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iwlwifi: mvm: combine regular and sched scan stop functions
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
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 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
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15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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23 * USA
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26 * in the file called COPYING.
27 *
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29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
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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_lmac_scan_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_match_found(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_lmac_scan_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_lmac_scan_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 void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
588 struct iwl_scan_req_tx_cmd *tx_cmd,
589 bool no_cck)
590 {
591 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
592 TX_CMD_FLG_BT_DIS);
593 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
594 IEEE80211_BAND_2GHZ,
595 no_cck);
596 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
597
598 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
599 TX_CMD_FLG_BT_DIS);
600 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
601 IEEE80211_BAND_5GHZ,
602 no_cck);
603 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
604 }
605
606 static void
607 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
608 struct ieee80211_channel **channels,
609 int n_channels, u32 ssid_bitmap,
610 struct iwl_scan_req_lmac *cmd)
611 {
612 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
613 int i;
614
615 for (i = 0; i < n_channels; i++) {
616 channel_cfg[i].channel_num =
617 cpu_to_le16(channels[i]->hw_value);
618 channel_cfg[i].iter_count = cpu_to_le16(1);
619 channel_cfg[i].iter_interval = 0;
620 channel_cfg[i].flags =
621 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
622 ssid_bitmap);
623 }
624 }
625
626 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
627 size_t len, u8 *const pos)
628 {
629 static const u8 before_ds_params[] = {
630 WLAN_EID_SSID,
631 WLAN_EID_SUPP_RATES,
632 WLAN_EID_REQUEST,
633 WLAN_EID_EXT_SUPP_RATES,
634 };
635 size_t offs;
636 u8 *newpos = pos;
637
638 if (!iwl_mvm_rrm_scan_needed(mvm)) {
639 memcpy(newpos, ies, len);
640 return newpos + len;
641 }
642
643 offs = ieee80211_ie_split(ies, len,
644 before_ds_params,
645 ARRAY_SIZE(before_ds_params),
646 0);
647
648 memcpy(newpos, ies, offs);
649 newpos += offs;
650
651 /* Add a placeholder for DS Parameter Set element */
652 *newpos++ = WLAN_EID_DS_PARAMS;
653 *newpos++ = 1;
654 *newpos++ = 0;
655
656 memcpy(newpos, ies + offs, len - offs);
657 newpos += len - offs;
658
659 return newpos;
660 }
661
662 static void
663 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
664 struct ieee80211_scan_ies *ies,
665 struct iwl_mvm_scan_params *params)
666 {
667 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
668 u8 *pos, *newpos;
669 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
670 params->mac_addr : NULL;
671
672 /*
673 * Unfortunately, right now the offload scan doesn't support randomising
674 * within the firmware, so until the firmware API is ready we implement
675 * it in the driver. This means that the scan iterations won't really be
676 * random, only when it's restarted, but at least that helps a bit.
