1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3  * Copyright (C) 2012-2014, 2018-2023 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 /* Number of iterations on the channel for mei filtered scan */
49 #define IWL_MEI_SCAN_NUM_ITER	5U
50 
51 struct iwl_mvm_scan_timing_params {
52 	u32 suspend_time;
53 	u32 max_out_time;
54 };
55 
56 static struct iwl_mvm_scan_timing_params scan_timing[] = {
57 	[IWL_SCAN_TYPE_UNASSOC] = {
58 		.suspend_time = 0,
59 		.max_out_time = 0,
60 	},
61 	[IWL_SCAN_TYPE_WILD] = {
62 		.suspend_time = 30,
63 		.max_out_time = 120,
64 	},
65 	[IWL_SCAN_TYPE_MILD] = {
66 		.suspend_time = 120,
67 		.max_out_time = 120,
68 	},
69 	[IWL_SCAN_TYPE_FRAGMENTED] = {
70 		.suspend_time = 95,
71 		.max_out_time = 44,
72 	},
73 	[IWL_SCAN_TYPE_FAST_BALANCE] = {
74 		.suspend_time = 30,
75 		.max_out_time = 37,
76 	},
77 };
78 
79 struct iwl_mvm_scan_params {
80 	/* For CDB this is low band scan type, for non-CDB - type. */
81 	enum iwl_mvm_scan_type type;
82 	enum iwl_mvm_scan_type hb_type;
83 	u32 n_channels;
84 	u16 delay;
85 	int n_ssids;
86 	struct cfg80211_ssid *ssids;
87 	struct ieee80211_channel **channels;
88 	u32 flags;
89 	u8 *mac_addr;
90 	u8 *mac_addr_mask;
91 	bool no_cck;
92 	bool pass_all;
93 	int n_match_sets;
94 	struct iwl_scan_probe_req preq;
95 	struct cfg80211_match_set *match_sets;
96 	int n_scan_plans;
97 	struct cfg80211_sched_scan_plan *scan_plans;
98 	bool iter_notif;
99 	struct cfg80211_scan_6ghz_params *scan_6ghz_params;
100 	u32 n_6ghz_params;
101 	bool scan_6ghz;
102 	bool enable_6ghz_passive;
103 	bool respect_p2p_go, respect_p2p_go_hb;
104 	u8 bssid[ETH_ALEN] __aligned(2);
105 };
106 
iwl_mvm_get_scan_req_umac_data(struct iwl_mvm * mvm)107 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
108 {
109 	struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
110 
111 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
112 		return (void *)&cmd->v8.data;
113 
114 	if (iwl_mvm_is_adaptive_dwell_supported(mvm))
115 		return (void *)&cmd->v7.data;
116 
117 	if (iwl_mvm_cdb_scan_api(mvm))
118 		return (void *)&cmd->v6.data;
119 
120 	return (void *)&cmd->v1.data;
121 }
122 
123 static inline struct iwl_scan_umac_chan_param *
iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm * mvm)124 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm)
125 {
126 	struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
127 
128 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
129 		return &cmd->v8.channel;
130 
131 	if (iwl_mvm_is_adaptive_dwell_supported(mvm))
132 		return &cmd->v7.channel;
133 
134 	if (iwl_mvm_cdb_scan_api(mvm))
135 		return &cmd->v6.channel;
136 
137 	return &cmd->v1.channel;
138 }
139 
iwl_mvm_scan_rx_ant(struct iwl_mvm * mvm)140 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
141 {
142 	if (mvm->scan_rx_ant != ANT_NONE)
143 		return mvm->scan_rx_ant;
144 	return iwl_mvm_get_valid_rx_ant(mvm);
145 }
146 
iwl_mvm_scan_rx_chain(struct iwl_mvm * mvm)147 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
148 {
149 	u16 rx_chain;
150 	u8 rx_ant;
151 
152 	rx_ant = iwl_mvm_scan_rx_ant(mvm);
153 	rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
154 	rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
155 	rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
156 	rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
157 	return cpu_to_le16(rx_chain);
158 }
159 
160 static inline __le32
iwl_mvm_scan_rate_n_flags(struct iwl_mvm * mvm,enum nl80211_band band,bool no_cck)161 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
162 			  bool no_cck)
163 {
164 	u32 tx_ant;
165 
166 	iwl_mvm_toggle_tx_ant(mvm, &mvm->scan_last_antenna_idx);
167 	tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
168 
169 	if (band == NL80211_BAND_2GHZ && !no_cck)
170 		return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK_V1 |
171 				   tx_ant);
172 	else
173 		return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
174 }
175 
iwl_mvm_get_traffic_load(struct iwl_mvm * mvm)176 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
177 {
178 	return mvm->tcm.result.global_load;
179 }
180 
181 static enum iwl_mvm_traffic_load
iwl_mvm_get_traffic_load_band(struct iwl_mvm * mvm,enum nl80211_band band)182 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band)
183 {
184 	return mvm->tcm.result.band_load[band];
185 }
186 
187 struct iwl_mvm_scan_iter_data {
188 	u32 global_cnt;
189 	struct ieee80211_vif *current_vif;
190 	bool is_dcm_with_p2p_go;
191 };
192 
iwl_mvm_scan_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)193 static void iwl_mvm_scan_iterator(void *_data, u8 *mac,
194 				  struct ieee80211_vif *vif)
195 {
196 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
197 	struct iwl_mvm_scan_iter_data *data = _data;
198 	struct iwl_mvm_vif *curr_mvmvif;
199 
200 	if (vif->type != NL80211_IFTYPE_P2P_DEVICE &&
201 	    mvmvif->deflink.phy_ctxt &&
202 	    mvmvif->deflink.phy_ctxt->id < NUM_PHY_CTX)
203 		data->global_cnt += 1;
204 
205 	if (!data->current_vif || vif == data->current_vif)
206 		return;
207 
208 	curr_mvmvif = iwl_mvm_vif_from_mac80211(data->current_vif);
209 
210 	if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
211 	    mvmvif->deflink.phy_ctxt && curr_mvmvif->deflink.phy_ctxt &&
212 	    mvmvif->deflink.phy_ctxt->id != curr_mvmvif->deflink.phy_ctxt->id)
213 		data->is_dcm_with_p2p_go = true;
214 }
215 
216 static enum
_iwl_mvm_get_scan_type(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum iwl_mvm_traffic_load load,bool low_latency)217 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
218 					 struct ieee80211_vif *vif,
219 					 enum iwl_mvm_traffic_load load,
220 					 bool low_latency)
221 {
222 	struct iwl_mvm_scan_iter_data data = {
223 		.current_vif = vif,
224 		.is_dcm_with_p2p_go = false,
225 		.global_cnt = 0,
226 	};
227 
228 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
229 						   IEEE80211_IFACE_ITER_NORMAL,
230 						   iwl_mvm_scan_iterator,
231 						   &data);
232 
233 	if (!data.global_cnt)
234 		return IWL_SCAN_TYPE_UNASSOC;
235 
236 	if (fw_has_api(&mvm->fw->ucode_capa,
237 		       IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
238 		if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
239 		    (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE))
240 			return IWL_SCAN_TYPE_FRAGMENTED;
241 
242 		/*
243 		 * in case of DCM with GO where BSS DTIM interval < 220msec
244 		 * set all scan requests as fast-balance scan
245 		 */
246 		if (vif && vif->type == NL80211_IFTYPE_STATION &&
247 		    data.is_dcm_with_p2p_go &&
248 		    ((vif->bss_conf.beacon_int *
249 		      vif->bss_conf.dtim_period) < 220))
250 			return IWL_SCAN_TYPE_FAST_BALANCE;
251 	}
252 
253 	if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
254 		return IWL_SCAN_TYPE_MILD;
255 
256 	return IWL_SCAN_TYPE_WILD;
257 }
258 
259 static enum
iwl_mvm_get_scan_type(struct iwl_mvm * mvm,struct ieee80211_vif * vif)260 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
261 					struct ieee80211_vif *vif)
262 {
263 	enum iwl_mvm_traffic_load load;
264 	bool low_latency;
265 
266 	load = iwl_mvm_get_traffic_load(mvm);
267 	low_latency = iwl_mvm_low_latency(mvm);
268 
269 	return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
270 }
271 
272 static enum
iwl_mvm_get_scan_type_band(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum nl80211_band band)273 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm,
274 					     struct ieee80211_vif *vif,
275 					     enum nl80211_band band)
276 {
277 	enum iwl_mvm_traffic_load load;
278 	bool low_latency;
279 
280 	load = iwl_mvm_get_traffic_load_band(mvm, band);
281 	low_latency = iwl_mvm_low_latency_band(mvm, band);
282 
283 	return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
284 }
285 
iwl_mvm_rrm_scan_needed(struct iwl_mvm * mvm)286 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
287 {
288 	/* require rrm scan whenever the fw supports it */
289 	return fw_has_capa(&mvm->fw->ucode_capa,
290 			   IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
291 }
292 
iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm * mvm)293 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
294 {
295 	int max_probe_len;
296 
297 	max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
298 
299 	/* we create the 802.11 header and SSID element */
300 	max_probe_len -= 24 + 2;
301 
302 	/* DS parameter set element is added on 2.4GHZ band if required */
303 	if (iwl_mvm_rrm_scan_needed(mvm))
304 		max_probe_len -= 3;
305 
306 	return max_probe_len;
307 }
308 
iwl_mvm_max_scan_ie_len(struct iwl_mvm * mvm)309 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
310 {
311 	int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
312 
313 	/* TODO: [BUG] This function should return the maximum allowed size of
314 	 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
315 	 * in the same command. So the correct implementation of this function
316 	 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
317 	 * command has only 512 bytes and it would leave us with about 240
318 	 * bytes for scan IEs, which is clearly not enough. So meanwhile
319 	 * we will report an incorrect value. This may result in a failure to
320 	 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
321 	 * functions with -ENOBUFS, if a large enough probe will be provided.
322 	 */
323 	return max_ie_len;
324 }
325 
iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)326 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
327 					      struct iwl_rx_cmd_buffer *rxb)
328 {
329 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
330 	struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
331 
332 	IWL_DEBUG_SCAN(mvm,
333 		       "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
334 		       notif->status, notif->scanned_channels);
335 
336 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
337 		IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
338 		ieee80211_sched_scan_results(mvm->hw);
339 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
340 	}
341 }
342 
iwl_mvm_rx_scan_match_found(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)343 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
344 				 struct iwl_rx_cmd_buffer *rxb)
345 {
346 	IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
347 	ieee80211_sched_scan_results(mvm->hw);
348 }
349 
iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)350 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
351 {
352 	switch (status) {
353 	case IWL_SCAN_EBS_SUCCESS:
354 		return "successful";
355 	case IWL_SCAN_EBS_INACTIVE:
356 		return "inactive";
357 	case IWL_SCAN_EBS_FAILED:
358 	case IWL_SCAN_EBS_CHAN_NOT_FOUND:
359 	default:
360 		return "failed";
361 	}
362 }
363 
iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)364 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
365 					 struct iwl_rx_cmd_buffer *rxb)
366 {
367 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
368 	struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
369 	bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
370 
371 	/* If this happens, the firmware has mistakenly sent an LMAC
372 	 * notification during UMAC scans -- warn and ignore it.
373 	 */
374 	if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
375 				     IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
376 		return;
377 
378 	/* scan status must be locked for proper checking */
379 	lockdep_assert_held(&mvm->mutex);
380 
381 	/* We first check if we were stopping a scan, in which case we
382 	 * just clear the stopping flag.  Then we check if it was a
383 	 * firmware initiated stop, in which case we need to inform
384 	 * mac80211.
385 	 * Note that we can have a stopping and a running scan
386 	 * simultaneously, but we can't have two different types of
387 	 * scans stopping or running at the same time (since LMAC
388 	 * doesn't support it).
389 	 */
390 
391 	if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
392 		WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
393 
394 		IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
395 			       aborted ? "aborted" : "completed",
396 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
397 		IWL_DEBUG_SCAN(mvm,
398 			       "Last line %d, Last iteration %d, Time after last iteration %d\n",
399 			       scan_notif->last_schedule_line,
400 			       scan_notif->last_schedule_iteration,
401 			       __le32_to_cpu(scan_notif->time_after_last_iter));
402 
403 		mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
404 	} else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
405 		IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
406 			       aborted ? "aborted" : "completed",
407 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
408 
409 		mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
410 	} else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
411 		WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
412 
413 		IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
414 			       aborted ? "aborted" : "completed",
415 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
416 		IWL_DEBUG_SCAN(mvm,
417 			       "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
418 			       scan_notif->last_schedule_line,
419 			       scan_notif->last_schedule_iteration,
420 			       __le32_to_cpu(scan_notif->time_after_last_iter));
421 
422 		mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
423 		ieee80211_sched_scan_stopped(mvm->hw);
424 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
425 	} else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
426 		struct cfg80211_scan_info info = {
427 			.aborted = aborted,
428 		};
429 
430 		IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
431 			       aborted ? "aborted" : "completed",
432 			       iwl_mvm_ebs_status_str(scan_notif->ebs_status));
433 
434 		mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
435 		ieee80211_scan_completed(mvm->hw, &info);
436 		cancel_delayed_work(&mvm->scan_timeout_dwork);
437 		iwl_mvm_resume_tcm(mvm);
438 	} else {
439 		IWL_ERR(mvm,
440 			"got scan complete notification but no scan is running\n");
441 	}
442 
443 	mvm->last_ebs_successful =
444 			scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
445 			scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
446 }
447 
iwl_ssid_exist(u8 * ssid,u8 ssid_len,struct iwl_ssid_ie * ssid_list)448 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
449 {
450 	int i;
451 
452 	for (i = 0; i < PROBE_OPTION_MAX; i++) {
453 		if (!ssid_list[i].len)
454 			break;
455 		if (ssid_list[i].len == ssid_len &&
456 		    !memcmp(ssid_list->ssid, ssid, ssid_len))
457 			return i;
458 	}
459 	return -1;
460 }
461 
462 /* We insert the SSIDs in an inverted order, because the FW will
463  * invert it back.
464  */
iwl_scan_build_ssids(struct iwl_mvm_scan_params * params,struct iwl_ssid_ie * ssids,u32 * ssid_bitmap)465 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
466 				 struct iwl_ssid_ie *ssids,
467 				 u32 *ssid_bitmap)
468 {
469 	int i, j;
470 	int index;
471 	u32 tmp_bitmap = 0;
472 
473 	/*
474 	 * copy SSIDs from match list.
475 	 * iwl_config_sched_scan_profiles() uses the order of these ssids to
476 	 * config match list.
