1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
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26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 Intel Deutschland GmbH
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54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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66 *****************************************************************************/
67
68 #include <linux/etherdevice.h>
69 #include <net/mac80211.h>
70
71 #include "mvm.h"
72 #include "fw-api-scan.h"
73 #include "iwl-io.h"
74
75 #define IWL_DENSE_EBS_SCAN_RATIO 5
76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
77
78 enum iwl_mvm_traffic_load {
79 IWL_MVM_TRAFFIC_LOW,
80 IWL_MVM_TRAFFIC_MEDIUM,
81 IWL_MVM_TRAFFIC_HIGH,
82 };
83
84 struct iwl_mvm_scan_timing_params {
85 u32 dwell_active;
86 u32 dwell_passive;
87 u32 dwell_fragmented;
88 u32 dwell_extended;
89 u32 suspend_time;
90 u32 max_out_time;
91 };
92
93 static struct iwl_mvm_scan_timing_params scan_timing[] = {
94 [IWL_SCAN_TYPE_UNASSOC] = {
95 .dwell_active = 10,
96 .dwell_passive = 110,
97 .dwell_fragmented = 44,
98 .dwell_extended = 90,
99 .suspend_time = 0,
100 .max_out_time = 0,
101 },
102 [IWL_SCAN_TYPE_WILD] = {
103 .dwell_active = 10,
104 .dwell_passive = 110,
105 .dwell_fragmented = 44,
106 .dwell_extended = 90,
107 .suspend_time = 30,
108 .max_out_time = 120,
109 },
110 [IWL_SCAN_TYPE_MILD] = {
111 .dwell_active = 10,
112 .dwell_passive = 110,
113 .dwell_fragmented = 44,
114 .dwell_extended = 90,
115 .suspend_time = 120,
116 .max_out_time = 120,
117 },
118 [IWL_SCAN_TYPE_FRAGMENTED] = {
119 .dwell_active = 10,
120 .dwell_passive = 110,
121 .dwell_fragmented = 44,
122 .suspend_time = 95,
123 .max_out_time = 44,
124 },
125 };
126
127 struct iwl_mvm_scan_params {
128 enum iwl_mvm_scan_type type;
129 u32 n_channels;
130 u16 delay;
131 int n_ssids;
132 struct cfg80211_ssid *ssids;
133 struct ieee80211_channel **channels;
134 u32 flags;
135 u8 *mac_addr;
136 u8 *mac_addr_mask;
137 bool no_cck;
138 bool pass_all;
139 int n_match_sets;
140 struct iwl_scan_probe_req preq;
141 struct cfg80211_match_set *match_sets;
142 int n_scan_plans;
143 struct cfg80211_sched_scan_plan *scan_plans;
144 u32 measurement_dwell;
145 };
146
iwl_mvm_scan_rx_ant(struct iwl_mvm * mvm)147 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
148 {
149 if (mvm->scan_rx_ant != ANT_NONE)
150 return mvm->scan_rx_ant;
151 return iwl_mvm_get_valid_rx_ant(mvm);
152 }
153
iwl_mvm_scan_rx_chain(struct iwl_mvm * mvm)154 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
155 {
156 u16 rx_chain;
157 u8 rx_ant;
158
159 rx_ant = iwl_mvm_scan_rx_ant(mvm);
160 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
161 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
162 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
163 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
164 return cpu_to_le16(rx_chain);
165 }
166
iwl_mvm_scan_rxon_flags(enum nl80211_band band)167 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band)
168 {
169 if (band == NL80211_BAND_2GHZ)
170 return cpu_to_le32(PHY_BAND_24);
171 else
172 return cpu_to_le32(PHY_BAND_5);
173 }
174
175 static inline __le32
iwl_mvm_scan_rate_n_flags(struct iwl_mvm * mvm,enum nl80211_band band,bool no_cck)176 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
177 bool no_cck)
178 {
179 u32 tx_ant;
180
181 mvm->scan_last_antenna_idx =
182 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
183 mvm->scan_last_antenna_idx);
184 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
185
186 if (band == NL80211_BAND_2GHZ && !no_cck)
187 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
188 tx_ant);
189 else
190 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
191 }
192
iwl_mvm_scan_condition_iterator(void * data,u8 * mac,struct ieee80211_vif * vif)193 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
194 struct ieee80211_vif *vif)
195 {
196 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
197 int *global_cnt = data;
198
199 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
200 mvmvif->phy_ctxt->id < MAX_PHYS)
201 *global_cnt += 1;
202 }
203
iwl_mvm_get_traffic_load(struct iwl_mvm * mvm)204 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
205 {
206 return IWL_MVM_TRAFFIC_LOW;
207 }
208
209 static enum
iwl_mvm_get_scan_type(struct iwl_mvm * mvm,bool p2p_device)210 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
211 {
212 int global_cnt = 0;
213 enum iwl_mvm_traffic_load load;
214 bool low_latency;
215
216 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
217 IEEE80211_IFACE_ITER_NORMAL,
218 iwl_mvm_scan_condition_iterator,
219 &global_cnt);
220 if (!global_cnt)
221 return IWL_SCAN_TYPE_UNASSOC;
222
223 load = iwl_mvm_get_traffic_load(mvm);
224 low_latency = iwl_mvm_low_latency(mvm);
225
226 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
227 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
228 return IWL_SCAN_TYPE_FRAGMENTED;
229
230 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
231 return IWL_SCAN_TYPE_MILD;
232
233 return IWL_SCAN_TYPE_WILD;
234 }
235
236 static int
iwl_mvm_get_measurement_dwell(struct iwl_mvm * mvm,struct cfg80211_scan_request * req,struct iwl_mvm_scan_params * params)237 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm,
238 struct cfg80211_scan_request *req,
239 struct iwl_mvm_scan_params *params)
240 {
241 if (!req->duration)
242 return 0;
243
244 if (req->duration_mandatory &&
245 req->duration > scan_timing[params->type].max_out_time) {
246 IWL_DEBUG_SCAN(mvm,
247 "Measurement scan - too long dwell %hu (max out time %u)\n",
248 req->duration,
249 scan_timing[params->type].max_out_time);
250 return -EOPNOTSUPP;
251 }
252
253 return min_t(u32, (u32)req->duration,
254 scan_timing[params->type].max_out_time);
255 }
256
iwl_mvm_rrm_scan_needed(struct iwl_mvm * mvm)257 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
258 {
259 /* require rrm scan whenever the fw supports it */
260 return fw_has_capa(&mvm->fw->ucode_capa,
261 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
262 }
263
iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm * mvm)264 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
265 {
266 int max_probe_len;
267
268 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
269
270 /* we create the 802.11 header and SSID element */
271 max_probe_len -= 24 + 2;
272
273 /* DS parameter set element is added on 2.4GHZ band if required */
274 if (iwl_mvm_rrm_scan_needed(mvm))
275 max_probe_len -= 3;
276
277 return max_probe_len;
278 }
279
iwl_mvm_max_scan_ie_len(struct iwl_mvm * mvm)280 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
281 {
282 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
283
284 /* TODO: [BUG] This function should return the maximum allowed size of
285 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
286 * in the same command. So the correct implementation of this function
287 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
288 * command has only 512 bytes and it would leave us with about 240
289 * bytes for scan IEs, which is clearly not enough. So meanwhile
290 * we will report an incorrect value. This may result in a failure to
291 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
292 * functions with -ENOBUFS, if a large enough probe will be provided.
