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iwlwifi: mvm: rename umac scan stop function
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
1 /******************************************************************************
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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.
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8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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64 *****************************************************************************/
65
66 #include <linux/etherdevice.h>
67 #include <net/mac80211.h>
68
69 #include "mvm.h"
70 #include "fw-api-scan.h"
71
72 #define IWL_DENSE_EBS_SCAN_RATIO 5
73 #define IWL_SPARSE_EBS_SCAN_RATIO 1
74
75 struct iwl_mvm_scan_params {
76 u32 max_out_time;
77 u32 suspend_time;
78 bool passive_fragmented;
79 u32 n_channels;
80 u16 delay;
81 int n_ssids;
82 struct cfg80211_ssid *ssids;
83 struct ieee80211_channel **channels;
84 u16 interval; /* interval between scans (in secs) */
85 u32 flags;
86 u8 *mac_addr;
87 u8 *mac_addr_mask;
88 bool no_cck;
89 bool pass_all;
90 int n_match_sets;
91 struct iwl_scan_probe_req preq;
92 struct cfg80211_match_set *match_sets;
93 struct _dwell {
94 u16 passive;
95 u16 active;
96 u16 fragmented;
97 } dwell[IEEE80211_NUM_BANDS];
98 struct {
99 u8 iterations;
100 u8 full_scan_mul; /* not used for UMAC */
101 } schedule[2];
102 };
103
104 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
105 {
106 if (mvm->scan_rx_ant != ANT_NONE)
107 return mvm->scan_rx_ant;
108 return iwl_mvm_get_valid_rx_ant(mvm);
109 }
110
111 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
112 {
113 u16 rx_chain;
114 u8 rx_ant;
115
116 rx_ant = iwl_mvm_scan_rx_ant(mvm);
117 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
118 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
119 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
120 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
121 return cpu_to_le16(rx_chain);
122 }
123
124 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
125 {
126 if (band == IEEE80211_BAND_2GHZ)
127 return cpu_to_le32(PHY_BAND_24);
128 else
129 return cpu_to_le32(PHY_BAND_5);
130 }
131
132 static inline __le32
133 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
134 bool no_cck)
135 {
136 u32 tx_ant;
137
138 mvm->scan_last_antenna_idx =
139 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
140 mvm->scan_last_antenna_idx);
141 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
142
143 if (band == IEEE80211_BAND_2GHZ && !no_cck)
144 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
145 tx_ant);
146 else
147 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
148 }
149
150 /*
151 * If req->n_ssids > 0, it means we should do an active scan.
152 * In case of active scan w/o directed scan, we receive a zero-length SSID
153 * just to notify that this scan is active and not passive.
154 * In order to notify the FW of the number of SSIDs we wish to scan (including
155 * the zero-length one), we need to set the corresponding bits in chan->type,
156 * one for each SSID, and set the active bit (first). If the first SSID is
157 * already included in the probe template, so we need to set only
158 * req->n_ssids - 1 bits in addition to the first bit.
159 */
160 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
161 enum ieee80211_band band, int n_ssids)
162 {
163 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
164 return 10;
165 if (band == IEEE80211_BAND_2GHZ)
166 return 20 + 3 * (n_ssids + 1);
167 return 10 + 2 * (n_ssids + 1);
168 }
169
170 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
171 enum ieee80211_band band)
172 {
173 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
174 return 110;
175 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
176 }
177
178 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
179 struct ieee80211_vif *vif)
180 {
181 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
182 int *global_cnt = data;
183
184 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
185 mvmvif->phy_ctxt->id < MAX_PHYS)
186 *global_cnt += 1;
187 }
188
189 static void iwl_mvm_scan_calc_dwell(struct iwl_mvm *mvm,
190 struct ieee80211_vif *vif,
191 struct iwl_mvm_scan_params *params)
192 {
193 int global_cnt = 0;
194 enum ieee80211_band band;
195 u8 frag_passive_dwell = 0;
196
197 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
198 IEEE80211_IFACE_ITER_NORMAL,
199 iwl_mvm_scan_condition_iterator,
200 &global_cnt);
201 if (!global_cnt)
202 goto not_bound;
203
204 params->suspend_time = 30;
205 params->max_out_time = 120;
206
207 if (iwl_mvm_low_latency(mvm)) {
208 if (mvm->fw->ucode_capa.api[0] &
209 IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
210 params->suspend_time = 105;
211 /*
212 * If there is more than one active interface make
213 * passive scan more fragmented.
