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Merge tag 'iwlwifi-for-kalle-2015-07-30' of https://git.kernel.org/pub/scm/linux...
[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 "fw-api-scan.h"
71
72 #define IWL_DENSE_EBS_SCAN_RATIO 5
73 #define IWL_SPARSE_EBS_SCAN_RATIO 1
74
75 struct iwl_mvm_scan_params {
76 u32 max_out_time;
77 u32 suspend_time;
78 bool passive_fragmented;
79 u32 n_channels;
80 u16 delay;
81 int n_ssids;
82 struct cfg80211_ssid *ssids;
83 struct ieee80211_channel **channels;
84 u16 interval; /* interval between scans (in secs) */
85 u32 flags;
86 u8 *mac_addr;
87 u8 *mac_addr_mask;
88 bool no_cck;
89 bool pass_all;
90 int n_match_sets;
91 struct iwl_scan_probe_req preq;
92 struct cfg80211_match_set *match_sets;
93 struct _dwell {
94 u16 passive;
95 u16 active;
96 u16 fragmented;
97 } dwell[IEEE80211_NUM_BANDS];
98 struct {
99 u8 iterations;
100 u8 full_scan_mul; /* not used for UMAC */
101 } schedule[2];
102 };
103
104 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
105 {
106 if (mvm->scan_rx_ant != ANT_NONE)
107 return mvm->scan_rx_ant;
108 return iwl_mvm_get_valid_rx_ant(mvm);
109 }
110
111 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
112 {
113 u16 rx_chain;
114 u8 rx_ant;
115
116 rx_ant = iwl_mvm_scan_rx_ant(mvm);
117 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
118 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
119 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
120 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
121 return cpu_to_le16(rx_chain);
122 }
123
124 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
125 {
126 if (band == IEEE80211_BAND_2GHZ)
127 return cpu_to_le32(PHY_BAND_24);
128 else
129 return cpu_to_le32(PHY_BAND_5);
130 }
131
132 static inline __le32
133 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
134 bool no_cck)
135 {
136 u32 tx_ant;
137
138 mvm->scan_last_antenna_idx =
139 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
140 mvm->scan_last_antenna_idx);
141 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
142
143 if (band == IEEE80211_BAND_2GHZ && !no_cck)
144 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
145 tx_ant);
146 else
147 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
148 }
149
150 /*
151 * If req->n_ssids > 0, it means we should do an active scan.
152 * In case of active scan w/o directed scan, we receive a zero-length SSID
153 * just to notify that this scan is active and not passive.
154 * In order to notify the FW of the number of SSIDs we wish to scan (including
155 * the zero-length one), we need to set the corresponding bits in chan->type,
156 * one for each SSID, and set the active bit (first). If the first SSID is
157 * already included in the probe template, so we need to set only
158 * req->n_ssids - 1 bits in addition to the first bit.
159 */
160 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
161 enum ieee80211_band band, int n_ssids)
162 {
163 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_BASIC_DWELL))
164 return 10;
165 if (band == IEEE80211_BAND_2GHZ)
166 return 20 + 3 * (n_ssids + 1);
167 return 10 + 2 * (n_ssids + 1);
168 }
169
170 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
171 enum ieee80211_band band)
172 {
173 if (fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_BASIC_DWELL))
174 return 110;
175 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
176 }
177
178 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
179 struct ieee80211_vif *vif)
180 {
181 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
182 int *global_cnt = data;
183
184 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
185 mvmvif->phy_ctxt->id < MAX_PHYS)
186 *global_cnt += 1;
187 }
188
189 static void iwl_mvm_scan_calc_dwell(struct iwl_mvm *mvm,
190 struct ieee80211_vif *vif,
191 struct iwl_mvm_scan_params *params)
192 {
193 int global_cnt = 0;
194 enum ieee80211_band band;
195 u8 frag_passive_dwell = 0;
196
197 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
198 IEEE80211_IFACE_ITER_NORMAL,
199 iwl_mvm_scan_condition_iterator,
200 &global_cnt);
201 if (!global_cnt)
202 goto not_bound;
203
204 params->suspend_time = 30;
205 params->max_out_time = 120;
206
207 if (iwl_mvm_low_latency(mvm)) {
208 if (fw_has_api(&mvm->fw->ucode_capa,
209 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
210
211 params->suspend_time = 105;
212 /*
213 * If there is more than one active interface make
214 * passive scan more fragmented.
