
2227 			cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
2228 							IWL_SCAN_NUM_OF_FRAGS;
2229 		if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
2230 			cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
2231 							IWL_SCAN_NUM_OF_FRAGS;
2232 
2233 		cmd->v8.general_flags2 =
2234 			IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER;
2235 	}
2236 
2237 	cmd->scan_start_mac_id = scan_vif->id;
2238 
2239 	if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2240 		cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
2241 
2242 	if (iwl_mvm_scan_use_ebs(mvm, vif)) {
2243 		channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
2244 				IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
2245 				IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
2246 
2247 		/* set fragmented ebs for fragmented scan on HB channels */
2248 		if (iwl_mvm_is_frag_ebs_supported(mvm)) {
2249 			if (gen_flags &
2250 			    IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED ||
2251 			    (!iwl_mvm_is_cdb_supported(mvm) &&
2252 			     gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED))
2253 				channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
2254 		}
2255 	}
2256 
2257 	chan_param->flags = channel_flags;
2258 	chan_param->count = params->n_channels;
2259 
2260 	ret = iwl_mvm_fill_scan_sched_params(params, tail_v2->schedule,
2261 					     &tail_v2->delay);
2262 	if (ret) {
2263 		mvm->scan_uid_status[uid] = 0;
2264 		return ret;
2265 	}
2266 
2267 	if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
2268 		tail_v2->preq = params->preq;
2269 		direct_scan = tail_v2->direct_scan;
2270 	} else {
2271 		tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part;
2272 		iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq,
2273 						  &params->preq);
2274 		direct_scan = tail_v1->direct_scan;
2275 	}
2276 	iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap);
2277 	iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
2278 				       params->n_channels, ssid_bitmap,
2279 				       cmd_data);
2280 	return 0;
2281 }
2282 
2283 static void
iwl_mvm_scan_umac_fill_general_p_v11(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,struct iwl_scan_general_params_v11 * gp,u16 gen_flags,u8 gen_flags2)2284 iwl_mvm_scan_umac_fill_general_p_v11(struct iwl_mvm *mvm,
2285 				     struct iwl_mvm_scan_params *params,
2286 				     struct ieee80211_vif *vif,
2287 				     struct iwl_scan_general_params_v11 *gp,
2288 				     u16 gen_flags, u8 gen_flags2)
2289 {
2290 	struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2291 
2292 	iwl_mvm_scan_umac_dwell_v11(mvm, gp, params);
2293 
2294 	IWL_DEBUG_SCAN(mvm, "Gerenal: flags=0x%x, flags2=0x%x\n",
2295 		       gen_flags, gen_flags2);
2296 
2297 	gp->flags = cpu_to_le16(gen_flags);
2298 	gp->flags2 = gen_flags2;
2299 
2300 	if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1)
2301 		gp->num_of_fragments[SCAN_LB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2302 	if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2)
2303 		gp->num_of_fragments[SCAN_HB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2304 
2305 	gp->scan_start_mac_id = scan_vif->id;
2306 }
2307 
2308 static void
iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params * params,struct iwl_scan_probe_params_v3 * pp)2309 iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params *params,
2310 				  struct iwl_scan_probe_params_v3 *pp)
2311 {
2312 	pp->preq = params->preq;
2313 	pp->ssid_num = params->n_ssids;
2314 	iwl_scan_build_ssids(params, pp->direct_scan, NULL);
2315 }
2316 
2317 static void
iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params * params,struct iwl_scan_probe_params_v4 * pp,u32 * bitmap_ssid)2318 iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params *params,
2319 				  struct iwl_scan_probe_params_v4 *pp,
2320 				  u32 *bitmap_ssid)
2321 {
2322 	pp->preq = params->preq;
2323 	iwl_scan_build_ssids(params, pp->direct_scan, bitmap_ssid);
2324 }
2325 
2326 static void
iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,struct iwl_scan_channel_params_v4 * cp,u32 channel_cfg_flags)2327 iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm *mvm,
2328 			       struct iwl_mvm_scan_params *params,
2329 			       struct ieee80211_vif *vif,
2330 			       struct iwl_scan_channel_params_v4 *cp,
2331 			       u32 channel_cfg_flags)