677 */
678 if (mac_addr)
679 get_random_mask_addr(frame->sa, mac_addr,
680 params->mac_addr_mask);
681 else
682 memcpy(frame->sa, vif->addr, ETH_ALEN);
683
684 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
685 eth_broadcast_addr(frame->da);
686 eth_broadcast_addr(frame->bssid);
687 frame->seq_ctrl = 0;
688
689 pos = frame->u.probe_req.variable;
690 *pos++ = WLAN_EID_SSID;
691 *pos++ = 0;
692
693 params->preq.mac_header.offset = 0;
694 params->preq.mac_header.len = cpu_to_le16(24 + 2);
695
696 /* Insert ds parameter set element on 2.4 GHz band */
697 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
698 ies->ies[IEEE80211_BAND_2GHZ],
699 ies->len[IEEE80211_BAND_2GHZ],
700 pos);
701 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
702 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
703 pos = newpos;
704
705 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
706 ies->len[IEEE80211_BAND_5GHZ]);
707 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
708 params->preq.band_data[1].len =
709 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
710 pos += ies->len[IEEE80211_BAND_5GHZ];
711
712 memcpy(pos, ies->common_ies, ies->common_ie_len);
713 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
714 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
715 }
716
717 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm,
718 enum iwl_scan_priority_ext prio)
719 {
720 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY)
721 return cpu_to_le32(prio);
722
723 if (prio <= IWL_SCAN_PRIORITY_EXT_2)
724 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
725
726 if (prio <= IWL_SCAN_PRIORITY_EXT_4)
727 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
728
729 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
730 }
731
732 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
733 struct iwl_scan_req_lmac *cmd,
734 struct iwl_mvm_scan_params *params)
735 {
736 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
737 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
738 if (params->passive_fragmented)
739 cmd->fragmented_dwell =
740 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
741 cmd->max_out_time = cpu_to_le32(params->max_out_time);
742 cmd->suspend_time = cpu_to_le32(params->suspend_time);
743 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
744 }
745
746 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
747 struct ieee80211_scan_ies *ies,
748 int n_channels)
749 {
750 return ((n_ssids <= PROBE_OPTION_MAX) &&
751 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
752 (ies->common_ie_len +
753 ies->len[NL80211_BAND_2GHZ] +
754 ies->len[NL80211_BAND_5GHZ] <=
755 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
756 }
757
758 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, int n_iterations)
759 {
760 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
761
762 /* We can only use EBS if:
763 * 1. the feature is supported;
764 * 2. the last EBS was successful;
765 * 3. if only single scan, the single scan EBS API is supported.
766 */
767 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
768 mvm->last_ebs_successful &&
769 (n_iterations > 1 ||
770 (capa->api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS)));
771 }
772
773 static int iwl_mvm_scan_total_iterations(struct iwl_mvm_scan_params *params)
774 {
775 return params->schedule[0].iterations + params->schedule[1].iterations;
776 }
777
778 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
779 struct iwl_mvm_scan_params *params)
780 {
781 int flags = 0;
782
783 if (params->n_ssids == 0)
784 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
785
786 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
787 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
788
789 if (params->passive_fragmented)
790 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
791
792 if (iwl_mvm_rrm_scan_needed(mvm))
793 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
794
795 if (params->pass_all)
796 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
797 else
798 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
799
800 #ifdef CONFIG_IWLWIFI_DEBUGFS
801 if (mvm->scan_iter_notif_enabled)
802 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
803 #endif
804
805 return flags;
806 }
807
808 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
809 struct iwl_mvm_scan_params *params)
810 {
811 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
812 struct iwl_scan_probe_req *preq =
813 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
814 mvm->fw->ucode_capa.n_scan_channels);
815 u32 ssid_bitmap = 0;
816 int n_iterations = iwl_mvm_scan_total_iterations(params);
817
818 lockdep_assert_held(&mvm->mutex);
819
820 memset(cmd, 0, ksize(cmd));
821
822 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
823
824 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
825 cmd->iter_num = cpu_to_le32(1);
826 cmd->n_channels = (u8)params->n_channels;
827
828 cmd->delay = cpu_to_le32(params->delay);
829
830 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params));
831
832 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
833 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
834 MAC_FILTER_IN_BEACON);
835 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
836 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
837
838 /* this API uses bits 1-20 instead of 0-19 */
839 ssid_bitmap <<= 1;
840
841 cmd->schedule[0].delay = cpu_to_le16(params->interval);
842 cmd->schedule[0].iterations = params->schedule[0].iterations;