215 */
216 frag_passive_dwell = 40;
217 params->max_out_time = frag_passive_dwell;
218 } else {
219 params->suspend_time = 120;
220 params->max_out_time = 120;
221 }
222 }
223
224 if (frag_passive_dwell &&
225 fw_has_api(&mvm->fw->ucode_capa,
226 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
227 /*
228 * P2P device scan should not be fragmented to avoid negative
229 * impact on P2P device discovery. Configure max_out_time to be
230 * equal to dwell time on passive channel. Take a longest
231 * possible value, one that corresponds to 2GHz band
232 */
233 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
234 u32 passive_dwell =
235 iwl_mvm_get_passive_dwell(mvm,
236 IEEE80211_BAND_2GHZ);
237 params->max_out_time = passive_dwell;
238 } else {
239 params->passive_fragmented = true;
240 }
241 }
242
243 if ((params->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
244 (params->max_out_time > 200))
245 params->max_out_time = 200;
246
247 not_bound:
248
249 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
250 if (params->passive_fragmented)
251 params->dwell[band].fragmented = frag_passive_dwell;
252
253 params->dwell[band].passive = iwl_mvm_get_passive_dwell(mvm,
254 band);
255 params->dwell[band].active =
256 iwl_mvm_get_active_dwell(mvm, band, params->n_ssids);
257 }
258
259 IWL_DEBUG_SCAN(mvm,
260 "scan parameters: max_out_time %d, suspend_time %d, passive_fragmented %d\n",
261 params->max_out_time, params->suspend_time,
262 params->passive_fragmented);
263 IWL_DEBUG_SCAN(mvm,
264 "dwell[IEEE80211_BAND_2GHZ]: passive %d, active %d, fragmented %d\n",
265 params->dwell[IEEE80211_BAND_2GHZ].passive,
266 params->dwell[IEEE80211_BAND_2GHZ].active,
267 params->dwell[IEEE80211_BAND_2GHZ].fragmented);
268 IWL_DEBUG_SCAN(mvm,
269 "dwell[IEEE80211_BAND_5GHZ]: passive %d, active %d, fragmented %d\n",
270 params->dwell[IEEE80211_BAND_5GHZ].passive,
271 params->dwell[IEEE80211_BAND_5GHZ].active,
272 params->dwell[IEEE80211_BAND_5GHZ].fragmented);
273 }
274
275 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
276 {
277 /* require rrm scan whenever the fw supports it */
278 return fw_has_capa(&mvm->fw->ucode_capa,
279 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
280 }
281
282 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
283 {
284 int max_probe_len;
285
286 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
287
288 /* we create the 802.11 header and SSID element */
289 max_probe_len -= 24 + 2;
290
291 /* DS parameter set element is added on 2.4GHZ band if required */
292 if (iwl_mvm_rrm_scan_needed(mvm))
293 max_probe_len -= 3;
294
295 return max_probe_len;
296 }
297
298 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
299 {
300 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
301
302 /* TODO: [BUG] This function should return the maximum allowed size of
303 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
304 * in the same command. So the correct implementation of this function
305 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
306 * command has only 512 bytes and it would leave us with about 240
307 * bytes for scan IEs, which is clearly not enough. So meanwhile
308 * we will report an incorrect value. This may result in a failure to
309 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
310 * functions with -ENOBUFS, if a large enough probe will be provided.
311 */
312 return max_ie_len;
313 }
314
315 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
316 int num_res, u8 *buf, size_t buf_size)
317 {
318 int i;
319 u8 *pos = buf, *end = buf + buf_size;
320
321 for (i = 0; pos < end && i < num_res; i++)
322 pos += snprintf(pos, end - pos, " %u", res[i].channel);
323
324 /* terminate the string in case the buffer was too short */
325 *(buf + buf_size - 1) = '\0';
326
327 return buf;
328 }
329
330 int iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
331 struct iwl_rx_cmd_buffer *rxb,
332 struct iwl_device_cmd *cmd)
333 {
334 struct iwl_rx_packet *pkt = rxb_addr(rxb);
335 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
336 u8 buf[256];
337
338 IWL_DEBUG_SCAN(mvm,
339 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
340 notif->status, notif->scanned_channels,
341 iwl_mvm_dump_channel_list(notif->results,
342 notif->scanned_channels, buf,
343 sizeof(buf)));
344 return 0;
345 }
346
347 int iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
348 struct iwl_rx_cmd_buffer *rxb,
349 struct iwl_device_cmd *cmd)
350 {
351 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
352 ieee80211_sched_scan_results(mvm->hw);
353
354 return 0;
355 }
356
357 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
358 {
359 switch (status) {
360 case IWL_SCAN_EBS_SUCCESS:
361 return "successful";
362 case IWL_SCAN_EBS_INACTIVE:
363 return "inactive";
364 case IWL_SCAN_EBS_FAILED:
365 case IWL_SCAN_EBS_CHAN_NOT_FOUND:
366 default:
367 return "failed";
368 }
369 }
370
371 int iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
372 struct iwl_rx_cmd_buffer *rxb,
373 struct iwl_device_cmd *cmd)
374 {
375 struct iwl_rx_packet *pkt = rxb_addr(rxb);
376 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
377 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
378
379 /* scan status must be locked for proper checking */
380 lockdep_assert_held(&mvm->mutex);
381
382 /* We first check if we were stopping a scan, in which case we
383 * just clear the stopping flag. Then we check if it was a
384 * firmware initiated stop, in which case we need to inform
385 * mac80211.
386 * Note that we can have a stopping and a running scan
387 * simultaneously, but we can't have two different types of
388 * scans stopping or running at the same time (since LMAC
389 * doesn't support it).
390 */
391
392 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
393 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
394
395 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
396 aborted ? "aborted" : "completed",
397 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
398
399 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
400 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
401 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
402 aborted ? "aborted" : "completed",
403 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
404
405 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
406 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
407 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
408
409 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s (FW)\n",
410 aborted ? "aborted" : "completed",
411 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
412
413 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
414 ieee80211_sched_scan_stopped(mvm->hw);
415 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
416 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
417 aborted ? "aborted" : "completed",
418 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
419
420 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
421 ieee80211_scan_completed(mvm->hw,
422 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
423 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
424 }
425
426 mvm->last_ebs_successful =
427 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
428 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
429
430 return 0;
431 }
432
433 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
434 {
435 int i;
436
437 for (i = 0; i < PROBE_OPTION_MAX; i++) {
438 if (!ssid_list[i].len)
439 break;
440 if (ssid_list[i].len == ssid_len &&
441 !memcmp(ssid_list->ssid, ssid, ssid_len))
442 return i;
443 }
444 return -1;
445 }
446
447 /* We insert the SSIDs in an inverted order, because the FW will
448 * invert it back.