477 	 */
478 	for (i = 0, j = params->n_match_sets - 1;
479 	     j >= 0 && i < PROBE_OPTION_MAX;
480 	     i++, j--) {
481 		/* skip empty SSID matchsets */
482 		if (!params->match_sets[j].ssid.ssid_len)
483 			continue;
484 		ssids[i].id = WLAN_EID_SSID;
485 		ssids[i].len = params->match_sets[j].ssid.ssid_len;
486 		memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
487 		       ssids[i].len);
488 	}
489 
490 	/* add SSIDs from scan SSID list */
491 	for (j = params->n_ssids - 1;
492 	     j >= 0 && i < PROBE_OPTION_MAX;
493 	     i++, j--) {
494 		index = iwl_ssid_exist(params->ssids[j].ssid,
495 				       params->ssids[j].ssid_len,
496 				       ssids);
497 		if (index < 0) {
498 			ssids[i].id = WLAN_EID_SSID;
499 			ssids[i].len = params->ssids[j].ssid_len;
500 			memcpy(ssids[i].ssid, params->ssids[j].ssid,
501 			       ssids[i].len);
502 			tmp_bitmap |= BIT(i);
503 		} else {
504 			tmp_bitmap |= BIT(index);
505 		}
506 	}
507 	if (ssid_bitmap)
508 		*ssid_bitmap = tmp_bitmap;
509 }
510 
511 static int
iwl_mvm_config_sched_scan_profiles(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)512 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
513 				   struct cfg80211_sched_scan_request *req)
514 {
515 	struct iwl_scan_offload_profile *profile;
516 	struct iwl_scan_offload_profile_cfg_v1 *profile_cfg_v1;
517 	struct iwl_scan_offload_blocklist *blocklist;
518 	struct iwl_scan_offload_profile_cfg_data *data;
519 	int max_profiles = iwl_umac_scan_get_max_profiles(mvm->fw);
520 	int profile_cfg_size = sizeof(*data) +
521 		sizeof(*profile) * max_profiles;
522 	struct iwl_host_cmd cmd = {
523 		.id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
524 		.len[1] = profile_cfg_size,
525 		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
526 		.dataflags[1] = IWL_HCMD_DFL_NOCOPY,
527 	};
528 	int blocklist_len;
529 	int i;
530 	int ret;
531 
532 	if (WARN_ON(req->n_match_sets > max_profiles))
533 		return -EIO;
534 
535 	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
536 		blocklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
537 	else
538 		blocklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
539 
540 	blocklist = kcalloc(blocklist_len, sizeof(*blocklist), GFP_KERNEL);
541 	if (!blocklist)
542 		return -ENOMEM;
543 
544 	profile_cfg_v1 = kzalloc(profile_cfg_size, GFP_KERNEL);
545 	if (!profile_cfg_v1) {
546 		ret = -ENOMEM;
547 		goto free_blocklist;
548 	}
549 
550 	cmd.data[0] = blocklist;
551 	cmd.len[0] = sizeof(*blocklist) * blocklist_len;
552 	cmd.data[1] = profile_cfg_v1;
553 
554 	/* if max_profile is MAX_PROFILES_V2, we have the new API */
555 	if (max_profiles == IWL_SCAN_MAX_PROFILES_V2) {
556 		struct iwl_scan_offload_profile_cfg *profile_cfg =
557 			(struct iwl_scan_offload_profile_cfg *)profile_cfg_v1;
558 
559 		data = &profile_cfg->data;
560 	} else {
561 		data = &profile_cfg_v1->data;
562 	}
563 
564 	/* No blocklist configuration */
565 	data->num_profiles = req->n_match_sets;
566 	data->active_clients = SCAN_CLIENT_SCHED_SCAN;
567 	data->pass_match = SCAN_CLIENT_SCHED_SCAN;
568 	data->match_notify = SCAN_CLIENT_SCHED_SCAN;
569 
570 	if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
571 		data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
572 
573 	for (i = 0; i < req->n_match_sets; i++) {
574 		profile = &profile_cfg_v1->profiles[i];
575 		profile->ssid_index = i;
576 		/* Support any cipher and auth algorithm */
577 		profile->unicast_cipher = 0xff;
578 		profile->auth_alg = IWL_AUTH_ALGO_UNSUPPORTED |
579 			IWL_AUTH_ALGO_NONE | IWL_AUTH_ALGO_PSK | IWL_AUTH_ALGO_8021X |
580 			IWL_AUTH_ALGO_SAE | IWL_AUTH_ALGO_8021X_SHA384 | IWL_AUTH_ALGO_OWE;
581 		profile->network_type = IWL_NETWORK_TYPE_ANY;
582 		profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
583 		profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
584 	}
585 
586 	IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
587 
588 	ret = iwl_mvm_send_cmd(mvm, &cmd);
589 	kfree(profile_cfg_v1);
590 free_blocklist:
591 	kfree(blocklist);
592 
593 	return ret;
594 }
595 
iwl_mvm_scan_pass_all(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)596 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
597 				  struct cfg80211_sched_scan_request *req)
598 {
599 	if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
600 		IWL_DEBUG_SCAN(mvm,
601 			       "Sending scheduled scan with filtering, n_match_sets %d\n",
602 			       req->n_match_sets);
603 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
604 		return false;
605 	}
606 
607 	IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
608 
609 	mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
610 	return true;
611 }
612 
iwl_mvm_lmac_scan_abort(struct iwl_mvm * mvm)613 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
614 {
615 	int ret;
616 	struct iwl_host_cmd cmd = {
617 		.id = SCAN_OFFLOAD_ABORT_CMD,
618 	};
619 	u32 status = CAN_ABORT_STATUS;
620 
621 	ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
622 	if (ret)
623 		return ret;
624 
625 	if (status != CAN_ABORT_STATUS) {
626 		/*
627 		 * The scan abort will return 1 for success or
628 		 * 2 for "failure".  A failure condition can be
629 		 * due to simply not being in an active scan which
630 		 * can occur if we send the scan abort before the
631 		 * microcode has notified us that a scan is completed.
632 		 */
633 		IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
634 		ret = -ENOENT;
635 	}
636 
637 	return ret;
638 }
639 
iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm * mvm,struct iwl_scan_req_tx_cmd * tx_cmd,bool no_cck)640 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
641 				     struct iwl_scan_req_tx_cmd *tx_cmd,
642 				     bool no_cck)
643 {
644 	tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
645 					 TX_CMD_FLG_BT_DIS);
646 	tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
647 							   NL80211_BAND_2GHZ,
648 							   no_cck);
649 
650 	if (!iwl_mvm_has_new_station_api(mvm->fw)) {
651 		tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
652 		tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
653 
654 	/*
655 	 * Fw doesn't use this sta anymore, pending deprecation via HOST API
656 	 * change
657 	 */
658 	} else {
659 		tx_cmd[0].sta_id = 0xff;
660 		tx_cmd[1].sta_id = 0xff;
661 	}
662 
663 	tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
664 					 TX_CMD_FLG_BT_DIS);
665 
666 	tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
667 							   NL80211_BAND_5GHZ,
668 							   no_cck);
669 }
670 
671 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)672 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
673 			       struct ieee80211_channel **channels,
674 			       int n_channels, u32 ssid_bitmap,
675 			       struct iwl_scan_req_lmac *cmd)
676 {
677 	struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
678 	int i;
679 
680 	for (i = 0; i < n_channels; i++) {
681 		channel_cfg[i].channel_num =
682 			cpu_to_le16(channels[i]->hw_value);
683 		channel_cfg[i].iter_count = cpu_to_le16(1);
684 		channel_cfg[i].iter_interval = 0;
685 		channel_cfg[i].flags =
686 			cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
687 				    ssid_bitmap);
688 	}
689 }
690 
iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm * mvm,const u8 * ies,size_t len,u8 * const pos)691 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
692 					   size_t len, u8 *const pos)
693 {
694 	static const u8 before_ds_params[] = {
695 			WLAN_EID_SSID,
696 			WLAN_EID_SUPP_RATES,
697 			WLAN_EID_REQUEST,
698 			WLAN_EID_EXT_SUPP_RATES,
699 	};
700 	size_t offs;
701 	u8 *newpos = pos;
702 
703 	if (!iwl_mvm_rrm_scan_needed(mvm)) {
704 		memcpy(newpos, ies, len);
705 		return newpos + len;
706 	}
707 
708 	offs = ieee80211_ie_split(ies, len,
709 				  before_ds_params,
710 				  ARRAY_SIZE(before_ds_params),
711 				  0);
712 
713 	memcpy(newpos, ies, offs);
714 	newpos += offs;
715 
716 	/* Add a placeholder for DS Parameter Set element */
717 	*newpos++ = WLAN_EID_DS_PARAMS;
718 	*newpos++ = 1;
719 	*newpos++ = 0;
720 
721 	memcpy(newpos, ies + offs, len - offs);
722 	newpos += len - offs;
723 
724 	return newpos;
725 }
726 
727 #define WFA_TPC_IE_LEN	9
728 
iwl_mvm_add_tpc_report_ie(u8 * pos)729 static void iwl_mvm_add_tpc_report_ie(u8 *pos)
730 {
731 	pos[0] = WLAN_EID_VENDOR_SPECIFIC;
732 	pos[1] = WFA_TPC_IE_LEN - 2;
733 	pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
734 	pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
735 	pos[4] = WLAN_OUI_MICROSOFT & 0xff;
736 	pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
737 	pos[6] = 0;
738 	/* pos[7] - tx power will be inserted by the FW */
739 	pos[7] = 0;
740 	pos[8] = 0;
741 }
742 
743 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)744 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
745 			 struct ieee80211_scan_ies *ies,
746 			 struct iwl_mvm_scan_params *params)
747 {
748 	struct ieee80211_mgmt *frame = (void *)params->preq.buf;
749 	u8 *pos, *newpos;
750 	const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
751 		params->mac_addr : NULL;
752 
753 	/*
754 	 * Unfortunately, right now the offload scan doesn't support randomising
755 	 * within the firmware, so until the firmware API is ready we implement
756 	 * it in the driver. This means that the scan iterations won't really be
757 	 * random, only when it's restarted, but at least that helps a bit.
758 	 */
759 	if (mac_addr)
760 		get_random_mask_addr(frame->sa, mac_addr,
761 				     params->mac_addr_mask);
762 	else
763 		memcpy(frame->sa, vif->addr, ETH_ALEN);
764 
765 	frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
766 	eth_broadcast_addr(frame->da);
767 	ether_addr_copy(frame->bssid, params->bssid);
768 	frame->seq_ctrl = 0;
769 
770 	pos = frame->u.probe_req.variable;
771 	*pos++ = WLAN_EID_SSID;
772 	*pos++ = 0;
773 
774 	params->preq.mac_header.offset = 0;
775 	params->preq.mac_header.len = cpu_to_le16(24 + 2);
776 
777 	/* Insert ds parameter set element on 2.4 GHz band */
778 	newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
779 						 ies->ies[NL80211_BAND_2GHZ],
780 						 ies->len[NL80211_BAND_2GHZ],
781 						 pos);
782 	params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
783 	params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
784 	pos = newpos;
785 
786 	memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
787 	       ies->len[NL80211_BAND_5GHZ]);
788 	params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
789 	params->preq.band_data[1].len =
790 		cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
791 	pos += ies->len[NL80211_BAND_5GHZ];
792 
793 	memcpy(pos, ies->ies[NL80211_BAND_6GHZ],
794 	       ies->len[NL80211_BAND_6GHZ]);
795 	params->preq.band_data[2].offset = cpu_to_le16(pos - params->preq.buf);
796 	params->preq.band_data[2].len =
797 		cpu_to_le16(ies->len[NL80211_BAND_6GHZ]);
798 	pos += ies->len[NL80211_BAND_6GHZ];
799 	memcpy(pos, ies->common_ies, ies->common_ie_len);
800 	params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
801 
802 	if (iwl_mvm_rrm_scan_needed(mvm) &&
803 	    !fw_has_capa(&mvm->fw->ucode_capa,
804 			 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
805 		iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
806 		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
807 							   WFA_TPC_IE_LEN);
808 	} else {
809 		params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
810 	}
811 }
812 
iwl_mvm_scan_lmac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_lmac * cmd,struct iwl_mvm_scan_params * params)813 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
814 				    struct iwl_scan_req_lmac *cmd,
815 				    struct iwl_mvm_scan_params *params)
816 {
817 	cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
818 	cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
819 	cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
820 	cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
821 	cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
822 	cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
823 	cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
824 }
825 
iwl_mvm_scan_fits(struct iwl_mvm * mvm,int n_ssids,struct ieee80211_scan_ies * ies,int n_channels)826 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
827 				     struct ieee80211_scan_ies *ies,
828 				     int n_channels)
829 {
830 	return ((n_ssids <= PROBE_OPTION_MAX) &&
831 		(n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
832 		(ies->common_ie_len +
833 		 ies->len[NL80211_BAND_2GHZ] +
834 		 ies->len[NL80211_BAND_5GHZ] <=
835 		 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
836 }
837 
iwl_mvm_scan_use_ebs(struct iwl_mvm * mvm,struct ieee80211_vif * vif)838 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
839 					struct ieee80211_vif *vif)
840 {
841 	const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
842 	bool low_latency;
843 
844 	if (iwl_mvm_is_cdb_supported(mvm))
845 		low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ);
846 	else
847 		low_latency = iwl_mvm_low_latency(mvm);
848 
849 	/* We can only use EBS if:
850 	 *	1. the feature is supported;
851 	 *	2. the last EBS was successful;
852 	 *	3. if only single scan, the single scan EBS API is supported;
853 	 *	4. it's not a p2p find operation.
854 	 *	5. we are not in low latency mode,
855 	 *	   or if fragmented ebs is supported by the FW
856 	 */
857 	return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
858 		mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
859 		vif->type != NL80211_IFTYPE_P2P_DEVICE &&
860 		(!low_latency || iwl_mvm_is_frag_ebs_supported(mvm)));
861 }
862 
iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params * params)863 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
864 {
865 	return params->n_scan_plans == 1 &&
866 		params->scan_plans[0].iterations == 1;
867 }
868 
iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)869 static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)
870 {
871 	return (type == IWL_SCAN_TYPE_FRAGMENTED ||
872 		type == IWL_SCAN_TYPE_FAST_BALANCE);
873 }
874 
iwl_mvm_scan_lmac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)875 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
876 				   struct iwl_mvm_scan_params *params,
877 				   struct ieee80211_vif *vif)
878 {
879 	int flags = 0;
880 
881 	if (params->n_ssids == 0)
882 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
883 
884 	if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
885 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
886 
887 	if (iwl_mvm_is_scan_fragmented(params->type))
888 		flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
889 
890 	if (iwl_mvm_rrm_scan_needed(mvm) &&
891 	    fw_has_capa(&mvm->fw->ucode_capa,
892 			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
893 		flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
894 
895 	if (params->pass_all)
896 		flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
897 	else
898 		flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
899 
900 #ifdef CONFIG_IWLWIFI_DEBUGFS
901 	if (mvm->scan_iter_notif_enabled)
902 		flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
903 #endif
904 
905 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
906 		flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
907 
908 	if (iwl_mvm_is_regular_scan(params) &&
909 	    vif->type != NL80211_IFTYPE_P2P_DEVICE &&
910 	    !iwl_mvm_is_scan_fragmented(params->type))
911 		flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
912 
913 	return flags;
914 }
915 
916 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)917 iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req,
918 				  struct iwl_scan_probe_req *src_p_req)
919 {
920 	int i;
921 
922 	p_req->mac_header = src_p_req->mac_header;
923 	for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++)
924 		p_req->band_data[i] = src_p_req->band_data[i];
925 	p_req->common_data = src_p_req->common_data;
926 	memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf));
927 }
928 
iwl_mvm_scan_lmac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params)929 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
930 			     struct iwl_mvm_scan_params *params)
931 {
932 	struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
933 	struct iwl_scan_probe_req_v1 *preq =
934 		(void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
935 			 mvm->fw->ucode_capa.n_scan_channels);
936 	u32 ssid_bitmap = 0;
937 	int i;
938 	u8 band;
939 
940 	if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
941 		return -EINVAL;
942 
943 	iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
944 
945 	cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
946 	cmd->iter_num = cpu_to_le32(1);
947 	cmd->n_channels = (u8)params->n_channels;
948 
949 	cmd->delay = cpu_to_le32(params->delay);
950 
951 	cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
952 							      vif));
953 
954 	band = iwl_mvm_phy_band_from_nl80211(params->channels[0]->band);
955 	cmd->flags = cpu_to_le32(band);
956 	cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
957 					MAC_FILTER_IN_BEACON);
958 	iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
959 	iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
960 
961 	/* this API uses bits 1-20 instead of 0-19 */
962 	ssid_bitmap <<= 1;
963 
964 	for (i = 0; i < params->n_scan_plans; i++) {
965 		struct cfg80211_sched_scan_plan *scan_plan =
966 			&params->scan_plans[i];
967 
968 		cmd->schedule[i].delay =
969 			cpu_to_le16(scan_plan->interval);
970 		cmd->schedule[i].iterations = scan_plan->iterations;
971 		cmd->schedule[i].full_scan_mul = 1;
972 	}
973 
974 	/*
975 	 * If the number of iterations of the last scan plan is set to
976 	 * zero, it should run infinitely. However, this is not always the case.
