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iwlwifi: mvm: add a scan timeout for regular scans
[linux/fpc-iii.git] / drivers / net / wireless / intel / iwlwifi / mvm / scan.c
blobc1d1be9c5d0171e980138cbc69f5d26cb3366a8e
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 Intel Deutschland GmbH
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
15 *
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24 * USA
25 *
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
28 *
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32 *
33 * BSD LICENSE
34 *
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 Intel Deutschland GmbH
38 * All rights reserved.
39 *
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41 * modification, are permitted provided that the following conditions
42 * are met:
43 *
44 * * Redistributions of source code must retain the above copyright
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48 * the documentation and/or other materials provided with the
49 * distribution.
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52 * from this software without specific prior written permission.
53 *
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
65 *
66 *****************************************************************************/
67
68 #include <linux/etherdevice.h>
69 #include <net/mac80211.h>
70
71 #include "mvm.h"
72 #include "fw-api-scan.h"
73 #include "iwl-io.h"
74
75 #define IWL_DENSE_EBS_SCAN_RATIO 5
76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
77
78 enum iwl_mvm_traffic_load {
79 IWL_MVM_TRAFFIC_LOW,
80 IWL_MVM_TRAFFIC_MEDIUM,
81 IWL_MVM_TRAFFIC_HIGH,
82 };
83
84 struct iwl_mvm_scan_timing_params {
85 u32 dwell_active;
86 u32 dwell_passive;
87 u32 dwell_fragmented;
88 u32 dwell_extended;
89 u32 suspend_time;
90 u32 max_out_time;
91 };
92
93 static struct iwl_mvm_scan_timing_params scan_timing[] = {
94 [IWL_SCAN_TYPE_UNASSOC] = {
95 .dwell_active = 10,
96 .dwell_passive = 110,
97 .dwell_fragmented = 44,
98 .dwell_extended = 90,
99 .suspend_time = 0,
100 .max_out_time = 0,
101 },
102 [IWL_SCAN_TYPE_WILD] = {
103 .dwell_active = 10,
104 .dwell_passive = 110,
105 .dwell_fragmented = 44,
106 .dwell_extended = 90,
107 .suspend_time = 30,
108 .max_out_time = 120,
109 },
110 [IWL_SCAN_TYPE_MILD] = {
111 .dwell_active = 10,
112 .dwell_passive = 110,
113 .dwell_fragmented = 44,
114 .dwell_extended = 90,
115 .suspend_time = 120,
116 .max_out_time = 120,
117 },
118 [IWL_SCAN_TYPE_FRAGMENTED] = {
119 .dwell_active = 10,
120 .dwell_passive = 110,
121 .dwell_fragmented = 44,
122 .suspend_time = 95,
123 .max_out_time = 44,
124 },
125 };
126
127 struct iwl_mvm_scan_params {
128 enum iwl_mvm_scan_type type;
129 u32 n_channels;
130 u16 delay;
131 int n_ssids;
132 struct cfg80211_ssid *ssids;
133 struct ieee80211_channel **channels;
134 u32 flags;
135 u8 *mac_addr;
136 u8 *mac_addr_mask;
137 bool no_cck;
138 bool pass_all;
139 int n_match_sets;
140 struct iwl_scan_probe_req preq;
141 struct cfg80211_match_set *match_sets;
142 int n_scan_plans;
143 struct cfg80211_sched_scan_plan *scan_plans;
144 };
145
146 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
147 {
148 if (mvm->scan_rx_ant != ANT_NONE)
149 return mvm->scan_rx_ant;
150 return iwl_mvm_get_valid_rx_ant(mvm);
151 }
152
153 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
154 {
155 u16 rx_chain;
156 u8 rx_ant;
157
158 rx_ant = iwl_mvm_scan_rx_ant(mvm);
159 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
160 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
161 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
162 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
163 return cpu_to_le16(rx_chain);
164 }
165
166 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
167 {
168 if (band == IEEE80211_BAND_2GHZ)
169 return cpu_to_le32(PHY_BAND_24);
170 else
171 return cpu_to_le32(PHY_BAND_5);
172 }
173
174 static inline __le32
175 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
176 bool no_cck)
177 {
178 u32 tx_ant;
179
180 mvm->scan_last_antenna_idx =
181 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
182 mvm->scan_last_antenna_idx);
183 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
184
185 if (band == IEEE80211_BAND_2GHZ && !no_cck)
186 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
187 tx_ant);
188 else
189 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
190 }
191
192 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
193 struct ieee80211_vif *vif)
194 {
195 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
196 int *global_cnt = data;
197
198 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
199 mvmvif->phy_ctxt->id < MAX_PHYS)
200 *global_cnt += 1;
201 }
202
203 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
204 {
205 return IWL_MVM_TRAFFIC_LOW;
206 }
207
