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 <ilw@linux.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 struct iwl_mvm_scan_params
{
78 bool passive_fragmented
;
82 struct cfg80211_ssid
*ssids
;
83 struct ieee80211_channel
**channels
;
84 u16 interval
; /* interval between scans (in secs) */
91 struct iwl_scan_probe_req preq
;
92 struct cfg80211_match_set
*match_sets
;
97 } dwell
[IEEE80211_NUM_BANDS
];
100 u8 full_scan_mul
; /* not used for UMAC */
104 static u8
iwl_mvm_scan_rx_ant(struct iwl_mvm
*mvm
)
106 if (mvm
->scan_rx_ant
!= ANT_NONE
)
107 return mvm
->scan_rx_ant
;
108 return iwl_mvm_get_valid_rx_ant(mvm
);
111 static inline __le16
iwl_mvm_scan_rx_chain(struct iwl_mvm
*mvm
)
116 rx_ant
= iwl_mvm_scan_rx_ant(mvm
);
117 rx_chain
= rx_ant
<< PHY_RX_CHAIN_VALID_POS
;
118 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_MIMO_SEL_POS
;
119 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_SEL_POS
;
120 rx_chain
|= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS
;
121 return cpu_to_le16(rx_chain
);
124 static __le32
iwl_mvm_scan_rxon_flags(enum ieee80211_band band
)
126 if (band
== IEEE80211_BAND_2GHZ
)
127 return cpu_to_le32(PHY_BAND_24
);
129 return cpu_to_le32(PHY_BAND_5
);
133 iwl_mvm_scan_rate_n_flags(struct iwl_mvm
*mvm
, enum ieee80211_band band
,
138 mvm
->scan_last_antenna_idx
=
139 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
140 mvm
->scan_last_antenna_idx
);
141 tx_ant
= BIT(mvm
->scan_last_antenna_idx
) << RATE_MCS_ANT_POS
;
143 if (band
== IEEE80211_BAND_2GHZ
&& !no_cck
)
144 return cpu_to_le32(IWL_RATE_1M_PLCP
| RATE_MCS_CCK_MSK
|
147 return cpu_to_le32(IWL_RATE_6M_PLCP
| tx_ant
);
151 * If req->n_ssids > 0, it means we should do an active scan.
152 * In case of active scan w/o directed scan, we receive a zero-length SSID
153 * just to notify that this scan is active and not passive.
154 * In order to notify the FW of the number of SSIDs we wish to scan (including
155 * the zero-length one), we need to set the corresponding bits in chan->type,
156 * one for each SSID, and set the active bit (first). If the first SSID is
157 * already included in the probe template, so we need to set only
158 * req->n_ssids - 1 bits in addition to the first bit.
160 static u16
iwl_mvm_get_active_dwell(struct iwl_mvm
*mvm
,
161 enum ieee80211_band band
, int n_ssids
)
163 if (fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_BASIC_DWELL
))
165 if (band
== IEEE80211_BAND_2GHZ
)
166 return 20 + 3 * (n_ssids
+ 1);
167 return 10 + 2 * (n_ssids
+ 1);
170 static u16
iwl_mvm_get_passive_dwell(struct iwl_mvm
*mvm
,
171 enum ieee80211_band band
)
173 if (fw_has_api(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_API_BASIC_DWELL
))
175 return band
== IEEE80211_BAND_2GHZ
? 100 + 20 : 100 + 10;
178 static void iwl_mvm_scan_condition_iterator(void *data
, u8
*mac
,
179 struct ieee80211_vif
*vif
)
181 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
182 int *global_cnt
= data
;
184 if (vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&& mvmvif
->phy_ctxt
&&
185 mvmvif
->phy_ctxt
->id
< MAX_PHYS
)
189 static void iwl_mvm_scan_calc_dwell(struct iwl_mvm
*mvm
,
190 struct ieee80211_vif
*vif
,
191 struct iwl_mvm_scan_params
*params
)
194 enum ieee80211_band band
;
195 u8 frag_passive_dwell
= 0;
197 ieee80211_iterate_active_interfaces_atomic(mvm
->hw
,
198 IEEE80211_IFACE_ITER_NORMAL
,
199 iwl_mvm_scan_condition_iterator
,
204 params
->suspend_time
= 30;
205 params
->max_out_time
= 120;
207 if (iwl_mvm_low_latency(mvm
)) {
208 if (fw_has_api(&mvm
->fw
->ucode_capa
,
209 IWL_UCODE_TLV_API_FRAGMENTED_SCAN
)) {
211 params
->suspend_time
= 105;
213 * If there is more than one active interface make
214 * passive scan more fragmented.
