1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Copyright (C) 2012-2014, 2018-2025 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 #include "iwl-utils.h"
15
16 #define IWL_DENSE_EBS_SCAN_RATIO 5
17 #define IWL_SPARSE_EBS_SCAN_RATIO 1
18
19 #define IWL_SCAN_DWELL_ACTIVE 10
20 #define IWL_SCAN_DWELL_PASSIVE 110
21 #define IWL_SCAN_DWELL_FRAGMENTED 44
22 #define IWL_SCAN_DWELL_EXTENDED 90
23 #define IWL_SCAN_NUM_OF_FRAGS 3
24
25 /* adaptive dwell max budget time [TU] for full scan */
26 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300
27 /* adaptive dwell max budget time [TU] for directed scan */
28 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100
29 /* adaptive dwell default high band APs number */
30 #define IWL_SCAN_ADWELL_DEFAULT_HB_N_APS 8
31 /* adaptive dwell default low band APs number */
32 #define IWL_SCAN_ADWELL_DEFAULT_LB_N_APS 2
33 /* adaptive dwell default APs number in social channels (1, 6, 11) */
34 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
35 /* number of scan channels */
36 #define IWL_SCAN_NUM_CHANNELS 112
37 /* adaptive dwell number of APs override mask for p2p friendly GO */
38 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT BIT(20)
39 /* adaptive dwell number of APs override mask for social channels */
40 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT BIT(21)
41 /* adaptive dwell number of APs override for p2p friendly GO channels */
42 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY 10
43 /* adaptive dwell number of APs override for social channels */
44 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS 2
45
46 /* minimal number of 2GHz and 5GHz channels in the regular scan request */
47 #define IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS 4
48
49 /* Number of iterations on the channel for mei filtered scan */
50 #define IWL_MEI_SCAN_NUM_ITER 5U
51
52 #define WFA_TPC_IE_LEN 9
53
54 struct iwl_mvm_scan_timing_params {
55 u32 suspend_time;
56 u32 max_out_time;
57 };
58
59 static struct iwl_mvm_scan_timing_params scan_timing[] = {
60 [IWL_SCAN_TYPE_UNASSOC] = {
61 .suspend_time = 0,
62 .max_out_time = 0,
63 },
64 [IWL_SCAN_TYPE_WILD] = {
65 .suspend_time = 30,
66 .max_out_time = 120,
67 },
68 [IWL_SCAN_TYPE_MILD] = {
69 .suspend_time = 120,
70 .max_out_time = 120,
71 },
72 [IWL_SCAN_TYPE_FRAGMENTED] = {
73 .suspend_time = 95,
74 .max_out_time = 44,
75 },
76 [IWL_SCAN_TYPE_FAST_BALANCE] = {
77 .suspend_time = 30,
78 .max_out_time = 37,
79 },
80 };
81
82 struct iwl_mvm_scan_params {
83 /* For CDB this is low band scan type, for non-CDB - type. */
84 enum iwl_mvm_scan_type type;
85 enum iwl_mvm_scan_type hb_type;
86 u32 n_channels;
87 u16 delay;
88 int n_ssids;
89 struct cfg80211_ssid *ssids;
90 struct ieee80211_channel **channels;
91 u32 flags;
92 u8 *mac_addr;
93 u8 *mac_addr_mask;
94 bool no_cck;
95 bool pass_all;
96 int n_match_sets;
97 struct iwl_scan_probe_req preq;
98 struct cfg80211_match_set *match_sets;
99 int n_scan_plans;
100 struct cfg80211_sched_scan_plan *scan_plans;
101 bool iter_notif;
102 struct cfg80211_scan_6ghz_params *scan_6ghz_params;
103 u32 n_6ghz_params;
104 bool scan_6ghz;
105 bool enable_6ghz_passive;
106 bool respect_p2p_go, respect_p2p_go_hb;
107 s8 tsf_report_link_id;
108 u8 bssid[ETH_ALEN] __aligned(2);
109 };
110
iwl_mvm_get_scan_req_umac_data(struct iwl_mvm * mvm)111 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
112 {
113 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
114
115 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
116 return (void *)&cmd->v8.data;
117
118 if (iwl_mvm_is_adaptive_dwell_supported(mvm))
119 return (void *)&cmd->v7.data;
120
121 if (iwl_mvm_cdb_scan_api(mvm))
122 return (void *)&cmd->v6.data;
123
124 return (void *)&cmd->v1.data;
125 }
126
127 static inline struct iwl_scan_umac_chan_param *
iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm * mvm)128 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm)
129 {
130 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
131
132 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
133 return &cmd->v8.channel;
134
135 if (iwl_mvm_is_adaptive_dwell_supported(mvm))
136 return &cmd->v7.channel;
137
138 if (iwl_mvm_cdb_scan_api(mvm))
139 return &cmd->v6.channel;
140
141 return &cmd->v1.channel;
142 }
143
iwl_mvm_scan_rx_ant(struct iwl_mvm * mvm)144 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
145 {
146 if (mvm->scan_rx_ant != ANT_NONE)
147 return mvm->scan_rx_ant;
148 return iwl_mvm_get_valid_rx_ant(mvm);
149 }
150
iwl_mvm_scan_rx_chain(struct iwl_mvm * mvm)151 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
152 {
153 u16 rx_chain;
154 u8 rx_ant;
155
156 rx_ant = iwl_mvm_scan_rx_ant(mvm);
157 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
158 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
159 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
160 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
161 return cpu_to_le16(rx_chain);
162 }
163
164 static inline __le32
iwl_mvm_scan_rate_n_flags(struct iwl_mvm * mvm,enum nl80211_band band,bool no_cck)165 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
166 bool no_cck)
167 {
168 u32 tx_ant;
169
170 iwl_mvm_toggle_tx_ant(mvm, &mvm->scan_last_antenna_idx);
171 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
172
173 if (band == NL80211_BAND_2GHZ && !no_cck)
174 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK_V1 |
175 tx_ant);
176 else
177 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
178 }
179
iwl_mvm_get_traffic_load(struct iwl_mvm * mvm)180 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
181 {
182 return mvm->tcm.result.global_load;
183 }
184
185 static enum iwl_mvm_traffic_load
iwl_mvm_get_traffic_load_band(struct iwl_mvm * mvm,enum nl80211_band band)186 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band)
187 {
188 return mvm->tcm.result.band_load[band];
189 }
190
191 struct iwl_mvm_scan_iter_data {
192 u32 global_cnt;
193 struct ieee80211_vif *current_vif;
194 bool is_dcm_with_p2p_go;
195 };
196
iwl_mvm_scan_iterator(void * _data,u8 * mac,struct ieee80211_vif * vif)197 static void iwl_mvm_scan_iterator(void *_data, u8 *mac,
198 struct ieee80211_vif *vif)
199 {
200 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
201 struct iwl_mvm_scan_iter_data *data = _data;
202 struct iwl_mvm_vif *curr_mvmvif;
203
204 if (vif->type != NL80211_IFTYPE_P2P_DEVICE &&
205 mvmvif->deflink.phy_ctxt &&
206 mvmvif->deflink.phy_ctxt->id < NUM_PHY_CTX)
207 data->global_cnt += 1;
208
209 if (!data->current_vif || vif == data->current_vif)
210 return;
211
212 curr_mvmvif = iwl_mvm_vif_from_mac80211(data->current_vif);
213
214 if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO &&
215 mvmvif->deflink.phy_ctxt && curr_mvmvif->deflink.phy_ctxt &&
216 mvmvif->deflink.phy_ctxt->id != curr_mvmvif->deflink.phy_ctxt->id)
217 data->is_dcm_with_p2p_go = true;
218 }
219
220 static enum
_iwl_mvm_get_scan_type(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum iwl_mvm_traffic_load load,bool low_latency)221 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
222 struct ieee80211_vif *vif,
223 enum iwl_mvm_traffic_load load,
224 bool low_latency)
225 {
226 struct iwl_mvm_scan_iter_data data = {
227 .current_vif = vif,
228 .is_dcm_with_p2p_go = false,
229 .global_cnt = 0,
230 };
231
232 /*
233 * A scanning AP interface probably wants to generate a survey to do
234 * ACS (automatic channel selection).
235 * Force a non-fragmented scan in that case.
236 */
237 if (vif && ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP)
238 return IWL_SCAN_TYPE_WILD;
239
240 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
241 IEEE80211_IFACE_ITER_NORMAL,
242 iwl_mvm_scan_iterator,
243 &data);
244
245 if (!data.global_cnt)
246 return IWL_SCAN_TYPE_UNASSOC;
247
248 if (fw_has_api(&mvm->fw->ucode_capa,
249 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
250 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
251 (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE))
252 return IWL_SCAN_TYPE_FRAGMENTED;
253
254 /*
255 * in case of DCM with P2P GO set all scan requests as
256 * fast-balance scan
257 */
258 if (vif && vif->type == NL80211_IFTYPE_STATION &&
259 data.is_dcm_with_p2p_go)
260 return IWL_SCAN_TYPE_FAST_BALANCE;
261 }
262
263 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
264 return IWL_SCAN_TYPE_MILD;
265
266 return IWL_SCAN_TYPE_WILD;
267 }
268
269 static enum
iwl_mvm_get_scan_type(struct iwl_mvm * mvm,struct ieee80211_vif * vif)270 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
271 struct ieee80211_vif *vif)
272 {
273 enum iwl_mvm_traffic_load load;
274 bool low_latency;
275
276 load = iwl_mvm_get_traffic_load(mvm);
277 low_latency = iwl_mvm_low_latency(mvm);
278
279 return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
280 }
281
282 static enum
iwl_mvm_get_scan_type_band(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum nl80211_band band)283 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm,
284 struct ieee80211_vif *vif,
285 enum nl80211_band band)
286 {
287 enum iwl_mvm_traffic_load load;
288 bool low_latency;
289
290 load = iwl_mvm_get_traffic_load_band(mvm, band);
291 low_latency = iwl_mvm_low_latency_band(mvm, band);
292
293 return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
294 }
295
iwl_mvm_rrm_scan_needed(struct iwl_mvm * mvm)296 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
297 {
298 /* require rrm scan whenever the fw supports it */
299 return fw_has_capa(&mvm->fw->ucode_capa,
300 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
301 }
302
iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm * mvm)303 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
304 {
305 int max_probe_len;
306
307 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
308
309 /* we create the 802.11 header SSID element and WFA TPC element */
310 max_probe_len -= 24 + 2 + WFA_TPC_IE_LEN;
311
312 /* DS parameter set element is added on 2.4GHZ band if required */
313 if (iwl_mvm_rrm_scan_needed(mvm))
314 max_probe_len -= 3;
315
316 return max_probe_len;
317 }
318
iwl_mvm_max_scan_ie_len(struct iwl_mvm * mvm)319 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
320 {
321 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
322
323 /* TODO: [BUG] This function should return the maximum allowed size of
324 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
325 * in the same command. So the correct implementation of this function
326 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
327 * command has only 512 bytes and it would leave us with about 240
328 * bytes for scan IEs, which is clearly not enough. So meanwhile
329 * we will report an incorrect value. This may result in a failure to
330 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
331 * functions with -ENOBUFS, if a large enough probe will be provided.
332 */
333 return max_ie_len;
334 }
335
iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)336 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
337 struct iwl_rx_cmd_buffer *rxb)
338 {
339 struct iwl_rx_packet *pkt = rxb_addr(rxb);
340 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
341
342 IWL_DEBUG_SCAN(mvm,
343 "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
344 notif->status, notif->scanned_channels);
345
346 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
347 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
348 ieee80211_sched_scan_results(mvm->hw);
349 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
350 }
351 }
352
iwl_mvm_rx_scan_match_found(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)353 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
354 struct iwl_rx_cmd_buffer *rxb)
355 {
356 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
357 ieee80211_sched_scan_results(mvm->hw);
358 }
359
iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)360 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
361 {
362 switch (status) {
363 case IWL_SCAN_EBS_SUCCESS:
364 return "successful";
365 case IWL_SCAN_EBS_INACTIVE:
366 return "inactive";
367 case IWL_SCAN_EBS_FAILED:
368 case IWL_SCAN_EBS_CHAN_NOT_FOUND:
369 default:
370 return "failed";
371 }
372 }
373
iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)374 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
375 struct iwl_rx_cmd_buffer *rxb)
376 {
377 struct iwl_rx_packet *pkt = rxb_addr(rxb);
378 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
379 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
380
381 /* If this happens, the firmware has mistakenly sent an LMAC
382 * notification during UMAC scans -- warn and ignore it.
383 */
384 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
385 IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
386 return;
387
388 /* scan status must be locked for proper checking */
389 lockdep_assert_held(&mvm->mutex);
390
391 /* We first check if we were stopping a scan, in which case we
392 * just clear the stopping flag. Then we check if it was a
393 * firmware initiated stop, in which case we need to inform
394 * mac80211.
395 * Note that we can have a stopping and a running scan
396 * simultaneously, but we can't have two different types of
397 * scans stopping or running at the same time (since LMAC
398 * doesn't support it).
399 */
400
401 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
402 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
403
404 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
405 aborted ? "aborted" : "completed",
406 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
407 IWL_DEBUG_SCAN(mvm,
408 "Last line %d, Last iteration %d, Time after last iteration %d\n",
409 scan_notif->last_schedule_line,
410 scan_notif->last_schedule_iteration,
411 __le32_to_cpu(scan_notif->time_after_last_iter));
412
413 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
414 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
415 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
416 aborted ? "aborted" : "completed",
417 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
418
419 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
420 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
421 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
422
423 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
424 aborted ? "aborted" : "completed",
425 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
426 IWL_DEBUG_SCAN(mvm,
427 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
428 scan_notif->last_schedule_line,
429 scan_notif->last_schedule_iteration,
430 __le32_to_cpu(scan_notif->time_after_last_iter));
431
432 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
433 ieee80211_sched_scan_stopped(mvm->hw);
434 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
435 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
436 struct cfg80211_scan_info info = {
437 .aborted = aborted,
438 };
439
440 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
441 aborted ? "aborted" : "completed",
442 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
443
444 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
445 ieee80211_scan_completed(mvm->hw, &info);
446 cancel_delayed_work(&mvm->scan_timeout_dwork);
447 iwl_mvm_resume_tcm(mvm);
448 } else {
449 IWL_ERR(mvm,
450 "got scan complete notification but no scan is running\n");
451 }
452
453 mvm->last_ebs_successful =
454 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
455 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
456 }
457
iwl_ssid_exist(u8 * ssid,u8 ssid_len,struct iwl_ssid_ie * ssid_list)458 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
459 {
460 int i;
461
462 for (i = 0; i < PROBE_OPTION_MAX; i++) {
463 if (!ssid_list[i].len)
464 break;
465 if (ssid_list[i].len == ssid_len &&
466 !memcmp(ssid_list[i].ssid, ssid, ssid_len))
467 return i;
468 }
469 return -1;
470 }
471
472 /* We insert the SSIDs in an inverted order, because the FW will
473 * invert it back.
474 */
iwl_scan_build_ssids(struct iwl_mvm_scan_params * params,struct iwl_ssid_ie * ssids,u32 * ssid_bitmap)475 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
476 struct iwl_ssid_ie *ssids,
477 u32 *ssid_bitmap)
478 {
479 int i, j;
480 int index;
481 u32 tmp_bitmap = 0;
482
483 /*
484 * copy SSIDs from match list.
485 * iwl_config_sched_scan_profiles() uses the order of these ssids to
486 * config match list.
