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
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.
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.
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,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <linuxwifi@intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
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
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.
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.
64 *****************************************************************************/
66 #include <linux/etherdevice.h>
67 #include <net/mac80211.h>
70 #include "fw-api-scan.h"
72 #define IWL_DENSE_EBS_SCAN_RATIO 5
73 #define IWL_SPARSE_EBS_SCAN_RATIO 1
75 enum iwl_mvm_traffic_load
{
77 IWL_MVM_TRAFFIC_MEDIUM
,
81 struct iwl_mvm_scan_timing_params
{
90 static struct iwl_mvm_scan_timing_params scan_timing
[] = {
91 [IWL_SCAN_TYPE_UNASSOC
] = {
94 .dwell_fragmented
= 44,
99 [IWL_SCAN_TYPE_WILD
] = {
101 .dwell_passive
= 110,
102 .dwell_fragmented
= 44,
103 .dwell_extended
= 90,
107 [IWL_SCAN_TYPE_MILD
] = {
109 .dwell_passive
= 110,
110 .dwell_fragmented
= 44,
111 .dwell_extended
= 90,
115 [IWL_SCAN_TYPE_FRAGMENTED
] = {
117 .dwell_passive
= 110,
118 .dwell_fragmented
= 44,
124 struct iwl_mvm_scan_params
{
125 enum iwl_mvm_scan_type type
;
129 struct cfg80211_ssid
*ssids
;
130 struct ieee80211_channel
**channels
;
137 struct iwl_scan_probe_req preq
;
138 struct cfg80211_match_set
*match_sets
;
140 struct cfg80211_sched_scan_plan
*scan_plans
;
143 static u8
iwl_mvm_scan_rx_ant(struct iwl_mvm
*mvm
)
145 if (mvm
->scan_rx_ant
!= ANT_NONE
)
146 return mvm
->scan_rx_ant
;
147 return iwl_mvm_get_valid_rx_ant(mvm
);
150 static inline __le16
iwl_mvm_scan_rx_chain(struct iwl_mvm
*mvm
)
155 rx_ant
= iwl_mvm_scan_rx_ant(mvm
);
156 rx_chain
= rx_ant
<< PHY_RX_CHAIN_VALID_POS
;
157 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_MIMO_SEL_POS
;
158 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_SEL_POS
;
159 rx_chain
|= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS
;
160 return cpu_to_le16(rx_chain
);
163 static __le32
iwl_mvm_scan_rxon_flags(enum ieee80211_band band
)
165 if (band
== IEEE80211_BAND_2GHZ
)
166 return cpu_to_le32(PHY_BAND_24
);
168 return cpu_to_le32(PHY_BAND_5
);
172 iwl_mvm_scan_rate_n_flags(struct iwl_mvm
*mvm
, enum ieee80211_band band
,
177 mvm
->scan_last_antenna_idx
=
178 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
179 mvm
->scan_last_antenna_idx
);
180 tx_ant
= BIT(mvm
->scan_last_antenna_idx
) << RATE_MCS_ANT_POS
;
182 if (band
== IEEE80211_BAND_2GHZ
&& !no_cck
)
183 return cpu_to_le32(IWL_RATE_1M_PLCP
| RATE_MCS_CCK_MSK
|
186 return cpu_to_le32(IWL_RATE_6M_PLCP
| tx_ant
);
189 static void iwl_mvm_scan_condition_iterator(void *data
, u8
*mac
,
190 struct ieee80211_vif
*vif
)
192 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
193 int *global_cnt
= data
;
195 if (vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&& mvmvif
->phy_ctxt
&&
196 mvmvif
->phy_ctxt
->id
< MAX_PHYS
)
200 static enum iwl_mvm_traffic_load
iwl_mvm_get_traffic_load(struct iwl_mvm
*mvm
)
202 return IWL_MVM_TRAFFIC_LOW
;
206 iwl_mvm_scan_type
iwl_mvm_get_scan_type(struct iwl_mvm
*mvm
, bool p2p_device
)
209 enum iwl_mvm_traffic_load load
;
212 ieee80211_iterate_active_interfaces_atomic(mvm
->hw
,
213 IEEE80211_IFACE_ITER_NORMAL
,
214 iwl_mvm_scan_condition_iterator
,
217 return IWL_SCAN_TYPE_UNASSOC
;
219 load
= iwl_mvm_get_traffic_load(mvm
);
220 low_latency
= iwl_mvm_low_latency(mvm
);
222 if ((load
== IWL_MVM_TRAFFIC_HIGH
|| low_latency
) && !p2p_device
&&
223 fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_FRAGMENTED_SCAN
))
224 return IWL_SCAN_TYPE_FRAGMENTED
;
226 if (load
>= IWL_MVM_TRAFFIC_MEDIUM
|| low_latency
)
227 return IWL_SCAN_TYPE_MILD
;
229 return IWL_SCAN_TYPE_WILD
;
232 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm
*mvm
)
234 /* require rrm scan whenever the fw supports it */
235 return fw_has_capa(&mvm
->fw
->ucode_capa
,
236 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT
);
239 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm
*mvm
)
243 max_probe_len
= SCAN_OFFLOAD_PROBE_REQ_SIZE
;
245 /* we create the 802.11 header and SSID element */
246 max_probe_len
-= 24 + 2;
248 /* DS parameter set element is added on 2.4GHZ band if required */
249 if (iwl_mvm_rrm_scan_needed(mvm
))
252 return max_probe_len
;
255 int iwl_mvm_max_scan_ie_len(struct iwl_mvm
*mvm
)
257 int max_ie_len
= iwl_mvm_max_scan_ie_fw_cmd_room(mvm
);
259 /* TODO: [BUG] This function should return the maximum allowed size of
260 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
261 * in the same command. So the correct implementation of this function
262 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
263 * command has only 512 bytes and it would leave us with about 240
264 * bytes for scan IEs, which is clearly not enough. So meanwhile
265 * we will report an incorrect value. This may result in a failure to
266 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
267 * functions with -ENOBUFS, if a large enough probe will be provided.
