1 /******************************************************************************
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.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
10 * Copyright(c) 2016 Intel Deutschland GmbH
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of version 2 of the GNU General Public License as
14 * published by the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 * General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
26 * The full GNU General Public License is included in this distribution
27 * in the file called COPYING.
29 * Contact Information:
30 * Intel Linux Wireless <linuxwifi@intel.com>
31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
37 * Copyright(c) 2016 Intel Deutschland GmbH
38 * All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
44 * * Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * * Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in
48 * the documentation and/or other materials provided with the
50 * * Neither the name Intel Corporation nor the names of its
51 * contributors may be used to endorse or promote products derived
52 * from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
66 *****************************************************************************/
68 #include <linux/etherdevice.h>
69 #include <net/mac80211.h>
72 #include "fw-api-scan.h"
75 #define IWL_DENSE_EBS_SCAN_RATIO 5
76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
78 enum iwl_mvm_traffic_load
{
80 IWL_MVM_TRAFFIC_MEDIUM
,
84 struct iwl_mvm_scan_timing_params
{
93 static struct iwl_mvm_scan_timing_params scan_timing
[] = {
94 [IWL_SCAN_TYPE_UNASSOC
] = {
97 .dwell_fragmented
= 44,
102 [IWL_SCAN_TYPE_WILD
] = {
104 .dwell_passive
= 110,
105 .dwell_fragmented
= 44,
106 .dwell_extended
= 90,
110 [IWL_SCAN_TYPE_MILD
] = {
112 .dwell_passive
= 110,
113 .dwell_fragmented
= 44,
114 .dwell_extended
= 90,
118 [IWL_SCAN_TYPE_FRAGMENTED
] = {
120 .dwell_passive
= 110,
121 .dwell_fragmented
= 44,
127 struct iwl_mvm_scan_params
{
128 enum iwl_mvm_scan_type type
;
132 struct cfg80211_ssid
*ssids
;
133 struct ieee80211_channel
**channels
;
140 struct iwl_scan_probe_req preq
;
141 struct cfg80211_match_set
*match_sets
;
143 struct cfg80211_sched_scan_plan
*scan_plans
;
144 u32 measurement_dwell
;
147 static u8
iwl_mvm_scan_rx_ant(struct iwl_mvm
*mvm
)
149 if (mvm
->scan_rx_ant
!= ANT_NONE
)
150 return mvm
->scan_rx_ant
;
151 return iwl_mvm_get_valid_rx_ant(mvm
);
154 static inline __le16
iwl_mvm_scan_rx_chain(struct iwl_mvm
*mvm
)
159 rx_ant
= iwl_mvm_scan_rx_ant(mvm
);
160 rx_chain
= rx_ant
<< PHY_RX_CHAIN_VALID_POS
;
161 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_MIMO_SEL_POS
;
162 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_SEL_POS
;
163 rx_chain
|= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS
;
164 return cpu_to_le16(rx_chain
);
167 static __le32
iwl_mvm_scan_rxon_flags(enum nl80211_band band
)
169 if (band
== NL80211_BAND_2GHZ
)
170 return cpu_to_le32(PHY_BAND_24
);
172 return cpu_to_le32(PHY_BAND_5
);
176 iwl_mvm_scan_rate_n_flags(struct iwl_mvm
*mvm
, enum nl80211_band band
,
181 mvm
->scan_last_antenna_idx
=
182 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
183 mvm
->scan_last_antenna_idx
);
184 tx_ant
= BIT(mvm
->scan_last_antenna_idx
) << RATE_MCS_ANT_POS
;
186 if (band
== NL80211_BAND_2GHZ
&& !no_cck
)
187 return cpu_to_le32(IWL_RATE_1M_PLCP
| RATE_MCS_CCK_MSK
|
190 return cpu_to_le32(IWL_RATE_6M_PLCP
| tx_ant
);
193 static void iwl_mvm_scan_condition_iterator(void *data
, u8
*mac
,
194 struct ieee80211_vif
*vif
)
196 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
197 int *global_cnt
= data
;
199 if (vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&& mvmvif
->phy_ctxt
&&
200 mvmvif
->phy_ctxt
->id
< MAX_PHYS
)
204 static enum iwl_mvm_traffic_load
iwl_mvm_get_traffic_load(struct iwl_mvm
*mvm
)
206 return IWL_MVM_TRAFFIC_LOW
;
210 iwl_mvm_scan_type
iwl_mvm_get_scan_type(struct iwl_mvm
*mvm
, bool p2p_device
)
213 enum iwl_mvm_traffic_load load
;
216 ieee80211_iterate_active_interfaces_atomic(mvm
->hw
,
217 IEEE80211_IFACE_ITER_NORMAL
,
218 iwl_mvm_scan_condition_iterator
,
221 return IWL_SCAN_TYPE_UNASSOC
;
223 load
= iwl_mvm_get_traffic_load(mvm
);
224 low_latency
= iwl_mvm_low_latency(mvm
);
226 if ((load
== IWL_MVM_TRAFFIC_HIGH
|| low_latency
) && !p2p_device
&&
227 fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_FRAGMENTED_SCAN
))
228 return IWL_SCAN_TYPE_FRAGMENTED
;
230 if (load
>= IWL_MVM_TRAFFIC_MEDIUM
|| low_latency
)
231 return IWL_SCAN_TYPE_MILD
;
233 return IWL_SCAN_TYPE_WILD
;
237 iwl_mvm_get_measurement_dwell(struct iwl_mvm
*mvm
,
238 struct cfg80211_scan_request
*req
,
239 struct iwl_mvm_scan_params
*params
)
244 if (req
->duration_mandatory
&&
245 req
->duration
> scan_timing
[params
->type
].max_out_time
) {
247 "Measurement scan - too long dwell %hu (max out time %u)\n",
249 scan_timing
[params
->type
].max_out_time
);
253 return min_t(u32
, (u32
)req
->duration
,
254 scan_timing
[params
->type
].max_out_time
);
257 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm
*mvm
)
259 /* require rrm scan whenever the fw supports it */
260 return fw_has_capa(&mvm
->fw
->ucode_capa
,
261 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT
);
264 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm
*mvm
)
268 max_probe_len
= SCAN_OFFLOAD_PROBE_REQ_SIZE
;
270 /* we create the 802.11 header and SSID element */
271 max_probe_len
-= 24 + 2;
273 /* DS parameter set element is added on 2.4GHZ band if required */
274 if (iwl_mvm_rrm_scan_needed(mvm
))
277 return max_probe_len
;
280 int iwl_mvm_max_scan_ie_len(struct iwl_mvm
*mvm
)
282 int max_ie_len
= iwl_mvm_max_scan_ie_fw_cmd_room(mvm
);
284 /* TODO: [BUG] This function should return the maximum allowed size of
285 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
286 * in the same command. So the correct implementation of this function
287 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
288 * command has only 512 bytes and it would leave us with about 240
289 * bytes for scan IEs, which is clearly not enough. So meanwhile
290 * we will report an incorrect value. This may result in a failure to
291 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
292 * functions with -ENOBUFS, if a large enough probe will be provided.
