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[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
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 "iwl-eeprom-parse.h"
71 #include "fw-api-scan.h"
72
73 #define IWL_PLCP_QUIET_THRESH 1
74 #define IWL_ACTIVE_QUIET_TIME 10
75 #define IWL_DENSE_EBS_SCAN_RATIO 5
76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
77
78 struct iwl_mvm_scan_params {
79 u32 max_out_time;
80 u32 suspend_time;
81 bool passive_fragmented;
82 u32 n_channels;
83 u32 delay;
84 int n_ssids;
85 struct cfg80211_ssid *ssids;
86 struct ieee80211_channel **channels;
87 u16 interval; /* interval between scans (in secs) */
88 u32 flags;
89 u8 *mac_addr;
90 u8 *mac_addr_mask;
91 bool no_cck;
92 bool pass_all;
93 int n_match_sets;
94 struct cfg80211_match_set *match_sets;
95 struct _dwell {
96 u16 passive;
97 u16 active;
98 u16 fragmented;
99 } dwell[IEEE80211_NUM_BANDS];
100 };
101
102 enum iwl_umac_scan_uid_type {
103 IWL_UMAC_SCAN_UID_REG_SCAN = BIT(0),
104 IWL_UMAC_SCAN_UID_SCHED_SCAN = BIT(1),
105 IWL_UMAC_SCAN_UID_ALL = IWL_UMAC_SCAN_UID_REG_SCAN |
106 IWL_UMAC_SCAN_UID_SCHED_SCAN,
107 };
108
109 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
110 enum iwl_umac_scan_uid_type type, bool notify);
111
112 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
113 {
114 if (mvm->scan_rx_ant != ANT_NONE)
115 return mvm->scan_rx_ant;
116 return iwl_mvm_get_valid_rx_ant(mvm);
117 }
118
119 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
120 {
121 u16 rx_chain;
122 u8 rx_ant;
123
124 rx_ant = iwl_mvm_scan_rx_ant(mvm);
125 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
126 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
127 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
128 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
129 return cpu_to_le16(rx_chain);
130 }
131
132 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
133 {
134 if (band == IEEE80211_BAND_2GHZ)
135 return cpu_to_le32(PHY_BAND_24);
136 else
137 return cpu_to_le32(PHY_BAND_5);
138 }
139
140 static inline __le32
141 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
142 bool no_cck)
143 {
144 u32 tx_ant;
145
146 mvm->scan_last_antenna_idx =
147 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
148 mvm->scan_last_antenna_idx);
149 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
150
151 if (band == IEEE80211_BAND_2GHZ && !no_cck)
152 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
153 tx_ant);
154 else
155 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
156 }
157
158 /*
159 * If req->n_ssids > 0, it means we should do an active scan.
160 * In case of active scan w/o directed scan, we receive a zero-length SSID
161 * just to notify that this scan is active and not passive.
162 * In order to notify the FW of the number of SSIDs we wish to scan (including
163 * the zero-length one), we need to set the corresponding bits in chan->type,
164 * one for each SSID, and set the active bit (first). If the first SSID is
165 * already included in the probe template, so we need to set only
166 * req->n_ssids - 1 bits in addition to the first bit.
167 */
168 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
169 enum ieee80211_band band, int n_ssids)
170 {
171 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
172 return 10;
173 if (band == IEEE80211_BAND_2GHZ)
174 return 20 + 3 * (n_ssids + 1);
175 return 10 + 2 * (n_ssids + 1);
176 }
177
178 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
179 enum ieee80211_band band)
180 {
181 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
182 return 110;
183 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
184 }
185
186 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
187 struct ieee80211_vif *vif)
188 {
189 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
190 int *global_cnt = data;
191
192 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
193 mvmvif->phy_ctxt->id < MAX_PHYS)
194 *global_cnt += 1;
195 }
196
197 static void iwl_mvm_scan_calc_dwell(struct iwl_mvm *mvm,
198 struct ieee80211_vif *vif,
199 struct iwl_mvm_scan_params *params)
200 {
201 int global_cnt = 0;
202 enum ieee80211_band band;
203 u8 frag_passive_dwell = 0;
204
205 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
206 IEEE80211_IFACE_ITER_NORMAL,
207 iwl_mvm_scan_condition_iterator,
208 &global_cnt);
209 if (!global_cnt)
210 goto not_bound;
211
212 params->suspend_time = 30;
213 params->max_out_time = 120;
214
215 if (iwl_mvm_low_latency(mvm)) {
216 if (mvm->fw->ucode_capa.api[0] &
217 IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
218 params->suspend_time = 105;
219 /*
220 * If there is more than one active interface make
221 * passive scan more fragmented.
