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authorKalle Valo <kvalo@codeaurora.org>2015-11-17 13:57:38 -0500
committerKalle Valo <kvalo@codeaurora.org>2015-11-18 07:28:30 -0500
commite705c12146aa9c69ca498d4ebb83ba7138f9b41f (patch)
treeb55d4eb7a83c2ec117f460684eb71c89eee6a709 /drivers/net/wireless/intel/iwlwifi/mvm/scan.c
parent7ac9a364c1721a863ecc6cc9aba66e10114908db (diff)
iwlwifi: move under intel vendor directory
Part of reorganising wireless drivers directory and Kconfig. Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/mvm/scan.c')
-rw-r--r--drivers/net/wireless/intel/iwlwifi/mvm/scan.c1552
1 files changed, 1552 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/scan.c b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
new file mode 100644
index 000000000000..d6e0c1b5c20c
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/scan.c
@@ -0,0 +1,1552 @@
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
75enum iwl_mvm_scan_type {
76 IWL_SCAN_TYPE_UNASSOC,
77 IWL_SCAN_TYPE_WILD,
78 IWL_SCAN_TYPE_MILD,
79 IWL_SCAN_TYPE_FRAGMENTED,
80};
81
82enum iwl_mvm_traffic_load {
83 IWL_MVM_TRAFFIC_LOW,
84 IWL_MVM_TRAFFIC_MEDIUM,
85 IWL_MVM_TRAFFIC_HIGH,
86};
87
88struct iwl_mvm_scan_timing_params {
89 u32 dwell_active;
90 u32 dwell_passive;
91 u32 dwell_fragmented;
92 u32 suspend_time;
93 u32 max_out_time;
94};
95
96static struct iwl_mvm_scan_timing_params scan_timing[] = {
97 [IWL_SCAN_TYPE_UNASSOC] = {
98 .dwell_active = 10,
99 .dwell_passive = 110,
100 .dwell_fragmented = 44,
101 .suspend_time = 0,
102 .max_out_time = 0,
103 },
104 [IWL_SCAN_TYPE_WILD] = {
105 .dwell_active = 10,
106 .dwell_passive = 110,
107 .dwell_fragmented = 44,
108 .suspend_time = 30,
109 .max_out_time = 120,
110 },
111 [IWL_SCAN_TYPE_MILD] = {
112 .dwell_active = 10,
113 .dwell_passive = 110,
114 .dwell_fragmented = 44,
115 .suspend_time = 120,
116 .max_out_time = 120,
117 },
118 [IWL_SCAN_TYPE_FRAGMENTED] = {
119 .dwell_active = 10,
120 .dwell_passive = 110,
121 .dwell_fragmented = 44,
122 .suspend_time = 95,
123 .max_out_time = 44,
124 },
125};
126
127struct iwl_mvm_scan_params {
128 enum iwl_mvm_scan_type type;
129 u32 n_channels;
130 u16 delay;
131 int n_ssids;
132 struct cfg80211_ssid *ssids;
133 struct ieee80211_channel **channels;
134 u32 flags;
135 u8 *mac_addr;
136 u8 *mac_addr_mask;
137 bool no_cck;
138 bool pass_all;
139 int n_match_sets;
140 struct iwl_scan_probe_req preq;
141 struct cfg80211_match_set *match_sets;
142 int n_scan_plans;
143 struct cfg80211_sched_scan_plan *scan_plans;
144};
145
146static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
147{
148 if (mvm->scan_rx_ant != ANT_NONE)
149 return mvm->scan_rx_ant;
150 return iwl_mvm_get_valid_rx_ant(mvm);
151}
152
153static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
154{
155 u16 rx_chain;
156 u8 rx_ant;
157
158 rx_ant = iwl_mvm_scan_rx_ant(mvm);
159 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
160 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
161 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
162 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
163 return cpu_to_le16(rx_chain);
164}
165
166static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
167{
168 if (band == IEEE80211_BAND_2GHZ)
169 return cpu_to_le32(PHY_BAND_24);
170 else
171 return cpu_to_le32(PHY_BAND_5);
172}
173
174static inline __le32
175iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
176 bool no_cck)
177{
178 u32 tx_ant;
179
180 mvm->scan_last_antenna_idx =
181 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
182 mvm->scan_last_antenna_idx);
183 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
184
185 if (band == IEEE80211_BAND_2GHZ && !no_cck)
186 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
187 tx_ant);
188 else
189 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
190}
191
192static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
193 struct ieee80211_vif *vif)
194{
195 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
196 int *global_cnt = data;
197
198 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
199 mvmvif->phy_ctxt->id < MAX_PHYS)
200 *global_cnt += 1;
201}
202
203static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
204{
205 return IWL_MVM_TRAFFIC_LOW;
206}
207
208static enum
209iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
210 struct ieee80211_vif *vif,
211 struct iwl_mvm_scan_params *params)
212{
213 int global_cnt = 0;
214 enum iwl_mvm_traffic_load load;
215 bool low_latency;
216
217 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
218 IEEE80211_IFACE_ITER_NORMAL,
219 iwl_mvm_scan_condition_iterator,
220 &global_cnt);
221 if (!global_cnt)
222 return IWL_SCAN_TYPE_UNASSOC;
223
224 load = iwl_mvm_get_traffic_load(mvm);
225 low_latency = iwl_mvm_low_latency(mvm);
226
227 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
228 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
229 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
230 return IWL_SCAN_TYPE_FRAGMENTED;
231
232 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
233 return IWL_SCAN_TYPE_MILD;
234
235 return IWL_SCAN_TYPE_WILD;
236}
237
238static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
239{
240 /* require rrm scan whenever the fw supports it */
241 return fw_has_capa(&mvm->fw->ucode_capa,
242 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
243}
244
245static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
246{
247 int max_probe_len;
248
249 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
250
251 /* we create the 802.11 header and SSID element */
252 max_probe_len -= 24 + 2;
253
254 /* DS parameter set element is added on 2.4GHZ band if required */
255 if (iwl_mvm_rrm_scan_needed(mvm))
256 max_probe_len -= 3;
257
258 return max_probe_len;
259}
260
261int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
262{
263 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
264
265 /* TODO: [BUG] This function should return the maximum allowed size of
266 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
267 * in the same command. So the correct implementation of this function
268 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
269 * command has only 512 bytes and it would leave us with about 240
270 * bytes for scan IEs, which is clearly not enough. So meanwhile
271 * we will report an incorrect value. This may result in a failure to
272 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
273 * functions with -ENOBUFS, if a large enough probe will be provided.