208 static enum
209 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
210 {
211 int global_cnt = 0;
212 enum iwl_mvm_traffic_load load;
213 bool low_latency;
214
215 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
216 IEEE80211_IFACE_ITER_NORMAL,
217 iwl_mvm_scan_condition_iterator,
218 &global_cnt);
219 if (!global_cnt)
220 return IWL_SCAN_TYPE_UNASSOC;
221
222 load = iwl_mvm_get_traffic_load(mvm);
223 low_latency = iwl_mvm_low_latency(mvm);
224
225 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
226 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
227 return IWL_SCAN_TYPE_FRAGMENTED;
228
229 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
230 return IWL_SCAN_TYPE_MILD;
231
232 return IWL_SCAN_TYPE_WILD;
233 }
234
235 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
236 {
237 /* require rrm scan whenever the fw supports it */
238 return fw_has_capa(&mvm->fw->ucode_capa,
239 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
240 }
241
242 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
243 {
244 int max_probe_len;
245
246 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
247
248 /* we create the 802.11 header and SSID element */
249 max_probe_len -= 24 + 2;
250
251 /* DS parameter set element is added on 2.4GHZ band if required */
252 if (iwl_mvm_rrm_scan_needed(mvm))
253 max_probe_len -= 3;
254
255 return max_probe_len;
256 }
257
258 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
259 {
260 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
261
262 /* TODO: [BUG] This function should return the maximum allowed size of
263 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
264 * in the same command. So the correct implementation of this function
265 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
266 * command has only 512 bytes and it would leave us with about 240
267 * bytes for scan IEs, which is clearly not enough. So meanwhile
268 * we will report an incorrect value. This may result in a failure to
269 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
270 * functions with -ENOBUFS, if a large enough probe will be provided.
271 */
272 return max_ie_len;
273 }
274
275 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
276 int num_res, u8 *buf, size_t buf_size)
277 {
278 int i;
279 u8 *pos = buf, *end = buf + buf_size;
280
281 for (i = 0; pos < end && i < num_res; i++)
282 pos += snprintf(pos, end - pos, " %u", res[i].channel);
283
284 /* terminate the string in case the buffer was too short */
285 *(buf + buf_size - 1) = '\0';
286
287 return buf;
288 }
289
290 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
291 struct iwl_rx_cmd_buffer *rxb)
292 {
293 struct iwl_rx_packet *pkt = rxb_addr(rxb);
294 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
295 u8 buf[256];
296
297 IWL_DEBUG_SCAN(mvm,
298 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
299 notif->status, notif->scanned_channels,
300 iwl_mvm_dump_channel_list(notif->results,
301 notif->scanned_channels, buf,
302 sizeof(buf)));
303
304 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
305 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
306 ieee80211_sched_scan_results(mvm->hw);
307 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
308 }
309 }
310
311 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
312 struct iwl_rx_cmd_buffer *rxb)
313 {
314 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
315 ieee80211_sched_scan_results(mvm->hw);
316 }
317
318 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
319 {
320 switch (status) {
321 case IWL_SCAN_EBS_SUCCESS:
322 return "successful";
323 case IWL_SCAN_EBS_INACTIVE:
324 return "inactive";
325 case IWL_SCAN_EBS_FAILED:
326 case IWL_SCAN_EBS_CHAN_NOT_FOUND:
327 default:
328 return "failed";
329 }
330 }
331
332 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
333 struct iwl_rx_cmd_buffer *rxb)
334 {
335 struct iwl_rx_packet *pkt = rxb_addr(rxb);
336 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
337 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
338
339 /* If this happens, the firmware has mistakenly sent an LMAC
340 * notification during UMAC scans -- warn and ignore it.
341 */
342 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
343 IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
344 return;
345
346 /* scan status must be locked for proper checking */
347 lockdep_assert_held(&mvm->mutex);
348
349 /* We first check if we were stopping a scan, in which case we
350 * just clear the stopping flag. Then we check if it was a
351 * firmware initiated stop, in which case we need to inform
352 * mac80211.
353 * Note that we can have a stopping and a running scan
354 * simultaneously, but we can't have two different types of
355 * scans stopping or running at the same time (since LMAC
356 * doesn't support it).