843 cmd->schedule[0].full_scan_mul = params->schedule[0].full_scan_mul;
844 cmd->schedule[1].delay = cpu_to_le16(params->interval);
845 cmd->schedule[1].iterations = params->schedule[1].iterations;
846 cmd->schedule[1].full_scan_mul = params->schedule[1].iterations;
847
848 if (iwl_mvm_scan_use_ebs(mvm, n_iterations)) {
849 cmd->channel_opt[0].flags =
850 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
851 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
852 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
853 cmd->channel_opt[0].non_ebs_ratio =
854 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
855 cmd->channel_opt[1].flags =
856 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
857 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
858 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
859 cmd->channel_opt[1].non_ebs_ratio =
860 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
861 }
862
863 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
864 params->n_channels, ssid_bitmap, cmd);
865
866 *preq = params->preq;
867
868 return 0;
869 }
870
871 static int rate_to_scan_rate_flag(unsigned int rate)
872 {
873 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
874 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
875 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
876 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
877 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
878 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
879 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
880 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
881 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
882 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
883 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
884 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
885 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
886 };
887
888 return rate_to_scan_rate[rate];
889 }
890
891 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
892 {
893 struct ieee80211_supported_band *band;
894 unsigned int rates = 0;
895 int i;
896
897 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
898 for (i = 0; i < band->n_bitrates; i++)
899 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
900 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
901 for (i = 0; i < band->n_bitrates; i++)
902 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
903
904 /* Set both basic rates and supported rates */
905 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
906
907 return cpu_to_le32(rates);
908 }
909
910 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
911 {
912
913 struct iwl_scan_config *scan_config;
914 struct ieee80211_supported_band *band;
915 int num_channels =
916 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
917 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
918 int ret, i, j = 0, cmd_size, data_size;
919 struct iwl_host_cmd cmd = {
920 .id = SCAN_CFG_CMD,
921 };
922
923 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
924 return -ENOBUFS;
925
926 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
927
928 scan_config = kzalloc(cmd_size, GFP_KERNEL);
929 if (!scan_config)
930 return -ENOMEM;
931
932 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
933 scan_config->hdr.size = cpu_to_le16(data_size);
934 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
935 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
936 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
937 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
938 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
939 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
940 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
941 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
942 SCAN_CONFIG_N_CHANNELS(num_channels));
943 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
944 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
945 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
946 scan_config->out_of_channel_time = cpu_to_le32(170);
947 scan_config->suspend_time = cpu_to_le32(30);
948 scan_config->dwell_active = 20;
949 scan_config->dwell_passive = 110;
950 scan_config->dwell_fragmented = 20;
951
952 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
953
954 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
955 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
956 IWL_CHANNEL_FLAG_ACCURATE_EBS |
957 IWL_CHANNEL_FLAG_EBS_ADD |
958 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
959
960 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
961 for (i = 0; i < band->n_channels; i++, j++)
962 scan_config->channel_array[j] = band->channels[i].hw_value;
963 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
964 for (i = 0; i < band->n_channels; i++, j++)
965 scan_config->channel_array[j] = band->channels[i].hw_value;
966
967 cmd.data[0] = scan_config;
968 cmd.len[0] = cmd_size;
969 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
970
971 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
972
973 ret = iwl_mvm_send_cmd(mvm, &cmd);
974
975 kfree(scan_config);
976 return ret;
977 }
978
979 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
980 {
981 int i;
982
983 for (i = 0; i < mvm->max_scans; i++)
984 if (mvm->scan_uid_status[i] == status)
985 return i;
986
987 return -ENOENT;
988 }
989
990 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
991 struct iwl_scan_req_umac *cmd,