977 	 * For example, when regular scan is requested the driver sets one scan
978 	 * plan with one iteration.
979 	 */
980 	if (!cmd->schedule[i - 1].iterations)
981 		cmd->schedule[i - 1].iterations = 0xff;
982 
983 	if (iwl_mvm_scan_use_ebs(mvm, vif)) {
984 		cmd->channel_opt[0].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[0].non_ebs_ratio =
989 			cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
990 		cmd->channel_opt[1].flags =
991 			cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
992 				    IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
993 				    IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
994 		cmd->channel_opt[1].non_ebs_ratio =
995 			cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
996 	}
997 
998 	iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
999 				       params->n_channels, ssid_bitmap, cmd);
1000 
1001 	iwl_mvm_scan_set_legacy_probe_req(preq, &params->preq);
1002 
1003 	return 0;
1004 }
1005 
rate_to_scan_rate_flag(unsigned int rate)1006 static int rate_to_scan_rate_flag(unsigned int rate)
1007 {
1008 	static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1009 		[IWL_RATE_1M_INDEX]	= SCAN_CONFIG_RATE_1M,
1010 		[IWL_RATE_2M_INDEX]	= SCAN_CONFIG_RATE_2M,
1011 		[IWL_RATE_5M_INDEX]	= SCAN_CONFIG_RATE_5M,
1012 		[IWL_RATE_11M_INDEX]	= SCAN_CONFIG_RATE_11M,
1013 		[IWL_RATE_6M_INDEX]	= SCAN_CONFIG_RATE_6M,
1014 		[IWL_RATE_9M_INDEX]	= SCAN_CONFIG_RATE_9M,
1015 		[IWL_RATE_12M_INDEX]	= SCAN_CONFIG_RATE_12M,
1016 		[IWL_RATE_18M_INDEX]	= SCAN_CONFIG_RATE_18M,
1017 		[IWL_RATE_24M_INDEX]	= SCAN_CONFIG_RATE_24M,
1018 		[IWL_RATE_36M_INDEX]	= SCAN_CONFIG_RATE_36M,
1019 		[IWL_RATE_48M_INDEX]	= SCAN_CONFIG_RATE_48M,
1020 		[IWL_RATE_54M_INDEX]	= SCAN_CONFIG_RATE_54M,
1021 	};
1022 
1023 	return rate_to_scan_rate[rate];
1024 }
1025 
iwl_mvm_scan_config_rates(struct iwl_mvm * mvm)1026 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1027 {
1028 	struct ieee80211_supported_band *band;
1029 	unsigned int rates = 0;
1030 	int i;
1031 
1032 	band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1033 	for (i = 0; i < band->n_bitrates; i++)
1034 		rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1035 	band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1036 	for (i = 0; i < band->n_bitrates; i++)
1037 		rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1038 
1039 	/* Set both basic rates and supported rates */
1040 	rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1041 
1042 	return cpu_to_le32(rates);
1043 }
1044 
iwl_mvm_fill_scan_dwell(struct iwl_mvm * mvm,struct iwl_scan_dwell * dwell)1045 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
1046 				    struct iwl_scan_dwell *dwell)
1047 {
1048 	dwell->active = IWL_SCAN_DWELL_ACTIVE;
1049 	dwell->passive = IWL_SCAN_DWELL_PASSIVE;
1050 	dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
1051 	dwell->extended = IWL_SCAN_DWELL_EXTENDED;
1052 }
1053 
iwl_mvm_fill_channels(struct iwl_mvm * mvm,u8 * channels,u32 max_channels)1054 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels,
1055 				  u32 max_channels)
1056 {
1057 	struct ieee80211_supported_band *band;
1058 	int i, j = 0;
1059 
1060 	band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1061 	for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1062 		channels[j] = band->channels[i].hw_value;
1063 	band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1064 	for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1065 		channels[j] = band->channels[i].hw_value;
1066 }
1067 
iwl_mvm_fill_scan_config_v1(struct iwl_mvm * mvm,void * config,u32 flags,u8 channel_flags,u32 max_channels)1068 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
1069 					u32 flags, u8 channel_flags,
1070 					u32 max_channels)
1071 {
1072 	enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL);
1073 	struct iwl_scan_config_v1 *cfg = config;
1074 
1075 	cfg->flags = cpu_to_le32(flags);
1076 	cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1077 	cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1078 	cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1079 	cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
1080 	cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
1081 
1082 	iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1083 
1084 	memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1085 
1086 	/* This function should not be called when using ADD_STA ver >=12 */
1087 	WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
1088 
1089 	cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1090 	cfg->channel_flags = channel_flags;
1091 
1092 	iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1093 }
1094 
iwl_mvm_fill_scan_config_v2(struct iwl_mvm * mvm,void * config,u32 flags,u8 channel_flags,u32 max_channels)1095 static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config,
1096 					u32 flags, u8 channel_flags,
1097 					u32 max_channels)
1098 {
1099 	struct iwl_scan_config_v2 *cfg = config;
1100 
1101 	cfg->flags = cpu_to_le32(flags);
1102 	cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1103 	cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1104 	cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1105 
1106 	if (iwl_mvm_is_cdb_supported(mvm)) {
1107 		enum iwl_mvm_scan_type lb_type, hb_type;
1108 
1109 		lb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1110 						     NL80211_BAND_2GHZ);
1111 		hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1112 						     NL80211_BAND_5GHZ);
1113 
1114 		cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1115 			cpu_to_le32(scan_timing[lb_type].max_out_time);
1116 		cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1117 			cpu_to_le32(scan_timing[lb_type].suspend_time);
1118 
1119 		cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] =
1120 			cpu_to_le32(scan_timing[hb_type].max_out_time);
1121 		cfg->suspend_time[SCAN_HB_LMAC_IDX] =
1122 			cpu_to_le32(scan_timing[hb_type].suspend_time);
1123 	} else {
1124 		enum iwl_mvm_scan_type type =
1125 			iwl_mvm_get_scan_type(mvm, NULL);
1126 
1127 		cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1128 			cpu_to_le32(scan_timing[type].max_out_time);
1129 		cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1130 			cpu_to_le32(scan_timing[type].suspend_time);
1131 	}
1132 
1133 	iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1134 
1135 	memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1136 
1137 	/* This function should not be called when using ADD_STA ver >=12 */
1138 	WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
1139 
1140 	cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1141 	cfg->channel_flags = channel_flags;
1142 
1143 	iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1144 }
1145 
iwl_mvm_legacy_config_scan(struct iwl_mvm * mvm)1146 static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
1147 {
1148 	void *cfg;
1149 	int ret, cmd_size;
1150 	struct iwl_host_cmd cmd = {
1151 		.id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1152 	};
1153 	enum iwl_mvm_scan_type type;
1154 	enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET;
1155 	int num_channels =
1156 		mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1157 		mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1158 	u32 flags;
1159 	u8 channel_flags;
1160 
1161 	if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1162 		num_channels = mvm->fw->ucode_capa.n_scan_channels;
1163 
1164 	if (iwl_mvm_is_cdb_supported(mvm)) {
1165 		type = iwl_mvm_get_scan_type_band(mvm, NULL,
1166 						  NL80211_BAND_2GHZ);
1167 		hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1168 						     NL80211_BAND_5GHZ);
1169 		if (type == mvm->scan_type && hb_type == mvm->hb_scan_type)
1170 			return 0;
1171 	} else {
1172 		type = iwl_mvm_get_scan_type(mvm, NULL);
1173 		if (type == mvm->scan_type)
1174 			return 0;
1175 	}
1176 
1177 	if (iwl_mvm_cdb_scan_api(mvm))
1178 		cmd_size = sizeof(struct iwl_scan_config_v2);
1179 	else
1180 		cmd_size = sizeof(struct iwl_scan_config_v1);
1181 	cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1182 
1183 	cfg = kzalloc(cmd_size, GFP_KERNEL);
1184 	if (!cfg)
1185 		return -ENOMEM;
1186 
1187 	flags = SCAN_CONFIG_FLAG_ACTIVATE |
1188 		 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1189 		 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1190 		 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1191 		 SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1192 		 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1193 		 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1194 		 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1195 		 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1196 		 SCAN_CONFIG_N_CHANNELS(num_channels) |
1197 		 (iwl_mvm_is_scan_fragmented(type) ?
1198 		  SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1199 		  SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1200 
1201 	channel_flags = IWL_CHANNEL_FLAG_EBS |
1202 			IWL_CHANNEL_FLAG_ACCURATE_EBS |
1203 			IWL_CHANNEL_FLAG_EBS_ADD |
1204 			IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1205 
1206 	/*
1207 	 * Check for fragmented scan on LMAC2 - high band.
1208 	 * LMAC1 - low band is checked above.
1209 	 */
1210 	if (iwl_mvm_cdb_scan_api(mvm)) {
1211 		if (iwl_mvm_is_cdb_supported(mvm))
1212 			flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ?
1213 				 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1214 				 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1215 		iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags,
1216 					    num_channels);
1217 	} else {
1218 		iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags,
1219 					    num_channels);
1220 	}
1221 
1222 	cmd.data[0] = cfg;
1223 	cmd.len[0] = cmd_size;
1224 	cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1225 
1226 	IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1227 
1228 	ret = iwl_mvm_send_cmd(mvm, &cmd);
1229 	if (!ret) {
1230 		mvm->scan_type = type;
1231 		mvm->hb_scan_type = hb_type;
1232 	}
1233 
1234 	kfree(cfg);
1235 	return ret;
1236 }
1237 
iwl_mvm_config_scan(struct iwl_mvm * mvm)1238 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1239 {
1240 	struct iwl_scan_config cfg;
1241 	struct iwl_host_cmd cmd = {
1242 		.id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1243 		.len[0] = sizeof(cfg),
1244 		.data[0] = &cfg,
1245 		.dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1246 	};
1247 
1248 	if (!iwl_mvm_is_reduced_config_scan_supported(mvm))
1249 		return iwl_mvm_legacy_config_scan(mvm);
1250 
1251 	memset(&cfg, 0, sizeof(cfg));
1252 
1253 	if (!iwl_mvm_has_new_station_api(mvm->fw)) {
1254 		cfg.bcast_sta_id = mvm->aux_sta.sta_id;
1255 	} else if (iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_CFG_CMD, 0) < 5) {
1256 		/*
1257 		 * Fw doesn't use this sta anymore. Deprecated on SCAN_CFG_CMD
1258 		 * version 5.
1259 		 */
1260 		cfg.bcast_sta_id = 0xff;
1261 	}
1262 
1263 	cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1264 	cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1265 
1266 	IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1267 
1268 	return iwl_mvm_send_cmd(mvm, &cmd);
1269 }
1270 
iwl_mvm_scan_uid_by_status(struct iwl_mvm * mvm,int status)1271 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1272 {
1273 	int i;
1274 
1275 	for (i = 0; i < mvm->max_scans; i++)
1276 		if (mvm->scan_uid_status[i] == status)
1277 			return i;
1278 
1279 	return -ENOENT;
1280 }
1281 
iwl_mvm_scan_umac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_umac * cmd,struct iwl_mvm_scan_params * params)1282 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1283 				    struct iwl_scan_req_umac *cmd,
1284 				    struct iwl_mvm_scan_params *params)
1285 {
1286 	struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1287 	u8 active_dwell, passive_dwell;
1288 
1289 	timing = &scan_timing[params->type];
1290 	active_dwell = IWL_SCAN_DWELL_ACTIVE;
1291 	passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1292 
1293 	if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1294 		cmd->v7.adwell_default_n_aps_social =
1295 			IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1296 		cmd->v7.adwell_default_n_aps =
1297 			IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1298 
1299 		if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm))
1300 			cmd->v9.adwell_default_hb_n_aps =
1301 				IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1302 
1303 		/* if custom max budget was configured with debugfs */
1304 		if (IWL_MVM_ADWELL_MAX_BUDGET)
1305 			cmd->v7.adwell_max_budget =
1306 				cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1307 		else if (params->ssids && params->ssids[0].ssid_len)
1308 			cmd->v7.adwell_max_budget =
1309 				cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1310 		else
1311 			cmd->v7.adwell_max_budget =
1312 				cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1313 
1314 		cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1315 		cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1316 			cpu_to_le32(timing->max_out_time);
1317 		cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1318 			cpu_to_le32(timing->suspend_time);
1319 
1320 		if (iwl_mvm_is_cdb_supported(mvm)) {
1321 			hb_timing = &scan_timing[params->hb_type];
1322 
1323 			cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1324 				cpu_to_le32(hb_timing->max_out_time);
1325 			cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1326 				cpu_to_le32(hb_timing->suspend_time);
1327 		}
1328 
1329 		if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1330 			cmd->v7.active_dwell = active_dwell;
1331 			cmd->v7.passive_dwell = passive_dwell;
1332 			cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1333 		} else {
1334 			cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1335 			cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1336 			if (iwl_mvm_is_cdb_supported(mvm)) {
1337 				cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
1338 					active_dwell;
1339 				cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
1340 					passive_dwell;
1341 			}
1342 		}
1343 	} else {
1344 		cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED;
1345 		cmd->v1.active_dwell = active_dwell;
1346 		cmd->v1.passive_dwell = passive_dwell;
1347 		cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1348 
1349 		if (iwl_mvm_is_cdb_supported(mvm)) {
1350 			hb_timing = &scan_timing[params->hb_type];
1351 
1352 			cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1353 					cpu_to_le32(hb_timing->max_out_time);
1354 			cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1355 					cpu_to_le32(hb_timing->suspend_time);
1356 		}
1357 
1358 		if (iwl_mvm_cdb_scan_api(mvm)) {
1359 			cmd->v6.scan_priority =
1360 				cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1361 			cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1362 				cpu_to_le32(timing->max_out_time);
1363 			cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1364 				cpu_to_le32(timing->suspend_time);
1365 		} else {
1366 			cmd->v1.scan_priority =
1367 				cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1368 			cmd->v1.max_out_time =
1369 				cpu_to_le32(timing->max_out_time);
1370 			cmd->v1.suspend_time =
1371 				cpu_to_le32(timing->suspend_time);
1372 		}
1373 	}
1374 
1375 	if (iwl_mvm_is_regular_scan(params))
1376 		cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1377 	else
1378 		cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1379 }
1380 
iwl_mvm_scan_umac_ooc_priority(struct iwl_mvm_scan_params * params)1381 static u32 iwl_mvm_scan_umac_ooc_priority(struct iwl_mvm_scan_params *params)
1382 {
1383 	return iwl_mvm_is_regular_scan(params) ?