2332 {
2333 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2334 	cp->count = params->n_channels;
2335 	cp->num_of_aps_override = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2336 
2337 	iwl_mvm_umac_scan_cfg_channels_v4(mvm, params->channels, cp,
2338 					  params->n_channels,
2339 					  channel_cfg_flags,
2340 					  vif->type);
2341 }
2342 
2343 static void
iwl_mvm_scan_umac_fill_ch_p_v6(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,struct iwl_scan_channel_params_v6 * cp,u32 channel_cfg_flags)2344 iwl_mvm_scan_umac_fill_ch_p_v6(struct iwl_mvm *mvm,
2345 			       struct iwl_mvm_scan_params *params,
2346 			       struct ieee80211_vif *vif,
2347 			       struct iwl_scan_channel_params_v6 *cp,
2348 			       u32 channel_cfg_flags)
2349 {
2350 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2351 	cp->count = params->n_channels;
2352 	cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2353 	cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2354 
2355 	iwl_mvm_umac_scan_cfg_channels_v6(mvm, params->channels, cp,
2356 					  params->n_channels,
2357 					  channel_cfg_flags,
2358 					  vif->type);
2359 
2360 	if (params->enable_6ghz_passive) {
2361 		struct ieee80211_supported_band *sband =
2362 			&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
2363 		u32 i;
2364 
2365 		for (i = 0; i < sband->n_channels; i++) {
2366 			struct ieee80211_channel *channel =
2367 				&sband->channels[i];
2368 
2369 			struct iwl_scan_channel_cfg_umac *cfg =
2370 				&cp->channel_config[cp->count];
2371 
2372 			if (!cfg80211_channel_is_psc(channel))
2373 				continue;
2374 
2375 			cfg->flags = 0;
2376 			cfg->v2.channel_num = channel->hw_value;
2377 			cfg->v2.band = PHY_BAND_6;
2378 			cfg->v2.iter_count = 1;
2379 			cfg->v2.iter_interval = 0;
2380 			cp->count++;
2381 		}
2382 	}
2383 }
2384 
iwl_mvm_scan_umac_v12(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2385 static int iwl_mvm_scan_umac_v12(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2386 				 struct iwl_mvm_scan_params *params, int type,
2387 				 int uid)
2388 {
2389 	struct iwl_scan_req_umac_v12 *cmd = mvm->scan_cmd;
2390 	struct iwl_scan_req_params_v12 *scan_p = &cmd->scan_params;
2391 	int ret;
2392 	u16 gen_flags;
2393 
2394 	mvm->scan_uid_status[uid] = type;
2395 
2396 	cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2397 	cmd->uid = cpu_to_le32(uid);
2398 
2399 	gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2400 	iwl_mvm_scan_umac_fill_general_p_v11(mvm, params, vif,
2401 					     &scan_p->general_params,
2402 					     gen_flags, 0);
2403 
2404 	ret = iwl_mvm_fill_scan_sched_params(params,
2405 					     scan_p->periodic_params.schedule,
2406 					     &scan_p->periodic_params.delay);
2407 	if (ret)
2408 		return ret;
2409 
2410 	iwl_mvm_scan_umac_fill_probe_p_v3(params, &scan_p->probe_params);
2411 	iwl_mvm_scan_umac_fill_ch_p_v4(mvm, params, vif,
2412 				       &scan_p->channel_params, 0);
2413 
2414 	return 0;
2415 }
2416 
iwl_mvm_scan_umac_v14_and_above(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid,u32 version)2417 static int iwl_mvm_scan_umac_v14_and_above(struct iwl_mvm *mvm,
2418 					   struct ieee80211_vif *vif,
2419 					   struct iwl_mvm_scan_params *params,
2420 					   int type, int uid, u32 version)
2421 {
2422 	struct iwl_scan_req_umac_v15 *cmd = mvm->scan_cmd;
2423 	struct iwl_scan_req_params_v15 *scan_p = &cmd->scan_params;
2424 	struct iwl_scan_channel_params_v6 *cp = &scan_p->channel_params;
2425 	struct iwl_scan_probe_params_v4 *pb = &scan_p->probe_params;
2426 	int ret;
2427 	u16 gen_flags;
2428 	u8 gen_flags2;
2429 	u32 bitmap_ssid = 0;
2430 
2431 	mvm->scan_uid_status[uid] = type;
2432 
2433 	cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2434 	cmd->uid = cpu_to_le32(uid);
2435 
2436 	gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2437 
2438 	if (version >= 15)
2439 		gen_flags2 = iwl_mvm_scan_umac_flags2(mvm, params, vif, type);
2440 	else
2441 		gen_flags2 = 0;
2442 
2443 	iwl_mvm_scan_umac_fill_general_p_v11(mvm, params, vif,
2444 					     &scan_p->general_params,
2445 					     gen_flags, gen_flags2);
2446 
2447 	ret = iwl_mvm_fill_scan_sched_params(params,
2448 					     scan_p->periodic_params.schedule,
2449 					     &scan_p->periodic_params.delay);
2450 	if (ret)
2451 		return ret;
2452 
2453 	if (!params->scan_6ghz) {