297 static u8
*iwl_mvm_dump_channel_list(struct iwl_scan_results_notif
*res
,
298 int num_res
, u8
*buf
, size_t buf_size
)
301 u8
*pos
= buf
, *end
= buf
+ buf_size
;
303 for (i
= 0; pos
< end
&& i
< num_res
; i
++)
304 pos
+= snprintf(pos
, end
- pos
, " %u", res
[i
].channel
);
306 /* terminate the string in case the buffer was too short */
307 *(buf
+ buf_size
- 1) = '\0';
312 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm
*mvm
,
313 struct iwl_rx_cmd_buffer
*rxb
)
315 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
316 struct iwl_lmac_scan_complete_notif
*notif
= (void *)pkt
->data
;
320 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
321 notif
->status
, notif
->scanned_channels
,
322 iwl_mvm_dump_channel_list(notif
->results
,
323 notif
->scanned_channels
, buf
,
326 if (mvm
->sched_scan_pass_all
== SCHED_SCAN_PASS_ALL_FOUND
) {
327 IWL_DEBUG_SCAN(mvm
, "Pass all scheduled scan results found\n");
328 ieee80211_sched_scan_results(mvm
->hw
);
329 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_ENABLED
;
333 void iwl_mvm_rx_scan_match_found(struct iwl_mvm
*mvm
,
334 struct iwl_rx_cmd_buffer
*rxb
)
336 IWL_DEBUG_SCAN(mvm
, "Scheduled scan results\n");
337 ieee80211_sched_scan_results(mvm
->hw
);
340 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status
)
343 case IWL_SCAN_EBS_SUCCESS
:
345 case IWL_SCAN_EBS_INACTIVE
:
347 case IWL_SCAN_EBS_FAILED
:
348 case IWL_SCAN_EBS_CHAN_NOT_FOUND
:
354 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm
*mvm
,
355 struct iwl_rx_cmd_buffer
*rxb
)
357 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
358 struct iwl_periodic_scan_complete
*scan_notif
= (void *)pkt
->data
;
359 bool aborted
= (scan_notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
361 /* If this happens, the firmware has mistakenly sent an LMAC
362 * notification during UMAC scans -- warn and ignore it.
364 if (WARN_ON_ONCE(fw_has_capa(&mvm
->fw
->ucode_capa
,
365 IWL_UCODE_TLV_CAPA_UMAC_SCAN
)))
368 /* scan status must be locked for proper checking */
369 lockdep_assert_held(&mvm
->mutex
);
371 /* We first check if we were stopping a scan, in which case we
372 * just clear the stopping flag. Then we check if it was a
373 * firmware initiated stop, in which case we need to inform
375 * Note that we can have a stopping and a running scan
376 * simultaneously, but we can't have two different types of
377 * scans stopping or running at the same time (since LMAC
378 * doesn't support it).
381 if (mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_SCHED
) {
382 WARN_ON_ONCE(mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_REGULAR
);
384 IWL_DEBUG_SCAN(mvm
, "Scheduled scan %s, EBS status %s\n",
385 aborted
? "aborted" : "completed",
386 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
388 "Last line %d, Last iteration %d, Time after last iteration %d\n",
389 scan_notif
->last_schedule_line
,
390 scan_notif
->last_schedule_iteration
,
391 __le32_to_cpu(scan_notif
->time_after_last_iter
));
393 mvm
->scan_status
&= ~IWL_MVM_SCAN_STOPPING_SCHED
;
394 } else if (mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_REGULAR
) {
395 IWL_DEBUG_SCAN(mvm
, "Regular scan %s, EBS status %s\n",
396 aborted
? "aborted" : "completed",
397 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
399 mvm
->scan_status
&= ~IWL_MVM_SCAN_STOPPING_REGULAR
;
400 } else if (mvm
->scan_status
& IWL_MVM_SCAN_SCHED
) {
401 WARN_ON_ONCE(mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
);
403 IWL_DEBUG_SCAN(mvm
, "Scheduled scan %s, EBS status %s\n",
404 aborted
? "aborted" : "completed",
405 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
407 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
408 scan_notif
->last_schedule_line
,
409 scan_notif
->last_schedule_iteration
,
410 __le32_to_cpu(scan_notif
->time_after_last_iter
));
412 mvm
->scan_status
&= ~IWL_MVM_SCAN_SCHED
;
413 ieee80211_sched_scan_stopped(mvm
->hw
);
414 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_DISABLED
;
415 } else if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
) {
416 struct cfg80211_scan_info info
= {
420 IWL_DEBUG_SCAN(mvm
, "Regular scan %s, EBS status %s (FW)\n",
421 aborted
? "aborted" : "completed",
422 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
424 mvm
->scan_status
&= ~IWL_MVM_SCAN_REGULAR
;
425 ieee80211_scan_completed(mvm
->hw
, &info
);
426 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
427 cancel_delayed_work(&mvm
->scan_timeout_dwork
);
430 "got scan complete notification but no scan is running\n");
433 mvm
->last_ebs_successful
=
434 scan_notif
->ebs_status
== IWL_SCAN_EBS_SUCCESS
||
435 scan_notif
->ebs_status
== IWL_SCAN_EBS_INACTIVE
;
438 static int iwl_ssid_exist(u8
*ssid
, u8 ssid_len
, struct iwl_ssid_ie
*ssid_list
)
442 for (i
= 0; i
< PROBE_OPTION_MAX
; i
++) {
443 if (!ssid_list
[i
].len
)
445 if (ssid_list
[i
].len
== ssid_len
&&
446 !memcmp(ssid_list
->ssid
, ssid
, ssid_len
))
452 /* We insert the SSIDs in an inverted order, because the FW will
455 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params
*params
,
456 struct iwl_ssid_ie
*ssids
,
463 * copy SSIDs from match list.