1384 		IWL_SCAN_PRIORITY_EXT_6 :
1385 		IWL_SCAN_PRIORITY_EXT_2;
1386 }
1387 
1388 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)1389 iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm *mvm,
1390 			    struct iwl_scan_general_params_v11 *general_params,
1391 			    struct iwl_mvm_scan_params *params)
1392 {
1393 	struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1394 	u8 active_dwell, passive_dwell;
1395 
1396 	timing = &scan_timing[params->type];
1397 	active_dwell = IWL_SCAN_DWELL_ACTIVE;
1398 	passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1399 
1400 	general_params->adwell_default_social_chn =
1401 		IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1402 	general_params->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1403 	general_params->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1404 
1405 	/* if custom max budget was configured with debugfs */
1406 	if (IWL_MVM_ADWELL_MAX_BUDGET)
1407 		general_params->adwell_max_budget =
1408 			cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1409 	else if (params->ssids && params->ssids[0].ssid_len)
1410 		general_params->adwell_max_budget =
1411 			cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1412 	else
1413 		general_params->adwell_max_budget =
1414 			cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1415 
1416 	general_params->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1417 	general_params->max_out_of_time[SCAN_LB_LMAC_IDX] =
1418 		cpu_to_le32(timing->max_out_time);
1419 	general_params->suspend_time[SCAN_LB_LMAC_IDX] =
1420 		cpu_to_le32(timing->suspend_time);
1421 
1422 	hb_timing = &scan_timing[params->hb_type];
1423 
1424 	general_params->max_out_of_time[SCAN_HB_LMAC_IDX] =
1425 		cpu_to_le32(hb_timing->max_out_time);
1426 	general_params->suspend_time[SCAN_HB_LMAC_IDX] =
1427 		cpu_to_le32(hb_timing->suspend_time);
1428 
1429 	general_params->active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1430 	general_params->passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1431 	general_params->active_dwell[SCAN_HB_LMAC_IDX] = active_dwell;
1432 	general_params->passive_dwell[SCAN_HB_LMAC_IDX] = passive_dwell;
1433 }
1434 
1435 struct iwl_mvm_scan_channel_segment {
1436 	u8 start_idx;
1437 	u8 end_idx;
1438 	u8 first_channel_id;
1439 	u8 last_channel_id;
1440 	u8 channel_spacing_shift;
1441 	u8 band;
1442 };
1443 
1444 static const struct iwl_mvm_scan_channel_segment scan_channel_segments[] = {
1445 	{
1446 		.start_idx = 0,
1447 		.end_idx = 13,
1448 		.first_channel_id = 1,
1449 		.last_channel_id = 14,
1450 		.channel_spacing_shift = 0,
1451 		.band = PHY_BAND_24
1452 	},
1453 	{
1454 		.start_idx = 14,
1455 		.end_idx = 41,
1456 		.first_channel_id = 36,
1457 		.last_channel_id = 144,
1458 		.channel_spacing_shift = 2,
1459 		.band = PHY_BAND_5
1460 	},
1461 	{
1462 		.start_idx = 42,
1463 		.end_idx = 50,
1464 		.first_channel_id = 149,
1465 		.last_channel_id = 181,
1466 		.channel_spacing_shift = 2,
1467 		.band = PHY_BAND_5
1468 	},
1469 	{
1470 		.start_idx = 51,
1471 		.end_idx = 111,
1472 		.first_channel_id = 1,
1473 		.last_channel_id = 241,
1474 		.channel_spacing_shift = 2,
1475 		.band = PHY_BAND_6
1476 	},
1477 };
1478 
iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id,u8 band)1479 static int iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id, u8 band)
1480 {
1481 	int i, index;
1482 
1483 	if (!channel_id)
1484 		return -EINVAL;
1485 
1486 	for (i = 0; i < ARRAY_SIZE(scan_channel_segments); i++) {
1487 		const struct iwl_mvm_scan_channel_segment *ch_segment =
1488 			&scan_channel_segments[i];
1489 		u32 ch_offset;
1490 
1491 		if (ch_segment->band != band ||
1492 		    ch_segment->first_channel_id > channel_id ||
1493 		    ch_segment->last_channel_id < channel_id)
1494 			continue;
1495 
1496 		ch_offset = (channel_id - ch_segment->first_channel_id) >>
1497 			ch_segment->channel_spacing_shift;
1498 
1499 		index = scan_channel_segments[i].start_idx + ch_offset;
1500 		if (index < IWL_SCAN_NUM_CHANNELS)
1501 			return index;
1502 
1503 		break;
1504 	}
1505 
1506 	return -EINVAL;
1507 }
1508 
1509 static const u8 p2p_go_friendly_chs[] = {
1510 	36, 40, 44, 48, 149, 153, 157, 161, 165,
1511 };
1512 
1513 static const u8 social_chs[] = {
1514 	1, 6, 11
1515 };
1516 
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)1517 static void iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type,
1518 					       u8 ch_id, u8 band, u8 *ch_bitmap,
1519 					       size_t bitmap_n_entries)
1520 {
1521 	int i;
1522 
1523 	if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1524 		return;
1525 
1526 	for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1527 		if (p2p_go_friendly_chs[i] == ch_id) {
1528 			int ch_idx, bitmap_idx;
1529 
1530 			ch_idx = iwl_mvm_scan_ch_and_band_to_idx(ch_id, band);
1531 			if (ch_idx < 0)
1532 				return;
1533 
1534 			bitmap_idx = ch_idx / 8;
1535 			if (bitmap_idx >= bitmap_n_entries)
1536 				return;
1537 
1538 			ch_idx = ch_idx % 8;
1539 			ch_bitmap[bitmap_idx] |= BIT(ch_idx);
1540 
1541 			return;
1542 		}
1543 	}
1544 }
1545 
iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type,u8 ch_id)1546 static u32 iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id)
1547 {
1548 	int i;
1549 	u32 flags = 0;
1550 
1551 	if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1552 		goto out;
1553 
1554 	for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1555 		if (p2p_go_friendly_chs[i] == ch_id) {
1556 			flags |= IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
1557 			break;
1558 		}
1559 	}
1560 
1561 	if (flags)
1562 		goto out;
1563 
1564 	for (i = 0; i < ARRAY_SIZE(social_chs); i++) {
1565 		if (social_chs[i] == ch_id) {
1566 			flags |= IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT;
1567 			break;
1568 		}
1569 	}
1570 
1571 out:
1572 	return flags;
1573 }
1574 
1575 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)1576 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1577 			       struct ieee80211_channel **channels,
1578 			       int n_channels, u32 flags,
1579 			       struct iwl_scan_channel_cfg_umac *channel_cfg)
1580 {
1581 	int i;
1582 
1583 	for (i = 0; i < n_channels; i++) {
1584 		channel_cfg[i].flags = cpu_to_le32(flags);
1585 		channel_cfg[i].v1.channel_num = channels[i]->hw_value;
1586 		if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
1587 			enum nl80211_band band = channels[i]->band;
1588 
1589 			channel_cfg[i].v2.band =
1590 				iwl_mvm_phy_band_from_nl80211(band);
1591 			channel_cfg[i].v2.iter_count = 1;
1592 			channel_cfg[i].v2.iter_interval = 0;
1593 		} else {
1594 			channel_cfg[i].v1.iter_count = 1;
1595 			channel_cfg[i].v1.iter_interval = 0;
1596 		}
1597 	}
1598 }
1599 
1600 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)1601 iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm *mvm,
1602 				  struct ieee80211_channel **channels,
1603 				  struct iwl_scan_channel_params_v4 *cp,
1604 				  int n_channels, u32 flags,
1605 				  enum nl80211_iftype vif_type)
1606 {
1607 	u8 *bitmap = cp->adwell_ch_override_bitmap;
1608 	size_t bitmap_n_entries = ARRAY_SIZE(cp->adwell_ch_override_bitmap);
1609 	int i;
1610 
1611 	for (i = 0; i < n_channels; i++) {
1612 		enum nl80211_band band = channels[i]->band;
1613 		struct iwl_scan_channel_cfg_umac *cfg =
1614 			&cp->channel_config[i];
1615 
1616 		cfg->flags = cpu_to_le32(flags);
1617 		cfg->v2.channel_num = channels[i]->hw_value;
1618 		cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
1619 		cfg->v2.iter_count = 1;
1620 		cfg->v2.iter_interval = 0;
1621 
1622 		iwl_mvm_scan_ch_add_n_aps_override(vif_type,
1623 						   cfg->v2.channel_num,
1624 						   cfg->v2.band, bitmap,
1625 						   bitmap_n_entries);
1626 	}
1627 }
1628 
1629 static void
iwl_mvm_umac_scan_cfg_channels_v7(struct iwl_mvm * mvm,struct ieee80211_channel ** channels,struct iwl_scan_channel_params_v7 * cp,int n_channels,u32 flags,enum nl80211_iftype vif_type,u32 version)1630 iwl_mvm_umac_scan_cfg_channels_v7(struct iwl_mvm *mvm,
1631 				  struct ieee80211_channel **channels,
1632 				  struct iwl_scan_channel_params_v7 *cp,
1633 				  int n_channels, u32 flags,
1634 				  enum nl80211_iftype vif_type, u32 version)
1635 {
1636 	int i;
1637 
1638 	for (i = 0; i < n_channels; i++) {
1639 		enum nl80211_band band = channels[i]->band;
1640 		struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i];
1641 		u32 n_aps_flag =
1642 			iwl_mvm_scan_ch_n_aps_flag(vif_type,
1643 						   channels[i]->hw_value);
1644 		u8 iwl_band = iwl_mvm_phy_band_from_nl80211(band);
1645 
1646 		cfg->flags = cpu_to_le32(flags | n_aps_flag);
1647 		cfg->v2.channel_num = channels[i]->hw_value;
1648 		if (cfg80211_channel_is_psc(channels[i]))
1649 			cfg->flags = 0;
1650 		cfg->v2.iter_count = 1;
1651 		cfg->v2.iter_interval = 0;
1652 		if (version < 17)
1653 			cfg->v2.band = iwl_band;
1654 		else
1655 			cfg->flags |= cpu_to_le32((iwl_band <<
1656 						   IWL_CHAN_CFG_FLAGS_BAND_POS));
1657 	}
1658 }
1659 
1660 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)1661 iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm *mvm,
1662 				    struct iwl_mvm_scan_params *params,
1663 				     struct iwl_scan_probe_params_v4 *pp)
1664 {
1665 	int j, idex_s = 0, idex_b = 0;
1666 	struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1667 		params->scan_6ghz_params;
1668 	bool hidden_supported = fw_has_capa(&mvm->fw->ucode_capa,
1669 					    IWL_UCODE_TLV_CAPA_HIDDEN_6GHZ_SCAN);
1670 
1671 	for (j = 0; j < params->n_ssids && idex_s < SCAN_SHORT_SSID_MAX_SIZE;
1672 	     j++) {
1673 		if (!params->ssids[j].ssid_len)
1674 			continue;
1675 
1676 		pp->short_ssid[idex_s] =
1677 			cpu_to_le32(~crc32_le(~0, params->ssids[j].ssid,
1678 					      params->ssids[j].ssid_len));
1679 
1680 		if (hidden_supported) {
1681 			pp->direct_scan[idex_s].id = WLAN_EID_SSID;
1682 			pp->direct_scan[idex_s].len = params->ssids[j].ssid_len;
1683 			memcpy(pp->direct_scan[idex_s].ssid, params->ssids[j].ssid,
1684 			       params->ssids[j].ssid_len);
1685 		}
1686 		idex_s++;
1687 	}
1688 
1689 	/*
1690 	 * Populate the arrays of the short SSIDs and the BSSIDs using the 6GHz
1691 	 * collocated parameters. This might not be optimal, as this processing
1692 	 * does not (yet) correspond to the actual channels, so it is possible
1693 	 * that some entries would be left out.
1694 	 *
1695 	 * TODO: improve this logic.
1696 	 */
1697 	for (j = 0; j < params->n_6ghz_params; j++) {
1698 		int k;
1699 
1700 		/* First, try to place the short SSID */
1701 		if (scan_6ghz_params[j].short_ssid_valid) {
1702 			for (k = 0; k < idex_s; k++) {
1703 				if (pp->short_ssid[k] ==
1704 				    cpu_to_le32(scan_6ghz_params[j].short_ssid))
1705 					break;
1706 			}
1707 
1708 			if (k == idex_s && idex_s < SCAN_SHORT_SSID_MAX_SIZE) {
1709 				pp->short_ssid[idex_s++] =
1710 					cpu_to_le32(scan_6ghz_params[j].short_ssid);
1711 			}
1712 		}
1713 
1714 		/* try to place BSSID for the same entry */
1715 		for (k = 0; k < idex_b; k++) {
1716 			if (!memcmp(&pp->bssid_array[k],
1717 				    scan_6ghz_params[j].bssid, ETH_ALEN))
1718 				break;
1719 		}
1720 
1721 		if (k == idex_b && idex_b < SCAN_BSSID_MAX_SIZE) {
1722 			memcpy(&pp->bssid_array[idex_b++],
1723 			       scan_6ghz_params[j].bssid, ETH_ALEN);
1724 		}
1725 	}
1726 
1727 	pp->short_ssid_num = idex_s;
1728 	pp->bssid_num = idex_b;
1729 }
1730 
1731 /* TODO: this function can be merged with iwl_mvm_scan_umac_fill_ch_p_v7 */
1732 static u32
iwl_mvm_umac_scan_cfg_channels_v7_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_v7 * cp,enum nl80211_iftype vif_type,u32 version)1733 iwl_mvm_umac_scan_cfg_channels_v7_6g(struct iwl_mvm *mvm,
1734 				     struct iwl_mvm_scan_params *params,
1735 				     u32 n_channels,
1736 				     struct iwl_scan_probe_params_v4 *pp,
1737 				     struct iwl_scan_channel_params_v7 *cp,
1738 				     enum nl80211_iftype vif_type,
1739 				     u32 version)
1740 {
1741 	int i;
1742 	struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1743 		params->scan_6ghz_params;
1744 	u32 ch_cnt;
1745 
1746 	for (i = 0, ch_cnt = 0; i < params->n_channels; i++) {
1747 		struct iwl_scan_channel_cfg_umac *cfg =
1748 			&cp->channel_config[ch_cnt];
1749 
1750 		u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0;
1751 		u8 j, k, s_max = 0, b_max = 0, n_used_bssid_entries;
1752 		bool force_passive, found = false, allow_passive = true,
1753 		     unsolicited_probe_on_chan = false, psc_no_listen = false;
1754 		s8 psd_20 = IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
1755 
1756 		/*
1757 		 * Avoid performing passive scan on non PSC channels unless the
1758 		 * scan is specifically a passive scan, i.e., no SSIDs
1759 		 * configured in the scan command.
1760 		 */
1761 		if (!cfg80211_channel_is_psc(params->channels[i]) &&
1762 		    !params->n_6ghz_params && params->n_ssids)
1763 			continue;
1764 
1765 		cfg->v1.channel_num = params->channels[i]->hw_value;
1766 		if (version < 17)
1767 			cfg->v2.band = PHY_BAND_6;
1768 		else
1769 			cfg->flags |= cpu_to_le32(PHY_BAND_6 <<
1770 						  IWL_CHAN_CFG_FLAGS_BAND_POS);
1771 
1772 		cfg->v5.iter_count = 1;
1773 		cfg->v5.iter_interval = 0;
1774 
1775 		/*
1776 		 * The optimize the scan time, i.e., reduce the scan dwell time
1777 		 * on each channel, the below logic tries to set 3 direct BSSID
1778 		 * probe requests for each broadcast probe request with a short
1779 		 * SSID.