293 */
294 return max_ie_len;
295 }
296
iwl_mvm_dump_channel_list(struct iwl_scan_results_notif * res,int num_res,u8 * buf,size_t buf_size)297 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
298 int num_res, u8 *buf, size_t buf_size)
299 {
300 int i;
301 u8 *pos = buf, *end = buf + buf_size;
302
303 for (i = 0; pos < end && i < num_res; i++)
304 pos += snprintf(pos, end - pos, " %u", res[i].channel);
305
306 /* terminate the string in case the buffer was too short */
307 *(buf + buf_size - 1) = '\0';
308
309 return buf;
310 }
311
iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)312 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
313 struct iwl_rx_cmd_buffer *rxb)
314 {
315 struct iwl_rx_packet *pkt = rxb_addr(rxb);
316 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
317 u8 buf[256];
318
319 IWL_DEBUG_SCAN(mvm,
320 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
321 notif->status, notif->scanned_channels,
322 iwl_mvm_dump_channel_list(notif->results,
323 notif->scanned_channels, buf,
324 sizeof(buf)));
325
326 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
327 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
328 ieee80211_sched_scan_results(mvm->hw);
329 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
330 }
331 }
332
iwl_mvm_rx_scan_match_found(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)333 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
334 struct iwl_rx_cmd_buffer *rxb)
335 {
336 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
337 ieee80211_sched_scan_results(mvm->hw);
338 }
339
iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)340 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
341 {
342 switch (status) {
343 case IWL_SCAN_EBS_SUCCESS:
344 return "successful";
345 case IWL_SCAN_EBS_INACTIVE:
346 return "inactive";
347 case IWL_SCAN_EBS_FAILED:
348 case IWL_SCAN_EBS_CHAN_NOT_FOUND:
349 default:
350 return "failed";
351 }
352 }
353
iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)354 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
355 struct iwl_rx_cmd_buffer *rxb)
356 {
357 struct iwl_rx_packet *pkt = rxb_addr(rxb);
358 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
359 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
360
361 /* If this happens, the firmware has mistakenly sent an LMAC
362 * notification during UMAC scans -- warn and ignore it.
363 */
364 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
365 IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
366 return;
367
368 /* scan status must be locked for proper checking */
369 lockdep_assert_held(&mvm->mutex);
370
371 /* We first check if we were stopping a scan, in which case we
372 * just clear the stopping flag. Then we check if it was a
373 * firmware initiated stop, in which case we need to inform
374 * mac80211.
375 * Note that we can have a stopping and a running scan
376 * simultaneously, but we can't have two different types of
377 * scans stopping or running at the same time (since LMAC
378 * doesn't support it).
379 */
380
381 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
382 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
383
384 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
385 aborted ? "aborted" : "completed",
386 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
387 IWL_DEBUG_SCAN(mvm,
388 "Last line %d, Last iteration %d, Time after last iteration %d\n",
389 scan_notif->last_schedule_line,
390 scan_notif->last_schedule_iteration,
391 __le32_to_cpu(scan_notif->time_after_last_iter));
392
393 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
394 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
395 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
396 aborted ? "aborted" : "completed",
397 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
398
399 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
400 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
401 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
402
403 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
404 aborted ? "aborted" : "completed",
405 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
406 IWL_DEBUG_SCAN(mvm,
407 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
408 scan_notif->last_schedule_line,
409 scan_notif->last_schedule_iteration,
410 __le32_to_cpu(scan_notif->time_after_last_iter));
411
412 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
413 ieee80211_sched_scan_stopped(mvm->hw);
414 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
415 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
416 struct cfg80211_scan_info info = {
417 .aborted = aborted,
418 };
419
420 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
421 aborted ? "aborted" : "completed",
422 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
423
424 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
425 ieee80211_scan_completed(mvm->hw, &info);
426 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
427 cancel_delayed_work(&mvm->scan_timeout_dwork);
428 } else {
429 IWL_ERR(mvm,
430 "got scan complete notification but no scan is running\n");
431 }
432
433 mvm->last_ebs_successful =
434 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
435 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
436 }
437
iwl_ssid_exist(u8 * ssid,u8 ssid_len,struct iwl_ssid_ie * ssid_list)438 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
439 {
440 int i;
441
442 for (i = 0; i < PROBE_OPTION_MAX; i++) {
443 if (!ssid_list[i].len)
444 break;
445 if (ssid_list[i].len == ssid_len &&
446 !memcmp(ssid_list->ssid, ssid, ssid_len))
447 return i;
448 }
449 return -1;
450 }
451
452 /* We insert the SSIDs in an inverted order, because the FW will
453 * invert it back.
454 */
iwl_scan_build_ssids(struct iwl_mvm_scan_params * params,struct iwl_ssid_ie * ssids,u32 * ssid_bitmap)455 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
456 struct iwl_ssid_ie *ssids,
457 u32 *ssid_bitmap)
458 {
459 int i, j;
460 int index;
461
462 /*
463 * copy SSIDs from match list.