449 */
450 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
451 struct iwl_ssid_ie *ssids,
452 u32 *ssid_bitmap)
453 {
454 int i, j;
455 int index;
456
457 /*
458 * copy SSIDs from match list.
459 * iwl_config_sched_scan_profiles() uses the order of these ssids to
460 * config match list.
461 */
462 for (i = 0, j = params->n_match_sets - 1;
463 j >= 0 && i < PROBE_OPTION_MAX;
464 i++, j--) {
465 /* skip empty SSID matchsets */
466 if (!params->match_sets[j].ssid.ssid_len)
467 continue;
468 ssids[i].id = WLAN_EID_SSID;
469 ssids[i].len = params->match_sets[j].ssid.ssid_len;
470 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
471 ssids[i].len);
472 }
473
474 /* add SSIDs from scan SSID list */
475 *ssid_bitmap = 0;
476 for (j = params->n_ssids - 1;
477 j >= 0 && i < PROBE_OPTION_MAX;
478 i++, j--) {
479 index = iwl_ssid_exist(params->ssids[j].ssid,
480 params->ssids[j].ssid_len,
481 ssids);
482 if (index < 0) {
483 ssids[i].id = WLAN_EID_SSID;
484 ssids[i].len = params->ssids[j].ssid_len;
485 memcpy(ssids[i].ssid, params->ssids[j].ssid,
486 ssids[i].len);
487 *ssid_bitmap |= BIT(i);
488 } else {
489 *ssid_bitmap |= BIT(index);
490 }
491 }
492 }
493
494 static int
495 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
496 struct cfg80211_sched_scan_request *req)
497 {
498 struct iwl_scan_offload_profile *profile;
499 struct iwl_scan_offload_profile_cfg *profile_cfg;
500 struct iwl_scan_offload_blacklist *blacklist;
501 struct iwl_host_cmd cmd = {
502 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
503 .len[1] = sizeof(*profile_cfg),
504 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
505 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
506 };
507 int blacklist_len;
508 int i;
509 int ret;
510
511 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
512 return -EIO;
513
514 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
515 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
516 else
517 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
518
519 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
520 if (!blacklist)
521 return -ENOMEM;
522
523 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
524 if (!profile_cfg) {
525 ret = -ENOMEM;
526 goto free_blacklist;
527 }
528
529 cmd.data[0] = blacklist;
530 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
531 cmd.data[1] = profile_cfg;
532
533 /* No blacklist configuration */
534
535 profile_cfg->num_profiles = req->n_match_sets;
536 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
537 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
538 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
539 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
540 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
541
542 for (i = 0; i < req->n_match_sets; i++) {
543 profile = &profile_cfg->profiles[i];
544 profile->ssid_index = i;
545 /* Support any cipher and auth algorithm */
546 profile->unicast_cipher = 0xff;
547 profile->auth_alg = 0xff;
548 profile->network_type = IWL_NETWORK_TYPE_ANY;
549 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
550 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
551 }
552
553 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
554
555 ret = iwl_mvm_send_cmd(mvm, &cmd);
556 kfree(profile_cfg);
557 free_blacklist:
558 kfree(blacklist);
559
560 return ret;
561 }
562
563 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
564 struct cfg80211_sched_scan_request *req)
565 {
566 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
567 IWL_DEBUG_SCAN(mvm,
568 "Sending scheduled scan with filtering, n_match_sets %d\n",
569 req->n_match_sets);
570 return false;
571 }
572
573 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
574 return true;
575 }
576
577 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
578 {
579 int ret;
580 struct iwl_host_cmd cmd = {
581 .id = SCAN_OFFLOAD_ABORT_CMD,
582 };
583 u32 status;
584
585 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
586 if (ret)
587 return ret;
588
589 if (status != CAN_ABORT_STATUS) {
590 /*
591 * The scan abort will return 1 for success or
592 * 2 for "failure". A failure condition can be
593 * due to simply not being in an active scan which
594 * can occur if we send the scan abort before the
595 * microcode has notified us that a scan is completed.