464 * iwl_config_sched_scan_profiles() uses the order of these ssids to
467 for (i
= 0, j
= params
->n_match_sets
- 1;
468 j
>= 0 && i
< PROBE_OPTION_MAX
;
470 /* skip empty SSID matchsets */
471 if (!params
->match_sets
[j
].ssid
.ssid_len
)
473 ssids
[i
].id
= WLAN_EID_SSID
;
474 ssids
[i
].len
= params
->match_sets
[j
].ssid
.ssid_len
;
475 memcpy(ssids
[i
].ssid
, params
->match_sets
[j
].ssid
.ssid
,
479 /* add SSIDs from scan SSID list */
481 for (j
= params
->n_ssids
- 1;
482 j
>= 0 && i
< PROBE_OPTION_MAX
;
484 index
= iwl_ssid_exist(params
->ssids
[j
].ssid
,
485 params
->ssids
[j
].ssid_len
,
488 ssids
[i
].id
= WLAN_EID_SSID
;
489 ssids
[i
].len
= params
->ssids
[j
].ssid_len
;
490 memcpy(ssids
[i
].ssid
, params
->ssids
[j
].ssid
,
492 *ssid_bitmap
|= BIT(i
);
494 *ssid_bitmap
|= BIT(index
);
500 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm
*mvm
,
501 struct cfg80211_sched_scan_request
*req
)
503 struct iwl_scan_offload_profile
*profile
;
504 struct iwl_scan_offload_profile_cfg
*profile_cfg
;
505 struct iwl_scan_offload_blacklist
*blacklist
;
506 struct iwl_host_cmd cmd
= {
507 .id
= SCAN_OFFLOAD_UPDATE_PROFILES_CMD
,
508 .len
[1] = sizeof(*profile_cfg
),
509 .dataflags
[0] = IWL_HCMD_DFL_NOCOPY
,
510 .dataflags
[1] = IWL_HCMD_DFL_NOCOPY
,
516 if (WARN_ON(req
->n_match_sets
> IWL_SCAN_MAX_PROFILES
))
519 if (mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_SHORT_BL
)
520 blacklist_len
= IWL_SCAN_SHORT_BLACKLIST_LEN
;
522 blacklist_len
= IWL_SCAN_MAX_BLACKLIST_LEN
;
524 blacklist
= kzalloc(sizeof(*blacklist
) * blacklist_len
, GFP_KERNEL
);
528 profile_cfg
= kzalloc(sizeof(*profile_cfg
), GFP_KERNEL
);
534 cmd
.data
[0] = blacklist
;
535 cmd
.len
[0] = sizeof(*blacklist
) * blacklist_len
;
536 cmd
.data
[1] = profile_cfg
;
538 /* No blacklist configuration */
540 profile_cfg
->num_profiles
= req
->n_match_sets
;
541 profile_cfg
->active_clients
= SCAN_CLIENT_SCHED_SCAN
;
542 profile_cfg
->pass_match
= SCAN_CLIENT_SCHED_SCAN
;
543 profile_cfg
->match_notify
= SCAN_CLIENT_SCHED_SCAN
;
544 if (!req
->n_match_sets
|| !req
->match_sets
[0].ssid
.ssid_len
)
545 profile_cfg
->any_beacon_notify
= SCAN_CLIENT_SCHED_SCAN
;
547 for (i
= 0; i
< req
->n_match_sets
; i
++) {
548 profile
= &profile_cfg
->profiles
[i
];
549 profile
->ssid_index
= i
;
550 /* Support any cipher and auth algorithm */
551 profile
->unicast_cipher
= 0xff;
552 profile
->auth_alg
= 0xff;
553 profile
->network_type
= IWL_NETWORK_TYPE_ANY
;
554 profile
->band_selection
= IWL_SCAN_OFFLOAD_SELECT_ANY
;
555 profile
->client_bitmap
= SCAN_CLIENT_SCHED_SCAN
;
558 IWL_DEBUG_SCAN(mvm
, "Sending scheduled scan profile config\n");
560 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
568 static bool iwl_mvm_scan_pass_all(struct iwl_mvm
*mvm
,
569 struct cfg80211_sched_scan_request
*req
)
571 if (req
->n_match_sets
&& req
->match_sets
[0].ssid
.ssid_len
) {
573 "Sending scheduled scan with filtering, n_match_sets %d\n",
575 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_DISABLED
;
579 IWL_DEBUG_SCAN(mvm
, "Sending Scheduled scan without filtering\n");
581 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_ENABLED
;
585 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm
*mvm
)
588 struct iwl_host_cmd cmd
= {
589 .id
= SCAN_OFFLOAD_ABORT_CMD
,
593 ret
= iwl_mvm_send_cmd_status(mvm
, &cmd
, &status
);
597 if (status
!= CAN_ABORT_STATUS
) {
599 * The scan abort will return 1 for success or
600 * 2 for "failure". A failure condition can be
601 * due to simply not being in an active scan which
602 * can occur if we send the scan abort before the
603 * microcode has notified us that a scan is completed.
605 IWL_DEBUG_SCAN(mvm
, "SCAN OFFLOAD ABORT ret %d.\n", status
);
612 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm
*mvm
,
613 struct iwl_scan_req_tx_cmd
*tx_cmd
,
616 tx_cmd
[0].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
618 tx_cmd
[0].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
621 tx_cmd
[0].sta_id
= mvm
->aux_sta
.sta_id
;
623 tx_cmd
[1].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
625 tx_cmd
[1].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
628 tx_cmd
[1].sta_id
= mvm
->aux_sta
.sta_id
;
632 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm
*mvm
,
633 struct ieee80211_channel
**channels
,
634 int n_channels
, u32 ssid_bitmap
,
635 struct iwl_scan_req_lmac
*cmd
)
637 struct iwl_scan_channel_cfg_lmac
*channel_cfg
= (void *)&cmd
->data
;
640 for (i
= 0; i
< n_channels
; i
++) {
641 channel_cfg
[i
].channel_num
=
642 cpu_to_le16(channels
[i
]->hw_value
);
643 channel_cfg
[i
].iter_count
= cpu_to_le16(1);
644 channel_cfg
[i
].iter_interval
= 0;
645 channel_cfg
[i
].flags
=
646 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL
|
651 static u8
*iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm
*mvm
, const u8
*ies
,
652 size_t len
, u8
*const pos
)
654 static const u8 before_ds_params
[] = {
658 WLAN_EID_EXT_SUPP_RATES
,
663 if (!iwl_mvm_rrm_scan_needed(mvm
)) {
664 memcpy(newpos
, ies
, len
);
668 offs
= ieee80211_ie_split(ies
, len
,
670 ARRAY_SIZE(before_ds_params
),
673 memcpy(newpos
, ies
, offs
);
676 /* Add a placeholder for DS Parameter Set element */
677 *newpos
++ = WLAN_EID_DS_PARAMS
;
681 memcpy(newpos
, ies
+ offs
, len
- offs
);
682 newpos
+= len
- offs
;
688 iwl_mvm_build_scan_probe(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
689 struct ieee80211_scan_ies
*ies
,
690 struct iwl_mvm_scan_params
*params
)
692 struct ieee80211_mgmt
*frame
= (void *)params
->preq
.buf
;
694 const u8
*mac_addr
= params
->flags
& NL80211_SCAN_FLAG_RANDOM_ADDR
?
695 params
->mac_addr
: NULL
;
698 * Unfortunately, right now the offload scan doesn't support randomising
699 * within the firmware, so until the firmware API is ready we implement
700 * it in the driver. This means that the scan iterations won't really be
701 * random, only when it's restarted, but at least that helps a bit.
704 get_random_mask_addr(frame
->sa
, mac_addr
,
705 params
->mac_addr_mask
);
707 memcpy(frame
->sa
, vif
->addr
, ETH_ALEN
);
709 frame
->frame_control
= cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
);
710 eth_broadcast_addr(frame
->da
);
711 eth_broadcast_addr(frame
->bssid
);
714 pos
= frame
->u
.probe_req
.variable
;
715 *pos
++ = WLAN_EID_SSID
;
718 params
->preq
.mac_header
.offset
= 0;
719 params
->preq
.mac_header
.len
= cpu_to_le16(24 + 2);
721 /* Insert ds parameter set element on 2.4 GHz band */
722 newpos
= iwl_mvm_copy_and_insert_ds_elem(mvm
,
723 ies
->ies
[NL80211_BAND_2GHZ
],
724 ies
->len
[NL80211_BAND_2GHZ
],
726 params
->preq
.band_data
[0].offset
= cpu_to_le16(pos
- params
->preq
.buf
);
727 params
->preq
.band_data
[0].len
= cpu_to_le16(newpos
- pos
);
730 memcpy(pos
, ies
->ies
[NL80211_BAND_5GHZ
],
731 ies
->len
[NL80211_BAND_5GHZ
]);
732 params
->preq
.band_data
[1].offset
= cpu_to_le16(pos
- params
->preq
.buf
);
733 params
->preq
.band_data
[1].len
=
734 cpu_to_le16(ies
->len
[NL80211_BAND_5GHZ
]);
735 pos
+= ies
->len
[NL80211_BAND_5GHZ
];
737 memcpy(pos
, ies
->common_ies
, ies
->common_ie_len
);
738 params
->preq
.common_data
.offset
= cpu_to_le16(pos
- params
->preq
.buf
);
739 params
->preq
.common_data
.len
= cpu_to_le16(ies
->common_ie_len
);
742 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm
*mvm
,
743 struct iwl_scan_req_lmac
*cmd
,
744 struct iwl_mvm_scan_params
*params
)
746 cmd
->active_dwell
= scan_timing
[params
->type
].dwell_active
;
747 cmd
->passive_dwell
= scan_timing
[params
->type
].dwell_passive
;
748 cmd
->fragmented_dwell
= scan_timing
[params
->type
].dwell_fragmented
;
749 cmd
->extended_dwell
= scan_timing
[params
->type
].dwell_extended
;
750 cmd
->max_out_time
= cpu_to_le32(scan_timing
[params
->type
].max_out_time
);
751 cmd
->suspend_time
= cpu_to_le32(scan_timing
[params
->type
].suspend_time
);
752 cmd
->scan_prio
= cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6
);
755 static inline bool iwl_mvm_scan_fits(struct iwl_mvm
*mvm
, int n_ssids
,
756 struct ieee80211_scan_ies
*ies
,
759 return ((n_ssids
<= PROBE_OPTION_MAX
) &&
760 (n_channels
<= mvm
->fw
->ucode_capa
.n_scan_channels
) &
761 (ies
->common_ie_len
+
762 ies
->len
[NL80211_BAND_2GHZ
] +
763 ies
->len
[NL80211_BAND_5GHZ
] <=
764 iwl_mvm_max_scan_ie_fw_cmd_room(mvm
)));
767 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm
*mvm
,
768 struct ieee80211_vif
*vif
)
770 const struct iwl_ucode_capabilities
*capa
= &mvm
->fw
->ucode_capa
;
772 /* We can only use EBS if:
773 * 1. the feature is supported;
774 * 2. the last EBS was successful;
775 * 3. if only single scan, the single scan EBS API is supported;
776 * 4. it's not a p2p find operation.