222 */
223 frag_passive_dwell = 40;
224 params->max_out_time = frag_passive_dwell;
225 } else {
226 params->suspend_time = 120;
227 params->max_out_time = 120;
228 }
229 }
230
231 if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
232 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
233 /*
234 * P2P device scan should not be fragmented to avoid negative
235 * impact on P2P device discovery. Configure max_out_time to be
236 * equal to dwell time on passive channel. Take a longest
237 * possible value, one that corresponds to 2GHz band
238 */
239 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
240 u32 passive_dwell =
241 iwl_mvm_get_passive_dwell(mvm,
242 IEEE80211_BAND_2GHZ);
243 params->max_out_time = passive_dwell;
244 } else {
245 params->passive_fragmented = true;
246 }
247 }
248
249 if ((params->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
250 (params->max_out_time > 200))
251 params->max_out_time = 200;
252
253 not_bound:
254
255 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
256 if (params->passive_fragmented)
257 params->dwell[band].fragmented = frag_passive_dwell;
258
259 params->dwell[band].passive = iwl_mvm_get_passive_dwell(mvm,
260 band);
261 params->dwell[band].active =
262 iwl_mvm_get_active_dwell(mvm, band, params->n_ssids);
263 }
264
265 IWL_DEBUG_SCAN(mvm,
266 "scan parameters: max_out_time %d, suspend_time %d, passive_fragmented %d\n",
267 params->max_out_time, params->suspend_time,
268 params->passive_fragmented);
269 IWL_DEBUG_SCAN(mvm,
270 "dwell[IEEE80211_BAND_2GHZ]: passive %d, active %d, fragmented %d\n",
271 params->dwell[IEEE80211_BAND_2GHZ].passive,
272 params->dwell[IEEE80211_BAND_2GHZ].active,
273 params->dwell[IEEE80211_BAND_2GHZ].fragmented);
274 IWL_DEBUG_SCAN(mvm,
275 "dwell[IEEE80211_BAND_5GHZ]: passive %d, active %d, fragmented %d\n",
276 params->dwell[IEEE80211_BAND_5GHZ].passive,
277 params->dwell[IEEE80211_BAND_5GHZ].active,
278 params->dwell[IEEE80211_BAND_5GHZ].fragmented);
279 }
280
281 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
282 {
283 /* require rrm scan whenever the fw supports it */
284 return mvm->fw->ucode_capa.capa[0] &
285 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
286 }
287
288 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
289 {
290 int max_probe_len;
291
292 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
293
294 /* we create the 802.11 header and SSID element */
295 max_probe_len -= 24 + 2;
296
297 /* DS parameter set element is added on 2.4GHZ band if required */
298 if (iwl_mvm_rrm_scan_needed(mvm))
299 max_probe_len -= 3;
300
301 return max_probe_len;
302 }
303
304 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
305 {
306 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
307
308 /* TODO: [BUG] This function should return the maximum allowed size of
309 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
310 * in the same command. So the correct implementation of this function
311 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
312 * command has only 512 bytes and it would leave us with about 240
313 * bytes for scan IEs, which is clearly not enough. So meanwhile
314 * we will report an incorrect value. This may result in a failure to
315 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
316 * functions with -ENOBUFS, if a large enough probe will be provided.
317 */
318 return max_ie_len;
319 }
320
321 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm,
322 struct iwl_rx_cmd_buffer *rxb,
323 struct iwl_device_cmd *cmd)
324 {
325 struct iwl_rx_packet *pkt = rxb_addr(rxb);
326 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
327
328 IWL_DEBUG_SCAN(mvm,
329 "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
330 notif->status, notif->scanned_channels);
331 return 0;
332 }
333
334 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
335 struct iwl_rx_cmd_buffer *rxb,
336 struct iwl_device_cmd *cmd)
337 {
338 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
339 ieee80211_sched_scan_results(mvm->hw);
340
341 return 0;
342 }
343
344 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
345 struct iwl_rx_cmd_buffer *rxb,
346 struct iwl_device_cmd *cmd)
347 {
348 struct iwl_rx_packet *pkt = rxb_addr(rxb);
349 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
350 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
351 bool ebs_successful = (scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS);
352
353 /* scan status must be locked for proper checking */
354 lockdep_assert_held(&mvm->mutex);
355
356 /* We first check if we were stopping a scan, in which case we
357 * just clear the stopping flag. Then we check if it was a
358 * firmware initiated stop, in which case we need to inform
359 * mac80211.
360 * Note that we can have a stopping and a running scan
361 * simultaneously, but we can't have two different types of
362 * scans stopping or running at the same time (since LMAC
363 * doesn't support it).
364 */
365
366 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
367 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
368
369 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
370 aborted ? "aborted" : "completed",
371 ebs_successful ? "successful" : "failed");
372
373 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
374 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
375 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
376 aborted ? "aborted" : "completed",
377 ebs_successful ? "successful" : "failed");
378
379 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
380 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
381 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
382
383 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s (FW)\n",
384 aborted ? "aborted" : "completed",
385 ebs_successful ? "successful" : "failed");
386
387 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
388 ieee80211_sched_scan_stopped(mvm->hw);
389 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
390 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
391 aborted ? "aborted" : "completed",
392 ebs_successful ? "successful" : "failed");
393
394 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
395 ieee80211_scan_completed(mvm->hw,
396 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
397 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
398 }
399
400 mvm->last_ebs_successful = ebs_successful;
401
402 return 0;
403 }
404
405 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
406 {
407 int i;
408
409 for (i = 0; i < PROBE_OPTION_MAX; i++) {
410 if (!ssid_list[i].len)
411 break;
412 if (ssid_list[i].len == ssid_len &&
413 !memcmp(ssid_list->ssid, ssid, ssid_len))
414 return i;
415 }
416 return -1;
417 }
418
419 /* We insert the SSIDs in an inverted order, because the FW will
420 * invert it back.
421 */
422 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
423 struct iwl_ssid_ie *ssids,
424 u32 *ssid_bitmap)
425 {
426 int i, j;
427 int index;
428
429 /*
430 * copy SSIDs from match list.
431 * iwl_config_sched_scan_profiles() uses the order of these ssids to
432 * config match list.