1780 		 * TODO: improve this logic
1781 		 */
1782 		n_used_bssid_entries = 3;
1783 		for (j = 0; j < params->n_6ghz_params; j++) {
1784 			s8 tmp_psd_20;
1785 
1786 			if (!(scan_6ghz_params[j].channel_idx == i))
1787 				continue;
1788 
1789 			/* Use the highest PSD value allowed as advertised by
1790 			 * APs for this channel
1791 			 */
1792 			tmp_psd_20 = scan_6ghz_params[j].psd_20;
1793 			if (tmp_psd_20 !=
1794 			    IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED &&
1795 			    (psd_20 ==
1796 			     IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED ||
1797 			     psd_20 < tmp_psd_20))
1798 				psd_20 = tmp_psd_20;
1799 
1800 			found = false;
1801 			unsolicited_probe_on_chan |=
1802 				scan_6ghz_params[j].unsolicited_probe;
1803 			psc_no_listen |= scan_6ghz_params[j].psc_no_listen;
1804 
1805 			for (k = 0; k < pp->short_ssid_num; k++) {
1806 				if (!scan_6ghz_params[j].unsolicited_probe &&
1807 				    le32_to_cpu(pp->short_ssid[k]) ==
1808 				    scan_6ghz_params[j].short_ssid) {
1809 					/* Relevant short SSID bit set */
1810 					if (s_ssid_bitmap & BIT(k)) {
1811 						found = true;
1812 						break;
1813 					}
1814 
1815 					/*
1816 					 * Use short SSID only to create a new
1817 					 * iteration during channel dwell or in
1818 					 * case that the short SSID has a
1819 					 * matching SSID, i.e., scan for hidden
1820 					 * APs.
1821 					 */
1822 					if (n_used_bssid_entries >= 3) {
1823 						s_ssid_bitmap |= BIT(k);
1824 						s_max++;
1825 						n_used_bssid_entries -= 3;
1826 						found = true;
1827 						break;
1828 					} else if (pp->direct_scan[k].len) {
1829 						s_ssid_bitmap |= BIT(k);
1830 						s_max++;
1831 						found = true;
1832 						allow_passive = false;
1833 						break;
1834 					}
1835 				}
1836 			}
1837 
1838 			if (found)
1839 				continue;
1840 
1841 			for (k = 0; k < pp->bssid_num; k++) {
1842 				if (!memcmp(&pp->bssid_array[k],
1843 					    scan_6ghz_params[j].bssid,
1844 					    ETH_ALEN)) {
1845 					if (!(bssid_bitmap & BIT(k))) {
1846 						bssid_bitmap |= BIT(k);
1847 						b_max++;
1848 						n_used_bssid_entries++;
1849 					}
1850 					break;
1851 				}
1852 			}
1853 		}
1854 
1855 		if (cfg80211_channel_is_psc(params->channels[i]) &&
1856 		    psc_no_listen)
1857 			flags |= IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN;
1858 
1859 		if (unsolicited_probe_on_chan)
1860 			flags |= IWL_UHB_CHAN_CFG_FLAG_UNSOLICITED_PROBE_RES;
1861 
1862 		/*
1863 		 * In the following cases apply passive scan:
1864 		 * 1. Non fragmented scan:
1865 		 *	- PSC channel with NO_LISTEN_FLAG on should be treated
1866 		 *	  like non PSC channel
1867 		 *	- Non PSC channel with more than 3 short SSIDs or more
1868 		 *	  than 9 BSSIDs.
1869 		 *	- Non PSC Channel with unsolicited probe response and
1870 		 *	  more than 2 short SSIDs or more than 6 BSSIDs.
1871 		 *	- PSC channel with more than 2 short SSIDs or more than
1872 		 *	  6 BSSIDs.
1873 		 * 3. Fragmented scan:
1874 		 *	- PSC channel with more than 1 SSID or 3 BSSIDs.
1875 		 *	- Non PSC channel with more than 2 SSIDs or 6 BSSIDs.
1876 		 *	- Non PSC channel with unsolicited probe response and
1877 		 *	  more than 1 SSID or more than 3 BSSIDs.
1878 		 */
1879 		if (!iwl_mvm_is_scan_fragmented(params->type)) {
1880 			if (!cfg80211_channel_is_psc(params->channels[i]) ||
1881 			    flags & IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN) {
1882 				force_passive = (s_max > 3 || b_max > 9);
1883 				force_passive |= (unsolicited_probe_on_chan &&
1884 						  (s_max > 2 || b_max > 6));
1885 			} else {
1886 				force_passive = (s_max > 2 || b_max > 6);
1887 			}
1888 		} else if (cfg80211_channel_is_psc(params->channels[i])) {
1889 			force_passive = (s_max > 1 || b_max > 3);
1890 		} else {
1891 			force_passive = (s_max > 2 || b_max > 6);
1892 			force_passive |= (unsolicited_probe_on_chan &&
1893 					  (s_max > 1 || b_max > 3));
1894 		}
1895 		if ((allow_passive && force_passive) ||
1896 		    (!(bssid_bitmap | s_ssid_bitmap) &&
1897 		     !cfg80211_channel_is_psc(params->channels[i])))
1898 			flags |= IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE;
1899 		else
1900 			flags |= bssid_bitmap | (s_ssid_bitmap << 16);
1901 
1902 		cfg->flags |= cpu_to_le32(flags);
1903 		if (version >= 17)
1904 			cfg->v5.psd_20 = psd_20;
1905 
1906 		ch_cnt++;
1907 	}
1908 
1909 	if (params->n_channels > ch_cnt)
1910 		IWL_DEBUG_SCAN(mvm,
1911 			       "6GHz: reducing number channels: (%u->%u)\n",
1912 			       params->n_channels, ch_cnt);
1913 
1914 	return ch_cnt;
1915 }
1916 
iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)1917 static u8 iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm *mvm,
1918 					  struct iwl_mvm_scan_params *params,
1919 					  struct ieee80211_vif *vif)
1920 {
1921 	u8 flags = 0;
1922 
1923 	flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER;
1924 
1925 	if (iwl_mvm_scan_use_ebs(mvm, vif))
1926 		flags |= IWL_SCAN_CHANNEL_FLAG_EBS |
1927 			IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1928 			IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1929 
1930 	/* set fragmented ebs for fragmented scan on HB channels */
1931 	if ((!iwl_mvm_is_cdb_supported(mvm) &&
1932 	     iwl_mvm_is_scan_fragmented(params->type)) ||
1933 	    (iwl_mvm_is_cdb_supported(mvm) &&
1934 	     iwl_mvm_is_scan_fragmented(params->hb_type)))
1935 		flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
1936 
1937 	/*
1938 	 * force EBS in case the scan is a fragmented and there is a need to take P2P
1939 	 * GO operation into consideration during scan operation.
1940 	 */
1941 	if ((!iwl_mvm_is_cdb_supported(mvm) &&
1942 	     iwl_mvm_is_scan_fragmented(params->type) && params->respect_p2p_go) ||
1943 	    (iwl_mvm_is_cdb_supported(mvm) &&
1944 	     iwl_mvm_is_scan_fragmented(params->hb_type) &&
1945 	     params->respect_p2p_go_hb)) {
1946 		IWL_DEBUG_SCAN(mvm, "Respect P2P GO. Force EBS\n");
1947 		flags |= IWL_SCAN_CHANNEL_FLAG_FORCE_EBS;
1948 	}
1949 
1950 	return flags;
1951 }
1952 
iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)1953 static void iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm *mvm,
1954 					   struct iwl_mvm_scan_params *params,
1955 					   struct ieee80211_vif *vif)
1956 {
1957 	struct ieee80211_supported_band *sband =
1958 		&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
1959 	u32 n_disabled, i;
1960 
1961 	params->enable_6ghz_passive = false;
1962 
1963 	if (params->scan_6ghz)
1964 		return;
1965 
1966 	if (!fw_has_capa(&mvm->fw->ucode_capa,
1967 			 IWL_UCODE_TLV_CAPA_PASSIVE_6GHZ_SCAN)) {
1968 		IWL_DEBUG_SCAN(mvm,
1969 			       "6GHz passive scan: Not supported by FW\n");
1970 		return;
1971 	}
1972 
1973 	/* 6GHz passive scan allowed only on station interface  */
1974 	if (vif->type != NL80211_IFTYPE_STATION) {
1975 		IWL_DEBUG_SCAN(mvm,
1976 			       "6GHz passive scan: not station interface\n");
1977 		return;
1978 	}
1979 
1980 	/*
1981 	 * 6GHz passive scan is allowed in a defined time interval following HW
1982 	 * reset or resume flow, or while not associated and a large interval
1983 	 * has passed since the last 6GHz passive scan.
1984 	 */
1985 	if ((vif->cfg.assoc ||
1986 	     time_after(mvm->last_6ghz_passive_scan_jiffies +
1987 			(IWL_MVM_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) &&
1988 	    (time_before(mvm->last_reset_or_resume_time_jiffies +
1989 			 (IWL_MVM_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ),
1990 			 jiffies))) {
1991 		IWL_DEBUG_SCAN(mvm, "6GHz passive scan: %s\n",
1992 			       vif->cfg.assoc ? "associated" :
1993 			       "timeout did not expire");
1994 		return;
1995 	}
1996 
1997 	/* not enough channels in the regular scan request */
1998 	if (params->n_channels < IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS) {
1999 		IWL_DEBUG_SCAN(mvm,
2000 			       "6GHz passive scan: not enough channels\n");
2001 		return;
2002 	}
2003 
2004 	for (i = 0; i < params->n_ssids; i++) {
2005 		if (!params->ssids[i].ssid_len)
2006 			break;
2007 	}
2008 
2009 	/* not a wildcard scan, so cannot enable passive 6GHz scan */
2010 	if (i == params->n_ssids) {
2011 		IWL_DEBUG_SCAN(mvm,
2012 			       "6GHz passive scan: no wildcard SSID\n");
2013 		return;
2014 	}
2015 
2016 	if (!sband || !sband->n_channels) {
2017 		IWL_DEBUG_SCAN(mvm,
2018 			       "6GHz passive scan: no 6GHz channels\n");
2019 		return;
2020 	}
2021 
2022 	for (i = 0, n_disabled = 0; i < sband->n_channels; i++) {
2023 		if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED))
2024 			n_disabled++;
2025 	}
2026 
2027 	/*
2028 	 * Not all the 6GHz channels are disabled, so no need for 6GHz passive
2029 	 * scan
2030 	 */
2031 	if (n_disabled != sband->n_channels) {
2032 		IWL_DEBUG_SCAN(mvm,
2033 			       "6GHz passive scan: 6GHz channels enabled\n");
2034 		return;
2035 	}
2036 
2037 	/* all conditions to enable 6ghz passive scan are satisfied */
2038 	IWL_DEBUG_SCAN(mvm, "6GHz passive scan: can be enabled\n");
2039 	params->enable_6ghz_passive = true;
2040 }
2041 
iwl_mvm_scan_umac_flags_v2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,int type)2042 static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm,
2043 				      struct iwl_mvm_scan_params *params,
2044 				      struct ieee80211_vif *vif,
2045 				      int type)
2046 {
2047 	u16 flags = 0;
2048 
2049 	/*
2050 	 * If no direct SSIDs are provided perform a passive scan. Otherwise,
2051 	 * if there is a single SSID which is not the broadcast SSID, assume
2052 	 * that the scan is intended for roaming purposes and thus enable Rx on
2053 	 * all chains to improve chances of hearing the beacons/probe responses.
2054 	 */
2055 	if (params->n_ssids == 0)
2056 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE;
2057 	else if (params->n_ssids == 1 && params->ssids[0].ssid_len)
2058 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_USE_ALL_RX_CHAINS;
2059 
2060 	if (iwl_mvm_is_scan_fragmented(params->type))
2061 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
2062 
2063 	if (iwl_mvm_is_scan_fragmented(params->hb_type))
2064 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2;
2065 
2066 	if (params->pass_all)
2067 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL;
2068 	else
2069 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH;
2070 
2071 	if (!iwl_mvm_is_regular_scan(params))
2072 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC;
2073 
2074 	if (params->iter_notif ||
2075 	    mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2076 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE;
2077 
2078 	if (IWL_MVM_ADWELL_ENABLE)
2079 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL;
2080 
2081 	if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2082 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE;
2083 
2084 	if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2085 	    params->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ)
2086 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_TRIGGER_UHB_SCAN;
2087 
2088 	if (params->enable_6ghz_passive)
2089 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_6GHZ_PASSIVE_SCAN;
2090 
2091 	if (iwl_mvm_is_oce_supported(mvm) &&
2092 	    (params->flags & (NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP |
2093 			      NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE |
2094 			      NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)))
2095 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_OCE;
2096 
2097 	return flags;
2098 }
2099 
iwl_mvm_scan_umac_flags2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,int type)2100 static u8 iwl_mvm_scan_umac_flags2(struct iwl_mvm *mvm,
2101 				   struct iwl_mvm_scan_params *params,
2102 				   struct ieee80211_vif *vif, int type)
2103 {
2104 	u8 flags = 0;
2105 
2106 	if (iwl_mvm_is_cdb_supported(mvm)) {
2107 		if (params->respect_p2p_go)
2108 			flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB;
2109 		if (params->respect_p2p_go_hb)
2110 			flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2111 	} else {
2112 		if (params->respect_p2p_go)
2113 			flags = IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB |
2114 				IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2115 	}
2116 
2117 	if (params->scan_6ghz &&
2118 	    fw_has_capa(&mvm->fw->ucode_capa,
2119 			IWL_UCODE_TLV_CAPA_SCAN_DONT_TOGGLE_ANT))
2120 		flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_DONT_TOGGLE_ANT;
2121 
2122 	return flags;
2123 }
2124 
iwl_mvm_scan_umac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2125 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
2126 				   struct iwl_mvm_scan_params *params,
2127 				   struct ieee80211_vif *vif)
2128 {
2129 	u16 flags = 0;
2130 
2131 	if (params->n_ssids == 0)
2132 		flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
2133 
2134 	if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
2135 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
2136 
2137 	if (iwl_mvm_is_scan_fragmented(params->type))
2138 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
2139 
2140 	if (iwl_mvm_is_cdb_supported(mvm) &&
2141 	    iwl_mvm_is_scan_fragmented(params->hb_type))
2142 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
2143 
2144 	if (iwl_mvm_rrm_scan_needed(mvm) &&
2145 	    fw_has_capa(&mvm->fw->ucode_capa,
2146 			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
2147 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
2148 
2149 	if (params->pass_all)
2150 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
2151 	else
2152 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
2153 
2154 	if (!iwl_mvm_is_regular_scan(params))
2155 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
2156 
2157 	if (params->iter_notif)
2158 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2159 
2160 #ifdef CONFIG_IWLWIFI_DEBUGFS
2161 	if (mvm->scan_iter_notif_enabled)
2162 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2163 #endif
2164 
2165 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2166 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2167 
2168 	if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE)
2169 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
2170 
2171 	/*
2172 	 * Extended dwell is relevant only for low band to start with, as it is
2173 	 * being used for social channles only (1, 6, 11), so we can check
2174 	 * only scan type on low band also for CDB.