214 */
215 frag_passive_dwell = 40;
216 params->max_out_time = frag_passive_dwell;
217 } else {
218 params->suspend_time = 120;
219 params->max_out_time = 120;
220 }
221 }
222
223 if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
224 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
225 /*
226 * P2P device scan should not be fragmented to avoid negative
227 * impact on P2P device discovery. Configure max_out_time to be
228 * equal to dwell time on passive channel. Take a longest
229 * possible value, one that corresponds to 2GHz band
230 */
231 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
232 u32 passive_dwell =
233 iwl_mvm_get_passive_dwell(mvm,
234 IEEE80211_BAND_2GHZ);
235 params->max_out_time = passive_dwell;
236 } else {
237 params->passive_fragmented = true;
238 }
239 }
240
241 if ((params->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
242 (params->max_out_time > 200))
243 params->max_out_time = 200;
244
245 not_bound:
246
247 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
248 if (params->passive_fragmented)
249 params->dwell[band].fragmented = frag_passive_dwell;
250
251 params->dwell[band].passive = iwl_mvm_get_passive_dwell(mvm,
252 band);
253 params->dwell[band].active =
254 iwl_mvm_get_active_dwell(mvm, band, params->n_ssids);
255 }
256
257 IWL_DEBUG_SCAN(mvm,
258 "scan parameters: max_out_time %d, suspend_time %d, passive_fragmented %d\n",
259 params->max_out_time, params->suspend_time,
260 params->passive_fragmented);
261 IWL_DEBUG_SCAN(mvm,
262 "dwell[IEEE80211_BAND_2GHZ]: passive %d, active %d, fragmented %d\n",
263 params->dwell[IEEE80211_BAND_2GHZ].passive,
264 params->dwell[IEEE80211_BAND_2GHZ].active,
265 params->dwell[IEEE80211_BAND_2GHZ].fragmented);
266 IWL_DEBUG_SCAN(mvm,
267 "dwell[IEEE80211_BAND_5GHZ]: passive %d, active %d, fragmented %d\n",
268 params->dwell[IEEE80211_BAND_5GHZ].passive,
269 params->dwell[IEEE80211_BAND_5GHZ].active,
270 params->dwell[IEEE80211_BAND_5GHZ].fragmented);
271 }
272
273 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
274 {
275 /* require rrm scan whenever the fw supports it */
276 return mvm->fw->ucode_capa.capa[0] &
277 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
278 }
279
280 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
281 {
282 int max_probe_len;
283
284 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
285
286 /* we create the 802.11 header and SSID element */
287 max_probe_len -= 24 + 2;
288
289 /* DS parameter set element is added on 2.4GHZ band if required */
290 if (iwl_mvm_rrm_scan_needed(mvm))
291 max_probe_len -= 3;
292
293 return max_probe_len;
294 }
295
296 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
297 {
298 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
299
300 /* TODO: [BUG] This function should return the maximum allowed size of
301 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
302 * in the same command. So the correct implementation of this function
303 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
304 * command has only 512 bytes and it would leave us with about 240
305 * bytes for scan IEs, which is clearly not enough. So meanwhile
306 * we will report an incorrect value. This may result in a failure to
307 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
308 * functions with -ENOBUFS, if a large enough probe will be provided.
309 */
310 return max_ie_len;
311 }
312
313 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
314 int num_res, u8 *buf, size_t buf_size)
315 {
316 int i;
317 u8 *pos = buf, *end = buf + buf_size;
318
319 for (i = 0; pos < end && i < num_res; i++)
320 pos += snprintf(pos, end - pos, " %u", res[i].channel);
321
322 /* terminate the string in case the buffer was too short */
323 *(buf + buf_size - 1) = '\0';
324
325 return buf;
326 }
327
328 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm,
329 struct iwl_rx_cmd_buffer *rxb,
330 struct iwl_device_cmd *cmd)
331 {
332 struct iwl_rx_packet *pkt = rxb_addr(rxb);
333 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
334 u8 buf[256];
335
336 IWL_DEBUG_SCAN(mvm,
337 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
338 notif->status, notif->scanned_channels,
339 iwl_mvm_dump_channel_list(notif->results,
340 notif->scanned_channels, buf,
341 sizeof(buf)));
342 return 0;
343 }
344
345 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
346 struct iwl_rx_cmd_buffer *rxb,
347 struct iwl_device_cmd *cmd)
348 {
349 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
350 ieee80211_sched_scan_results(mvm->hw);
351
352 return 0;
353 }
354
355 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
356 struct iwl_rx_cmd_buffer *rxb,
357 struct iwl_device_cmd *cmd)
358 {
359 struct iwl_rx_packet *pkt = rxb_addr(rxb);
360 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
361 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
362 bool ebs_successful = (scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS);
363
364 /* scan status must be locked for proper checking */
365 lockdep_assert_held(&mvm->mutex);
366
367 /* We first check if we were stopping a scan, in which case we
368 * just clear the stopping flag. Then we check if it was a
369 * firmware initiated stop, in which case we need to inform
370 * mac80211.
371 * Note that we can have a stopping and a running scan
372 * simultaneously, but we can't have two different types of
373 * scans stopping or running at the same time (since LMAC
374 * doesn't support it).
375 */
376
377 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
378 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
379
380 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
381 aborted ? "aborted" : "completed",
382 ebs_successful ? "successful" : "failed");
383
384 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
385 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
386 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
387 aborted ? "aborted" : "completed",
388 ebs_successful ? "successful" : "failed");
389
390 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
391 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
392 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
393
394 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s (FW)\n",
395 aborted ? "aborted" : "completed",
396 ebs_successful ? "successful" : "failed");
397
398 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
399 ieee80211_sched_scan_stopped(mvm->hw);
400 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
401 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
402 aborted ? "aborted" : "completed",
403 ebs_successful ? "successful" : "failed");
404
405 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
406 ieee80211_scan_completed(mvm->hw,
407 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
408 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
409 }
410
411 mvm->last_ebs_successful = ebs_successful;
412
413 return 0;
414 }
415
416 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
417 {
418 int i;
419
420 for (i = 0; i < PROBE_OPTION_MAX; i++) {
421 if (!ssid_list[i].len)
422 break;
423 if (ssid_list[i].len == ssid_len &&
424 !memcmp(ssid_list->ssid, ssid, ssid_len))
425 return i;
426 }
427 return -1;
428 }
429
430 /* We insert the SSIDs in an inverted order, because the FW will
431 * invert it back.
432 */
433 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
434 struct iwl_ssid_ie *ssids,
435 u32 *ssid_bitmap)
436 {
437 int i, j;
438 int index;
439
440 /*
441 * copy SSIDs from match list.
442 * iwl_config_sched_scan_profiles() uses the order of these ssids to
443 * config match list.