274 */
275 return max_ie_len;
276}
277
278static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
279 int num_res, u8 *buf, size_t buf_size)
280{
281 int i;
282 u8 *pos = buf, *end = buf + buf_size;
283
284 for (i = 0; pos < end && i < num_res; i++)
285 pos += snprintf(pos, end - pos, " %u", res[i].channel);
286
287 /* terminate the string in case the buffer was too short */
288 *(buf + buf_size - 1) = '\0';
289
290 return buf;
291}
292
293void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
294 struct iwl_rx_cmd_buffer *rxb)
295{
296 struct iwl_rx_packet *pkt = rxb_addr(rxb);
297 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
298 u8 buf[256];
299
300 IWL_DEBUG_SCAN(mvm,
301 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
302 notif->status, notif->scanned_channels,
303 iwl_mvm_dump_channel_list(notif->results,
304 notif->scanned_channels, buf,
305 sizeof(buf)));
306}
307
308void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
309 struct iwl_rx_cmd_buffer *rxb)
310{
311 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
312 ieee80211_sched_scan_results(mvm->hw);
313}
314
315static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
316{
317 switch (status) {
318 case IWL_SCAN_EBS_SUCCESS:
319 return "successful";
320 case IWL_SCAN_EBS_INACTIVE:
321 return "inactive";
322 case IWL_SCAN_EBS_FAILED:
323 case IWL_SCAN_EBS_CHAN_NOT_FOUND:
324 default:
325 return "failed";
326 }
327}
328
329void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
330 struct iwl_rx_cmd_buffer *rxb)
331{
332 struct iwl_rx_packet *pkt = rxb_addr(rxb);
333 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
334 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
335
336 /* scan status must be locked for proper checking */
337 lockdep_assert_held(&mvm->mutex);
338
339 /* We first check if we were stopping a scan, in which case we
340 * just clear the stopping flag. Then we check if it was a
341 * firmware initiated stop, in which case we need to inform
342 * mac80211.
343 * Note that we can have a stopping and a running scan
344 * simultaneously, but we can't have two different types of
345 * scans stopping or running at the same time (since LMAC
346 * doesn't support it).
347 */
348
349 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
350 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
351
352 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
353 aborted ? "aborted" : "completed",
354 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
355 IWL_DEBUG_SCAN(mvm,
356 "Last line %d, Last iteration %d, Time after last iteration %d\n",
357 scan_notif->last_schedule_line,
358 scan_notif->last_schedule_iteration,
359 __le32_to_cpu(scan_notif->time_after_last_iter));
360
361 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
362 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
363 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
364 aborted ? "aborted" : "completed",
365 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
366
367 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
368 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
369 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
370
371 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
372 aborted ? "aborted" : "completed",
373 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
374 IWL_DEBUG_SCAN(mvm,
375 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
376 scan_notif->last_schedule_line,
377 scan_notif->last_schedule_iteration,
378 __le32_to_cpu(scan_notif->time_after_last_iter));
379
380 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
381 ieee80211_sched_scan_stopped(mvm->hw);
382 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
383 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
384 aborted ? "aborted" : "completed",
385 iwl_mvm_ebs_status_str(scan_notif->ebs_status));
386
387 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
388 ieee80211_scan_completed(mvm->hw,
389 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
390 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
391 }
392
393 mvm->last_ebs_successful =
394 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
395 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
396}
397
398static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
399{
400 int i;
401
402 for (i = 0; i < PROBE_OPTION_MAX; i++) {
403 if (!ssid_list[i].len)
404 break;
405 if (ssid_list[i].len == ssid_len &&
406 !memcmp(ssid_list->ssid, ssid, ssid_len))
407 return i;
408 }
409 return -1;
410}
411
412/* We insert the SSIDs in an inverted order, because the FW will
413 * invert it back.