272 static u8
*iwl_mvm_dump_channel_list(struct iwl_scan_results_notif
*res
,
273 int num_res
, u8
*buf
, size_t buf_size
)
276 u8
*pos
= buf
, *end
= buf
+ buf_size
;
278 for (i
= 0; pos
< end
&& i
< num_res
; i
++)
279 pos
+= snprintf(pos
, end
- pos
, " %u", res
[i
].channel
);
281 /* terminate the string in case the buffer was too short */
282 *(buf
+ buf_size
- 1) = '\0';
287 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm
*mvm
,
288 struct iwl_rx_cmd_buffer
*rxb
)
290 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
291 struct iwl_lmac_scan_complete_notif
*notif
= (void *)pkt
->data
;
295 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
296 notif
->status
, notif
->scanned_channels
,
297 iwl_mvm_dump_channel_list(notif
->results
,
298 notif
->scanned_channels
, buf
,
302 void iwl_mvm_rx_scan_match_found(struct iwl_mvm
*mvm
,
303 struct iwl_rx_cmd_buffer
*rxb
)
305 IWL_DEBUG_SCAN(mvm
, "Scheduled scan results\n");
306 ieee80211_sched_scan_results(mvm
->hw
);
309 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status
)
312 case IWL_SCAN_EBS_SUCCESS
:
314 case IWL_SCAN_EBS_INACTIVE
:
316 case IWL_SCAN_EBS_FAILED
:
317 case IWL_SCAN_EBS_CHAN_NOT_FOUND
:
323 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm
*mvm
,
324 struct iwl_rx_cmd_buffer
*rxb
)
326 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
327 struct iwl_periodic_scan_complete
*scan_notif
= (void *)pkt
->data
;
328 bool aborted
= (scan_notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
330 /* If this happens, the firmware has mistakenly sent an LMAC
331 * notification during UMAC scans -- warn and ignore it.
333 if (WARN_ON_ONCE(fw_has_capa(&mvm
->fw
->ucode_capa
,
334 IWL_UCODE_TLV_CAPA_UMAC_SCAN
)))
337 /* scan status must be locked for proper checking */
338 lockdep_assert_held(&mvm
->mutex
);
340 /* We first check if we were stopping a scan, in which case we
341 * just clear the stopping flag. Then we check if it was a
342 * firmware initiated stop, in which case we need to inform
344 * Note that we can have a stopping and a running scan
345 * simultaneously, but we can't have two different types of
346 * scans stopping or running at the same time (since LMAC
347 * doesn't support it).
350 if (mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_SCHED
) {
351 WARN_ON_ONCE(mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_REGULAR
);
353 IWL_DEBUG_SCAN(mvm
, "Scheduled scan %s, EBS status %s\n",
354 aborted
? "aborted" : "completed",
355 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
357 "Last line %d, Last iteration %d, Time after last iteration %d\n",
358 scan_notif
->last_schedule_line
,
359 scan_notif
->last_schedule_iteration
,
360 __le32_to_cpu(scan_notif
->time_after_last_iter
));
362 mvm
->scan_status
&= ~IWL_MVM_SCAN_STOPPING_SCHED
;
363 } else if (mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_REGULAR
) {
364 IWL_DEBUG_SCAN(mvm
, "Regular scan %s, EBS status %s\n",
365 aborted
? "aborted" : "completed",
366 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
368 mvm
->scan_status
&= ~IWL_MVM_SCAN_STOPPING_REGULAR
;
369 } else if (mvm
->scan_status
& IWL_MVM_SCAN_SCHED
) {
370 WARN_ON_ONCE(mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
);
372 IWL_DEBUG_SCAN(mvm
, "Scheduled scan %s, EBS status %s\n",
373 aborted
? "aborted" : "completed",
374 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
376 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
377 scan_notif
->last_schedule_line
,
378 scan_notif
->last_schedule_iteration
,
379 __le32_to_cpu(scan_notif
->time_after_last_iter
));
381 mvm
->scan_status
&= ~IWL_MVM_SCAN_SCHED
;
382 ieee80211_sched_scan_stopped(mvm
->hw
);
383 } else if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
) {
384 IWL_DEBUG_SCAN(mvm
, "Regular scan %s, EBS status %s (FW)\n",
385 aborted
? "aborted" : "completed",
386 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
388 mvm
->scan_status
&= ~IWL_MVM_SCAN_REGULAR
;
389 ieee80211_scan_completed(mvm
->hw
,
390 scan_notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
391 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
394 mvm
->last_ebs_successful
=
395 scan_notif
->ebs_status
== IWL_SCAN_EBS_SUCCESS
||
396 scan_notif
->ebs_status
== IWL_SCAN_EBS_INACTIVE
;
399 static int iwl_ssid_exist(u8
*ssid
, u8 ssid_len
, struct iwl_ssid_ie
*ssid_list
)
403 for (i
= 0; i
< PROBE_OPTION_MAX
; i
++) {
404 if (!ssid_list
[i
].len
)
406 if (ssid_list
[i
].len
== ssid_len
&&
407 !memcmp(ssid_list
->ssid
, ssid
, ssid_len
))
413 /* We insert the SSIDs in an inverted order, because the FW will
416 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params
*params
,
417 struct iwl_ssid_ie
*ssids
,
424 * copy SSIDs from match list.
425 * iwl_config_sched_scan_profiles() uses the order of these ssids to
428 for (i
= 0, j
= params
->n_match_sets
- 1;
429 j
>= 0 && i
< PROBE_OPTION_MAX
;
431 /* skip empty SSID matchsets */
432 if (!params
->match_sets
[j
].ssid
.ssid_len
)
434 ssids
[i
].id
= WLAN_EID_SSID
;
435 ssids
[i
].len
= params
->match_sets
[j
].ssid
.ssid_len
;
436 memcpy(ssids
[i
].ssid
, params
->match_sets
[j
].ssid
.ssid
,
440 /* add SSIDs from scan SSID list */
442 for (j
= params
->n_ssids
- 1;
443 j
>= 0 && i
< PROBE_OPTION_MAX
;
445 index