444 */
445 for (i = 0, j = params->n_match_sets - 1;
446 j >= 0 && i < PROBE_OPTION_MAX;
447 i++, j--) {
448 /* skip empty SSID matchsets */
449 if (!params->match_sets[j].ssid.ssid_len)
450 continue;
451 ssids[i].id = WLAN_EID_SSID;
452 ssids[i].len = params->match_sets[j].ssid.ssid_len;
453 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
454 ssids[i].len);
455 }
456
457 /* add SSIDs from scan SSID list */
458 *ssid_bitmap = 0;
459 for (j = params->n_ssids - 1;
460 j >= 0 && i < PROBE_OPTION_MAX;
461 i++, j--) {
462 index = iwl_ssid_exist(params->ssids[j].ssid,
463 params->ssids[j].ssid_len,
464 ssids);
465 if (index < 0) {
466 ssids[i].id = WLAN_EID_SSID;
467 ssids[i].len = params->ssids[j].ssid_len;
468 memcpy(ssids[i].ssid, params->ssids[j].ssid,
469 ssids[i].len);
470 *ssid_bitmap |= BIT(i);
471 } else {
472 *ssid_bitmap |= BIT(index);
473 }
474 }
475 }
476
477 static int
478 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
479 struct cfg80211_sched_scan_request *req)
480 {
481 struct iwl_scan_offload_profile *profile;
482 struct iwl_scan_offload_profile_cfg *profile_cfg;
483 struct iwl_scan_offload_blacklist *blacklist;
484 struct iwl_host_cmd cmd = {
485 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
486 .len[1] = sizeof(*profile_cfg),
487 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
488 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
489 };
490 int blacklist_len;
491 int i;
492 int ret;
493
494 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
495 return -EIO;
496
497 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
498 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
499 else
500 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
501
502 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
503 if (!blacklist)
504 return -ENOMEM;
505
506 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
507 if (!profile_cfg) {
508 ret = -ENOMEM;
509 goto free_blacklist;
510 }
511
512 cmd.data[0] = blacklist;
513 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
514 cmd.data[1] = profile_cfg;
515
516 /* No blacklist configuration */
517
518 profile_cfg->num_profiles = req->n_match_sets;
519 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
520 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
521 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
522 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
523 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
524
525 for (i = 0; i < req->n_match_sets; i++) {
526 profile = &profile_cfg->profiles[i];
527 profile->ssid_index = i;
528 /* Support any cipher and auth algorithm */
529 profile->unicast_cipher = 0xff;
530 profile->auth_alg = 0xff;
531 profile->network_type = IWL_NETWORK_TYPE_ANY;
532 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
533 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
534 }
535
536 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
537
538 ret = iwl_mvm_send_cmd(mvm, &cmd);
539 kfree(profile_cfg);
540 free_blacklist:
541 kfree(blacklist);
542
543 return ret;
544 }
545
546 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
547 struct cfg80211_sched_scan_request *req)
548 {
549 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
550 IWL_DEBUG_SCAN(mvm,
551 "Sending scheduled scan with filtering, n_match_sets %d\n",
552 req->n_match_sets);
553 return false;
554 }
555
556 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
557 return true;
558 }
559
560 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
561 {
562 int ret;
563 struct iwl_host_cmd cmd = {
564 .id = SCAN_OFFLOAD_ABORT_CMD,
565 };
566 u32 status;
567
568 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
569 if (ret)
570 return ret;
571
572 if (status != CAN_ABORT_STATUS) {
573 /*
574 * The scan abort will return 1 for success or
575 * 2 for "failure". A failure condition can be
576 * due to simply not being in an active scan which
577 * can occur if we send the scan abort before the
578 * microcode has notified us that a scan is completed.
579 */
580 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
581 ret = -ENOENT;
582 }
583
584 return ret;
585 }
586
587 static int iwl_mvm_lmac_scan_stop(struct iwl_mvm *mvm, int type)
588 {
589 int ret;
590 struct iwl_notification_wait wait_scan_done;
591 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
592 bool sched = type & IWL_MVM_SCAN_SCHED;
593
594 lockdep_assert_held(&mvm->mutex);
595
596 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
597 scan_done_notif,
598 ARRAY_SIZE(scan_done_notif),
599 NULL, NULL);
600
601 ret = iwl_mvm_send_scan_offload_abort(mvm);
602 if (ret) {
603 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
604 sched ? "offloaded " : "", ret);
605 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
606 goto out;
607 }
608
609 IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
610 sched ? "scheduled " : "");
611
612 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
613 out:
614 return ret;
615 }
616
617 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
618 struct iwl_scan_req_tx_cmd *tx_cmd,
619 bool no_cck)
620 {
621 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
622 TX_CMD_FLG_BT_DIS);
623 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
624 IEEE80211_BAND_2GHZ,
625 no_cck);
626 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
627
628 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
629 TX_CMD_FLG_BT_DIS);
630 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
631 IEEE80211_BAND_5GHZ,
632 no_cck);
633 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
634 }
635
636 static void
637 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
638 struct ieee80211_channel **channels,
639 int n_channels, u32 ssid_bitmap,
640 struct iwl_scan_req_lmac *cmd)
641 {
642 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
643 int i;
644
645 for (i = 0; i < n_channels; i++) {
646 channel_cfg[i].channel_num =
647 cpu_to_le16(channels[i]->hw_value);
648 channel_cfg[i].iter_count = cpu_to_le16(1);
649 channel_cfg[i].iter_interval = 0;
650 channel_cfg[i].flags =
651 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
652 ssid_bitmap);
653 }
654 }
655
656 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
657 size_t len, u8 *const pos)
658 {
659 static const u8 before_ds_params[] = {
660 WLAN_EID_SSID,
661 WLAN_EID_SUPP_RATES,
662 WLAN_EID_REQUEST,
663 WLAN_EID_EXT_SUPP_RATES,
664 };
665 size_t offs;
666 u8 *newpos = pos;
667
668 if (!iwl_mvm_rrm_scan_needed(mvm)) {
669 memcpy(newpos, ies, len);
670 return newpos + len;
671 }
672
673 offs = ieee80211_ie_split(ies, len,
674 before_ds_params,
675 ARRAY_SIZE(before_ds_params),
676 0);
677
678 memcpy(newpos, ies, offs);
679 newpos += offs;
680
681 /* Add a placeholder for DS Parameter Set element */
682 *newpos++ = WLAN_EID_DS_PARAMS;
683 *newpos++ = 1;
684 *newpos++ = 0;
685
686 memcpy(newpos, ies + offs, len - offs);
687 newpos += len - offs;
688
689 return newpos;
690 }
691
692 static void
693 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
694 struct ieee80211_scan_ies *ies,
695 struct iwl_mvm_scan_params *params)
696 {
697 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
698 u8 *pos, *newpos;
699 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
700 params->mac_addr : NULL;
701
702 /*
703 * Unfortunately, right now the offload scan doesn't support randomising
704 * within the firmware, so until the firmware API is ready we implement
705 * it in the driver. This means that the scan iterations won't really be
706 * random, only when it's restarted, but at least that helps a bit.