2175 	 */
2176 	if (iwl_mvm_is_regular_scan(params) &&
2177 	    vif->type != NL80211_IFTYPE_P2P_DEVICE &&
2178 	    !iwl_mvm_is_scan_fragmented(params->type) &&
2179 	    !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
2180 	    !iwl_mvm_is_oce_supported(mvm))
2181 		flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
2182 
2183 	if (iwl_mvm_is_oce_supported(mvm)) {
2184 		if ((params->flags &
2185 		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
2186 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
2187 		/* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
2188 		 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
2189 		 * the same bit, we need to make sure that we use this bit here
2190 		 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
2191 		 * used. */
2192 		if ((params->flags &
2193 		     NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
2194 		     !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
2195 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
2196 		if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
2197 			flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
2198 	}
2199 
2200 	return flags;
2201 }
2202 
2203 static int
iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params * params,struct iwl_scan_umac_schedule * schedule,__le16 * delay)2204 iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params *params,
2205 			       struct iwl_scan_umac_schedule *schedule,
2206 			       __le16 *delay)
2207 {
2208 	int i;
2209 	if (WARN_ON(!params->n_scan_plans ||
2210 		    params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
2211 		return -EINVAL;
2212 
2213 	for (i = 0; i < params->n_scan_plans; i++) {
2214 		struct cfg80211_sched_scan_plan *scan_plan =
2215 			&params->scan_plans[i];
2216 
2217 		schedule[i].iter_count = scan_plan->iterations;
2218 		schedule[i].interval =
2219 			cpu_to_le16(scan_plan->interval);
2220 	}
2221 
2222 	/*
2223 	 * If the number of iterations of the last scan plan is set to
2224 	 * zero, it should run infinitely. However, this is not always the case.
2225 	 * For example, when regular scan is requested the driver sets one scan
2226 	 * plan with one iteration.
2227 	 */
2228 	if (!schedule[params->n_scan_plans - 1].iter_count)
2229 		schedule[params->n_scan_plans - 1].iter_count = 0xff;
2230 
2231 	*delay = cpu_to_le16(params->delay);
2232 
2233 	return 0;
2234 }
2235 
iwl_mvm_scan_umac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2236 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2237 			     struct iwl_mvm_scan_params *params,
2238 			     int type, int uid)
2239 {
2240 	struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
2241 	struct iwl_scan_umac_chan_param *chan_param;
2242 	void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
2243 	void *sec_part = (u8 *)cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) *
2244 		mvm->fw->ucode_capa.n_scan_channels;
2245 	struct iwl_scan_req_umac_tail_v2 *tail_v2 =
2246 		(struct iwl_scan_req_umac_tail_v2 *)sec_part;
2247 	struct iwl_scan_req_umac_tail_v1 *tail_v1;
2248 	struct iwl_ssid_ie *direct_scan;
2249 	int ret = 0;
2250 	u32 ssid_bitmap = 0;
2251 	u8 channel_flags = 0;
2252 	u16 gen_flags;
2253 	struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2254 
2255 	chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
2256 
2257 	iwl_mvm_scan_umac_dwell(mvm, cmd, params);
2258 
2259 	mvm->scan_uid_status[uid] = type;
2260 
2261 	cmd->uid = cpu_to_le32(uid);
2262 	gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
2263 	cmd->general_flags = cpu_to_le16(gen_flags);
2264 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
2265 		if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
2266 			cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
2267 							IWL_SCAN_NUM_OF_FRAGS;
2268 		if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
2269 			cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
2270 							IWL_SCAN_NUM_OF_FRAGS;
2271 
2272 		cmd->v8.general_flags2 =
2273 			IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER;
2274 	}
2275 
2276 	cmd->scan_start_mac_id = scan_vif->id;
2277 
2278 	if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2279 		cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
2280 
2281 	if (iwl_mvm_scan_use_ebs(mvm, vif)) {
2282 		channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
2283 				IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
2284 				IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
2285 
2286 		/* set fragmented ebs for fragmented scan on HB channels */
2287 		if (iwl_mvm_is_frag_ebs_supported(mvm)) {
2288 			if (gen_flags &
2289 			    IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED ||
2290 			    (!iwl_mvm_is_cdb_supported(mvm) &&
2291 			     gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED))
2292 				channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
2293 		}
2294 	}
2295 
2296 	chan_param->flags = channel_flags;
2297 	chan_param->count = params->n_channels;
2298 
2299 	ret = iwl_mvm_fill_scan_sched_params(params, tail_v2->schedule,
2300 					     &tail_v2->delay);
2301 	if (ret) {
2302 		mvm->scan_uid_status[uid] = 0;
2303 		return ret;
2304 	}
2305 
2306 	if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
2307 		tail_v2->preq = params->preq;
2308 		direct_scan = tail_v2->direct_scan;
2309 	} else {
2310 		tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part;
2311 		iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq,
2312 						  &params->preq);
2313 		direct_scan = tail_v1->direct_scan;
2314 	}
2315 	iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap);
2316 	iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
2317 				       params->n_channels, ssid_bitmap,
2318 				       cmd_data);
2319 	return 0;
2320 }
2321 
2322 static void
iwl_mvm_scan_umac_fill_general_p_v12(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,u32 version)2323 iwl_mvm_scan_umac_fill_general_p_v12(struct iwl_mvm *mvm,
2324 				     struct iwl_mvm_scan_params *params,
2325 				     struct ieee80211_vif *vif,
2326 				     struct iwl_scan_general_params_v11 *gp,
2327 				     u16 gen_flags, u8 gen_flags2,
2328 				     u32 version)
2329 {
2330 	struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2331 
2332 	iwl_mvm_scan_umac_dwell_v11(mvm, gp, params);
2333 
2334 	IWL_DEBUG_SCAN(mvm, "General: flags=0x%x, flags2=0x%x\n",
2335 		       gen_flags, gen_flags2);
2336 
2337 	gp->flags = cpu_to_le16(gen_flags);
2338 	gp->flags2 = gen_flags2;
2339 
2340 	if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1)
2341 		gp->num_of_fragments[SCAN_LB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2342 	if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2)
2343 		gp->num_of_fragments[SCAN_HB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2344 
2345 	if (version < 16) {
2346 		gp->scan_start_mac_or_link_id = scan_vif->id;
2347 	} else {
2348 		struct iwl_mvm_vif_link_info *link_info;
2349 		u8 link_id = 0;
2350 
2351 		/* Use one of the active link (if any). In the future it would
2352 		 * be possible that the link ID would be part of the scan
2353 		 * request coming from upper layers so we would need to use it.
2354 		 */
2355 		if (vif->active_links)
2356 			link_id = ffs(vif->active_links) - 1;
2357 
2358 		link_info = scan_vif->link[link_id];
2359 		if (!WARN_ON(!link_info))
2360 			gp->scan_start_mac_or_link_id = link_info->fw_link_id;
2361 	}
2362 }
2363 
2364 static void
iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params * params,struct iwl_scan_probe_params_v3 * pp)2365 iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params *params,
2366 				  struct iwl_scan_probe_params_v3 *pp)
2367 {
2368 	pp->preq = params->preq;
2369 	pp->ssid_num = params->n_ssids;
2370 	iwl_scan_build_ssids(params, pp->direct_scan, NULL);
2371 }
2372 
2373 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)2374 iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params *params,
2375 				  struct iwl_scan_probe_params_v4 *pp,
2376 				  u32 *bitmap_ssid)
2377 {
2378 	pp->preq = params->preq;
2379 	iwl_scan_build_ssids(params, pp->direct_scan, bitmap_ssid);
2380 }
2381 
2382 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)2383 iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm *mvm,
2384 			       struct iwl_mvm_scan_params *params,
2385 			       struct ieee80211_vif *vif,
2386 			       struct iwl_scan_channel_params_v4 *cp,
2387 			       u32 channel_cfg_flags)
2388 {
2389 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2390 	cp->count = params->n_channels;
2391 	cp->num_of_aps_override = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2392 
2393 	iwl_mvm_umac_scan_cfg_channels_v4(mvm, params->channels, cp,
2394 					  params->n_channels,
2395 					  channel_cfg_flags,
2396 					  vif->type);
2397 }
2398 
2399 static void
iwl_mvm_scan_umac_fill_ch_p_v7(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,struct iwl_scan_channel_params_v7 * cp,u32 channel_cfg_flags,u32 version)2400 iwl_mvm_scan_umac_fill_ch_p_v7(struct iwl_mvm *mvm,
2401 			       struct iwl_mvm_scan_params *params,
2402 			       struct ieee80211_vif *vif,
2403 			       struct iwl_scan_channel_params_v7 *cp,
2404 			       u32 channel_cfg_flags,
2405 			       u32 version)
2406 {
2407 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2408 	cp->count = params->n_channels;
2409 	cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2410 	cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2411 
2412 	iwl_mvm_umac_scan_cfg_channels_v7(mvm, params->channels, cp,
2413 					  params->n_channels,
2414 					  channel_cfg_flags,
2415 					  vif->type, version);
2416 
2417 	if (params->enable_6ghz_passive) {
2418 		struct ieee80211_supported_band *sband =
2419 			&mvm->nvm_data->bands[NL80211_BAND_6GHZ];
2420 		u32 i;
2421 
2422 		for (i = 0; i < sband->n_channels; i++) {
2423 			struct ieee80211_channel *channel =
2424 				&sband->channels[i];
2425 
2426 			struct iwl_scan_channel_cfg_umac *cfg =
2427 				&cp->channel_config[cp->count];
2428 
2429 			if (!cfg80211_channel_is_psc(channel))
2430 				continue;
2431 
2432 			cfg->v5.channel_num = channel->hw_value;
2433 			cfg->v5.iter_count = 1;
2434 			cfg->v5.iter_interval = 0;
2435 
2436 			if (version < 17) {
2437 				cfg->flags = 0;
2438 				cfg->v2.band = PHY_BAND_6;
2439 			} else {
2440 				cfg->flags = cpu_to_le32(PHY_BAND_6 <<
2441 							 IWL_CHAN_CFG_FLAGS_BAND_POS);
2442 				cfg->v5.psd_20 =
2443 					IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
2444 			}
2445 			cp->count++;
2446 		}
2447 	}
2448 }
2449 
iwl_mvm_scan_umac_v12(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2450 static int iwl_mvm_scan_umac_v12(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2451 				 struct iwl_mvm_scan_params *params, int type,
2452 				 int uid)
2453 {
2454 	struct iwl_scan_req_umac_v12 *cmd = mvm->scan_cmd;
2455 	struct iwl_scan_req_params_v12 *scan_p = &cmd->scan_params;
2456 	int ret;
2457 	u16 gen_flags;
2458 
2459 	mvm->scan_uid_status[uid] = type;
2460 
2461 	cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2462 	cmd->uid = cpu_to_le32(uid);
2463 
2464 	gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2465 	iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
2466 					     &scan_p->general_params,
2467 					     gen_flags, 0, 12);
2468 
2469 	ret = iwl_mvm_fill_scan_sched_params(params,
2470 					     scan_p->periodic_params.schedule,
2471 					     &scan_p->periodic_params.delay);
2472 	if (ret)
2473 		return ret;
2474 
2475 	iwl_mvm_scan_umac_fill_probe_p_v3(params, &scan_p->probe_params);
2476 	iwl_mvm_scan_umac_fill_ch_p_v4(mvm, params, vif,
2477 				       &scan_p->channel_params, 0);
2478 
2479 	return 0;
2480 }
2481 
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)2482 static int iwl_mvm_scan_umac_v14_and_above(struct iwl_mvm *mvm,
2483 					   struct ieee80211_vif *vif,
2484 					   struct iwl_mvm_scan_params *params,
2485 					   int type, int uid, u32 version)
2486 {
2487 	struct iwl_scan_req_umac_v17 *cmd = mvm->scan_cmd;
2488 	struct iwl_scan_req_params_v17 *scan_p = &cmd->scan_params;
2489 	struct iwl_scan_channel_params_v7 *cp = &scan_p->channel_params;
2490 	struct iwl_scan_probe_params_v4 *pb = &scan_p->probe_params;
2491 	int ret;
2492 	u16 gen_flags;
2493 	u8 gen_flags2;
2494 	u32 bitmap_ssid = 0;
2495 
2496 	mvm->scan_uid_status[uid] = type;
2497 
2498 	cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2499 	cmd->uid = cpu_to_le32(uid);
2500 
2501 	gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2502 
2503 	if (version >= 15)
2504 		gen_flags2 = iwl_mvm_scan_umac_flags2(mvm, params, vif, type);
2505 	else
2506 		gen_flags2 = 0;
2507 
2508 	iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
2509 					     &scan_p->general_params,
2510 					     gen_flags, gen_flags2, version);
2511 
2512 	ret = iwl_mvm_fill_scan_sched_params(params,
2513 					     scan_p->periodic_params.schedule,
2514 					     &scan_p->periodic_params.delay);
2515 	if (ret)
2516 		return ret;
2517 
2518 	if (!params->scan_6ghz) {
2519 		iwl_mvm_scan_umac_fill_probe_p_v4(params,
2520 						  &scan_p->probe_params,
2521 						  &bitmap_ssid);
2522 		iwl_mvm_scan_umac_fill_ch_p_v7(mvm, params, vif,
2523 					       &scan_p->channel_params,
2524 					       bitmap_ssid,
2525 					       version);
2526 		return 0;
2527 	} else {
2528 		pb->preq = params->preq;
2529 	}
2530 
2531 	cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2532 	cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2533 	cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2534 
2535 	iwl_mvm_umac_scan_fill_6g_chan_list(mvm, params, pb);
2536 
2537 	cp->count = iwl_mvm_umac_scan_cfg_channels_v7_6g(mvm, params,
2538 							 params->n_channels,
2539 							 pb, cp, vif->type,
2540 							 version);
2541 	if (!cp->count) {
2542 		mvm->scan_uid_status[uid] = 0;
2543 		return -EINVAL;
2544 	}
2545 
2546 	if (!params->n_ssids ||
2547 	    (params->n_ssids == 1 && !params->ssids[0].ssid_len))
2548 		cp->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER;
2549 
2550 	return 0;
2551 }
2552 
iwl_mvm_scan_umac_v14(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2553 static int iwl_mvm_scan_umac_v14(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2554 				 struct iwl_mvm_scan_params *params, int type,
2555 				 int uid)
2556 {
2557 	return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 14);
2558 }
2559 
iwl_mvm_scan_umac_v15(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2560 static int iwl_mvm_scan_umac_v15(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2561 				 struct iwl_mvm_scan_params *params, int type,
2562 				 int uid)
2563 {
2564 	return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 15);
2565 }
2566 
iwl_mvm_scan_umac_v16(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2567 static int iwl_mvm_scan_umac_v16(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2568 				 struct iwl_mvm_scan_params *params, int type,
2569 				 int uid)
2570 {
2571 	return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 16);
2572 }
2573 
iwl_mvm_scan_umac_v17(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2574 static int iwl_mvm_scan_umac_v17(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2575 				 struct iwl_mvm_scan_params *params, int type,
2576 				 int uid)
2577 {
2578 	return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 17);
2579 }
2580 
iwl_mvm_num_scans(struct iwl_mvm * mvm)2581 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
2582 {
2583 	return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
2584 }
2585 
iwl_mvm_check_running_scans(struct iwl_mvm * mvm,int type)2586 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
2587 {
2588 	bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2589 					 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2590 
2591 	/* This looks a bit arbitrary, but the idea is that if we run
2592 	 * out of possible simultaneous scans and the userspace is
2593 	 * trying to run a scan type that is already running, we
2594 	 * return -EBUSY.  But if the userspace wants to start a
2595 	 * different type of scan, we stop the opposite type to make
2596 	 * space for the new request.  The reason is backwards
2597 	 * compatibility with old wpa_supplicant that wouldn't stop a
2598 	 * scheduled scan before starting a normal scan.
2599 	 */
2600 
2601 	/* FW supports only a single periodic scan */
2602 	if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2603 	    mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT))
2604 		return -EBUSY;
2605 
2606 	if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
2607 		return 0;
2608 
2609 	/* Use a switch, even though this is a bitmask, so that more
2610 	 * than one bits set will fall in default and we will warn.