464 * iwl_config_sched_scan_profiles() uses the order of these ssids to
465 * config match list.
466 */
467 for (i = 0, j = params->n_match_sets - 1;
468 j >= 0 && i < PROBE_OPTION_MAX;
469 i++, j--) {
470 /* skip empty SSID matchsets */
471 if (!params->match_sets[j].ssid.ssid_len)
472 continue;
473 ssids[i].id = WLAN_EID_SSID;
474 ssids[i].len = params->match_sets[j].ssid.ssid_len;
475 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
476 ssids[i].len);
477 }
478
479 /* add SSIDs from scan SSID list */
480 *ssid_bitmap = 0;
481 for (j = params->n_ssids - 1;
482 j >= 0 && i < PROBE_OPTION_MAX;
483 i++, j--) {
484 index = iwl_ssid_exist(params->ssids[j].ssid,
485 params->ssids[j].ssid_len,
486 ssids);
487 if (index < 0) {
488 ssids[i].id = WLAN_EID_SSID;
489 ssids[i].len = params->ssids[j].ssid_len;
490 memcpy(ssids[i].ssid, params->ssids[j].ssid,
491 ssids[i].len);
492 *ssid_bitmap |= BIT(i);
493 } else {
494 *ssid_bitmap |= BIT(index);
495 }
496 }
497 }
498
499 static int
iwl_mvm_config_sched_scan_profiles(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)500 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
501 struct cfg80211_sched_scan_request *req)
502 {
503 struct iwl_scan_offload_profile *profile;
504 struct iwl_scan_offload_profile_cfg *profile_cfg;
505 struct iwl_scan_offload_blacklist *blacklist;
506 struct iwl_host_cmd cmd = {
507 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
508 .len[1] = sizeof(*profile_cfg),
509 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
510 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
511 };
512 int blacklist_len;
513 int i;
514 int ret;
515
516 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
517 return -EIO;
518
519 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
520 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
521 else
522 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
523
524 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
525 if (!blacklist)
526 return -ENOMEM;
527
528 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
529 if (!profile_cfg) {
530 ret = -ENOMEM;
531 goto free_blacklist;
532 }
533
534 cmd.data[0] = blacklist;
535 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
536 cmd.data[1] = profile_cfg;
537
538 /* No blacklist configuration */
539
540 profile_cfg->num_profiles = req->n_match_sets;
541 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
542 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
543 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
544 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
545 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
546
547 for (i = 0; i < req->n_match_sets; i++) {
548 profile = &profile_cfg->profiles[i];
549 profile->ssid_index = i;
550 /* Support any cipher and auth algorithm */
551 profile->unicast_cipher = 0xff;
552 profile->auth_alg = 0xff;
553 profile->network_type = IWL_NETWORK_TYPE_ANY;
554 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
555 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
556 }
557
558 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
559
560 ret = iwl_mvm_send_cmd(mvm, &cmd);
561 kfree(profile_cfg);
562 free_blacklist:
563 kfree(blacklist);
564
565 return ret;
566 }
567
iwl_mvm_scan_pass_all(struct iwl_mvm * mvm,struct cfg80211_sched_scan_request * req)568 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
569 struct cfg80211_sched_scan_request *req)
570 {
571 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
572 IWL_DEBUG_SCAN(mvm,
573 "Sending scheduled scan with filtering, n_match_sets %d\n",
574 req->n_match_sets);
575 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
576 return false;
577 }
578
579 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
580
581 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
582 return true;
583 }
584
iwl_mvm_lmac_scan_abort(struct iwl_mvm * mvm)585 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
586 {
587 int ret;
588 struct iwl_host_cmd cmd = {
589 .id = SCAN_OFFLOAD_ABORT_CMD,
590 };
591 u32 status;
592
593 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
594 if (ret)
595 return ret;
596
597 if (status != CAN_ABORT_STATUS) {
598 /*
599 * The scan abort will return 1 for success or
600 * 2 for "failure". A failure condition can be
601 * due to simply not being in an active scan which
602 * can occur if we send the scan abort before the
603 * microcode has notified us that a scan is completed.
604 */
605 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
606 ret = -ENOENT;
607 }
608
609 return ret;
610 }
611
iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm * mvm,struct iwl_scan_req_tx_cmd * tx_cmd,bool no_cck)612 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
613 struct iwl_scan_req_tx_cmd *tx_cmd,
614 bool no_cck)
615 {
616 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
617 TX_CMD_FLG_BT_DIS);
618 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
619 NL80211_BAND_2GHZ,
620 no_cck);
621 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
622
623 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
624 TX_CMD_FLG_BT_DIS);
625 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
626 NL80211_BAND_5GHZ,
627 no_cck);
628 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
629 }
630
631 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)632 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
633 struct ieee80211_channel **channels,
634 int n_channels, u32 ssid_bitmap,
635 struct iwl_scan_req_lmac *cmd)
636 {
637 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
638 int i;
639
640 for (i = 0; i < n_channels; i++) {
641 channel_cfg[i].channel_num =
642 cpu_to_le16(channels[i]->hw_value);
643 channel_cfg[i].iter_count = cpu_to_le16(1);
644 channel_cfg[i].iter_interval = 0;
645 channel_cfg[i].flags =
646 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
647 ssid_bitmap);
648 }
649 }
650
iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm * mvm,const u8 * ies,size_t len,u8 * const pos)651 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
652 size_t len, u8 *const pos)
653 {
654 static const u8 before_ds_params[] = {
655 WLAN_EID_SSID,
656 WLAN_EID_SUPP_RATES,
657 WLAN_EID_REQUEST,
658 WLAN_EID_EXT_SUPP_RATES,
659 };
660 size_t offs;
661 u8 *newpos = pos;
662
663 if (!iwl_mvm_rrm_scan_needed(mvm)) {
664 memcpy(newpos, ies, len);
665 return newpos + len;
666 }
667
668 offs = ieee80211_ie_split(ies, len,
669 before_ds_params,
670 ARRAY_SIZE(before_ds_params),
671 0);
672
673 memcpy(newpos, ies, offs);
674 newpos += offs;
675
676 /* Add a placeholder for DS Parameter Set element */
677 *newpos++ = WLAN_EID_DS_PARAMS;
678 *newpos++ = 1;
679 *newpos++ = 0;
680
681 memcpy(newpos, ies + offs, len - offs);
682 newpos += len - offs;
683
684 return newpos;
685 }
686
687 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)688 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
689 struct ieee80211_scan_ies *ies,
690 struct iwl_mvm_scan_params *params)
691 {
692 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
693 u8 *pos, *newpos;
694 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
695 params->mac_addr : NULL;
696
697 /*
698 * Unfortunately, right now the offload scan doesn't support randomising
699 * within the firmware, so until the firmware API is ready we implement
700 * it in the driver. This means that the scan iterations won't really be
701 * random, only when it's restarted, but at least that helps a bit.