596 */
597 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
598 ret = -ENOENT;
599 }
600
601 return ret;
602 }
603
604 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
605 struct iwl_scan_req_tx_cmd *tx_cmd,
606 bool no_cck)
607 {
608 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
609 TX_CMD_FLG_BT_DIS);
610 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
611 IEEE80211_BAND_2GHZ,
612 no_cck);
613 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
614
615 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
616 TX_CMD_FLG_BT_DIS);
617 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
618 IEEE80211_BAND_5GHZ,
619 no_cck);
620 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
621 }
622
623 static void
624 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
625 struct ieee80211_channel **channels,
626 int n_channels, u32 ssid_bitmap,
627 struct iwl_scan_req_lmac *cmd)
628 {
629 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
630 int i;
631
632 for (i = 0; i < n_channels; i++) {
633 channel_cfg[i].channel_num =
634 cpu_to_le16(channels[i]->hw_value);
635 channel_cfg[i].iter_count = cpu_to_le16(1);
636 channel_cfg[i].iter_interval = 0;
637 channel_cfg[i].flags =
638 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
639 ssid_bitmap);
640 }
641 }
642
643 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
644 size_t len, u8 *const pos)
645 {
646 static const u8 before_ds_params[] = {
647 WLAN_EID_SSID,
648 WLAN_EID_SUPP_RATES,
649 WLAN_EID_REQUEST,
650 WLAN_EID_EXT_SUPP_RATES,
651 };
652 size_t offs;
653 u8 *newpos = pos;
654
655 if (!iwl_mvm_rrm_scan_needed(mvm)) {
656 memcpy(newpos, ies, len);
657 return newpos + len;
658 }
659
660 offs = ieee80211_ie_split(ies, len,
661 before_ds_params,
662 ARRAY_SIZE(before_ds_params),
663 0);
664
665 memcpy(newpos, ies, offs);
666 newpos += offs;
667
668 /* Add a placeholder for DS Parameter Set element */
669 *newpos++ = WLAN_EID_DS_PARAMS;
670 *newpos++ = 1;
671 *newpos++ = 0;
672
673 memcpy(newpos, ies + offs, len - offs);
674 newpos += len - offs;
675
676 return newpos;
677 }
678
679 static void
680 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
681 struct ieee80211_scan_ies *ies,
682 struct iwl_mvm_scan_params *params)
683 {
684 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
685 u8 *pos, *newpos;
686 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
687 params->mac_addr : NULL;
688
689 /*
690 * Unfortunately, right now the offload scan doesn't support randomising
691 * within the firmware, so until the firmware API is ready we implement
692 * it in the driver. This means that the scan iterations won't really be
693 * random, only when it's restarted, but at least that helps a bit.
694 */
695 if (mac_addr)
696 get_random_mask_addr(frame->sa, mac_addr,
697 params->mac_addr_mask);
698 else
699 memcpy(frame->sa, vif->addr, ETH_ALEN);
700
701 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
702 eth_broadcast_addr(frame->da);
703 eth_broadcast_addr(frame->bssid);
704 frame->seq_ctrl = 0;
705
706 pos = frame->u.probe_req.variable;
707 *pos++ = WLAN_EID_SSID;
708 *pos++ = 0;
709
710 params->preq.mac_header.offset = 0;
711 params->preq.mac_header.len = cpu_to_le16(24 + 2);
712
713 /* Insert ds parameter set element on 2.4 GHz band */
714 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
715 ies->ies[IEEE80211_BAND_2GHZ],
716 ies->len[IEEE80211_BAND_2GHZ],
717 pos);
718 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
719 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
720 pos = newpos;
721
722 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
723 ies->len[IEEE80211_BAND_5GHZ]);
724 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
725 params->preq.band_data[1].len =
726 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
727 pos += ies->len[IEEE80211_BAND_5GHZ];
728
729 memcpy(pos, ies->common_ies, ies->common_ie_len);
730 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
731 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
732 }
733
734 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm,
735 enum iwl_scan_priority_ext prio)
736 {
737 if (fw_has_api(&mvm->fw->ucode_capa,
738 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY))
739 return cpu_to_le32(prio);
740
741 if (prio <= IWL_SCAN_PRIORITY_EXT_2)
742 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
743
744 if (prio <= IWL_SCAN_PRIORITY_EXT_4)
745 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
746
747 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
748 }
749
750 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
751 struct iwl_scan_req_lmac *cmd,
752 struct iwl_mvm_scan_params *params)
753 {
754 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
755 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
756 if (params->passive_fragmented)
757 cmd->fragmented_dwell =
758 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
759 cmd->max_out_time = cpu_to_le32(params->max_out_time);
760 cmd->suspend_time = cpu_to_le32(params->suspend_time);
761 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
762 }
763
764 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
765 struct ieee80211_scan_ies *ies,
766 int n_channels)
767 {
768 return ((n_ssids <= PROBE_OPTION_MAX) &&
769 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
770 (ies->common_ie_len +
771 ies->len[NL80211_BAND_2GHZ] +
772 ies->len[NL80211_BAND_5GHZ] <=
773 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
774 }
775
776 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
777 struct ieee80211_vif *vif,
778 int n_iterations)
779 {
780 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
781
782 /* We can only use EBS if:
783 * 1. the feature is supported;
784 * 2. the last EBS was successful;
785 * 3. if only single scan, the single scan EBS API is supported;
786 * 4. it's not a p2p find operation.