2611 	 */
2612 	switch (type) {
2613 	case IWL_MVM_SCAN_REGULAR:
2614 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2615 			return -EBUSY;
2616 		return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2617 	case IWL_MVM_SCAN_SCHED:
2618 		if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2619 			return -EBUSY;
2620 		return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2621 	case IWL_MVM_SCAN_NETDETECT:
2622 		/* For non-unified images, there's no need to stop
2623 		 * anything for net-detect since the firmware is
2624 		 * restarted anyway.  This way, any sched scans that
2625 		 * were running will be restarted when we resume.
2626 		 */
2627 		if (!unified_image)
2628 			return 0;
2629 
2630 		/* If this is a unified image and we ran out of scans,
2631 		 * we need to stop something.  Prefer stopping regular
2632 		 * scans, because the results are useless at this
2633 		 * point, and we should be able to keep running
2634 		 * another scheduled scan while suspended.
2635 		 */
2636 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2637 			return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
2638 						 true);
2639 		if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2640 			return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
2641 						 true);
2642 		/* Something is wrong if no scan was running but we
2643 		 * ran out of scans.
2644 		 */
2645 		fallthrough;
2646 	default:
2647 		WARN_ON(1);
2648 		break;
2649 	}
2650 
2651 	return -EIO;
2652 }
2653 
2654 #define SCAN_TIMEOUT 30000
2655 
iwl_mvm_scan_timeout_wk(struct work_struct * work)2656 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
2657 {
2658 	struct delayed_work *delayed_work = to_delayed_work(work);
2659 	struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
2660 					   scan_timeout_dwork);
2661 
2662 	IWL_ERR(mvm, "regular scan timed out\n");
2663 
2664 	iwl_force_nmi(mvm->trans);
2665 }
2666 
iwl_mvm_fill_scan_type(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2667 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm,
2668 				   struct iwl_mvm_scan_params *params,
2669 				   struct ieee80211_vif *vif)
2670 {
2671 	if (iwl_mvm_is_cdb_supported(mvm)) {
2672 		params->type =
2673 			iwl_mvm_get_scan_type_band(mvm, vif,
2674 						   NL80211_BAND_2GHZ);
2675 		params->hb_type =
2676 			iwl_mvm_get_scan_type_band(mvm, vif,
2677 						   NL80211_BAND_5GHZ);
2678 	} else {
2679 		params->type = iwl_mvm_get_scan_type(mvm, vif);
2680 	}
2681 }
2682 
2683 struct iwl_scan_umac_handler {
2684 	u8 version;
2685 	int (*handler)(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2686 		       struct iwl_mvm_scan_params *params, int type, int uid);
2687 };
2688 
2689 #define IWL_SCAN_UMAC_HANDLER(_ver) {		\
2690 	.version = _ver,			\
2691 	.handler = iwl_mvm_scan_umac_v##_ver,	\
2692 }
2693 
2694 static const struct iwl_scan_umac_handler iwl_scan_umac_handlers[] = {
2695 	/* set the newest version first to shorten the list traverse time */
2696 	IWL_SCAN_UMAC_HANDLER(17),
2697 	IWL_SCAN_UMAC_HANDLER(16),
2698 	IWL_SCAN_UMAC_HANDLER(15),
2699 	IWL_SCAN_UMAC_HANDLER(14),
2700 	IWL_SCAN_UMAC_HANDLER(12),
2701 };
2702 
iwl_mvm_mei_scan_work(struct work_struct * wk)2703 static void iwl_mvm_mei_scan_work(struct work_struct *wk)
2704 {
2705 	struct iwl_mei_scan_filter *scan_filter =
2706 		container_of(wk, struct iwl_mei_scan_filter, scan_work);
2707 	struct iwl_mvm *mvm =
2708 		container_of(scan_filter, struct iwl_mvm, mei_scan_filter);
2709 	struct iwl_mvm_csme_conn_info *info;
2710 	struct sk_buff *skb;
2711 	u8 bssid[ETH_ALEN];
2712 
2713 	mutex_lock(&mvm->mutex);
2714 	info = iwl_mvm_get_csme_conn_info(mvm);
2715 	memcpy(bssid, info->conn_info.bssid, ETH_ALEN);
2716 	mutex_unlock(&mvm->mutex);
2717 
2718 	while ((skb = skb_dequeue(&scan_filter->scan_res))) {
2719 		struct ieee80211_mgmt *mgmt = (void *)skb->data;
2720 
2721 		if (!memcmp(mgmt->bssid, bssid, ETH_ALEN))
2722 			ieee80211_rx_irqsafe(mvm->hw, skb);
2723 		else
2724 			kfree_skb(skb);
2725 	}
2726 }
2727 
iwl_mvm_mei_scan_filter_init(struct iwl_mei_scan_filter * mei_scan_filter)2728 void iwl_mvm_mei_scan_filter_init(struct iwl_mei_scan_filter *mei_scan_filter)
2729 {
2730 	skb_queue_head_init(&mei_scan_filter->scan_res);
2731 	INIT_WORK(&mei_scan_filter->scan_work, iwl_mvm_mei_scan_work);
2732 }
2733 
2734 /* In case CSME is connected and has link protection set, this function will
2735  * override the scan request to scan only the associated channel and only for
2736  * the associated SSID.
2737  */
iwl_mvm_mei_limited_scan(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params)2738 static void iwl_mvm_mei_limited_scan(struct iwl_mvm *mvm,
2739 				     struct iwl_mvm_scan_params *params)
2740 {
2741 	struct iwl_mvm_csme_conn_info *info = iwl_mvm_get_csme_conn_info(mvm);
2742 	struct iwl_mei_conn_info *conn_info;
2743 	struct ieee80211_channel *chan;
2744 	int scan_iters, i;
2745 
2746 	if (!info) {
2747 		IWL_DEBUG_SCAN(mvm, "mei_limited_scan: no connection info\n");
2748 		return;
2749 	}
2750 
2751 	conn_info = &info->conn_info;
2752 	if (!info->conn_info.lp_state || !info->conn_info.ssid_len)
2753 		return;
2754 
2755 	if (!params->n_channels || !params->n_ssids)
2756 		return;
2757 
2758 	mvm->mei_scan_filter.is_mei_limited_scan = true;
2759 
2760 	chan = ieee80211_get_channel(mvm->hw->wiphy,
2761 				     ieee80211_channel_to_frequency(conn_info->channel,
2762 								    conn_info->band));
2763 	if (!chan) {
2764 		IWL_DEBUG_SCAN(mvm,
2765 			       "Failed to get CSME channel (chan=%u band=%u)\n",
2766 			       conn_info->channel, conn_info->band);
2767 		return;
2768 	}
2769 
2770 	/* The mei filtered scan must find the AP, otherwise CSME will
2771 	 * take the NIC ownership. Add several iterations on the channel to
2772 	 * make the scan more robust.
2773 	 */
2774 	scan_iters = min(IWL_MEI_SCAN_NUM_ITER, params->n_channels);
2775 	params->n_channels = scan_iters;
2776 	for (i = 0; i < scan_iters; i++)
2777 		params->channels[i] = chan;
2778 
2779 	IWL_DEBUG_SCAN(mvm, "Mei scan: num iterations=%u\n", scan_iters);
2780 
2781 	params->n_ssids = 1;
2782 	params->ssids[0].ssid_len = conn_info->ssid_len;
2783 	memcpy(params->ssids[0].ssid, conn_info->ssid, conn_info->ssid_len);
2784 }
2785 
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)2786 static int iwl_mvm_build_scan_cmd(struct iwl_mvm *mvm,
2787 				  struct ieee80211_vif *vif,
2788 				  struct iwl_host_cmd *hcmd,
2789 				  struct iwl_mvm_scan_params *params,
2790 				  int type)
2791 {
2792 	int uid, i, err;
2793 	u8 scan_ver;
2794 
2795 	lockdep_assert_held(&mvm->mutex);
2796 	memset(mvm->scan_cmd, 0, mvm->scan_cmd_size);
2797 
2798 	iwl_mvm_mei_limited_scan(mvm, params);
2799 
2800 	if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2801 		hcmd->id = SCAN_OFFLOAD_REQUEST_CMD;
2802 
2803 		return iwl_mvm_scan_lmac(mvm, vif, params);
2804 	}
2805 
2806 	uid = iwl_mvm_scan_uid_by_status(mvm, 0);
2807 	if (uid < 0)
2808 		return uid;
2809 
2810 	hcmd->id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_REQ_UMAC);
2811 
2812 	scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
2813 					 IWL_FW_CMD_VER_UNKNOWN);
2814 
2815 	for (i = 0; i < ARRAY_SIZE(iwl_scan_umac_handlers); i++) {
2816 		const struct iwl_scan_umac_handler *ver_handler =
2817 			&iwl_scan_umac_handlers[i];
2818 
2819 		if (ver_handler->version != scan_ver)
2820 			continue;
2821 
2822 		return ver_handler->handler(mvm, vif, params, type, uid);
2823 	}
2824 
2825 	err = iwl_mvm_scan_umac(mvm, vif, params, type, uid);
2826 	if (err)
2827 		return err;
2828 
2829 	return uid;
2830 }
2831 
2832 struct iwl_mvm_scan_respect_p2p_go_iter_data {
2833 	struct ieee80211_vif *current_vif;
2834 	bool p2p_go;
2835 	enum nl80211_band band;
2836 };
2837 
iwl_mvm_scan_respect_p2p_go_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)2838 static void iwl_mvm_scan_respect_p2p_go_iter(void *_data, u8 *mac,
2839 					     struct ieee80211_vif *vif)
2840 {
2841 	struct iwl_mvm_scan_respect_p2p_go_iter_data *data = _data;
2842 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2843 
2844 	/* exclude the given vif */
2845 	if (vif == data->current_vif)
2846 		return;
2847 
2848 	if (vif->type == NL80211_IFTYPE_AP && vif->p2p) {
2849 		u32 link_id;
2850 
2851 		for (link_id = 0;
2852 		     link_id < ARRAY_SIZE(mvmvif->link);
2853 		     link_id++) {
2854 			struct iwl_mvm_vif_link_info *link =
2855 				mvmvif->link[link_id];
2856 
2857 			if (link && link->phy_ctxt->id < NUM_PHY_CTX &&
2858 			    (data->band == NUM_NL80211_BANDS ||
2859 			     link->phy_ctxt->channel->band == data->band)) {
2860 				data->p2p_go = true;
2861 				break;
2862 			}
2863 		}
2864 	}
2865 }
2866 
_iwl_mvm_get_respect_p2p_go(struct iwl_mvm * mvm,struct ieee80211_vif * vif,bool low_latency,enum nl80211_band band)2867 static bool _iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2868 					struct ieee80211_vif *vif,
2869 					bool low_latency,
2870 					enum nl80211_band band)
2871 {
2872 	struct iwl_mvm_scan_respect_p2p_go_iter_data data = {
2873 		.current_vif = vif,
2874 		.p2p_go = false,
2875 		.band = band,
2876 	};
2877 
2878 	if (!low_latency)
2879 		return false;
2880 
2881 	ieee80211_iterate_active_interfaces_atomic(mvm->hw,
2882 						   IEEE80211_IFACE_ITER_NORMAL,
2883 						   iwl_mvm_scan_respect_p2p_go_iter,
2884 						   &data);
2885 
2886 	return data.p2p_go;
2887 }
2888 
iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum nl80211_band band)2889 static bool iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm *mvm,
2890 					    struct ieee80211_vif *vif,
2891 					    enum nl80211_band band)
2892 {
2893 	bool low_latency = iwl_mvm_low_latency_band(mvm, band);
2894 
2895 	return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency, band);
2896 }
2897 
iwl_mvm_get_respect_p2p_go(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2898 static bool iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2899 				       struct ieee80211_vif *vif)
2900 {
2901 	bool low_latency = iwl_mvm_low_latency(mvm);
2902 
2903 	return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency,
2904 					   NUM_NL80211_BANDS);
2905 }
2906 
iwl_mvm_fill_respect_p2p_go(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2907 static void iwl_mvm_fill_respect_p2p_go(struct iwl_mvm *mvm,
2908 					struct iwl_mvm_scan_params *params,
2909 					struct ieee80211_vif *vif)
2910 {
2911 	if (iwl_mvm_is_cdb_supported(mvm)) {
2912 		params->respect_p2p_go =
2913 			iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2914 							NL80211_BAND_2GHZ);
2915 		params->respect_p2p_go_hb =
2916 			iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2917 							NL80211_BAND_5GHZ);
2918 	} else {
2919 		params->respect_p2p_go = iwl_mvm_get_respect_p2p_go(mvm, vif);
2920 	}
2921 }
2922 
iwl_mvm_reg_scan_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_scan_request * req,struct ieee80211_scan_ies * ies)2923 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2924 			   struct cfg80211_scan_request *req,
2925 			   struct ieee80211_scan_ies *ies)
2926 {
2927 	struct iwl_host_cmd hcmd = {
2928 		.len = { iwl_mvm_scan_size(mvm), },
2929 		.data = { mvm->scan_cmd, },
2930 		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
2931 	};
2932 	struct iwl_mvm_scan_params params = {};
2933 	int ret, uid;
2934 	struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
2935 
2936 	lockdep_assert_held(&mvm->mutex);
2937 
2938 	if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2939 		IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
2940 		return -EBUSY;
2941 	}
2942 
2943 	ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
2944 	if (ret)
2945 		return ret;
2946 
2947 	/* we should have failed registration if scan_cmd was NULL */
2948 	if (WARN_ON(!mvm->scan_cmd))
2949 		return -ENOMEM;
2950 
2951 	if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
2952 		return -ENOBUFS;
2953 
2954 	params.n_ssids = req->n_ssids;
2955 	params.flags = req->flags;
2956 	params.n_channels = req->n_channels;
2957 	params.delay = 0;
2958 	params.ssids = req->ssids;
2959 	params.channels = req->channels;
2960 	params.mac_addr = req->mac_addr;
2961 	params.mac_addr_mask = req->mac_addr_mask;
2962 	params.no_cck = req->no_cck;
2963 	params.pass_all = true;
2964 	params.n_match_sets = 0;
2965 	params.match_sets = NULL;
2966 	ether_addr_copy(params.bssid, req->bssid);
2967 
2968 	params.scan_plans = &scan_plan;
2969 	params.n_scan_plans = 1;
2970 
2971 	params.n_6ghz_params = req->n_6ghz_params;
2972 	params.scan_6ghz_params = req->scan_6ghz_params;
2973 	params.scan_6ghz = req->scan_6ghz;
2974 	iwl_mvm_fill_scan_type(mvm, &params, vif);
2975 	iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
2976 
2977 	if (req->duration)
2978 		params.iter_notif = true;
2979 
2980 	iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
2981 
2982 	iwl_mvm_scan_6ghz_passive_scan(mvm, &params, vif);
2983 
2984 	uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params,
2985 				     IWL_MVM_SCAN_REGULAR);
2986 
2987 	if (uid < 0)
2988 		return uid;
2989 
2990 	iwl_mvm_pause_tcm(mvm, false);
2991 
2992 	ret = iwl_mvm_send_cmd(mvm, &hcmd);
2993 	if (ret) {
2994 		/* If the scan failed, it usually means that the FW was unable
2995 		 * to allocate the time events. Warn on it, but maybe we
2996 		 * should try to send the command again with different params.