2454 		iwl_mvm_scan_umac_fill_probe_p_v4(params, &scan_p->probe_params,
2455 					  &bitmap_ssid);
2456 		iwl_mvm_scan_umac_fill_ch_p_v6(mvm, params, vif,
2457 				       &scan_p->channel_params, bitmap_ssid);
2458 
2459 		return 0;
2460 	} else {
2461 		pb->preq = params->preq;
2462 	}
2463 
2464 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2465 	cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2466 	cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2467 
2468 	iwl_mvm_umac_scan_fill_6g_chan_list(mvm, params, pb);
2469 
2470 	cp->count = iwl_mvm_umac_scan_cfg_channels_v6_6g(mvm, params,
2471 							 params->n_channels,
2472 							 pb, cp, vif->type);
2473 	if (!cp->count) {
2474 		mvm->scan_uid_status[uid] = 0;
2475 		return -EINVAL;
2476 	}
2477 
2478 	if (!params->n_ssids ||
2479 	    (params->n_ssids == 1 && !params->ssids[0].ssid_len))
2480 		cp->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER;
2481 
2482 	return 0;
2483 }
2484 
iwl_mvm_scan_umac_v14(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2485 static int iwl_mvm_scan_umac_v14(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2486 				 struct iwl_mvm_scan_params *params, int type,
2487 				 int uid)
2488 {
2489 	return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 14);
2490 }
2491 
iwl_mvm_scan_umac_v15(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2492 static int iwl_mvm_scan_umac_v15(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2493 				 struct iwl_mvm_scan_params *params, int type,
2494 				 int uid)
2495 {
2496 	return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 15);
2497 }
2498 
iwl_mvm_num_scans(struct iwl_mvm * mvm)2499 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
2500 {
2501 	return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
2502 }
2503 
iwl_mvm_check_running_scans(struct iwl_mvm * mvm,int type)2504 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
2505 {
2506 	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2507 					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2508 
2509 	/* This looks a bit arbitrary, but the idea is that if we run
2510 	 * out of possible simultaneous scans and the userspace is
2511 	 * trying to run a scan type that is already running, we
2512 	 * return -EBUSY.  But if the userspace wants to start a
2513 	 * different type of scan, we stop the opposite type to make
2514 	 * space for the new request.  The reason is backwards
2515 	 * compatibility with old wpa_supplicant that wouldn't stop a
2516 	 * scheduled scan before starting a normal scan.
2517 	 */
2518 
2519 	/* FW supports only a single periodic scan */
2520 	if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2521 	    mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT))
2522 		return -EBUSY;
2523 
2524 	if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
2525 		return 0;
2526 
2527 	/* Use a switch, even though this is a bitmask, so that more
2528 	 * than one bits set will fall in default and we will warn.
2529 	 */
2530 	switch (type) {
2531 	case IWL_MVM_SCAN_REGULAR:
2532 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2533 			return -EBUSY;
2534 		return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2535 	case IWL_MVM_SCAN_SCHED:
2536 		if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2537 			return -EBUSY;
2538 		return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2539 	case IWL_MVM_SCAN_NETDETECT:
2540 		/* For non-unified images, there's no need to stop
2541 		 * anything for net-detect since the firmware is
2542 		 * restarted anyway.  This way, any sched scans that
2543 		 * were running will be restarted when we resume.
2544 		 */
2545 		if (!unified_image)
2546 			return 0;
2547 
2548 		/* If this is a unified image and we ran out of scans,
2549 		 * we need to stop something.  Prefer stopping regular
2550 		 * scans, because the results are useless at this
2551 		 * point, and we should be able to keep running
2552 		 * another scheduled scan while suspended.
2553 		 */
2554 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2555 			return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
2556 						 true);
2557 		if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2558 			return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
2559 						 true);
2560 		/* Something is wrong if no scan was running but we
2561 		 * ran out of scans.