702 */
703 if (mac_addr)
704 get_random_mask_addr(frame->sa, mac_addr,
705 params->mac_addr_mask);
706 else
707 memcpy(frame->sa, vif->addr, ETH_ALEN);
708
709 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
710 eth_broadcast_addr(frame->da);
711 eth_broadcast_addr(frame->bssid);
712 frame->seq_ctrl = 0;
713
714 pos = frame->u.probe_req.variable;
715 *pos++ = WLAN_EID_SSID;
716 *pos++ = 0;
717
718 params->preq.mac_header.offset = 0;
719 params->preq.mac_header.len = cpu_to_le16(24 + 2);
720
721 /* Insert ds parameter set element on 2.4 GHz band */
722 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
723 ies->ies[NL80211_BAND_2GHZ],
724 ies->len[NL80211_BAND_2GHZ],
725 pos);
726 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
727 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
728 pos = newpos;
729
730 memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
731 ies->len[NL80211_BAND_5GHZ]);
732 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
733 params->preq.band_data[1].len =
734 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
735 pos += ies->len[NL80211_BAND_5GHZ];
736
737 memcpy(pos, ies->common_ies, ies->common_ie_len);
738 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
739 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
740 }
741
iwl_mvm_scan_lmac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_lmac * cmd,struct iwl_mvm_scan_params * params)742 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
743 struct iwl_scan_req_lmac *cmd,
744 struct iwl_mvm_scan_params *params)
745 {
746 cmd->active_dwell = scan_timing[params->type].dwell_active;
747 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
748 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
749 cmd->extended_dwell = scan_timing[params->type].dwell_extended;
750 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
751 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
752 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
753 }
754
iwl_mvm_scan_fits(struct iwl_mvm * mvm,int n_ssids,struct ieee80211_scan_ies * ies,int n_channels)755 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
756 struct ieee80211_scan_ies *ies,
757 int n_channels)
758 {
759 return ((n_ssids <= PROBE_OPTION_MAX) &&
760 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
761 (ies->common_ie_len +
762 ies->len[NL80211_BAND_2GHZ] +
763 ies->len[NL80211_BAND_5GHZ] <=
764 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
765 }
766
iwl_mvm_scan_use_ebs(struct iwl_mvm * mvm,struct ieee80211_vif * vif)767 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
768 struct ieee80211_vif *vif)
769 {
770 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
771
772 /* We can only use EBS if:
773 * 1. the feature is supported;
774 * 2. the last EBS was successful;
775 * 3. if only single scan, the single scan EBS API is supported;
776 * 4. it's not a p2p find operation.
777 */
778 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
779 mvm->last_ebs_successful &&
780 vif->type != NL80211_IFTYPE_P2P_DEVICE);
781 }
782
iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params * params)783 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
784 {
785 return params->n_scan_plans == 1 &&
786 params->scan_plans[0].iterations == 1;
787 }
788
iwl_mvm_scan_lmac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)789 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
790 struct iwl_mvm_scan_params *params,
791 struct ieee80211_vif *vif)
792 {
793 int flags = 0;
794
795 if (params->n_ssids == 0)
796 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
797
798 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
799 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
800
801 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
802 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
803
804 if (iwl_mvm_rrm_scan_needed(mvm))
805 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
806
807 if (params->pass_all)
808 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
809 else
810 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
811
812 #ifdef CONFIG_IWLWIFI_DEBUGFS
813 if (mvm->scan_iter_notif_enabled)
814 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
815 #endif
816
817 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
818 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
819
820 if (iwl_mvm_is_regular_scan(params) &&
821 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
822 params->type != IWL_SCAN_TYPE_FRAGMENTED)
823 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
824
825 return flags;
826 }
827
iwl_mvm_scan_lmac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params)828 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
829 struct iwl_mvm_scan_params *params)
830 {
831 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
832 struct iwl_scan_probe_req *preq =
833 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
834 mvm->fw->ucode_capa.n_scan_channels);
835 u32 ssid_bitmap = 0;
836 int i;
837
838 lockdep_assert_held(&mvm->mutex);
839
840 memset(cmd, 0, ksize(cmd));
841
842 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
843 return -EINVAL;
844
845 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
846
847 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
848 cmd->iter_num = cpu_to_le32(1);
849 cmd->n_channels = (u8)params->n_channels;
850
851 cmd->delay = cpu_to_le32(params->delay);
852
853 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
854 vif));
855
856 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
857 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
858 MAC_FILTER_IN_BEACON);
859 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
860 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
861
862 /* this API uses bits 1-20 instead of 0-19 */
863 ssid_bitmap <<= 1;
864
865 for (i = 0; i < params->n_scan_plans; i++) {
866 struct cfg80211_sched_scan_plan *scan_plan =
867 ¶ms->scan_plans[i];
868
869 cmd->schedule[i].delay =
870 cpu_to_le16(scan_plan->interval);
871 cmd->schedule[i].iterations = scan_plan->iterations;
872 cmd->schedule[i].full_scan_mul = 1;
873 }
874
875 /*
876 * If the number of iterations of the last scan plan is set to
877 * zero, it should run infinitely. However, this is not always the case.
878 * For example, when regular scan is requested the driver sets one scan
879 * plan with one iteration.