787 */
788 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
789 mvm->last_ebs_successful &&
790 (n_iterations > 1 ||
791 fw_has_api(capa, IWL_UCODE_TLV_API_SINGLE_SCAN_EBS)) &&
792 vif->type != NL80211_IFTYPE_P2P_DEVICE);
793 }
794
795 static int iwl_mvm_scan_total_iterations(struct iwl_mvm_scan_params *params)
796 {
797 return params->schedule[0].iterations + params->schedule[1].iterations;
798 }
799
800 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
801 struct iwl_mvm_scan_params *params)
802 {
803 int flags = 0;
804
805 if (params->n_ssids == 0)
806 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
807
808 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
809 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
810
811 if (params->passive_fragmented)
812 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
813
814 if (iwl_mvm_rrm_scan_needed(mvm))
815 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
816
817 if (params->pass_all)
818 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
819 else
820 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
821
822 #ifdef CONFIG_IWLWIFI_DEBUGFS
823 if (mvm->scan_iter_notif_enabled)
824 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
825 #endif
826
827 return flags;
828 }
829
830 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
831 struct iwl_mvm_scan_params *params)
832 {
833 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
834 struct iwl_scan_probe_req *preq =
835 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
836 mvm->fw->ucode_capa.n_scan_channels);
837 u32 ssid_bitmap = 0;
838 int n_iterations = iwl_mvm_scan_total_iterations(params);
839
840 lockdep_assert_held(&mvm->mutex);
841
842 memset(cmd, 0, ksize(cmd));
843
844 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
845
846 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
847 cmd->iter_num = cpu_to_le32(1);
848 cmd->n_channels = (u8)params->n_channels;
849
850 cmd->delay = cpu_to_le32(params->delay);
851
852 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params));
853
854 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
855 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
856 MAC_FILTER_IN_BEACON);
857 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
858 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
859
860 /* this API uses bits 1-20 instead of 0-19 */
861 ssid_bitmap <<= 1;
862
863 cmd->schedule[0].delay = cpu_to_le16(params->interval);
864 cmd->schedule[0].iterations = params->schedule[0].iterations;
865 cmd->schedule[0].full_scan_mul = params->schedule[0].full_scan_mul;
866 cmd->schedule[1].delay = cpu_to_le16(params->interval);
867 cmd->schedule[1].iterations = params->schedule[1].iterations;
868 cmd->schedule[1].full_scan_mul = params->schedule[1].iterations;
869
870 if (iwl_mvm_scan_use_ebs(mvm, vif, n_iterations)) {
871 cmd->channel_opt[0].flags =
872 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
873 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
874 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
875 cmd->channel_opt[0].non_ebs_ratio =
876 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
877 cmd->channel_opt[1].flags =
878 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
879 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
880 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
881 cmd->channel_opt[1].non_ebs_ratio =
882 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
883 }
884
885 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
886 params->n_channels, ssid_bitmap, cmd);
887
888 *preq = params->preq;
889
890 return 0;
891 }
892
893 static int rate_to_scan_rate_flag(unsigned int rate)
894 {
895 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
896 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
897 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
898 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
899 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
900 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
901 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
902 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
903 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
904 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
905 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
906 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
907 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
908 };
909
910 return rate_to_scan_rate[rate];
911 }
912
913 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
914 {
915 struct ieee80211_supported_band *band;
916 unsigned int rates = 0;
917 int i;
918
919 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
920 for (i = 0; i < band->n_bitrates; i++)
921 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
922 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
923 for (i = 0; i < band->n_bitrates; i++)
924 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
925
926 /* Set both basic rates and supported rates */
927 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
928
929 return cpu_to_le32(rates);
930 }
931
932 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
933 {
934
935 struct iwl_scan_config *scan_config;
936 struct ieee80211_supported_band *band;
937 int num_channels =
938 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
939 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
940 int ret, i, j = 0, cmd_size, data_size;
941 struct iwl_host_cmd cmd = {
942 .id = SCAN_CFG_CMD,
943 };
944
945 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
946 return -ENOBUFS;
947
948 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
949
950 scan_config = kzalloc(cmd_size, GFP_KERNEL);
951 if (!scan_config)
952 return -ENOMEM;
953
954 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
955 scan_config->hdr.size = cpu_to_le16(data_size);
956 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
957 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
958 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
959 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
960 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
961 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
962 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
963 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
964 SCAN_CONFIG_N_CHANNELS(num_channels));
965 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
966 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
967 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
968 scan_config->out_of_channel_time = cpu_to_le32(170);
969 scan_config->suspend_time = cpu_to_le32(30);
970 scan_config->dwell_active = 20;
971 scan_config->dwell_passive = 110;
972 scan_config->dwell_fragmented = 20;
973
974 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
975
976 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
977 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
978 IWL_CHANNEL_FLAG_ACCURATE_EBS |
979 IWL_CHANNEL_FLAG_EBS_ADD |
980 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
981
982 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
983 for (i = 0; i < band->n_channels; i++, j++)
984 scan_config->channel_array[j] = band->channels[i].hw_value;
985 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
986 for (i = 0; i < band->n_channels; i++, j++)
987 scan_config->channel_array[j] = band->channels[i].hw_value;
988
989 cmd.data[0] = scan_config;
990 cmd.len[0] = cmd_size;
991 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
992
993 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
994
995 ret = iwl_mvm_send_cmd(mvm, &cmd);
996
997 kfree(scan_config);
998 return ret;
999 }
1000
1001 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1002 {
1003 int i;
1004
1005 for (i = 0; i < mvm->max_scans; i++)
1006 if (mvm->scan_uid_status[i] == status)
1007 return i;
1008
1009 return -ENOENT;
1010 }
1011
1012 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1013 struct iwl_scan_req_umac *cmd,
1014 struct iwl_mvm_scan_params *params)
1015 {