433 */
434 for (i = 0, j = params->n_match_sets - 1;
435 j >= 0 && i < PROBE_OPTION_MAX;
436 i++, j--) {
437 /* skip empty SSID matchsets */
438 if (!params->match_sets[j].ssid.ssid_len)
439 continue;
440 ssids[i].id = WLAN_EID_SSID;
441 ssids[i].len = params->match_sets[j].ssid.ssid_len;
442 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
443 ssids[i].len);
444 }
445
446 /* add SSIDs from scan SSID list */
447 *ssid_bitmap = 0;
448 for (j = params->n_ssids - 1;
449 j >= 0 && i < PROBE_OPTION_MAX;
450 i++, j--) {
451 index = iwl_ssid_exist(params->ssids[j].ssid,
452 params->ssids[j].ssid_len,
453 ssids);
454 if (index < 0) {
455 if (!params->ssids[j].ssid_len)
456 continue;
457 ssids[i].id = WLAN_EID_SSID;
458 ssids[i].len = params->ssids[j].ssid_len;
459 memcpy(ssids[i].ssid, params->ssids[j].ssid,
460 ssids[i].len);
461 *ssid_bitmap |= BIT(i);
462 } else {
463 *ssid_bitmap |= BIT(index);
464 }
465 }
466 }
467
468 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
469 struct cfg80211_sched_scan_request *req)
470 {
471 struct iwl_scan_offload_profile *profile;
472 struct iwl_scan_offload_profile_cfg *profile_cfg;
473 struct iwl_scan_offload_blacklist *blacklist;
474 struct iwl_host_cmd cmd = {
475 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
476 .len[1] = sizeof(*profile_cfg),
477 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
478 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
479 };
480 int blacklist_len;
481 int i;
482 int ret;
483
484 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
485 return -EIO;
486
487 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
488 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
489 else
490 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
491
492 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
493 if (!blacklist)
494 return -ENOMEM;
495
496 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
497 if (!profile_cfg) {
498 ret = -ENOMEM;
499 goto free_blacklist;
500 }
501
502 cmd.data[0] = blacklist;
503 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
504 cmd.data[1] = profile_cfg;
505
506 /* No blacklist configuration */
507
508 profile_cfg->num_profiles = req->n_match_sets;
509 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
510 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
511 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
512 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
513 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
514
515 for (i = 0; i < req->n_match_sets; i++) {
516 profile = &profile_cfg->profiles[i];
517 profile->ssid_index = i;
518 /* Support any cipher and auth algorithm */
519 profile->unicast_cipher = 0xff;
520 profile->auth_alg = 0xff;
521 profile->network_type = IWL_NETWORK_TYPE_ANY;
522 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
523 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
524 }
525
526 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
527
528 ret = iwl_mvm_send_cmd(mvm, &cmd);
529 kfree(profile_cfg);
530 free_blacklist:
531 kfree(blacklist);
532
533 return ret;
534 }
535
536 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
537 struct cfg80211_sched_scan_request *req)
538 {
539 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
540 IWL_DEBUG_SCAN(mvm,
541 "Sending scheduled scan with filtering, n_match_sets %d\n",
542 req->n_match_sets);
543 return false;
544 }
545
546 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
547 return true;
548 }
549
550 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
551 {
552 int ret;
553 struct iwl_host_cmd cmd = {
554 .id = SCAN_OFFLOAD_ABORT_CMD,
555 };
556 u32 status;
557
558 /* Exit instantly with error when device is not ready
559 * to receive scan abort command or it does not perform
560 * scheduled scan currently */
561 if (!mvm->scan_status)
562 return -EIO;
563
564 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
565 if (ret)
566 return ret;
567
568 if (status != CAN_ABORT_STATUS) {
569 /*
570 * The scan abort will return 1 for success or
571 * 2 for "failure". A failure condition can be
572 * due to simply not being in an active scan which
573 * can occur if we send the scan abort before the
574 * microcode has notified us that a scan is completed.
575 */
576 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
577 ret = -ENOENT;
578 }
579
580 return ret;
581 }
582
583 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
584 {
585 int ret;
586 struct iwl_notification_wait wait_scan_done;
587 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
588 bool sched = !!(mvm->scan_status & IWL_MVM_SCAN_SCHED);
589
590 lockdep_assert_held(&mvm->mutex);
591
592 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
593 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
594 notify);
595
596 /* FIXME: For now we only check if no scan is set here, since
597 * we only support LMAC in this flow and it doesn't support
598 * multiple scans.
599 */
600 if (!mvm->scan_status)
601 return 0;
602
603 if (iwl_mvm_is_radio_killed(mvm)) {
604 ret = 0;
605 goto out;
606 }
607
608 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
609 scan_done_notif,
610 ARRAY_SIZE(scan_done_notif),
611 NULL, NULL);
612
613 ret = iwl_mvm_send_scan_offload_abort(mvm);
614 if (ret) {
615 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
616 sched ? "offloaded " : "", ret);
617 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
618 goto out;
619 }
620
621 IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
622 sched ? "scheduled " : "");
623
624 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
625 out:
626 /* Clear the scan status so the next scan requests will
627 * succeed and mark the scan as stopping, so that the Rx
628 * handler doesn't do anything, as the scan was stopped from
629 * above. Since the rx handler won't do anything now, we have
630 * to release the scan reference here.
631 */
632 if (mvm->scan_status == IWL_MVM_SCAN_REGULAR)
633 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
634
635 if (sched) {
636 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
637 mvm->scan_status |= IWL_MVM_SCAN_STOPPING_SCHED;
638 if (notify)
639 ieee80211_sched_scan_stopped(mvm->hw);
640 } else {
641 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
642 mvm->scan_status |= IWL_MVM_SCAN_STOPPING_REGULAR;
643 if (notify)
644 ieee80211_scan_completed(mvm->hw, true);
645 }
646
647 return ret;
648 }
649
650 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
651 struct iwl_scan_req_tx_cmd *tx_cmd,
652 bool no_cck)
653 {
654 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
655 TX_CMD_FLG_BT_DIS);
656 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
657 IEEE80211_BAND_2GHZ,
658 no_cck);
659 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
660
661 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
662 TX_CMD_FLG_BT_DIS);
663 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
664 IEEE80211_BAND_5GHZ,
665 no_cck);
666 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
667 }
668
669 static void
670 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
671 struct ieee80211_channel **channels,
672 int n_channels, u32 ssid_bitmap,
673 struct iwl_scan_req_lmac *cmd)
674 {
675 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
676 int i;
677
678 for (i = 0; i < n_channels; i++) {
679 channel_cfg[i].channel_num =
680 cpu_to_le16(channels[i]->hw_value);
681 channel_cfg[i].iter_count = cpu_to_le16(1);
682 channel_cfg[i].iter_interval = 0;
683 channel_cfg[i].flags =
684 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
685 ssid_bitmap);
686 }
687 }
688
689 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
690 size_t len, u8 *const pos)
691 {
692 static const u8 before_ds_params[] = {
693 WLAN_EID_SSID,
694 WLAN_EID_SUPP_RATES,
695 WLAN_EID_REQUEST,
696 WLAN_EID_EXT_SUPP_RATES,
697 };
698 size_t offs;
699 u8 *newpos = pos;
700
701 if (!iwl_mvm_rrm_scan_needed(mvm)) {
702 memcpy(newpos, ies, len);
703 return newpos + len;
704 }
705
706 offs = ieee80211_ie_split(ies, len,
707 before_ds_params,
708 ARRAY_SIZE(before_ds_params),
709 0);
710
711 memcpy(newpos, ies, offs);
712 newpos += offs;
713
714 /* Add a placeholder for DS Parameter Set element */
715 *newpos++ = WLAN_EID_DS_PARAMS;
716 *newpos++ = 1;
717 *newpos++ = 0;
718
719 memcpy(newpos, ies + offs, len - offs);
720 newpos += len - offs;
721
722 return newpos;
723 }
724
725 static void
726 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
727 struct ieee80211_scan_ies *ies,
728 struct iwl_scan_probe_req *preq,
729 const u8 *mac_addr, const u8 *mac_addr_mask)
730 {
731 struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
732 u8 *pos, *newpos;
733
734 /*
735 * Unfortunately, right now the offload scan doesn't support randomising
736 * within the firmware, so until the firmware API is ready we implement
737 * it in the driver. This means that the scan iterations won't really be
738 * random, only when it's restarted, but at least that helps a bit.