487 */
488 for (i = 0, j = params->n_match_sets - 1;
489 j >= 0 && i < PROBE_OPTION_MAX;
490 i++, j--) {
491 /* skip empty SSID matchsets */
492 if (!params->match_sets[j].ssid.ssid_len)
493 continue;
494 ssids[i].id = WLAN_EID_SSID;
495 ssids[i].len = params->match_sets[j].ssid.ssid_len;
496 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
497 ssids[i].len);
498 }
499
500 /* add SSIDs from scan SSID list */
501 for (j = params->n_ssids - 1;
502 j >= 0 && i < PROBE_OPTION_MAX;
503 i++, j--) {
504 index = iwl_ssid_exist(params->ssids[j].ssid,
505 params->ssids[j].ssid_len,
506 ssids);
507 if (index < 0) {
508 ssids[i].id = WLAN_EID_SSID;
509 ssids[i].len = params->ssids[j].ssid_len;
510 memcpy(ssids[i].ssid, params->ssids[j].ssid,
511 ssids[i].len);
512 tmp_bitmap |= BIT(i);
513 } else {
514 tmp_bitmap |= BIT(index);
515 }
516 }
517 if (ssid_bitmap)
518 *ssid_bitmap = tmp_bitmap;
519 }
520
521 static int
iwl_mvm_config_sched_scan_profiles(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)522 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
523 struct cfg80211_sched_scan_request *req)
524 {
525 struct iwl_scan_offload_profile *profile;
526 struct iwl_scan_offload_profile_cfg_v1 *profile_cfg_v1;
527 struct iwl_scan_offload_blocklist *blocklist;
528 struct iwl_scan_offload_profile_cfg_data *data;
529 int max_profiles = iwl_umac_scan_get_max_profiles(mvm->fw);
530 int profile_cfg_size = sizeof(*data) +
531 sizeof(*profile) * max_profiles;
532 struct iwl_host_cmd cmd = {
533 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
534 .len[1] = profile_cfg_size,
535 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
536 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
537 };
538 int blocklist_len;
539 int i;
540 int ret;
541
542 if (WARN_ON(req->n_match_sets > max_profiles))
543 return -EIO;
544
545 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
546 blocklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
547 else
548 blocklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
549
550 blocklist = kzalloc_objs(*blocklist, blocklist_len);
551 if (!blocklist)
552 return -ENOMEM;
553
554 profile_cfg_v1 = kzalloc(profile_cfg_size, GFP_KERNEL);
555 if (!profile_cfg_v1) {
556 ret = -ENOMEM;
557 goto free_blocklist;
558 }
559
560 cmd.data[0] = blocklist;
561 cmd.len[0] = sizeof(*blocklist) * blocklist_len;
562 cmd.data[1] = profile_cfg_v1;
563
564 /* if max_profile is MAX_PROFILES_V2, we have the new API */
565 if (max_profiles == IWL_SCAN_MAX_PROFILES_V2) {
566 struct iwl_scan_offload_profile_cfg *profile_cfg =
567 (struct iwl_scan_offload_profile_cfg *)profile_cfg_v1;
568
569 data = &profile_cfg->data;
570 } else {
571 data = &profile_cfg_v1->data;
572 }
573
574 /* No blocklist configuration */
575 data->num_profiles = req->n_match_sets;
576 data->active_clients = SCAN_CLIENT_SCHED_SCAN;
577 data->pass_match = SCAN_CLIENT_SCHED_SCAN;
578 data->match_notify = SCAN_CLIENT_SCHED_SCAN;
579
580 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
581 data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
582
583 for (i = 0; i < req->n_match_sets; i++) {
584 profile = &profile_cfg_v1->profiles[i];
585 profile->ssid_index = i;
586 /* Support any cipher and auth algorithm */
587 profile->unicast_cipher = 0xff;
588 profile->auth_alg = IWL_AUTH_ALGO_UNSUPPORTED |
589 IWL_AUTH_ALGO_NONE | IWL_AUTH_ALGO_PSK | IWL_AUTH_ALGO_8021X |
590 IWL_AUTH_ALGO_SAE | IWL_AUTH_ALGO_8021X_SHA384 | IWL_AUTH_ALGO_OWE;
591 profile->network_type = IWL_NETWORK_TYPE_ANY;
592 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
593 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
594 }
595
596 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
597
598 ret = iwl_mvm_send_cmd(mvm, &cmd);
599 kfree(profile_cfg_v1);
600 free_blocklist:
601 kfree(blocklist);
602
603 return ret;
604 }
605
iwl_mvm_scan_pass_all(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)606 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
607 struct cfg80211_sched_scan_request *req)
608 {
609 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
610 IWL_DEBUG_SCAN(mvm,
611 "Sending scheduled scan with filtering, n_match_sets %d\n",
612 req->n_match_sets);
613 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
614 return false;
615 }
616
617 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
618
619 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
620 return true;
621 }
622
iwl_mvm_lmac_scan_abort(struct iwl_mvm * mvm)623 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
624 {
625 int ret;
626 struct iwl_host_cmd cmd = {
627 .id = SCAN_OFFLOAD_ABORT_CMD,
628 };
629 u32 status = CAN_ABORT_STATUS;
630
631 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
632 if (ret)
633 return ret;
634
635 if (status != CAN_ABORT_STATUS) {
636 /*
637 * The scan abort will return 1 for success or
638 * 2 for "failure". A failure condition can be
639 * due to simply not being in an active scan which
640 * can occur if we send the scan abort before the
641 * microcode has notified us that a scan is completed.
642 */
643 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
644 ret = -ENOENT;
645 }
646
647 return ret;
648 }
649
iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm * mvm,struct iwl_scan_req_tx_cmd * tx_cmd,bool no_cck)650 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
651 struct iwl_scan_req_tx_cmd *tx_cmd,
652 bool no_cck)
653 {
654 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
655 TX_CMD_FLG_BT_DIS);
656 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
657 NL80211_BAND_2GHZ,
658 no_cck);
659
660 if (!iwl_mvm_has_new_station_api(mvm->fw)) {
661 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
662 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
663
664 /*
665 * Fw doesn't use this sta anymore, pending deprecation via HOST API
666 * change
667 */
668 } else {
669 tx_cmd[0].sta_id = 0xff;
670 tx_cmd[1].sta_id = 0xff;
671 }
672
673 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
674 TX_CMD_FLG_BT_DIS);
675
676 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
677 NL80211_BAND_5GHZ,
678 no_cck);
679 }
680
681 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)682 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
683 struct ieee80211_channel **channels,
684 int n_channels, u32 ssid_bitmap,
685 struct iwl_scan_req_lmac *cmd)
686 {
687 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
688 int i;
689
690 for (i = 0; i < n_channels; i++) {
691 channel_cfg[i].channel_num =
692 cpu_to_le16(channels[i]->hw_value);
693 channel_cfg[i].iter_count = cpu_to_le16(1);
694 channel_cfg[i].iter_interval = 0;
695 channel_cfg[i].flags =
696 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
697 ssid_bitmap);
698 }
699 }
700
iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm * mvm,const u8 * ies,size_t len,u8 * const pos)701 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
702 size_t len, u8 *const pos)
703 {
704 static const u8 before_ds_params[] = {
705 WLAN_EID_SSID,
706 WLAN_EID_SUPP_RATES,
707 WLAN_EID_REQUEST,
708 WLAN_EID_EXT_SUPP_RATES,
709 };
710 size_t offs;
711 u8 *newpos = pos;
712
713 if (!iwl_mvm_rrm_scan_needed(mvm)) {
714 memcpy(newpos, ies, len);
715 return newpos + len;
716 }
717
718 offs = ieee80211_ie_split(ies, len,
719 before_ds_params,
720 ARRAY_SIZE(before_ds_params),
721 0);
722
723 memcpy(newpos, ies, offs);
724 newpos += offs;
725
726 /* Add a placeholder for DS Parameter Set element */
727 *newpos++ = WLAN_EID_DS_PARAMS;
728 *newpos++ = 1;
729 *newpos++ = 0;
730
731 memcpy(newpos, ies + offs, len - offs);
732 newpos += len - offs;
733
734 return newpos;
735 }
736
iwl_mvm_add_tpc_report_ie(u8 * pos)737 static void iwl_mvm_add_tpc_report_ie(u8 *pos)
738 {
739 pos[0] = WLAN_EID_VENDOR_SPECIFIC;
740 pos[1] = WFA_TPC_IE_LEN - 2;
741 pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
742 pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
743 pos[4] = WLAN_OUI_MICROSOFT & 0xff;
744 pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
745 pos[6] = 0;
746 /* pos[7] - tx power will be inserted by the FW */
747 pos[7] = 0;
748 pos[8] = 0;
749 }
750
751 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)752 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
753 struct ieee80211_scan_ies *ies,
754 struct iwl_mvm_scan_params *params)
755 {
756 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
757 u8 *pos, *newpos;
758 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
759 params->mac_addr : NULL;
760
761 /*
762 * Unfortunately, right now the offload scan doesn't support randomising
763 * within the firmware, so until the firmware API is ready we implement
764 * it in the driver. This means that the scan iterations won't really be
765 * random, only when it's restarted, but at least that helps a bit.
766 */
767 if (mac_addr)
768 get_random_mask_addr(frame->sa, mac_addr,
769 params->mac_addr_mask);
770 else
771 memcpy(frame->sa, vif->addr, ETH_ALEN);
772
773 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
774 eth_broadcast_addr(frame->da);
775 ether_addr_copy(frame->bssid, params->bssid);
776 frame->seq_ctrl = 0;
777
778 pos = frame->u.probe_req.variable;
779 *pos++ = WLAN_EID_SSID;
780 *pos++ = 0;
781
782 params->preq.mac_header.offset = 0;
783 params->preq.mac_header.len = cpu_to_le16(24 + 2);
784
785 /* Insert ds parameter set element on 2.4 GHz band */
786 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
787 ies->ies[NL80211_BAND_2GHZ],
788 ies->len[NL80211_BAND_2GHZ],
789 pos);
790 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
791 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
792 pos = newpos;
793
794 memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
795 ies->len[NL80211_BAND_5GHZ]);
796 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
797 params->preq.band_data[1].len =
798 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
799 pos += ies->len[NL80211_BAND_5GHZ];
800
801 memcpy(pos, ies->ies[NL80211_BAND_6GHZ],
802 ies->len[NL80211_BAND_6GHZ]);
803 params->preq.band_data[2].offset = cpu_to_le16(pos - params->preq.buf);
804 params->preq.band_data[2].len =
805 cpu_to_le16(ies->len[NL80211_BAND_6GHZ]);
806 pos += ies->len[NL80211_BAND_6GHZ];
807 memcpy(pos, ies->common_ies, ies->common_ie_len);
808 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
809
810 if (iwl_mvm_rrm_scan_needed(mvm) &&
811 !fw_has_capa(&mvm->fw->ucode_capa,
812 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
813 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
814 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
815 WFA_TPC_IE_LEN);
816 } else {
817 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
818 }
819 }
820
iwl_mvm_scan_lmac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_lmac * cmd,struct iwl_mvm_scan_params * params)821 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
822 struct iwl_scan_req_lmac *cmd,
823 struct iwl_mvm_scan_params *params)
824 {
825 cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
826 cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
827 cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
828 cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
829 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
830 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
831 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
832 }
833
iwl_mvm_scan_fits(struct iwl_mvm * mvm,int n_ssids,struct ieee80211_scan_ies * ies,int n_channels)834 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
835 struct ieee80211_scan_ies *ies,
836 int n_channels)
837 {
838 return ((n_ssids <= PROBE_OPTION_MAX) &&
839 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &&
840 (ies->common_ie_len +
841 ies->len[NL80211_BAND_2GHZ] + ies->len[NL80211_BAND_5GHZ] +
842 ies->len[NL80211_BAND_6GHZ] <=
843 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
844 }
845
iwl_mvm_scan_use_ebs(struct iwl_mvm * mvm,struct ieee80211_vif * vif)846 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
847 struct ieee80211_vif *vif)
848 {
849 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
850 bool low_latency;
851
852 if (iwl_mvm_is_cdb_supported(mvm))
853 low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ);
854 else
855 low_latency = iwl_mvm_low_latency(mvm);
856
857 /* We can only use EBS if:
858 * 1. the feature is supported;
859 * 2. the last EBS was successful;
860 * 3. if only single scan, the single scan EBS API is supported;
861 * 4. it's not a p2p find operation.
862 * 5. we are not in low latency mode,
863 * or if fragmented ebs is supported by the FW
864 * 6. the VIF is not an AP interface (scan wants survey results)
865 */
866 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
867 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
868 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
869 (!low_latency || iwl_mvm_is_frag_ebs_supported(mvm)) &&
870 ieee80211_vif_type_p2p(vif) != NL80211_IFTYPE_AP);
871 }
872
iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params * params)873 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
874 {
875 return params->n_scan_plans == 1 &&
876 params->scan_plans[0].iterations == 1;
877 }
878
iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)879 static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)
880 {
881 return (type == IWL_SCAN_TYPE_FRAGMENTED ||
882 type == IWL_SCAN_TYPE_FAST_BALANCE);
883 }
884
iwl_mvm_scan_lmac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)885 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
886 struct iwl_mvm_scan_params *params,
887 struct ieee80211_vif *vif)
888 {
889 int flags = 0;
890
891 if (params->n_ssids == 0)
892 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
893
894 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
895 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
896
897 if (iwl_mvm_is_scan_fragmented(params->type))
898 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
899
900 if (iwl_mvm_rrm_scan_needed(mvm) &&
901 fw_has_capa(&mvm->fw->ucode_capa,
902 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
903 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
904
905 if (params->pass_all)
906 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
907 else
908 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
909
910 #ifdef CONFIG_IWLWIFI_DEBUGFS
911 if (mvm->scan_iter_notif_enabled)
912 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
913 #endif
914
915 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
916 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
917
918 if (iwl_mvm_is_regular_scan(params) &&
919 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
920 !iwl_mvm_is_scan_fragmented(params->type))
921 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
922
923 return flags;
924 }
925
926 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)927 iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req,
928 struct iwl_scan_probe_req *src_p_req)
929 {
930 int i;
931
932 p_req->mac_header = src_p_req->mac_header;
933 for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++)
934 p_req->band_data[i] = src_p_req->band_data[i];
935 p_req->common_data = src_p_req->common_data;
936 memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf));
937 }
938
iwl_mvm_scan_lmac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params)939 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
940 struct iwl_mvm_scan_params *params)
941 {
942 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
943 struct iwl_scan_probe_req_v1 *preq =
944 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
945 mvm->fw->ucode_capa.n_scan_channels);
946 u32 ssid_bitmap = 0;
947 int i;
948 u8 band;
949
950 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
951 return -EINVAL;
952
953 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
954
955 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
956 cmd->iter_num = cpu_to_le32(1);
957 cmd->n_channels = (u8)params->n_channels;
958
959 cmd->delay = cpu_to_le32(params->delay);
960
961 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
962 vif));
963
964 band = iwl_mvm_phy_band_from_nl80211(params->channels[0]->band);
965 cmd->flags = cpu_to_le32(band);
966 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
967 MAC_FILTER_IN_BEACON);
968 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
969 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
970
971 /* this API uses bits 1-20 instead of 0-19 */
972 ssid_bitmap <<= 1;
973
974 for (i = 0; i < params->n_scan_plans; i++) {
975 struct cfg80211_sched_scan_plan *scan_plan =
976 ¶ms->scan_plans[i];
977
978 cmd->schedule[i].delay =
979 cpu_to_le16(scan_plan->interval);
980 cmd->schedule[i].iterations = scan_plan->iterations;
981 cmd->schedule[i].full_scan_mul = 1;
982 }
983
984 /*
985 * If the number of iterations of the last scan plan is set to
986 * zero, it should run infinitely. However, this is not always the case.