1016 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1017 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1018 if (params->passive_fragmented)
1019 cmd->fragmented_dwell =
1020 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
1021 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1022 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1023 cmd->scan_priority =
1024 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1025
1026 if (iwl_mvm_scan_total_iterations(params) == 1)
1027 cmd->ooc_priority =
1028 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1029 else
1030 cmd->ooc_priority =
1031 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
1032 }
1033
1034 static void
1035 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1036 struct ieee80211_channel **channels,
1037 int n_channels, u32 ssid_bitmap,
1038 struct iwl_scan_req_umac *cmd)
1039 {
1040 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1041 int i;
1042
1043 for (i = 0; i < n_channels; i++) {
1044 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1045 channel_cfg[i].channel_num = channels[i]->hw_value;
1046 channel_cfg[i].iter_count = 1;
1047 channel_cfg[i].iter_interval = 0;
1048 }
1049 }
1050
1051 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1052 struct iwl_mvm_scan_params *params)
1053 {
1054 int flags = 0;
1055
1056 if (params->n_ssids == 0)
1057 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1058
1059 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1060 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1061
1062 if (params->passive_fragmented)
1063 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1064
1065 if (iwl_mvm_rrm_scan_needed(mvm))
1066 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1067
1068 if (params->pass_all)
1069 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1070 else
1071 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1072
1073 if (iwl_mvm_scan_total_iterations(params) > 1)
1074 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1075
1076 #ifdef CONFIG_IWLWIFI_DEBUGFS
1077 if (mvm->scan_iter_notif_enabled)
1078 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1079 #endif
1080 return flags;
1081 }
1082
1083 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1084 struct iwl_mvm_scan_params *params,
1085 int type)
1086 {
1087 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1088 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1089 sizeof(struct iwl_scan_channel_cfg_umac) *
1090 mvm->fw->ucode_capa.n_scan_channels;
1091 int uid;
1092 u32 ssid_bitmap = 0;
1093 int n_iterations = iwl_mvm_scan_total_iterations(params);
1094
1095 lockdep_assert_held(&mvm->mutex);
1096
1097 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1098 if (uid < 0)
1099 return uid;
1100
1101 memset(cmd, 0, ksize(cmd));
1102 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1103 sizeof(struct iwl_mvm_umac_cmd_hdr));
1104
1105 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1106
1107 mvm->scan_uid_status[uid] = type;
1108
1109 cmd->uid = cpu_to_le32(uid);
1110 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params));
1111
1112 if (type == IWL_MVM_SCAN_SCHED)
1113 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1114
1115 if (iwl_mvm_scan_use_ebs(mvm, vif, n_iterations))
1116 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1117 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1118 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1119
1120 cmd->n_channels = params->n_channels;
1121
1122 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1123
1124 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1125 params->n_channels, ssid_bitmap, cmd);
1126
1127 /* With UMAC we use only one schedule for now, so use the sum
1128 * of the iterations (with a a maximum of 255).
1129 */
1130 sec_part->schedule[0].iter_count =
1131 (n_iterations > 255) ? 255 : n_iterations;
1132 sec_part->schedule[0].interval = cpu_to_le16(params->interval);
1133
1134 sec_part->delay = cpu_to_le16(params->delay);
1135 sec_part->preq = params->preq;
1136
1137 return 0;
1138 }
1139
1140 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1141 {
1142 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1143 }
1144
1145 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1146 {
1147 /* This looks a bit arbitrary, but the idea is that if we run
1148 * out of possible simultaneous scans and the userspace is
1149 * trying to run a scan type that is already running, we
1150 * return -EBUSY. But if the userspace wants to start a
1151 * different type of scan, we stop the opposite type to make
1152 * space for the new request. The reason is backwards
1153 * compatibility with old wpa_supplicant that wouldn't stop a
1154 * scheduled scan before starting a normal scan.
1155 */
1156
1157 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1158 return 0;
1159
1160 /* Use a switch, even though this is a bitmask, so that more
1161 * than one bits set will fall in default and we will warn.
1162 */
1163 switch (type) {
1164 case IWL_MVM_SCAN_REGULAR:
1165 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1166 return -EBUSY;
1167 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1168 case IWL_MVM_SCAN_SCHED:
1169 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1170 return -EBUSY;
1171 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1172 case IWL_MVM_SCAN_NETDETECT:
1173 /* No need to stop anything for net-detect since the
1174 * firmware is restarted anyway. This way, any sched
1175 * scans that were running will be restarted when we
1176 * resume.
1177 */
1178 return 0;
1179 default:
1180 WARN_ON(1);
1181 break;
1182 }
1183
1184 return -EIO;
1185 }
1186
1187 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1188 struct cfg80211_scan_request *req,
1189 struct ieee80211_scan_ies *ies)
1190 {
1191 struct iwl_host_cmd hcmd = {
1192 .len = { iwl_mvm_scan_size(mvm), },
1193 .data = { mvm->scan_cmd, },
1194 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1195 };
1196 struct iwl_mvm_scan_params params = {};
1197 int ret;
1198
1199 lockdep_assert_held(&mvm->mutex);
1200
1201 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1202 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1203 return -EBUSY;
1204 }
1205
1206 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1207 if (ret)
1208 return ret;
1209
1210 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1211
1212 /* we should have failed registration if scan_cmd was NULL */
1213 if (WARN_ON(!mvm->scan_cmd))
1214 return -ENOMEM;
1215
1216 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1217 return -ENOBUFS;
1218
1219 params.n_ssids = req->n_ssids;
1220 params.flags = req->flags;
1221 params.n_channels = req->n_channels;
1222 params.delay = 0;
1223 params.interval = 0;
1224 params.ssids = req->ssids;
1225 params.channels = req->channels;
1226 params.mac_addr = req->mac_addr;
1227 params.mac_addr_mask = req->mac_addr_mask;
1228 params.no_cck = req->no_cck;
1229 params.pass_all = true;
1230 params.n_match_sets = 0;
1231 params.match_sets = NULL;
1232
1233 params.schedule[0].iterations = 1;
1234 params.schedule[0].full_scan_mul = 0;
1235 params.schedule[1].iterations = 0;
1236 params.schedule[1].full_scan_mul = 0;
1237
1238 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1239
1240 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1241
1242 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1243 hcmd.id = SCAN_REQ_UMAC;
1244 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1245 IWL_MVM_SCAN_REGULAR);
1246 } else {
1247 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1248 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1249 }
1250
1251 if (ret)
1252 return ret;
1253
1254 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1255 if (!ret) {
1256 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1257 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1258 } else {
1259 /* If the scan failed, it usually means that the FW was unable
1260 * to allocate the time events. Warn on it, but maybe we
1261 * should try to send the command again with different params.
