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[mirror_ubuntu-bionic-kernel.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.
14 *
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
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
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
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
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 enum iwl_mvm_scan_type {
76 IWL_SCAN_TYPE_UNASSOC,
77 IWL_SCAN_TYPE_WILD,
78 IWL_SCAN_TYPE_MILD,
79 IWL_SCAN_TYPE_FRAGMENTED,
80 };
81
82 enum iwl_mvm_traffic_load {
83 IWL_MVM_TRAFFIC_LOW,
84 IWL_MVM_TRAFFIC_MEDIUM,
85 IWL_MVM_TRAFFIC_HIGH,
86 };
87
88 struct iwl_mvm_scan_timing_params {
89 u32 dwell_active;
90 u32 dwell_passive;
91 u32 dwell_fragmented;
92 u32 suspend_time;
93 u32 max_out_time;
94 };
95
96 static struct iwl_mvm_scan_timing_params scan_timing[] = {
97 [IWL_SCAN_TYPE_UNASSOC] = {
98 .dwell_active = 10,
99 .dwell_passive = 110,
100 .dwell_fragmented = 44,
101 .suspend_time = 0,
102 .max_out_time = 0,
103 },
104 [IWL_SCAN_TYPE_WILD] = {
105 .dwell_active = 10,
106 .dwell_passive = 110,
107 .dwell_fragmented = 44,
108 .suspend_time = 30,
109 .max_out_time = 120,
110 },
111 [IWL_SCAN_TYPE_MILD] = {
112 .dwell_active = 10,
113 .dwell_passive = 110,
114 .dwell_fragmented = 44,
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 u16 interval; /* interval between scans (in secs) */
135 u32 flags;
136 u8 *mac_addr;
137 u8 *mac_addr_mask;
138 bool no_cck;
139 bool pass_all;
140 int n_match_sets;
141 struct iwl_scan_probe_req preq;
142 struct cfg80211_match_set *match_sets;
143 u8 iterations[2];
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,
210 struct ieee80211_vif *vif,
211 struct iwl_mvm_scan_params *params)
212 {
213 int global_cnt = 0;
214 enum iwl_mvm_traffic_load load;
215 bool low_latency;
216
217 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
218 IEEE80211_IFACE_ITER_NORMAL,
219 iwl_mvm_scan_condition_iterator,
220 &global_cnt);
221 if (!global_cnt)
222 return IWL_SCAN_TYPE_UNASSOC;
223
224 load = iwl_mvm_get_traffic_load(mvm);
225 low_latency = iwl_mvm_low_latency(mvm);
226
227 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
228 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
229 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
230 return IWL_SCAN_TYPE_FRAGMENTED;
231
232 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
233 return IWL_SCAN_TYPE_MILD;
234
235 return IWL_SCAN_TYPE_WILD;
236 }
237
238 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
239 {
240 /* require rrm scan whenever the fw supports it */
241 return fw_has_capa(&mvm->fw->ucode_capa,
242 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
243 }
244
245 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
246 {
247 int max_probe_len;
248
249 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
250
251 /* we create the 802.11 header and SSID element */
252 max_probe_len -= 24 + 2;
253
254 /* DS parameter set element is added on 2.4GHZ band if required */
255 if (iwl_mvm_rrm_scan_needed(mvm))
256 max_probe_len -= 3;
257
258 return max_probe_len;
259 }
260
261 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
262 {
263 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
264
265 /* TODO: [BUG] This function should return the maximum allowed size of
266 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
267 * in the same command. So the correct implementation of this function
268 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
269 * command has only 512 bytes and it would leave us with about 240
270 * bytes for scan IEs, which is clearly not enough. So meanwhile
271 * we will report an incorrect value. This may result in a failure to
272 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
273 * functions with -ENOBUFS, if a large enough probe will be provided.
274 */
275 return max_ie_len;
276 }
277
278 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
279 int num_res, u8 *buf, size_t buf_size)
280 {
281 int i;
282 u8 *pos = buf, *end = buf + buf_size;
283
284 for (i = 0; pos < end && i < num_res; i++)
285 pos += snprintf(pos, end - pos, " %u", res[i].channel);
286
287 /* terminate the string in case the buffer was too short */
288 *(buf + buf_size - 1) = '\0';
289
290 return buf;
291 }
292
293 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
294 struct iwl_rx_cmd_buffer *rxb)
295 {
296 struct iwl_rx_packet *pkt = rxb_addr(rxb);
297 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
298 u8 buf[256];
299
300 IWL_DEBUG_SCAN(mvm,
301 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
302 notif->status, notif->scanned_channels,
303 iwl_mvm_dump_channel_list(notif->results,
304 notif->scanned_channels, buf,
305 sizeof(buf)));
306 }
307
308 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
309 struct iwl_rx_cmd_buffer *rxb)
310 {
311 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
312 ieee80211_sched_scan_results(mvm->hw);
313 }
314
315 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
316 {
317 switch (status) {
318 case IWL_SCAN_EBS_SUCCESS:
319 return "successful";
320 case IWL_SCAN_EBS_INACTIVE:
321 return "inactive";
322 case IWL_SCAN_EBS_FAILED:
323 case IWL_SCAN_EBS_CHAN_NOT_FOUND:
324 default:
325 return "failed";
326 }
327 }
328
329 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
330 struct iwl_rx_cmd_buffer *rxb)
331 {
332 struct iwl_rx_packet *pkt = rxb_addr(rxb);
333 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
334 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
335
336 /* scan status must be locked for proper checking */
337 lockdep_assert_held(&mvm->mutex);
338
339 /* We first check if we were stopping a scan, in which case we
340 * just clear the stopping flag. Then we check if it was a
341 * firmware initiated stop, in which case we need to inform
342 * mac80211.