992 struct iwl_mvm_scan_params *params)
993 {
994 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
995 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
996 if (params->passive_fragmented)
997 cmd->fragmented_dwell =
998 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
999 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1000 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1001 cmd->scan_priority =
1002 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1003
1004 if (iwl_mvm_scan_total_iterations(params) == 0)
1005 cmd->ooc_priority =
1006 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1007 else
1008 cmd->ooc_priority =
1009 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
1010 }
1011
1012 static void
1013 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1014 struct ieee80211_channel **channels,
1015 int n_channels, u32 ssid_bitmap,
1016 struct iwl_scan_req_umac *cmd)
1017 {
1018 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1019 int i;
1020
1021 for (i = 0; i < n_channels; i++) {
1022 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1023 channel_cfg[i].channel_num = channels[i]->hw_value;
1024 channel_cfg[i].iter_count = 1;
1025 channel_cfg[i].iter_interval = 0;
1026 }
1027 }
1028
1029 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1030 struct iwl_mvm_scan_params *params)
1031 {
1032 int flags = 0;
1033
1034 if (params->n_ssids == 0)
1035 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1036
1037 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1038 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1039
1040 if (params->passive_fragmented)
1041 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1042
1043 if (iwl_mvm_rrm_scan_needed(mvm))
1044 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1045
1046 if (params->pass_all)
1047 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1048 else
1049 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1050
1051 if (iwl_mvm_scan_total_iterations(params) > 1)
1052 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1053
1054 #ifdef CONFIG_IWLWIFI_DEBUGFS
1055 if (mvm->scan_iter_notif_enabled)
1056 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1057 #endif
1058 return flags;
1059 }
1060
1061 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1062 struct iwl_mvm_scan_params *params,
1063 int type)
1064 {
1065 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1066 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1067 sizeof(struct iwl_scan_channel_cfg_umac) *
1068 mvm->fw->ucode_capa.n_scan_channels;
1069 int uid;
1070 u32 ssid_bitmap = 0;
1071 int n_iterations = iwl_mvm_scan_total_iterations(params);
1072
1073 lockdep_assert_held(&mvm->mutex);
1074
1075 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1076 if (uid < 0)
1077 return uid;
1078
1079 memset(cmd, 0, ksize(cmd));
1080 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1081 sizeof(struct iwl_mvm_umac_cmd_hdr));
1082
1083 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1084
1085 mvm->scan_uid_status[uid] = type;
1086
1087 cmd->uid = cpu_to_le32(uid);
1088 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params));
1089
1090 if (iwl_mvm_scan_use_ebs(mvm, n_iterations))
1091 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1092 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1093 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1094
1095 cmd->n_channels = params->n_channels;
1096
1097 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1098
1099 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1100 params->n_channels, ssid_bitmap, cmd);
1101
1102 /* With UMAC we use only one schedule for now, so use the sum
1103 * of the iterations (with a a maximum of 255).
1104 */
1105 sec_part->schedule[0].iter_count =
1106 (n_iterations > 255) ? 255 : n_iterations;
1107 sec_part->schedule[0].interval = cpu_to_le16(params->interval);
1108
1109 sec_part->delay = cpu_to_le16(params->delay);
1110 sec_part->preq = params->preq;
1111
1112 return 0;
1113 }
1114
1115 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1116 {
1117 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1118 }
1119
1120 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1121 {
1122 /* This looks a bit arbitrary, but the idea is that if we run
1123 * out of possible simultaneous scans and the userspace is
1124 * trying to run a scan type that is already running, we
1125 * return -EBUSY. But if the userspace wants to start a
1126 * different type of scan, we stop the opposite type to make
1127 * space for the new request. The reason is backwards
1128 * compatibility with old wpa_supplicant that wouldn't stop a
1129 * scheduled scan before starting a normal scan.
1130 */
1131
1132 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1133 return 0;
1134
1135 /* Use a switch, even though this is a bitmask, so that more
1136 * than one bits set will fall in default and we will warn.
1137 */
1138 switch (type) {
1139 case IWL_MVM_SCAN_REGULAR:
1140 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1141 return -EBUSY;
1142 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1143 case IWL_MVM_SCAN_SCHED:
1144 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1145 return -EBUSY;
1146 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1147 case IWL_MVM_SCAN_NETDETECT:
1148 /* No need to stop anything for net-detect since the
1149 * firmware is restarted anyway. This way, any sched
1150 * scans that were running will be restarted when we
1151 * resume.