414 */
415static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
416 struct iwl_ssid_ie *ssids,
417 u32 *ssid_bitmap)
418{
419 int i, j;
420 int index;
421
422 /*
423 * copy SSIDs from match list.
424 * iwl_config_sched_scan_profiles() uses the order of these ssids to
425 * config match list.
426 */
427 for (i = 0, j = params->n_match_sets - 1;
428 j >= 0 && i < PROBE_OPTION_MAX;
429 i++, j--) {
430 /* skip empty SSID matchsets */
431 if (!params->match_sets[j].ssid.ssid_len)
432 continue;
433 ssids[i].id = WLAN_EID_SSID;
434 ssids[i].len = params->match_sets[j].ssid.ssid_len;
435 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
436 ssids[i].len);
437 }
438
439 /* add SSIDs from scan SSID list */
440 *ssid_bitmap = 0;
441 for (j = params->n_ssids - 1;
442 j >= 0 && i < PROBE_OPTION_MAX;
443 i++, j--) {
444 index = iwl_ssid_exist(params->ssids[j].ssid,
445 params->ssids[j].ssid_len,
446 ssids);
447 if (index < 0) {
448 ssids[i].id = WLAN_EID_SSID;
449 ssids[i].len = params->ssids[j].ssid_len;
450 memcpy(ssids[i].ssid, params->ssids[j].ssid,
451 ssids[i].len);
452 *ssid_bitmap |= BIT(i);
453 } else {
454 *ssid_bitmap |= BIT(index);
455 }
456 }
457}
458
459static int
460iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
461 struct cfg80211_sched_scan_request *req)
462{
463 struct iwl_scan_offload_profile *profile;
464 struct iwl_scan_offload_profile_cfg *profile_cfg;
465 struct iwl_scan_offload_blacklist *blacklist;
466 struct iwl_host_cmd cmd = {
467 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
468 .len[1] = sizeof(*profile_cfg),
469 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
470 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
471 };
472 int blacklist_len;
473 int i;
474 int ret;
475
476 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
477 return -EIO;
478
479 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
480 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
481 else
482 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
483
484 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
485 if (!blacklist)
486 return -ENOMEM;
487
488 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
489 if (!profile_cfg) {
490 ret = -ENOMEM;
491 goto free_blacklist;
492 }
493
494 cmd.data[0] = blacklist;
495 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
496 cmd.data[1] = profile_cfg;
497
498 /* No blacklist configuration */
499
500 profile_cfg->num_profiles = req->n_match_sets;
501 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
502 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
503 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
504 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
505 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
506
507 for (i = 0; i < req->n_match_sets; i++) {
508 profile = &profile_cfg->profiles[i];
509 profile->ssid_index = i;
510 /* Support any cipher and auth algorithm */
511 profile->unicast_cipher = 0xff;
512 profile->auth_alg = 0xff;
513 profile->network_type = IWL_NETWORK_TYPE_ANY;
514 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
515 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
516 }
517
518 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
519
520 ret = iwl_mvm_send_cmd(mvm, &cmd);
521 kfree(profile_cfg);
522free_blacklist:
523 kfree(blacklist);
524
525 return ret;
526}
527
528static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
529 struct cfg80211_sched_scan_request *req)
530{
531 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
532 IWL_DEBUG_SCAN(mvm,
533 "Sending scheduled scan with filtering, n_match_sets %d\n",
534 req->n_match_sets);
535 return false;
536 }
537
538 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
539 return true;
540}
541
542static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
543{
544 int ret;
545 struct iwl_host_cmd cmd = {
546 .id = SCAN_OFFLOAD_ABORT_CMD,
547 };
548 u32 status;
549
550 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
551 if (ret)
552 return ret;
553
554 if (status != CAN_ABORT_STATUS) {
555 /*
556 * The scan abort will return 1 for success or
557 * 2 for "failure". A failure condition can be
558 * due to simply not being in an active scan which
559 * can occur if we send the scan abort before the
560 * microcode has notified us that a scan is completed.