880 */
881 if (!cmd->schedule[i - 1].iterations)
882 cmd->schedule[i - 1].iterations = 0xff;
883
884 if (iwl_mvm_scan_use_ebs(mvm, vif)) {
885 cmd->channel_opt[0].flags =
886 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
887 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
888 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
889 cmd->channel_opt[0].non_ebs_ratio =
890 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
891 cmd->channel_opt[1].flags =
892 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
893 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
894 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
895 cmd->channel_opt[1].non_ebs_ratio =
896 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
897 }
898
899 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
900 params->n_channels, ssid_bitmap, cmd);
901
902 *preq = params->preq;
903
904 return 0;
905 }
906
rate_to_scan_rate_flag(unsigned int rate)907 static int rate_to_scan_rate_flag(unsigned int rate)
908 {
909 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
910 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
911 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
912 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
913 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
914 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
915 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
916 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
917 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
918 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
919 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
920 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
921 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
922 };
923
924 return rate_to_scan_rate[rate];
925 }
926
iwl_mvm_scan_config_rates(struct iwl_mvm * mvm)927 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
928 {
929 struct ieee80211_supported_band *band;
930 unsigned int rates = 0;
931 int i;
932
933 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
934 for (i = 0; i < band->n_bitrates; i++)
935 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
936 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
937 for (i = 0; i < band->n_bitrates; i++)
938 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
939
940 /* Set both basic rates and supported rates */
941 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
942
943 return cpu_to_le32(rates);
944 }
945
iwl_mvm_config_scan(struct iwl_mvm * mvm)946 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
947 {
948 struct iwl_scan_config *scan_config;
949 struct ieee80211_supported_band *band;
950 int num_channels =
951 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
952 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
953 int ret, i, j = 0, cmd_size;
954 struct iwl_host_cmd cmd = {
955 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
956 };
957 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
958
959 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
960 return -ENOBUFS;
961
962 if (type == mvm->scan_type) {
963 IWL_DEBUG_SCAN(mvm,
964 "Ignoring UMAC scan config of the same type\n");
965 return 0;
966 }
967
968 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
969
970 scan_config = kzalloc(cmd_size, GFP_KERNEL);
971 if (!scan_config)
972 return -ENOMEM;
973
974 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
975 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
976 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
977 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
978 SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
979 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
980 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
981 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
982 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
983 SCAN_CONFIG_N_CHANNELS(num_channels) |
984 (type == IWL_SCAN_TYPE_FRAGMENTED ?
985 SCAN_CONFIG_FLAG_SET_FRAGMENTED :
986 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
987 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
988 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
989 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
990 scan_config->out_of_channel_time =
991 cpu_to_le32(scan_timing[type].max_out_time);
992 scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
993 scan_config->dwell_active = scan_timing[type].dwell_active;
994 scan_config->dwell_passive = scan_timing[type].dwell_passive;
995 scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
996 scan_config->dwell_extended = scan_timing[type].dwell_extended;
997
998 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
999
1000 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1001 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1002 IWL_CHANNEL_FLAG_ACCURATE_EBS |
1003 IWL_CHANNEL_FLAG_EBS_ADD |
1004 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1005
1006 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1007 for (i = 0; i < band->n_channels; i++, j++)
1008 scan_config->channel_array[j] = band->channels[i].hw_value;
1009 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1010 for (i = 0; i < band->n_channels; i++, j++)
1011 scan_config->channel_array[j] = band->channels[i].hw_value;
1012
1013 cmd.data[0] = scan_config;
1014 cmd.len[0] = cmd_size;
1015 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1016
1017 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1018
1019 ret = iwl_mvm_send_cmd(mvm, &cmd);
1020 if (!ret)
1021 mvm->scan_type = type;
1022
1023 kfree(scan_config);
1024 return ret;
1025 }
1026
iwl_mvm_scan_uid_by_status(struct iwl_mvm * mvm,int status)1027 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1028 {
1029 int i;
1030
1031 for (i = 0; i < mvm->max_scans; i++)
1032 if (mvm->scan_uid_status[i] == status)
1033 return i;
1034
1035 return -ENOENT;
1036 }
1037
iwl_mvm_scan_umac_dwell(struct iwl_mvm * mvm,struct iwl_scan_req_umac * cmd,struct iwl_mvm_scan_params * params)1038 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1039 struct iwl_scan_req_umac *cmd,
1040 struct iwl_mvm_scan_params *params)
1041 {
1042 if (params->measurement_dwell) {
1043 cmd->active_dwell = params->measurement_dwell;
1044 cmd->passive_dwell = params->measurement_dwell;
1045 cmd->extended_dwell = params->measurement_dwell;
1046 } else {
1047 cmd->active_dwell = scan_timing[params->type].dwell_active;
1048 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
1049 cmd->extended_dwell = scan_timing[params->type].dwell_extended;
1050 }
1051 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
1052 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
1053 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
1054 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1055
1056 if (iwl_mvm_is_regular_scan(params))
1057 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1058 else
1059 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1060 }
1061
1062 static void
iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm * mvm,struct ieee80211_channel ** channels,int n_channels,u32 ssid_bitmap,struct iwl_scan_req_umac * cmd)1063 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1064 struct ieee80211_channel **channels,
1065 int n_channels, u32 ssid_bitmap,
1066 struct iwl_scan_req_umac *cmd)
1067 {
1068 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1069 int i;
1070
1071 for (i = 0; i < n_channels; i++) {
1072 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1073 channel_cfg[i].channel_num = channels[i]->hw_value;
1074 channel_cfg[i].iter_count = 1;
1075 channel_cfg[i].iter_interval = 0;
1076 }
1077 }
1078
iwl_mvm_scan_umac_flags(struct iwl_mvm * mvm,struct iwl_mvm_scan_params * params,struct ieee80211_vif * vif)1079 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1080 struct iwl_mvm_scan_params *params,
1081 struct ieee80211_vif *vif)
1082 {
1083 u16 flags = 0;
1084
1085 if (params->n_ssids == 0)
1086 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1087
1088 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1089 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1090
1091 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1092 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1093
1094 if (iwl_mvm_rrm_scan_needed(mvm))
1095 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1096
1097 if (params->pass_all)
1098 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1099 else
1100 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1101