778 return ((capa
->flags
& IWL_UCODE_TLV_FLAGS_EBS_SUPPORT
) &&
779 mvm
->last_ebs_successful
&&
780 vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
);
783 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params
*params
)
785 return params
->n_scan_plans
== 1 &&
786 params
->scan_plans
[0].iterations
== 1;
789 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm
*mvm
,
790 struct iwl_mvm_scan_params
*params
,
791 struct ieee80211_vif
*vif
)
795 if (params
->n_ssids
== 0)
796 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE
;
798 if (params
->n_ssids
== 1 && params
->ssids
[0].ssid_len
!= 0)
799 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION
;
801 if (params
->type
== IWL_SCAN_TYPE_FRAGMENTED
)
802 flags
|= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED
;
804 if (iwl_mvm_rrm_scan_needed(mvm
))
805 flags
|= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED
;
807 if (params
->pass_all
)
808 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL
;
810 flags
|= IWL_MVM_LMAC_SCAN_FLAG_MATCH
;
812 #ifdef CONFIG_IWLWIFI_DEBUGFS
813 if (mvm
->scan_iter_notif_enabled
)
814 flags
|= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE
;
817 if (mvm
->sched_scan_pass_all
== SCHED_SCAN_PASS_ALL_ENABLED
)
818 flags
|= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE
;
820 if (iwl_mvm_is_regular_scan(params
) &&
821 vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&&
822 params
->type
!= IWL_SCAN_TYPE_FRAGMENTED
)
823 flags
|= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL
;
828 static int iwl_mvm_scan_lmac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
829 struct iwl_mvm_scan_params
*params
)
831 struct iwl_scan_req_lmac
*cmd
= mvm
->scan_cmd
;
832 struct iwl_scan_probe_req
*preq
=
833 (void *)(cmd
->data
+ sizeof(struct iwl_scan_channel_cfg_lmac
) *
834 mvm
->fw
->ucode_capa
.n_scan_channels
);
838 lockdep_assert_held(&mvm
->mutex
);
840 memset(cmd
, 0, ksize(cmd
));
842 if (WARN_ON(params
->n_scan_plans
> IWL_MAX_SCHED_SCAN_PLANS
))
845 iwl_mvm_scan_lmac_dwell(mvm
, cmd
, params
);
847 cmd
->rx_chain_select
= iwl_mvm_scan_rx_chain(mvm
);
848 cmd
->iter_num
= cpu_to_le32(1);
849 cmd
->n_channels
= (u8
)params
->n_channels
;
851 cmd
->delay
= cpu_to_le32(params
->delay
);
853 cmd
->scan_flags
= cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm
, params
,
856 cmd
->flags
= iwl_mvm_scan_rxon_flags(params
->channels
[0]->band
);
857 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
|
858 MAC_FILTER_IN_BEACON
);
859 iwl_mvm_scan_fill_tx_cmd(mvm
, cmd
->tx_cmd
, params
->no_cck
);
860 iwl_scan_build_ssids(params
, cmd
->direct_scan
, &ssid_bitmap
);
862 /* this API uses bits 1-20 instead of 0-19 */
865 for (i
= 0; i
< params
->n_scan_plans
; i
++) {
866 struct cfg80211_sched_scan_plan
*scan_plan
=
867 ¶ms
->scan_plans
[i
];
869 cmd
->schedule
[i
].delay
=
870 cpu_to_le16(scan_plan
->interval
);
871 cmd
->schedule
[i
].iterations
= scan_plan
->iterations
;
872 cmd
->schedule
[i
].full_scan_mul
= 1;
876 * If the number of iterations of the last scan plan is set to
877 * zero, it should run infinitely. However, this is not always the case.
878 * For example, when regular scan is requested the driver sets one scan
879 * plan with one iteration.