561 */
562 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
563 ret = -ENOENT;
564 }
565
566 return ret;
567}
568
569static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
570 struct iwl_scan_req_tx_cmd *tx_cmd,
571 bool no_cck)
572{
573 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
574 TX_CMD_FLG_BT_DIS);
575 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
576 IEEE80211_BAND_2GHZ,
577 no_cck);
578 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
579
580 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
581 TX_CMD_FLG_BT_DIS);
582 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
583 IEEE80211_BAND_5GHZ,
584 no_cck);
585 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
586}
587
588static void
589iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
590 struct ieee80211_channel **channels,
591 int n_channels, u32 ssid_bitmap,
592 struct iwl_scan_req_lmac *cmd)
593{
594 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
595 int i;
596
597 for (i = 0; i < n_channels; i++) {
598 channel_cfg[i].channel_num =
599 cpu_to_le16(channels[i]->hw_value);
600 channel_cfg[i].iter_count = cpu_to_le16(1);
601 channel_cfg[i].iter_interval = 0;
602 channel_cfg[i].flags =
603 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
604 ssid_bitmap);
605 }
606}
607
608static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
609 size_t len, u8 *const pos)
610{
611 static const u8 before_ds_params[] = {
612 WLAN_EID_SSID,
613 WLAN_EID_SUPP_RATES,
614 WLAN_EID_REQUEST,
615 WLAN_EID_EXT_SUPP_RATES,
616 };
617 size_t offs;
618 u8 *newpos = pos;
619
620 if (!iwl_mvm_rrm_scan_needed(mvm)) {
621 memcpy(newpos, ies, len);
622 return newpos + len;
623 }
624
625 offs = ieee80211_ie_split(ies, len,
626 before_ds_params,
627 ARRAY_SIZE(before_ds_params),
628 0);
629
630 memcpy(newpos, ies, offs);
631 newpos += offs;
632
633 /* Add a placeholder for DS Parameter Set element */
634 *newpos++ = WLAN_EID_DS_PARAMS;
635 *newpos++ = 1;
636 *newpos++ = 0;
637
638 memcpy(newpos, ies + offs, len - offs);
639 newpos += len - offs;
640
641 return newpos;
642}
643
644static void
645iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
646 struct ieee80211_scan_ies *ies,
647 struct iwl_mvm_scan_params *params)
648{
649 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
650 u8 *pos, *newpos;
651 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
652 params->mac_addr : NULL;
653
654 /*
655 * Unfortunately, right now the offload scan doesn't support randomising
656 * within the firmware, so until the firmware API is ready we implement
657 * it in the driver. This means that the scan iterations won't really be
658 * random, only when it's restarted, but at least that helps a bit.
659 */
660 if (mac_addr)
661 get_random_mask_addr(frame->sa, mac_addr,
662 params->mac_addr_mask);
663 else
664 memcpy(frame->sa, vif->addr, ETH_ALEN);
665
666 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
667 eth_broadcast_addr(frame->da);
668 eth_broadcast_addr(frame->bssid);
669 frame->seq_ctrl = 0;
670
671 pos = frame->u.probe_req.variable;
672 *pos++ = WLAN_EID_SSID;
673 *pos++ = 0;
674
675 params->preq.mac_header.offset = 0;
676 params->preq.mac_header.len = cpu_to_le16(24 + 2);
677
678 /* Insert ds parameter set element on 2.4 GHz band */
679 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
680 ies->ies[IEEE80211_BAND_2GHZ],
681 ies->len[IEEE80211_BAND_2GHZ],
682 pos);
683 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
684 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
685 pos = newpos;
686
687 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
688 ies->len[IEEE80211_BAND_5GHZ]);
689 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
690 params->preq.band_data[1].len =
691 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
692 pos += ies->len[IEEE80211_BAND_5GHZ];
693
694 memcpy(pos, ies->common_ies, ies->common_ie_len);
695 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
696 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
697}
698
699static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm,
700 enum iwl_scan_priority_ext prio)
701{
702 if (fw_has_api(&mvm->fw->ucode_capa,
703 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY))
704 return cpu_to_le32(prio);
705
706 if (prio <= IWL_SCAN_PRIORITY_EXT_2)
707 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
708
709 if (prio <= IWL_SCAN_PRIORITY_EXT_4)
710 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
711
712 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
713}
714
715static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
716 struct iwl_scan_req_lmac *cmd,
717 struct iwl_mvm_scan_params *params)
718{
719 cmd->active_dwell = scan_timing[params->type].dwell_active;
720 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
721 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
722 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
723 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
724 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
725}
726
727static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
728 struct ieee80211_scan_ies *ies,
729 int n_channels)
730{
731 return ((n_ssids <= PROBE_OPTION_MAX) &&
732 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
733 (ies->common_ie_len +
734 ies->len[NL80211_BAND_2GHZ] +
735 ies->len[NL80211_BAND_5GHZ] <=
736 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
737}
738
739static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
740 struct ieee80211_vif *vif)
741{
742 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
743
744 /* We can only use EBS if:
745 * 1. the feature is supported;
746 * 2. the last EBS was successful;
747 * 3. if only single scan, the single scan EBS API is supported;
748 * 4. it's not a p2p find operation.
749 */
750 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
751 mvm->last_ebs_successful &&
752 vif->type != NL80211_IFTYPE_P2P_DEVICE);
753}
754
755static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
756 struct iwl_mvm_scan_params *params)
757{
758 int flags = 0;
759
760 if (params->n_ssids == 0)
761 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
762
763 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
764 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
765
766 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
767 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
768
769 if (iwl_mvm_rrm_scan_needed(mvm))
770 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
771
772 if (params->pass_all)
773 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
774 else
775 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
776
777#ifdef CONFIG_IWLWIFI_DEBUGFS
778 if (mvm->scan_iter_notif_enabled)
779 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
780#endif
781
782 return flags;
783}
784
785static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
786 struct iwl_mvm_scan_params *params)
787{
788 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
789 struct iwl_scan_probe_req *preq =
790 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
791 mvm->fw->ucode_capa.n_scan_channels);
792 u32 ssid_bitmap = 0;
793 int i;
794
795 lockdep_assert_held(&mvm->mutex);
796
797 memset(cmd, 0, ksize(cmd));
798
799 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
800 return -EINVAL;
801
802 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
803
804 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
805 cmd->iter_num = cpu_to_le32(1);
806 cmd->n_channels = (u8)params->n_channels;
807
808 cmd->delay = cpu_to_le32(params->delay);
809
810 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params));
811
812 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
813 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
814 MAC_FILTER_IN_BEACON);
815 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
816 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
817
818 /* this API uses bits 1-20 instead of 0-19 */
819 ssid_bitmap <<= 1;
820
821 for (i = 0; i < params->n_scan_plans; i++) {
822 struct cfg80211_sched_scan_plan *scan_plan =
823 &params->scan_plans[i];
824
825 cmd->schedule[i].delay =
826 cpu_to_le16(scan_plan->interval);
827 cmd->schedule[i].iterations = scan_plan->iterations;
828 cmd->schedule[i].full_scan_mul = 1;
829 }
830
831 /*
832 * If the number of iterations of the last scan plan is set to
833 * zero, it should run infinitely. However, this is not always the case.