343 * Note that we can have a stopping and a running scan
344 * simultaneously, but we can't have two different types of
345 * scans stopping or running at the same time (since LMAC
346 * doesn't support it).
347 */
348
349 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
350 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
351
352 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
353 aborted ? "aborted" : "completed",
354 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
355 IWL_DEBUG_SCAN(mvm,
356 "Last line %d, Last iteration %d, Time after last iteration %d\n",
357 scan_notif->last_schedule_line,
358 scan_notif->last_schedule_iteration,
359 __le32_to_cpu(scan_notif->time_after_last_iter));
360
361 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
362 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
363 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
364 aborted ? "aborted" : "completed",
365 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
366
367 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
368 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
369 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
370
371 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
372 aborted ? "aborted" : "completed",
373 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
374 IWL_DEBUG_SCAN(mvm,
375 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
376 scan_notif->last_schedule_line,
377 scan_notif->last_schedule_iteration,
378 __le32_to_cpu(scan_notif->time_after_last_iter));
379
380 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
381 ieee80211_sched_scan_stopped(mvm->hw);
382 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
383 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
384 aborted ? "aborted" : "completed",
385 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
386
387 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
388 ieee80211_scan_completed(mvm->hw,
389 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
390 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
391 }
392
393 mvm->last_ebs_successful =
394 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
395 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
396 }
397
398 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
399 {
400 int i;
401
402 for (i = 0; i < PROBE_OPTION_MAX; i++) {
403 if (!ssid_list[i].len)
404 break;
405 if (ssid_list[i].len == ssid_len &&
406 !memcmp(ssid_list->ssid, ssid, ssid_len))
407 return i;
408 }
409 return -1;
410 }
411
412 /* We insert the SSIDs in an inverted order, because the FW will
413 * invert it back.
414 */
415 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
416 struct iwl_ssid_ie *ssids,
417 u32 *ssid_bitmap)
418 {
419 int i, j;
420 int index;
421
422 /*
423 * copy SSIDs from match list.
424 * iwl_config_sched_scan_profiles() uses the order of these ssids to
425 * config match list.
426 */
427 for (i = 0, j = params->n_match_sets - 1;
428 j >= 0 && i < PROBE_OPTION_MAX;
429 i++, j--) {
430 /* skip empty SSID matchsets */
431 if (!params->match_sets[j].ssid.ssid_len)
432 continue;
433 ssids[i].id = WLAN_EID_SSID;
434 ssids[i].len = params->match_sets[j].ssid.ssid_len;
435 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
436 ssids[i].len);
437 }
438
439 /* add SSIDs from scan SSID list */
440 *ssid_bitmap = 0;
441 for (j = params->n_ssids - 1;
442 j >= 0 && i < PROBE_OPTION_MAX;
443 i++, j--) {
444 index = iwl_ssid_exist(params->ssids[j].ssid,
445 params->ssids[j].ssid_len,
446 ssids);
447 if (index < 0) {
448 ssids[i].id = WLAN_EID_SSID;
449 ssids[i].len = params->ssids[j].ssid_len;
450 memcpy(ssids[i].ssid, params->ssids[j].ssid,
451 ssids[i].len);
452 *ssid_bitmap |= BIT(i);
453 } else {
454 *ssid_bitmap |= BIT(index);
455 }
456 }
457 }
458
459 static int
460 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
461 struct cfg80211_sched_scan_request *req)
462 {
463 struct iwl_scan_offload_profile *profile;
464 struct iwl_scan_offload_profile_cfg *profile_cfg;
465 struct iwl_scan_offload_blacklist *blacklist;
466 struct iwl_host_cmd cmd = {
467 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
468 .len[1] = sizeof(*profile_cfg),
469 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
470 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
471 };
472 int blacklist_len;
473 int i;
474 int ret;
475
476 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
477 return -EIO;
478
479 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
480 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
481 else
482 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
483
484 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
485 if (!blacklist)
486 return -ENOMEM;
487
488 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
489 if (!profile_cfg) {
490 ret = -ENOMEM;