216 frag_passive_dwell
= 40;
217 params
->max_out_time
= frag_passive_dwell
;
219 params
->suspend_time
= 120;
220 params
->max_out_time
= 120;
224 if (frag_passive_dwell
&&
225 fw_has_api(&mvm
->fw
->ucode_capa
,
226 IWL_UCODE_TLV_API_FRAGMENTED_SCAN
)) {
228 * P2P device scan should not be fragmented to avoid negative
229 * impact on P2P device discovery. Configure max_out_time to be
230 * equal to dwell time on passive channel. Take a longest
231 * possible value, one that corresponds to 2GHz band
233 if (vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
235 iwl_mvm_get_passive_dwell(mvm
,
236 IEEE80211_BAND_2GHZ
);
237 params
->max_out_time
= passive_dwell
;
239 params
->passive_fragmented
= true;
243 if ((params
->flags
& NL80211_SCAN_FLAG_LOW_PRIORITY
) &&
244 (params
->max_out_time
> 200))
245 params
->max_out_time
= 200;
249 for (band
= IEEE80211_BAND_2GHZ
; band
< IEEE80211_NUM_BANDS
; band
++) {
250 if (params
->passive_fragmented
)
251 params
->dwell
[band
].fragmented
= frag_passive_dwell
;
253 params
->dwell
[band
].passive
= iwl_mvm_get_passive_dwell(mvm
,
255 params
->dwell
[band
].active
=
256 iwl_mvm_get_active_dwell(mvm
, band
, params
->n_ssids
);
260 "scan parameters: max_out_time %d, suspend_time %d, passive_fragmented %d\n",
261 params
->max_out_time
, params
->suspend_time
,
262 params
->passive_fragmented
);
264 "dwell[IEEE80211_BAND_2GHZ]: passive %d, active %d, fragmented %d\n",
265 params
->dwell
[IEEE80211_BAND_2GHZ
].passive
,
266 params
->dwell
[IEEE80211_BAND_2GHZ
].active
,
267 params
->dwell
[IEEE80211_BAND_2GHZ
].fragmented
);
269 "dwell[IEEE80211_BAND_5GHZ]: passive %d, active %d, fragmented %d\n",
270 params
->dwell
[IEEE80211_BAND_5GHZ
].passive
,
271 params
->dwell
[IEEE80211_BAND_5GHZ
].active
,
272 params
->dwell
[IEEE80211_BAND_5GHZ
].fragmented
);
275 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm
*mvm
)
277 /* require rrm scan whenever the fw supports it */
278 return fw_has_capa(&mvm
->fw
->ucode_capa
,
279 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT
);
282 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm
*mvm
)
286 max_probe_len
= SCAN_OFFLOAD_PROBE_REQ_SIZE
;
288 /* we create the 802.11 header and SSID element */
289 max_probe_len
-= 24 + 2;
291 /* DS parameter set element is added on 2.4GHZ band if required */
292 if (iwl_mvm_rrm_scan_needed(mvm
))
295 return max_probe_len
;
298 int iwl_mvm_max_scan_ie_len(struct iwl_mvm
*mvm
)
300 int max_ie_len
= iwl_mvm_max_scan_ie_fw_cmd_room(mvm
);
302 /* TODO: [BUG] This function should return the maximum allowed size of
303 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
304 * in the same command. So the correct implementation of this function
305 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
306 * command has only 512 bytes and it would leave us with about 240
307 * bytes for scan IEs, which is clearly not enough. So meanwhile
308 * we will report an incorrect value. This may result in a failure to
309 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
310 * functions with -ENOBUFS, if a large enough probe will be provided.