= iwl_ssid_exist(params
->ssids
[j
].ssid
,
446 params
->ssids
[j
].ssid_len
,
449 ssids
[i
].id
= WLAN_EID_SSID
;
450 ssids
[i
].len
= params
->ssids
[j
].ssid_len
;
451 memcpy(ssids
[i
].ssid
, params
->ssids
[j
].ssid
,
453 *ssid_bitmap
|= BIT(i
);
455 *ssid_bitmap
|= BIT(index
);
461 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm
*mvm
,
462 struct cfg80211_sched_scan_request
*req
)
464 struct iwl_scan_offload_profile
*profile
;
465 struct iwl_scan_offload_profile_cfg
*profile_cfg
;
466 struct iwl_scan_offload_blacklist
*blacklist
;
467 struct iwl_host_cmd cmd
= {
468 .id
= SCAN_OFFLOAD_UPDATE_PROFILES_CMD
,
469 .len
[1] = sizeof(*profile_cfg
),
470 .dataflags
[0] = IWL_HCMD_DFL_NOCOPY
,
471 .dataflags
[1] = IWL_HCMD_DFL_NOCOPY
,
477 if (WARN_ON(req
->n_match_sets
> IWL_SCAN_MAX_PROFILES
))
480 if (mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_SHORT_BL
)
481 blacklist_len
= IWL_SCAN_SHORT_BLACKLIST_LEN
;
483 blacklist_len
= IWL_SCAN_MAX_BLACKLIST_LEN
;
485 blacklist
= kzalloc(sizeof(*blacklist
) * blacklist_len
, GFP_KERNEL
);
489 profile_cfg
= kzalloc(sizeof(*profile_cfg
), GFP_KERNEL
);
495 cmd
.data
[0] = blacklist
;
496 cmd
.len
[0] = sizeof(*blacklist
) * blacklist_len
;
497 cmd
.data
[1] = profile_cfg
;
499 /* No blacklist configuration */
501 profile_cfg
->num_profiles
= req
->n_match_sets
;
502 profile_cfg
->active_clients
= SCAN_CLIENT_SCHED_SCAN
;
503 profile_cfg
->pass_match
= SCAN_CLIENT_SCHED_SCAN
;
504 profile_cfg
->match_notify
= SCAN_CLIENT_SCHED_SCAN
;
505 if (!req
->n_match_sets
|| !req
->match_sets
[0].ssid
.ssid_len
)
506 profile_cfg
->any_beacon_notify
= SCAN_CLIENT_SCHED_SCAN
;
508 for (i
= 0; i
< req
->n_match_sets
; i
++) {
509 profile
= &profile_cfg
->profiles
[i
];
510 profile
->ssid_index
= i
;
511 /* Support any cipher and auth algorithm */
512 profile
->unicast_cipher
= 0xff;
513 profile
->auth_alg
= 0xff;
514 profile
->network_type
= IWL_NETWORK_TYPE_ANY
;
515 profile
->band_selection
= IWL_SCAN_OFFLOAD_SELECT_ANY
;
516 profile
->client_bitmap
= SCAN_CLIENT_SCHED_SCAN
;
519 IWL_DEBUG_SCAN(mvm
, "Sending scheduled scan profile config\n");
521 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
529 static bool iwl_mvm_scan_pass_all(struct iwl_mvm
*mvm
,
530 struct cfg80211_sched_scan_request
*req
)
532 if (req
->n_match_sets
&& req
->match_sets
[0].ssid
.ssid_len
) {
534 "Sending scheduled scan with filtering, n_match_sets %d\n",
539 IWL_DEBUG_SCAN(mvm
, "Sending Scheduled scan without filtering\n");
543 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm
*mvm
)
546 struct iwl_host_cmd cmd
= {
547 .id
= SCAN_OFFLOAD_ABORT_CMD
,
551 ret
= iwl_mvm_send_cmd_status(mvm
, &cmd
, &status
);
555 if (status
!= CAN_ABORT_STATUS
) {
557 * The scan abort will return 1 for success or
558 * 2 for "failure". A failure condition can be
559 * due to simply not being in an active scan which
560 * can occur if we send the scan abort before the
561 * microcode has notified us that a scan is completed.
563 IWL_DEBUG_SCAN(mvm
, "SCAN OFFLOAD ABORT ret %d.\n", status
);
570 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm
*mvm
,
571 struct iwl_scan_req_tx_cmd
*tx_cmd
,
574 tx_cmd
[0].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
576 tx_cmd
[0].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
579 tx_cmd
[0].sta_id
= mvm
->aux_sta
.sta_id
;
581 tx_cmd
[1].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
583 tx_cmd
[1].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
586 tx_cmd
[1].sta_id
= mvm
->aux_sta
.sta_id
;
590 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm
*mvm
,
591 struct ieee80211_channel
**channels
,
592 int n_channels
, u32 ssid_bitmap
,
593 struct iwl_scan_req_lmac
*cmd
)
595 struct iwl_scan_channel_cfg_lmac
*channel_cfg
= (void *)&cmd
->data
;
598 for (i
= 0; i
< n_channels
; i
++) {
599 channel_cfg
[i
].channel_num
=
600 cpu_to_le16(channels
[i
]->hw_value
);
601 channel_cfg
[i
].iter_count
= cpu_to_le16(1);
602 channel_cfg
[i
].iter_interval
= 0;
603 channel_cfg
[i
].flags
=
604 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL
|
609 static u8
*iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm
*mvm
, const u8
*ies
,
610 size_t len
, u8
*const pos
)
612 static const u8 before_ds_params
[] = {
616 WLAN_EID_EXT_SUPP_RATES
,
621 if (!iwl_mvm_rrm_scan_needed(mvm
)) {
622 memcpy(newpos
, ies
, len
);
626 offs
= ieee80211_ie_split(ies
, len
,
628 ARRAY_SIZE(before_ds_params
),
631 memcpy(newpos
, ies
, offs
);
634 /* Add a placeholder for DS Parameter Set element */
635 *newpos
++ = WLAN_EID_DS_PARAMS
;
639 memcpy(newpos
, ies
+ offs
, len
- offs
);
640 newpos
+= len
- offs
;
646 iwl_mvm_build_scan_probe(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
647 struct ieee80211_scan_ies
*ies
,
648 struct iwl_mvm_scan_params
*params
)
650 struct ieee80211_mgmt
*frame
= (void *)params
->preq
.buf
;
652 const u8
*mac_addr
= params
->flags
& NL80211_SCAN_FLAG_RANDOM_ADDR
?
653 params
->mac_addr
: NULL
;
656 * Unfortunately, right now the offload scan doesn't support randomising
657 * within the firmware, so until the firmware API is ready we implement
658 * it in the driver. This means that the scan iterations won't really be
659 * random, only when it's restarted, but at least that helps a bit.