2562 		 */
2563 		fallthrough;
2564 	default:
2565 		WARN_ON(1);
2566 		break;
2567 	}
2568 
2569 	return -EIO;
2570 }
2571 
2572 #define SCAN_TIMEOUT 30000
2573 
iwl_mvm_scan_timeout_wk(struct work_struct * work)2574 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
2575 {
2576 	struct delayed_work *delayed_work = to_delayed_work(work);
2577 	struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
2578 					   scan_timeout_dwork);
2579 
2580 	IWL_ERR(mvm, "regular scan timed out\n");
2581 
2582 	iwl_force_nmi(mvm->trans);
2583 }
2584 
iwl_mvm_fill_scan_type(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2585 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm,
2586 				   struct iwl_mvm_scan_params *params,
2587 				   struct ieee80211_vif *vif)
2588 {
2589 	if (iwl_mvm_is_cdb_supported(mvm)) {
2590 		params->type =
2591 			iwl_mvm_get_scan_type_band(mvm, vif,
2592 						   NL80211_BAND_2GHZ);
2593 		params->hb_type =
2594 			iwl_mvm_get_scan_type_band(mvm, vif,
2595 						   NL80211_BAND_5GHZ);
2596 	} else {
2597 		params->type = iwl_mvm_get_scan_type(mvm, vif);
2598 	}
2599 }
2600 
2601 struct iwl_scan_umac_handler {
2602 	u8 version;
2603 	int (*handler)(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2604 		       struct iwl_mvm_scan_params *params, int type, int uid);
2605 };
2606 
2607 #define IWL_SCAN_UMAC_HANDLER(_ver) {		\
2608 	.version = _ver,			\
2609 	.handler = iwl_mvm_scan_umac_v##_ver,	\
2610 }
2611 
2612 static const struct iwl_scan_umac_handler iwl_scan_umac_handlers[] = {
2613 	/* set the newest version first to shorten the list traverse time */
2614 	IWL_SCAN_UMAC_HANDLER(15),
2615 	IWL_SCAN_UMAC_HANDLER(14),
2616 	IWL_SCAN_UMAC_HANDLER(12),
2617 };
2618 
iwl_mvm_build_scan_cmd(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_host_cmd * hcmd,struct iwl_mvm_scan_params * params,int type)2619 static int iwl_mvm_build_scan_cmd(struct iwl_mvm *mvm,
2620 				  struct ieee80211_vif *vif,
2621 				  struct iwl_host_cmd *hcmd,
2622 				  struct iwl_mvm_scan_params *params,
2623 				  int type)
2624 {
2625 	int uid, i, err;
2626 	u8 scan_ver;
2627 
2628 	lockdep_assert_held(&mvm->mutex);
2629 	memset(mvm->scan_cmd, 0, mvm->scan_cmd_size);
2630 
2631 	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2632 		hcmd->id = SCAN_OFFLOAD_REQUEST_CMD;
2633 
2634 		return iwl_mvm_scan_lmac(mvm, vif, params);
2635 	}
2636 
2637 	uid = iwl_mvm_scan_uid_by_status(mvm, 0);
2638 	if (uid < 0)
2639 		return uid;
2640 
2641 	hcmd->id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_REQ_UMAC);
2642 
2643 	scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
2644 					 IWL_FW_CMD_VER_UNKNOWN);
2645 
2646 	for (i = 0; i < ARRAY_SIZE(iwl_scan_umac_handlers); i++) {
2647 		const struct iwl_scan_umac_handler *ver_handler =
2648 			&iwl_scan_umac_handlers[i];
2649 
2650 		if (ver_handler->version != scan_ver)
2651 			continue;
2652 
2653 		return ver_handler->handler(mvm, vif, params, type, uid);
2654 	}
2655 
2656 	err = iwl_mvm_scan_umac(mvm, vif, params, type, uid);
2657 	if (err)
2658 		return err;
2659 
2660 	return uid;
2661 }
2662 
2663 struct iwl_mvm_scan_respect_p2p_go_iter_data {
2664 	struct ieee80211_vif *current_vif;
2665 	bool p2p_go;
2666 	enum nl80211_band band;
2667 };
2668 
iwl_mvm_scan_respect_p2p_go_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)2669 static void iwl_mvm_scan_respect_p2p_go_iter(void *_data, u8 *mac,
2670 					     struct ieee80211_vif *vif)
2671 {
2672 	struct iwl_mvm_scan_respect_p2p_go_iter_data *data = _data;
2673 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2674 
2675 	/* exclude the given vif */
2676 	if (vif == data->current_vif)
2677 		return;
2678 
2679 	if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
2680 	    mvmvif->phy_ctxt->id < NUM_PHY_CTX &&
2681 	    (data->band == NUM_NL80211_BANDS ||
2682 	     mvmvif->phy_ctxt->channel->band == data->band))
2683 		data->p2p_go = true;
2684 }
2685 
_iwl_mvm_get_respect_p2p_go(struct iwl_mvm * mvm,struct ieee80211_vif * vif,bool low_latency,enum nl80211_band band)2686 static bool _iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2687 					struct ieee80211_vif *vif,
2688 					bool low_latency,
2689 					enum nl80211_band band)
2690 {
2691 	struct iwl_mvm_scan_respect_p2p_go_iter_data data = {