315 static u8
*iwl_mvm_dump_channel_list(struct iwl_scan_results_notif
*res
,
316 int num_res
, u8
*buf
, size_t buf_size
)
319 u8
*pos
= buf
, *end
= buf
+ buf_size
;
321 for (i
= 0; pos
< end
&& i
< num_res
; i
++)
322 pos
+= snprintf(pos
, end
- pos
, " %u", res
[i
].channel
);
324 /* terminate the string in case the buffer was too short */
325 *(buf
+ buf_size
- 1) = '\0';
330 int iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm
*mvm
,
331 struct iwl_rx_cmd_buffer
*rxb
,
332 struct iwl_device_cmd
*cmd
)
334 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
335 struct iwl_lmac_scan_complete_notif
*notif
= (void *)pkt
->data
;
339 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
340 notif
->status
, notif
->scanned_channels
,
341 iwl_mvm_dump_channel_list(notif
->results
,
342 notif
->scanned_channels
, buf
,
347 int iwl_mvm_rx_scan_match_found(struct iwl_mvm
*mvm
,
348 struct iwl_rx_cmd_buffer
*rxb
,
349 struct iwl_device_cmd
*cmd
)
351 IWL_DEBUG_SCAN(mvm
, "Scheduled scan results\n");
352 ieee80211_sched_scan_results(mvm
->hw
);
357 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status
)
360 case IWL_SCAN_EBS_SUCCESS
:
362 case IWL_SCAN_EBS_INACTIVE
:
364 case IWL_SCAN_EBS_FAILED
:
365 case IWL_SCAN_EBS_CHAN_NOT_FOUND
:
371 int iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm
*mvm
,
372 struct iwl_rx_cmd_buffer
*rxb
,
373 struct iwl_device_cmd
*cmd
)
375 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
376 struct iwl_periodic_scan_complete
*scan_notif
= (void *)pkt
->data
;
377 bool aborted
= (scan_notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
379 /* scan status must be locked for proper checking */
380 lockdep_assert_held(&mvm
->mutex
);
382 /* We first check if we were stopping a scan, in which case we
383 * just clear the stopping flag. Then we check if it was a
384 * firmware initiated stop, in which case we need to inform
386 * Note that we can have a stopping and a running scan
387 * simultaneously, but we can't have two different types of
388 * scans stopping or running at the same time (since LMAC
389 * doesn't support it).
392 if (mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_SCHED
) {
393 WARN_ON_ONCE(mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_REGULAR
);
395 IWL_DEBUG_SCAN(mvm
, "Scheduled scan %s, EBS status %s\n",
396 aborted
? "aborted" : "completed",
397 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
399 mvm
->scan_status
&= ~IWL_MVM_SCAN_STOPPING_SCHED
;
400 } else if (mvm
->scan_status
& IWL_MVM_SCAN_STOPPING_REGULAR
) {
401 IWL_DEBUG_SCAN(mvm
, "Regular scan %s, EBS status %s\n",
402 aborted
? "aborted" : "completed",
403 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
405 mvm
->scan_status
&= ~IWL_MVM_SCAN_STOPPING_REGULAR
;
406 } else if (mvm
->scan_status
& IWL_MVM_SCAN_SCHED
) {
407 WARN_ON_ONCE(mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
);
409 IWL_DEBUG_SCAN(mvm
, "Scheduled scan %s, EBS status %s (FW)\n",
410 aborted
? "aborted" : "completed",
411 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
413 mvm
->scan_status
&= ~IWL_MVM_SCAN_SCHED
;
414 ieee80211_sched_scan_stopped(mvm
->hw
);
415 } else if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
) {
416 IWL_DEBUG_SCAN(mvm
, "Regular scan %s, EBS status %s (FW)\n",
417 aborted
? "aborted" : "completed",
418 iwl_mvm_ebs_status_str(scan_notif
->ebs_status
));
420 mvm
->scan_status
&= ~IWL_MVM_SCAN_REGULAR
;
421 ieee80211_scan_completed(mvm
->hw
,
422 scan_notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
423 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
426 mvm
->last_ebs_successful
=
427 scan_notif
->ebs_status
== IWL_SCAN_EBS_SUCCESS
||
428 scan_notif
->ebs_status
== IWL_SCAN_EBS_INACTIVE
;
433 static int iwl_ssid_exist(u8
*ssid
, u8 ssid_len
, struct iwl_ssid_ie
*ssid_list
)
437 for (i
= 0; i
< PROBE_OPTION_MAX
; i
++) {
438 if (!ssid_list
[i
].len
)
440 if (ssid_list
[i
].len
== ssid_len
&&
441 !memcmp(ssid_list
->ssid
, ssid
, ssid_len
))
447 /* We insert the SSIDs in an inverted order, because the FW will
450 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params
*params
,
451 struct iwl_ssid_ie
*ssids
,
458 * copy SSIDs from match list.