1152 */
1153 return 0;
1154 default:
1155 WARN_ON(1);
1156 break;
1157 }
1158
1159 return -EIO;
1160 }
1161
1162 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1163 struct cfg80211_scan_request *req,
1164 struct ieee80211_scan_ies *ies)
1165 {
1166 struct iwl_host_cmd hcmd = {
1167 .len = { iwl_mvm_scan_size(mvm), },
1168 .data = { mvm->scan_cmd, },
1169 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1170 };
1171 struct iwl_mvm_scan_params params = {};
1172 int ret;
1173
1174 lockdep_assert_held(&mvm->mutex);
1175
1176 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1177 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1178 return -EBUSY;
1179 }
1180
1181 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1182 if (ret)
1183 return ret;
1184
1185 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1186
1187 /* we should have failed registration if scan_cmd was NULL */
1188 if (WARN_ON(!mvm->scan_cmd))
1189 return -ENOMEM;
1190
1191 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1192 return -ENOBUFS;
1193
1194 params.n_ssids = req->n_ssids;
1195 params.flags = req->flags;
1196 params.n_channels = req->n_channels;
1197 params.delay = 0;
1198 params.interval = 0;
1199 params.ssids = req->ssids;
1200 params.channels = req->channels;
1201 params.mac_addr = req->mac_addr;
1202 params.mac_addr_mask = req->mac_addr_mask;
1203 params.no_cck = req->no_cck;
1204 params.pass_all = true;
1205 params.n_match_sets = 0;
1206 params.match_sets = NULL;
1207
1208 params.schedule[0].iterations = 1;
1209 params.schedule[0].full_scan_mul = 0;
1210 params.schedule[1].iterations = 0;
1211 params.schedule[1].full_scan_mul = 0;
1212
1213 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1214
1215 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1216
1217 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1218 hcmd.id = SCAN_REQ_UMAC;
1219 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1220 IWL_MVM_SCAN_REGULAR);
1221 } else {
1222 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1223 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1224 }
1225
1226 if (ret)
1227 return ret;
1228
1229 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1230 if (!ret) {
1231 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1232 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1233 } else {
1234 /* If the scan failed, it usually means that the FW was unable
1235 * to allocate the time events. Warn on it, but maybe we
1236 * should try to send the command again with different params.
1237 */
1238 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1239 }
1240
1241 if (ret)
1242 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1243
1244 return ret;
1245 }
1246
1247 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1248 struct ieee80211_vif *vif,
1249 struct cfg80211_sched_scan_request *req,
1250 struct ieee80211_scan_ies *ies,
1251 int type)
1252 {
1253 struct iwl_host_cmd hcmd = {
1254 .len = { iwl_mvm_scan_size(mvm), },
1255 .data = { mvm->scan_cmd, },
1256 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1257 };
1258 struct iwl_mvm_scan_params params = {};
1259 int ret;
1260
1261 lockdep_assert_held(&mvm->mutex);
1262
1263 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1264 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1265 return -EBUSY;
1266 }
1267
1268 ret = iwl_mvm_check_running_scans(mvm, type);
1269 if (ret)
1270 return ret;
1271
1272 /* we should have failed registration if scan_cmd was NULL */
1273 if (WARN_ON(!mvm->scan_cmd))
1274 return -ENOMEM;
1275
1276 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1277 return -ENOBUFS;
1278
1279 params.n_ssids = req->n_ssids;
1280 params.flags = req->flags;
1281 params.n_channels = req->n_channels;
1282 params.ssids = req->ssids;
1283 params.channels = req->channels;
1284 params.mac_addr = req->mac_addr;
1285 params.mac_addr_mask = req->mac_addr_mask;
1286 params.no_cck = false;
1287 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1288 params.n_match_sets = req->n_match_sets;
1289 params.match_sets = req->match_sets;
1290
1291 params.schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1292 params.schedule[0].full_scan_mul = 1;
1293 params.schedule[1].iterations = 0xff;
1294 params.schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1295
1296 if (req->interval > U16_MAX) {
1297 IWL_DEBUG_SCAN(mvm,
1298 "interval value is > 16-bits, set to max possible\n");
1299 params.interval = U16_MAX;
1300 } else {
1301 params.interval = req->interval / MSEC_PER_SEC;
1302 }
1303
1304 /* In theory, LMAC scans can handle a 32-bit delay, but since
1305 * waiting for over 18 hours to start the scan is a bit silly
1306 * and to keep it aligned with UMAC scans (which only support
1307 * 16-bit delays), trim it down to 16-bits.