881 if (!cmd
->schedule
[i
- 1].iterations
)
882 cmd
->schedule
[i
- 1].iterations
= 0xff;
884 if (iwl_mvm_scan_use_ebs(mvm
, vif
)) {
885 cmd
->channel_opt
[0].flags
=
886 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
887 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
888 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
889 cmd
->channel_opt
[0].non_ebs_ratio
=
890 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO
);
891 cmd
->channel_opt
[1].flags
=
892 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
893 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
894 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
895 cmd
->channel_opt
[1].non_ebs_ratio
=
896 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO
);
899 iwl_mvm_lmac_scan_cfg_channels(mvm
, params
->channels
,
900 params
->n_channels
, ssid_bitmap
, cmd
);
902 *preq
= params
->preq
;
907 static int rate_to_scan_rate_flag(unsigned int rate
)
909 static const int rate_to_scan_rate
[IWL_RATE_COUNT
] = {
910 [IWL_RATE_1M_INDEX
] = SCAN_CONFIG_RATE_1M
,
911 [IWL_RATE_2M_INDEX
] = SCAN_CONFIG_RATE_2M
,
912 [IWL_RATE_5M_INDEX
] = SCAN_CONFIG_RATE_5M
,
913 [IWL_RATE_11M_INDEX
] = SCAN_CONFIG_RATE_11M
,
914 [IWL_RATE_6M_INDEX
] = SCAN_CONFIG_RATE_6M
,
915 [IWL_RATE_9M_INDEX
] = SCAN_CONFIG_RATE_9M
,
916 [IWL_RATE_12M_INDEX
] = SCAN_CONFIG_RATE_12M
,
917 [IWL_RATE_18M_INDEX
] = SCAN_CONFIG_RATE_18M
,
918 [IWL_RATE_24M_INDEX
] = SCAN_CONFIG_RATE_24M
,
919 [IWL_RATE_36M_INDEX
] = SCAN_CONFIG_RATE_36M
,
920 [IWL_RATE_48M_INDEX
] = SCAN_CONFIG_RATE_48M
,
921 [IWL_RATE_54M_INDEX
] = SCAN_CONFIG_RATE_54M
,
924 return rate_to_scan_rate
[rate
];
927 static __le32
iwl_mvm_scan_config_rates(struct iwl_mvm
*mvm
)
929 struct ieee80211_supported_band
*band
;
930 unsigned int rates
= 0;
933 band
= &mvm
->nvm_data
->bands
[NL80211_BAND_2GHZ
];
934 for (i
= 0; i
< band
->n_bitrates
; i
++)
935 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
936 band
= &mvm
->nvm_data
->bands
[NL80211_BAND_5GHZ
];
937 for (i
= 0; i
< band
->n_bitrates
; i
++)
938 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
940 /* Set both basic rates and supported rates */
941 rates
|= SCAN_CONFIG_SUPPORTED_RATE(rates
);
943 return cpu_to_le32(rates
);
946 int iwl_mvm_config_scan(struct iwl_mvm
*mvm
)
948 struct iwl_scan_config
*scan_config
;
949 struct ieee80211_supported_band
*band
;
951 mvm
->nvm_data
->bands
[NL80211_BAND_2GHZ
].n_channels
+
952 mvm
->nvm_data
->bands
[NL80211_BAND_5GHZ
].n_channels
;
953 int ret
, i
, j
= 0, cmd_size
;
954 struct iwl_host_cmd cmd
= {
955 .id
= iwl_cmd_id(SCAN_CFG_CMD
, IWL_ALWAYS_LONG_GROUP
, 0),
957 enum iwl_mvm_scan_type type
= iwl_mvm_get_scan_type(mvm
, false);
959 if (WARN_ON(num_channels
> mvm
->fw
->ucode_capa
.n_scan_channels
))
962 if (type
== mvm
->scan_type
) {
964 "Ignoring UMAC scan config of the same type\n");
968 cmd_size
= sizeof(*scan_config
) + mvm
->fw
->ucode_capa
.n_scan_channels
;
970 scan_config
= kzalloc(cmd_size
, GFP_KERNEL
);
974 scan_config
->flags
= cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE
|
975 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS
|
976 SCAN_CONFIG_FLAG_SET_TX_CHAINS
|
977 SCAN_CONFIG_FLAG_SET_RX_CHAINS
|
978 SCAN_CONFIG_FLAG_SET_AUX_STA_ID
|
979 SCAN_CONFIG_FLAG_SET_ALL_TIMES
|
980 SCAN_CONFIG_FLAG_SET_LEGACY_RATES
|
981 SCAN_CONFIG_FLAG_SET_MAC_ADDR
|
982 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS
|
983 SCAN_CONFIG_N_CHANNELS(num_channels
) |
984 (type
== IWL_SCAN_TYPE_FRAGMENTED
?
985 SCAN_CONFIG_FLAG_SET_FRAGMENTED
:
986 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED
));
987 scan_config
->tx_chains
= cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm
));
988 scan_config
->rx_chains
= cpu_to_le32(iwl_mvm_scan_rx_ant(mvm
));
989 scan_config
->legacy_rates
= iwl_mvm_scan_config_rates(mvm
);
990 scan_config
->out_of_channel_time
=
991 cpu_to_le32(scan_timing
[type
].max_out_time
);
992 scan_config
->suspend_time
= cpu_to_le32(scan_timing
[type
].suspend_time
);
993 scan_config
->dwell_active
= scan_timing
[type
].dwell_active
;
994 scan_config
->dwell_passive
= scan_timing
[type
].dwell_passive
;
995 scan_config
->dwell_fragmented
= scan_timing
[type
].dwell_fragmented
;
996 scan_config
->dwell_extended
= scan_timing
[type
].dwell_extended
;
998 memcpy(&scan_config
->mac_addr
, &mvm
->addresses
[0].addr
, ETH_ALEN
);
1000 scan_config
->bcast_sta_id
= mvm
->aux_sta
.sta_id
;
1001 scan_config
->channel_flags
= IWL_CHANNEL_FLAG_EBS
|
1002 IWL_CHANNEL_FLAG_ACCURATE_EBS
|
1003 IWL_CHANNEL_FLAG_EBS_ADD
|
1004 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE
;
1006 band
= &mvm
->nvm_data
->bands
[NL80211_BAND_2GHZ
];
1007 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
1008 scan_config
->channel_array
[j
] = band
->channels
[i
].hw_value
;
1009 band
= &mvm
->nvm_data
->bands
[NL80211_BAND_5GHZ
];
1010 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
1011 scan_config
->channel_array
[j
] = band
->channels
[i
].hw_value
;
1013 cmd
.data
[0] = scan_config
;
1014 cmd
.len
[0] = cmd_size
;
1015 cmd
.dataflags
[0] = IWL_HCMD_DFL_NOCOPY
;
1017 IWL_DEBUG_SCAN(mvm
, "Sending UMAC scan config\n");
1019 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
1021 mvm
->scan_type
= type
;
1027 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm
*mvm
, int status
)
1031 for (i
= 0; i
< mvm
->max_scans
; i
++)
1032 if (mvm
->scan_uid_status
[i
] == status
)
1038 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm
*mvm
,
1039 struct iwl_scan_req_umac
*cmd
,
1040 struct iwl_mvm_scan_params
*params
)
1042 if (params
->measurement_dwell
) {
1043 cmd
->active_dwell
= params
->measurement_dwell
;
1044 cmd
->passive_dwell
= params
->measurement_dwell
;
1045 cmd
->extended_dwell
= params
->measurement_dwell
;
1047 cmd
->active_dwell
= scan_timing
[params
->type
].dwell_active
;
1048 cmd
->passive_dwell
= scan_timing
[params
->type
].dwell_passive
;
1049 cmd
->extended_dwell
= scan_timing
[params
->type
].dwell_extended
;
1051 cmd
->fragmented_dwell
= scan_timing
[params
->type
].dwell_fragmented
;
1052 cmd
->max_out_time
= cpu_to_le32(scan_timing
[params
->type
].max_out_time
);
1053 cmd
->suspend_time
= cpu_to_le32(scan_timing
[params
->type
].suspend_time
);
1054 cmd
->scan_priority
= cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6
);
1056 if (iwl_mvm_is_regular_scan(params
))
1057 cmd
->ooc_priority
= cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6
);
1059 cmd