987 * For example, when regular scan is requested the driver sets one scan
988 * plan with one iteration.
989 */
990 if (!cmd->schedule[i - 1].iterations)
991 cmd->schedule[i - 1].iterations = 0xff;
992
993 if (iwl_mvm_scan_use_ebs(mvm, vif)) {
994 cmd->channel_opt[0].flags =
995 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
996 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
997 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
998 cmd->channel_opt[0].non_ebs_ratio =
999 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
1000 cmd->channel_opt[1].flags =
1001 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1002 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1003 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1004 cmd->channel_opt[1].non_ebs_ratio =
1005 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1006 }
1007
1008 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
1009 params->n_channels, ssid_bitmap, cmd);
1010
1011 iwl_mvm_scan_set_legacy_probe_req(preq, ¶ms->preq);
1012
1013 return 0;
1014 }
1015
rate_to_scan_rate_flag(unsigned int rate)1016 static int rate_to_scan_rate_flag(unsigned int rate)
1017 {
1018 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1019 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
1020 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
1021 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
1022 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
1023 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
1024 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
1025 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
1026 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
1027 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
1028 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
1029 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
1030 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
1031 };
1032
1033 return rate_to_scan_rate[rate];
1034 }
1035
iwl_mvm_scan_config_rates(struct iwl_mvm * mvm)1036 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1037 {
1038 struct ieee80211_supported_band *band;
1039 unsigned int rates = 0;
1040 int i;
1041
1042 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1043 for (i = 0; i < band->n_bitrates; i++)
1044 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1045 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1046 for (i = 0; i < band->n_bitrates; i++)
1047 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1048
1049 /* Set both basic rates and supported rates */
1050 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1051
1052 return cpu_to_le32(rates);
1053 }
1054
iwl_mvm_fill_scan_dwell(struct iwl_mvm * mvm,struct iwl_scan_dwell * dwell)1055 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
1056 struct iwl_scan_dwell *dwell)
1057 {
1058 dwell->active = IWL_SCAN_DWELL_ACTIVE;
1059 dwell->passive = IWL_SCAN_DWELL_PASSIVE;
1060 dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
1061 dwell->extended = IWL_SCAN_DWELL_EXTENDED;
1062 }
1063
iwl_mvm_fill_channels(struct iwl_mvm * mvm,u8 * channels,u32 max_channels)1064 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels,
1065 u32 max_channels)
1066 {
1067 struct ieee80211_supported_band *band;
1068 int i, j = 0;
1069
1070 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1071 for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1072 channels[j] = band->channels[i].hw_value;
1073 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1074 for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1075 channels[j] = band->channels[i].hw_value;
1076 }
1077
iwl_mvm_fill_scan_config_v1(struct iwl_mvm * mvm,void * config,u32 flags,u8 channel_flags,u32 max_channels)1078 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
1079 u32 flags, u8 channel_flags,
1080 u32 max_channels)
1081 {
1082 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL);
1083 struct iwl_scan_config_v1 *cfg = config;
1084
1085 cfg->flags = cpu_to_le32(flags);
1086 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1087 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1088 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1089 cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
1090 cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
1091
1092 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1093
1094 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1095
1096 /* This function should not be called when using ADD_STA ver >=12 */
1097 WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
1098
1099 cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1100 cfg->channel_flags = channel_flags;
1101
1102 iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1103 }
1104
iwl_mvm_fill_scan_config_v2(struct iwl_mvm * mvm,void * config,u32 flags,u8 channel_flags,u32 max_channels)1105 static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config,
1106 u32 flags, u8 channel_flags,
1107 u32 max_channels)
1108 {
1109 struct iwl_scan_config_v2 *cfg = config;
1110
1111 cfg->flags = cpu_to_le32(flags);
1112 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1113 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1114 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1115
1116 if (iwl_mvm_is_cdb_supported(mvm)) {
1117 enum iwl_mvm_scan_type lb_type, hb_type;
1118
1119 lb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1120 NL80211_BAND_2GHZ);
1121 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1122 NL80211_BAND_5GHZ);
1123
1124 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1125 cpu_to_le32(scan_timing[lb_type].max_out_time);
1126 cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1127 cpu_to_le32(scan_timing[lb_type].suspend_time);
1128
1129 cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] =
1130 cpu_to_le32(scan_timing[hb_type].max_out_time);
1131 cfg->suspend_time[SCAN_HB_LMAC_IDX] =
1132 cpu_to_le32(scan_timing[hb_type].suspend_time);
1133 } else {
1134 enum iwl_mvm_scan_type type =
1135 iwl_mvm_get_scan_type(mvm, NULL);
1136
1137 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1138 cpu_to_le32(scan_timing[type].max_out_time);
1139 cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1140 cpu_to_le32(scan_timing[type].suspend_time);
1141 }
1142
1143 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1144
1145 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1146
1147 /* This function should not be called when using ADD_STA ver >=12 */
1148 WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
1149
1150 cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1151 cfg->channel_flags = channel_flags;
1152
1153 iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1154 }
1155
iwl_mvm_legacy_config_scan(struct iwl_mvm * mvm)1156 static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
1157 {
1158 void *cfg;
1159 int ret, cmd_size;
1160 struct iwl_host_cmd cmd = {
1161 .id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1162 };
1163 enum iwl_mvm_scan_type type;
1164 enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET;
1165 int num_channels =
1166 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1167 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1168 u32 flags;
1169 u8 channel_flags;
1170
1171 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1172 num_channels = mvm->fw->ucode_capa.n_scan_channels;
1173
1174 if (iwl_mvm_is_cdb_supported(mvm)) {
1175 type = iwl_mvm_get_scan_type_band(mvm, NULL,
1176 NL80211_BAND_2GHZ);
1177 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1178 NL80211_BAND_5GHZ);
1179 if (type == mvm->scan_type && hb_type == mvm->hb_scan_type)
1180 return 0;
1181 } else {
1182 type = iwl_mvm_get_scan_type(mvm, NULL);
1183 if (type == mvm->scan_type)
1184 return 0;
1185 }
1186
1187 if (iwl_mvm_cdb_scan_api(mvm))
1188 cmd_size = sizeof(struct iwl_scan_config_v2);
1189 else
1190 cmd_size = sizeof(struct iwl_scan_config_v1);
1191 cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1192
1193 cfg = kzalloc(cmd_size, GFP_KERNEL);
1194 if (!cfg)
1195 return -ENOMEM;
1196
1197 flags = SCAN_CONFIG_FLAG_ACTIVATE |
1198 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1199 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1200 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1201 SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1202 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1203 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1204 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1205 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1206 SCAN_CONFIG_N_CHANNELS(num_channels) |
1207 (iwl_mvm_is_scan_fragmented(type) ?
1208 SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1209 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1210
1211 channel_flags = IWL_CHANNEL_FLAG_EBS |
1212 IWL_CHANNEL_FLAG_ACCURATE_EBS |
1213 IWL_CHANNEL_FLAG_EBS_ADD |
1214 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1215
1216 /*
1217 * Check for fragmented scan on LMAC2 - high band.
1218 * LMAC1 - low band is checked above.
1219 */
1220 if (iwl_mvm_cdb_scan_api(mvm)) {
1221 if (iwl_mvm_is_cdb_supported(mvm))
1222 flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ?
1223 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1224 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1225 iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags,
1226 num_channels);
1227 } else {
1228 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags,
1229 num_channels);
1230 }
1231
1232 cmd.data[0] = cfg;
1233 cmd.len[0] = cmd_size;
1234 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1235
1236 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1237
1238 ret = iwl_mvm_send_cmd(mvm, &cmd);
1239 if (!ret) {
1240 mvm->scan_type = type;
1241 mvm->hb_scan_type = hb_type;
1242 }
1243
1244 kfree(cfg);
1245 return ret;
1246 }
1247
iwl_mvm_config_scan(struct iwl_mvm * mvm)1248 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1249 {
1250 struct iwl_scan_config cfg;
1251 struct iwl_host_cmd cmd = {
1252 .id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1253 .len[0] = sizeof(cfg),
1254 .data[0] = &cfg,
1255 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1256 };
1257
1258 if (!iwl_mvm_is_reduced_config_scan_supported(mvm))
1259 return iwl_mvm_legacy_config_scan(mvm);
1260
1261 memset(&cfg, 0, sizeof(cfg));
1262
1263 if (!iwl_mvm_has_new_station_api(mvm->fw)) {
1264 cfg.bcast_sta_id = mvm->aux_sta.sta_id;
1265 } else if (iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_CFG_CMD, 0) < 5) {
1266 /*
1267 * Fw doesn't use this sta anymore. Deprecated on SCAN_CFG_CMD
1268 * version 5.
1269 */
1270 cfg.bcast_sta_id = 0xff;
1271 }
1272
1273 cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1274 cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1275
1276 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1277
1278 return iwl_mvm_send_cmd(mvm, &cmd);
1279 }
1280
iwl_mvm_scan_uid_by_status(struct iwl_mvm * mvm,int status)1281 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1282 {
1283 int i;
1284
1285 for (i = 0; i < mvm->max_scans; i++)
1286 if (mvm->scan_uid_status[i] == status)
1287 return i;
1288
1289 return -ENOENT;
1290 }
1291
iwl_mvm_scan_umac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_umac * cmd,struct iwl_mvm_scan_params * params)1292 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1293 struct iwl_scan_req_umac *cmd,
1294 struct iwl_mvm_scan_params *params)
1295 {
1296 struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1297 u8 active_dwell, passive_dwell;
1298
1299 timing = &scan_timing[params->type];
1300 active_dwell = IWL_SCAN_DWELL_ACTIVE;
1301 passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1302
1303 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1304 cmd->v7.adwell_default_n_aps_social =
1305 IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1306 cmd->v7.adwell_default_n_aps =
1307 IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1308
1309 if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm))
1310 cmd->v9.adwell_default_hb_n_aps =
1311 IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1312
1313 /* if custom max budget was configured with debugfs */
1314 if (IWL_MVM_ADWELL_MAX_BUDGET)
1315 cmd->v7.adwell_max_budget =
1316 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1317 else if (params->n_ssids && params->ssids[0].ssid_len)
1318 cmd->v7.adwell_max_budget =
1319 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1320 else
1321 cmd->v7.adwell_max_budget =
1322 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1323
1324 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1325 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1326 cpu_to_le32(timing->max_out_time);
1327 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1328 cpu_to_le32(timing->suspend_time);
1329
1330 if (iwl_mvm_is_cdb_supported(mvm)) {
1331 hb_timing = &scan_timing[params->hb_type];
1332
1333 cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1334 cpu_to_le32(hb_timing->max_out_time);
1335 cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1336 cpu_to_le32(hb_timing->suspend_time);
1337 }
1338
1339 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1340 cmd->v7.active_dwell = active_dwell;
1341 cmd->v7.passive_dwell = passive_dwell;
1342 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1343 } else {
1344 cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1345 cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1346 if (iwl_mvm_is_cdb_supported(mvm)) {
1347 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
1348 active_dwell;
1349 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
1350 passive_dwell;
1351 }
1352 }
1353 } else {
1354 cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED;
1355 cmd->v1.active_dwell = active_dwell;
1356 cmd->v1.passive_dwell = passive_dwell;
1357 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1358
1359 if (iwl_mvm_is_cdb_supported(mvm)) {
1360 hb_timing = &scan_timing[params->hb_type];
1361
1362 cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1363 cpu_to_le32(hb_timing->max_out_time);
1364 cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1365 cpu_to_le32(hb_timing->suspend_time);
1366 }
1367
1368 if (iwl_mvm_cdb_scan_api(mvm)) {
1369 cmd->v6.scan_priority =
1370 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1371 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1372 cpu_to_le32(timing->max_out_time);
1373 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1374 cpu_to_le32(timing->suspend_time);
1375 } else {
1376 cmd->v1.scan_priority =
1377 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1378 cmd->v1.max_out_time =
1379 cpu_to_le32(timing->max_out_time);
1380 cmd->v1.suspend_time =
1381 cpu_to_le32(timing->suspend_time);
1382 }
1383 }
1384
1385 if (iwl_mvm_is_regular_scan(params))
1386 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1387 else
1388 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1389 }
1390
iwl_mvm_scan_umac_ooc_priority(int type)1391 static u32 iwl_mvm_scan_umac_ooc_priority(int type)
1392 {
1393 if (type == IWL_MVM_SCAN_REGULAR)
1394 return IWL_SCAN_PRIORITY_EXT_6;
1395
1396 return IWL_SCAN_PRIORITY_EXT_2;
1397 }
1398
1399 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)1400 iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm *mvm,