707 */
708 if (mac_addr)
709 get_random_mask_addr(frame->sa, mac_addr,
710 params->mac_addr_mask);
711 else
712 memcpy(frame->sa, vif->addr, ETH_ALEN);
713
714 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
715 eth_broadcast_addr(frame->da);
716 eth_broadcast_addr(frame->bssid);
717 frame->seq_ctrl = 0;
718
719 pos = frame->u.probe_req.variable;
720 *pos++ = WLAN_EID_SSID;
721 *pos++ = 0;
722
723 params->preq.mac_header.offset = 0;
724 params->preq.mac_header.len = cpu_to_le16(24 + 2);
725
726 /* Insert ds parameter set element on 2.4 GHz band */
727 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
728 ies->ies[IEEE80211_BAND_2GHZ],
729 ies->len[IEEE80211_BAND_2GHZ],
730 pos);
731 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
732 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
733 pos = newpos;
734
735 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
736 ies->len[IEEE80211_BAND_5GHZ]);
737 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
738 params->preq.band_data[1].len =
739 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
740 pos += ies->len[IEEE80211_BAND_5GHZ];
741
742 memcpy(pos, ies->common_ies, ies->common_ie_len);
743 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
744 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
745 }
746
747 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
748 struct iwl_scan_req_lmac *cmd,
749 struct iwl_mvm_scan_params *params)
750 {
751 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
752 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
753 if (params->passive_fragmented)
754 cmd->fragmented_dwell =
755 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
756 cmd->max_out_time = cpu_to_le32(params->max_out_time);
757 cmd->suspend_time = cpu_to_le32(params->suspend_time);
758 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
759 }
760
761 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
762 struct ieee80211_scan_ies *ies,
763 int n_channels)
764 {
765 return ((n_ssids <= PROBE_OPTION_MAX) &&
766 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
767 (ies->common_ie_len +
768 ies->len[NL80211_BAND_2GHZ] +
769 ies->len[NL80211_BAND_5GHZ] <=
770 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
771 }
772
773 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, int n_iterations)
774 {
775 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
776
777 /* We can only use EBS if:
778 * 1. the feature is supported;
779 * 2. the last EBS was successful;
780 * 3. if only single scan, the single scan EBS API is supported.
781 */
782 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
783 mvm->last_ebs_successful &&
784 (n_iterations > 1 ||
785 (capa->api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS)));
786 }
787
788 static int iwl_mvm_scan_total_iterations(struct iwl_mvm_scan_params *params)
789 {
790 return params->schedule[0].iterations + params->schedule[1].iterations;
791 }
792
793 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
794 struct iwl_mvm_scan_params *params)
795 {
796 int flags = 0;
797
798 if (params->n_ssids == 0)
799 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
800
801 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
802 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
803
804 if (params->passive_fragmented)
805 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
806
807 if (iwl_mvm_rrm_scan_needed(mvm))
808 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
809
810 if (params->pass_all)
811 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
812 else
813 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
814
815 #ifdef CONFIG_IWLWIFI_DEBUGFS
816 if (mvm->scan_iter_notif_enabled)
817 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
818 #endif
819
820 return flags;
821 }
822
823 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
824 struct iwl_mvm_scan_params *params)
825 {
826 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
827 struct iwl_scan_probe_req *preq =
828 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
829 mvm->fw->ucode_capa.n_scan_channels);
830 u32 ssid_bitmap = 0;
831 int n_iterations = iwl_mvm_scan_total_iterations(params);
832
833 lockdep_assert_held(&mvm->mutex);
834
835 memset(cmd, 0, ksize(cmd));
836
837 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
838
839 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
840 cmd->iter_num = cpu_to_le32(1);
841 cmd->n_channels = (u8)params->n_channels;
842
843 cmd->delay = cpu_to_le32(params->delay);
844
845 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params));
846
847 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
848 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
849 MAC_FILTER_IN_BEACON);
850 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
851 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
852
853 /* this API uses bits 1-20 instead of 0-19 */
854 ssid_bitmap <<= 1;
855
856 cmd->schedule[0].delay = cpu_to_le16(params->interval);
857 cmd->schedule[0].iterations = params->schedule[0].iterations;
858 cmd->schedule[0].full_scan_mul = params->schedule[0].full_scan_mul;
859 cmd->schedule[1].delay = cpu_to_le16(params->interval);
860 cmd->schedule[1].iterations = params->schedule[1].iterations;
861 cmd->schedule[1].full_scan_mul = params->schedule[1].iterations;
862
863 if (iwl_mvm_scan_use_ebs(mvm, n_iterations)) {
864 cmd->channel_opt[0].flags =
865 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
866 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
867 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
868 cmd->channel_opt[0].non_ebs_ratio =
869 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
870 cmd->channel_opt[1].flags =
871 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