662 get_random_mask_addr(frame
->sa
, mac_addr
,
663 params
->mac_addr_mask
);
665 memcpy(frame
->sa
, vif
->addr
, ETH_ALEN
);
667 frame
->frame_control
= cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
);
668 eth_broadcast_addr(frame
->da
);
669 eth_broadcast_addr(frame
->bssid
);
672 pos
= frame
->u
.probe_req
.variable
;
673 *pos
++ = WLAN_EID_SSID
;
676 params
->preq
.mac_header
.offset
= 0;
677 params
->preq
.mac_header
.len
= cpu_to_le16(24 + 2);
679 /* Insert ds parameter set element on 2.4 GHz band */
680 newpos
= iwl_mvm_copy_and_insert_ds_elem(mvm
,
681 ies
->ies
[IEEE80211_BAND_2GHZ
],
682 ies
->len
[IEEE80211_BAND_2GHZ
],
684 params
->preq
.band_data
[0].offset
= cpu_to_le16(pos
- params
->preq
.buf
);
685 params
->preq
.band_data
[0].len
= cpu_to_le16(newpos
- pos
);
688 memcpy(pos
, ies
->ies
[IEEE80211_BAND_5GHZ
],
689 ies
->len
[IEEE80211_BAND_5GHZ
]);
690 params
->preq
.band_data
[1].offset
= cpu_to_le16(pos
- params
->preq
.buf
);
691 params
->preq
.band_data
[1].len
=
692 cpu_to_le16(ies
->len
[IEEE80211_BAND_5GHZ
]);
693 pos
+= ies
->len
[IEEE80211_BAND_5GHZ
];
695 memcpy(pos
, ies
->common_ies
, ies
->common_ie_len
);
696 params
->preq
.common_data
.offset
= cpu_to_le16(pos
- params
->preq
.buf
);
697 params
->preq
.common_data
.len
= cpu_to_le16(ies
->common_ie_len
);
700 static __le32
iwl_mvm_scan_priority(struct iwl_mvm
*mvm
,
701 enum iwl_scan_priority_ext prio
)
703 if (fw_has_api(&mvm
->fw
->ucode_capa
,
704 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY
))
705 return cpu_to_le32(prio
);
707 if (prio
<= IWL_SCAN_PRIORITY_EXT_2
)
708 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW
);
710 if (prio
<= IWL_SCAN_PRIORITY_EXT_4
)
711 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM
);
713 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH
);
716 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm
*mvm
,
717 struct iwl_scan_req_lmac
*cmd
,
718 struct iwl_mvm_scan_params
*params
)
720 cmd
->active_dwell
= scan_timing
[params
->type
].dwell_active
;
721 cmd
->passive_dwell
= scan_timing
[params
->type
].dwell_passive
;
722 cmd
->fragmented_dwell
= scan_timing
[params
->type
].dwell_fragmented
;
723 cmd
->extended_dwell
= scan_timing
[params
->type
].dwell_extended
;
724 cmd
->max_out_time
= cpu_to_le32(scan_timing
[params
->type
].max_out_time
);
725 cmd
->suspend_time
= cpu_to_le32(scan_timing
[params
->type
].suspend_time
);
726 cmd
->scan_prio
= iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_6
);
729 static inline bool iwl_mvm_scan_fits(struct iwl_mvm
*mvm
, int n_ssids
,
730 struct ieee80211_scan_ies
*ies
,
733 return ((n_ssids
<= PROBE_OPTION_MAX
) &&
734 (n_channels
<= mvm
->fw
->ucode_capa
.n_scan_channels
) &
735 (ies
->common_ie_len
+
736 ies
->len
[NL80211_BAND_2GHZ
] +
737 ies
->len
[NL80211_BAND_5GHZ
] <=
738 iwl_mvm_max_scan_ie_fw_cmd_room(mvm
)));
741 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm
*mvm
,
742 struct ieee80211_vif
*vif
)
744 const struct iwl_ucode_capabilities
*capa
= &mvm
->fw
->ucode_capa
;
746 /* We can only use EBS if:
747 * 1. the feature is supported;
748 * 2. the last EBS was successful;
749 * 3. if only single scan, the single scan EBS API is supported;
750 * 4. it's not a p2p find operation.
752 return ((capa
->flags
& IWL_UCODE_TLV_FLAGS_EBS_SUPPORT
) &&
753 mvm
->last_ebs_successful
&&
754 vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
);
757 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params
*params
)
759 return params
->n_scan_plans
== 1 &&
760 params
->scan_plans
[0].iterations
== 1;
763 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm
*mvm
,
764 struct iwl_mvm_scan_params
*params
,
765 struct ieee80211_vif
*vif
)
769 if (params
->n_ssids
== 0)
770 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE
;
772 if (params
->n_ssids
== 1 && params
->ssids
[0].ssid_len
!= 0)
773 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION
;
775 if (params
->type
== IWL_SCAN_TYPE_FRAGMENTED
)
776 flags
|= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED
;
778 if (iwl_mvm_rrm_scan_needed(mvm
))
779 flags
|= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED
;
781 if (params
->pass_all
)
782 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL
;
784 flags
|= IWL_MVM_LMAC_SCAN_FLAG_MATCH
;
786 #ifdef CONFIG_IWLWIFI_DEBUGFS
787 if (mvm
->scan_iter_notif_enabled
)
788 flags
|= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE
;
791 if (iwl_mvm_is_regular_scan(params
) &&
792 vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&&
793 params
->type
!= IWL_SCAN_TYPE_FRAGMENTED
)
794 flags
|= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL
;
799 static int iwl_mvm_scan_lmac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
800 struct iwl_mvm_scan_params
*params
)
802 struct iwl_scan_req_lmac
*cmd
= mvm
->scan_cmd
;
803 struct iwl_scan_probe_req
*preq
=
804 (void *)(cmd
->data
+ sizeof(struct iwl_scan_channel_cfg_lmac
) *
805 mvm
->fw
->ucode_capa
.n_scan_channels
);
809 lockdep_assert_held(&mvm
->mutex
);
811 memset(cmd
, 0, ksize(cmd
));
813 if (WARN_ON(params
->n_scan_plans
> IWL_MAX_SCHED_SCAN_PLANS
))
816 iwl_mvm_scan_lmac_dwell(mvm
, cmd
, params
);
818 cmd
->rx_chain_select
= iwl_mvm_scan_rx_chain(mvm
);
819 cmd
->iter_num
= cpu_to_le32(1);
820 cmd
->n_channels
= (u8
)params
->n_channels
;
822 cmd
->delay
= cpu_to_le32(params
->delay
);
824 cmd
->scan_flags
= cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm
, params
,
827 cmd
->flags
= iwl_mvm_scan_rxon_flags(params
->channels
[0]->band
);
828 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
|
829 MAC_FILTER_IN_BEACON
);
830 iwl_mvm_scan_fill_tx_cmd(mvm
, cmd
->tx_cmd
, params
->no_cck
);
831 iwl_scan_build_ssids(params
, cmd
->direct_scan
, &ssid_bitmap
);
833 /* this API uses bits 1-20 instead of 0-19 */
836 for (i
= 0; i
< params
->n_scan_plans
; i
++) {
837 struct cfg80211_sched_scan_plan
*scan_plan
=
838 ¶ms
->scan_plans
[i
];
840 cmd
->schedule
[i
].delay
=
841 cpu_to_le16(scan_plan
->interval
);
842 cmd
->schedule
[i
].iterations
= scan_plan
->iterations
;
843 cmd
->schedule
[i
].full_scan_mul
= 1;
847 * If the number of iterations of the last scan plan is set to
848 * zero, it should run infinitely. However, this is not always the case.
849 * For example, when regular scan is requested the driver sets one scan
850 * plan with one iteration.