1401 struct iwl_scan_general_params_v11 *general_params,
1402 struct iwl_mvm_scan_params *params)
1403 {
1404 struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1405 u8 active_dwell, passive_dwell;
1406
1407 timing = &scan_timing[params->type];
1408 active_dwell = IWL_SCAN_DWELL_ACTIVE;
1409 passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1410
1411 general_params->adwell_default_social_chn =
1412 IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1413 general_params->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1414 general_params->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1415
1416 /* if custom max budget was configured with debugfs */
1417 if (IWL_MVM_ADWELL_MAX_BUDGET)
1418 general_params->adwell_max_budget =
1419 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1420 else if (params->n_ssids && params->ssids[0].ssid_len)
1421 general_params->adwell_max_budget =
1422 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1423 else
1424 general_params->adwell_max_budget =
1425 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1426
1427 general_params->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1428 general_params->max_out_of_time[SCAN_LB_LMAC_IDX] =
1429 cpu_to_le32(timing->max_out_time);
1430 general_params->suspend_time[SCAN_LB_LMAC_IDX] =
1431 cpu_to_le32(timing->suspend_time);
1432
1433 hb_timing = &scan_timing[params->hb_type];
1434
1435 general_params->max_out_of_time[SCAN_HB_LMAC_IDX] =
1436 cpu_to_le32(hb_timing->max_out_time);
1437 general_params->suspend_time[SCAN_HB_LMAC_IDX] =
1438 cpu_to_le32(hb_timing->suspend_time);
1439
1440 general_params->active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1441 general_params->passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1442 general_params->active_dwell[SCAN_HB_LMAC_IDX] = active_dwell;
1443 general_params->passive_dwell[SCAN_HB_LMAC_IDX] = passive_dwell;
1444 }
1445
1446 struct iwl_mvm_scan_channel_segment {
1447 u8 start_idx;
1448 u8 end_idx;
1449 u8 first_channel_id;
1450 u8 last_channel_id;
1451 u8 channel_spacing_shift;
1452 u8 band;
1453 };
1454
1455 static const struct iwl_mvm_scan_channel_segment scan_channel_segments[] = {
1456 {
1457 .start_idx = 0,
1458 .end_idx = 13,
1459 .first_channel_id = 1,
1460 .last_channel_id = 14,
1461 .channel_spacing_shift = 0,
1462 .band = PHY_BAND_24
1463 },
1464 {
1465 .start_idx = 14,
1466 .end_idx = 41,
1467 .first_channel_id = 36,
1468 .last_channel_id = 144,
1469 .channel_spacing_shift = 2,
1470 .band = PHY_BAND_5
1471 },
1472 {
1473 .start_idx = 42,
1474 .end_idx = 50,
1475 .first_channel_id = 149,
1476 .last_channel_id = 181,
1477 .channel_spacing_shift = 2,
1478 .band = PHY_BAND_5
1479 },
1480 {
1481 .start_idx = 51,
1482 .end_idx = 111,
1483 .first_channel_id = 1,
1484 .last_channel_id = 241,
1485 .channel_spacing_shift = 2,
1486 .band = PHY_BAND_6
1487 },
1488 };
1489
iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id,u8 band)1490 static int iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id, u8 band)
1491 {
1492 int i, index;
1493
1494 if (!channel_id)
1495 return -EINVAL;
1496
1497 for (i = 0; i < ARRAY_SIZE(scan_channel_segments); i++) {
1498 const struct iwl_mvm_scan_channel_segment *ch_segment =
1499 &scan_channel_segments[i];
1500 u32 ch_offset;
1501
1502 if (ch_segment->band != band ||
1503 ch_segment->first_channel_id > channel_id ||
1504 ch_segment->last_channel_id < channel_id)
1505 continue;
1506
1507 ch_offset = (channel_id - ch_segment->first_channel_id) >>
1508 ch_segment->channel_spacing_shift;
1509
1510 index = scan_channel_segments[i].start_idx + ch_offset;
1511 if (index < IWL_SCAN_NUM_CHANNELS)
1512 return index;
1513
1514 break;
1515 }
1516
1517 return -EINVAL;
1518 }
1519
1520 static const u8 p2p_go_friendly_chs[] = {
1521 36, 40, 44, 48, 149, 153, 157, 161, 165,
1522 };
1523
1524 static const u8 social_chs[] = {
1525 1, 6, 11
1526 };
1527
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)1528 static void iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type,
1529 u8 ch_id, u8 band, u8 *ch_bitmap,
1530 size_t bitmap_n_entries)
1531 {
1532 int i;
1533
1534 if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1535 return;
1536
1537 for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1538 if (p2p_go_friendly_chs[i] == ch_id) {
1539 int ch_idx, bitmap_idx;
1540
1541 ch_idx = iwl_mvm_scan_ch_and_band_to_idx(ch_id, band);
1542 if (ch_idx < 0)
1543 return;
1544
1545 bitmap_idx = ch_idx / 8;
1546 if (bitmap_idx >= bitmap_n_entries)
1547 return;
1548
1549 ch_idx = ch_idx % 8;
1550 ch_bitmap[bitmap_idx] |= BIT(ch_idx);
1551
1552 return;
1553 }
1554 }
1555 }
1556
iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type,u8 ch_id)1557 static u32 iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id)
1558 {
1559 int i;
1560 u32 flags = 0;
1561
1562 if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1563 goto out;
1564
1565 for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1566 if (p2p_go_friendly_chs[i] == ch_id) {
1567 flags |= IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
1568 break;
1569 }
1570 }
1571
1572 if (flags)
1573 goto out;
1574
1575 for (i = 0; i < ARRAY_SIZE(social_chs); i++) {
1576 if (social_chs[i] == ch_id) {
1577 flags |= IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT;
1578 break;
1579 }
1580 }
1581
1582 out:
1583 return flags;
1584 }
1585
1586 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)1587 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1588 struct ieee80211_channel **channels,
1589 int n_channels, u32 flags,
1590 struct iwl_scan_channel_cfg_umac *channel_cfg)
1591 {
1592 int i;
1593
1594 for (i = 0; i < n_channels; i++) {
1595 channel_cfg[i].flags = cpu_to_le32(flags);
1596 channel_cfg[i].channel_num = channels[i]->hw_value;
1597 if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
1598 enum nl80211_band band = channels[i]->band;
1599
1600 channel_cfg[i].v2.band =
1601 iwl_mvm_phy_band_from_nl80211(band);
1602 channel_cfg[i].v2.iter_count = 1;
1603 channel_cfg[i].v2.iter_interval = 0;
1604 } else {
1605 channel_cfg[i].v1.iter_count = 1;
1606 channel_cfg[i].v1.iter_interval = 0;
1607 }
1608 }
1609 }
1610
1611 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)1612 iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm *mvm,
1613 struct ieee80211_channel **channels,
1614 struct iwl_scan_channel_params_v4 *cp,
1615 int n_channels, u32 flags,
1616 enum nl80211_iftype vif_type)
1617 {
1618 u8 *bitmap = cp->adwell_ch_override_bitmap;
1619 size_t bitmap_n_entries = ARRAY_SIZE(cp->adwell_ch_override_bitmap);
1620 int i;
1621
1622 for (i = 0; i < n_channels; i++) {
1623 enum nl80211_band band = channels[i]->band;
1624 struct iwl_scan_channel_cfg_umac *cfg =
1625 &cp->channel_config[i];
1626
1627 cfg->flags = cpu_to_le32(flags);
1628 cfg->channel_num = channels[i]->hw_value;
1629 cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
1630 cfg->v2.iter_count = 1;
1631 cfg->v2.iter_interval = 0;
1632
1633 iwl_mvm_scan_ch_add_n_aps_override(vif_type,
1634 cfg->channel_num,
1635 cfg->v2.band, bitmap,
1636 bitmap_n_entries);
1637 }
1638 }
1639
1640 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)1641 iwl_mvm_umac_scan_cfg_channels_v7(struct iwl_mvm *mvm,
1642 struct ieee80211_channel **channels,
1643 struct iwl_scan_channel_params_v7 *cp,
1644 int n_channels, u32 flags,
1645 enum nl80211_iftype vif_type, u32 version)
1646 {
1647 int i;
1648
1649 for (i = 0; i < n_channels; i++) {
1650 enum nl80211_band band = channels[i]->band;
1651 struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i];
1652 u32 n_aps_flag =
1653 iwl_mvm_scan_ch_n_aps_flag(vif_type,
1654 channels[i]->hw_value);
1655 u8 iwl_band = iwl_mvm_phy_band_from_nl80211(band);
1656
1657 cfg->flags = cpu_to_le32(flags | n_aps_flag);
1658 cfg->channel_num = channels[i]->hw_value;
1659 if (cfg80211_channel_is_psc(channels[i]))
1660 cfg->flags = 0;
1661
1662 if (band == NL80211_BAND_6GHZ) {
1663 /* 6 GHz channels should only appear in a scan request
1664 * that has scan_6ghz set. The only exception is MLO
1665 * scan, which has to be passive.
1666 */
1667 WARN_ON_ONCE(cfg->flags != 0);
1668 cfg->flags =
1669 cpu_to_le32(IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE);
1670 }
1671
1672 cfg->v2.iter_count = 1;
1673 cfg->v2.iter_interval = 0;
1674 if (version < 17)
1675 cfg->v2.band = iwl_band;
1676 else
1677 cfg->flags |= cpu_to_le32((iwl_band <<
1678 IWL_CHAN_CFG_FLAGS_BAND_POS));
1679 }
1680 }
1681
1682 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)1683 iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm *mvm,
1684 struct iwl_mvm_scan_params *params,
1685 struct iwl_scan_probe_params_v4 *pp)
1686 {
1687 int j, idex_s = 0, idex_b = 0;
1688 struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1689 params->scan_6ghz_params;
1690 bool hidden_supported = fw_has_capa(&mvm->fw->ucode_capa,
1691 IWL_UCODE_TLV_CAPA_HIDDEN_6GHZ_SCAN);
1692
1693 for (j = 0; j < params->n_ssids && idex_s < SCAN_SHORT_SSID_MAX_SIZE;
1694 j++) {
1695 if (!params->ssids[j].ssid_len)
1696 continue;
1697
1698 pp->short_ssid[idex_s] =
1699 cpu_to_le32(~crc32_le(~0, params->ssids[j].ssid,
1700 params->ssids[j].ssid_len));
1701
1702 if (hidden_supported) {
1703 pp->direct_scan[idex_s].id = WLAN_EID_SSID;
1704 pp->direct_scan[idex_s].len = params->ssids[j].ssid_len;
1705 memcpy(pp->direct_scan[idex_s].ssid, params->ssids[j].ssid,
1706 params->ssids[j].ssid_len);
1707 }
1708 idex_s++;
1709 }
1710
1711 /*
1712 * Populate the arrays of the short SSIDs and the BSSIDs using the 6GHz
1713 * collocated parameters. This might not be optimal, as this processing
1714 * does not (yet) correspond to the actual channels, so it is possible
1715 * that some entries would be left out.
1716 *
1717 * TODO: improve this logic.
1718 */
1719 for (j = 0; j < params->n_6ghz_params; j++) {
1720 int k;
1721
1722 /* First, try to place the short SSID */
1723 if (scan_6ghz_params[j].short_ssid_valid) {
1724 for (k = 0; k < idex_s; k++) {
1725 if (pp->short_ssid[k] ==
1726 cpu_to_le32(scan_6ghz_params[j].short_ssid))
1727 break;
1728 }
1729
1730 if (k == idex_s && idex_s < SCAN_SHORT_SSID_MAX_SIZE) {
1731 pp->short_ssid[idex_s++] =
1732 cpu_to_le32(scan_6ghz_params[j].short_ssid);
1733 }
1734 }
1735
1736 /* try to place BSSID for the same entry */
1737 for (k = 0; k < idex_b; k++) {
1738 if (!memcmp(&pp->bssid_array[k],
1739 scan_6ghz_params[j].bssid, ETH_ALEN))
1740 break;
1741 }
1742
1743 if (k == idex_b && idex_b < SCAN_BSSID_MAX_SIZE &&
1744 !WARN_ONCE(!is_valid_ether_addr(scan_6ghz_params[j].bssid),
1745 "scan: invalid BSSID at index %u, index_b=%u\n",
1746 j, idex_b)) {
1747 memcpy(&pp->bssid_array[idex_b++],
1748 scan_6ghz_params[j].bssid, ETH_ALEN);
1749 }
1750 }
1751
1752 pp->short_ssid_num = idex_s;
1753 pp->bssid_num = idex_b;
1754 }
1755
1756 /* TODO: this function can be merged with iwl_mvm_scan_umac_fill_ch_p_v7 */
1757 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)1758 iwl_mvm_umac_scan_cfg_channels_v7_6g(struct iwl_mvm *mvm,
1759 struct iwl_mvm_scan_params *params,
1760 u32 n_channels,
1761 struct iwl_scan_probe_params_v4 *pp,
1762 struct iwl_scan_channel_params_v7 *cp,
1763 enum nl80211_iftype vif_type,
1764 u32 version)
1765 {
1766 int i;
1767 struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1768 params->scan_6ghz_params;
1769 u32 ch_cnt;
1770
1771 for (i = 0, ch_cnt = 0; i < params->n_channels; i++) {
1772 struct iwl_scan_channel_cfg_umac *cfg =
1773 &cp->channel_config[ch_cnt];
1774
1775 u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0;
1776 u8 k, n_s_ssids = 0, n_bssids = 0;
1777 u8 max_s_ssids, max_bssids;
1778 bool force_passive = false, found = false, allow_passive = true,
1779 unsolicited_probe_on_chan = false, psc_no_listen = false;
1780 s8 psd_20 = IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
1781
1782 /*
1783 * Avoid performing passive scan on non PSC channels unless the
1784 * scan is specifically a passive scan, i.e., no SSIDs
1785 * configured in the scan command.
1786 */
1787 if (!cfg80211_channel_is_psc(params->channels[i]) &&
1788 !params->n_6ghz_params && params->n_ssids)
1789 continue;
1790
1791 cfg->channel_num = params->channels[i]->hw_value;
1792 if (version < 17)
1793 cfg->v2.band = PHY_BAND_6;
1794 else
1795 cfg->flags |= cpu_to_le32(PHY_BAND_6 <<
1796 IWL_CHAN_CFG_FLAGS_BAND_POS);
1797
1798 cfg->v5.iter_count = 1;
1799 cfg->v5.iter_interval = 0;
1800
1801 for (u32 j = 0; j < params->n_6ghz_params; j++) {
1802 s8 tmp_psd_20;
1803
1804 if (!(scan_6ghz_params[j].channel_idx == i))
1805 continue;
1806
1807 unsolicited_probe_on_chan |=
1808 scan_6ghz_params[j].unsolicited_probe;
1809
1810 /* Use the highest PSD value allowed as advertised by
1811 * APs for this channel
1812 */
1813 tmp_psd_20 = scan_6ghz_params[j].psd_20;
1814 if (tmp_psd_20 !=
1815 IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED &&
1816 (psd_20 ==
1817 IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED ||
1818 psd_20 < tmp_psd_20))
1819 psd_20 = tmp_psd_20;
1820
1821 psc_no_listen |= scan_6ghz_params[j].psc_no_listen;
1822 }
1823
1824 /*
1825 * In the following cases apply passive scan:
1826 * 1. Non fragmented scan:
1827 * - PSC channel with NO_LISTEN_FLAG on should be treated
1828 * like non PSC channel
1829 * - Non PSC channel with more than 3 short SSIDs or more
1830 * than 9 BSSIDs.
1831 * - Non PSC Channel with unsolicited probe response and
1832 * more than 2 short SSIDs or more than 6 BSSIDs.
1833 * - PSC channel with more than 2 short SSIDs or more than
1834 * 6 BSSIDs.
1835 * 3. Fragmented scan:
1836 * - PSC channel with more than 1 SSID or 3 BSSIDs.
1837 * - Non PSC channel with more than 2 SSIDs or 6 BSSIDs.
1838 * - Non PSC channel with unsolicited probe response and
1839 * more than 1 SSID or more than 3 BSSIDs.
1840 */
1841 if (!iwl_mvm_is_scan_fragmented(params->type)) {
1842 if (!cfg80211_channel_is_psc(params->channels[i]) ||
1843 psc_no_listen) {
1844 if (unsolicited_probe_on_chan) {
1845 max_s_ssids = 2;
1846 max_bssids = 6;
1847 } else {
1848 max_s_ssids = 3;
1849 max_bssids = 9;
1850 }
1851 } else {
1852 max_s_ssids = 2;
1853 max_bssids = 6;
1854 }
1855 } else if (cfg80211_channel_is_psc(params->channels[i])) {
1856 max_s_ssids = 1;
1857 max_bssids = 3;
1858 } else {
1859 if (unsolicited_probe_on_chan) {
1860 max_s_ssids = 1;
1861 max_bssids = 3;
1862 } else {
1863 max_s_ssids = 2;
1864 max_bssids = 6;
1865 }
1866 }
1867
1868 /*
1869 * The optimize the scan time, i.e., reduce the scan dwell time
1870 * on each channel, the below logic tries to set 3 direct BSSID
1871 * probe requests for each broadcast probe request with a short
1872 * SSID.
1873 * TODO: improve this logic
1874 */
1875 for (u32 j = 0; j < params->n_6ghz_params; j++) {
1876 if (!(scan_6ghz_params[j].channel_idx == i))
1877 continue;
1878
1879 found = false;
1880
1881 for (k = 0;
1882 k < pp->short_ssid_num && n_s_ssids < max_s_ssids;
1883 k++) {
1884 if (!scan_6ghz_params[j].unsolicited_probe &&
1885 le32_to_cpu(pp->short_ssid[k]) ==
1886 scan_6ghz_params[j].short_ssid) {
1887 /* Relevant short SSID bit set */
1888 if (s_ssid_bitmap & BIT(k)) {
1889 found = true;
1890 break;
1891 }
1892
1893 /*
1894 * Prefer creating BSSID entries unless
1895 * the short SSID probe can be done in
1896 * the same channel dwell iteration.