2997 		 */
2998 		IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
2999 		iwl_mvm_resume_tcm(mvm);
3000 		mvm->scan_uid_status[uid] = 0;
3001 		return ret;
3002 	}
3003 
3004 	IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
3005 	mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
3006 	mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
3007 
3008 	if (params.enable_6ghz_passive)
3009 		mvm->last_6ghz_passive_scan_jiffies = jiffies;
3010 
3011 	schedule_delayed_work(&mvm->scan_timeout_dwork,
3012 			      msecs_to_jiffies(SCAN_TIMEOUT));
3013 
3014 	return 0;
3015 }
3016 
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)3017 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
3018 			     struct ieee80211_vif *vif,
3019 			     struct cfg80211_sched_scan_request *req,
3020 			     struct ieee80211_scan_ies *ies,
3021 			     int type)
3022 {
3023 	struct iwl_host_cmd hcmd = {
3024 		.len = { iwl_mvm_scan_size(mvm), },
3025 		.data = { mvm->scan_cmd, },
3026 		.dataflags = { IWL_HCMD_DFL_NOCOPY, },
3027 	};
3028 	struct iwl_mvm_scan_params params = {};
3029 	int ret, uid;
3030 	int i, j;
3031 	bool non_psc_included = false;
3032 
3033 	lockdep_assert_held(&mvm->mutex);
3034 
3035 	if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
3036 		IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
3037 		return -EBUSY;
3038 	}
3039 
3040 	ret = iwl_mvm_check_running_scans(mvm, type);
3041 	if (ret)
3042 		return ret;
3043 
3044 	/* we should have failed registration if scan_cmd was NULL */
3045 	if (WARN_ON(!mvm->scan_cmd))
3046 		return -ENOMEM;
3047 
3048 
3049 	params.n_ssids = req->n_ssids;
3050 	params.flags = req->flags;
3051 	params.n_channels = req->n_channels;
3052 	params.ssids = req->ssids;
3053 	params.channels = req->channels;
3054 	params.mac_addr = req->mac_addr;
3055 	params.mac_addr_mask = req->mac_addr_mask;
3056 	params.no_cck = false;
3057 	params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
3058 	params.n_match_sets = req->n_match_sets;
3059 	params.match_sets = req->match_sets;
3060 	eth_broadcast_addr(params.bssid);
3061 	if (!req->n_scan_plans)
3062 		return -EINVAL;
3063 
3064 	params.n_scan_plans = req->n_scan_plans;
3065 	params.scan_plans = req->scan_plans;
3066 
3067 	iwl_mvm_fill_scan_type(mvm, &params, vif);
3068 	iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
3069 
3070 	/* In theory, LMAC scans can handle a 32-bit delay, but since
3071 	 * waiting for over 18 hours to start the scan is a bit silly
3072 	 * and to keep it aligned with UMAC scans (which only support
3073 	 * 16-bit delays), trim it down to 16-bits.
3074 	 */
3075 	if (req->delay > U16_MAX) {
3076 		IWL_DEBUG_SCAN(mvm,
3077 			       "delay value is > 16-bits, set to max possible\n");
3078 		params.delay = U16_MAX;
3079 	} else {
3080 		params.delay = req->delay;
3081 	}
3082 
3083 	ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
3084 	if (ret)
3085 		return ret;
3086 
3087 	iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
3088 
3089 	/* for 6 GHZ band only PSC channels need to be added */
3090 	for (i = 0; i < params.n_channels; i++) {
3091 		struct ieee80211_channel *channel = params.channels[i];
3092 
3093 		if (channel->band == NL80211_BAND_6GHZ &&
3094 		    !cfg80211_channel_is_psc(channel)) {
3095 			non_psc_included = true;
3096 			break;
3097 		}
3098 	}
3099 
3100 	if (non_psc_included) {
3101 		params.channels = kmemdup(params.channels,
3102 					  sizeof(params.channels[0]) *
3103 					  params.n_channels,
3104 					  GFP_KERNEL);
3105 		if (!params.channels)
3106 			return -ENOMEM;
3107 
3108 		for (i = j = 0; i < params.n_channels; i++) {
3109 			if (params.channels[i]->band == NL80211_BAND_6GHZ &&
3110 			    !cfg80211_channel_is_psc(params.channels[i]))
3111 				continue;
3112 			params.channels[j++] = params.channels[i];
3113 		}
3114 		params.n_channels = j;
3115 	}
3116 
3117 	if (non_psc_included &&
3118 	    !iwl_mvm_scan_fits(mvm, req->n_ssids, ies, params.n_channels)) {
3119 		kfree(params.channels);
3120 		return -ENOBUFS;
3121 	}
3122 
3123 	uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params, type);
3124 
3125 	if (non_psc_included)
3126 		kfree(params.channels);
3127 	if (uid < 0)
3128 		return uid;
3129 
3130 	ret = iwl_mvm_send_cmd(mvm, &hcmd);
3131 	if (!ret) {
3132 		IWL_DEBUG_SCAN(mvm,
3133 			       "Sched scan request was sent successfully\n");
3134 		mvm->scan_status |= type;
3135 	} else {
3136 		/* If the scan failed, it usually means that the FW was unable
3137 		 * to allocate the time events. Warn on it, but maybe we
3138 		 * should try to send the command again with different params.
3139 		 */
3140 		IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
3141 		mvm->scan_uid_status[uid] = 0;
3142 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3143 	}
3144 
3145 	return ret;
3146 }
3147 
iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3148 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
3149 					 struct iwl_rx_cmd_buffer *rxb)
3150 {
3151 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
3152 	struct iwl_umac_scan_complete *notif = (void *)pkt->data;
3153 	u32 uid = __le32_to_cpu(notif->uid);
3154 	bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
3155 
3156 	mvm->mei_scan_filter.is_mei_limited_scan = false;
3157 
3158 	if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
3159 		return;
3160 
3161 	/* if the scan is already stopping, we don't need to notify mac80211 */
3162 	if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
3163 		struct cfg80211_scan_info info = {
3164 			.aborted = aborted,
3165 			.scan_start_tsf = mvm->scan_start,
3166 		};
3167 
3168 		memcpy(info.tsf_bssid, mvm->scan_vif->deflink.bssid, ETH_ALEN);
3169 		ieee80211_scan_completed(mvm->hw, &info);
3170 		mvm->scan_vif = NULL;
3171 		cancel_delayed_work(&mvm->scan_timeout_dwork);
3172 		iwl_mvm_resume_tcm(mvm);
3173 	} else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
3174 		ieee80211_sched_scan_stopped(mvm->hw);
3175 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3176 	}
3177 
3178 	mvm->scan_status &= ~mvm->scan_uid_status[uid];
3179 	IWL_DEBUG_SCAN(mvm,
3180 		       "Scan completed, uid %u type %u, status %s, EBS status %s\n",
3181 		       uid, mvm->scan_uid_status[uid],
3182 		       notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
3183 				"completed" : "aborted",
3184 		       iwl_mvm_ebs_status_str(notif->ebs_status));
3185 	IWL_DEBUG_SCAN(mvm,
3186 		       "Last line %d, Last iteration %d, Time from last iteration %d\n",
3187 		       notif->last_schedule, notif->last_iter,
3188 		       __le32_to_cpu(notif->time_from_last_iter));
3189 
3190 	if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
3191 	    notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
3192 		mvm->last_ebs_successful = false;
3193 
3194 	mvm->scan_uid_status[uid] = 0;
3195 }
3196 
iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3197 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
3198 					      struct iwl_rx_cmd_buffer *rxb)
3199 {
3200 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
3201 	struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
3202 
3203 	mvm->scan_start = le64_to_cpu(notif->start_tsf);
3204 
3205 	IWL_DEBUG_SCAN(mvm,
3206 		       "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
3207 		       notif->status, notif->scanned_channels);
3208 
3209 	if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
3210 		IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
3211 		ieee80211_sched_scan_results(mvm->hw);
3212 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
3213 	}
3214 
3215 	IWL_DEBUG_SCAN(mvm,
3216 		       "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
3217 		       mvm->scan_start);
3218 }
3219 
iwl_mvm_umac_scan_abort(struct iwl_mvm * mvm,int type)3220 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
3221 {
3222 	struct iwl_umac_scan_abort cmd = {};
3223 	int uid, ret;
3224 
3225 	lockdep_assert_held(&mvm->mutex);
3226 
3227 	/* We should always get a valid index here, because we already
3228 	 * checked that this type of scan was running in the generic
3229 	 * code.
3230 	 */
3231 	uid = iwl_mvm_scan_uid_by_status(mvm, type);
3232 	if (WARN_ON_ONCE(uid < 0))
3233 		return uid;
3234 
3235 	cmd.uid = cpu_to_le32(uid);
3236 
3237 	IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
3238 
3239 	ret = iwl_mvm_send_cmd_pdu(mvm,
3240 				   WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_ABORT_UMAC),
3241 				   0, sizeof(cmd), &cmd);
3242 	if (!ret)
3243 		mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
3244 
3245 	return ret;
3246 }
3247 
iwl_mvm_scan_stop_wait(struct iwl_mvm * mvm,int type)3248 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
3249 {
3250 	struct iwl_notification_wait wait_scan_done;
3251 	static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
3252 					      SCAN_OFFLOAD_COMPLETE, };
3253 	int ret;
3254 
3255 	lockdep_assert_held(&mvm->mutex);
3256 
3257 	iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
3258 				   scan_done_notif,
3259 				   ARRAY_SIZE(scan_done_notif),
3260 				   NULL, NULL);
3261 
3262 	IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
3263 
3264 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
3265 		ret = iwl_mvm_umac_scan_abort(mvm, type);
3266 	else
3267 		ret = iwl_mvm_lmac_scan_abort(mvm);
3268 
3269 	if (ret) {
3270 		IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
3271 		iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
3272 		return ret;
3273 	}
3274 
3275 	return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done,
3276 				     1 * HZ);
3277 }
3278 
iwl_scan_req_umac_get_size(u8 scan_ver)3279 static size_t iwl_scan_req_umac_get_size(u8 scan_ver)
3280 {
3281 	switch (scan_ver) {
3282 	case 12:
3283 		return sizeof(struct iwl_scan_req_umac_v12);
3284 	case 14:
3285 	case 15:
3286 	case 16:
3287 	case 17:
3288 		return sizeof(struct iwl_scan_req_umac_v17);
3289 	}
3290 
3291 	return 0;
3292 }
3293 
iwl_mvm_scan_size(struct iwl_mvm * mvm)3294 size_t iwl_mvm_scan_size(struct iwl_mvm *mvm)
3295 {
3296 	int base_size, tail_size;
3297 	u8 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
3298 					    IWL_FW_CMD_VER_UNKNOWN);
3299 
3300 	base_size = iwl_scan_req_umac_get_size(scan_ver);
3301 	if (base_size)
3302 		return base_size;
3303 
3304 
3305 	if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
3306 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
3307 	else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
3308 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
3309 	else if (iwl_mvm_cdb_scan_api(mvm))
3310 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
3311 	else
3312 		base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
3313 
3314 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3315 		if (iwl_mvm_is_scan_ext_chan_supported(mvm))
3316 			tail_size = sizeof(struct iwl_scan_req_umac_tail_v2);
3317 		else
3318 			tail_size = sizeof(struct iwl_scan_req_umac_tail_v1);
3319 
3320 		return base_size +
3321 			sizeof(struct iwl_scan_channel_cfg_umac) *
3322 				mvm->fw->ucode_capa.n_scan_channels +
3323 			tail_size;
3324 	}
3325 	return sizeof(struct iwl_scan_req_lmac) +
3326 		sizeof(struct iwl_scan_channel_cfg_lmac) *
3327 		mvm->fw->ucode_capa.n_scan_channels +
3328 		sizeof(struct iwl_scan_probe_req_v1);
3329 }
3330 
3331 /*
3332  * This function is used in nic restart flow, to inform mac80211 about scans
3333  * that was aborted by restart flow or by an assert.
3334  */
iwl_mvm_report_scan_aborted(struct iwl_mvm * mvm)3335 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
3336 {
3337 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3338 		int uid, i;
3339 
3340 		uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
3341 		if (uid >= 0) {
3342 			struct cfg80211_scan_info info = {
3343 				.aborted = true,
3344 			};
3345 
3346 			cancel_delayed_work(&mvm->scan_timeout_dwork);
3347 
3348 			ieee80211_scan_completed(mvm->hw, &info);
3349 			mvm->scan_uid_status[uid] = 0;
3350 		}
3351 		uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
3352 		if (uid >= 0) {
3353 			/* Sched scan will be restarted by mac80211 in
3354 			 * restart_hw, so do not report if FW is about to be
3355 			 * restarted.
3356 			 */
3357 			if (!mvm->fw_restart)
3358 				ieee80211_sched_scan_stopped(mvm->hw);
3359 			mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3360 			mvm->scan_uid_status[uid] = 0;
3361 		}
3362 		uid = iwl_mvm_scan_uid_by_status(mvm,
3363 						 IWL_MVM_SCAN_STOPPING_REGULAR);
3364 		if (uid >= 0)
3365 			mvm->scan_uid_status[uid] = 0;
3366 
3367 		uid = iwl_mvm_scan_uid_by_status(mvm,
3368 						 IWL_MVM_SCAN_STOPPING_SCHED);
3369 		if (uid >= 0)
3370 			mvm->scan_uid_status[uid] = 0;
3371 
3372 		/* We shouldn't have any UIDs still set.  Loop over all the
3373 		 * UIDs to make sure there's nothing left there and warn if
3374 		 * any is found.
3375 		 */
3376 		for (i = 0; i < mvm->max_scans; i++) {
3377 			if (WARN_ONCE(mvm->scan_uid_status[i],
3378 				      "UMAC scan UID %d status was not cleaned\n",
3379 				      i))
3380 				mvm->scan_uid_status[i] = 0;
3381 		}
3382 	} else {
3383 		if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
3384 			struct cfg80211_scan_info info = {
3385 				.aborted = true,
3386 			};
3387 
3388 			cancel_delayed_work(&mvm->scan_timeout_dwork);
3389 			ieee80211_scan_completed(mvm->hw, &info);
3390 		}
3391 
3392 		/* Sched scan will be restarted by mac80211 in
3393 		 * restart_hw, so do not report if FW is about to be
3394 		 * restarted.
3395 		 */
3396 		if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
3397 		    !mvm->fw_restart) {
3398 			ieee80211_sched_scan_stopped(mvm->hw);
3399 			mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3400 		}
3401 	}
3402 }
3403 
iwl_mvm_scan_stop(struct iwl_mvm * mvm,int type,bool notify)3404 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
3405 {
3406 	int ret;
3407 
3408 	if (!(mvm->scan_status & type))
3409 		return 0;
3410 
3411 	if (iwl_mvm_is_radio_killed(mvm)) {
3412 		ret = 0;
3413 		goto out;
3414 	}
3415 
3416 	ret = iwl_mvm_scan_stop_wait(mvm, type);
3417 	if (!ret)
3418 		mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
3419 out:
3420 	/* Clear the scan status so the next scan requests will
3421 	 * succeed and mark the scan as stopping, so that the Rx
3422 	 * handler doesn't do anything, as the scan was stopped from
3423 	 * above.
3424 	 */
3425 	mvm->scan_status &= ~type;
3426 
3427 	if (type == IWL_MVM_SCAN_REGULAR) {
3428 		cancel_delayed_work(&mvm->scan_timeout_dwork);
3429 		if (notify) {
3430 			struct cfg80211_scan_info info = {
3431 				.aborted = true,
3432 			};
3433 
3434 			ieee80211_scan_completed(mvm->hw, &info);
3435 		}
3436 	} else if (notify) {
3437 		ieee80211_sched_scan_stopped(mvm->hw);
3438 		mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3439 	}
3440 
3441 	return ret;
3442 }
3443