->ooc_priority
= cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2
);
1063 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm
*mvm
,
1064 struct ieee80211_channel
**channels
,
1065 int n_channels
, u32 ssid_bitmap
,
1066 struct iwl_scan_req_umac
*cmd
)
1068 struct iwl_scan_channel_cfg_umac
*channel_cfg
= (void *)&cmd
->data
;
1071 for (i
= 0; i
< n_channels
; i
++) {
1072 channel_cfg
[i
].flags
= cpu_to_le32(ssid_bitmap
);
1073 channel_cfg
[i
].channel_num
= channels
[i
]->hw_value
;
1074 channel_cfg
[i
].iter_count
= 1;
1075 channel_cfg
[i
].iter_interval
= 0;
1079 static u16
iwl_mvm_scan_umac_flags(struct iwl_mvm
*mvm
,
1080 struct iwl_mvm_scan_params
*params
,
1081 struct ieee80211_vif
*vif
)
1085 if (params
->n_ssids
== 0)
1086 flags
= IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE
;
1088 if (params
->n_ssids
== 1 && params
->ssids
[0].ssid_len
!= 0)
1089 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT
;
1091 if (params
->type
== IWL_SCAN_TYPE_FRAGMENTED
)
1092 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED
;
1094 if (iwl_mvm_rrm_scan_needed(mvm
))
1095 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED
;
1097 if (params
->pass_all
)
1098 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL
;
1100 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_MATCH
;
1102 if (!iwl_mvm_is_regular_scan(params
))
1103 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC
;
1105 if (params
->measurement_dwell
)
1106 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE
;
1108 #ifdef CONFIG_IWLWIFI_DEBUGFS
1109 if (mvm
->scan_iter_notif_enabled
)
1110 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE
;
1113 if (mvm
->sched_scan_pass_all
== SCHED_SCAN_PASS_ALL_ENABLED
)
1114 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE
;
1116 if (iwl_mvm_is_regular_scan(params
) &&
1117 vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&&
1118 params
->type
!= IWL_SCAN_TYPE_FRAGMENTED
)
1119 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL
;
1124 static int iwl_mvm_scan_umac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1125 struct iwl_mvm_scan_params
*params
,
1128 struct iwl_scan_req_umac
*cmd
= mvm
->scan_cmd
;
1129 struct iwl_scan_req_umac_tail
*sec_part
= (void *)&cmd
->data
+
1130 sizeof(struct iwl_scan_channel_cfg_umac
) *
1131 mvm
->fw
->ucode_capa
.n_scan_channels
;
1133 u32 ssid_bitmap
= 0;
1134 struct iwl_mvm_vif
*scan_vif
= iwl_mvm_vif_from_mac80211(vif
);
1136 lockdep_assert_held(&mvm
->mutex
);
1138 if (WARN_ON(params
->n_scan_plans
> IWL_MAX_SCHED_SCAN_PLANS
))
1141 uid
= iwl_mvm_scan_uid_by_status(mvm
, 0);
1145 memset(cmd
, 0, ksize(cmd
));
1147 iwl_mvm_scan_umac_dwell(mvm
, cmd
, params
);
1149 mvm
->scan_uid_status
[uid
] = type
;
1151 cmd
->uid
= cpu_to_le32(uid
);
1152 cmd
->general_flags
= cpu_to_le16(iwl_mvm_scan_umac_flags(mvm
, params
,
1154 cmd
->scan_start_mac_id
= scan_vif
->id
;
1156 if (type
== IWL_MVM_SCAN_SCHED
|| type
== IWL_MVM_SCAN_NETDETECT
)
1157 cmd
->flags
= cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE
);
1159 if (iwl_mvm_scan_use_ebs(mvm
, vif
))
1160 cmd
->channel_flags
= IWL_SCAN_CHANNEL_FLAG_EBS
|
1161 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
1162 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
;
1164 cmd
->n_channels
= params
->n_channels
;
1166 iwl_scan_build_ssids(params
, sec_part
->direct_scan
, &ssid_bitmap
);
1168 iwl_mvm_umac_scan_cfg_channels(mvm
, params
->channels
,
1169 params
->n_channels
, ssid_bitmap
, cmd
);
1171 for (i
= 0; i
< params
->n_scan_plans
; i
++) {
1172 struct cfg80211_sched_scan_plan
*scan_plan
=
1173 ¶ms
->scan_plans
[i
];
1175 sec_part
->schedule
[i
].iter_count
= scan_plan
->iterations
;
1176 sec_part
->schedule
[i
].interval
=
1177 cpu_to_le16(scan_plan
->interval
);
1181 * If the number of iterations of the last scan plan is set to
1182 * zero, it should run infinitely. However, this is not always the case.
1183 * For example, when regular scan is requested the driver sets one scan
1184 * plan with one iteration.
1186 if (!sec_part
->schedule
[i
- 1].iter_count
)
1187 sec_part
->schedule
[i
- 1].iter_count
= 0xff;
1189 sec_part
->delay
= cpu_to_le16(params
->delay
);
1190 sec_part
->preq
= params
->preq
;
1195 static int iwl_mvm_num_scans(struct iwl_mvm
*mvm
)
1197 return hweight32(mvm
->scan_status
& IWL_MVM_SCAN_MASK
);
1200 static int iwl_mvm_check_running_scans(struct iwl_mvm
*mvm
, int type
)
1202 bool unified_image
= fw_has_capa(&mvm
->fw
->ucode_capa
,
1203 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG
);
1205 /* This looks a bit arbitrary, but the idea is that if we run
1206 * out of possible simultaneous scans and the userspace is
1207 * trying to run a scan type that is already running, we
1208 * return -EBUSY. But if the userspace wants to start a
1209 * different type of scan, we stop the opposite type to make
1210 * space for the new request. The reason is backwards
1211 * compatibility with old wpa_supplicant that wouldn't stop a
1212 * scheduled scan before starting a normal scan.
1215 if (iwl_mvm_num_scans(mvm
) < mvm
->max_scans
)
1218 /* Use a switch, even though this is a bitmask, so that more
1219 * than one bits set will fall in default and we will warn.
1222 case IWL_MVM_SCAN_REGULAR
:
1223 if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR_MASK
)
1225 return iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_SCHED
, true);
1226 case IWL_MVM_SCAN_SCHED
:
1227 if (mvm
->scan_status
& IWL_MVM_SCAN_SCHED_MASK
)
1229 return iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_REGULAR
, true);
1230 case IWL_MVM_SCAN_NETDETECT
:
1231 /* For non-unified images, there's no need to stop
1232 * anything for net-detect since the firmware is
1233 * restarted anyway. This way, any sched scans that
1234 * were running will be restarted when we resume.
1239 /* If this is a unified image and we ran out of scans,
1240 * we need to stop something. Prefer stopping regular
1241 * scans, because the results are useless at this
1242 * point, and we should be able to keep running
1243 * another scheduled scan while suspended.
1245 if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR_MASK
)
1246 return iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_REGULAR
,
1248 if (mvm
->scan_status
& IWL_MVM_SCAN_SCHED_MASK
)
1249 return iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_SCHED
,
1252 /* fall through, something is wrong if no scan was
1253 * running but we ran out of scans.