1897 *
1898 * We also need to create a short SSID
1899 * entry for any hidden AP.
1900 */
1901 if (3 * n_s_ssids > n_bssids &&
1902 !pp->direct_scan[k].len)
1903 break;
1904
1905 /* Hidden AP, cannot do passive scan */
1906 if (pp->direct_scan[k].len)
1907 allow_passive = false;
1908
1909 s_ssid_bitmap |= BIT(k);
1910 n_s_ssids++;
1911 found = true;
1912 break;
1913 }
1914 }
1915
1916 if (found)
1917 continue;
1918
1919 for (k = 0; k < pp->bssid_num; k++) {
1920 if (!memcmp(&pp->bssid_array[k],
1921 scan_6ghz_params[j].bssid,
1922 ETH_ALEN)) {
1923 if (!(bssid_bitmap & BIT(k))) {
1924 if (n_bssids < max_bssids) {
1925 bssid_bitmap |= BIT(k);
1926 n_bssids++;
1927 } else {
1928 force_passive = TRUE;
1929 }
1930 }
1931 break;
1932 }
1933 }
1934 }
1935
1936 if (cfg80211_channel_is_psc(params->channels[i]) &&
1937 psc_no_listen)
1938 flags |= IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN;
1939
1940 if (unsolicited_probe_on_chan)
1941 flags |= IWL_UHB_CHAN_CFG_FLAG_UNSOLICITED_PROBE_RES;
1942
1943 if ((allow_passive && force_passive) ||
1944 (!(bssid_bitmap | s_ssid_bitmap) &&
1945 !cfg80211_channel_is_psc(params->channels[i])))
1946 flags |= IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE;
1947 else
1948 flags |= bssid_bitmap | (s_ssid_bitmap << 16);
1949
1950 cfg->flags |= cpu_to_le32(flags);
1951 if (version >= 17)
1952 cfg->v5.psd_20 = psd_20;
1953
1954 ch_cnt++;
1955 }
1956
1957 if (params->n_channels > ch_cnt)
1958 IWL_DEBUG_SCAN(mvm,
1959 "6GHz: reducing number channels: (%u->%u)\n",
1960 params->n_channels, ch_cnt);
1961
1962 return ch_cnt;
1963 }
1964
iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)1965 static u8 iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm *mvm,
1966 struct iwl_mvm_scan_params *params,
1967 struct ieee80211_vif *vif)
1968 {
1969 u8 flags = 0;
1970
1971 flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER;
1972
1973 if (iwl_mvm_scan_use_ebs(mvm, vif))
1974 flags |= IWL_SCAN_CHANNEL_FLAG_EBS |
1975 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1976 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1977
1978 /* set fragmented ebs for fragmented scan on HB channels */
1979 if ((!iwl_mvm_is_cdb_supported(mvm) &&
1980 iwl_mvm_is_scan_fragmented(params->type)) ||
1981 (iwl_mvm_is_cdb_supported(mvm) &&
1982 iwl_mvm_is_scan_fragmented(params->hb_type)))
1983 flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
1984
1985 /*
1986 * force EBS in case the scan is a fragmented and there is a need to take P2P
1987 * GO operation into consideration during scan operation.
1988 */
1989 if ((!iwl_mvm_is_cdb_supported(mvm) &&
1990 iwl_mvm_is_scan_fragmented(params->type) && params->respect_p2p_go) ||
1991 (iwl_mvm_is_cdb_supported(mvm) &&
1992 iwl_mvm_is_scan_fragmented(params->hb_type) &&
1993 params->respect_p2p_go_hb)) {
1994 IWL_DEBUG_SCAN(mvm, "Respect P2P GO. Force EBS\n");
1995 flags |= IWL_SCAN_CHANNEL_FLAG_FORCE_EBS;
1996 }
1997
1998 return flags;
1999 }
2000
iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2001 static void iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm *mvm,
2002 struct iwl_mvm_scan_params *params,
2003 struct ieee80211_vif *vif)
2004 {
2005 struct ieee80211_supported_band *sband =
2006 &mvm->nvm_data->bands[NL80211_BAND_6GHZ];
2007 u32 n_disabled, i;
2008
2009 params->enable_6ghz_passive = false;
2010
2011 if (params->scan_6ghz)
2012 return;
2013
2014 if (!fw_has_capa(&mvm->fw->ucode_capa,
2015 IWL_UCODE_TLV_CAPA_PASSIVE_6GHZ_SCAN)) {
2016 IWL_DEBUG_SCAN(mvm,
2017 "6GHz passive scan: Not supported by FW\n");
2018 return;
2019 }
2020
2021 /* 6GHz passive scan allowed only on station interface */
2022 if (vif->type != NL80211_IFTYPE_STATION) {
2023 IWL_DEBUG_SCAN(mvm,
2024 "6GHz passive scan: not station interface\n");
2025 return;
2026 }
2027
2028 /*
2029 * 6GHz passive scan is allowed in a defined time interval following HW
2030 * reset or resume flow, or while not associated and a large interval
2031 * has passed since the last 6GHz passive scan.
2032 */
2033 if ((vif->cfg.assoc ||
2034 time_after(mvm->last_6ghz_passive_scan_jiffies +
2035 (IWL_MVM_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) &&
2036 (time_before(mvm->last_reset_or_resume_time_jiffies +
2037 (IWL_MVM_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ),
2038 jiffies))) {
2039 IWL_DEBUG_SCAN(mvm, "6GHz passive scan: %s\n",
2040 vif->cfg.assoc ? "associated" :
2041 "timeout did not expire");
2042 return;
2043 }
2044
2045 /* not enough channels in the regular scan request */
2046 if (params->n_channels < IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS) {
2047 IWL_DEBUG_SCAN(mvm,
2048 "6GHz passive scan: not enough channels\n");
2049 return;
2050 }
2051
2052 for (i = 0; i < params->n_ssids; i++) {
2053 if (!params->ssids[i].ssid_len)
2054 break;
2055 }
2056
2057 /* not a wildcard scan, so cannot enable passive 6GHz scan */
2058 if (i == params->n_ssids) {
2059 IWL_DEBUG_SCAN(mvm,
2060 "6GHz passive scan: no wildcard SSID\n");
2061 return;
2062 }
2063
2064 if (!sband || !sband->n_channels) {
2065 IWL_DEBUG_SCAN(mvm,
2066 "6GHz passive scan: no 6GHz channels\n");
2067 return;
2068 }
2069
2070 for (i = 0, n_disabled = 0; i < sband->n_channels; i++) {
2071 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED))
2072 n_disabled++;
2073 }
2074
2075 /*
2076 * Not all the 6GHz channels are disabled, so no need for 6GHz passive
2077 * scan
2078 */
2079 if (n_disabled != sband->n_channels) {
2080 IWL_DEBUG_SCAN(mvm,
2081 "6GHz passive scan: 6GHz channels enabled\n");
2082 return;
2083 }
2084
2085 /* all conditions to enable 6ghz passive scan are satisfied */
2086 IWL_DEBUG_SCAN(mvm, "6GHz passive scan: can be enabled\n");
2087 params->enable_6ghz_passive = true;
2088 }
2089
iwl_mvm_scan_umac_flags_v2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,int type)2090 static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm,
2091 struct iwl_mvm_scan_params *params,
2092 struct ieee80211_vif *vif,
2093 int type)
2094 {
2095 u16 flags = 0;
2096
2097 /*
2098 * If no direct SSIDs are provided perform a passive scan. Otherwise,
2099 * if there is a single SSID which is not the broadcast SSID, assume
2100 * that the scan is intended for roaming purposes and thus enable Rx on
2101 * all chains to improve chances of hearing the beacons/probe responses.
2102 */
2103 if (params->n_ssids == 0)
2104 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE;
2105 else if (params->n_ssids == 1 && params->ssids[0].ssid_len)
2106 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_USE_ALL_RX_CHAINS;
2107
2108 if (iwl_mvm_is_scan_fragmented(params->type))
2109 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
2110
2111 if (iwl_mvm_is_scan_fragmented(params->hb_type))
2112 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2;
2113
2114 if (params->pass_all)
2115 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL;
2116 else
2117 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH;
2118
2119 if (!iwl_mvm_is_regular_scan(params))
2120 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC;
2121
2122 if (params->iter_notif ||
2123 mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2124 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE;
2125
2126 if (IWL_MVM_ADWELL_ENABLE)
2127 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL;
2128
2129 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2130 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE;
2131
2132 if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2133 params->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ)
2134 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_TRIGGER_UHB_SCAN;
2135
2136 if (params->enable_6ghz_passive)
2137 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_6GHZ_PASSIVE_SCAN;
2138
2139 if (iwl_mvm_is_oce_supported(mvm) &&
2140 (params->flags & (NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP |
2141 NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE |
2142 NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)))
2143 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_OCE;
2144
2145 return flags;
2146 }
2147
iwl_mvm_scan_umac_flags2(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif,int type,u16 gen_flags)2148 static u8 iwl_mvm_scan_umac_flags2(struct iwl_mvm *mvm,
2149 struct iwl_mvm_scan_params *params,
2150 struct ieee80211_vif *vif, int type,
2151 u16 gen_flags)
2152 {
2153 u8 flags = 0;
2154
2155 if (iwl_mvm_is_cdb_supported(mvm)) {
2156 if (params->respect_p2p_go)
2157 flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB;
2158 if (params->respect_p2p_go_hb)
2159 flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2160 } else {
2161 if (params->respect_p2p_go)
2162 flags = IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB |
2163 IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2164 }
2165
2166 if (params->scan_6ghz &&
2167 fw_has_capa(&mvm->fw->ucode_capa,
2168 IWL_UCODE_TLV_CAPA_SCAN_DONT_TOGGLE_ANT))
2169 flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_DONT_TOGGLE_ANT;
2170
2171 /* Passive and AP interface -> ACS (automatic channel selection) */
2172 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE &&
2173 ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_AP &&
2174 iwl_fw_lookup_notif_ver(mvm->fw, SCAN_GROUP, CHANNEL_SURVEY_NOTIF,
2175 0) >= 1)
2176 flags |= IWL_UMAC_SCAN_GEN_FLAGS2_COLLECT_CHANNEL_STATS;
2177
2178 return flags;
2179 }
2180
iwl_mvm_scan_umac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2181 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
2182 struct iwl_mvm_scan_params *params,
2183 struct ieee80211_vif *vif)
2184 {
2185 u16 flags = 0;
2186
2187 if (params->n_ssids == 0)
2188 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
2189
2190 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
2191 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
2192
2193 if (iwl_mvm_is_scan_fragmented(params->type))
2194 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
2195
2196 if (iwl_mvm_is_cdb_supported(mvm) &&
2197 iwl_mvm_is_scan_fragmented(params->hb_type))
2198 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
2199
2200 if (iwl_mvm_rrm_scan_needed(mvm) &&
2201 fw_has_capa(&mvm->fw->ucode_capa,
2202 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
2203 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
2204
2205 if (params->pass_all)
2206 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
2207 else
2208 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
2209
2210 if (!iwl_mvm_is_regular_scan(params))
2211 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
2212
2213 if (params->iter_notif)
2214 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2215
2216 #ifdef CONFIG_IWLWIFI_DEBUGFS
2217 if (mvm->scan_iter_notif_enabled)
2218 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2219 #endif
2220
2221 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2222 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2223
2224 if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE)
2225 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
2226
2227 /*
2228 * Extended dwell is relevant only for low band to start with, as it is
2229 * being used for social channles only (1, 6, 11), so we can check
2230 * only scan type on low band also for CDB.
2231 */
2232 if (iwl_mvm_is_regular_scan(params) &&
2233 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
2234 !iwl_mvm_is_scan_fragmented(params->type) &&
2235 !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
2236 !iwl_mvm_is_oce_supported(mvm))
2237 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
2238
2239 if (iwl_mvm_is_oce_supported(mvm)) {
2240 if ((params->flags &
2241 NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
2242 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
2243 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
2244 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
2245 * the same bit, we need to make sure that we use this bit here
2246 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
2247 * used. */
2248 if ((params->flags &
2249 NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
2250 !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
2251 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
2252 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
2253 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
2254 }
2255
2256 return flags;
2257 }
2258
2259 static int
iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params * params,struct iwl_scan_umac_schedule * schedule,__le16 * delay)2260 iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params *params,
2261 struct iwl_scan_umac_schedule *schedule,
2262 __le16 *delay)
2263 {
2264 int i;
2265 if (WARN_ON(!params->n_scan_plans ||
2266 params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
2267 return -EINVAL;
2268
2269 for (i = 0; i < params->n_scan_plans; i++) {
2270 struct cfg80211_sched_scan_plan *scan_plan =
2271 ¶ms->scan_plans[i];
2272
2273 schedule[i].iter_count = scan_plan->iterations;
2274 schedule[i].interval =
2275 cpu_to_le16(scan_plan->interval);
2276 }
2277
2278 /*
2279 * If the number of iterations of the last scan plan is set to
2280 * zero, it should run infinitely. However, this is not always the case.
2281 * For example, when regular scan is requested the driver sets one scan
2282 * plan with one iteration.