872 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
873 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
874 cmd->channel_opt[1].non_ebs_ratio =
875 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
876 }
877
878 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
879 params->n_channels, ssid_bitmap, cmd);
880
881 *preq = params->preq;
882
883 return 0;
884 }
885
886 /* UMAC scan API */
887
888 struct iwl_umac_scan_done {
889 struct iwl_mvm *mvm;
890 int type;
891 };
892
893 static int rate_to_scan_rate_flag(unsigned int rate)
894 {
895 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
896 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
897 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
898 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
899 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
900 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
901 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
902 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
903 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
904 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
905 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
906 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
907 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
908 };
909
910 return rate_to_scan_rate[rate];
911 }
912
913 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
914 {
915 struct ieee80211_supported_band *band;
916 unsigned int rates = 0;
917 int i;
918
919 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
920 for (i = 0; i < band->n_bitrates; i++)
921 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
922 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
923 for (i = 0; i < band->n_bitrates; i++)
924 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
925
926 /* Set both basic rates and supported rates */
927 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
928
929 return cpu_to_le32(rates);
930 }
931
932 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
933 {
934
935 struct iwl_scan_config *scan_config;
936 struct ieee80211_supported_band *band;
937 int num_channels =
938 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
939 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
940 int ret, i, j = 0, cmd_size, data_size;
941 struct iwl_host_cmd cmd = {
942 .id = SCAN_CFG_CMD,
943 };
944
945 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
946 return -ENOBUFS;
947
948 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
949
950 scan_config = kzalloc(cmd_size, GFP_KERNEL);
951 if (!scan_config)
952 return -ENOMEM;
953
954 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
955 scan_config->hdr.size = cpu_to_le16(data_size);
956 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
957 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
958 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
959 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
960 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
961 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
962 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
963 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
964 SCAN_CONFIG_N_CHANNELS(num_channels));
965 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
966 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
967 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
968 scan_config->out_of_channel_time = cpu_to_le32(170);
969 scan_config->suspend_time = cpu_to_le32(30);
970 scan_config->dwell_active = 20;
971 scan_config->dwell_passive = 110;
972 scan_config->dwell_fragmented = 20;
973
974 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
975
976 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
977 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
978 IWL_CHANNEL_FLAG_ACCURATE_EBS |
979 IWL_CHANNEL_FLAG_EBS_ADD |
980 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
981
982 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
983 for (i = 0; i < band->n_channels; i++, j++)
984 scan_config->channel_array[j] = band->channels[i].hw_value;
985 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
986 for (i = 0; i < band->n_channels; i++, j++)
987 scan_config->channel_array[j] = band->channels[i].hw_value;
988
989 cmd.data[0] = scan_config;
990 cmd.len[0] = cmd_size;
991 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
992
993 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
994
995 ret = iwl_mvm_send_cmd(mvm, &cmd);
996
997 kfree(scan_config);
998 return ret;
999 }
1000
1001 static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1002 {
1003 int i;
1004
1005 for (i = 0; i < mvm->max_scans; i++)
1006 if (mvm->scan_uid[i] == uid)
1007 return i;
1008
1009 return i;
1010 }
1011
1012 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1013 {
1014 return iwl_mvm_find_scan_uid(mvm, 0);
1015 }
1016
1017 static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm, int type)
1018 {
1019 int i;
1020
1021 for (i = 0; i < mvm->max_scans; i++)
1022 if (mvm->scan_uid[i] & type)
1023 return true;
1024
1025 return false;
1026 }
1027
1028 static int iwl_mvm_find_first_scan(struct iwl_mvm *mvm, int type)
1029 {
1030 int i;
1031
1032 for (i = 0; i < mvm->max_scans; i++)
1033 if (mvm->scan_uid[i] & type)
1034 return i;
1035
1036 return i;
1037 }
1038
1039 static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm, int type)
1040 {
1041 u32 uid;
1042
1043 /* make sure exactly one bit is on in scan type */
1044 WARN_ON(hweight8(type) != 1);
1045
1046 /*
1047 * Make sure scan uids are unique. If one scan lasts long time while
1048 * others are completing frequently, the seq number will wrap up and
1049 * we may have more than one scan with the same uid.