739 */
740 if (mac_addr)
741 get_random_mask_addr(frame->sa, mac_addr, mac_addr_mask);
742 else
743 memcpy(frame->sa, vif->addr, ETH_ALEN);
744
745 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
746 eth_broadcast_addr(frame->da);
747 eth_broadcast_addr(frame->bssid);
748 frame->seq_ctrl = 0;
749
750 pos = frame->u.probe_req.variable;
751 *pos++ = WLAN_EID_SSID;
752 *pos++ = 0;
753
754 preq->mac_header.offset = 0;
755 preq->mac_header.len = cpu_to_le16(24 + 2);
756
757 /* Insert ds parameter set element on 2.4 GHz band */
758 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
759 ies->ies[IEEE80211_BAND_2GHZ],
760 ies->len[IEEE80211_BAND_2GHZ],
761 pos);
762 preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
763 preq->band_data[0].len = cpu_to_le16(newpos - pos);
764 pos = newpos;
765
766 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
767 ies->len[IEEE80211_BAND_5GHZ]);
768 preq->band_data[1].offset = cpu_to_le16(pos - preq->buf);
769 preq->band_data[1].len = cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
770 pos += ies->len[IEEE80211_BAND_5GHZ];
771
772 memcpy(pos, ies->common_ies, ies->common_ie_len);
773 preq->common_data.offset = cpu_to_le16(pos - preq->buf);
774 preq->common_data.len = cpu_to_le16(ies->common_ie_len);
775 }
776
777 static void
778 iwl_mvm_build_generic_scan_cmd(struct iwl_mvm *mvm,
779 struct iwl_scan_req_lmac *cmd,
780 struct iwl_mvm_scan_params *params)
781 {
782 memset(cmd, 0, ksize(cmd));
783 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
784 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
785 if (params->passive_fragmented)
786 cmd->fragmented_dwell =
787 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
788 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
789 cmd->max_out_time = cpu_to_le32(params->max_out_time);
790 cmd->suspend_time = cpu_to_le32(params->suspend_time);
791 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
792 cmd->iter_num = cpu_to_le32(1);
793
794 if (iwl_mvm_rrm_scan_needed(mvm))
795 cmd->scan_flags |=
796 cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
797 }
798
799 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
800 struct ieee80211_scan_ies *ies,
801 int n_channels)
802 {
803 return ((n_ssids <= PROBE_OPTION_MAX) &&
804 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
805 (ies->common_ie_len +
806 ies->len[NL80211_BAND_2GHZ] +
807 ies->len[NL80211_BAND_5GHZ] <=
808 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
809 }
810
811 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
812 struct ieee80211_scan_ies *ies,
813 struct iwl_mvm_scan_params *params)
814 {
815 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
816 struct iwl_scan_probe_req *preq;
817 u32 flags = 0, ssid_bitmap = 0;
818
819 lockdep_assert_held(&mvm->mutex);
820
821 iwl_mvm_build_generic_scan_cmd(mvm, cmd, params);
822
823 cmd->n_channels = (u8)params->n_channels;
824
825 cmd->delay = cpu_to_le32(params->delay);
826
827 if (params->pass_all)
828 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
829 else
830 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
831
832 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
833 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
834
835 if (params->passive_fragmented)
836 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
837
838 if (params->n_ssids == 0)
839 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
840
841 #ifdef CONFIG_IWLWIFI_DEBUGFS
842 /* TODO: Check if it's okay to have this in regular scans */
843 if (mvm->scan_iter_notif_enabled)
844 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
845 #endif
846
847 cmd->scan_flags |= cpu_to_le32(flags);
848
849 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
850 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
851 MAC_FILTER_IN_BEACON);
852 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
853 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
854
855 /* this API uses bits 1-20 instead of 0-19 */
856 ssid_bitmap <<= 1;
857
858 cmd->schedule[0].delay = cpu_to_le16(params->interval);
859 cmd->schedule[0].iterations = 1;
860 cmd->schedule[0].full_scan_mul = 0;
861 cmd->schedule[1].delay = cpu_to_le16(params->interval);
862 cmd->schedule[1].iterations = 0;
863 cmd->schedule[1].full_scan_mul = 0;
864
865 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
866 mvm->last_ebs_successful) {
867 cmd->channel_opt[0].flags =
868 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
869 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
870 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
871 cmd->channel_opt[0].non_ebs_ratio =
872 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
873 cmd->channel_opt[1].flags =
874 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
875 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
876 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
877 cmd->channel_opt[1].non_ebs_ratio =
878 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
879 }
880
881 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
882 params->n_channels, ssid_bitmap, cmd);
883
884 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
885 mvm->fw->ucode_capa.n_scan_channels);
886
887 iwl_mvm_build_scan_probe(mvm, vif, ies, preq,
888 params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
889 params->mac_addr : NULL,
890 params->mac_addr_mask);
891
892 return 0;
893 }
894
895 static int
896 iwl_mvm_sched_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
897 struct ieee80211_scan_ies *ies,
898 struct iwl_mvm_scan_params *params)
899 {
900 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
901 struct iwl_scan_probe_req *preq;
902 u32 flags = 0, ssid_bitmap = 0;
903
904 lockdep_assert_held(&mvm->mutex);
905
906 iwl_mvm_build_generic_scan_cmd(mvm, cmd, params);
907
908 cmd->n_channels = (u8)params->n_channels;
909
910 cmd->delay = cpu_to_le32(params->delay);
911
912 if (params->pass_all)
913 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
914 else
915 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
916
917 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
918 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
919
920 if (params->passive_fragmented)
921 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
922
923 if (params->n_ssids == 0)
924 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
925
926 #ifdef CONFIG_IWLWIFI_DEBUGFS
927 if (mvm->scan_iter_notif_enabled)
928 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
929 #endif
930
931 cmd->scan_flags |= cpu_to_le32(flags);
932
933 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
934 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
935 MAC_FILTER_IN_BEACON);
936 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
937
938 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
939
940 /* this API uses bits 1-20 instead of 0-19 */
941 ssid_bitmap <<= 1;
942
943 cmd->schedule[0].delay = cpu_to_le16(params->interval);
944 cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
945 cmd->schedule[0].full_scan_mul = 1;
946
947 cmd->schedule[1].delay = cpu_to_le16(params->interval);
948 cmd->schedule[1].iterations = 0xff;
949 cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
950