2283 */
2284 if (!schedule[params->n_scan_plans - 1].iter_count)
2285 schedule[params->n_scan_plans - 1].iter_count = 0xff;
2286
2287 *delay = cpu_to_le16(params->delay);
2288
2289 return 0;
2290 }
2291
iwl_mvm_scan_umac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2292 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2293 struct iwl_mvm_scan_params *params,
2294 int type, int uid)
2295 {
2296 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
2297 struct iwl_scan_umac_chan_param *chan_param;
2298 void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
2299 void *sec_part = (u8 *)cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) *
2300 mvm->fw->ucode_capa.n_scan_channels;
2301 struct iwl_scan_req_umac_tail_v2 *tail_v2 =
2302 (struct iwl_scan_req_umac_tail_v2 *)sec_part;
2303 struct iwl_scan_req_umac_tail_v1 *tail_v1;
2304 struct iwl_ssid_ie *direct_scan;
2305 int ret = 0;
2306 u32 ssid_bitmap = 0;
2307 u8 channel_flags = 0;
2308 u16 gen_flags;
2309 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2310
2311 chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
2312
2313 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
2314
2315 cmd->uid = cpu_to_le32(uid);
2316 gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
2317 cmd->general_flags = cpu_to_le16(gen_flags);
2318 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
2319 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
2320 cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
2321 IWL_SCAN_NUM_OF_FRAGS;
2322 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
2323 cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
2324 IWL_SCAN_NUM_OF_FRAGS;
2325
2326 cmd->v8.general_flags2 =
2327 IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER;
2328 }
2329
2330 cmd->scan_start_mac_id = scan_vif->id;
2331
2332 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2333 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
2334
2335 if (iwl_mvm_scan_use_ebs(mvm, vif)) {
2336 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
2337 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
2338 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
2339
2340 /* set fragmented ebs for fragmented scan on HB channels */
2341 if (iwl_mvm_is_frag_ebs_supported(mvm)) {
2342 if (gen_flags &
2343 IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED ||
2344 (!iwl_mvm_is_cdb_supported(mvm) &&
2345 gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED))
2346 channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
2347 }
2348 }
2349
2350 chan_param->flags = channel_flags;
2351 chan_param->count = params->n_channels;
2352
2353 ret = iwl_mvm_fill_scan_sched_params(params, tail_v2->schedule,
2354 &tail_v2->delay);
2355 if (ret)
2356 return ret;
2357
2358 if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
2359 tail_v2->preq = params->preq;
2360 direct_scan = tail_v2->direct_scan;
2361 } else {
2362 tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part;
2363 iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq,
2364 ¶ms->preq);
2365 direct_scan = tail_v1->direct_scan;
2366 }
2367 iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap);
2368 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
2369 params->n_channels, ssid_bitmap,
2370 cmd_data);
2371 return 0;
2372 }
2373
2374 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)2375 iwl_mvm_scan_umac_fill_general_p_v12(struct iwl_mvm *mvm,
2376 struct iwl_mvm_scan_params *params,
2377 struct ieee80211_vif *vif,
2378 struct iwl_scan_general_params_v11 *gp,
2379 u16 gen_flags, u8 gen_flags2,
2380 u32 version)
2381 {
2382 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2383
2384 iwl_mvm_scan_umac_dwell_v11(mvm, gp, params);
2385
2386 IWL_DEBUG_SCAN(mvm, "General: flags=0x%x, flags2=0x%x\n",
2387 gen_flags, gen_flags2);
2388
2389 gp->flags = cpu_to_le16(gen_flags);
2390 gp->flags2 = gen_flags2;
2391
2392 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1)
2393 gp->num_of_fragments[SCAN_LB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2394 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2)
2395 gp->num_of_fragments[SCAN_HB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2396
2397 mvm->scan_link_id = 0;
2398
2399 if (version < 16) {
2400 gp->scan_start_mac_or_link_id = scan_vif->id;
2401 } else {
2402 struct iwl_mvm_vif_link_info *link_info =
2403 scan_vif->link[params->tsf_report_link_id];
2404
2405 mvm->scan_link_id = params->tsf_report_link_id;
2406 if (!WARN_ON(!link_info))
2407 gp->scan_start_mac_or_link_id = link_info->fw_link_id;
2408 }
2409 }
2410
2411 static void
iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params * params,struct iwl_scan_probe_params_v3 * pp)2412 iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params *params,
2413 struct iwl_scan_probe_params_v3 *pp)
2414 {
2415 pp->preq = params->preq;
2416 pp->ssid_num = params->n_ssids;
2417 iwl_scan_build_ssids(params, pp->direct_scan, NULL);
2418 }
2419
2420 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)2421 iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params *params,
2422 struct iwl_scan_probe_params_v4 *pp,
2423 u32 *bitmap_ssid)
2424 {
2425 pp->preq = params->preq;
2426 iwl_scan_build_ssids(params, pp->direct_scan, bitmap_ssid);
2427 }
2428
2429 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)2430 iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm *mvm,
2431 struct iwl_mvm_scan_params *params,
2432 struct ieee80211_vif *vif,
2433 struct iwl_scan_channel_params_v4 *cp,
2434 u32 channel_cfg_flags)
2435 {
2436 cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2437 cp->count = params->n_channels;
2438 cp->num_of_aps_override = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2439
2440 iwl_mvm_umac_scan_cfg_channels_v4(mvm, params->channels, cp,
2441 params->n_channels,
2442 channel_cfg_flags,
2443 vif->type);
2444 }
2445
2446 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)2447 iwl_mvm_scan_umac_fill_ch_p_v7(struct iwl_mvm *mvm,
2448 struct iwl_mvm_scan_params *params,
2449 struct ieee80211_vif *vif,
2450 struct iwl_scan_channel_params_v7 *cp,
2451 u32 channel_cfg_flags,
2452 u32 version)
2453 {
2454 cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2455 cp->count = params->n_channels;
2456 cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2457 cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2458
2459 iwl_mvm_umac_scan_cfg_channels_v7(mvm, params->channels, cp,
2460 params->n_channels,
2461 channel_cfg_flags,
2462 vif->type, version);
2463
2464 if (params->enable_6ghz_passive) {
2465 struct ieee80211_supported_band *sband =
2466 &mvm->nvm_data->bands[NL80211_BAND_6GHZ];
2467 u32 i;
2468
2469 for (i = 0; i < sband->n_channels; i++) {
2470 struct ieee80211_channel *channel =
2471 &sband->channels[i];
2472
2473 struct iwl_scan_channel_cfg_umac *cfg =
2474 &cp->channel_config[cp->count];
2475
2476 if (!cfg80211_channel_is_psc(channel))
2477 continue;
2478
2479 cfg->channel_num = channel->hw_value;
2480 cfg->v5.iter_count = 1;
2481 cfg->v5.iter_interval = 0;
2482
2483 if (version < 17) {
2484 cfg->flags = 0;
2485 cfg->v2.band = PHY_BAND_6;
2486 } else {
2487 cfg->flags = cpu_to_le32(PHY_BAND_6 <<
2488 IWL_CHAN_CFG_FLAGS_BAND_POS);
2489 cfg->v5.psd_20 =
2490 IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
2491 }
2492 cp->count++;
2493 }
2494 }
2495 }
2496
iwl_mvm_scan_umac_v12(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2497 static int iwl_mvm_scan_umac_v12(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2498 struct iwl_mvm_scan_params *params, int type,
2499 int uid)
2500 {
2501 struct iwl_scan_req_umac_v12 *cmd = mvm->scan_cmd;
2502 struct iwl_scan_req_params_v12 *scan_p = &cmd->scan_params;
2503 int ret;
2504 u16 gen_flags;
2505
2506 cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(type));
2507 cmd->uid = cpu_to_le32(uid);
2508
2509 gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2510 iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
2511 &scan_p->general_params,
2512 gen_flags, 0, 12);
2513
2514 ret = iwl_mvm_fill_scan_sched_params(params,
2515 scan_p->periodic_params.schedule,
2516 &scan_p->periodic_params.delay);
2517 if (ret)
2518 return ret;
2519
2520 iwl_mvm_scan_umac_fill_probe_p_v3(params, &scan_p->probe_params);
2521 iwl_mvm_scan_umac_fill_ch_p_v4(mvm, params, vif,
2522 &scan_p->channel_params, 0);
2523
2524 return 0;
2525 }
2526
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)2527 static int iwl_mvm_scan_umac_v14_and_above(struct iwl_mvm *mvm,
2528 struct ieee80211_vif *vif,
2529 struct iwl_mvm_scan_params *params,
2530 int type, int uid, u32 version)
2531 {
2532 struct iwl_scan_req_umac_v17 *cmd = mvm->scan_cmd;
2533 struct iwl_scan_req_params_v17 *scan_p = &cmd->scan_params;
2534 struct iwl_scan_channel_params_v7 *cp = &scan_p->channel_params;
2535 struct iwl_scan_probe_params_v4 *pb = &scan_p->probe_params;
2536 int ret;
2537 u16 gen_flags;
2538 u8 gen_flags2;
2539 u32 bitmap_ssid = 0;
2540
2541 cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(type));
2542 cmd->uid = cpu_to_le32(uid);
2543
2544 gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2545
2546 if (version >= 15)
2547 gen_flags2 = iwl_mvm_scan_umac_flags2(mvm, params, vif, type,
2548 gen_flags);
2549 else
2550 gen_flags2 = 0;
2551
2552 iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
2553 &scan_p->general_params,
2554 gen_flags, gen_flags2, version);
2555
2556 ret = iwl_mvm_fill_scan_sched_params(params,
2557 scan_p->periodic_params.schedule,
2558 &scan_p->periodic_params.delay);
2559 if (ret)
2560 return ret;
2561
2562 if (!params->scan_6ghz) {
2563 iwl_mvm_scan_umac_fill_probe_p_v4(params,
2564 &scan_p->probe_params,
2565 &bitmap_ssid);
2566 iwl_mvm_scan_umac_fill_ch_p_v7(mvm, params, vif,
2567 &scan_p->channel_params,
2568 bitmap_ssid,
2569 version);
2570 return 0;
2571 }
2572
2573 pb->preq = params->preq;
2574
2575 iwl_mvm_umac_scan_fill_6g_chan_list(mvm, params, pb);
2576
2577 /* Explicitly clear the flags since most of them are not
2578 * relevant for 6 GHz scan.
2579 */
2580 cp->flags = 0;
2581 cp->count = iwl_mvm_umac_scan_cfg_channels_v7_6g(mvm, params,
2582 params->n_channels,
2583 pb, cp, vif->type,
2584 version);
2585 if (!cp->count)
2586 return -EINVAL;
2587
2588 if (!params->n_ssids ||
2589 (params->n_ssids == 1 && !params->ssids[0].ssid_len))
2590 cp->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER;
2591
2592 return 0;
2593 }
2594
iwl_mvm_scan_umac_v14(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2595 static int iwl_mvm_scan_umac_v14(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2596 struct iwl_mvm_scan_params *params, int type,
2597 int uid)
2598 {
2599 return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 14);
2600 }
2601
iwl_mvm_scan_umac_v15(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2602 static int iwl_mvm_scan_umac_v15(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2603 struct iwl_mvm_scan_params *params, int type,
2604 int uid)
2605 {
2606 return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 15);
2607 }
2608
iwl_mvm_scan_umac_v16(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2609 static int iwl_mvm_scan_umac_v16(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2610 struct iwl_mvm_scan_params *params, int type,
2611 int uid)
2612 {
2613 return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 16);
2614 }
2615
iwl_mvm_scan_umac_v17(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type,int uid)2616 static int iwl_mvm_scan_umac_v17(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2617 struct iwl_mvm_scan_params *params, int type,
2618 int uid)
2619 {
2620 return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 17);
2621 }
2622
iwl_mvm_num_scans(struct iwl_mvm * mvm)2623 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
2624 {
2625 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
2626 }
2627
iwl_mvm_check_running_scans(struct iwl_mvm * mvm,int type)2628 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
2629 {
2630 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2631 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2632
2633 /* This looks a bit arbitrary, but the idea is that if we run
2634 * out of possible simultaneous scans and the userspace is
2635 * trying to run a scan type that is already running, we
2636 * return -EBUSY. But if the userspace wants to start a
2637 * different type of scan, we stop the opposite type to make
2638 * space for the new request. The reason is backwards
2639 * compatibility with old wpa_supplicant that wouldn't stop a
2640 * scheduled scan before starting a normal scan.
2641 */
2642
2643 /* FW supports only a single periodic scan */
2644 if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2645 mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT))
2646 return -EBUSY;
2647
2648 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
2649 return 0;
2650
2651 /* Use a switch, even though this is a bitmask, so that more
2652 * than one bits set will fall in default and we will warn.
2653 */
2654 switch (type) {
2655 case IWL_MVM_SCAN_REGULAR:
2656 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2657 return -EBUSY;
2658 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2659 case IWL_MVM_SCAN_SCHED:
2660 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2661 return -EBUSY;
2662 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2663 case IWL_MVM_SCAN_NETDETECT:
2664 /* For non-unified images, there's no need to stop
2665 * anything for net-detect since the firmware is
2666 * restarted anyway. This way, any sched scans that
2667 * were running will be restarted when we resume.
2668 */
2669 if (!unified_image)
2670 return 0;
2671
2672 /* If this is a unified image and we ran out of scans,
2673 * we need to stop something. Prefer stopping regular
2674 * scans, because the results are useless at this
2675 * point, and we should be able to keep running
2676 * another scheduled scan while suspended.
2677 */
2678 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2679 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
2680 true);
2681 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2682 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
2683 true);
2684 /* Something is wrong if no scan was running but we
2685 * ran out of scans.
2686 */
2687 fallthrough;
2688 default:
2689 WARN_ON(1);
2690 break;
2691 }
2692
2693 return -EIO;
2694 }
2695
2696 #define SCAN_TIMEOUT 30000
2697
iwl_mvm_scan_timeout_wk(struct work_struct * work)2698 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
2699 {
2700 struct delayed_work *delayed_work = to_delayed_work(work);
2701 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
2702 scan_timeout_dwork);
2703
2704 IWL_ERR(mvm, "regular scan timed out\n");
2705
2706 iwl_force_nmi(mvm->trans);
2707 }
2708
iwl_mvm_fill_scan_type(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2709 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm,
2710 struct iwl_mvm_scan_params *params,
2711 struct ieee80211_vif *vif)
2712 {
2713 if (iwl_mvm_is_cdb_supported(mvm)) {
2714 params->type =
2715 iwl_mvm_get_scan_type_band(mvm, vif,
2716 NL80211_BAND_2GHZ);
2717 params->hb_type =
2718 iwl_mvm_get_scan_type_band(mvm, vif,
2719 NL80211_BAND_5GHZ);
2720 } else {
2721 params->type = iwl_mvm_get_scan_type(mvm, vif);
2722 }
2723 }
2724
2725 struct iwl_scan_umac_handler {
2726 u8 version;
2727 int (*handler)(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2728 struct iwl_mvm_scan_params *params, int type, int uid);
2729 };
2730
2731 #define IWL_SCAN_UMAC_HANDLER(_ver) { \
2732 .version = _ver, \
2733 .handler = iwl_mvm_scan_umac_v##_ver, \
2734 }
2735
2736 static const struct iwl_scan_umac_handler iwl_scan_umac_handlers[] = {
2737 /* set the newest version first to shorten the list traverse time */
2738 IWL_SCAN_UMAC_HANDLER(17),
2739 IWL_SCAN_UMAC_HANDLER(16),
2740 IWL_SCAN_UMAC_HANDLER(15),
2741 IWL_SCAN_UMAC_HANDLER(14),
2742 IWL_SCAN_UMAC_HANDLER(12),
2743 };
2744
iwl_mvm_mei_scan_work(struct work_struct * wk)2745 static void iwl_mvm_mei_scan_work(struct work_struct *wk)
2746 {
2747 struct iwl_mei_scan_filter *scan_filter =
2748 container_of(wk, struct iwl_mei_scan_filter, scan_work);
2749 struct iwl_mvm *mvm =
2750 container_of(scan_filter, struct iwl_mvm, mei_scan_filter);
2751 struct iwl_mvm_csme_conn_info *info;
2752 struct sk_buff *skb;
2753 u8 bssid[ETH_ALEN];
2754
2755 mutex_lock(&mvm->mutex);
2756 info = iwl_mvm_get_csme_conn_info(mvm);
2757 memcpy(bssid, info->conn_info.bssid, ETH_ALEN);
2758 mutex_unlock(&mvm->mutex);
2759
2760 while ((skb = skb_dequeue(&scan_filter->scan_res))) {
2761 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2762
2763 if (!memcmp(mgmt->bssid, bssid, ETH_ALEN))
2764 ieee80211_rx_irqsafe(mvm->hw, skb);
2765 else
2766 kfree_skb(skb);
2767 }
2768 }
2769
iwl_mvm_mei_scan_filter_init(struct iwl_mei_scan_filter * mei_scan_filter)2770 void iwl_mvm_mei_scan_filter_init(struct iwl_mei_scan_filter *mei_scan_filter)
2771 {
2772 skb_queue_head_init(&mei_scan_filter->scan_res);
2773 INIT_WORK(&mei_scan_filter->scan_work, iwl_mvm_mei_scan_work);
2774 }
2775
2776 /* In case CSME is connected and has link protection set, this function will
2777 * override the scan request to scan only the associated channel and only for
2778 * the associated SSID.