357 */
358
359 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
360 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
361
362 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
363 aborted ? "aborted" : "completed",
364 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
365 IWL_DEBUG_SCAN(mvm,
366 "Last line %d, Last iteration %d, Time after last iteration %d\n",
367 scan_notif->last_schedule_line,
368 scan_notif->last_schedule_iteration,
369 __le32_to_cpu(scan_notif->time_after_last_iter));
370
371 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
372 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
373 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
374 aborted ? "aborted" : "completed",
375 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
376
377 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
378 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
379 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
380
381 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
382 aborted ? "aborted" : "completed",
383 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
384 IWL_DEBUG_SCAN(mvm,
385 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
386 scan_notif->last_schedule_line,
387 scan_notif->last_schedule_iteration,
388 __le32_to_cpu(scan_notif->time_after_last_iter));
389
390 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
391 ieee80211_sched_scan_stopped(mvm->hw);
392 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
393 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
394 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
395 aborted ? "aborted" : "completed",
396 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
397
398 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
399 ieee80211_scan_completed(mvm->hw,
400 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
401 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
402 del_timer(&mvm->scan_timer);
403 } else {
404 IWL_ERR(mvm,
405 "got scan complete notification but no scan is running\n");
406 }
407
408 mvm->last_ebs_successful =
409 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
410 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
411 }
412
413 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
414 {
415 int i;
416
417 for (i = 0; i < PROBE_OPTION_MAX; i++) {
418 if (!ssid_list[i].len)
419 break;
420 if (ssid_list[i].len == ssid_len &&
421 !memcmp(ssid_list->ssid, ssid, ssid_len))
422 return i;
423 }
424 return -1;
425 }
426
427 /* We insert the SSIDs in an inverted order, because the FW will
428 * invert it back.
429 */
430 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
431 struct iwl_ssid_ie *ssids,
432 u32 *ssid_bitmap)
433 {
434 int i, j;
435 int index;
436
437 /*
438 * copy SSIDs from match list.
439 * iwl_config_sched_scan_profiles() uses the order of these ssids to
440 * config match list.
441 */
442 for (i = 0, j = params->n_match_sets - 1;
443 j >= 0 && i < PROBE_OPTION_MAX;
444 i++, j--) {
445 /* skip empty SSID matchsets */
446 if (!params->match_sets[j].ssid.ssid_len)
447 continue;
448 ssids[i].id = WLAN_EID_SSID;
449 ssids[i].len = params->match_sets[j].ssid.ssid_len;
450 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
451 ssids[i].len);
452 }
453
454 /* add SSIDs from scan SSID list */
455 *ssid_bitmap = 0;
456 for (j = params->n_ssids - 1;
457 j >= 0 && i < PROBE_OPTION_MAX;
458 i++, j--) {
459 index = iwl_ssid_exist(params->ssids[j].ssid,
460 params->ssids[j].ssid_len,
461 ssids);
462 if (index < 0) {
463 ssids[i].id = WLAN_EID_SSID;
464 ssids[i].len = params->ssids[j].ssid_len;
465 memcpy(ssids[i].ssid, params->ssids[j].ssid,
466 ssids[i].len);
467 *ssid_bitmap |= BIT(i);
468 } else {
469 *ssid_bitmap |= BIT(index);
470 }
471 }
472 }
473
474 static int
475 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
476 struct cfg80211_sched_scan_request *req)
477 {
478 struct iwl_scan_offload_profile *profile;
479 struct iwl_scan_offload_profile_cfg *profile_cfg;
480 struct iwl_scan_offload_blacklist *blacklist;
481 struct iwl_host_cmd cmd = {
482 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
483 .len[1] = sizeof(*profile_cfg),
484 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
485 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
486 };
487 int blacklist_len;
488 int i;
489 int ret;
490
491 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
492 return -EIO;
493
494 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
495 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
496 else
497 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
498
499 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
500 if (!blacklist)
501 return -ENOMEM;
502
503 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
504 if (!profile_cfg) {
505 ret = -ENOMEM;
506 goto free_blacklist;
507 }
508
509 cmd.data[0] = blacklist;
510 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
511 cmd.data[1] = profile_cfg;
512
513 /* No blacklist configuration */
514
515 profile_cfg->num_profiles = req->n_match_sets;
516 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
517 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
518 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
519 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
520 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
521
522 for (i = 0; i < req->n_match_sets; i++) {
523 profile = &profile_cfg->profiles[i];
524 profile->ssid_index = i;
525 /* Support any cipher and auth algorithm */
526 profile->unicast_cipher = 0xff;
527 profile->auth_alg = 0xff;
528 profile->network_type = IWL_NETWORK_TYPE_ANY;
529 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
530 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
531 }
532
533 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
534
535 ret = iwl_mvm_send_cmd(mvm, &cmd);
536 kfree(profile_cfg);
537 free_blacklist:
538 kfree(blacklist);
539
540 return ret;
541 }
542
543 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
544 struct cfg80211_sched_scan_request *req)
545 {
546 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
547 IWL_DEBUG_SCAN(mvm,
548 "Sending scheduled scan with filtering, n_match_sets %d\n",
549 req->n_match_sets);
550 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
551 return false;
552 }
553
554 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
555
556 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
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 (fw_has_api(&mvm->fw->ucode_capa,
721 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY))
722 return cpu_to_le32(prio);
723
724 if (prio <= IWL_SCAN_PRIORITY_EXT_2)
725 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
726
727 if (prio <= IWL_SCAN_PRIORITY_EXT_4)
728 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
729
730 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
731 }
732
733 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
734 struct iwl_scan_req_lmac *cmd,
735 struct iwl_mvm_scan_params *params)
736 {
737 cmd->active_dwell = scan_timing[params->type].dwell_active;
738 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
739 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
740 cmd->extended_dwell = scan_timing[params->type].dwell_extended;
741 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
742 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].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,
759 struct ieee80211_vif *vif)
760 {
761 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
762
763 /* We can only use EBS if:
764 * 1. the feature is supported;
765 * 2. the last EBS was successful;
766 * 3. if only single scan, the single scan EBS API is supported;
767 * 4. it's not a p2p find operation.