834 * For example, when regular scan is requested the driver sets one scan
835 * plan with one iteration.
836 */
837 if (!cmd->schedule[i - 1].iterations)
838 cmd->schedule[i - 1].iterations = 0xff;
839
840 if (iwl_mvm_scan_use_ebs(mvm, vif)) {
841 cmd->channel_opt[0].flags =
842 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
843 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
844 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
845 cmd->channel_opt[0].non_ebs_ratio =
846 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
847 cmd->channel_opt[1].flags =
848 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
849 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
850 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
851 cmd->channel_opt[1].non_ebs_ratio =
852 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
853 }
854
855 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
856 params->n_channels, ssid_bitmap, cmd);
857
858 *preq = params->preq;
859
860 return 0;
861}
862
863static int rate_to_scan_rate_flag(unsigned int rate)
864{
865 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
866 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
867 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
868 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
869 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
870 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
871 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
872 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
873 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
874 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
875 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
876 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
877 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
878 };
879
880 return rate_to_scan_rate[rate];
881}
882
883static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
884{
885 struct ieee80211_supported_band *band;
886 unsigned int rates = 0;
887 int i;
888
889 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
890 for (i = 0; i < band->n_bitrates; i++)
891 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
892 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
893 for (i = 0; i < band->n_bitrates; i++)
894 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
895
896 /* Set both basic rates and supported rates */
897 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
898
899 return cpu_to_le32(rates);
900}
901
902int iwl_mvm_config_scan(struct iwl_mvm *mvm)
903{
904 struct iwl_scan_config *scan_config;
905 struct ieee80211_supported_band *band;
906 int num_channels =
907 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
908 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
909 int ret, i, j = 0, cmd_size;
910 struct iwl_host_cmd cmd = {
911 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
912 };
913
914 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
915 return -ENOBUFS;
916
917 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
918
919 scan_config = kzalloc(cmd_size, GFP_KERNEL);
920 if (!scan_config)
921 return -ENOMEM;
922
923 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
924 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
925 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
926 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
927 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
928 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
929 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
930 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
931 SCAN_CONFIG_N_CHANNELS(num_channels));
932 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
933 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
934 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
935 scan_config->out_of_channel_time = cpu_to_le32(170);
936 scan_config->suspend_time = cpu_to_le32(30);
937 scan_config->dwell_active = 20;
938 scan_config->dwell_passive = 110;
939 scan_config->dwell_fragmented = 20;
940
941 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
942
943 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
944 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
945 IWL_CHANNEL_FLAG_ACCURATE_EBS |
946 IWL_CHANNEL_FLAG_EBS_ADD |
947 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
948
949 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
950 for (i = 0; i < band->n_channels; i++, j++)
951 scan_config->channel_array[j] = band->channels[i].hw_value;
952 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
953 for (i = 0; i < band->n_channels; i++, j++)
954 scan_config->channel_array[j] = band->channels[i].hw_value;
955
956 cmd.data[0] = scan_config;
957 cmd.len[0] = cmd_size;
958 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
959
960 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
961
962 ret = iwl_mvm_send_cmd(mvm, &cmd);
963
964 kfree(scan_config);
965 return ret;
966}
967
968static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
969{
970 int i;
971
972 for (i = 0; i < mvm->max_scans; i++)
973 if (mvm->scan_uid_status[i] == status)
974 return i;
975
976 return -ENOENT;
977}
978
979static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
980{
981 return params->n_scan_plans == 1 &&
982 params->scan_plans[0].iterations == 1;
983}
984
985static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
986 struct iwl_scan_req_umac *cmd,
987 struct iwl_mvm_scan_params *params)
988{
989 cmd->active_dwell = scan_timing[params->type].dwell_active;
990 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
991 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
992 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
993 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
994 cmd->scan_priority =
995 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
996
997 if (iwl_mvm_is_regular_scan(params))
998 cmd->ooc_priority =
999 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1000 else
1001 cmd->ooc_priority =
1002 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
1003}
1004
1005static void
1006iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1007 struct ieee80211_channel **channels,
1008 int n_channels, u32 ssid_bitmap,
1009 struct iwl_scan_req_umac *cmd)
1010{
1011 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1012 int i;
1013
1014 for (i = 0; i < n_channels; i++) {
1015 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1016 channel_cfg[i].channel_num = channels[i]->hw_value;
1017 channel_cfg[i].iter_count = 1;
1018 channel_cfg[i].iter_interval = 0;
1019 }
1020}
1021
1022static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1023 struct iwl_mvm_scan_params *params)
1024{
1025 int flags = 0;
1026
1027 if (params->n_ssids == 0)