2692 		.current_vif = vif,
2693 		.p2p_go = false,
2694 		.band = band,
2695 	};
2696 
2697 	if (!low_latency)
2698 		return false;
2699 
2700 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
2701 						   IEEE80211_IFACE_ITER_NORMAL,
2702 						   iwl_mvm_scan_respect_p2p_go_iter,
2703 						   &data);
2704 
2705 	return data.p2p_go;
2706 }
2707 
iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum nl80211_band band)2708 static bool iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm *mvm,
2709 					    struct ieee80211_vif *vif,
2710 					    enum nl80211_band band)
2711 {
2712 	bool low_latency = iwl_mvm_low_latency_band(mvm, band);
2713 
2714 	return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency, band);
2715 }
2716 
iwl_mvm_get_respect_p2p_go(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2717 static bool iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2718 				       struct ieee80211_vif *vif)
2719 {
2720 	bool low_latency = iwl_mvm_low_latency(mvm);
2721 
2722 	return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency,
2723 					   NUM_NL80211_BANDS);
2724 }
2725 
iwl_mvm_fill_respect_p2p_go(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2726 static void iwl_mvm_fill_respect_p2p_go(struct iwl_mvm *mvm,
2727 					struct iwl_mvm_scan_params *params,
2728 					struct ieee80211_vif *vif)
2729 {
2730 	if (iwl_mvm_is_cdb_supported(mvm)) {
2731 		params->respect_p2p_go =
2732 			iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2733 							NL80211_BAND_2GHZ);
2734 		params->respect_p2p_go_hb =
2735 			iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2736 							NL80211_BAND_5GHZ);
2737 	} else {
2738 		params->respect_p2p_go = iwl_mvm_get_respect_p2p_go(mvm, vif);
2739 	}
2740 }
2741 
iwl_mvm_reg_scan_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_scan_request * req,struct ieee80211_scan_ies * ies)2742 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2743 			   struct cfg80211_scan_request *req,
2744 			   struct ieee80211_scan_ies *ies)
2745 {
2746 	struct iwl_host_cmd hcmd = {
2747 		.len = { iwl_mvm_scan_size(mvm), },
2748 		.data = { mvm->scan_cmd, },
2749 		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
2750 	};
2751 	struct iwl_mvm_scan_params params = {};
2752 	int ret, uid;
2753 	struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
2754 
2755 	lockdep_assert_held(&mvm->mutex);
2756 
2757 	if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2758 		IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
2759 		return -EBUSY;
2760 	}
2761 
2762 	ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
2763 	if (ret)
2764 		return ret;
2765 
2766 	/* we should have failed registration if scan_cmd was NULL */
2767 	if (WARN_ON(!mvm->scan_cmd))
2768 		return -ENOMEM;
2769 
2770 	if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
2771 		return -ENOBUFS;
2772 
2773 	params.n_ssids = req->n_ssids;
2774 	params.flags = req->flags;
2775 	params.n_channels = req->n_channels;
2776 	params.delay = 0;
2777 	params.ssids = req->ssids;
2778 	params.channels = req->channels;
2779 	params.mac_addr = req->mac_addr;
2780 	params.mac_addr_mask = req->mac_addr_mask;
2781 	params.no_cck = req->no_cck;
2782 	params.pass_all = true;
2783 	params.n_match_sets = 0;
2784 	params.match_sets = NULL;
2785 
2786 	params.scan_plans = &scan_plan;
2787 	params.n_scan_plans = 1;
2788 
2789 	params.n_6ghz_params = req->n_6ghz_params;
2790 	params.scan_6ghz_params = req->scan_6ghz_params;
2791 	params.scan_6ghz = req->scan_6ghz;
2792 	iwl_mvm_fill_scan_type(mvm, &params, vif);
2793 	iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
2794 
2795 	if (req->duration)
2796 		params.iter_notif = true;
2797 
2798 	iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
2799 
2800 	iwl_mvm_scan_6ghz_passive_scan(mvm, &params, vif);
2801 
2802 	uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params,
2803 				     IWL_MVM_SCAN_REGULAR);
2804 
2805 	if (uid < 0)
2806 		return uid;
2807 
2808 	iwl_mvm_pause_tcm(mvm, false);
2809 
2810 	ret = iwl_mvm_send_cmd(mvm, &hcmd);
2811 	if (ret) {
2812 		/* If the scan failed, it usually means that the FW was unable
2813 		 * to allocate the time events. Warn on it, but maybe we
2814 		 * should try to send the command again with different params.