1102 if (!iwl_mvm_is_regular_scan(params))
1103 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1104
1105 if (params->measurement_dwell)
1106 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1107
1108 #ifdef CONFIG_IWLWIFI_DEBUGFS
1109 if (mvm->scan_iter_notif_enabled)
1110 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1111 #endif
1112
1113 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1114 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1115
1116 if (iwl_mvm_is_regular_scan(params) &&
1117 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1118 params->type != IWL_SCAN_TYPE_FRAGMENTED)
1119 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1120
1121 return flags;
1122 }
1123
iwl_mvm_scan_umac(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct iwl_mvm_scan_params * params,int type)1124 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1125 struct iwl_mvm_scan_params *params,
1126 int type)
1127 {
1128 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1129 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1130 sizeof(struct iwl_scan_channel_cfg_umac) *
1131 mvm->fw->ucode_capa.n_scan_channels;
1132 int uid, i;
1133 u32 ssid_bitmap = 0;
1134 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
1135
1136 lockdep_assert_held(&mvm->mutex);
1137
1138 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1139 return -EINVAL;
1140
1141 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1142 if (uid < 0)
1143 return uid;
1144
1145 memset(cmd, 0, ksize(cmd));
1146
1147 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1148
1149 mvm->scan_uid_status[uid] = type;
1150
1151 cmd->uid = cpu_to_le32(uid);
1152 cmd->general_flags = cpu_to_le16(iwl_mvm_scan_umac_flags(mvm, params,
1153 vif));
1154 cmd->scan_start_mac_id = scan_vif->id;
1155
1156 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1157 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1158
1159 if (iwl_mvm_scan_use_ebs(mvm, vif))
1160 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1161 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1162 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1163
1164 cmd->n_channels = params->n_channels;
1165
1166 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1167
1168 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1169 params->n_channels, ssid_bitmap, cmd);
1170
1171 for (i = 0; i < params->n_scan_plans; i++) {
1172 struct cfg80211_sched_scan_plan *scan_plan =
1173 ¶ms->scan_plans[i];
1174
1175 sec_part->schedule[i].iter_count = scan_plan->iterations;
1176 sec_part->schedule[i].interval =
1177 cpu_to_le16(scan_plan->interval);
1178 }
1179
1180 /*
1181 * If the number of iterations of the last scan plan is set to
1182 * zero, it should run infinitely. However, this is not always the case.
1183 * For example, when regular scan is requested the driver sets one scan
1184 * plan with one iteration.
1185 */
1186 if (!sec_part->schedule[i - 1].iter_count)
1187 sec_part->schedule[i - 1].iter_count = 0xff;
1188
1189 sec_part->delay = cpu_to_le16(params->delay);
1190 sec_part->preq = params->preq;
1191
1192 return 0;
1193 }
1194
iwl_mvm_num_scans(struct iwl_mvm * mvm)1195 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1196 {
1197 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1198 }
1199
iwl_mvm_check_running_scans(struct iwl_mvm * mvm,int type)1200 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1201 {
1202 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1203 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1204
1205 /* This looks a bit arbitrary, but the idea is that if we run
1206 * out of possible simultaneous scans and the userspace is
1207 * trying to run a scan type that is already running, we
1208 * return -EBUSY. But if the userspace wants to start a
1209 * different type of scan, we stop the opposite type to make
1210 * space for the new request. The reason is backwards
1211 * compatibility with old wpa_supplicant that wouldn't stop a
1212 * scheduled scan before starting a normal scan.
1213 */
1214
1215 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1216 return 0;
1217
1218 /* Use a switch, even though this is a bitmask, so that more
1219 * than one bits set will fall in default and we will warn.
1220 */
1221 switch (type) {
1222 case IWL_MVM_SCAN_REGULAR:
1223 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1224 return -EBUSY;
1225 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1226 case IWL_MVM_SCAN_SCHED:
1227 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1228 return -EBUSY;
1229 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1230 case IWL_MVM_SCAN_NETDETECT:
1231 /* For non-unified images, there's no need to stop
1232 * anything for net-detect since the firmware is
1233 * restarted anyway. This way, any sched scans that
1234 * were running will be restarted when we resume.
1235 */
1236 if (!unified_image)
1237 return 0;
1238
1239 /* If this is a unified image and we ran out of scans,
1240 * we need to stop something. Prefer stopping regular
1241 * scans, because the results are useless at this
1242 * point, and we should be able to keep running
1243 * another scheduled scan while suspended.
1244 */
1245 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1246 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
1247 true);
1248 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1249 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
1250 true);
1251
1252 /* fall through, something is wrong if no scan was
1253 * running but we ran out of scans.
1254 */
1255 default:
1256 WARN_ON(1);
1257 break;
1258 }
1259
1260 return -EIO;
1261 }
1262
1263 #define SCAN_TIMEOUT 20000
1264
iwl_mvm_scan_timeout_wk(struct work_struct * work)1265 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
1266 {
1267 struct delayed_work *delayed_work = to_delayed_work(work);
1268 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1269 scan_timeout_dwork);
1270
1271 IWL_ERR(mvm, "regular scan timed out\n");
1272
1273 iwl_force_nmi(mvm->trans);
1274 }
1275
iwl_mvm_reg_scan_start(struct iwl_mvm * mvm,struct ieee80211_vif * vif,struct cfg80211_scan_request * req,struct ieee80211_scan_ies * ies)1276 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1277 struct cfg80211_scan_request *req,
1278 struct ieee80211_scan_ies *ies)
1279 {
1280 struct iwl_host_cmd hcmd = {
1281 .len = { iwl_mvm_scan_size(mvm), },
1282 .data = { mvm->scan_cmd, },
1283 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1284 };
1285 struct iwl_mvm_scan_params params = {};
1286 int ret;
1287 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1288
1289 lockdep_assert_held(&mvm->mutex);
1290
1291 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1292 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1293 return -EBUSY;
1294 }
1295
1296 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1297 if (ret)
1298 return ret;
1299
1300 /* we should have failed registration if scan_cmd was NULL */
1301 if (WARN_ON(!mvm->scan_cmd))
1302 return -ENOMEM;
1303
1304 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1305 return -ENOBUFS;
1306
1307 params.n_ssids = req->n_ssids;
1308 params.flags = req->flags;
1309 params.n_channels = req->n_channels;
1310 params.delay = 0;
1311 params.ssids = req->ssids;
1312 params.channels = req->channels;
1313 params.mac_addr = req->mac_addr;
1314 params.mac_addr_mask = req->mac_addr_mask;
1315 params.no_cck = req->no_cck;
1316 params.pass_all = true;
1317 params.n_match_sets = 0;
1318 params.match_sets = NULL;
1319
1320 params.scan_plans = &scan_plan;
1321 params.n_scan_plans = 1;
1322
1323 params.type =
1324 iwl_mvm_get_scan_type(mvm,
1325 vif->type == NL80211_IFTYPE_P2P_DEVICE);
1326
1327 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms);
1328 if (ret < 0)
1329 return ret;
1330
1331 params.measurement_dwell = ret;
1332
1333 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms);
1334
1335 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1336 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1337 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms,
1338 IWL_MVM_SCAN_REGULAR);
1339 } else {
1340 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1341 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms);
1342 }
1343
1344 if (ret)
1345 return ret;
1346
1347 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1348 if (ret) {
1349 /* If the scan failed, it usually means that the FW was unable
1350 * to allocate the time events. Warn on it, but maybe we
1351 * should try to send the command again with different params.