1028 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1029
1030 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1031 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1032
1033 if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1034 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1035
1036 if (iwl_mvm_rrm_scan_needed(mvm))
1037 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1038
1039 if (params->pass_all)
1040 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1041 else
1042 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1043
1044 if (!iwl_mvm_is_regular_scan(params))
1045 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1046
1047#ifdef CONFIG_IWLWIFI_DEBUGFS
1048 if (mvm->scan_iter_notif_enabled)
1049 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1050#endif
1051 return flags;
1052}
1053
1054static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1055 struct iwl_mvm_scan_params *params,
1056 int type)
1057{
1058 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1059 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1060 sizeof(struct iwl_scan_channel_cfg_umac) *
1061 mvm->fw->ucode_capa.n_scan_channels;
1062 int uid, i;
1063 u32 ssid_bitmap = 0;
1064
1065 lockdep_assert_held(&mvm->mutex);
1066
1067 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1068 return -EINVAL;
1069
1070 uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1071 if (uid < 0)
1072 return uid;
1073
1074 memset(cmd, 0, ksize(cmd));
1075
1076 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1077
1078 mvm->scan_uid_status[uid] = type;
1079
1080 cmd->uid = cpu_to_le32(uid);
1081 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params));
1082
1083 if (type == IWL_MVM_SCAN_SCHED)
1084 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1085
1086 if (iwl_mvm_scan_use_ebs(mvm, vif))
1087 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1088 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1089 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1090
1091 cmd->n_channels = params->n_channels;
1092
1093 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1094
1095 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1096 params->n_channels, ssid_bitmap, cmd);
1097
1098 for (i = 0; i < params->n_scan_plans; i++) {
1099 struct cfg80211_sched_scan_plan *scan_plan =
1100 &params->scan_plans[i];
1101
1102 sec_part->schedule[i].iter_count = scan_plan->iterations;
1103 sec_part->schedule[i].interval =
1104 cpu_to_le16(scan_plan->interval);
1105 }
1106
1107 /*
1108 * If the number of iterations of the last scan plan is set to
1109 * zero, it should run infinitely. However, this is not always the case.
1110 * For example, when regular scan is requested the driver sets one scan
1111 * plan with one iteration.
1112 */
1113 if (!sec_part->schedule[i - 1].iter_count)
1114 sec_part->schedule[i - 1].iter_count = 0xff;
1115
1116 sec_part->delay = cpu_to_le16(params->delay);
1117 sec_part->preq = params->preq;
1118
1119 return 0;
1120}
1121
1122static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1123{
1124 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1125}
1126
1127static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1128{
1129 /* This looks a bit arbitrary, but the idea is that if we run
1130 * out of possible simultaneous scans and the userspace is
1131 * trying to run a scan type that is already running, we
1132 * return -EBUSY. But if the userspace wants to start a
1133 * different type of scan, we stop the opposite type to make
1134 * space for the new request. The reason is backwards
1135 * compatibility with old wpa_supplicant that wouldn't stop a
1136 * scheduled scan before starting a normal scan.
1137 */
1138
1139 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1140 return 0;
1141
1142 /* Use a switch, even though this is a bitmask, so that more
1143 * than one bits set will fall in default and we will warn.
1144 */
1145 switch (type) {
1146 case IWL_MVM_SCAN_REGULAR:
1147 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1148 return -EBUSY;
1149 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1150 case IWL_MVM_SCAN_SCHED:
1151 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1152 return -EBUSY;
1153 iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1154 case IWL_MVM_SCAN_NETDETECT:
1155 /* No need to stop anything for net-detect since the
1156 * firmware is restarted anyway. This way, any sched
1157 * scans that were running will be restarted when we
1158 * resume.
1159 */
1160 return 0;
1161 default:
1162 WARN_ON(1);
1163 break;
1164 }
1165
1166 return -EIO;
1167}
1168
1169int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1170 struct cfg80211_scan_request *req,
1171 struct ieee80211_scan_ies *ies)
1172{
1173 struct iwl_host_cmd hcmd = {
1174 .len = { iwl_mvm_scan_size(mvm), },
1175 .data = { mvm->scan_cmd, },
1176 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1177 };
1178 struct iwl_mvm_scan_params params = {};
1179 int ret;
1180 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1181
1182 lockdep_assert_held(&mvm->mutex);
1183
1184 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1185 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1186 return -EBUSY;
1187 }
1188
1189 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1190 if (ret)
1191 return ret;
1192
1193 /* we should have failed registration if scan_cmd was NULL */
1194 if (WARN_ON(!mvm->scan_cmd))
1195 return -ENOMEM;
1196
1197 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1198 return -ENOBUFS;
1199
1200 params.n_ssids = req->n_ssids;
1201 params.flags = req->flags;
1202 params.n_channels = req->n_channels;
1203 params.delay = 0;
1204 params.ssids = req->ssids;
1205 params.channels = req->channels;
1206 params.mac_addr = req->mac_addr;
1207 params.mac_addr_mask = req->mac_addr_mask;
1208 params.no_cck = req->no_cck;
1209 params.pass_all = true;
1210 params.n_match_sets = 0;
1211 params.match_sets = NULL;
1212
1213 params.scan_plans = &scan_plan;
1214 params.n_scan_plans = 1;
1215
1216 params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
1217
1218 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1219
1220 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1221 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1222 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1223 IWL_MVM_SCAN_REGULAR);
1224 } else {
1225 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1226 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1227 }
1228
1229 if (ret)
1230 return ret;
1231
1232 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1233 if (ret) {
1234 /* If the scan failed, it usually means that the FW was unable
1235 * to allocate the time events. Warn on it, but maybe we
1236 * should try to send the command again with different params.