852 if (!cmd
->schedule
[i
- 1].iterations
)
853 cmd
->schedule
[i
- 1].iterations
= 0xff;
855 if (iwl_mvm_scan_use_ebs(mvm
, vif
)) {
856 cmd
->channel_opt
[0].flags
=
857 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
858 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
859 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
860 cmd
->channel_opt
[0].non_ebs_ratio
=
861 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO
);
862 cmd
->channel_opt
[1].flags
=
863 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
864 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
865 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
866 cmd
->channel_opt
[1].non_ebs_ratio
=
867 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO
);
870 iwl_mvm_lmac_scan_cfg_channels(mvm
, params
->channels
,
871 params
->n_channels
, ssid_bitmap
, cmd
);
873 *preq
= params
->preq
;
878 static int rate_to_scan_rate_flag(unsigned int rate
)
880 static const int rate_to_scan_rate
[IWL_RATE_COUNT
] = {
881 [IWL_RATE_1M_INDEX
] = SCAN_CONFIG_RATE_1M
,
882 [IWL_RATE_2M_INDEX
] = SCAN_CONFIG_RATE_2M
,
883 [IWL_RATE_5M_INDEX
] = SCAN_CONFIG_RATE_5M
,
884 [IWL_RATE_11M_INDEX
] = SCAN_CONFIG_RATE_11M
,
885 [IWL_RATE_6M_INDEX
] = SCAN_CONFIG_RATE_6M
,
886 [IWL_RATE_9M_INDEX
] = SCAN_CONFIG_RATE_9M
,
887 [IWL_RATE_12M_INDEX
] = SCAN_CONFIG_RATE_12M
,
888 [IWL_RATE_18M_INDEX
] = SCAN_CONFIG_RATE_18M
,
889 [IWL_RATE_24M_INDEX
] = SCAN_CONFIG_RATE_24M
,
890 [IWL_RATE_36M_INDEX
] = SCAN_CONFIG_RATE_36M
,
891 [IWL_RATE_48M_INDEX
] = SCAN_CONFIG_RATE_48M
,
892 [IWL_RATE_54M_INDEX
] = SCAN_CONFIG_RATE_54M
,
895 return rate_to_scan_rate
[rate
];
898 static __le32
iwl_mvm_scan_config_rates(struct iwl_mvm
*mvm
)
900 struct ieee80211_supported_band
*band
;
901 unsigned int rates
= 0;
904 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
];
905 for (i
= 0; i
< band
->n_bitrates
; i
++)
906 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
907 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
];
908 for (i
= 0; i
< band
->n_bitrates
; i
++)
909 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
911 /* Set both basic rates and supported rates */
912 rates
|= SCAN_CONFIG_SUPPORTED_RATE(rates
);
914 return cpu_to_le32(rates
);
917 int iwl_mvm_config_scan(struct iwl_mvm
*mvm
)
919 struct iwl_scan_config
*scan_config
;
920 struct ieee80211_supported_band
*band
;
922 mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
].n_channels
+
923 mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
].n_channels
;
924 int ret
, i
, j
= 0, cmd_size
;
925 struct iwl_host_cmd cmd
= {
926 .id
= iwl_cmd_id(SCAN_CFG_CMD
, IWL_ALWAYS_LONG_GROUP
, 0),
928 enum iwl_mvm_scan_type type
= iwl_mvm_get_scan_type(mvm
, false);
930 if (WARN_ON(num_channels
> mvm
->fw
->ucode_capa
.n_scan_channels
))
933 if (type
== mvm
->scan_type
)
936 cmd_size
= sizeof(*scan_config
) + mvm
->fw
->ucode_capa
.n_scan_channels
;
938 scan_config
= kzalloc(cmd_size
, GFP_KERNEL
);
942 scan_config
->flags
= cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE
|
943 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS
|
944 SCAN_CONFIG_FLAG_SET_TX_CHAINS
|
945 SCAN_CONFIG_FLAG_SET_RX_CHAINS
|
946 SCAN_CONFIG_FLAG_SET_ALL_TIMES
|
947 SCAN_CONFIG_FLAG_SET_LEGACY_RATES
|
948 SCAN_CONFIG_FLAG_SET_MAC_ADDR
|
949 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS
|
950 SCAN_CONFIG_N_CHANNELS(num_channels
) |
951 (type
== IWL_SCAN_TYPE_FRAGMENTED
?
952 SCAN_CONFIG_FLAG_SET_FRAGMENTED
:
953 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED
));
954 scan_config
->tx_chains
= cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm
));
955 scan_config
->rx_chains
= cpu_to_le32(iwl_mvm_scan_rx_ant(mvm
));
956 scan_config
->legacy_rates
= iwl_mvm_scan_config_rates(mvm
);
957 scan_config
->out_of_channel_time
=
958 cpu_to_le32(scan_timing
[type
].max_out_time
);
959 scan_config
->suspend_time
= cpu_to_le32(scan_timing
[type
].suspend_time
);
960 scan_config
->dwell_active
= scan_timing
[type
].dwell_active
;
961 scan_config
->dwell_passive
= scan_timing
[type
].dwell_passive
;
962 scan_config
->dwell_fragmented
= scan_timing
[type
].dwell_fragmented
;
963 scan_config
->dwell_extended
= scan_timing
[type
].dwell_extended
;
965 memcpy(&scan_config
->mac_addr
, &mvm
->addresses
[0].addr
, ETH_ALEN
);
967 scan_config
->bcast_sta_id
= mvm
->aux_sta
.sta_id
;
968 scan_config
->channel_flags
= IWL_CHANNEL_FLAG_EBS
|
969 IWL_CHANNEL_FLAG_ACCURATE_EBS
|
970 IWL_CHANNEL_FLAG_EBS_ADD
|
971 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE
;
973 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
];
974 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
975 scan_config
->channel_array
[j
] = band
->channels
[i
].hw_value
;
976 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
];
977 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
978 scan_config
->channel_array
[j
] = band
->channels
[i
].hw_value
;
980 cmd
.data
[0] = scan_config
;
981 cmd
.len
[0] = cmd_size
;
982 cmd
.dataflags
[0] = IWL_HCMD_DFL_NOCOPY
;
984 IWL_DEBUG_SCAN(mvm
, "Sending UMAC scan config\n");
986 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
988 mvm
->scan_type
= type
;
994 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm
*mvm
, int status
)
998 for (i
= 0; i
< mvm
->max_scans
; i
++)
999 if (mvm
->scan_uid_status
[i
] == status
)
1005 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm
*mvm
,