1050 */
1051 do {
1052 uid = type | (mvm->scan_seq_num <<
1053 IWL_UMAC_SCAN_UID_SEQ_OFFSET);
1054 mvm->scan_seq_num++;
1055 } while (iwl_mvm_find_scan_uid(mvm, uid) < mvm->max_scans);
1056
1057 IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
1058
1059 return uid;
1060 }
1061
1062 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1063 struct iwl_scan_req_umac *cmd,
1064 struct iwl_mvm_scan_params *params)
1065 {
1066 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1067 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1068 if (params->passive_fragmented)
1069 cmd->fragmented_dwell =
1070 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
1071 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1072 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1073 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1074
1075 if (iwl_mvm_scan_total_iterations(params) == 0)
1076 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1077 else
1078 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1079 }
1080
1081 static void
1082 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1083 struct ieee80211_channel **channels,
1084 int n_channels, u32 ssid_bitmap,
1085 struct iwl_scan_req_umac *cmd)
1086 {
1087 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1088 int i;
1089
1090 for (i = 0; i < n_channels; i++) {
1091 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1092 channel_cfg[i].channel_num = channels[i]->hw_value;
1093 channel_cfg[i].iter_count = 1;
1094 channel_cfg[i].iter_interval = 0;
1095 }
1096 }
1097
1098 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1099 struct iwl_mvm_scan_params *params)
1100 {
1101 int flags = 0;
1102
1103 if (params->n_ssids == 0)
1104 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1105
1106 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1107 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1108
1109 if (params->passive_fragmented)
1110 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1111
1112 if (iwl_mvm_rrm_scan_needed(mvm))
1113 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1114
1115 if (params->pass_all)
1116 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1117 else
1118 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1119
1120 if (iwl_mvm_scan_total_iterations(params) > 1)
1121 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1122
1123 #ifdef CONFIG_IWLWIFI_DEBUGFS
1124 if (mvm->scan_iter_notif_enabled)
1125 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1126 #endif
1127 return flags;
1128 }
1129
1130 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1131 struct iwl_mvm_scan_params *params)
1132 {
1133 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1134 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1135 sizeof(struct iwl_scan_channel_cfg_umac) *
1136 mvm->fw->ucode_capa.n_scan_channels;
1137 u32 uid;
1138 u32 ssid_bitmap = 0;
1139 int n_iterations = iwl_mvm_scan_total_iterations(params);
1140 int uid_idx;
1141
1142 lockdep_assert_held(&mvm->mutex);
1143
1144 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1145 if (uid_idx >= mvm->max_scans)
1146 return -EBUSY;
1147
1148 memset(cmd, 0, ksize(cmd));
1149 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1150 sizeof(struct iwl_mvm_umac_cmd_hdr));
1151
1152 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1153
1154 if (n_iterations == 1)
1155 uid = iwl_generate_scan_uid(mvm, IWL_MVM_SCAN_REGULAR);
1156 else
1157 uid = iwl_generate_scan_uid(mvm, IWL_MVM_SCAN_SCHED);
1158
1159 mvm->scan_uid[uid_idx] = uid;
1160 cmd->uid = cpu_to_le32(uid);
1161
1162 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params));
1163
1164 if (iwl_mvm_scan_use_ebs(mvm, n_iterations))
1165 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1166 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1167 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1168
1169 cmd->n_channels = params->n_channels;
1170
1171 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1172
1173 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1174 params->n_channels, ssid_bitmap, cmd);
1175
1176 /* With UMAC we use only one schedule for now, so use the sum
1177 * of the iterations (with a a maximum of 255).
1178 */
1179 sec_part->schedule[0].iter_count =
1180 (n_iterations > 255) ? 255 : n_iterations;
1181 sec_part->schedule[0].interval = cpu_to_le16(params->interval);
1182
1183 sec_part->delay = cpu_to_le16(params->delay);
1184 sec_part->preq = params->preq;
1185
1186 return 0;
1187 }
1188
1189 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1190 {
1191 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1192 }
1193
1194 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1195 {
1196 /* This looks a bit arbitrary, but the idea is that if we run
1197 * out of possible simultaneous scans and the userspace is
1198 * trying to run a scan type that is already running, we
1199 * return -EBUSY. But if the userspace wants to start a
1200 * different type of scan, we stop the opposite type to make
1201 * space for the new request. The reason is backwards
1202 * compatibility with old wpa_supplicant that wouldn't stop a
1203 * scheduled scan before starting a normal scan.
1204 */
1205
1206 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1207 return 0;
1208
1209 /* Use a switch, even though this is a bitmask, so that more
1210 * than one bits set will fall in default and we will warn.
1211 */
1212 switch (type) {
1213 case IWL_MVM_SCAN_REGULAR:
1214 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1215 return -EBUSY;
1216 return iwl_mvm_sched_scan_stop(mvm, true);
1217 case IWL_MVM_SCAN_SCHED:
1218 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1219 return -EBUSY;
1220 return iwl_mvm_reg_scan_stop(mvm);
1221 case IWL_MVM_SCAN_NETDETECT:
1222 /* No need to stop anything for net-detect since the
1223 * firmware is restarted anyway. This way, any sched
1224 * scans that were running will be restarted when we
1225 * resume.
1226 */
1227 return 0;
1228 default:
1229 WARN_ON(1);
1230 break;
1231 }
1232
1233 return -EIO;
1234 }
1235
1236 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1237 struct cfg80211_scan_request *req,
1238 struct ieee80211_scan_ies *ies)
1239 {
1240 struct iwl_host_cmd hcmd = {
1241 .len = { iwl_mvm_scan_size(mvm), },
1242 .data = { mvm->scan_cmd, },
1243 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1244 };
1245 struct iwl_mvm_scan_params params = {};
1246 int ret;
1247
1248 lockdep_assert_held(&mvm->mutex);
1249
1250 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1251 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1252 return -EBUSY;
1253 }
1254
1255 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1256 if (ret)
1257 return ret;
1258
1259 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1260
1261 /* we should have failed registration if scan_cmd was NULL */
1262 if (WARN_ON(!mvm->scan_cmd))
1263 return -ENOMEM;
1264
1265 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1266 return -ENOBUFS;
1267
1268 params.n_ssids = req->n_ssids;
1269 params.flags = req->flags;
1270 params.n_channels = req->n_channels;
1271 params.delay = 0;
1272 params.interval = 0;
1273 params.ssids = req->ssids;
1274 params.channels = req->channels;
1275 params.mac_addr = req->mac_addr;
1276 params.mac_addr_mask = req->mac_addr_mask;
1277 params.no_cck = req->no_cck;
1278 params.pass_all = true;
1279 params.n_match_sets = 0;
1280 params.match_sets = NULL;
1281
1282 params.schedule[0].iterations = 1;
1283 params.schedule[0].full_scan_mul = 0;
1284 params.schedule[1].iterations = 0;
1285 params.schedule[1].full_scan_mul = 0;
1286
1287 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1288
1289 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1290
1291 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1292 hcmd.id = SCAN_REQ_UMAC;
1293 ret = iwl_mvm_scan_umac(mvm, vif, &params);
1294 } else {
1295 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1296 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1297 }
1298
1299 if (ret)
1300 return ret;
1301
1302 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1303 if (!ret) {
1304 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1305 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1306 } else {
1307 /* If the scan failed, it usually means that the FW was unable
1308 * to allocate the time events. Warn on it, but maybe we
1309 * should try to send the command again with different params.