768 */
769 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
770 mvm->last_ebs_successful &&
771 vif->type != NL80211_IFTYPE_P2P_DEVICE);
772 }
773
774 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
775 {
776 return params->n_scan_plans == 1 &&
777 params->scan_plans[0].iterations == 1;
778 }
779
780 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
781 struct iwl_mvm_scan_params *params,
782 struct ieee80211_vif *vif)
783 {
784 int flags = 0;
785
786 if (params->n_ssids == 0)
787 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
788
789 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
790 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
791
792 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
793 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
794
795 if (iwl_mvm_rrm_scan_needed(mvm))
796 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
797
798 if (params->pass_all)
799 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
800 else
801 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
802
803 #ifdef CONFIG_IWLWIFI_DEBUGFS
804 if (mvm->scan_iter_notif_enabled)
805 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
806 #endif
807
808 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
809 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
810
811 if (iwl_mvm_is_regular_scan(params) &&
812 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
813 params->type != IWL_SCAN_TYPE_FRAGMENTED)
814 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
815
816 return flags;
817 }
818
819 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
820 struct iwl_mvm_scan_params *params)
821 {
822 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
823 struct iwl_scan_probe_req *preq =
824 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
825 mvm->fw->ucode_capa.n_scan_channels);
826 u32 ssid_bitmap = 0;
827 int i;
828
829 lockdep_assert_held(&mvm->mutex);
830
831 memset(cmd, 0, ksize(cmd));
832
833 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
834 return -EINVAL;
835
836 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
837
838 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
839 cmd->iter_num = cpu_to_le32(1);
840 cmd->n_channels = (u8)params->n_channels;
841
842 cmd->delay = cpu_to_le32(params->delay);
843
844 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
845 vif));
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 for (i = 0; i < params->n_scan_plans; i++) {
857 struct cfg80211_sched_scan_plan *scan_plan =
858 &params->scan_plans[i];
859
860 cmd->schedule[i].delay =
861 cpu_to_le16(scan_plan->interval);
862 cmd->schedule[i].iterations = scan_plan->iterations;
863 cmd->schedule[i].full_scan_mul = 1;
864 }
865
866 /*
867 * If the number of iterations of the last scan plan is set to
868 * zero, it should run infinitely. However, this is not always the case.
869 * For example, when regular scan is requested the driver sets one scan
870 * plan with one iteration.
871 */
872 if (!cmd->schedule[i - 1].iterations)
873 cmd->schedule[i - 1].iterations = 0xff;
874
875 if (iwl_mvm_scan_use_ebs(mvm, vif)) {
876 cmd->channel_opt[0].flags =
877 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
878 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
879 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
880 cmd->channel_opt[0].non_ebs_ratio =
881 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
882 cmd->channel_opt[1].flags =
883 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
884 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
885 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
886 cmd->channel_opt[1].non_ebs_ratio =
887 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
888 }
889
890 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
891 params->n_channels, ssid_bitmap, cmd);
892
893 *preq = params->preq;
894
895 return 0;
896 }
897
898 static int rate_to_scan_rate_flag(unsigned int rate)
899 {
900 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
901 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
902 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
903 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
904 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
905 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
906 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
907 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
908 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
909 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
910 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
911 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
912 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
913 };
914
915 return rate_to_scan_rate[rate];
916 }
917
918 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
919 {
920 struct ieee80211_supported_band *band;
921 unsigned int rates = 0;
922 int i;
923
924 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
925 for (i = 0; i < band->n_bitrates; i++)
926 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
927 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
928 for (i = 0; i < band->n_bitrates; i++)
929 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
930
931 /* Set both basic rates and supported rates */
932 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
933
934 return cpu_to_le32(rates);
935 }
936
937 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
938 {
939 struct iwl_scan_config *scan_config;
940 struct ieee80211_supported_band *band;
941 int num_channels =
942 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
943 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
944 int ret, i, j = 0, cmd_size;
945 struct iwl_host_cmd cmd = {
946 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
947 };
948 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
949
950 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
951 return -ENOBUFS;
952
953 if (type == mvm->scan_type) {
954 IWL_DEBUG_SCAN(mvm,
955 "Ignoring UMAC scan config of the same type\n");
956 return 0;
957 }
958
959 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
960
961 scan_config = kzalloc(cmd_size, GFP_KERNEL);
962 if (!scan_config)
963 return -ENOMEM;
964
965 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
966 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
967 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
968 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
969 SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
970 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
971 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
972 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
973 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
974 SCAN_CONFIG_N_CHANNELS(num_channels) |
975 (type == IWL_SCAN_TYPE_FRAGMENTED ?