2815 		 */
2816 		IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
2817 		iwl_mvm_resume_tcm(mvm);
2818 		mvm->scan_uid_status[uid] = 0;
2819 		return ret;
2820 	}
2821 
2822 	IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
2823 	mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
2824 	mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
2825 
2826 	if (params.enable_6ghz_passive)
2827 		mvm->last_6ghz_passive_scan_jiffies = jiffies;
2828 
2829 	schedule_delayed_work(&mvm->scan_timeout_dwork,
2830 			      msecs_to_jiffies(SCAN_TIMEOUT));
2831 
2832 	return 0;
2833 }
2834 
iwl_mvm_sched_scan_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_sched_scan_request * req,struct ieee80211_scan_ies * ies,int type)2835 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
2836 			     struct ieee80211_vif *vif,
2837 			     struct cfg80211_sched_scan_request *req,
2838 			     struct ieee80211_scan_ies *ies,
2839 			     int type)
2840 {
2841 	struct iwl_host_cmd hcmd = {
2842 		.len = { iwl_mvm_scan_size(mvm), },
2843 		.data = { mvm->scan_cmd, },
2844 		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
2845 	};
2846 	struct iwl_mvm_scan_params params = {};
2847 	int ret, uid;
2848 	int i, j;
2849 	bool non_psc_included = false;
2850 
2851 	lockdep_assert_held(&mvm->mutex);
2852 
2853 	if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2854 		IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
2855 		return -EBUSY;
2856 	}
2857 
2858 	ret = iwl_mvm_check_running_scans(mvm, type);
2859 	if (ret)
2860 		return ret;
2861 
2862 	/* we should have failed registration if scan_cmd was NULL */
2863 	if (WARN_ON(!mvm->scan_cmd))
2864 		return -ENOMEM;
2865 
2866 
2867 	params.n_ssids = req->n_ssids;
2868 	params.flags = req->flags;
2869 	params.n_channels = req->n_channels;
2870 	params.ssids = req->ssids;
2871 	params.channels = req->channels;
2872 	params.mac_addr = req->mac_addr;
2873 	params.mac_addr_mask = req->mac_addr_mask;
2874 	params.no_cck = false;
2875 	params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
2876 	params.n_match_sets = req->n_match_sets;
2877 	params.match_sets = req->match_sets;
2878 	if (!req->n_scan_plans)
2879 		return -EINVAL;
2880 
2881 	params.n_scan_plans = req->n_scan_plans;
2882 	params.scan_plans = req->scan_plans;
2883 
2884 	iwl_mvm_fill_scan_type(mvm, &params, vif);
2885 	iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
2886 
2887 	/* In theory, LMAC scans can handle a 32-bit delay, but since
2888 	 * waiting for over 18 hours to start the scan is a bit silly
2889 	 * and to keep it aligned with UMAC scans (which only support
2890 	 * 16-bit delays), trim it down to 16-bits.
2891 	 */
2892 	if (req->delay > U16_MAX) {
2893 		IWL_DEBUG_SCAN(mvm,
2894 			       "delay value is > 16-bits, set to max possible\n");
2895 		params.delay = U16_MAX;
2896 	} else {
2897 		params.delay = req->delay;
2898 	}
2899 
2900 	ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2901 	if (ret)
2902 		return ret;
2903 
2904 	iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
2905 
2906 	/* for 6 GHZ band only PSC channels need to be added */
2907 	for (i = 0; i < params.n_channels; i++) {
2908 		struct ieee80211_channel *channel = params.channels[i];
2909 
2910 		if (channel->band == NL80211_BAND_6GHZ &&
2911 		    !cfg80211_channel_is_psc(channel)) {
2912 			non_psc_included = true;
2913 			break;
2914 		}
2915 	}
2916 
2917 	if (non_psc_included) {
2918 		params.channels = kmemdup(params.channels,
2919 					  sizeof(params.channels[0]) *
2920 					  params.n_channels,
2921 					  GFP_KERNEL);
2922 		if (!params.channels)
2923 			return -ENOMEM;
2924 
2925 		for (i = j = 0; i < params.n_channels; i++) {
2926 			if (params.channels[i]->band == NL80211_BAND_6GHZ &&
2927 			    !cfg80211_channel_is_psc(params.channels[i]))
2928 				continue;
2929 			params.channels[j++] = params.channels[i];
2930 		}
2931 		params.n_channels = j;
2932 	}
2933 
2934 	if (non_psc_included &&
2935 	    !iwl_mvm_scan_fits(mvm, req->n_ssids, ies, params.n_channels)) {
2936 		kfree(params.channels);
2937 		return -ENOBUFS;
2938 	}
2939 
2940 	uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params, type);
2941 
2942 	if (non_psc_included)
2943 		kfree(params.channels);
2944 	if (uid < 0)
2945 		return uid;
2946 
2947 	ret = iwl_mvm_send_cmd(mvm, &hcmd);
2948 	if (!ret) {
2949 		IWL_DEBUG_SCAN(mvm,
2950 			       "Sched scan request was sent successfully\n");
2951 		mvm->scan_status |= type;
2952 	} else {
2953 		/* If the scan failed, it usually means that the FW was unable
2954 		 * to allocate the time events. Warn on it, but maybe we
2955 		 * should try to send the command again with different params.