951 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
952 mvm->last_ebs_successful) {
953 cmd->channel_opt[0].flags =
954 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
955 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
956 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
957 cmd->channel_opt[0].non_ebs_ratio =
958 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
959 cmd->channel_opt[1].flags =
960 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
961 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
962 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
963 cmd->channel_opt[1].non_ebs_ratio =
964 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
965 }
966
967 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
968 params->n_channels, ssid_bitmap, cmd);
969
970 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
971 mvm->fw->ucode_capa.n_scan_channels);
972
973 iwl_mvm_build_scan_probe(mvm, vif, ies, preq,
974 params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
975 params->mac_addr : NULL,
976 params->mac_addr_mask);
977
978 return 0;
979 }
980
981
982 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
983 {
984 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
985 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN,
986 true);
987
988 if (!(mvm->scan_status & IWL_MVM_SCAN_REGULAR))
989 return 0;
990
991 if (iwl_mvm_is_radio_killed(mvm)) {
992 ieee80211_scan_completed(mvm->hw, true);
993 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
994 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
995 return 0;
996 }
997
998 return iwl_mvm_scan_offload_stop(mvm, true);
999 }
1000
1001 /* UMAC scan API */
1002
1003 struct iwl_umac_scan_done {
1004 struct iwl_mvm *mvm;
1005 enum iwl_umac_scan_uid_type type;
1006 };
1007
1008 static int rate_to_scan_rate_flag(unsigned int rate)
1009 {
1010 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1011 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
1012 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
1013 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
1014 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
1015 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
1016 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
1017 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
1018 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
1019 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
1020 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
1021 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
1022 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
1023 };
1024
1025 return rate_to_scan_rate[rate];
1026 }
1027
1028 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1029 {
1030 struct ieee80211_supported_band *band;
1031 unsigned int rates = 0;
1032 int i;
1033
1034 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1035 for (i = 0; i < band->n_bitrates; i++)
1036 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1037 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1038 for (i = 0; i < band->n_bitrates; i++)
1039 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1040
1041 /* Set both basic rates and supported rates */
1042 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1043
1044 return cpu_to_le32(rates);
1045 }
1046
1047 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1048 {
1049
1050 struct iwl_scan_config *scan_config;
1051 struct ieee80211_supported_band *band;
1052 int num_channels =
1053 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
1054 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
1055 int ret, i, j = 0, cmd_size, data_size;
1056 struct iwl_host_cmd cmd = {
1057 .id = SCAN_CFG_CMD,
1058 };
1059
1060 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1061 return -ENOBUFS;
1062
1063 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
1064
1065 scan_config = kzalloc(cmd_size, GFP_KERNEL);
1066 if (!scan_config)
1067 return -ENOMEM;
1068
1069 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
1070 scan_config->hdr.size = cpu_to_le16(data_size);
1071 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
1072 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1073 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1074 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1075 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1076 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1077 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1078 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
1079 SCAN_CONFIG_N_CHANNELS(num_channels));
1080 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1081 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1082 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1083 scan_config->out_of_channel_time = cpu_to_le32(170);
1084 scan_config->suspend_time = cpu_to_le32(30);
1085 scan_config->dwell_active = 20;
1086 scan_config->dwell_passive = 110;
1087 scan_config->dwell_fragmented = 20;
1088
1089 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1090
1091 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1092 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1093 IWL_CHANNEL_FLAG_ACCURATE_EBS |
1094 IWL_CHANNEL_FLAG_EBS_ADD |
1095 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1096
1097 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1098 for (i = 0; i < band->n_channels; i++, j++)
1099 scan_config->channel_array[j] = band->channels[i].hw_value;
1100 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1101 for (i = 0; i < band->n_channels; i++, j++)
1102 scan_config->channel_array[j] = band->channels[i].hw_value;
1103
1104 cmd.data[0] = scan_config;
1105 cmd.len[0] = cmd_size;
1106 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1107
1108 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1109
1110 ret = iwl_mvm_send_cmd(mvm, &cmd);
1111
1112 kfree(scan_config);
1113 return ret;
1114 }
1115
1116 static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1117 {
1118 int i;
1119
1120 for (i = 0; i < mvm->max_scans; i++)
1121 if (mvm->scan_uid[i] == uid)
1122 return i;
1123
1124 return i;
1125 }
1126
1127 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1128 {
1129 return iwl_mvm_find_scan_uid(mvm, 0);
1130 }
1131
1132 static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm,
1133 enum iwl_umac_scan_uid_type type)
1134 {
1135 int i;
1136
1137 for (i = 0; i < mvm->max_scans; i++)
1138 if (mvm->scan_uid[i] & type)
1139 return true;
1140
1141 return false;
1142 }
1143
1144 static int iwl_mvm_find_first_scan(struct iwl_mvm *mvm,
1145 enum iwl_umac_scan_uid_type type)
1146 {
1147 int i;
1148
1149 for (i = 0; i < mvm->max_scans; i++)
1150 if (mvm->scan_uid[i] & type)
1151 return i;
1152
1153 return i;
1154 }
1155
1156 static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm,
1157 enum iwl_umac_scan_uid_type type)
1158 {
1159 u32 uid;
1160
1161 /* make sure exactly one bit is on in scan type */
1162 WARN_ON(hweight8(type) != 1);
1163
1164 /*
1165 * Make sure scan uids are unique. If one scan lasts long time while
1166 * others are completing frequently, the seq number will wrap up and
1167 * we may have more than one scan with the same uid.