976 SCAN_CONFIG_FLAG_SET_FRAGMENTED :
977 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
978 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
979 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
980 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
981 scan_config->out_of_channel_time =
982 cpu_to_le32(scan_timing[type].max_out_time);
983 scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
984 scan_config->dwell_active = scan_timing[type].dwell_active;
985 scan_config->dwell_passive = scan_timing[type].dwell_passive;
986 scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
987 scan_config->dwell_extended = scan_timing[type].dwell_extended;
988
989 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
990
991 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
992 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
993 IWL_CHANNEL_FLAG_ACCURATE_EBS |
994 IWL_CHANNEL_FLAG_EBS_ADD |
995 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
996
997 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
998 for (i = 0; i < band->n_channels; i++, j++)
999 scan_config->channel_array[j] = band->channels[i].hw_value;
1000 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1001 for (i = 0; i < band->n_channels; i++, j++)
1002 scan_config->channel_array[j] = band->channels[i].hw_value;
1003
1004 cmd.data[0] = scan_config;
1005 cmd.len[0] = cmd_size;
1006 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1007
1008 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1009
1010 ret = iwl_mvm_send_cmd(mvm, &cmd);
1011 if (!ret)
1012 mvm->scan_type = type;
1013
1014 kfree(scan_config);
1015 return ret;
1016 }
1017
1018 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1019 {
1020 int i;
1021
1022 for (i = 0; i < mvm->max_scans; i++)
1023 if (mvm->scan_uid_status[i] == status)
1024 return i;
1025
1026 return -ENOENT;
1027 }
1028
1029 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1030 struct iwl_scan_req_umac *cmd,
1031 struct iwl_mvm_scan_params *params)
1032 {
1033 cmd->extended_dwell = scan_timing[params->type].dwell_extended;
1034 cmd->active_dwell = scan_timing[params->type].dwell_active;
1035 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
1036 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
1037 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
1038 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
1039 cmd->scan_priority =
1040 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1041
1042 if (iwl_mvm_is_regular_scan(params))
1043 cmd->ooc_priority =
1044 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1045 else
1046 cmd->ooc_priority =
1047 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
1048 }
1049
1050 static void
1051 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1052 struct ieee80211_channel **channels,
1053 int n_channels, u32 ssid_bitmap,
1054 struct iwl_scan_req_umac *cmd)
1055 {
1056 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1057 int i;
1058
1059 for (i = 0; i < n_channels; i++) {
1060 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1061 channel_cfg[i].channel_num = channels[i]->hw_value;
1062 channel_cfg[i].iter_count = 1;
1063 channel_cfg[i].iter_interval = 0;
1064 }
1065 }
1066
1067 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1068 struct iwl_mvm_scan_params *params,
1069 struct ieee80211_vif *vif)
1070 {
1071 int flags = 0;
1072
1073 if (params->n_ssids == 0)
1074 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1075
1076 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1077 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1078
1079 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1080 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1081
1082 if (iwl_mvm_rrm_scan_needed(mvm))
1083 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1084
1085 if (params->pass_all)
1086 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1087 else
1088 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1089
1090 if (!iwl_mvm_is_regular_scan(params))
1091 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1092
1093 #ifdef CONFIG_IWLWIFI_DEBUGFS
1094 if (mvm->scan_iter_notif_enabled)
1095 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1096 #endif
1097
1098 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1099 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1100
1101 if (iwl_mvm_is_regular_scan(params) &&
1102 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1103 params->type != IWL_SCAN_TYPE_FRAGMENTED)
1104 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1105
1106 return flags;
1107 }
1108
1109 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1110 struct iwl_mvm_scan_params *params,
1111 int type)
1112 {
1113 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1114 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1115 sizeof(struct iwl_scan_channel_cfg_umac) *
1116 mvm->fw->ucode_capa.n_scan_channels;
1117 int uid, i;
1118 u32 ssid_bitmap = 0;
1119
1120 lockdep_assert_held(&mvm->mutex);
1121
1122 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1123 return -EINVAL;
1124
1125 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1126 if (uid < 0)
1127 return uid;
1128
1129 memset(cmd, 0, ksize(cmd));
1130
1131 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1132
1133 mvm->scan_uid_status[uid] = type;
1134
1135 cmd->uid = cpu_to_le32(uid);
1136 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params,
1137 vif));
1138
1139 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1140 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1141
1142 if (iwl_mvm_scan_use_ebs(mvm, vif))
1143 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1144 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1145 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1146
1147 cmd->n_channels = params->n_channels;
1148
1149 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1150
1151 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1152 params->n_channels, ssid_bitmap, cmd);
1153
1154 for (i = 0; i < params->n_scan_plans; i++) {
1155 struct cfg80211_sched_scan_plan *scan_plan =
1156 &params->scan_plans[i];
1157
1158 sec_part->schedule[i].iter_count = scan_plan->iterations;
1159 sec_part->schedule[i].interval =
1160 cpu_to_le16(scan_plan->interval);
1161 }
1162
1163 /*
1164 * If the number of iterations of the last scan plan is set to
1165 * zero, it should run infinitely. However, this is not always the case.