1352 */
1353 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1354 return ret;
1355 }
1356
1357 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1358 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1359 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
1360 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1361
1362 queue_delayed_work(system_wq, &mvm->scan_timeout_dwork,
1363 msecs_to_jiffies(SCAN_TIMEOUT));
1364
1365 return 0;
1366 }
1367
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)1368 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1369 struct ieee80211_vif *vif,
1370 struct cfg80211_sched_scan_request *req,
1371 struct ieee80211_scan_ies *ies,
1372 int type)
1373 {
1374 struct iwl_host_cmd hcmd = {
1375 .len = { iwl_mvm_scan_size(mvm), },
1376 .data = { mvm->scan_cmd, },
1377 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1378 };
1379 struct iwl_mvm_scan_params params = {};
1380 int ret;
1381
1382 lockdep_assert_held(&mvm->mutex);
1383
1384 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1385 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1386 return -EBUSY;
1387 }
1388
1389 ret = iwl_mvm_check_running_scans(mvm, type);
1390 if (ret)
1391 return ret;
1392
1393 /* we should have failed registration if scan_cmd was NULL */
1394 if (WARN_ON(!mvm->scan_cmd))
1395 return -ENOMEM;
1396
1397 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1398 return -ENOBUFS;
1399
1400 params.n_ssids = req->n_ssids;
1401 params.flags = req->flags;
1402 params.n_channels = req->n_channels;
1403 params.ssids = req->ssids;
1404 params.channels = req->channels;
1405 params.mac_addr = req->mac_addr;
1406 params.mac_addr_mask = req->mac_addr_mask;
1407 params.no_cck = false;
1408 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1409 params.n_match_sets = req->n_match_sets;
1410 params.match_sets = req->match_sets;
1411 if (!req->n_scan_plans)
1412 return -EINVAL;
1413
1414 params.n_scan_plans = req->n_scan_plans;
1415 params.scan_plans = req->scan_plans;
1416
1417 params.type =
1418 iwl_mvm_get_scan_type(mvm,
1419 vif->type == NL80211_IFTYPE_P2P_DEVICE);
1420
1421 /* In theory, LMAC scans can handle a 32-bit delay, but since
1422 * waiting for over 18 hours to start the scan is a bit silly
1423 * and to keep it aligned with UMAC scans (which only support
1424 * 16-bit delays), trim it down to 16-bits.
1425 */
1426 if (req->delay > U16_MAX) {
1427 IWL_DEBUG_SCAN(mvm,
1428 "delay value is > 16-bits, set to max possible\n");
1429 params.delay = U16_MAX;
1430 } else {
1431 params.delay = req->delay;
1432 }
1433
1434 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1435 if (ret)
1436 return ret;
1437
1438 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms);
1439
1440 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1441 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1442 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type);
1443 } else {
1444 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1445 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms);
1446 }
1447
1448 if (ret)
1449 return ret;
1450
1451 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1452 if (!ret) {
1453 IWL_DEBUG_SCAN(mvm,
1454 "Sched scan request was sent successfully\n");
1455 mvm->scan_status |= type;
1456 } else {
1457 /* If the scan failed, it usually means that the FW was unable
1458 * to allocate the time events. Warn on it, but maybe we
1459 * should try to send the command again with different params.
1460 */
1461 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1462 }
1463
1464 return ret;
1465 }
1466
iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1467 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1468 struct iwl_rx_cmd_buffer *rxb)
1469 {
1470 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1471 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1472 u32 uid = __le32_to_cpu(notif->uid);
1473 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1474
1475 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1476 return;
1477
1478 /* if the scan is already stopping, we don't need to notify mac80211 */
1479 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1480 struct cfg80211_scan_info info = {
1481 .aborted = aborted,
1482 .scan_start_tsf = mvm->scan_start,
1483 };
1484
1485 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN);
1486 ieee80211_scan_completed(mvm->hw, &info);
1487 mvm->scan_vif = NULL;
1488 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1489 cancel_delayed_work(&mvm->scan_timeout_dwork);
1490 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1491 ieee80211_sched_scan_stopped(mvm->hw);
1492 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1493 }
1494
1495 mvm->scan_status &= ~mvm->scan_uid_status[uid];
1496 IWL_DEBUG_SCAN(mvm,
1497 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1498 uid, mvm->scan_uid_status[uid],
1499 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1500 "completed" : "aborted",
1501 iwl_mvm_ebs_status_str(notif->ebs_status));
1502 IWL_DEBUG_SCAN(mvm,
1503 "Last line %d, Last iteration %d, Time from last iteration %d\n",
1504 notif->last_schedule, notif->last_iter,
1505 __le32_to_cpu(notif->time_from_last_iter));
1506
1507 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1508 notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1509 mvm->last_ebs_successful = false;
1510
1511 mvm->scan_uid_status[uid] = 0;
1512 }
1513
iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm * mvm,struct iwl_rx_cmd_buffer * rxb)1514 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1515 struct iwl_rx_cmd_buffer *rxb)
1516 {
1517 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1518 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1519 u8 buf[256];
1520
1521 mvm->scan_start = le64_to_cpu(notif->start_tsf);
1522
1523 IWL_DEBUG_SCAN(mvm,
1524 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1525 notif->status, notif->scanned_channels,
1526 iwl_mvm_dump_channel_list(notif->results,
1527 notif->scanned_channels, buf,
1528 sizeof(buf)));
1529
1530 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1531 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1532 ieee80211_sched_scan_results(mvm->hw);
1533 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1534 }
1535
1536 IWL_DEBUG_SCAN(mvm,
1537 "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
1538 mvm->scan_start);
1539 }
1540
iwl_mvm_umac_scan_abort(struct iwl_mvm * mvm,int type)1541 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1542 {
1543 struct iwl_umac_scan_abort cmd = {};
1544 int uid, ret;
1545
1546 lockdep_assert_held(&mvm->mutex);
1547
1548 /* We should always get a valid index here, because we already
1549 * checked that this type of scan was running in the generic
1550 * code.