1006 struct iwl_scan_req_umac
*cmd
,
1007 struct iwl_mvm_scan_params
*params
)
1009 cmd
->extended_dwell
= scan_timing
[params
->type
].dwell_extended
;
1010 cmd
->active_dwell
= scan_timing
[params
->type
].dwell_active
;
1011 cmd
->passive_dwell
= scan_timing
[params
->type
].dwell_passive
;
1012 cmd
->fragmented_dwell
= scan_timing
[params
->type
].dwell_fragmented
;
1013 cmd
->max_out_time
= cpu_to_le32(scan_timing
[params
->type
].max_out_time
);
1014 cmd
->suspend_time
= cpu_to_le32(scan_timing
[params
->type
].suspend_time
);
1015 cmd
->scan_priority
=
1016 iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_6
);
1018 if (iwl_mvm_is_regular_scan(params
))
1020 iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_6
);
1023 iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_2
);
1027 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm
*mvm
,
1028 struct ieee80211_channel
**channels
,
1029 int n_channels
, u32 ssid_bitmap
,
1030 struct iwl_scan_req_umac
*cmd
)
1032 struct iwl_scan_channel_cfg_umac
*channel_cfg
= (void *)&cmd
->data
;
1035 for (i
= 0; i
< n_channels
; i
++) {
1036 channel_cfg
[i
].flags
= cpu_to_le32(ssid_bitmap
);
1037 channel_cfg
[i
].channel_num
= channels
[i
]->hw_value
;
1038 channel_cfg
[i
].iter_count
= 1;
1039 channel_cfg
[i
].iter_interval
= 0;
1043 static u32
iwl_mvm_scan_umac_flags(struct iwl_mvm
*mvm
,
1044 struct iwl_mvm_scan_params
*params
,
1045 struct ieee80211_vif
*vif
)
1049 if (params
->n_ssids
== 0)
1050 flags
= IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE
;
1052 if (params
->n_ssids
== 1 && params
->ssids
[0].ssid_len
!= 0)
1053 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT
;
1055 if (params
->type
== IWL_SCAN_TYPE_FRAGMENTED
)
1056 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED
;
1058 if (iwl_mvm_rrm_scan_needed(mvm
))
1059 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED
;
1061 if (params
->pass_all
)
1062 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL
;
1064 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_MATCH
;
1066 if (!iwl_mvm_is_regular_scan(params
))
1067 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC
;
1069 #ifdef CONFIG_IWLWIFI_DEBUGFS
1070 if (mvm
->scan_iter_notif_enabled
)
1071 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE
;
1074 if (iwl_mvm_is_regular_scan(params
) &&
1075 vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&&
1076 params
->type
!= IWL_SCAN_TYPE_FRAGMENTED
)
1077 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL
;
1082 static int iwl_mvm_scan_umac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1083 struct iwl_mvm_scan_params
*params
,
1086 struct iwl_scan_req_umac
*cmd
= mvm
->scan_cmd
;
1087 struct iwl_scan_req_umac_tail
*sec_part
= (void *)&cmd
->data
+
1088 sizeof(struct iwl_scan_channel_cfg_umac
) *
1089 mvm
->fw
->ucode_capa
.n_scan_channels
;
1091 u32 ssid_bitmap
= 0;
1093 lockdep_assert_held(&mvm
->mutex
);
1095 if (WARN_ON(params
->n_scan_plans
> IWL_MAX_SCHED_SCAN_PLANS
))
1098 uid
= iwl_mvm_scan_uid_by_status(mvm
, 0);
1102 memset(cmd
, 0, ksize(cmd
));
1104 iwl_mvm_scan_umac_dwell(mvm
, cmd
, params
);
1106 mvm
->scan_uid_status
[uid
] = type
;
1108 cmd
->uid
= cpu_to_le32(uid
);
1109 cmd
->general_flags
= cpu_to_le32(iwl_mvm_scan_umac_flags(mvm
, params
,
1112 if (type
== IWL_MVM_SCAN_SCHED
)
1113 cmd
->flags
= cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE
);
1115 if (iwl_mvm_scan_use_ebs(mvm
, vif
))
1116 cmd
->channel_flags
= IWL_SCAN_CHANNEL_FLAG_EBS
|
1117 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
1118 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
;
1120 cmd
->n_channels
= params
->n_channels
;
1122 iwl_scan_build_ssids(params
, sec_part
->direct_scan
, &ssid_bitmap
);
1124 iwl_mvm_umac_scan_cfg_channels(mvm
, params
->channels
,
1125 params
->n_channels
, ssid_bitmap
, cmd
);
1127 for (i
= 0; i
< params
->n_scan_plans
; i
++) {
1128 struct cfg80211_sched_scan_plan
*scan_plan
=
1129 ¶ms
->scan_plans
[i
];
1131 sec_part
->schedule
[i
].iter_count
= scan_plan
->iterations
;
1132 sec_part
->schedule
[i
].interval
=
1133 cpu_to_le16(scan_plan
->interval
);
1137 * If the number of iterations of the last scan plan is set to
1138 * zero, it should run infinitely. However, this is not always the case.
1139 * For example, when regular scan is requested the driver sets one scan
1140 * plan with one iteration.
1142 if (!sec_part
->schedule
[i
- 1].iter_count
)
1143 sec_part
->schedule
[i
- 1].iter_count
= 0xff;
1145 sec_part
->delay
= cpu_to_le16(params
->delay
);
1146 sec_part
->preq
= params
->preq
;
1151 static int iwl_mvm_num_scans(struct iwl_mvm
*mvm
)
1153 return hweight32(mvm
->scan_status
& IWL_MVM_SCAN_MASK
);
1156 static int iwl_mvm_check_running_scans(struct iwl_mvm
*mvm
, int type
)
1158 /* This looks a bit arbitrary, but the idea is that if we run
1159 * out of possible simultaneous scans and the userspace is
1160 * trying to run a scan type that is already running, we
1161 * return -EBUSY. But if the userspace wants to start a
1162 * different type of scan, we stop the opposite type to make
1163 * space for the new request. The reason is backwards
1164 * compatibility with old wpa_supplicant that wouldn't stop a
1165 * scheduled scan before starting a normal scan.
1168 if (iwl_mvm_num_scans(mvm
) < mvm
->max_scans
)
1171 /* Use a switch, even though this is a bitmask, so that more
1172 * than one bits set will fall in default and we will warn.