491 goto free_blacklist;
492 }
493
494 cmd.data[0] = blacklist;
495 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
496 cmd.data[1] = profile_cfg;
497
498 /* No blacklist configuration */
499
500 profile_cfg->num_profiles = req->n_match_sets;
501 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
502 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
503 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
504 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
505 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
506
507 for (i = 0; i < req->n_match_sets; i++) {
508 profile = &profile_cfg->profiles[i];
509 profile->ssid_index = i;
510 /* Support any cipher and auth algorithm */
511 profile->unicast_cipher = 0xff;
512 profile->auth_alg = 0xff;
513 profile->network_type = IWL_NETWORK_TYPE_ANY;
514 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
515 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
516 }
517
518 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
519
520 ret = iwl_mvm_send_cmd(mvm, &cmd);
521 kfree(profile_cfg);
522 free_blacklist:
523 kfree(blacklist);
524
525 return ret;
526 }
527
528 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
529 struct cfg80211_sched_scan_request *req)
530 {
531 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
532 IWL_DEBUG_SCAN(mvm,
533 "Sending scheduled scan with filtering, n_match_sets %d\n",
534 req->n_match_sets);
535 return false;
536 }
537
538 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
539 return true;
540 }
541
542 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
543 {
544 int ret;
545 struct iwl_host_cmd cmd = {
546 .id = SCAN_OFFLOAD_ABORT_CMD,
547 };
548 u32 status;
549
550 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
551 if (ret)
552 return ret;
553
554 if (status != CAN_ABORT_STATUS) {
555 /*
556 * The scan abort will return 1 for success or
557 * 2 for "failure". A failure condition can be
558 * due to simply not being in an active scan which
559 * can occur if we send the scan abort before the
560 * microcode has notified us that a scan is completed.
561 */
562 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
563 ret = -ENOENT;
564 }
565
566 return ret;
567 }
568
569 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
570 struct iwl_scan_req_tx_cmd *tx_cmd,
571 bool no_cck)
572 {
573 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
574 TX_CMD_FLG_BT_DIS);
575 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
576 IEEE80211_BAND_2GHZ,
577 no_cck);
578 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
579
580 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
581 TX_CMD_FLG_BT_DIS);
582 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
583 IEEE80211_BAND_5GHZ,
584 no_cck);
585 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
586 }
587
588 static void
589 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
590 struct ieee80211_channel **channels,
591 int n_channels, u32 ssid_bitmap,
592 struct iwl_scan_req_lmac *cmd)
593 {
594 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
595 int i;
596
597 for (i = 0; i < n_channels; i++) {
598 channel_cfg[i].channel_num =
599 cpu_to_le16(channels[i]->hw_value);
600 channel_cfg[i].iter_count = cpu_to_le16(1);
601 channel_cfg[i].iter_interval = 0;
602 channel_cfg[i].flags =
603 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
604 ssid_bitmap);
605 }
606 }
607
608 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
609 size_t len, u8 *const pos)
610 {
611 static const u8 before_ds_params[] = {
612 WLAN_EID_SSID,
613 WLAN_EID_SUPP_RATES,
614 WLAN_EID_REQUEST,
615 WLAN_EID_EXT_SUPP_RATES,
616 };
617 size_t offs;
618 u8 *newpos = pos;
619
620 if (!iwl_mvm_rrm_scan_needed(mvm)) {
621 memcpy(newpos, ies, len);
622 return newpos + len;
623 }
624
625 offs = ieee80211_ie_split(ies, len,
626 before_ds_params,
627 ARRAY_SIZE(before_ds_params),
628 0);
629
630 memcpy(newpos, ies, offs);
631 newpos += offs;
632
633 /* Add a placeholder for DS Parameter Set element */
634 *newpos++ = WLAN_EID_DS_PARAMS;
635 *newpos++ = 1;
636 *newpos++ = 0;
637
638 memcpy(newpos, ies + offs, len - offs);
639 newpos += len - offs;
640
641 return newpos;
642 }
643
644 static void
645 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
646 struct ieee80211_scan_ies *ies,
647 struct iwl_mvm_scan_params *params)
648 {
649 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
650 u8 *pos, *newpos;
651 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
652 params->mac_addr : NULL;
653
654 /*
655 * Unfortunately, right now the offload scan doesn't support randomising
656 * within the firmware, so until the firmware API is ready we implement
657 * it in the driver. This means that the scan iterations won't really be
658 * random, only when it's restarted, but at least that helps a bit.