2956 		 */
2957 		IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
2958 		mvm->scan_uid_status[uid] = 0;
2959 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
2960 	}
2961 
2962 	return ret;
2963 }
2964 
iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)2965 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
2966 					 struct iwl_rx_cmd_buffer *rxb)
2967 {
2968 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
2969 	struct iwl_umac_scan_complete *notif = (void *)pkt->data;
2970 	u32 uid = __le32_to_cpu(notif->uid);
2971 	bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
2972 
2973 	if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
2974 		return;
2975 
2976 	/* if the scan is already stopping, we don't need to notify mac80211 */
2977 	if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
2978 		struct cfg80211_scan_info info = {
2979 			.aborted = aborted,
2980 			.scan_start_tsf = mvm->scan_start,
2981 		};
2982 
2983 		memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN);
2984 		ieee80211_scan_completed(mvm->hw, &info);
2985 		mvm->scan_vif = NULL;
2986 		cancel_delayed_work(&mvm->scan_timeout_dwork);
2987 		iwl_mvm_resume_tcm(mvm);
2988 	} else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
2989 		ieee80211_sched_scan_stopped(mvm->hw);
2990 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
2991 	}
2992 
2993 	mvm->scan_status &= ~mvm->scan_uid_status[uid];
2994 	IWL_DEBUG_SCAN(mvm,
2995 		       "Scan completed, uid %u type %u, status %s, EBS status %s\n",
2996 		       uid, mvm->scan_uid_status[uid],
2997 		       notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
2998 				"completed" : "aborted",
2999 		       iwl_mvm_ebs_status_str(notif->ebs_status));
3000 	IWL_DEBUG_SCAN(mvm,
3001 		       "Last line %d, Last iteration %d, Time from last iteration %d\n",
3002 		       notif->last_schedule, notif->last_iter,
3003 		       __le32_to_cpu(notif->time_from_last_iter));
3004 
3005 	if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
3006 	    notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
3007 		mvm->last_ebs_successful = false;
3008 
3009 	mvm->scan_uid_status[uid] = 0;
3010 }
3011 
iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3012 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
3013 					      struct iwl_rx_cmd_buffer *rxb)
3014 {
3015 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
3016 	struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
3017 
3018 	mvm->scan_start = le64_to_cpu(notif->start_tsf);
3019 
3020 	IWL_DEBUG_SCAN(mvm,
3021 		       "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
3022 		       notif->status, notif->scanned_channels);
3023 
3024 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
3025 		IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
3026 		ieee80211_sched_scan_results(mvm->hw);
3027 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
3028 	}
3029 
3030 	IWL_DEBUG_SCAN(mvm,
3031 		       "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
3032 		       mvm->scan_start);
3033 }
3034 
iwl_mvm_umac_scan_abort(struct iwl_mvm * mvm,int type)3035 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
3036 {
3037 	struct iwl_umac_scan_abort cmd = {};
3038 	int uid, ret;
3039 
3040 	lockdep_assert_held(&mvm->mutex);
3041 
3042 	/* We should always get a valid index here, because we already
3043 	 * checked that this type of scan was running in the generic
3044 	 * code.
3045 	 */
3046 	uid = iwl_mvm_scan_uid_by_status(mvm, type);
3047 	if (WARN_ON_ONCE(uid < 0))
3048 		return uid;
3049 
3050 	cmd.uid = cpu_to_le32(uid);
3051 
3052 	IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
3053 
3054 	ret = iwl_mvm_send_cmd_pdu(mvm,
3055 				   WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_ABORT_UMAC),
3056 				   0, sizeof(cmd), &cmd);
3057 	if (!ret)
3058 		mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
3059 
3060 	return ret;
3061 }
3062 
iwl_mvm_scan_stop_wait(struct iwl_mvm * mvm,int type)3063 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
3064 {
3065 	struct iwl_notification_wait wait_scan_done;
3066 	static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
3067 					      SCAN_OFFLOAD_COMPLETE, };
3068 	int ret;
3069 
3070 	lockdep_assert_held(&mvm->mutex);
3071 
3072 	iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
3073 				   scan_done_notif,
3074 				   ARRAY_SIZE(scan_done_notif),
3075 				   NULL, NULL);
3076 
3077 	IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
3078 
3079 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
3080 		ret = iwl_mvm_umac_scan_abort(mvm, type);
3081 	else
3082 		ret = iwl_mvm_lmac_scan_abort(mvm);
3083 
3084 	if (ret) {
3085 		IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
3086 		iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
3087 		return ret;
3088 	}
3089 
3090 	return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done,
3091 				     1 * HZ);
3092 }
3093 
iwl_scan_req_umac_get_size(u8 scan_ver)3094 static size_t iwl_scan_req_umac_get_size(u8 scan_ver)
3095 {
3096 	switch (scan_ver) {
3097 	case 12:
3098 		return sizeof(struct iwl_scan_req_umac_v12);
3099 	case 14:
3100 	case 15:
3101 		return sizeof(struct iwl_scan_req_umac_v15);
3102 	}
3103 
3104 	return 0;
3105 }
3106 
iwl_mvm_scan_size(struct iwl_mvm * mvm)3107 size_t iwl_mvm_scan_size(struct iwl_mvm *mvm)
3108 {
3109 	int base_size, tail_size;
3110 	u8 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
3111 					    IWL_FW_CMD_VER_UNKNOWN);
3112 
3113 	base_size = iwl_scan_req_umac_get_size(scan_ver);
3114 	if (base_size)
3115 		return base_size;
3116 
3117 
3118 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
3119 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
3120 	else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
3121 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
3122 	else if (iwl_mvm_cdb_scan_api(mvm))
3123 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
3124 	else
3125 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
3126 
3127 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3128 		if (iwl_mvm_is_scan_ext_chan_supported(mvm))
3129 			tail_size = sizeof(struct iwl_scan_req_umac_tail_v2);
3130 		else
3131 			tail_size = sizeof(struct iwl_scan_req_umac_tail_v1);
3132 
3133 		return base_size +
3134 			sizeof(struct iwl_scan_channel_cfg_umac) *
3135 				mvm->fw->ucode_capa.n_scan_channels +
3136 			tail_size;
3137 	}
3138 	return sizeof(struct iwl_scan_req_lmac) +
3139 		sizeof(struct iwl_scan_channel_cfg_lmac) *
3140 		mvm->fw->ucode_capa.n_scan_channels +
3141 		sizeof(struct iwl_scan_probe_req_v1);
3142 }
3143 
3144 /*
3145  * This function is used in nic restart flow, to inform mac80211 about scans
3146  * that was aborted by restart flow or by an assert.