1175 case IWL_MVM_SCAN_REGULAR
:
1176 if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR_MASK
)
1178 return iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_SCHED
, true);
1179 case IWL_MVM_SCAN_SCHED
:
1180 if (mvm
->scan_status
& IWL_MVM_SCAN_SCHED_MASK
)
1182 return iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_REGULAR
, true);
1183 case IWL_MVM_SCAN_NETDETECT
:
1184 /* No need to stop anything for net-detect since the
1185 * firmware is restarted anyway. This way, any sched
1186 * scans that were running will be restarted when we
1198 int iwl_mvm_reg_scan_start(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1199 struct cfg80211_scan_request
*req
,
1200 struct ieee80211_scan_ies
*ies
)
1202 struct iwl_host_cmd hcmd
= {
1203 .len
= { iwl_mvm_scan_size(mvm
), },
1204 .data
= { mvm
->scan_cmd
, },
1205 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1207 struct iwl_mvm_scan_params params
= {};
1209 struct cfg80211_sched_scan_plan scan_plan
= { .iterations
= 1 };
1211 lockdep_assert_held(&mvm
->mutex
);
1213 if (iwl_mvm_is_lar_supported(mvm
) && !mvm
->lar_regdom_set
) {
1214 IWL_ERR(mvm
, "scan while LAR regdomain is not set\n");
1218 ret
= iwl_mvm_check_running_scans(mvm
, IWL_MVM_SCAN_REGULAR
);
1222 /* we should have failed registration if scan_cmd was NULL */
1223 if (WARN_ON(!mvm
->scan_cmd
))
1226 if (!iwl_mvm_scan_fits(mvm
, req
->n_ssids
, ies
, req
->n_channels
))
1229 params
.n_ssids
= req
->n_ssids
;
1230 params
.flags
= req
->flags
;
1231 params
.n_channels
= req
->n_channels
;
1233 params
.ssids
= req
->ssids
;
1234 params
.channels
= req
->channels
;
1235 params
.mac_addr
= req
->mac_addr
;
1236 params
.mac_addr_mask
= req
->mac_addr_mask
;
1237 params
.no_cck
= req
->no_cck
;
1238 params
.pass_all
= true;
1239 params
.n_match_sets
= 0;
1240 params
.match_sets
= NULL
;
1242 params
.scan_plans
= &scan_plan
;
1243 params
.n_scan_plans
= 1;
1246 iwl_mvm_get_scan_type(mvm
,
1247 vif
->type
== NL80211_IFTYPE_P2P_DEVICE
);
1249 iwl_mvm_build_scan_probe(mvm
, vif
, ies
, ¶ms
);
1251 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1252 hcmd
.id
= iwl_cmd_id(SCAN_REQ_UMAC
, IWL_ALWAYS_LONG_GROUP
, 0);
1253 ret
= iwl_mvm_scan_umac(mvm
, vif
, ¶ms
,
1254 IWL_MVM_SCAN_REGULAR
);
1256 hcmd
.id
= SCAN_OFFLOAD_REQUEST_CMD
;
1257 ret
= iwl_mvm_scan_lmac(mvm
, vif
, ¶ms
);
1263 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1265 /* If the scan failed, it usually means that the FW was unable
1266 * to allocate the time events. Warn on it, but maybe we
1267 * should try to send the command again with different params.
1269 IWL_ERR(mvm
, "Scan failed! ret %d\n", ret
);
1273 IWL_DEBUG_SCAN(mvm
, "Scan request was sent successfully\n");
1274 mvm
->scan_status
|= IWL_MVM_SCAN_REGULAR
;
1275 iwl_mvm_ref(mvm
, IWL_MVM_REF_SCAN
);
1280 int iwl_mvm_sched_scan_start(struct iwl_mvm
*mvm
,
1281 struct ieee80211_vif
*vif
,
1282 struct cfg80211_sched_scan_request
*req
,
1283 struct ieee80211_scan_ies
*ies
,
1286 struct iwl_host_cmd hcmd
= {
1287 .len
= { iwl_mvm_scan_size(mvm
), },
1288 .data
= { mvm
->scan_cmd
, },
1289 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1291 struct iwl_mvm_scan_params params
= {};
1294 lockdep_assert_held(&mvm
->mutex
);
1296 if (iwl_mvm_is_lar_supported(mvm
) && !mvm
->lar_regdom_set
) {
1297 IWL_ERR(mvm
, "sched-scan while LAR regdomain is not set\n");
1301 /* we don't support "match all" in the firmware */
1302 if (!req
->n_match_sets
)
1305 ret
= iwl_mvm_check_running_scans(mvm
, type
);
1309 /* we should have failed registration if scan_cmd was NULL */
1310 if (WARN_ON(!mvm
->scan_cmd
))
1313 if (!iwl_mvm_scan_fits(mvm
, req
->n_ssids
, ies
, req
->n_channels
))
1316 params
.n_ssids
= req
->n_ssids
;
1317 params
.flags
= req
->flags
;
1318 params
.n_channels
= req
->n_channels
;
1319 params
.ssids
= req
->ssids
;
1320 params
.channels
= req
->channels
;
1321 params
.mac_addr
= req
->mac_addr
;
1322 params
.mac_addr_mask
= req
->mac_addr_mask
;
1323 params
.no_cck
= false;
1324 params
.pass_all
= iwl_mvm_scan_pass_all(mvm
, req
);
1325 params
.n_match_sets
= req
->n_match_sets
;
1326 params
.match_sets
= req
->match_sets
;
1327 if (!req
->n_scan_plans
)
1330 params
.n_scan_plans
= req
->n_scan_plans
;
1331 params
.scan_plans
= req
->scan_plans
;
1334 iwl_mvm_get_scan_type(mvm
,
1335 vif
->type
== NL80211_IFTYPE_P2P_DEVICE
);
1337 /* In theory, LMAC scans can handle a 32-bit delay, but since
1338 * waiting for over 18 hours to start the scan is a bit silly
1339 * and to keep it aligned with UMAC scans (which only support
1340 * 16-bit delays), trim it down to 16-bits.
1342 if (req
->delay
> U16_MAX
) {
1344 "delay value is > 16-bits, set to max possible\n");
1345 params
.delay
= U16_MAX
;
1347 params
.delay
= req
->delay
;
1350 ret
= iwl_mvm_config_sched_scan_profiles(mvm
, req
);
1354 iwl_mvm_build_scan_probe(mvm
, vif
, ies
, ¶ms
);
1356 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1357 hcmd
.id
= iwl_cmd_id(SCAN_REQ_UMAC
, IWL_ALWAYS_LONG_GROUP
, 0);
1358 ret
= iwl_mvm_scan_umac(mvm
, vif
, ¶ms
, IWL_MVM_SCAN_SCHED
);
1360 hcmd
.id
= SCAN_OFFLOAD_REQUEST_CMD
;
1361 ret
= iwl_mvm_scan_lmac(mvm
, vif
, ¶ms
);
1367 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1370 "Sched scan request was sent successfully\n");
1371 mvm
->scan_status
|= type
;
1373 /* If the scan failed, it usually means that the FW was unable
1374 * to allocate the time events. Warn on it, but maybe we
1375 * should try to send the command again with different params.
1377 IWL_ERR(mvm
, "Sched scan failed! ret %d\n", ret
);
1383 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm
*mvm
,
1384 struct iwl_rx_cmd_buffer
*rxb
)
1386 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1387 struct iwl_umac_scan_complete
*notif
= (void *)pkt
->data
;
1388 u32 uid
= __le32_to_cpu(notif
->uid
);
1389 bool aborted
= (notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
1391 if (WARN_ON(!(mvm
->scan_uid_status
[uid
] & mvm
->scan_status
)))
1394 /* if the scan is already stopping, we don't need to notify mac80211 */
1395 if (mvm
->scan_uid_status
[uid
] == IWL_MVM_SCAN_REGULAR
) {
1396 ieee80211_scan_completed(mvm
->hw
, aborted
);
1397 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1398 } else if (mvm
->scan_uid_status
[uid
] == IWL_MVM_SCAN_SCHED
) {
1399 ieee80211_sched_scan_stopped(mvm
->hw
);
1402 mvm
->scan_status
&= ~mvm
->scan_uid_status
[uid
];
1404 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1405 uid
, mvm
->scan_uid_status
[uid
],
1406 notif
->status
== IWL_SCAN_OFFLOAD_COMPLETED
?