1310 */
1311 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1312 }
1313
1314 if (ret)
1315 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1316
1317 return ret;
1318 }
1319
1320 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1321 struct ieee80211_vif *vif,
1322 struct cfg80211_sched_scan_request *req,
1323 struct ieee80211_scan_ies *ies,
1324 int type)
1325 {
1326 struct iwl_host_cmd hcmd = {
1327 .len = { iwl_mvm_scan_size(mvm), },
1328 .data = { mvm->scan_cmd, },
1329 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1330 };
1331 struct iwl_mvm_scan_params params = {};
1332 int ret;
1333
1334 lockdep_assert_held(&mvm->mutex);
1335
1336 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1337 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1338 return -EBUSY;
1339 }
1340
1341 ret = iwl_mvm_check_running_scans(mvm, type);
1342 if (ret)
1343 return ret;
1344
1345 /* we should have failed registration if scan_cmd was NULL */
1346 if (WARN_ON(!mvm->scan_cmd))
1347 return -ENOMEM;
1348
1349 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1350 return -ENOBUFS;
1351
1352 params.n_ssids = req->n_ssids;
1353 params.flags = req->flags;
1354 params.n_channels = req->n_channels;
1355 params.ssids = req->ssids;
1356 params.channels = req->channels;
1357 params.mac_addr = req->mac_addr;
1358 params.mac_addr_mask = req->mac_addr_mask;
1359 params.no_cck = false;
1360 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1361 params.n_match_sets = req->n_match_sets;
1362 params.match_sets = req->match_sets;
1363
1364 params.schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1365 params.schedule[0].full_scan_mul = 1;
1366 params.schedule[1].iterations = 0xff;
1367 params.schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1368
1369 if (req->interval > U16_MAX) {
1370 IWL_DEBUG_SCAN(mvm,
1371 "interval value is > 16-bits, set to max possible\n");
1372 params.interval = U16_MAX;
1373 } else {
1374 params.interval = req->interval / MSEC_PER_SEC;
1375 }
1376
1377 /* In theory, LMAC scans can handle a 32-bit delay, but since
1378 * waiting for over 18 hours to start the scan is a bit silly
1379 * and to keep it aligned with UMAC scans (which only support
1380 * 16-bit delays), trim it down to 16-bits.
1381 */
1382 if (req->delay > U16_MAX) {
1383 IWL_DEBUG_SCAN(mvm,
1384 "delay value is > 16-bits, set to max possible\n");
1385 params.delay = U16_MAX;
1386 } else {
1387 params.delay = req->delay;
1388 }
1389
1390 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1391
1392 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1393 if (ret)
1394 return ret;
1395
1396 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1397
1398 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1399 hcmd.id = SCAN_REQ_UMAC;
1400 ret = iwl_mvm_scan_umac(mvm, vif, &params);
1401 } else {
1402 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1403 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1404 }
1405
1406 if (ret)
1407 return ret;
1408
1409 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1410 if (!ret) {
1411 IWL_DEBUG_SCAN(mvm,
1412 "Sched scan request was sent successfully\n");
1413 mvm->scan_status |= type;
1414 } else {
1415 /* If the scan failed, it usually means that the FW was unable
1416 * to allocate the time events. Warn on it, but maybe we
1417 * should try to send the command again with different params.
1418 */
1419 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1420 }
1421
1422 return ret;
1423 }
1424
1425 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1426 struct iwl_rx_cmd_buffer *rxb,
1427 struct iwl_device_cmd *cmd)
1428 {
1429 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1430 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1431 u32 uid = __le32_to_cpu(notif->uid);
1432 bool sched = !!(uid & IWL_MVM_SCAN_SCHED);
1433 int uid_idx = iwl_mvm_find_scan_uid(mvm, uid);
1434
1435 /*
1436 * Scan uid may be set to zero in case of scan abort request from above.
1437 */
1438 if (uid_idx >= mvm->max_scans)
1439 return 0;
1440
1441 IWL_DEBUG_SCAN(mvm,
1442 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
1443 uid, sched ? "sched" : "regular",
1444 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1445 "completed" : "aborted",
1446 notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
1447 "success" : "failed");
1448
1449 if (notif->ebs_status)
1450 mvm->last_ebs_successful = false;
1451
1452 mvm->scan_uid[uid_idx] = 0;
1453
1454 if (!sched) {
1455 ieee80211_scan_completed(mvm->hw,
1456 notif->status ==
1457 IWL_SCAN_OFFLOAD_ABORTED);
1458 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1459 } else if (!iwl_mvm_find_scan_type(mvm, IWL_MVM_SCAN_SCHED)) {
1460 ieee80211_sched_scan_stopped(mvm->hw);
1461 } else {
1462 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
1463 }
1464
1465 return 0;
1466 }
1467
1468 int iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1469 struct iwl_rx_cmd_buffer *rxb,
1470 struct iwl_device_cmd *cmd)
1471 {
1472 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1473 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1474 u8 buf[256];
1475
1476 IWL_DEBUG_SCAN(mvm,
1477 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1478 notif->status, notif->scanned_channels,
1479 iwl_mvm_dump_channel_list(notif->results,
1480 notif->scanned_channels, buf,
1481 sizeof(buf)));
1482 return 0;
1483 }
1484
1485 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
1486 struct iwl_rx_packet *pkt, void *data)
1487 {
1488 struct iwl_umac_scan_done *scan_done = data;
1489 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1490 u32 uid = __le32_to_cpu(notif->uid);
1491 int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid);
1492
1493 if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
1494 return false;
1495
1496 if (uid_idx >= scan_done->mvm->max_scans)
1497 return false;
1498
1499 /*
1500 * Clear scan uid of scans that was aborted from above and completed
1501 * in FW so the RX handler does nothing. Set last_ebs_successful here if
1502 * needed.