1263 #define SCAN_TIMEOUT 20000
1265 void iwl_mvm_scan_timeout_wk(struct work_struct
*work
)
1267 struct delayed_work
*delayed_work
= to_delayed_work(work
);
1268 struct iwl_mvm
*mvm
= container_of(delayed_work
, struct iwl_mvm
,
1269 scan_timeout_dwork
);
1271 IWL_ERR(mvm
, "regular scan timed out\n");
1273 iwl_force_nmi(mvm
->trans
);
1276 int iwl_mvm_reg_scan_start(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1277 struct cfg80211_scan_request
*req
,
1278 struct ieee80211_scan_ies
*ies
)
1280 struct iwl_host_cmd hcmd
= {
1281 .len
= { iwl_mvm_scan_size(mvm
), },
1282 .data
= { mvm
->scan_cmd
, },
1283 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1285 struct iwl_mvm_scan_params params
= {};
1287 struct cfg80211_sched_scan_plan scan_plan
= { .iterations
= 1 };
1289 lockdep_assert_held(&mvm
->mutex
);
1291 if (iwl_mvm_is_lar_supported(mvm
) && !mvm
->lar_regdom_set
) {
1292 IWL_ERR(mvm
, "scan while LAR regdomain is not set\n");
1296 ret
= iwl_mvm_check_running_scans(mvm
, IWL_MVM_SCAN_REGULAR
);
1300 /* we should have failed registration if scan_cmd was NULL */
1301 if (WARN_ON(!mvm
->scan_cmd
))
1304 if (!iwl_mvm_scan_fits(mvm
, req
->n_ssids
, ies
, req
->n_channels
))
1307 params
.n_ssids
= req
->n_ssids
;
1308 params
.flags
= req
->flags
;
1309 params
.n_channels
= req
->n_channels
;
1311 params
.ssids
= req
->ssids
;
1312 params
.channels
= req
->channels
;
1313 params
.mac_addr
= req
->mac_addr
;
1314 params
.mac_addr_mask
= req
->mac_addr_mask
;
1315 params
.no_cck
= req
->no_cck
;
1316 params
.pass_all
= true;
1317 params
.n_match_sets
= 0;
1318 params
.match_sets
= NULL
;
1320 params
.scan_plans
= &scan_plan
;
1321 params
.n_scan_plans
= 1;
1324 iwl_mvm_get_scan_type(mvm
,
1325 vif
->type
== NL80211_IFTYPE_P2P_DEVICE
);
1327 ret
= iwl_mvm_get_measurement_dwell(mvm
, req
, ¶ms
);
1331 params
.measurement_dwell
= ret
;
1333 iwl_mvm_build_scan_probe(mvm
, vif
, ies
, ¶ms
);
1335 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1336 hcmd
.id
= iwl_cmd_id(SCAN_REQ_UMAC
, IWL_ALWAYS_LONG_GROUP
, 0);
1337 ret
= iwl_mvm_scan_umac(mvm
, vif
, ¶ms
,
1338 IWL_MVM_SCAN_REGULAR
);
1340 hcmd
.id
= SCAN_OFFLOAD_REQUEST_CMD
;
1341 ret
= iwl_mvm_scan_lmac(mvm
, vif
, ¶ms
);
1347 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1349 /* If the scan failed, it usually means that the FW was unable
1350 * to allocate the time events. Warn on it, but maybe we
1351 * should try to send the command again with different params.
1353 IWL_ERR(mvm
, "Scan failed! ret %d\n", ret
);
1357 IWL_DEBUG_SCAN(mvm
, "Scan request was sent successfully\n");
1358 mvm
->scan_status
|= IWL_MVM_SCAN_REGULAR
;
1359 mvm
->scan_vif
= iwl_mvm_vif_from_mac80211(vif
);
1360 iwl_mvm_ref(mvm
, IWL_MVM_REF_SCAN
);
1362 queue_delayed_work(system_wq
, &mvm
->scan_timeout_dwork
,
1363 msecs_to_jiffies(SCAN_TIMEOUT
));
1368 int iwl_mvm_sched_scan_start(struct iwl_mvm
*mvm
,
1369 struct ieee80211_vif
*vif
,
1370 struct cfg80211_sched_scan_request
*req
,
1371 struct ieee80211_scan_ies
*ies
,
1374 struct iwl_host_cmd hcmd
= {
1375 .len
= { iwl_mvm_scan_size(mvm
), },
1376 .data
= { mvm
->scan_cmd
, },
1377 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1379 struct iwl_mvm_scan_params params
= {};
1382 lockdep_assert_held(&mvm
->mutex
);
1384 if (iwl_mvm_is_lar_supported(mvm
) && !mvm
->lar_regdom_set
) {
1385 IWL_ERR(mvm
, "sched-scan while LAR regdomain is not set\n");
1389 ret
= iwl_mvm_check_running_scans(mvm
, type
);
1393 /* we should have failed registration if scan_cmd was NULL */
1394 if (WARN_ON(!mvm
->scan_cmd
))
1397 if (!iwl_mvm_scan_fits(mvm
, req
->n_ssids
, ies
, req
->n_channels
))
1400 params
.n_ssids
= req
->n_ssids
;
1401 params
.flags
= req
->flags
;
1402 params
.n_channels
= req
->n_channels
;
1403 params
.ssids
= req
->ssids
;
1404 params
.channels
= req
->channels
;
1405 params
.mac_addr
= req
->mac_addr
;
1406 params
.mac_addr_mask
= req
->mac_addr_mask
;
1407 params
.no_cck
= false;
1408 params
.pass_all
= iwl_mvm_scan_pass_all(mvm
, req
);
1409 params
.n_match_sets
= req
->n_match_sets
;
1410 params
.match_sets
= req
->match_sets
;
1411 if (!req
->n_scan_plans
)
1414 params
.n_scan_plans
= req
->n_scan_plans
;
1415 params
.scan_plans
= req
->scan_plans
;
1418 iwl_mvm_get_scan_type(mvm
,
1419 vif
->type
== NL80211_IFTYPE_P2P_DEVICE
);
1421 /* In theory, LMAC scans can handle a 32-bit delay, but since
1422 * waiting for over 18 hours to start the scan is a bit silly
1423 * and to keep it aligned with UMAC scans (which only support
1424 * 16-bit delays), trim it down to 16-bits.
1426 if (req
->delay
> U16_MAX
) {
1428 "delay value is > 16-bits, set to max possible\n");
1429 params
.delay
= U16_MAX
;
1431 params
.delay
= req
->delay
;
1434 ret
= iwl_mvm_config_sched_scan_profiles(mvm
, req
);
1438 iwl_mvm_build_scan_probe(mvm
, vif
, ies
, ¶ms
);
1440 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1441 hcmd
.id
= iwl_cmd_id(SCAN_REQ_UMAC
, IWL_ALWAYS_LONG_GROUP
, 0);
1442 ret
= iwl_mvm_scan_umac(mvm
, vif
, ¶ms
, type
);
1444 hcmd
.id
= SCAN_OFFLOAD_REQUEST_CMD
;
1445 ret
= iwl_mvm_scan_lmac(mvm
, vif
, ¶ms
);
1451 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1454 "Sched scan request was sent successfully\n");
1455 mvm
->scan_status
|= type
;
1457 /* If the scan failed, it usually means that the FW was unable
1458 * to allocate the time events. Warn on it, but maybe we
1459 * should try to send the command again with different params.
1461 IWL_ERR(mvm
, "Sched scan failed! ret %d\n", ret
);
1467 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm
*mvm
,
1468 struct iwl_rx_cmd_buffer
*rxb
)
1470 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1471 struct iwl_umac_scan_complete
*notif
= (void *)pkt
->data
;
1472 u32 uid
= __le32_to_cpu(notif
->uid
);
1473 bool aborted
= (notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
1475 if (WARN_ON(!(mvm
->scan_uid_status
[uid
] & mvm
->scan_status
)))
1478 /* if the scan is already stopping, we don't need to notify mac80211 */
1479 if (mvm
->scan_uid_status
[uid
] == IWL_MVM_SCAN_REGULAR
) {
1480 struct cfg80211_scan_info info
= {
1482 .scan_start_tsf
= mvm
->scan_start
,
1485 memcpy(info
.tsf_bssid
, mvm
->scan_vif
->bssid
, ETH_ALEN
);
1486 ieee80211_scan_completed(mvm
->hw
, &info
);
1487 mvm
->scan_vif
= NULL
;
1488 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1489 cancel_delayed_work(&mvm
->scan_timeout_dwork
);
1490 } else if (mvm
->scan_uid_status
[uid
] == IWL_MVM_SCAN_SCHED
) {
1491 ieee80211_sched_scan_stopped(mvm
->hw
);
1492 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_DISABLED
;
1495 mvm
->scan_status
&= ~mvm
->scan_uid_status
[uid
];
1497 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1498 uid
, mvm
->scan_uid_status
[uid
],
1499 notif
->status
== IWL_SCAN_OFFLOAD_COMPLETED
?