2779 */
iwl_mvm_mei_limited_scan(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params)2780 static void iwl_mvm_mei_limited_scan(struct iwl_mvm *mvm,
2781 struct iwl_mvm_scan_params *params)
2782 {
2783 struct iwl_mvm_csme_conn_info *info = iwl_mvm_get_csme_conn_info(mvm);
2784 struct iwl_mei_conn_info *conn_info;
2785 struct ieee80211_channel *chan;
2786 int scan_iters, i;
2787
2788 if (!info) {
2789 IWL_DEBUG_SCAN(mvm, "mei_limited_scan: no connection info\n");
2790 return;
2791 }
2792
2793 conn_info = &info->conn_info;
2794 if (!info->conn_info.lp_state || !info->conn_info.ssid_len)
2795 return;
2796
2797 if (!params->n_channels || !params->n_ssids)
2798 return;
2799
2800 mvm->mei_scan_filter.is_mei_limited_scan = true;
2801
2802 chan = ieee80211_get_channel(mvm->hw->wiphy,
2803 ieee80211_channel_to_frequency(conn_info->channel,
2804 conn_info->band));
2805 if (!chan) {
2806 IWL_DEBUG_SCAN(mvm,
2807 "Failed to get CSME channel (chan=%u band=%u)\n",
2808 conn_info->channel, conn_info->band);
2809 return;
2810 }
2811
2812 /* The mei filtered scan must find the AP, otherwise CSME will
2813 * take the NIC ownership. Add several iterations on the channel to
2814 * make the scan more robust.
2815 */
2816 scan_iters = min(IWL_MEI_SCAN_NUM_ITER, params->n_channels);
2817 params->n_channels = scan_iters;
2818 for (i = 0; i < scan_iters; i++)
2819 params->channels[i] = chan;
2820
2821 IWL_DEBUG_SCAN(mvm, "Mei scan: num iterations=%u\n", scan_iters);
2822
2823 params->n_ssids = 1;
2824 params->ssids[0].ssid_len = conn_info->ssid_len;
2825 memcpy(params->ssids[0].ssid, conn_info->ssid, conn_info->ssid_len);
2826 }
2827
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)2828 static int iwl_mvm_build_scan_cmd(struct iwl_mvm *mvm,
2829 struct ieee80211_vif *vif,
2830 struct iwl_host_cmd *hcmd,
2831 struct iwl_mvm_scan_params *params,
2832 int type)
2833 {
2834 int uid, i, err;
2835 u8 scan_ver;
2836
2837 lockdep_assert_held(&mvm->mutex);
2838 memset(mvm->scan_cmd, 0, mvm->scan_cmd_size);
2839
2840 iwl_mvm_mei_limited_scan(mvm, params);
2841
2842 if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2843 hcmd->id = SCAN_OFFLOAD_REQUEST_CMD;
2844
2845 return iwl_mvm_scan_lmac(mvm, vif, params);
2846 }
2847
2848 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
2849 if (uid < 0)
2850 return uid;
2851
2852 hcmd->id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_REQ_UMAC);
2853
2854 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
2855 IWL_FW_CMD_VER_UNKNOWN);
2856
2857 for (i = 0; i < ARRAY_SIZE(iwl_scan_umac_handlers); i++) {
2858 const struct iwl_scan_umac_handler *ver_handler =
2859 &iwl_scan_umac_handlers[i];
2860
2861 if (ver_handler->version != scan_ver)
2862 continue;
2863
2864 err = ver_handler->handler(mvm, vif, params, type, uid);
2865 return err ? : uid;
2866 }
2867
2868 err = iwl_mvm_scan_umac(mvm, vif, params, type, uid);
2869 if (err)
2870 return err;
2871
2872 return uid;
2873 }
2874
2875 struct iwl_mvm_scan_respect_p2p_go_iter_data {
2876 struct ieee80211_vif *current_vif;
2877 bool p2p_go;
2878 enum nl80211_band band;
2879 };
2880
iwl_mvm_scan_respect_p2p_go_iter(void * _data,u8 * mac,struct ieee80211_vif * vif)2881 static void iwl_mvm_scan_respect_p2p_go_iter(void *_data, u8 *mac,
2882 struct ieee80211_vif *vif)
2883 {
2884 struct iwl_mvm_scan_respect_p2p_go_iter_data *data = _data;
2885 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2886
2887 /* exclude the given vif */
2888 if (vif == data->current_vif)
2889 return;
2890
2891 if (ieee80211_vif_type_p2p(vif) == NL80211_IFTYPE_P2P_GO) {
2892 u32 link_id;
2893
2894 for (link_id = 0;
2895 link_id < ARRAY_SIZE(mvmvif->link);
2896 link_id++) {
2897 struct iwl_mvm_vif_link_info *link =
2898 mvmvif->link[link_id];
2899
2900 if (link && link->phy_ctxt->id < NUM_PHY_CTX &&
2901 (data->band == NUM_NL80211_BANDS ||
2902 link->phy_ctxt->channel->band == data->band)) {
2903 data->p2p_go = true;
2904 break;
2905 }
2906 }
2907 }
2908 }
2909
_iwl_mvm_get_respect_p2p_go(struct iwl_mvm * mvm,struct ieee80211_vif * vif,bool low_latency,enum nl80211_band band)2910 static bool _iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2911 struct ieee80211_vif *vif,
2912 bool low_latency,
2913 enum nl80211_band band)
2914 {
2915 struct iwl_mvm_scan_respect_p2p_go_iter_data data = {
2916 .current_vif = vif,
2917 .p2p_go = false,
2918 .band = band,
2919 };
2920
2921 if (!low_latency)
2922 return false;
2923
2924 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
2925 IEEE80211_IFACE_ITER_NORMAL,
2926 iwl_mvm_scan_respect_p2p_go_iter,
2927 &data);
2928
2929 return data.p2p_go;
2930 }
2931
iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm * mvm,struct ieee80211_vif * vif,enum nl80211_band band)2932 static bool iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm *mvm,
2933 struct ieee80211_vif *vif,
2934 enum nl80211_band band)
2935 {
2936 bool low_latency = iwl_mvm_low_latency_band(mvm, band);
2937
2938 return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency, band);
2939 }
2940
iwl_mvm_get_respect_p2p_go(struct iwl_mvm * mvm,struct ieee80211_vif * vif)2941 static bool iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2942 struct ieee80211_vif *vif)
2943 {
2944 bool low_latency = iwl_mvm_low_latency(mvm);
2945
2946 return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency,
2947 NUM_NL80211_BANDS);
2948 }
2949
iwl_mvm_fill_respect_p2p_go(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)2950 static void iwl_mvm_fill_respect_p2p_go(struct iwl_mvm *mvm,
2951 struct iwl_mvm_scan_params *params,
2952 struct ieee80211_vif *vif)
2953 {
2954 if (iwl_mvm_is_cdb_supported(mvm)) {
2955 params->respect_p2p_go =
2956 iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2957 NL80211_BAND_2GHZ);
2958 params->respect_p2p_go_hb =
2959 iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2960 NL80211_BAND_5GHZ);
2961 } else {
2962 params->respect_p2p_go = iwl_mvm_get_respect_p2p_go(mvm, vif);
2963 }
2964 }
2965
_iwl_mvm_single_scan_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_scan_request * req,struct ieee80211_scan_ies * ies,int type)2966 static int _iwl_mvm_single_scan_start(struct iwl_mvm *mvm,
2967 struct ieee80211_vif *vif,
2968 struct cfg80211_scan_request *req,
2969 struct ieee80211_scan_ies *ies,
2970 int type)
2971 {
2972 struct iwl_host_cmd hcmd = {
2973 .len = { iwl_mvm_scan_size(mvm), },
2974 .data = { mvm->scan_cmd, },
2975 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
2976 };
2977 struct iwl_mvm_scan_params params = {};
2978 int ret, uid;
2979 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
2980
2981 lockdep_assert_held(&mvm->mutex);
2982
2983 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2984 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
2985 return -EBUSY;
2986 }
2987
2988 ret = iwl_mvm_check_running_scans(mvm, type);
2989 if (ret)
2990 return ret;
2991
2992 /* we should have failed registration if scan_cmd was NULL */
2993 if (WARN_ON(!mvm->scan_cmd))
2994 return -ENOMEM;
2995
2996 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
2997 return -ENOBUFS;
2998
2999 params.n_ssids = req->n_ssids;
3000 params.flags = req->flags;
3001 params.n_channels = req->n_channels;
3002 params.delay = 0;
3003 params.ssids = req->ssids;
3004 params.channels = req->channels;
3005 params.mac_addr = req->mac_addr;
3006 params.mac_addr_mask = req->mac_addr_mask;
3007 params.no_cck = req->no_cck;
3008 params.pass_all = true;
3009 params.n_match_sets = 0;
3010 params.match_sets = NULL;
3011 ether_addr_copy(params.bssid, req->bssid);
3012
3013 params.scan_plans = &scan_plan;
3014 params.n_scan_plans = 1;
3015
3016 params.n_6ghz_params = req->n_6ghz_params;
3017 params.scan_6ghz_params = req->scan_6ghz_params;
3018 params.scan_6ghz = req->scan_6ghz;
3019 iwl_mvm_fill_scan_type(mvm, ¶ms, vif);
3020 iwl_mvm_fill_respect_p2p_go(mvm, ¶ms, vif);
3021
3022 if (req->duration)
3023 params.iter_notif = true;
3024
3025 params.tsf_report_link_id = req->tsf_report_link_id;
3026 if (params.tsf_report_link_id < 0)
3027 params.tsf_report_link_id = 0;
3028
3029 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms);
3030
3031 iwl_mvm_scan_6ghz_passive_scan(mvm, ¶ms, vif);
3032
3033 uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, ¶ms, type);
3034
3035 if (uid < 0)
3036 return uid;
3037
3038 iwl_mvm_pause_tcm(mvm, false);
3039
3040 ret = iwl_mvm_send_cmd(mvm, &hcmd);
3041 if (ret) {
3042 /* If the scan failed, it usually means that the FW was unable
3043 * to allocate the time events. Warn on it, but maybe we
3044 * should try to send the command again with different params.
3045 */
3046 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
3047 iwl_mvm_resume_tcm(mvm);
3048 return ret;
3049 }
3050
3051 IWL_DEBUG_SCAN(mvm, "Scan request send success: type=%u, uid=%u\n",
3052 type, uid);
3053
3054 mvm->scan_uid_status[uid] = type;
3055 mvm->scan_status |= type;
3056
3057 if (type == IWL_MVM_SCAN_REGULAR) {
3058 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
3059 schedule_delayed_work(&mvm->scan_timeout_dwork,
3060 msecs_to_jiffies(SCAN_TIMEOUT));
3061 }
3062
3063 if (params.enable_6ghz_passive)
3064 mvm->last_6ghz_passive_scan_jiffies = jiffies;
3065
3066 return 0;
3067 }
3068
iwl_mvm_reg_scan_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_scan_request * req,struct ieee80211_scan_ies * ies)3069 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
3070 struct cfg80211_scan_request *req,
3071 struct ieee80211_scan_ies *ies)
3072 {
3073 return _iwl_mvm_single_scan_start(mvm, vif, req, ies,
3074 IWL_MVM_SCAN_REGULAR);
3075 }
3076
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)3077 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
3078 struct ieee80211_vif *vif,
3079 struct cfg80211_sched_scan_request *req,
3080 struct ieee80211_scan_ies *ies,
3081 int type)
3082 {
3083 struct iwl_host_cmd hcmd = {
3084 .len = { iwl_mvm_scan_size(mvm), },
3085 .data = { mvm->scan_cmd, },
3086 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
3087 };
3088 struct iwl_mvm_scan_params params = {};
3089 int ret, uid;
3090 int i, j;
3091 bool non_psc_included = false;
3092
3093 lockdep_assert_held(&mvm->mutex);
3094
3095 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
3096 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
3097 return -EBUSY;
3098 }
3099
3100 ret = iwl_mvm_check_running_scans(mvm, type);
3101 if (ret)
3102 return ret;
3103
3104 /* we should have failed registration if scan_cmd was NULL */
3105 if (WARN_ON(!mvm->scan_cmd))
3106 return -ENOMEM;
3107
3108
3109 params.n_ssids = req->n_ssids;
3110 params.flags = req->flags;
3111 params.n_channels = req->n_channels;
3112 params.ssids = req->ssids;
3113 params.channels = req->channels;
3114 params.mac_addr = req->mac_addr;
3115 params.mac_addr_mask = req->mac_addr_mask;
3116 params.no_cck = false;
3117 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
3118 params.n_match_sets = req->n_match_sets;
3119 params.match_sets = req->match_sets;
3120 eth_broadcast_addr(params.bssid);
3121 if (!req->n_scan_plans)
3122 return -EINVAL;
3123
3124 params.n_scan_plans = req->n_scan_plans;
3125 params.scan_plans = req->scan_plans;
3126
3127 iwl_mvm_fill_scan_type(mvm, ¶ms, vif);
3128 iwl_mvm_fill_respect_p2p_go(mvm, ¶ms, vif);
3129
3130 /* In theory, LMAC scans can handle a 32-bit delay, but since
3131 * waiting for over 18 hours to start the scan is a bit silly
3132 * and to keep it aligned with UMAC scans (which only support
3133 * 16-bit delays), trim it down to 16-bits.
3134 */
3135 if (req->delay > U16_MAX) {
3136 IWL_DEBUG_SCAN(mvm,
3137 "delay value is > 16-bits, set to max possible\n");
3138 params.delay = U16_MAX;
3139 } else {
3140 params.delay = req->delay;
3141 }
3142
3143 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
3144 if (ret)
3145 return ret;
3146
3147 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms);
3148
3149 /* for 6 GHZ band only PSC channels need to be added */
3150 for (i = 0; i < params.n_channels; i++) {
3151 struct ieee80211_channel *channel = params.channels[i];
3152
3153 if (channel->band == NL80211_BAND_6GHZ &&
3154 !cfg80211_channel_is_psc(channel)) {
3155 non_psc_included = true;
3156 break;
3157 }
3158 }
3159
3160 if (non_psc_included) {
3161 params.channels = kmemdup(params.channels,
3162 sizeof(params.channels[0]) *
3163 params.n_channels,
3164 GFP_KERNEL);
3165 if (!params.channels)
3166 return -ENOMEM;
3167
3168 for (i = j = 0; i < params.n_channels; i++) {
3169 if (params.channels[i]->band == NL80211_BAND_6GHZ &&
3170 !cfg80211_channel_is_psc(params.channels[i]))
3171 continue;
3172 params.channels[j++] = params.channels[i];
3173 }
3174 params.n_channels = j;
3175 }
3176
3177 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, params.n_channels)) {
3178 ret = -ENOBUFS;
3179 goto out;
3180 }
3181
3182 uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, ¶ms, type);
3183 if (uid < 0) {
3184 ret = uid;
3185 goto out;
3186 }
3187
3188 ret = iwl_mvm_send_cmd(mvm, &hcmd);
3189 if (!ret) {
3190 IWL_DEBUG_SCAN(mvm,
3191 "Sched scan request send success: type=%u, uid=%u\n",
3192 type, uid);
3193 mvm->scan_uid_status[uid] = type;
3194 mvm->scan_status |= type;
3195 } else {
3196 /* If the scan failed, it usually means that the FW was unable
3197 * to allocate the time events. Warn on it, but maybe we
3198 * should try to send the command again with different params.