1166 * For example, when regular scan is requested the driver sets one scan
1167 * plan with one iteration.
1168 */
1169 if (!sec_part->schedule[i - 1].iter_count)
1170 sec_part->schedule[i - 1].iter_count = 0xff;
1171
1172 sec_part->delay = cpu_to_le16(params->delay);
1173 sec_part->preq = params->preq;
1174
1175 return 0;
1176 }
1177
1178 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1179 {
1180 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1181 }
1182
1183 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1184 {
1185 /* This looks a bit arbitrary, but the idea is that if we run
1186 * out of possible simultaneous scans and the userspace is
1187 * trying to run a scan type that is already running, we
1188 * return -EBUSY. But if the userspace wants to start a
1189 * different type of scan, we stop the opposite type to make
1190 * space for the new request. The reason is backwards
1191 * compatibility with old wpa_supplicant that wouldn't stop a
1192 * scheduled scan before starting a normal scan.
1193 */
1194
1195 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1196 return 0;
1197
1198 /* Use a switch, even though this is a bitmask, so that more
1199 * than one bits set will fall in default and we will warn.
1200 */
1201 switch (type) {
1202 case IWL_MVM_SCAN_REGULAR:
1203 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1204 return -EBUSY;
1205 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1206 case IWL_MVM_SCAN_SCHED:
1207 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1208 return -EBUSY;
1209 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1210 case IWL_MVM_SCAN_NETDETECT:
1211 /* No need to stop anything for net-detect since the
1212 * firmware is restarted anyway. This way, any sched
1213 * scans that were running will be restarted when we
1214 * resume.
1215 */
1216 return 0;
1217 default:
1218 WARN_ON(1);
1219 break;
1220 }
1221
1222 return -EIO;
1223 }
1224
1225 #define SCAN_TIMEOUT (16 * HZ)
1226
1227 void iwl_mvm_scan_timeout(unsigned long data)
1228 {
1229 struct iwl_mvm *mvm = (struct iwl_mvm *)data;
1230
1231 IWL_ERR(mvm, "regular scan timed out\n");
1232
1233 del_timer(&mvm->scan_timer);
1234 iwl_force_nmi(mvm->trans);
1235 }
1236
1237 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1238 struct cfg80211_scan_request *req,
1239 struct ieee80211_scan_ies *ies)
1240 {
1241 struct iwl_host_cmd hcmd = {
1242 .len = { iwl_mvm_scan_size(mvm), },
1243 .data = { mvm->scan_cmd, },
1244 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1245 };
1246 struct iwl_mvm_scan_params params = {};
1247 int ret;
1248 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1249
1250 lockdep_assert_held(&mvm->mutex);
1251
1252 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1253 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1254 return -EBUSY;
1255 }
1256
1257 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1258 if (ret)
1259 return ret;
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.ssids = req->ssids;
1273 params.channels = req->channels;
1274 params.mac_addr = req->mac_addr;
1275 params.mac_addr_mask = req->mac_addr_mask;
1276 params.no_cck = req->no_cck;
1277 params.pass_all = true;
1278 params.n_match_sets = 0;
1279 params.match_sets = NULL;
1280
1281 params.scan_plans = &scan_plan;
1282 params.n_scan_plans = 1;
1283
1284 params.type =
1285 iwl_mvm_get_scan_type(mvm,
1286 vif->type == NL80211_IFTYPE_P2P_DEVICE);
1287
1288 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1289
1290 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1291 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1292 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1293 IWL_MVM_SCAN_REGULAR);
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 /* If the scan failed, it usually means that the FW was unable
1305 * to allocate the time events. Warn on it, but maybe we
1306 * should try to send the command again with different params.