1237 */
1238 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1239 return ret;
1240 }
1241
1242 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1243 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1244 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1245
1246 return 0;
1247}
1248
1249int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1250 struct ieee80211_vif *vif,
1251 struct cfg80211_sched_scan_request *req,
1252 struct ieee80211_scan_ies *ies,
1253 int type)
1254{
1255 struct iwl_host_cmd hcmd = {
1256 .len = { iwl_mvm_scan_size(mvm), },
1257 .data = { mvm->scan_cmd, },
1258 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1259 };
1260 struct iwl_mvm_scan_params params = {};
1261 int ret;
1262
1263 lockdep_assert_held(&mvm->mutex);
1264
1265 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1266 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1267 return -EBUSY;
1268 }
1269
1270 ret = iwl_mvm_check_running_scans(mvm, type);
1271 if (ret)
1272 return ret;
1273
1274 /* we should have failed registration if scan_cmd was NULL */
1275 if (WARN_ON(!mvm->scan_cmd))
1276 return -ENOMEM;
1277
1278 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1279 return -ENOBUFS;
1280
1281 params.n_ssids = req->n_ssids;
1282 params.flags = req->flags;
1283 params.n_channels = req->n_channels;
1284 params.ssids = req->ssids;
1285 params.channels = req->channels;
1286 params.mac_addr = req->mac_addr;
1287 params.mac_addr_mask = req->mac_addr_mask;
1288 params.no_cck = false;
1289 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1290 params.n_match_sets = req->n_match_sets;
1291 params.match_sets = req->match_sets;
1292 if (!req->n_scan_plans)
1293 return -EINVAL;
1294
1295 params.n_scan_plans = req->n_scan_plans;
1296 params.scan_plans = req->scan_plans;
1297
1298 params.type = iwl_mvm_get_scan_type(mvm, vif, &params);
1299
1300 /* In theory, LMAC scans can handle a 32-bit delay, but since
1301 * waiting for over 18 hours to start the scan is a bit silly
1302 * and to keep it aligned with UMAC scans (which only support
1303 * 16-bit delays), trim it down to 16-bits.
1304 */
1305 if (req->delay > U16_MAX) {
1306 IWL_DEBUG_SCAN(mvm,
1307 "delay value is > 16-bits, set to max possible\n");
1308 params.delay = U16_MAX;
1309 } else {
1310 params.delay = req->delay;
1311 }
1312
1313 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1314 if (ret)
1315 return ret;
1316
1317 iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1318
1319 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1320 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1321 ret = iwl_mvm_scan_umac(mvm, vif, &params, IWL_MVM_SCAN_SCHED);
1322 } else {
1323 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1324 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1325 }
1326
1327 if (ret)
1328 return ret;
1329
1330 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1331 if (!ret) {
1332 IWL_DEBUG_SCAN(mvm,
1333 "Sched scan request was sent successfully\n");
1334 mvm->scan_status |= type;
1335 } else {
1336 /* If the scan failed, it usually means that the FW was unable
1337 * to allocate the time events. Warn on it, but maybe we
1338 * should try to send the command again with different params.
1339 */
1340 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1341 }
1342
1343 return ret;
1344}
1345
1346void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1347 struct iwl_rx_cmd_buffer *rxb)
1348{
1349 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1350 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1351 u32 uid = __le32_to_cpu(notif->uid);
1352 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1353
1354 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1355 return;
1356
1357 /* if the scan is already stopping, we don't need to notify mac80211 */
1358 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1359 ieee80211_scan_completed(mvm->hw, aborted);
1360 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1361 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1362 ieee80211_sched_scan_stopped(mvm->hw);
1363 }
1364
1365 mvm->scan_status &= ~mvm->scan_uid_status[uid];
1366 IWL_DEBUG_SCAN(mvm,
1367 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1368 uid, mvm->scan_uid_status[uid],
1369 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1370 "completed" : "aborted",
1371 iwl_mvm_ebs_status_str(notif->ebs_status));
1372 IWL_DEBUG_SCAN(mvm,
1373 "Last line %d, Last iteration %d, Time from last iteration %d\n",
1374 notif->last_schedule, notif->last_iter,
1375 __le32_to_cpu(notif->time_from_last_iter));
1376
1377 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1378 notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1379 mvm->last_ebs_successful = false;
1380
1381 mvm->scan_uid_status[uid] = 0;
1382}
1383
1384void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1385 struct iwl_rx_cmd_buffer *rxb)
1386{
1387 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1388 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1389 u8 buf[256];
1390
1391 IWL_DEBUG_SCAN(mvm,
1392 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1393 notif->status, notif->scanned_channels,
1394 iwl_mvm_dump_channel_list(notif->results,
1395 notif->scanned_channels, buf,
1396 sizeof(buf)));
1397}
1398
1399static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1400{
1401 struct iwl_umac_scan_abort cmd = {};
1402 int uid, ret;
1403
1404 lockdep_assert_held(&mvm->mutex);
1405
1406 /* We should always get a valid index here, because we already
1407 * checked that this type of scan was running in the generic
1408 * code.