1407 "completed" : "aborted",
1408 iwl_mvm_ebs_status_str(notif
->ebs_status
));
1410 "Last line %d, Last iteration %d, Time from last iteration %d\n",
1411 notif
->last_schedule
, notif
->last_iter
,
1412 __le32_to_cpu(notif
->time_from_last_iter
));
1414 if (notif
->ebs_status
!= IWL_SCAN_EBS_SUCCESS
&&
1415 notif
->ebs_status
!= IWL_SCAN_EBS_INACTIVE
)
1416 mvm
->last_ebs_successful
= false;
1418 mvm
->scan_uid_status
[uid
] = 0;
1421 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm
*mvm
,
1422 struct iwl_rx_cmd_buffer
*rxb
)
1424 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1425 struct iwl_umac_scan_iter_complete_notif
*notif
= (void *)pkt
->data
;
1429 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1430 notif
->status
, notif
->scanned_channels
,
1431 iwl_mvm_dump_channel_list(notif
->results
,
1432 notif
->scanned_channels
, buf
,
1436 static int iwl_mvm_umac_scan_abort(struct iwl_mvm
*mvm
, int type
)
1438 struct iwl_umac_scan_abort cmd
= {};
1441 lockdep_assert_held(&mvm
->mutex
);
1443 /* We should always get a valid index here, because we already
1444 * checked that this type of scan was running in the generic
1447 uid
= iwl_mvm_scan_uid_by_status(mvm
, type
);
1448 if (WARN_ON_ONCE(uid
< 0))
1451 cmd
.uid
= cpu_to_le32(uid
);
1453 IWL_DEBUG_SCAN(mvm
, "Sending scan abort, uid %u\n", uid
);
1455 ret
= iwl_mvm_send_cmd_pdu(mvm
,
1456 iwl_cmd_id(SCAN_ABORT_UMAC
,
1457 IWL_ALWAYS_LONG_GROUP
, 0),
1458 0, sizeof(cmd
), &cmd
);
1460 mvm
->scan_uid_status
[uid
] = type
<< IWL_MVM_SCAN_STOPPING_SHIFT
;
1465 static int iwl_mvm_scan_stop_wait(struct iwl_mvm
*mvm
, int type
)
1467 struct iwl_notification_wait wait_scan_done
;
1468 static const u16 scan_done_notif
[] = { SCAN_COMPLETE_UMAC
,
1469 SCAN_OFFLOAD_COMPLETE
, };
1472 lockdep_assert_held(&mvm
->mutex
);
1474 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_scan_done
,
1476 ARRAY_SIZE(scan_done_notif
),
1479 IWL_DEBUG_SCAN(mvm
, "Preparing to stop scan, type %x\n", type
);
1481 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
))
1482 ret
= iwl_mvm_umac_scan_abort(mvm
, type
);
1484 ret
= iwl_mvm_lmac_scan_abort(mvm
);
1487 IWL_DEBUG_SCAN(mvm
, "couldn't stop scan type %d\n", type
);
1488 iwl_remove_notification(&mvm
->notif_wait
, &wait_scan_done
);
1492 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_scan_done
, 1 * HZ
);
1497 int iwl_mvm_scan_size(struct iwl_mvm
*mvm
)
1499 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
))
1500 return sizeof(struct iwl_scan_req_umac
) +
1501 sizeof(struct iwl_scan_channel_cfg_umac
) *
1502 mvm
->fw
->ucode_capa
.n_scan_channels
+
1503 sizeof(struct iwl_scan_req_umac_tail
);
1505 return sizeof(struct iwl_scan_req_lmac
) +
1506 sizeof(struct iwl_scan_channel_cfg_lmac
) *
1507 mvm
->fw
->ucode_capa
.n_scan_channels
+
1508 sizeof(struct iwl_scan_probe_req
);
1512 * This function is used in nic restart flow, to inform mac80211 about scans
1513 * that was aborted by restart flow or by an assert.
1515 void iwl_mvm_report_scan_aborted(struct iwl_mvm
*mvm
)
1517 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1520 uid
= iwl_mvm_scan_uid_by_status(mvm
, IWL_MVM_SCAN_REGULAR
);
1522 ieee80211_scan_completed(mvm
->hw
, true);
1523 mvm
->scan_uid_status
[uid
] = 0;
1525 uid
= iwl_mvm_scan_uid_by_status(mvm
, IWL_MVM_SCAN_SCHED
);
1526 if (uid
>= 0 && !mvm
->restart_fw
) {
1527 ieee80211_sched_scan_stopped(mvm
->hw
);
1528 mvm
->scan_uid_status
[uid
] = 0;
1531 /* We shouldn't have any UIDs still set. Loop over all the
1532 * UIDs to make sure there's nothing left there and warn if
1535 for (i
= 0; i
< mvm
->max_scans
; i
++) {
1536 if (WARN_ONCE(mvm
->scan_uid_status
[i
],
1537 "UMAC scan UID %d status was not cleaned\n",
1539 mvm
->scan_uid_status
[i
] = 0;
1542 if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
)
1543 ieee80211_scan_completed(mvm
->hw
, true);
1545 /* Sched scan will be restarted by mac80211 in
1546 * restart_hw, so do not report if FW is about to be
1549 if ((mvm
->scan_status
& IWL_MVM_SCAN_SCHED
) && !mvm
->restart_fw
)
1550 ieee80211_sched_scan_stopped(mvm
->hw
);
1554 int iwl_mvm_scan_stop(struct iwl_mvm
*mvm
, int type
, bool notify
)
1558 if (!(mvm
->scan_status
& type
))
1561 if (iwl_mvm_is_radio_killed(mvm
)) {
1566 ret
= iwl_mvm_scan_stop_wait(mvm
, type
);
1568 mvm
->scan_status
|= type
<< IWL_MVM_SCAN_STOPPING_SHIFT
;
1570 /* Clear the scan status so the next scan requests will
1571 * succeed and mark the scan as stopping, so that the Rx
1572 * handler doesn't do anything, as the scan was stopped from
1575 mvm
->scan_status
&= ~type
;
1577 if (type
== IWL_MVM_SCAN_REGULAR
) {
1578 /* Since the rx handler won't do anything now, we have
1579 * to release the scan reference here.
1581 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1583 ieee80211_scan_completed(mvm
->hw
, true);
1584 } else if (notify
) {
1585 ieee80211_sched_scan_stopped(mvm
->hw
);