1500 "completed" : "aborted",
1501 iwl_mvm_ebs_status_str(notif
->ebs_status
));
1503 "Last line %d, Last iteration %d, Time from last iteration %d\n",
1504 notif
->last_schedule
, notif
->last_iter
,
1505 __le32_to_cpu(notif
->time_from_last_iter
));
1507 if (notif
->ebs_status
!= IWL_SCAN_EBS_SUCCESS
&&
1508 notif
->ebs_status
!= IWL_SCAN_EBS_INACTIVE
)
1509 mvm
->last_ebs_successful
= false;
1511 mvm
->scan_uid_status
[uid
] = 0;
1514 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm
*mvm
,
1515 struct iwl_rx_cmd_buffer
*rxb
)
1517 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1518 struct iwl_umac_scan_iter_complete_notif
*notif
= (void *)pkt
->data
;
1521 mvm
->scan_start
= le64_to_cpu(notif
->start_tsf
);
1524 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1525 notif
->status
, notif
->scanned_channels
,
1526 iwl_mvm_dump_channel_list(notif
->results
,
1527 notif
->scanned_channels
, buf
,
1530 if (mvm
->sched_scan_pass_all
== SCHED_SCAN_PASS_ALL_FOUND
) {
1531 IWL_DEBUG_SCAN(mvm
, "Pass all scheduled scan results found\n");
1532 ieee80211_sched_scan_results(mvm
->hw
);
1533 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_ENABLED
;
1537 "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
1541 static int iwl_mvm_umac_scan_abort(struct iwl_mvm
*mvm
, int type
)
1543 struct iwl_umac_scan_abort cmd
= {};
1546 lockdep_assert_held(&mvm
->mutex
);
1548 /* We should always get a valid index here, because we already
1549 * checked that this type of scan was running in the generic
1552 uid
= iwl_mvm_scan_uid_by_status(mvm
, type
);
1553 if (WARN_ON_ONCE(uid
< 0))
1556 cmd
.uid
= cpu_to_le32(uid
);
1558 IWL_DEBUG_SCAN(mvm
, "Sending scan abort, uid %u\n", uid
);
1560 ret
= iwl_mvm_send_cmd_pdu(mvm
,
1561 iwl_cmd_id(SCAN_ABORT_UMAC
,
1562 IWL_ALWAYS_LONG_GROUP
, 0),
1563 0, sizeof(cmd
), &cmd
);
1565 mvm
->scan_uid_status
[uid
] = type
<< IWL_MVM_SCAN_STOPPING_SHIFT
;
1570 static int iwl_mvm_scan_stop_wait(struct iwl_mvm
*mvm
, int type
)
1572 struct iwl_notification_wait wait_scan_done
;
1573 static const u16 scan_done_notif
[] = { SCAN_COMPLETE_UMAC
,
1574 SCAN_OFFLOAD_COMPLETE
, };
1577 lockdep_assert_held(&mvm
->mutex
);
1579 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_scan_done
,
1581 ARRAY_SIZE(scan_done_notif
),
1584 IWL_DEBUG_SCAN(mvm
, "Preparing to stop scan, type %x\n", type
);
1586 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
))
1587 ret
= iwl_mvm_umac_scan_abort(mvm
, type
);
1589 ret
= iwl_mvm_lmac_scan_abort(mvm
);
1592 IWL_DEBUG_SCAN(mvm
, "couldn't stop scan type %d\n", type
);
1593 iwl_remove_notification(&mvm
->notif_wait
, &wait_scan_done
);
1597 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_scan_done
, 1 * HZ
);
1602 int iwl_mvm_scan_size(struct iwl_mvm
*mvm
)
1604 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
))
1605 return sizeof(struct iwl_scan_req_umac
) +
1606 sizeof(struct iwl_scan_channel_cfg_umac
) *
1607 mvm
->fw
->ucode_capa
.n_scan_channels
+
1608 sizeof(struct iwl_scan_req_umac_tail
);
1610 return sizeof(struct iwl_scan_req_lmac
) +
1611 sizeof(struct iwl_scan_channel_cfg_lmac
) *
1612 mvm
->fw
->ucode_capa
.n_scan_channels
+
1613 sizeof(struct iwl_scan_probe_req
);
1617 * This function is used in nic restart flow, to inform mac80211 about scans
1618 * that was aborted by restart flow or by an assert.
1620 void iwl_mvm_report_scan_aborted(struct iwl_mvm
*mvm
)
1622 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1625 uid
= iwl_mvm_scan_uid_by_status(mvm
, IWL_MVM_SCAN_REGULAR
);
1627 struct cfg80211_scan_info info
= {
1631 ieee80211_scan_completed(mvm
->hw
, &info
);
1632 mvm
->scan_uid_status
[uid
] = 0;
1634 uid
= iwl_mvm_scan_uid_by_status(mvm
, IWL_MVM_SCAN_SCHED
);
1635 if (uid
>= 0 && !mvm
->restart_fw
) {
1636 ieee80211_sched_scan_stopped(mvm
->hw
);
1637 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_DISABLED
;
1638 mvm
->scan_uid_status
[uid
] = 0;
1641 /* We shouldn't have any UIDs still set. Loop over all the
1642 * UIDs to make sure there's nothing left there and warn if
1645 for (i
= 0; i
< mvm
->max_scans
; i
++) {
1646 if (WARN_ONCE(mvm
->scan_uid_status
[i
],
1647 "UMAC scan UID %d status was not cleaned\n",
1649 mvm
->scan_uid_status
[i
] = 0;
1652 if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
) {
1653 struct cfg80211_scan_info info
= {
1657 ieee80211_scan_completed(mvm
->hw
, &info
);
1660 /* Sched scan will be restarted by mac80211 in
1661 * restart_hw, so do not report if FW is about to be
1664 if ((mvm
->scan_status
& IWL_MVM_SCAN_SCHED
) &&
1666 ieee80211_sched_scan_stopped(mvm
->hw
);
1667 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_DISABLED
;
1672 int iwl_mvm_scan_stop(struct iwl_mvm
*mvm
, int type
, bool notify
)
1676 if (!(mvm
->scan_status
& type
))
1679 if (iwl_mvm_is_radio_killed(mvm
)) {
1684 ret
= iwl_mvm_scan_stop_wait(mvm
, type
);
1686 mvm
->scan_status
|= type
<< IWL_MVM_SCAN_STOPPING_SHIFT
;
1688 /* Clear the scan status so the next scan requests will
1689 * succeed and mark the scan as stopping, so that the Rx
1690 * handler doesn't do anything, as the scan was stopped from
1693 mvm
->scan_status
&= ~type
;
1695 if (type
== IWL_MVM_SCAN_REGULAR
) {
1696 /* Since the rx handler won't do anything now, we have
1697 * to release the scan reference here.
1699 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1700 cancel_delayed_work(&mvm
->scan_timeout_dwork
);
1702 struct cfg80211_scan_info info
= {
1706 ieee80211_scan_completed(mvm
->hw
, &info
);
1708 } else if (notify
) {
1709 ieee80211_sched_scan_stopped(mvm
->hw
);
1710 mvm
->sched_scan_pass_all
= SCHED_SCAN_PASS_ALL_DISABLED
;