1307 */
1308 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1309 return ret;
1310 }
1311
1312 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1313 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1314 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1315
1316 mod_timer(&mvm->scan_timer, jiffies + SCAN_TIMEOUT);
1317
1318 return 0;
1319 }
1320
1321 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1322 struct ieee80211_vif *vif,
1323 struct cfg80211_sched_scan_request *req,
1324 struct ieee80211_scan_ies *ies,
1325 int type)
1326 {
1327 struct iwl_host_cmd hcmd = {
1328 .len = { iwl_mvm_scan_size(mvm), },
1329 .data = { mvm->scan_cmd, },
1330 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1331 };
1332 struct iwl_mvm_scan_params params = {};
1333 int ret;
1334
1335 lockdep_assert_held(&mvm->mutex);
1336
1337 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1338 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1339 return -EBUSY;
1340 }
1341
1342 ret = iwl_mvm_check_running_scans(mvm, type);
1343 if (ret)
1344 return ret;
1345
1346 /* we should have failed registration if scan_cmd was NULL */
1347 if (WARN_ON(!mvm->scan_cmd))
1348 return -ENOMEM;
1349
1350 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1351 return -ENOBUFS;
1352
1353 params.n_ssids = req->n_ssids;
1354 params.flags = req->flags;
1355 params.n_channels = req->n_channels;
1356 params.ssids = req->ssids;
1357 params.channels = req->channels;
1358 params.mac_addr = req->mac_addr;
1359 params.mac_addr_mask = req->mac_addr_mask;
1360 params.no_cck = false;
1361 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1362 params.n_match_sets = req->n_match_sets;
1363 params.match_sets = req->match_sets;
1364 if (!req->n_scan_plans)
1365 return -EINVAL;
1366
1367 params.n_scan_plans = req->n_scan_plans;
1368 params.scan_plans = req->scan_plans;
1369
1370 params.type =
1371 iwl_mvm_get_scan_type(mvm,
1372 vif->type == NL80211_IFTYPE_P2P_DEVICE);
1373
1374 /* In theory, LMAC scans can handle a 32-bit delay, but since
1375 * waiting for over 18 hours to start the scan is a bit silly
1376 * and to keep it aligned with UMAC scans (which only support
1377 * 16-bit delays), trim it down to 16-bits.
1378 */
1379 if (req->delay > U16_MAX) {
1380 IWL_DEBUG_SCAN(mvm,
1381 "delay value is > 16-bits, set to max possible\n");
1382 params.delay = U16_MAX;
1383 } else {
1384 params.delay = req->delay;
1385 }
1386
1387 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1388 if (ret)
1389 return ret;
1390
1391 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1392
1393 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1394 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1395 ret = iwl_mvm_scan_umac(mvm, vif, &params, type);
1396 } else {
1397 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1398 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1399 }
1400
1401 if (ret)
1402 return ret;
1403
1404 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1405 if (!ret) {
1406 IWL_DEBUG_SCAN(mvm,
1407 "Sched scan request was sent successfully\n");
1408 mvm->scan_status |= type;
1409 } else {
1410 /* If the scan failed, it usually means that the FW was unable
1411 * to allocate the time events. Warn on it, but maybe we
1412 * should try to send the command again with different params.
1413 */
1414 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1415 }
1416
1417 return ret;
1418 }
1419
1420 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1421 struct iwl_rx_cmd_buffer *rxb)
1422 {
1423 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1424 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1425 u32 uid = __le32_to_cpu(notif->uid);
1426 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1427
1428 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1429 return;
1430
1431 /* if the scan is already stopping, we don't need to notify mac80211 */
1432 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1433 ieee80211_scan_completed(mvm->hw, aborted);
1434 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1435 del_timer(&mvm->scan_timer);
1436 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1437 ieee80211_sched_scan_stopped(mvm->hw);
1438 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1439 }
1440
1441 mvm->scan_status &= ~mvm->scan_uid_status[uid];
1442 IWL_DEBUG_SCAN(mvm,
1443 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1444 uid, mvm->scan_uid_status[uid],
1445 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1446 "completed" : "aborted",
1447 iwl_mvm_ebs_status_str(notif->ebs_status));
1448 IWL_DEBUG_SCAN(mvm,
1449 "Last line %d, Last iteration %d, Time from last iteration %d\n",
1450 notif->last_schedule, notif->last_iter,
1451 __le32_to_cpu(notif->time_from_last_iter));
1452
1453 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1454 notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1455 mvm->last_ebs_successful = false;
1456
1457 mvm->scan_uid_status[uid] = 0;
1458 }
1459
1460 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1461 struct iwl_rx_cmd_buffer *rxb)
1462 {
1463 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1464 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1465 u8 buf[256];
1466
1467 IWL_DEBUG_SCAN(mvm,
1468 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1469 notif->status, notif->scanned_channels,
1470 iwl_mvm_dump_channel_list(notif->results,
1471 notif->scanned_channels, buf,
1472 sizeof(buf)));
1473
1474 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1475 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1476 ieee80211_sched_scan_results(mvm->hw);
1477 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1478 }
1479 }
1480
1481 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1482 {
1483 struct iwl_umac_scan_abort cmd = {};
1484 int uid, ret;
1485
1486 lockdep_assert_held(&mvm->mutex);
1487
1488 /* We should always get a valid index here, because we already
1489 * checked that this type of scan was running in the generic
1490 * code.