659 */
660 if (mac_addr)
661 get_random_mask_addr(frame->sa, mac_addr,
662 params->mac_addr_mask);
663 else
664 memcpy(frame->sa, vif->addr, ETH_ALEN);
665
666 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
667 eth_broadcast_addr(frame->da);
668 eth_broadcast_addr(frame->bssid);
669 frame->seq_ctrl = 0;
670
671 pos = frame->u.probe_req.variable;
672 *pos++ = WLAN_EID_SSID;
673 *pos++ = 0;
674
675 params->preq.mac_header.offset = 0;
676 params->preq.mac_header.len = cpu_to_le16(24 + 2);
677
678 /* Insert ds parameter set element on 2.4 GHz band */
679 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
680 ies->ies[IEEE80211_BAND_2GHZ],
681 ies->len[IEEE80211_BAND_2GHZ],
682 pos);
683 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
684 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
685 pos = newpos;
686
687 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
688 ies->len[IEEE80211_BAND_5GHZ]);
689 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
690 params->preq.band_data[1].len =
691 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
692 pos += ies->len[IEEE80211_BAND_5GHZ];
693
694 memcpy(pos, ies->common_ies, ies->common_ie_len);
695 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
696 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
697 }
698
699 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm,
700 enum iwl_scan_priority_ext prio)
701 {
702 if (fw_has_api(&mvm->fw->ucode_capa,
703 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY))
704 return cpu_to_le32(prio);
705
706 if (prio <= IWL_SCAN_PRIORITY_EXT_2)
707 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
708
709 if (prio <= IWL_SCAN_PRIORITY_EXT_4)
710 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
711
712 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
713 }
714
715 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
716 struct iwl_scan_req_lmac *cmd,
717 struct iwl_mvm_scan_params *params)
718 {
719 cmd->active_dwell = scan_timing[params->type].dwell_active;
720 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
721 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
722 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
723 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
724 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
725 }
726
727 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
728 struct ieee80211_scan_ies *ies,
729 int n_channels)
730 {
731 return ((n_ssids <= PROBE_OPTION_MAX) &&
732 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
733 (ies->common_ie_len +
734 ies->len[NL80211_BAND_2GHZ] +
735 ies->len[NL80211_BAND_5GHZ] <=
736 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
737 }
738
739 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
740 struct ieee80211_vif *vif,
741 int n_iterations)
742 {
743 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
744
745 /* We can only use EBS if:
746 * 1. the feature is supported;
747 * 2. the last EBS was successful;
748 * 3. if only single scan, the single scan EBS API is supported;
749 * 4. it's not a p2p find operation.
750 */
751 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
752 mvm->last_ebs_successful &&
753 (n_iterations > 1 ||
754 fw_has_api(capa, IWL_UCODE_TLV_API_SINGLE_SCAN_EBS)) &&
755 vif->type != NL80211_IFTYPE_P2P_DEVICE);
756 }
757
758 static int iwl_mvm_scan_total_iterations(struct iwl_mvm_scan_params *params)
759 {
760 return params->iterations[0] + params->iterations[1];
761 }
762
763 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
764 struct iwl_mvm_scan_params *params)
765 {
766 int flags = 0;
767
768 if (params->n_ssids == 0)
769 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
770
771 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
772 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
773
774 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
775 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
776
777 if (iwl_mvm_rrm_scan_needed(mvm))
778 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
779
780 if (params->pass_all)
781 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
782 else
783 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
784
785 #ifdef CONFIG_IWLWIFI_DEBUGFS
786 if (mvm->scan_iter_notif_enabled)
787 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
788 #endif
789
790 return flags;
791 }
792
793 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
794 struct iwl_mvm_scan_params *params)
795 {
796 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
797 struct iwl_scan_probe_req *preq =
798 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
799 mvm->fw->ucode_capa.n_scan_channels);
800 u32 ssid_bitmap = 0;
801 int n_iterations = iwl_mvm_scan_total_iterations(params);
802
803 lockdep_assert_held(&mvm->mutex);
804
805 memset(cmd, 0, ksize(cmd));
806
807 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
808
809 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
810 cmd->iter_num = cpu_to_le32(1);
811 cmd->n_channels = (u8)params->n_channels;
812
813 cmd->delay = cpu_to_le32(params->delay);
814
815 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params));
816
817 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
818 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
819 MAC_FILTER_IN_BEACON);
820 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
821 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
822
823 /* this API uses bits 1-20 instead of 0-19 */
824 ssid_bitmap <<= 1;
825
826 cmd->schedule[0].delay = cpu_to_le16(params->interval);
827 cmd->schedule[0].iterations = params->iterations[0];
828 cmd->schedule[0].full_scan_mul = 1;
829 cmd->schedule[1].delay = cpu_to_le16(params->interval);
830 cmd->schedule[1].iterations = params->iterations[1];
831 cmd->schedule[1].full_scan_mul = 1;
832
833 if (iwl_mvm_scan_use_ebs(mvm, vif, n_iterations)) {
834 cmd->channel_opt[0].flags =
835 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
836 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
837 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
838 cmd->channel_opt[0].non_ebs_ratio =
839 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
840 cmd->channel_opt[1].flags =
841 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
842 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
843 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
844 cmd->channel_opt[1].non_ebs_ratio =
845 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
846 }
847
848 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
849 params->n_channels, ssid_bitmap, cmd);
850
851 *preq = params->preq;
852
853 return 0;
854 }
855
856 static int rate_to_scan_rate_flag(unsigned int rate)
857 {
858 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
859 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
860 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
861 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
862 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
863 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
864 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
865 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
866 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
867 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