3199 */
3200 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
3201 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3202 }
3203
3204 out:
3205 if (non_psc_included)
3206 kfree(params.channels);
3207 return ret;
3208 }
3209
iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3210 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
3211 struct iwl_rx_cmd_buffer *rxb)
3212 {
3213 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3214 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
3215 u32 uid = __le32_to_cpu(notif->uid);
3216 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
3217
3218 mvm->mei_scan_filter.is_mei_limited_scan = false;
3219
3220 IWL_DEBUG_SCAN(mvm,
3221 "Scan completed: uid=%u type=%u, status=%s, EBS=%s\n",
3222 uid, mvm->scan_uid_status[uid],
3223 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
3224 "completed" : "aborted",
3225 iwl_mvm_ebs_status_str(notif->ebs_status));
3226
3227 IWL_DEBUG_SCAN(mvm, "Scan completed: scan_status=0x%x\n",
3228 mvm->scan_status);
3229
3230 IWL_DEBUG_SCAN(mvm,
3231 "Scan completed: line=%u, iter=%u, elapsed time=%u\n",
3232 notif->last_schedule, notif->last_iter,
3233 __le32_to_cpu(notif->time_from_last_iter));
3234
3235 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
3236 return;
3237
3238 /* if the scan is already stopping, we don't need to notify mac80211 */
3239 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
3240 struct cfg80211_scan_info info = {
3241 .aborted = aborted,
3242 .scan_start_tsf = mvm->scan_start,
3243 };
3244 struct iwl_mvm_vif *scan_vif = mvm->scan_vif;
3245 struct iwl_mvm_vif_link_info *link_info =
3246 scan_vif->link[mvm->scan_link_id];
3247
3248 /* It is possible that by the time the scan is complete the link
3249 * was already removed and is not valid.
3250 */
3251 if (link_info)
3252 memcpy(info.tsf_bssid, link_info->bssid, ETH_ALEN);
3253 else
3254 IWL_DEBUG_SCAN(mvm, "Scan link is no longer valid\n");
3255
3256 ieee80211_scan_completed(mvm->hw, &info);
3257 mvm->scan_vif = NULL;
3258 cancel_delayed_work(&mvm->scan_timeout_dwork);
3259 iwl_mvm_resume_tcm(mvm);
3260 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
3261 ieee80211_sched_scan_stopped(mvm->hw);
3262 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3263 }
3264
3265 mvm->scan_status &= ~mvm->scan_uid_status[uid];
3266
3267 IWL_DEBUG_SCAN(mvm, "Scan completed: after update: scan_status=0x%x\n",
3268 mvm->scan_status);
3269
3270 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
3271 notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
3272 mvm->last_ebs_successful = false;
3273
3274 mvm->scan_uid_status[uid] = 0;
3275 }
3276
iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3277 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
3278 struct iwl_rx_cmd_buffer *rxb)
3279 {
3280 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3281 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
3282
3283 mvm->scan_start = le64_to_cpu(notif->start_tsf);
3284
3285 IWL_DEBUG_SCAN(mvm,
3286 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
3287 notif->status, notif->scanned_channels);
3288
3289 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
3290 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
3291 ieee80211_sched_scan_results(mvm->hw);
3292 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
3293 }
3294
3295 IWL_DEBUG_SCAN(mvm,
3296 "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
3297 mvm->scan_start);
3298 }
3299
iwl_mvm_umac_scan_abort(struct iwl_mvm * mvm,int type,bool * wait)3300 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type, bool *wait)
3301 {
3302 struct iwl_umac_scan_abort abort_cmd = {};
3303 struct iwl_host_cmd cmd = {
3304 .id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_ABORT_UMAC),
3305 .len = { sizeof(abort_cmd), },
3306 .data = { &abort_cmd, },
3307 .flags = CMD_SEND_IN_RFKILL,
3308 };
3309
3310 int uid, ret;
3311 u32 status = IWL_UMAC_SCAN_ABORT_STATUS_NOT_FOUND;
3312
3313 lockdep_assert_held(&mvm->mutex);
3314
3315 *wait = true;
3316
3317 /* We should always get a valid index here, because we already
3318 * checked that this type of scan was running in the generic
3319 * code.
3320 */
3321 uid = iwl_mvm_scan_uid_by_status(mvm, type);
3322 if (WARN_ON_ONCE(uid < 0))
3323 return uid;
3324
3325 abort_cmd.uid = cpu_to_le32(uid);
3326
3327 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
3328
3329 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
3330
3331 IWL_DEBUG_SCAN(mvm, "Scan abort: ret=%d, status=%u\n", ret, status);
3332 if (!ret)
3333 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
3334
3335 /* Handle the case that the FW is no longer familiar with the scan that
3336 * is to be stopped. In such a case, it is expected that the scan
3337 * complete notification was already received but not yet processed.
3338 * In such a case, there is no need to wait for a scan complete
3339 * notification and the flow should continue similar to the case that
3340 * the scan was really aborted.
3341 */
3342 if (status == IWL_UMAC_SCAN_ABORT_STATUS_NOT_FOUND) {
3343 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
3344 *wait = false;
3345 }
3346
3347 return ret;
3348 }
3349
iwl_mvm_scan_stop_wait(struct iwl_mvm * mvm,int type)3350 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
3351 {
3352 struct iwl_notification_wait wait_scan_done;
3353 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
3354 SCAN_OFFLOAD_COMPLETE, };
3355 int ret;
3356 bool wait = true;
3357
3358 lockdep_assert_held(&mvm->mutex);
3359
3360 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
3361 scan_done_notif,
3362 ARRAY_SIZE(scan_done_notif),
3363 NULL, NULL);
3364
3365 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
3366
3367 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
3368 ret = iwl_mvm_umac_scan_abort(mvm, type, &wait);
3369 else
3370 ret = iwl_mvm_lmac_scan_abort(mvm);
3371
3372 if (ret) {
3373 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
3374 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
3375 return ret;
3376 } else if (!wait) {
3377 IWL_DEBUG_SCAN(mvm, "no need to wait for scan type %d\n", type);
3378 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
3379 return 0;
3380 }
3381
3382 return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done,
3383 1 * HZ);
3384 }
3385
iwl_scan_req_umac_get_size(u8 scan_ver)3386 static size_t iwl_scan_req_umac_get_size(u8 scan_ver)
3387 {
3388 switch (scan_ver) {
3389 case 12:
3390 return sizeof(struct iwl_scan_req_umac_v12);
3391 case 14:
3392 case 15:
3393 case 16:
3394 case 17:
3395 return sizeof(struct iwl_scan_req_umac_v17);
3396 }
3397
3398 return 0;
3399 }
3400
iwl_mvm_scan_size(struct iwl_mvm * mvm)3401 size_t iwl_mvm_scan_size(struct iwl_mvm *mvm)
3402 {
3403 int base_size, tail_size;
3404 u8 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
3405 IWL_FW_CMD_VER_UNKNOWN);
3406
3407 base_size = iwl_scan_req_umac_get_size(scan_ver);
3408 if (base_size)
3409 return base_size;
3410
3411
3412 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
3413 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
3414 else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
3415 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
3416 else if (iwl_mvm_cdb_scan_api(mvm))
3417 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
3418 else
3419 base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
3420
3421 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3422 if (iwl_mvm_is_scan_ext_chan_supported(mvm))
3423 tail_size = sizeof(struct iwl_scan_req_umac_tail_v2);
3424 else
3425 tail_size = sizeof(struct iwl_scan_req_umac_tail_v1);
3426
3427 return base_size +
3428 sizeof(struct iwl_scan_channel_cfg_umac) *
3429 mvm->fw->ucode_capa.n_scan_channels +
3430 tail_size;
3431 }
3432 return sizeof(struct iwl_scan_req_lmac) +
3433 sizeof(struct iwl_scan_channel_cfg_lmac) *
3434 mvm->fw->ucode_capa.n_scan_channels +
3435 sizeof(struct iwl_scan_probe_req_v1);
3436 }
3437
3438 /*
3439 * This function is used in nic restart flow, to inform mac80211 about scans
3440 * that was aborted by restart flow or by an assert.
3441 */
iwl_mvm_report_scan_aborted(struct iwl_mvm * mvm)3442 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
3443 {
3444 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3445 int uid, i;
3446
3447 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
3448 if (uid >= 0) {
3449 struct cfg80211_scan_info info = {
3450 .aborted = true,
3451 };
3452
3453 cancel_delayed_work(&mvm->scan_timeout_dwork);
3454
3455 ieee80211_scan_completed(mvm->hw, &info);
3456 mvm->scan_uid_status[uid] = 0;
3457 }
3458 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
3459 if (uid >= 0) {
3460 /* Sched scan will be restarted by mac80211 in
3461 * restart_hw, so do not report if FW is about to be
3462 * restarted.
3463 */
3464 if (!iwlwifi_mod_params.fw_restart)
3465 ieee80211_sched_scan_stopped(mvm->hw);
3466 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3467 mvm->scan_uid_status[uid] = 0;
3468 }
3469
3470 uid = iwl_mvm_scan_uid_by_status(mvm,
3471 IWL_MVM_SCAN_STOPPING_REGULAR);
3472 if (uid >= 0)
3473 mvm->scan_uid_status[uid] = 0;
3474
3475 uid = iwl_mvm_scan_uid_by_status(mvm,
3476 IWL_MVM_SCAN_STOPPING_SCHED);
3477 if (uid >= 0)
3478 mvm->scan_uid_status[uid] = 0;
3479
3480 uid = iwl_mvm_scan_uid_by_status(mvm,
3481 IWL_MVM_SCAN_STOPPING_INT_MLO);
3482 if (uid >= 0)
3483 mvm->scan_uid_status[uid] = 0;
3484
3485 /* We shouldn't have any UIDs still set. Loop over all the
3486 * UIDs to make sure there's nothing left there and warn if
3487 * any is found.
3488 */
3489 for (i = 0; i < mvm->max_scans; i++) {
3490 if (WARN_ONCE(mvm->scan_uid_status[i],
3491 "UMAC scan UID %d status was not cleaned\n",
3492 i))
3493 mvm->scan_uid_status[i] = 0;
3494 }
3495 } else {
3496 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
3497 struct cfg80211_scan_info info = {
3498 .aborted = true,
3499 };
3500
3501 cancel_delayed_work(&mvm->scan_timeout_dwork);
3502 ieee80211_scan_completed(mvm->hw, &info);
3503 }
3504
3505 /* Sched scan will be restarted by mac80211 in
3506 * restart_hw, so do not report if FW is about to be
3507 * restarted.
3508 */
3509 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
3510 !iwlwifi_mod_params.fw_restart) {
3511 ieee80211_sched_scan_stopped(mvm->hw);
3512 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3513 }
3514 }
3515 }
3516
iwl_mvm_scan_stop(struct iwl_mvm * mvm,int type,bool notify)3517 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
3518 {
3519 int ret;
3520
3521 IWL_DEBUG_SCAN(mvm,
3522 "Request to stop scan: type=0x%x, status=0x%x\n",
3523 type, mvm->scan_status);
3524
3525 if (!(mvm->scan_status & type))
3526 return 0;
3527
3528 if (!iwl_trans_device_enabled(mvm->trans)) {
3529 ret = 0;
3530 goto out;
3531 }
3532
3533 ret = iwl_mvm_scan_stop_wait(mvm, type);
3534 if (!ret)
3535 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
3536 else
3537 IWL_DEBUG_SCAN(mvm, "Failed to stop scan\n");
3538
3539 out:
3540 /* Clear the scan status so the next scan requests will
3541 * succeed and mark the scan as stopping, so that the Rx
3542 * handler doesn't do anything, as the scan was stopped from
3543 * above.
3544 */
3545 mvm->scan_status &= ~type;
3546
3547 if (type == IWL_MVM_SCAN_REGULAR) {
3548 cancel_delayed_work(&mvm->scan_timeout_dwork);
3549 if (notify) {
3550 struct cfg80211_scan_info info = {
3551 .aborted = true,
3552 };
3553
3554 ieee80211_scan_completed(mvm->hw, &info);
3555 }
3556 } else if (notify) {
3557 ieee80211_sched_scan_stopped(mvm->hw);
3558 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3559 }
3560
3561 return ret;
3562 }
3563
iwl_mvm_chanidx_from_phy(struct iwl_mvm * mvm,enum nl80211_band band,u16 phy_chan_num)3564 static int iwl_mvm_chanidx_from_phy(struct iwl_mvm *mvm,
3565 enum nl80211_band band,
3566 u16 phy_chan_num)
3567 {
3568 struct ieee80211_supported_band *sband = mvm->hw->wiphy->bands[band];
3569 int chan_idx;
3570
3571 if (WARN_ON_ONCE(!sband))
3572 return -EINVAL;
3573
3574 for (chan_idx = 0; chan_idx < sband->n_channels; chan_idx++) {
3575 struct ieee80211_channel *channel = &sband->channels[chan_idx];
3576
3577 if (channel->hw_value == phy_chan_num)
3578 return chan_idx;
3579 }
3580
3581 return -EINVAL;
3582 }
3583
iwl_mvm_rx_channel_survey_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)3584 void iwl_mvm_rx_channel_survey_notif(struct iwl_mvm *mvm,
3585 struct iwl_rx_cmd_buffer *rxb)
3586 {
3587 struct iwl_rx_packet *pkt = rxb_addr(rxb);
3588 const struct iwl_umac_scan_channel_survey_notif *notif =
3589 (void *)pkt->data;
3590 struct iwl_mvm_acs_survey_channel *info;
3591 enum nl80211_band band;
3592 int chan_idx;
3593
3594 lockdep_assert_held(&mvm->mutex);
3595
3596 if (!mvm->acs_survey) {
3597 size_t n_channels = 0;
3598
3599 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3600 if (!mvm->hw->wiphy->bands[band])
3601 continue;
3602
3603 n_channels += mvm->hw->wiphy->bands[band]->n_channels;
3604 }
3605
3606 mvm->acs_survey = kzalloc_flex(*mvm->acs_survey, channels,
3607 n_channels);
3608
3609 if (!mvm->acs_survey)
3610 return;
3611
3612 mvm->acs_survey->n_channels = n_channels;
3613 n_channels = 0;
3614 for (band = 0; band < NUM_NL80211_BANDS; band++) {
3615 if (!mvm->hw->wiphy->bands[band])
3616 continue;
3617
3618 mvm->acs_survey->bands[band] =
3619 &mvm->acs_survey->channels[n_channels];
3620 n_channels += mvm->hw->wiphy->bands[band]->n_channels;
3621 }
3622 }
3623
3624 band = iwl_mvm_nl80211_band_from_phy(le32_to_cpu(notif->band));
3625 chan_idx = iwl_mvm_chanidx_from_phy(mvm, band,
3626 le32_to_cpu(notif->channel));
3627 if (WARN_ON_ONCE(chan_idx < 0))
3628 return;
3629
3630 IWL_DEBUG_SCAN(mvm, "channel survey received for freq %d\n",
3631 mvm->hw->wiphy->bands[band]->channels[chan_idx].center_freq);
3632
3633 info = &mvm->acs_survey->bands[band][chan_idx];
3634
3635 /* Times are all in ms */
3636 info->time = le32_to_cpu(notif->active_time);
3637 info->time_busy = le32_to_cpu(notif->busy_time);
3638 info->time_rx = le32_to_cpu(notif->rx_time);
3639 info->time_tx = le32_to_cpu(notif->tx_time);
3640 info->noise =
3641 iwl_average_neg_dbm(notif->noise, ARRAY_SIZE(notif->noise));
3642 }
3643