459 * iwl_config_sched_scan_profiles() uses the order of these ssids to
462 for (i
= 0, j
= params
->n_match_sets
- 1;
463 j
>= 0 && i
< PROBE_OPTION_MAX
;
465 /* skip empty SSID matchsets */
466 if (!params
->match_sets
[j
].ssid
.ssid_len
)
468 ssids
[i
].id
= WLAN_EID_SSID
;
469 ssids
[i
].len
= params
->match_sets
[j
].ssid
.ssid_len
;
470 memcpy(ssids
[i
].ssid
, params
->match_sets
[j
].ssid
.ssid
,
474 /* add SSIDs from scan SSID list */
476 for (j
= params
->n_ssids
- 1;
477 j
>= 0 && i
< PROBE_OPTION_MAX
;
479 index
= iwl_ssid_exist(params
->ssids
[j
].ssid
,
480 params
->ssids
[j
].ssid_len
,
483 ssids
[i
].id
= WLAN_EID_SSID
;
484 ssids
[i
].len
= params
->ssids
[j
].ssid_len
;
485 memcpy(ssids
[i
].ssid
, params
->ssids
[j
].ssid
,
487 *ssid_bitmap
|= BIT(i
);
489 *ssid_bitmap
|= BIT(index
);
495 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm
*mvm
,
496 struct cfg80211_sched_scan_request
*req
)
498 struct iwl_scan_offload_profile
*profile
;
499 struct iwl_scan_offload_profile_cfg
*profile_cfg
;
500 struct iwl_scan_offload_blacklist
*blacklist
;
501 struct iwl_host_cmd cmd
= {
502 .id
= SCAN_OFFLOAD_UPDATE_PROFILES_CMD
,
503 .len
[1] = sizeof(*profile_cfg
),
504 .dataflags
[0] = IWL_HCMD_DFL_NOCOPY
,
505 .dataflags
[1] = IWL_HCMD_DFL_NOCOPY
,
511 if (WARN_ON(req
->n_match_sets
> IWL_SCAN_MAX_PROFILES
))
514 if (mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_SHORT_BL
)
515 blacklist_len
= IWL_SCAN_SHORT_BLACKLIST_LEN
;
517 blacklist_len
= IWL_SCAN_MAX_BLACKLIST_LEN
;
519 blacklist
= kzalloc(sizeof(*blacklist
) * blacklist_len
, GFP_KERNEL
);
523 profile_cfg
= kzalloc(sizeof(*profile_cfg
), GFP_KERNEL
);
529 cmd
.data
[0] = blacklist
;
530 cmd
.len
[0] = sizeof(*blacklist
) * blacklist_len
;
531 cmd
.data
[1] = profile_cfg
;
533 /* No blacklist configuration */
535 profile_cfg
->num_profiles
= req
->n_match_sets
;
536 profile_cfg
->active_clients
= SCAN_CLIENT_SCHED_SCAN
;
537 profile_cfg
->pass_match
= SCAN_CLIENT_SCHED_SCAN
;
538 profile_cfg
->match_notify
= SCAN_CLIENT_SCHED_SCAN
;
539 if (!req
->n_match_sets
|| !req
->match_sets
[0].ssid
.ssid_len
)
540 profile_cfg
->any_beacon_notify
= SCAN_CLIENT_SCHED_SCAN
;
542 for (i
= 0; i
< req
->n_match_sets
; i
++) {
543 profile
= &profile_cfg
->profiles
[i
];
544 profile
->ssid_index
= i
;
545 /* Support any cipher and auth algorithm */
546 profile
->unicast_cipher
= 0xff;
547 profile
->auth_alg
= 0xff;
548 profile
->network_type
= IWL_NETWORK_TYPE_ANY
;
549 profile
->band_selection
= IWL_SCAN_OFFLOAD_SELECT_ANY
;
550 profile
->client_bitmap
= SCAN_CLIENT_SCHED_SCAN
;
553 IWL_DEBUG_SCAN(mvm
, "Sending scheduled scan profile config\n");
555 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
563 static bool iwl_mvm_scan_pass_all(struct iwl_mvm
*mvm
,
564 struct cfg80211_sched_scan_request
*req
)
566 if (req
->n_match_sets
&& req
->match_sets
[0].ssid
.ssid_len
) {
568 "Sending scheduled scan with filtering, n_match_sets %d\n",
573 IWL_DEBUG_SCAN(mvm
, "Sending Scheduled scan without filtering\n");
577 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm
*mvm
)
580 struct iwl_host_cmd cmd
= {
581 .id
= SCAN_OFFLOAD_ABORT_CMD
,
585 ret
= iwl_mvm_send_cmd_status(mvm
, &cmd
, &status
);
589 if (status
!= CAN_ABORT_STATUS
) {
591 * The scan abort will return 1 for success or
592 * 2 for "failure". A failure condition can be
593 * due to simply not being in an active scan which
594 * can occur if we send the scan abort before the
595 * microcode has notified us that a scan is completed.