868 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
869 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
870 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
871 };
872
873 return rate_to_scan_rate[rate];
874 }
875
876 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
877 {
878 struct ieee80211_supported_band *band;
879 unsigned int rates = 0;
880 int i;
881
882 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
883 for (i = 0; i < band->n_bitrates; i++)
884 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
885 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
886 for (i = 0; i < band->n_bitrates; i++)
887 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
888
889 /* Set both basic rates and supported rates */
890 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
891
892 return cpu_to_le32(rates);
893 }
894
895 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
896 {
897
898 struct iwl_scan_config *scan_config;
899 struct ieee80211_supported_band *band;
900 int num_channels =
901 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
902 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
903 int ret, i, j = 0, cmd_size;
904 struct iwl_host_cmd cmd = {
905 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
906 };
907
908 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
909 return -ENOBUFS;
910
911 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
912
913 scan_config = kzalloc(cmd_size, GFP_KERNEL);
914 if (!scan_config)
915 return -ENOMEM;
916
917 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
918 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
919 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
920 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
921 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
922 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
923 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
924 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
925 SCAN_CONFIG_N_CHANNELS(num_channels));
926 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
927 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
928 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
929 scan_config->out_of_channel_time = cpu_to_le32(170);
930 scan_config->suspend_time = cpu_to_le32(30);
931 scan_config->dwell_active = 20;
932 scan_config->dwell_passive = 110;
933 scan_config->dwell_fragmented = 20;
934
935 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
936
937 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
938 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
939 IWL_CHANNEL_FLAG_ACCURATE_EBS |
940 IWL_CHANNEL_FLAG_EBS_ADD |
941 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
942
943 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
944 for (i = 0; i < band->n_channels; i++, j++)
945 scan_config->channel_array[j] = band->channels[i].hw_value;
946 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
947 for (i = 0; i < band->n_channels; i++, j++)
948 scan_config->channel_array[j] = band->channels[i].hw_value;
949
950 cmd.data[0] = scan_config;
951 cmd.len[0] = cmd_size;
952 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
953
954 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
955
956 ret = iwl_mvm_send_cmd(mvm, &cmd);
957
958 kfree(scan_config);
959 return ret;
960 }
961
962 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
963 {
964 int i;
965
966 for (i = 0; i < mvm->max_scans; i++)
967 if (mvm->scan_uid_status[i] == status)
968 return i;
969
970 return -ENOENT;
971 }
972
973 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
974 struct iwl_scan_req_umac *cmd,
975 struct iwl_mvm_scan_params *params)
976 {
977 cmd->active_dwell = scan_timing[params->type].dwell_active;
978 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
979 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
980 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
981 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
982 cmd->scan_priority =
983 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
984
985 if (iwl_mvm_scan_total_iterations(params) == 1)
986 cmd->ooc_priority =
987 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
988 else
989 cmd->ooc_priority =
990 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
991 }
992
993 static void
994 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
995 struct ieee80211_channel **channels,
996 int n_channels, u32 ssid_bitmap,
997 struct iwl_scan_req_umac *cmd)
998 {
999 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1000 int i;
1001
1002 for (i = 0; i < n_channels; i++) {
1003 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1004 channel_cfg[i].channel_num = channels[i]->hw_value;
1005 channel_cfg[i].iter_count = 1;
1006 channel_cfg[i].iter_interval = 0;
1007 }
1008 }
1009
1010 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1011 struct iwl_mvm_scan_params *params)
1012 {
1013 int flags = 0;
1014
1015 if (params->n_ssids == 0)
1016 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1017
1018 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1019 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1020
1021 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1022 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1023
1024 if (iwl_mvm_rrm_scan_needed(mvm))
1025 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1026
1027 if (params->pass_all)
1028 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1029 else
1030 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1031
1032 if (iwl_mvm_scan_total_iterations(params) > 1)
1033 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1034
1035 #ifdef CONFIG_IWLWIFI_DEBUGFS
1036 if (mvm->scan_iter_notif_enabled)
1037 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1038 #endif
1039 return flags;
1040 }
1041
1042 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1043 struct iwl_mvm_scan_params *params,
1044 int type)
1045 {
1046 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1047 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1048 sizeof(struct iwl_scan_channel_cfg_umac) *
1049 mvm->fw->ucode_capa.n_scan_channels;
1050 int uid;
1051 u32 ssid_bitmap = 0;
1052 int n_iterations = iwl_mvm_scan_total_iterations(params);
1053
1054 lockdep_assert_held(&mvm->mutex);
1055
1056 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1057 if (uid < 0)
1058 return uid;
1059
1060 memset(cmd, 0, ksize(cmd));
1061
1062 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1063
1064 mvm->scan_uid_status[uid] = type;
1065
1066 cmd->uid = cpu_to_le32(uid);
1067 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params));
1068
1069 if (type == IWL_MVM_SCAN_SCHED)
1070 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1071
1072 if (iwl_mvm_scan_use_ebs(mvm, vif, n_iterations))
1073 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1074 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1075 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1076
1077 cmd->n_channels = params->n_channels;
1078
1079 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1080
1081 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1082 params->n_channels, ssid_bitmap, cmd);
1083
1084 /* With UMAC we use only one schedule for now, so use the sum
1085 * of the iterations (with a a maximum of 255).