1503 */
1504 scan_done->mvm->scan_uid[uid_idx] = 0;
1505
1506 if (notif->ebs_status)
1507 scan_done->mvm->last_ebs_successful = false;
1508
1509 return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
1510 }
1511
1512 static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
1513 {
1514 struct iwl_umac_scan_abort cmd = {
1515 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
1516 sizeof(struct iwl_mvm_umac_cmd_hdr)),
1517 .uid = cpu_to_le32(uid),
1518 };
1519
1520 lockdep_assert_held(&mvm->mutex);
1521
1522 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1523
1524 return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
1525 }
1526
1527 static int iwl_mvm_umac_scan_stop(struct iwl_mvm *mvm, int type)
1528 {
1529 struct iwl_notification_wait wait_scan_done;
1530 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, };
1531 struct iwl_umac_scan_done scan_done = {
1532 .mvm = mvm,
1533 .type = type,
1534 };
1535 int i, ret = -EIO;
1536
1537 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1538 scan_done_notif,
1539 ARRAY_SIZE(scan_done_notif),
1540 iwl_scan_umac_done_check, &scan_done);
1541
1542 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1543
1544 for (i = 0; i < mvm->max_scans; i++) {
1545 if (mvm->scan_uid[i] & type) {
1546 int err;
1547
1548 err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
1549 if (!err)
1550 ret = 0;
1551 }
1552 }
1553
1554 if (ret) {
1555 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
1556 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1557 return ret;
1558 }
1559
1560 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1561
1562 return ret;
1563 }
1564
1565 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1566 {
1567 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1568 return sizeof(struct iwl_scan_req_umac) +
1569 sizeof(struct iwl_scan_channel_cfg_umac) *
1570 mvm->fw->ucode_capa.n_scan_channels +
1571 sizeof(struct iwl_scan_req_umac_tail);
1572
1573 return sizeof(struct iwl_scan_req_lmac) +
1574 sizeof(struct iwl_scan_channel_cfg_lmac) *
1575 mvm->fw->ucode_capa.n_scan_channels +
1576 sizeof(struct iwl_scan_probe_req);
1577 }
1578
1579 /*
1580 * This function is used in nic restart flow, to inform mac80211 about scans
1581 * that was aborted by restart flow or by an assert.
1582 */
1583 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1584 {
1585 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1586 u32 uid, i;
1587
1588 uid = iwl_mvm_find_first_scan(mvm, IWL_MVM_SCAN_REGULAR);
1589 if (uid < mvm->max_scans) {
1590 ieee80211_scan_completed(mvm->hw, true);
1591 mvm->scan_uid[uid] = 0;
1592 }
1593 uid = iwl_mvm_find_first_scan(mvm, IWL_MVM_SCAN_SCHED);
1594 if (uid < mvm->max_scans && !mvm->restart_fw) {
1595 ieee80211_sched_scan_stopped(mvm->hw);
1596 mvm->scan_uid[uid] = 0;
1597 }
1598
1599 /* We shouldn't have any UIDs still set. Loop over all the
1600 * UIDs to make sure there's nothing left there and warn if
1601 * any is found.
1602 */
1603 for (i = 0; i < mvm->max_scans; i++) {
1604 if (WARN_ONCE(mvm->scan_uid[i],
1605 "UMAC scan UID %d was not cleaned\n",
1606 mvm->scan_uid[i]))
1607 mvm->scan_uid[i] = 0;
1608 }
1609 } else {
1610 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1611 ieee80211_scan_completed(mvm->hw, true);
1612
1613 /* Sched scan will be restarted by mac80211 in
1614 * restart_hw, so do not report if FW is about to be
1615 * restarted.
1616 */
1617 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1618 ieee80211_sched_scan_stopped(mvm->hw);
1619 }
1620 }
1621
1622 int iwl_mvm_reg_scan_stop(struct iwl_mvm *mvm)
1623 {
1624 int ret;
1625
1626 if (!(mvm->scan_status & IWL_MVM_SCAN_REGULAR))
1627 return 0;
1628
1629 if (iwl_mvm_is_radio_killed(mvm)) {
1630 ret = 0;
1631 goto out;
1632 }
1633
1634 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1635 ret = iwl_mvm_umac_scan_stop(mvm, IWL_MVM_SCAN_REGULAR);
1636 else
1637 ret = iwl_mvm_lmac_scan_stop(mvm, IWL_MVM_SCAN_REGULAR);
1638
1639 if (!ret)
1640 mvm->scan_status |= IWL_MVM_SCAN_STOPPING_REGULAR;
1641 out:
1642 /* Clear the scan status so the next scan requests will
1643 * succeed and mark the scan as stopping, so that the Rx
1644 * handler doesn't do anything, as the scan was stopped from
1645 * above. Since the rx handler won't do anything now, we have
1646 * to release the scan reference here.
1647 */
1648 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1649
1650 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
1651 ieee80211_scan_completed(mvm->hw, true);
1652
1653 return ret;
1654 }
1655
1656 int iwl_mvm_sched_scan_stop(struct iwl_mvm *mvm, bool notify)
1657 {
1658 int ret;
1659
1660 if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED))
1661 return 0;
1662
1663 if (iwl_mvm_is_radio_killed(mvm)) {
1664 ret = 0;
1665 goto out;
1666 }
1667
1668 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1669 ret = iwl_mvm_umac_scan_stop(mvm, IWL_MVM_SCAN_SCHED);
1670 else
1671 ret = iwl_mvm_lmac_scan_stop(mvm, IWL_MVM_SCAN_SCHED);
1672
1673 if (!ret)
1674 mvm->scan_status |= IWL_MVM_SCAN_STOPPING_SCHED;
1675 out:
1676 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
1677 if (notify)
1678 ieee80211_sched_scan_stopped(mvm->hw);
1679
1680 return ret;
1681 }
Linux kernel - Deliverables
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