1168 */
1169 do {
1170 uid = type | (mvm->scan_seq_num <<
1171 IWL_UMAC_SCAN_UID_SEQ_OFFSET);
1172 mvm->scan_seq_num++;
1173 } while (iwl_mvm_find_scan_uid(mvm, uid) < mvm->max_scans);
1174
1175 IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
1176
1177 return uid;
1178 }
1179
1180 static void
1181 iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm *mvm,
1182 struct iwl_scan_req_umac *cmd,
1183 struct iwl_mvm_scan_params *params)
1184 {
1185 memset(cmd, 0, ksize(cmd));
1186 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1187 sizeof(struct iwl_mvm_umac_cmd_hdr));
1188 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1189 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1190 if (params->passive_fragmented)
1191 cmd->fragmented_dwell =
1192 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
1193 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1194 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1195 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1196 }
1197
1198 static void
1199 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1200 struct ieee80211_channel **channels,
1201 int n_channels, u32 ssid_bitmap,
1202 struct iwl_scan_req_umac *cmd)
1203 {
1204 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1205 int i;
1206
1207 for (i = 0; i < n_channels; i++) {
1208 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1209 channel_cfg[i].channel_num = channels[i]->hw_value;
1210 channel_cfg[i].iter_count = 1;
1211 channel_cfg[i].iter_interval = 0;
1212 }
1213 }
1214
1215 static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids,
1216 struct cfg80211_ssid *ssids,
1217 int fragmented)
1218 {
1219 int flags = 0;
1220
1221 if (n_ssids == 0)
1222 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1223
1224 if (n_ssids == 1 && ssids[0].ssid_len != 0)
1225 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1226
1227 if (fragmented)
1228 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1229
1230 if (iwl_mvm_rrm_scan_needed(mvm))
1231 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1232
1233 return flags;
1234 }
1235
1236 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1237 struct ieee80211_scan_ies *ies,
1238 struct iwl_mvm_scan_params *params)
1239 {
1240 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1241 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1242 sizeof(struct iwl_scan_channel_cfg_umac) *
1243 mvm->fw->ucode_capa.n_scan_channels;
1244 u32 uid, flags;
1245 u32 ssid_bitmap = 0;
1246 int uid_idx;
1247
1248 lockdep_assert_held(&mvm->mutex);
1249
1250 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1251 if (uid_idx >= mvm->max_scans)
1252 return -EBUSY;
1253
1254 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, params);
1255
1256 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1257 mvm->scan_uid[uid_idx] = uid;
1258 cmd->uid = cpu_to_le32(uid);
1259
1260 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1261
1262 flags = iwl_mvm_scan_umac_common_flags(mvm, params->n_ssids,
1263 params->ssids,
1264 params->passive_fragmented);
1265
1266 if (params->pass_all)
1267 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1268 else
1269 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1270
1271 cmd->general_flags = cpu_to_le32(flags);
1272
1273 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
1274 mvm->last_ebs_successful)
1275 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1276 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1277 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1278
1279 cmd->n_channels = params->n_channels;
1280
1281 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1282
1283 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1284 params->n_channels, ssid_bitmap, cmd);
1285
1286 sec_part->schedule[0].iter_count = 1;
1287 sec_part->delay = 0;
1288
1289 iwl_mvm_build_scan_probe(mvm, vif, ies, &sec_part->preq,
1290 params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1291 params->mac_addr : NULL,
1292 params->mac_addr_mask);
1293
1294 return 0;
1295 }
1296
1297 static int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm,
1298 struct ieee80211_vif *vif,
1299 struct ieee80211_scan_ies *ies,
1300 struct iwl_mvm_scan_params *params)
1301 {
1302 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1303 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1304 sizeof(struct iwl_scan_channel_cfg_umac) *
1305 mvm->fw->ucode_capa.n_scan_channels;
1306 u32 uid, flags;
1307 u32 ssid_bitmap = 0;
1308 int uid_idx;
1309
1310 lockdep_assert_held(&mvm->mutex);
1311
1312 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1313 if (uid_idx >= mvm->max_scans)
1314 return -EBUSY;
1315
1316 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, params);
1317
1318 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1319
1320 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN);
1321 mvm->scan_uid[uid_idx] = uid;
1322 cmd->uid = cpu_to_le32(uid);
1323
1324 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1325
1326 flags = iwl_mvm_scan_umac_common_flags(mvm, params->n_ssids,
1327 params->ssids,
1328 params->passive_fragmented);
1329
1330 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1331
1332 if (params->pass_all)
1333 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1334 else
1335 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1336
1337 cmd->general_flags = cpu_to_le32(flags);
1338
1339 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1340 mvm->last_ebs_successful)
1341 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1342 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1343 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1344
1345 cmd->n_channels = params->n_channels;
1346
1347 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1348
1349 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1350 params->n_channels, ssid_bitmap, cmd);
1351
1352 sec_part->schedule[0].interval =
1353 cpu_to_le16(params->interval / MSEC_PER_SEC);
1354 sec_part->schedule[0].iter_count = 0xff;
1355
1356 if (params->delay > U16_MAX) {
1357 IWL_DEBUG_SCAN(mvm,
1358 "delay value is > 16-bits, set to max possible\n");
1359 sec_part->delay = cpu_to_le16(U16_MAX);
1360 } else {
1361 sec_part->delay = cpu_to_le16(params->delay);
1362 }
1363
1364 iwl_mvm_build_scan_probe(mvm, vif, ies, &sec_part->preq,
1365 params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1366 params->mac_addr : NULL,
1367 params->mac_addr_mask);
1368
1369 return 0;
1370 }
1371
1372 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1373 {
1374 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1375 }
1376
1377 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1378 {
1379 /* This looks a bit arbitrary, but the idea is that if we run
1380 * out of possible simultaneous scans and the userspace is
1381 * trying to run a scan type that is already running, we
1382 * return -EBUSY. But if the userspace wants to start a
1383 * different type of scan, we stop the opposite type to make
1384 * space for the new request. The reason is backwards
1385 * compatibility with old wpa_supplicant that wouldn't stop a
1386 * scheduled scan before starting a normal scan.