1086 */
1087 sec_part->schedule[0].iter_count =
1088 (n_iterations > 255) ? 255 : n_iterations;
1089 sec_part->schedule[0].interval = cpu_to_le16(params->interval);
1090
1091 sec_part->delay = cpu_to_le16(params->delay);
1092 sec_part->preq = params->preq;
1093
1094 return 0;
1095 }
1096
1097 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1098 {
1099 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1100 }
1101
1102 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1103 {
1104 /* This looks a bit arbitrary, but the idea is that if we run
1105 * out of possible simultaneous scans and the userspace is
1106 * trying to run a scan type that is already running, we
1107 * return -EBUSY. But if the userspace wants to start a
1108 * different type of scan, we stop the opposite type to make
1109 * space for the new request. The reason is backwards
1110 * compatibility with old wpa_supplicant that wouldn't stop a
1111 * scheduled scan before starting a normal scan.
1112 */
1113
1114 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1115 return 0;
1116
1117 /* Use a switch, even though this is a bitmask, so that more
1118 * than one bits set will fall in default and we will warn.
1119 */
1120 switch (type) {
1121 case IWL_MVM_SCAN_REGULAR:
1122 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1123 return -EBUSY;
1124 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1125 case IWL_MVM_SCAN_SCHED:
1126 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1127 return -EBUSY;
1128 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1129 case IWL_MVM_SCAN_NETDETECT:
1130 /* No need to stop anything for net-detect since the
1131 * firmware is restarted anyway. This way, any sched
1132 * scans that were running will be restarted when we
1133 * resume.
1134 */
1135 return 0;
1136 default:
1137 WARN_ON(1);
1138 break;
1139 }
1140
1141 return -EIO;
1142 }
1143
1144 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1145 struct cfg80211_scan_request *req,
1146 struct ieee80211_scan_ies *ies)
1147 {
1148 struct iwl_host_cmd hcmd = {
1149 .len = { iwl_mvm_scan_size(mvm), },
1150 .data = { mvm->scan_cmd, },
1151 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1152 };
1153 struct iwl_mvm_scan_params params = {};
1154 int ret;
1155
1156 lockdep_assert_held(&mvm->mutex);
1157
1158 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1159 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1160 return -EBUSY;
1161 }
1162
1163 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1164 if (ret)
1165 return ret;
1166
1167 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1168
1169 /* we should have failed registration if scan_cmd was NULL */
1170 if (WARN_ON(!mvm->scan_cmd))
1171 return -ENOMEM;
1172
1173 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1174 return -ENOBUFS;
1175
1176 params.n_ssids = req->n_ssids;
1177 params.flags = req->flags;
1178 params.n_channels = req->n_channels;
1179 params.delay = 0;
1180 params.interval = 0;
1181 params.ssids = req->ssids;
1182 params.channels = req->channels;
1183 params.mac_addr = req->mac_addr;
1184 params.mac_addr_mask = req->mac_addr_mask;
1185 params.no_cck = req->no_cck;
1186 params.pass_all = true;
1187 params.n_match_sets = 0;
1188 params.match_sets = NULL;
1189
1190 params.iterations[0] = 1;
1191 params.iterations[1] = 0;
1192
1193 params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
1194
1195 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1196
1197 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1198 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1199 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1200 IWL_MVM_SCAN_REGULAR);
1201 } else {
1202 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1203 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1204 }
1205
1206 if (ret)
1207 return ret;
1208
1209 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1210 if (!ret) {
1211 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1212 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1213 } else {
1214 /* If the scan failed, it usually means that the FW was unable
1215 * to allocate the time events. Warn on it, but maybe we
1216 * should try to send the command again with different params.