1551 */
1552 uid = iwl_mvm_scan_uid_by_status(mvm, type);
1553 if (WARN_ON_ONCE(uid < 0))
1554 return uid;
1555
1556 cmd.uid = cpu_to_le32(uid);
1557
1558 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1559
1560 ret = iwl_mvm_send_cmd_pdu(mvm,
1561 iwl_cmd_id(SCAN_ABORT_UMAC,
1562 IWL_ALWAYS_LONG_GROUP, 0),
1563 0, sizeof(cmd), &cmd);
1564 if (!ret)
1565 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1566
1567 return ret;
1568 }
1569
iwl_mvm_scan_stop_wait(struct iwl_mvm * mvm,int type)1570 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1571 {
1572 struct iwl_notification_wait wait_scan_done;
1573 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1574 SCAN_OFFLOAD_COMPLETE, };
1575 int ret;
1576
1577 lockdep_assert_held(&mvm->mutex);
1578
1579 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1580 scan_done_notif,
1581 ARRAY_SIZE(scan_done_notif),
1582 NULL, NULL);
1583
1584 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1585
1586 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1587 ret = iwl_mvm_umac_scan_abort(mvm, type);
1588 else
1589 ret = iwl_mvm_lmac_scan_abort(mvm);
1590
1591 if (ret) {
1592 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1593 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1594 return ret;
1595 }
1596
1597 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1598
1599 return ret;
1600 }
1601
iwl_mvm_scan_size(struct iwl_mvm * mvm)1602 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1603 {
1604 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1605 return sizeof(struct iwl_scan_req_umac) +
1606 sizeof(struct iwl_scan_channel_cfg_umac) *
1607 mvm->fw->ucode_capa.n_scan_channels +
1608 sizeof(struct iwl_scan_req_umac_tail);
1609
1610 return sizeof(struct iwl_scan_req_lmac) +
1611 sizeof(struct iwl_scan_channel_cfg_lmac) *
1612 mvm->fw->ucode_capa.n_scan_channels +
1613 sizeof(struct iwl_scan_probe_req);
1614 }
1615
1616 /*
1617 * This function is used in nic restart flow, to inform mac80211 about scans
1618 * that was aborted by restart flow or by an assert.
1619 */
iwl_mvm_report_scan_aborted(struct iwl_mvm * mvm)1620 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1621 {
1622 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1623 int uid, i;
1624
1625 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1626 if (uid >= 0) {
1627 struct cfg80211_scan_info info = {
1628 .aborted = true,
1629 };
1630
1631 ieee80211_scan_completed(mvm->hw, &info);
1632 mvm->scan_uid_status[uid] = 0;
1633 }
1634 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1635 if (uid >= 0 && !mvm->restart_fw) {
1636 ieee80211_sched_scan_stopped(mvm->hw);
1637 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1638 mvm->scan_uid_status[uid] = 0;
1639 }
1640
1641 /* We shouldn't have any UIDs still set. Loop over all the
1642 * UIDs to make sure there's nothing left there and warn if
1643 * any is found.
1644 */
1645 for (i = 0; i < mvm->max_scans; i++) {
1646 if (WARN_ONCE(mvm->scan_uid_status[i],
1647 "UMAC scan UID %d status was not cleaned\n",
1648 i))
1649 mvm->scan_uid_status[i] = 0;
1650 }
1651 } else {
1652 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
1653 struct cfg80211_scan_info info = {
1654 .aborted = true,
1655 };
1656
1657 ieee80211_scan_completed(mvm->hw, &info);
1658 }
1659
1660 /* Sched scan will be restarted by mac80211 in
1661 * restart_hw, so do not report if FW is about to be
1662 * restarted.
1663 */
1664 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
1665 !mvm->restart_fw) {
1666 ieee80211_sched_scan_stopped(mvm->hw);
1667 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1668 }
1669 }
1670 }
1671
iwl_mvm_scan_stop(struct iwl_mvm * mvm,int type,bool notify)1672 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1673 {
1674 int ret;
1675
1676 if (!(mvm->scan_status & type))
1677 return 0;
1678
1679 if (iwl_mvm_is_radio_killed(mvm)) {
1680 ret = 0;
1681 goto out;
1682 }
1683
1684 ret = iwl_mvm_scan_stop_wait(mvm, type);
1685 if (!ret)
1686 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1687 out:
1688 /* Clear the scan status so the next scan requests will
1689 * succeed and mark the scan as stopping, so that the Rx
1690 * handler doesn't do anything, as the scan was stopped from
1691 * above.
1692 */
1693 mvm->scan_status &= ~type;
1694
1695 if (type == IWL_MVM_SCAN_REGULAR) {
1696 /* Since the rx handler won't do anything now, we have
1697 * to release the scan reference here.
1698 */
1699 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1700 cancel_delayed_work(&mvm->scan_timeout_dwork);
1701 if (notify) {
1702 struct cfg80211_scan_info info = {
1703 .aborted = true,
1704 };
1705
1706 ieee80211_scan_completed(mvm->hw, &info);
1707 }
1708 } else if (notify) {
1709 ieee80211_sched_scan_stopped(mvm->hw);
1710 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1711 }
1712
1713 return ret;
1714 }
1715