1387 */
1388
1389 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1390 return 0;
1391
1392 /* Use a switch, even though this is a bitmask, so that more
1393 * than one bits set will fall in default and we will warn.
1394 */
1395 switch (type) {
1396 case IWL_MVM_SCAN_REGULAR:
1397 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1398 return -EBUSY;
1399 return iwl_mvm_scan_offload_stop(mvm, true);
1400 case IWL_MVM_SCAN_SCHED:
1401 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1402 return -EBUSY;
1403 return iwl_mvm_cancel_scan(mvm);
1404 case IWL_MVM_SCAN_NETDETECT:
1405 /* No need to stop anything for net-detect since the
1406 * firmware is restarted anyway. This way, any sched
1407 * scans that were running will be restarted when we
1408 * resume.
1409 */
1410 return 0;
1411 default:
1412 WARN_ON(1);
1413 break;
1414 }
1415
1416 return -EIO;
1417 }
1418
1419 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1420 struct cfg80211_scan_request *req,
1421 struct ieee80211_scan_ies *ies)
1422 {
1423 struct iwl_host_cmd hcmd = {
1424 .len = { iwl_mvm_scan_size(mvm), },
1425 .data = { mvm->scan_cmd, },
1426 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1427 };
1428 struct iwl_mvm_scan_params params = {};
1429 int ret;
1430
1431 lockdep_assert_held(&mvm->mutex);
1432
1433 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1434 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1435 return -EBUSY;
1436 }
1437
1438 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1439 if (ret)
1440 return ret;
1441
1442 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1443
1444 /* we should have failed registration if scan_cmd was NULL */
1445 if (WARN_ON(!mvm->scan_cmd))
1446 return -ENOMEM;
1447
1448 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1449 return -ENOBUFS;
1450
1451 params.n_ssids = req->n_ssids;
1452 params.flags = req->flags;
1453 params.n_channels = req->n_channels;
1454 params.delay = 0;
1455 params.interval = 0;
1456 params.ssids = req->ssids;
1457 params.channels = req->channels;
1458 params.mac_addr = req->mac_addr;
1459 params.mac_addr_mask = req->mac_addr_mask;
1460 params.no_cck = req->no_cck;
1461 params.pass_all = true;
1462 params.n_match_sets = 0;
1463 params.match_sets = NULL;
1464
1465 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1466
1467 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1468 hcmd.id = SCAN_REQ_UMAC;
1469 ret = iwl_mvm_scan_umac(mvm, vif, ies, &params);
1470 } else {
1471 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1472 ret = iwl_mvm_scan_lmac(mvm, vif, ies, &params);
1473 }
1474
1475 if (ret)
1476 return ret;
1477
1478 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1479 if (!ret) {
1480 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1481 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1482 } else {
1483 /* If the scan failed, it usually means that the FW was unable
1484 * to allocate the time events. Warn on it, but maybe we
1485 * should try to send the command again with different params.
1486 */
1487 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1488 }
1489
1490 if (ret)
1491 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1492
1493 return ret;
1494 }
1495
1496 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1497 struct ieee80211_vif *vif,
1498 struct cfg80211_sched_scan_request *req,
1499 struct ieee80211_scan_ies *ies,
1500 int type)
1501 {
1502 struct iwl_host_cmd hcmd = {
1503 .len = { iwl_mvm_scan_size(mvm), },
1504 .data = { mvm->scan_cmd, },
1505 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1506 };
1507 struct iwl_mvm_scan_params params = {};
1508 int ret;
1509
1510 lockdep_assert_held(&mvm->mutex);
1511
1512 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1513 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1514 return -EBUSY;
1515 }
1516
1517 ret = iwl_mvm_check_running_scans(mvm, type);
1518 if (ret)
1519 return ret;
1520
1521 /* we should have failed registration if scan_cmd was NULL */
1522 if (WARN_ON(!mvm->scan_cmd))
1523 return -ENOMEM;
1524
1525 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1526 return -ENOBUFS;
1527
1528 params.n_ssids = req->n_ssids;
1529 params.flags = req->flags;
1530 params.n_channels = req->n_channels;
1531 params.delay = req->delay;
1532 params.ssids = req->ssids;
1533 params.channels = req->channels;
1534 params.mac_addr = req->mac_addr;
1535 params.mac_addr_mask = req->mac_addr_mask;
1536 params.no_cck = false;
1537 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1538 params.n_match_sets = req->n_match_sets;
1539 params.match_sets = req->match_sets;
1540
1541 if (req->interval > U16_MAX) {
1542 IWL_DEBUG_SCAN(mvm,
1543 "interval value is > 16-bits, set to max possible\n");
1544 params.interval = U16_MAX;
1545 } else {
1546 params.interval = req->interval / MSEC_PER_SEC;
1547 }
1548
1549 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1550
1551 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1552 if (ret)
1553 return ret;
1554
1555 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1556 hcmd.id = SCAN_REQ_UMAC;
1557 ret = iwl_mvm_sched_scan_umac(mvm, vif, ies, &params);
1558 } else {
1559 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1560 ret = iwl_mvm_sched_scan_lmac(mvm, vif, ies, &params);
1561 }
1562
1563 if (ret)
1564 return ret;
1565
1566 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1567 if (!ret) {
1568 IWL_DEBUG_SCAN(mvm,
1569 "Sched scan request was sent successfully\n");
1570 mvm->scan_status |= type;
1571 } else {
1572 /* If the scan failed, it usually means that the FW was unable
1573 * to allocate the time events. Warn on it, but maybe we
1574 * should try to send the command again with different params.