1409 */
1410 uid = iwl_mvm_scan_uid_by_status(mvm, type);
1411 if (WARN_ON_ONCE(uid < 0))
1412 return uid;
1413
1414 cmd.uid = cpu_to_le32(uid);
1415
1416 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1417
1418 ret = iwl_mvm_send_cmd_pdu(mvm,
1419 iwl_cmd_id(SCAN_ABORT_UMAC,
1420 IWL_ALWAYS_LONG_GROUP, 0),
1421 0, sizeof(cmd), &cmd);
1422 if (!ret)
1423 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1424
1425 return ret;
1426}
1427
1428static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1429{
1430 struct iwl_notification_wait wait_scan_done;
1431 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1432 SCAN_OFFLOAD_COMPLETE, };
1433 int ret;
1434
1435 lockdep_assert_held(&mvm->mutex);
1436
1437 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1438 scan_done_notif,
1439 ARRAY_SIZE(scan_done_notif),
1440 NULL, NULL);
1441
1442 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1443
1444 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1445 ret = iwl_mvm_umac_scan_abort(mvm, type);
1446 else
1447 ret = iwl_mvm_lmac_scan_abort(mvm);
1448
1449 if (ret) {
1450 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1451 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1452 return ret;
1453 }
1454
1455 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1456
1457 return ret;
1458}
1459
1460int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1461{
1462 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1463 return sizeof(struct iwl_scan_req_umac) +
1464 sizeof(struct iwl_scan_channel_cfg_umac) *
1465 mvm->fw->ucode_capa.n_scan_channels +
1466 sizeof(struct iwl_scan_req_umac_tail);
1467
1468 return sizeof(struct iwl_scan_req_lmac) +
1469 sizeof(struct iwl_scan_channel_cfg_lmac) *
1470 mvm->fw->ucode_capa.n_scan_channels +
1471 sizeof(struct iwl_scan_probe_req);
1472}
1473
1474/*
1475 * This function is used in nic restart flow, to inform mac80211 about scans
1476 * that was aborted by restart flow or by an assert.
1477 */
1478void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1479{
1480 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1481 int uid, i;
1482
1483 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1484 if (uid >= 0) {
1485 ieee80211_scan_completed(mvm->hw, true);
1486 mvm->scan_uid_status[uid] = 0;
1487 }
1488 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1489 if (uid >= 0 && !mvm->restart_fw) {
1490 ieee80211_sched_scan_stopped(mvm->hw);
1491 mvm->scan_uid_status[uid] = 0;
1492 }
1493
1494 /* We shouldn't have any UIDs still set. Loop over all the
1495 * UIDs to make sure there's nothing left there and warn if
1496 * any is found.
1497 */
1498 for (i = 0; i < mvm->max_scans; i++) {
1499 if (WARN_ONCE(mvm->scan_uid_status[i],
1500 "UMAC scan UID %d status was not cleaned\n",
1501 i))
1502 mvm->scan_uid_status[i] = 0;
1503 }
1504 } else {
1505 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1506 ieee80211_scan_completed(mvm->hw, true);
1507
1508 /* Sched scan will be restarted by mac80211 in
1509 * restart_hw, so do not report if FW is about to be
1510 * restarted.
1511 */
1512 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1513 ieee80211_sched_scan_stopped(mvm->hw);
1514 }
1515}
1516
1517int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1518{
1519 int ret;
1520
1521 if (!(mvm->scan_status & type))
1522 return 0;
1523
1524 if (iwl_mvm_is_radio_killed(mvm)) {
1525 ret = 0;
1526 goto out;
1527 }
1528
1529 ret = iwl_mvm_scan_stop_wait(mvm, type);
1530 if (!ret)
1531 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1532out:
1533 /* Clear the scan status so the next scan requests will
1534 * succeed and mark the scan as stopping, so that the Rx
1535 * handler doesn't do anything, as the scan was stopped from
1536 * above.
1537 */
1538 mvm->scan_status &= ~type;
1539
1540 if (type == IWL_MVM_SCAN_REGULAR) {
1541 /* Since the rx handler won't do anything now, we have
1542 * to release the scan reference here.
1543 */
1544 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1545 if (notify)
1546 ieee80211_scan_completed(mvm->hw, true);
1547 } else if (notify) {
1548 ieee80211_sched_scan_stopped(mvm->hw);
1549 }
1550
1551 return ret;
1552}
generated by cgit v1.2.2 (git 2.25.0) at 2025-05-31 06:43:37 -0400