1308 */
1309 if (req->delay > U16_MAX) {
1310 IWL_DEBUG_SCAN(mvm,
1311 "delay value is > 16-bits, set to max possible\n");
1312 params.delay = U16_MAX;
1313 } else {
1314 params.delay = req->delay;
1315 }
1316
1317 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1318
1319 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1320 if (ret)
1321 return ret;
1322
1323 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1324
1325 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1326 hcmd.id = SCAN_REQ_UMAC;
1327 ret = iwl_mvm_scan_umac(mvm, vif, &params, IWL_MVM_SCAN_SCHED);
1328 } else {
1329 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1330 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1331 }
1332
1333 if (ret)
1334 return ret;
1335
1336 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1337 if (!ret) {
1338 IWL_DEBUG_SCAN(mvm,
1339 "Sched scan request was sent successfully\n");
1340 mvm->scan_status |= type;
1341 } else {
1342 /* If the scan failed, it usually means that the FW was unable
1343 * to allocate the time events. Warn on it, but maybe we
1344 * should try to send the command again with different params.
1345 */
1346 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1347 }
1348
1349 return ret;
1350 }
1351
1352 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1353 struct iwl_rx_cmd_buffer *rxb,
1354 struct iwl_device_cmd *cmd)
1355 {
1356 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1357 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1358 u32 uid = __le32_to_cpu(notif->uid);
1359 bool sched = (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED);
1360
1361 /* the status may be already zero in case of scan abort from above */
1362 if (mvm->scan_uid_status[uid] == 0)
1363 return 0;
1364
1365 IWL_DEBUG_SCAN(mvm,
1366 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
1367 uid, sched ? "sched" : "regular",
1368 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1369 "completed" : "aborted",
1370 notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
1371 "success" : "failed");
1372
1373 if (notif->ebs_status)
1374 mvm->last_ebs_successful = false;
1375
1376 mvm->scan_uid_status[uid] = 0;
1377
1378 if (!sched) {
1379 ieee80211_scan_completed(mvm->hw,
1380 notif->status ==
1381 IWL_SCAN_OFFLOAD_ABORTED);
1382 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1383 } else if (iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED) < 0) {
1384 ieee80211_sched_scan_stopped(mvm->hw);
1385 } else {
1386 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
1387 }
1388
1389 return 0;
1390 }
1391
1392 int iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1393 struct iwl_rx_cmd_buffer *rxb,
1394 struct iwl_device_cmd *cmd)
1395 {
1396 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1397 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1398 u8 buf[256];
1399
1400 IWL_DEBUG_SCAN(mvm,
1401 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1402 notif->status, notif->scanned_channels,
1403 iwl_mvm_dump_channel_list(notif->results,
1404 notif->scanned_channels, buf,
1405 sizeof(buf)));
1406 return 0;
1407 }
1408
1409 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1410 {
1411 struct iwl_umac_scan_abort cmd = {
1412 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
1413 sizeof(struct iwl_mvm_umac_cmd_hdr)),
1414 };
1415 int uid, ret;
1416
1417 lockdep_assert_held(&mvm->mutex);
1418
1419 /* We should always get a valid index here, because we already
1420 * checked that this type of scan was running in the generic
1421 * code.