1575 */
1576 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1577 }
1578
1579 return ret;
1580 }
1581
1582 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1583 struct iwl_rx_cmd_buffer *rxb,
1584 struct iwl_device_cmd *cmd)
1585 {
1586 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1587 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1588 u32 uid = __le32_to_cpu(notif->uid);
1589 bool sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN);
1590 int uid_idx = iwl_mvm_find_scan_uid(mvm, uid);
1591
1592 /*
1593 * Scan uid may be set to zero in case of scan abort request from above.
1594 */
1595 if (uid_idx >= mvm->max_scans)
1596 return 0;
1597
1598 IWL_DEBUG_SCAN(mvm,
1599 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
1600 uid, sched ? "sched" : "regular",
1601 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1602 "completed" : "aborted",
1603 notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
1604 "success" : "failed");
1605
1606 if (notif->ebs_status)
1607 mvm->last_ebs_successful = false;
1608
1609 mvm->scan_uid[uid_idx] = 0;
1610
1611 if (!sched) {
1612 ieee80211_scan_completed(mvm->hw,
1613 notif->status ==
1614 IWL_SCAN_OFFLOAD_ABORTED);
1615 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1616 } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) {
1617 ieee80211_sched_scan_stopped(mvm->hw);
1618 } else {
1619 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
1620 }
1621
1622 return 0;
1623 }
1624
1625 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
1626 struct iwl_rx_packet *pkt, void *data)
1627 {
1628 struct iwl_umac_scan_done *scan_done = data;
1629 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1630 u32 uid = __le32_to_cpu(notif->uid);
1631 int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid);
1632
1633 if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
1634 return false;
1635
1636 if (uid_idx >= scan_done->mvm->max_scans)
1637 return false;
1638
1639 /*
1640 * Clear scan uid of scans that was aborted from above and completed
1641 * in FW so the RX handler does nothing. Set last_ebs_successful here if
1642 * needed.
1643 */
1644 scan_done->mvm->scan_uid[uid_idx] = 0;
1645
1646 if (notif->ebs_status)
1647 scan_done->mvm->last_ebs_successful = false;
1648
1649 return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
1650 }
1651
1652 static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
1653 {
1654 struct iwl_umac_scan_abort cmd = {
1655 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
1656 sizeof(struct iwl_mvm_umac_cmd_hdr)),
1657 .uid = cpu_to_le32(uid),
1658 };
1659
1660 lockdep_assert_held(&mvm->mutex);
1661
1662 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1663
1664 return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
1665 }
1666
1667 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
1668 enum iwl_umac_scan_uid_type type, bool notify)
1669 {
1670 struct iwl_notification_wait wait_scan_done;
1671 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, };
1672 struct iwl_umac_scan_done scan_done = {
1673 .mvm = mvm,
1674 .type = type,
1675 };
1676 int i, ret = -EIO;
1677
1678 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1679 scan_done_notif,
1680 ARRAY_SIZE(scan_done_notif),
1681 iwl_scan_umac_done_check, &scan_done);
1682
1683 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1684
1685 for (i = 0; i < mvm->max_scans; i++) {
1686 if (mvm->scan_uid[i] & type) {
1687 int err;
1688
1689 if (iwl_mvm_is_radio_killed(mvm) &&
1690 (type & IWL_UMAC_SCAN_UID_REG_SCAN)) {
1691 ieee80211_scan_completed(mvm->hw, true);
1692 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1693 break;
1694 }
1695
1696 err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
1697 if (!err)
1698 ret = 0;
1699 }
1700 }
1701
1702 if (ret) {
1703 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
1704 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1705 return ret;
1706 }
1707
1708 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1709 if (ret)
1710 return ret;
1711
1712 if (notify) {
1713 if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN)
1714 ieee80211_sched_scan_stopped(mvm->hw);
1715 if (type & IWL_UMAC_SCAN_UID_REG_SCAN) {
1716 ieee80211_scan_completed(mvm->hw, true);
1717 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1718 }
1719 }
1720
1721 return ret;
1722 }
1723
1724 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1725 {
1726 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1727 return sizeof(struct iwl_scan_req_umac) +
1728 sizeof(struct iwl_scan_channel_cfg_umac) *
1729 mvm->fw->ucode_capa.n_scan_channels +
1730 sizeof(struct iwl_scan_req_umac_tail);
1731
1732 return sizeof(struct iwl_scan_req_lmac) +
1733 sizeof(struct iwl_scan_channel_cfg_lmac) *
1734 mvm->fw->ucode_capa.n_scan_channels +
1735 sizeof(struct iwl_scan_probe_req);
1736 }
1737
1738 /*
1739 * This function is used in nic restart flow, to inform mac80211 about scans
1740 * that was aborted by restart flow or by an assert.
1741 */
1742 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1743 {
1744 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1745 u32 uid, i;
1746
1747 uid = iwl_mvm_find_first_scan(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1748 if (uid < mvm->max_scans) {
1749 ieee80211_scan_completed(mvm->hw, true);
1750 mvm->scan_uid[uid] = 0;
1751 }
1752 uid = iwl_mvm_find_first_scan(mvm,
1753 IWL_UMAC_SCAN_UID_SCHED_SCAN);
1754 if (uid < mvm->max_scans && !mvm->restart_fw) {
1755 ieee80211_sched_scan_stopped(mvm->hw);
1756 mvm->scan_uid[uid] = 0;
1757 }
1758
1759 /* We shouldn't have any UIDs still set. Loop over all the
1760 * UIDs to make sure there's nothing left there and warn if
1761 * any is found.
1762 */
1763 for (i = 0; i < mvm->max_scans; i++) {
1764 if (WARN_ONCE(mvm->scan_uid[i],
1765 "UMAC scan UID %d was not cleaned\n",
1766 mvm->scan_uid[i]))
1767 mvm->scan_uid[i] = 0;
1768 }
1769 } else {
1770 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1771 ieee80211_scan_completed(mvm->hw, true);
1772
1773 /* Sched scan will be restarted by mac80211 in
1774 * restart_hw, so do not report if FW is about to be
1775 * restarted.
1776 */
1777 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1778 ieee80211_sched_scan_stopped(mvm->hw);
1779 }
1780 }
Linux kernel - Deliverables
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