1491 */
1492 uid = iwl_mvm_scan_uid_by_status(mvm, type);
1493 if (WARN_ON_ONCE(uid < 0))
1494 return uid;
1495
1496 cmd.uid = cpu_to_le32(uid);
1497
1498 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1499
1500 ret = iwl_mvm_send_cmd_pdu(mvm,
1501 iwl_cmd_id(SCAN_ABORT_UMAC,
1502 IWL_ALWAYS_LONG_GROUP, 0),
1503 0, sizeof(cmd), &cmd);
1504 if (!ret)
1505 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1506
1507 return ret;
1508 }
1509
1510 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1511 {
1512 struct iwl_notification_wait wait_scan_done;
1513 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1514 SCAN_OFFLOAD_COMPLETE, };
1515 int ret;
1516
1517 lockdep_assert_held(&mvm->mutex);
1518
1519 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1520 scan_done_notif,
1521 ARRAY_SIZE(scan_done_notif),
1522 NULL, NULL);
1523
1524 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1525
1526 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1527 ret = iwl_mvm_umac_scan_abort(mvm, type);
1528 else
1529 ret = iwl_mvm_lmac_scan_abort(mvm);
1530
1531 if (ret) {
1532 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1533 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1534 return ret;
1535 }
1536
1537 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1538
1539 return ret;
1540 }
1541
1542 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1543 {
1544 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1545 return sizeof(struct iwl_scan_req_umac) +
1546 sizeof(struct iwl_scan_channel_cfg_umac) *
1547 mvm->fw->ucode_capa.n_scan_channels +
1548 sizeof(struct iwl_scan_req_umac_tail);
1549
1550 return sizeof(struct iwl_scan_req_lmac) +
1551 sizeof(struct iwl_scan_channel_cfg_lmac) *
1552 mvm->fw->ucode_capa.n_scan_channels +
1553 sizeof(struct iwl_scan_probe_req);
1554 }
1555
1556 /*
1557 * This function is used in nic restart flow, to inform mac80211 about scans
1558 * that was aborted by restart flow or by an assert.
1559 */
1560 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1561 {
1562 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1563 int uid, i;
1564
1565 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1566 if (uid >= 0) {
1567 ieee80211_scan_completed(mvm->hw, true);
1568 mvm->scan_uid_status[uid] = 0;
1569 }
1570 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1571 if (uid >= 0 && !mvm->restart_fw) {
1572 ieee80211_sched_scan_stopped(mvm->hw);
1573 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1574 mvm->scan_uid_status[uid] = 0;
1575 }
1576
1577 /* We shouldn't have any UIDs still set. Loop over all the
1578 * UIDs to make sure there's nothing left there and warn if
1579 * any is found.
1580 */
1581 for (i = 0; i < mvm->max_scans; i++) {
1582 if (WARN_ONCE(mvm->scan_uid_status[i],
1583 "UMAC scan UID %d status was not cleaned\n",
1584 i))
1585 mvm->scan_uid_status[i] = 0;
1586 }
1587 } else {
1588 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1589 ieee80211_scan_completed(mvm->hw, true);
1590
1591 /* Sched scan will be restarted by mac80211 in
1592 * restart_hw, so do not report if FW is about to be
1593 * restarted.
1594 */
1595 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
1596 !mvm->restart_fw) {
1597 ieee80211_sched_scan_stopped(mvm->hw);
1598 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1599 }
1600 }
1601 }
1602
1603 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1604 {
1605 int ret;
1606
1607 if (!(mvm->scan_status & type))
1608 return 0;
1609
1610 if (iwl_mvm_is_radio_killed(mvm)) {
1611 ret = 0;
1612 goto out;
1613 }
1614
1615 ret = iwl_mvm_scan_stop_wait(mvm, type);
1616 if (!ret)
1617 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1618 out:
1619 /* Clear the scan status so the next scan requests will
1620 * succeed and mark the scan as stopping, so that the Rx
1621 * handler doesn't do anything, as the scan was stopped from
1622 * above.
1623 */
1624 mvm->scan_status &= ~type;
1625
1626 if (type == IWL_MVM_SCAN_REGULAR) {
1627 /* Since the rx handler won't do anything now, we have
1628 * to release the scan reference here.
1629 */
1630 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1631 del_timer(&mvm->scan_timer);
1632 if (notify)
1633 ieee80211_scan_completed(mvm->hw, true);
1634 } else if (notify) {
1635 ieee80211_sched_scan_stopped(mvm->hw);
1636 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1637 }
1638
1639 return ret;
1640 }
Linux with added FPC-III support