1262 */
1263 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1264 }
1265
1266 if (ret)
1267 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1268
1269 return ret;
1270 }
1271
1272 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1273 struct ieee80211_vif *vif,
1274 struct cfg80211_sched_scan_request *req,
1275 struct ieee80211_scan_ies *ies,
1276 int type)
1277 {
1278 struct iwl_host_cmd hcmd = {
1279 .len = { iwl_mvm_scan_size(mvm), },
1280 .data = { mvm->scan_cmd, },
1281 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1282 };
1283 struct iwl_mvm_scan_params params = {};
1284 int ret;
1285
1286 lockdep_assert_held(&mvm->mutex);
1287
1288 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1289 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1290 return -EBUSY;
1291 }
1292
1293 ret = iwl_mvm_check_running_scans(mvm, type);
1294 if (ret)
1295 return ret;
1296
1297 /* we should have failed registration if scan_cmd was NULL */
1298 if (WARN_ON(!mvm->scan_cmd))
1299 return -ENOMEM;
1300
1301 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1302 return -ENOBUFS;
1303
1304 params.n_ssids = req->n_ssids;
1305 params.flags = req->flags;
1306 params.n_channels = req->n_channels;
1307 params.ssids = req->ssids;
1308 params.channels = req->channels;
1309 params.mac_addr = req->mac_addr;
1310 params.mac_addr_mask = req->mac_addr_mask;
1311 params.no_cck = false;
1312 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1313 params.n_match_sets = req->n_match_sets;
1314 params.match_sets = req->match_sets;
1315
1316 params.schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1317 params.schedule[0].full_scan_mul = 1;
1318 params.schedule[1].iterations = 0xff;
1319 params.schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1320
1321 if (req->interval > U16_MAX) {
1322 IWL_DEBUG_SCAN(mvm,
1323 "interval value is > 16-bits, set to max possible\n");
1324 params.interval = U16_MAX;
1325 } else {
1326 params.interval = req->interval / MSEC_PER_SEC;
1327 }
1328
1329 /* In theory, LMAC scans can handle a 32-bit delay, but since
1330 * waiting for over 18 hours to start the scan is a bit silly
1331 * and to keep it aligned with UMAC scans (which only support
1332 * 16-bit delays), trim it down to 16-bits.
1333 */
1334 if (req->delay > U16_MAX) {
1335 IWL_DEBUG_SCAN(mvm,
1336 "delay value is > 16-bits, set to max possible\n");
1337 params.delay = U16_MAX;
1338 } else {
1339 params.delay = req->delay;
1340 }
1341
1342 iwl_mvm_scan_calc_dwell(mvm, vif, &params);
1343
1344 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1345 if (ret)
1346 return ret;
1347
1348 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1349
1350 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1351 hcmd.id = SCAN_REQ_UMAC;
1352 ret = iwl_mvm_scan_umac(mvm, vif, &params, IWL_MVM_SCAN_SCHED);
1353 } else {
1354 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1355 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1356 }
1357
1358 if (ret)
1359 return ret;
1360
1361 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1362 if (!ret) {
1363 IWL_DEBUG_SCAN(mvm,
1364 "Sched scan request was sent successfully\n");
1365 mvm->scan_status |= type;
1366 } else {
1367 /* If the scan failed, it usually means that the FW was unable
1368 * to allocate the time events. Warn on it, but maybe we
1369 * should try to send the command again with different params.