1422 */
1423 uid = iwl_mvm_scan_uid_by_status(mvm, type);
1424 if (WARN_ON_ONCE(uid < 0))
1425 return uid;
1426
1427 cmd.uid = cpu_to_le32(uid);
1428
1429 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1430
1431 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
1432 if (!ret)
1433 mvm->scan_uid_status[uid] = 0;
1434
1435 return ret;
1436 }
1437
1438 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1439 {
1440 struct iwl_notification_wait wait_scan_done;
1441 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1442 SCAN_OFFLOAD_COMPLETE, };
1443 int ret;
1444
1445 lockdep_assert_held(&mvm->mutex);
1446
1447 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1448 scan_done_notif,
1449 ARRAY_SIZE(scan_done_notif),
1450 NULL, NULL);
1451
1452 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1453
1454 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1455 ret = iwl_mvm_umac_scan_abort(mvm, type);
1456 else
1457 ret = iwl_mvm_lmac_scan_abort(mvm);
1458
1459 if (ret) {
1460 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1461 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1462 return ret;
1463 }
1464
1465 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1466
1467 return ret;
1468 }
1469
1470 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1471 {
1472 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1473 return sizeof(struct iwl_scan_req_umac) +
1474 sizeof(struct iwl_scan_channel_cfg_umac) *
1475 mvm->fw->ucode_capa.n_scan_channels +
1476 sizeof(struct iwl_scan_req_umac_tail);
1477
1478 return sizeof(struct iwl_scan_req_lmac) +
1479 sizeof(struct iwl_scan_channel_cfg_lmac) *
1480 mvm->fw->ucode_capa.n_scan_channels +
1481 sizeof(struct iwl_scan_probe_req);
1482 }
1483
1484 /*
1485 * This function is used in nic restart flow, to inform mac80211 about scans
1486 * that was aborted by restart flow or by an assert.
1487 */
1488 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1489 {
1490 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1491 int uid, i;
1492
1493 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1494 if (uid >= 0) {
1495 ieee80211_scan_completed(mvm->hw, true);
1496 mvm->scan_uid_status[uid] = 0;
1497 }
1498 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1499 if (uid >= 0 && !mvm->restart_fw) {
1500 ieee80211_sched_scan_stopped(mvm->hw);
1501 mvm->scan_uid_status[uid] = 0;
1502 }
1503
1504 /* We shouldn't have any UIDs still set. Loop over all the
1505 * UIDs to make sure there's nothing left there and warn if
1506 * any is found.
1507 */
1508 for (i = 0; i < mvm->max_scans; i++) {
1509 if (WARN_ONCE(mvm->scan_uid_status[i],
1510 "UMAC scan UID %d status was not cleaned\n",
1511 i))
1512 mvm->scan_uid_status[i] = 0;
1513 }
1514 } else {
1515 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1516 ieee80211_scan_completed(mvm->hw, true);
1517
1518 /* Sched scan will be restarted by mac80211 in
1519 * restart_hw, so do not report if FW is about to be
1520 * restarted.
1521 */
1522 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1523 ieee80211_sched_scan_stopped(mvm->hw);
1524 }
1525 }
1526
1527 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1528 {
1529 int ret;
1530
1531 if (!(mvm->scan_status & type))
1532 return 0;
1533
1534 if (iwl_mvm_is_radio_killed(mvm)) {
1535 ret = 0;
1536 goto out;
1537 }
1538
1539 ret = iwl_mvm_scan_stop_wait(mvm, type);
1540 if (!ret)
1541 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1542 out:
1543 /* Clear the scan status so the next scan requests will
1544 * succeed and mark the scan as stopping, so that the Rx
1545 * handler doesn't do anything, as the scan was stopped from
1546 * above.
1547 */
1548 mvm->scan_status &= ~type;
1549
1550 if (type == IWL_MVM_SCAN_REGULAR) {
1551 /* Since the rx handler won't do anything now, we have
1552 * to release the scan reference here.
1553 */
1554 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1555 if (notify)
1556 ieee80211_scan_completed(mvm->hw, true);
1557 } else if (notify) {
1558 ieee80211_sched_scan_stopped(mvm->hw);
1559 }
1560
1561 return ret;
1562 }
Linux kernel - Deliverables
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