3147  */
iwl_mvm_report_scan_aborted(struct iwl_mvm * mvm)3148 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
3149 {
3150 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3151 		int uid, i;
3152 
3153 		uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
3154 		if (uid >= 0) {
3155 			struct cfg80211_scan_info info = {
3156 				.aborted = true,
3157 			};
3158 
3159 			cancel_delayed_work(&mvm->scan_timeout_dwork);
3160 
3161 			ieee80211_scan_completed(mvm->hw, &info);
3162 			mvm->scan_uid_status[uid] = 0;
3163 		}
3164 		uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
3165 		if (uid >= 0) {
3166 			/* Sched scan will be restarted by mac80211 in
3167 			 * restart_hw, so do not report if FW is about to be
3168 			 * restarted.
3169 			 */
3170 			if (!mvm->fw_restart)
3171 				ieee80211_sched_scan_stopped(mvm->hw);
3172 			mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3173 			mvm->scan_uid_status[uid] = 0;
3174 		}
3175 		uid = iwl_mvm_scan_uid_by_status(mvm,
3176 						 IWL_MVM_SCAN_STOPPING_REGULAR);
3177 		if (uid >= 0)
3178 			mvm->scan_uid_status[uid] = 0;
3179 
3180 		uid = iwl_mvm_scan_uid_by_status(mvm,
3181 						 IWL_MVM_SCAN_STOPPING_SCHED);
3182 		if (uid >= 0)
3183 			mvm->scan_uid_status[uid] = 0;
3184 
3185 		/* We shouldn't have any UIDs still set.  Loop over all the
3186 		 * UIDs to make sure there's nothing left there and warn if
3187 		 * any is found.
3188 		 */
3189 		for (i = 0; i < mvm->max_scans; i++) {
3190 			if (WARN_ONCE(mvm->scan_uid_status[i],
3191 				      "UMAC scan UID %d status was not cleaned\n",
3192 				      i))
3193 				mvm->scan_uid_status[i] = 0;
3194 		}
3195 	} else {
3196 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
3197 			struct cfg80211_scan_info info = {
3198 				.aborted = true,
3199 			};
3200 
3201 			cancel_delayed_work(&mvm->scan_timeout_dwork);
3202 			ieee80211_scan_completed(mvm->hw, &info);
3203 		}
3204 
3205 		/* Sched scan will be restarted by mac80211 in
3206 		 * restart_hw, so do not report if FW is about to be
3207 		 * restarted.
3208 		 */
3209 		if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
3210 		    !mvm->fw_restart) {
3211 			ieee80211_sched_scan_stopped(mvm->hw);
3212 			mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3213 		}
3214 	}
3215 }
3216 
iwl_mvm_scan_stop(struct iwl_mvm * mvm,int type,bool notify)3217 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
3218 {
3219 	int ret;
3220 
3221 	if (!(mvm->scan_status & type))
3222 		return 0;
3223 
3224 	if (iwl_mvm_is_radio_killed(mvm)) {
3225 		ret = 0;
3226 		goto out;
3227 	}
3228 
3229 	ret = iwl_mvm_scan_stop_wait(mvm, type);
3230 	if (!ret)
3231 		mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
3232 out:
3233 	/* Clear the scan status so the next scan requests will
3234 	 * succeed and mark the scan as stopping, so that the Rx
3235 	 * handler doesn't do anything, as the scan was stopped from
3236 	 * above.
3237 	 */
3238 	mvm->scan_status &= ~type;
3239 
3240 	if (type == IWL_MVM_SCAN_REGULAR) {
3241 		cancel_delayed_work(&mvm->scan_timeout_dwork);
3242 		if (notify) {
3243 			struct cfg80211_scan_info info = {
3244 				.aborted = true,
3245 			};
3246 
3247 			ieee80211_scan_completed(mvm->hw, &info);
3248 		}
3249 	} else if (notify) {
3250 		ieee80211_sched_scan_stopped(mvm->hw);
3251 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3252 	}
3253 
3254 	return ret;
3255 }
3256