1370 */
1371 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1372 }
1373
1374 return ret;
1375 }
1376
1377 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1378 struct iwl_rx_cmd_buffer *rxb,
1379 struct iwl_device_cmd *cmd)
1380 {
1381 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1382 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1383 u32 uid = __le32_to_cpu(notif->uid);
1384 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1385
1386 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1387 return 0;
1388
1389 /* if the scan is already stopping, we don't need to notify mac80211 */
1390 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1391 ieee80211_scan_completed(mvm->hw, aborted);
1392 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1393 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1394 ieee80211_sched_scan_stopped(mvm->hw);
1395 }
1396
1397 mvm->scan_status &= ~mvm->scan_uid_status[uid];
1398
1399 IWL_DEBUG_SCAN(mvm,
1400 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1401 uid, mvm->scan_uid_status[uid],
1402 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1403 "completed" : "aborted",
1404 iwl_mvm_ebs_status_str(notif->ebs_status));
1405
1406 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1407 notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1408 mvm->last_ebs_successful = false;
1409
1410 mvm->scan_uid_status[uid] = 0;
1411
1412 return 0;
1413 }
1414
1415 int iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1416 struct iwl_rx_cmd_buffer *rxb,
1417 struct iwl_device_cmd *cmd)
1418 {
1419 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1420 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1421 u8 buf[256];
1422
1423 IWL_DEBUG_SCAN(mvm,
1424 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1425 notif->status, notif->scanned_channels,
1426 iwl_mvm_dump_channel_list(notif->results,
1427 notif->scanned_channels, buf,
1428 sizeof(buf)));
1429 return 0;
1430 }
1431
1432 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1433 {
1434 struct iwl_umac_scan_abort cmd = {
1435 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
1436 sizeof(struct iwl_mvm_umac_cmd_hdr)),
1437 };
1438 int uid, ret;
1439
1440 lockdep_assert_held(&mvm->mutex);
1441
1442 /* We should always get a valid index here, because we already
1443 * checked that this type of scan was running in the generic
1444 * code.
1445 */
1446 uid = iwl_mvm_scan_uid_by_status(mvm, type);
1447 if (WARN_ON_ONCE(uid < 0))
1448 return uid;
1449
1450 cmd.uid = cpu_to_le32(uid);
1451
1452 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1453
1454 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
1455 if (!ret)
1456 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1457
1458 return ret;
1459 }
1460
1461 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1462 {
1463 struct iwl_notification_wait wait_scan_done;
1464 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1465 SCAN_OFFLOAD_COMPLETE, };
1466 int ret;
1467
1468 lockdep_assert_held(&mvm->mutex);
1469
1470 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1471 scan_done_notif,
1472 ARRAY_SIZE(scan_done_notif),
1473 NULL, NULL);
1474
1475 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1476
1477 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1478 ret = iwl_mvm_umac_scan_abort(mvm, type);
1479 else
1480 ret = iwl_mvm_lmac_scan_abort(mvm);
1481
1482 if (ret) {
1483 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1484 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1485 return ret;
1486 }
1487
1488 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1489
1490 return ret;
1491 }
1492
1493 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1494 {
1495 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1496 return sizeof(struct iwl_scan_req_umac) +
1497 sizeof(struct iwl_scan_channel_cfg_umac) *
1498 mvm->fw->ucode_capa.n_scan_channels +
1499 sizeof(struct iwl_scan_req_umac_tail);
1500
1501 return sizeof(struct iwl_scan_req_lmac) +
1502 sizeof(struct iwl_scan_channel_cfg_lmac) *
1503 mvm->fw->ucode_capa.n_scan_channels +
1504 sizeof(struct iwl_scan_probe_req);
1505 }
1506
1507 /*
1508 * This function is used in nic restart flow, to inform mac80211 about scans
1509 * that was aborted by restart flow or by an assert.
1510 */
1511 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1512 {
1513 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1514 int uid, i;
1515
1516 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1517 if (uid >= 0) {
1518 ieee80211_scan_completed(mvm->hw, true);
1519 mvm->scan_uid_status[uid] = 0;
1520 }
1521 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1522 if (uid >= 0 && !mvm->restart_fw) {
1523 ieee80211_sched_scan_stopped(mvm->hw);
1524 mvm->scan_uid_status[uid] = 0;
1525 }
1526
1527 /* We shouldn't have any UIDs still set. Loop over all the
1528 * UIDs to make sure there's nothing left there and warn if
1529 * any is found.
1530 */
1531 for (i = 0; i < mvm->max_scans; i++) {
1532 if (WARN_ONCE(mvm->scan_uid_status[i],
1533 "UMAC scan UID %d status was not cleaned\n",
1534 i))
1535 mvm->scan_uid_status[i] = 0;
1536 }
1537 } else {
1538 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1539 ieee80211_scan_completed(mvm->hw, true);
1540
1541 /* Sched scan will be restarted by mac80211 in
1542 * restart_hw, so do not report if FW is about to be
1543 * restarted.
1544 */
1545 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1546 ieee80211_sched_scan_stopped(mvm->hw);
1547 }
1548 }
1549
1550 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1551 {
1552 int ret;
1553
1554 if (!(mvm->scan_status & type))
1555 return 0;
1556
1557 if (iwl_mvm_is_radio_killed(mvm)) {
1558 ret = 0;
1559 goto out;
1560 }
1561
1562 ret = iwl_mvm_scan_stop_wait(mvm, type);
1563 if (!ret)
1564 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1565 out:
1566 /* Clear the scan status so the next scan requests will
1567 * succeed and mark the scan as stopping, so that the Rx
1568 * handler doesn't do anything, as the scan was stopped from
1569 * above.
1570 */
1571 mvm->scan_status &= ~type;
1572
1573 if (type == IWL_MVM_SCAN_REGULAR) {
1574 /* Since the rx handler won't do anything now, we have
1575 * to release the scan reference here.
1576 */
1577 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1578 if (notify)
1579 ieee80211_scan_completed(mvm->hw, true);
1580 } else if (notify) {
1581 ieee80211_sched_scan_stopped(mvm->hw);
1582 }
1583
1584 return ret;
1585 }
Linux kernel - Deliverables
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