1217 */
1218 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1219 }
1220
1221 if (ret)
1222 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1223
1224 return ret;
1225 }
1226
1227 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1228 struct ieee80211_vif *vif,
1229 struct cfg80211_sched_scan_request *req,
1230 struct ieee80211_scan_ies *ies,
1231 int type)
1232 {
1233 struct iwl_host_cmd hcmd = {
1234 .len = { iwl_mvm_scan_size(mvm), },
1235 .data = { mvm->scan_cmd, },
1236 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1237 };
1238 struct iwl_mvm_scan_params params = {};
1239 int ret;
1240
1241 lockdep_assert_held(&mvm->mutex);
1242
1243 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1244 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1245 return -EBUSY;
1246 }
1247
1248 ret = iwl_mvm_check_running_scans(mvm, type);
1249 if (ret)
1250 return ret;
1251
1252 /* we should have failed registration if scan_cmd was NULL */
1253 if (WARN_ON(!mvm->scan_cmd))
1254 return -ENOMEM;
1255
1256 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1257 return -ENOBUFS;
1258
1259 params.n_ssids = req->n_ssids;
1260 params.flags = req->flags;
1261 params.n_channels = req->n_channels;
1262 params.ssids = req->ssids;
1263 params.channels = req->channels;
1264 params.mac_addr = req->mac_addr;
1265 params.mac_addr_mask = req->mac_addr_mask;
1266 params.no_cck = false;
1267 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1268 params.n_match_sets = req->n_match_sets;
1269 params.match_sets = req->match_sets;
1270
1271 params.iterations[0] = 0;
1272 params.iterations[1] = 0xff;
1273
1274 params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
1275
1276 if (req->interval > U16_MAX) {
1277 IWL_DEBUG_SCAN(mvm,
1278 "interval value is > 16-bits, set to max possible\n");
1279 params.interval = U16_MAX;
1280 } else {
1281 params.interval = req->interval / MSEC_PER_SEC;
1282 }
1283
1284 /* In theory, LMAC scans can handle a 32-bit delay, but since
1285 * waiting for over 18 hours to start the scan is a bit silly
1286 * and to keep it aligned with UMAC scans (which only support
1287 * 16-bit delays), trim it down to 16-bits.
1288 */
1289 if (req->delay > U16_MAX) {
1290 IWL_DEBUG_SCAN(mvm,
1291 "delay value is > 16-bits, set to max possible\n");
1292 params.delay = U16_MAX;
1293 } else {
1294 params.delay = req->delay;
1295 }
1296
1297 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1298 if (ret)
1299 return ret;
1300
1301 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1302
1303 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1304 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1305 ret = iwl_mvm_scan_umac(mvm, vif, &params, IWL_MVM_SCAN_SCHED);
1306 } else {
1307 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1308 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1309 }
1310
1311 if (ret)
1312 return ret;
1313
1314 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1315 if (!ret) {
1316 IWL_DEBUG_SCAN(mvm,
1317 "Sched scan request was sent successfully\n");
1318 mvm->scan_status |= type;
1319 } else {
1320 /* If the scan failed, it usually means that the FW was unable
1321 * to allocate the time events. Warn on it, but maybe we
1322 * should try to send the command again with different params.
1323 */
1324 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1325 }
1326
1327 return ret;
1328 }
1329
1330 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1331 struct iwl_rx_cmd_buffer *rxb)
1332 {
1333 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1334 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1335 u32 uid = __le32_to_cpu(notif->uid);
1336 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1337
1338 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1339 return;
1340
1341 /* if the scan is already stopping, we don't need to notify mac80211 */
1342 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1343 ieee80211_scan_completed(mvm->hw, aborted);
1344 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1345 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1346 ieee80211_sched_scan_stopped(mvm->hw);
1347 }
1348
1349 mvm->scan_status &= ~mvm->scan_uid_status[uid];
1350 IWL_DEBUG_SCAN(mvm,
1351 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1352 uid, mvm->scan_uid_status[uid],
1353 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1354 "completed" : "aborted",
1355 iwl_mvm_ebs_status_str(notif->ebs_status));
1356 IWL_DEBUG_SCAN(mvm,
1357 "Last line %d, Last iteration %d, Time from last iteration %d\n",
1358 notif->last_schedule, notif->last_iter,
1359 __le32_to_cpu(notif->time_from_last_iter));
1360
1361 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1362 notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1363 mvm->last_ebs_successful = false;
1364
1365 mvm->scan_uid_status[uid] = 0;
1366 }
1367
1368 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1369 struct iwl_rx_cmd_buffer *rxb)
1370 {
1371 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1372 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1373 u8 buf[256];
1374
1375 IWL_DEBUG_SCAN(mvm,
1376 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1377 notif->status, notif->scanned_channels,
1378 iwl_mvm_dump_channel_list(notif->results,
1379 notif->scanned_channels, buf,
1380 sizeof(buf)));
1381 }
1382
1383 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1384 {
1385 struct iwl_umac_scan_abort cmd = {};
1386 int uid, ret;
1387
1388 lockdep_assert_held(&mvm->mutex);
1389
1390 /* We should always get a valid index here, because we already
1391 * checked that this type of scan was running in the generic
1392 * code.
1393 */
1394 uid = iwl_mvm_scan_uid_by_status(mvm, type);
1395 if (WARN_ON_ONCE(uid < 0))
1396 return uid;
1397
1398 cmd.uid = cpu_to_le32(uid);
1399
1400 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1401
1402 ret = iwl_mvm_send_cmd_pdu(mvm,
1403 iwl_cmd_id(SCAN_ABORT_UMAC,
1404 IWL_ALWAYS_LONG_GROUP, 0),
1405 0, sizeof(cmd), &cmd);
1406 if (!ret)
1407 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1408
1409 return ret;
1410 }
1411
1412 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1413 {
1414 struct iwl_notification_wait wait_scan_done;
1415 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1416 SCAN_OFFLOAD_COMPLETE, };
1417 int ret;
1418
1419 lockdep_assert_held(&mvm->mutex);
1420
1421 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1422 scan_done_notif,
1423 ARRAY_SIZE(scan_done_notif),
1424 NULL, NULL);
1425
1426 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1427
1428 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1429 ret = iwl_mvm_umac_scan_abort(mvm, type);
1430 else
1431 ret = iwl_mvm_lmac_scan_abort(mvm);
1432
1433 if (ret) {
1434 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1435 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1436 return ret;
1437 }
1438
1439 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1440
1441 return ret;
1442 }
1443
1444 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1445 {
1446 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1447 return sizeof(struct iwl_scan_req_umac) +
1448 sizeof(struct iwl_scan_channel_cfg_umac) *
1449 mvm->fw->ucode_capa.n_scan_channels +
1450 sizeof(struct iwl_scan_req_umac_tail);
1451
1452 return sizeof(struct iwl_scan_req_lmac) +
1453 sizeof(struct iwl_scan_channel_cfg_lmac) *
1454 mvm->fw->ucode_capa.n_scan_channels +
1455 sizeof(struct iwl_scan_probe_req);
1456 }
1457
1458 /*
1459 * This function is used in nic restart flow, to inform mac80211 about scans
1460 * that was aborted by restart flow or by an assert.
1461 */
1462 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1463 {
1464 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1465 int uid, i;
1466
1467 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1468 if (uid >= 0) {
1469 ieee80211_scan_completed(mvm->hw, true);
1470 mvm->scan_uid_status[uid] = 0;
1471 }
1472 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1473 if (uid >= 0 && !mvm->restart_fw) {
1474 ieee80211_sched_scan_stopped(mvm->hw);
1475 mvm->scan_uid_status[uid] = 0;
1476 }
1477
1478 /* We shouldn't have any UIDs still set. Loop over all the
1479 * UIDs to make sure there's nothing left there and warn if
1480 * any is found.
1481 */
1482 for (i = 0; i < mvm->max_scans; i++) {
1483 if (WARN_ONCE(mvm->scan_uid_status[i],
1484 "UMAC scan UID %d status was not cleaned\n",
1485 i))
1486 mvm->scan_uid_status[i] = 0;
1487 }
1488 } else {
1489 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1490 ieee80211_scan_completed(mvm->hw, true);
1491
1492 /* Sched scan will be restarted by mac80211 in
1493 * restart_hw, so do not report if FW is about to be
1494 * restarted.
1495 */
1496 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1497 ieee80211_sched_scan_stopped(mvm->hw);
1498 }
1499 }
1500
1501 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1502 {
1503 int ret;
1504
1505 if (!(mvm->scan_status & type))
1506 return 0;
1507
1508 if (iwl_mvm_is_radio_killed(mvm)) {
1509 ret = 0;
1510 goto out;
1511 }
1512
1513 ret = iwl_mvm_scan_stop_wait(mvm, type);
1514 if (!ret)
1515 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1516 out:
1517 /* Clear the scan status so the next scan requests will
1518 * succeed and mark the scan as stopping, so that the Rx
1519 * handler doesn't do anything, as the scan was stopped from
1520 * above.
1521 */
1522 mvm->scan_status &= ~type;
1523
1524 if (type == IWL_MVM_SCAN_REGULAR) {
1525 /* Since the rx handler won't do anything now, we have
1526 * to release the scan reference here.
1527 */
1528 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1529 if (notify)
1530 ieee80211_scan_completed(mvm->hw, true);
1531 } else if (notify) {
1532 ieee80211_sched_scan_stopped(mvm->hw);
1533 }
1534
1535 return ret;
1536 }
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