597 IWL_DEBUG_SCAN(mvm
, "SCAN OFFLOAD ABORT ret %d.\n", status
);
604 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm
*mvm
,
605 struct iwl_scan_req_tx_cmd
*tx_cmd
,
608 tx_cmd
[0].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
610 tx_cmd
[0].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
613 tx_cmd
[0].sta_id
= mvm
->aux_sta
.sta_id
;
615 tx_cmd
[1].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
617 tx_cmd
[1].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
620 tx_cmd
[1].sta_id
= mvm
->aux_sta
.sta_id
;
624 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm
*mvm
,
625 struct ieee80211_channel
**channels
,
626 int n_channels
, u32 ssid_bitmap
,
627 struct iwl_scan_req_lmac
*cmd
)
629 struct iwl_scan_channel_cfg_lmac
*channel_cfg
= (void *)&cmd
->data
;
632 for (i
= 0; i
< n_channels
; i
++) {
633 channel_cfg
[i
].channel_num
=
634 cpu_to_le16(channels
[i
]->hw_value
);
635 channel_cfg
[i
].iter_count
= cpu_to_le16(1);
636 channel_cfg
[i
].iter_interval
= 0;
637 channel_cfg
[i
].flags
=
638 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL
|
643 static u8
*iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm
*mvm
, const u8
*ies
,
644 size_t len
, u8
*const pos
)
646 static const u8 before_ds_params
[] = {
650 WLAN_EID_EXT_SUPP_RATES
,
655 if (!iwl_mvm_rrm_scan_needed(mvm
)) {
656 memcpy(newpos
, ies
, len
);
660 offs
= ieee80211_ie_split(ies
, len
,
662 ARRAY_SIZE(before_ds_params
),
665 memcpy(newpos
, ies
, offs
);
668 /* Add a placeholder for DS Parameter Set element */
669 *newpos
++ = WLAN_EID_DS_PARAMS
;
673 memcpy(newpos
, ies
+ offs
, len
- offs
);
674 newpos
+= len
- offs
;
680 iwl_mvm_build_scan_probe(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
681 struct ieee80211_scan_ies
*ies
,
682 struct iwl_mvm_scan_params
*params
)
684 struct ieee80211_mgmt
*frame
= (void *)params
->preq
.buf
;
686 const u8
*mac_addr
= params
->flags
& NL80211_SCAN_FLAG_RANDOM_ADDR
?
687 params
->mac_addr
: NULL
;
690 * Unfortunately, right now the offload scan doesn't support randomising
691 * within the firmware, so until the firmware API is ready we implement
692 * it in the driver. This means that the scan iterations won't really be
693 * random, only when it's restarted, but at least that helps a bit.
696 get_random_mask_addr(frame
->sa
, mac_addr
,
697 params
->mac_addr_mask
);
699 memcpy(frame
->sa
, vif
->addr
, ETH_ALEN
);
701 frame
->frame_control
= cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
);
702 eth_broadcast_addr(frame
->da
);
703 eth_broadcast_addr(frame
->bssid
);
706 pos
= frame
->u
.probe_req
.variable
;
707 *pos
++ = WLAN_EID_SSID
;
710 params
->preq
.mac_header
.offset
= 0;
711 params
->preq
.mac_header
.len
= cpu_to_le16(24 + 2);
713 /* Insert ds parameter set element on 2.4 GHz band */
714 newpos
= iwl_mvm_copy_and_insert_ds_elem(mvm
,
715 ies
->ies
[IEEE80211_BAND_2GHZ
],
716 ies
->len
[IEEE80211_BAND_2GHZ
],
718 params
->preq
.band_data
[0].offset
= cpu_to_le16(pos
- params
->preq
.buf
);
719 params
->preq
.band_data
[0].len
= cpu_to_le16(newpos
- pos
);
722 memcpy(pos
, ies
->ies
[IEEE80211_BAND_5GHZ
],
723 ies
->len
[IEEE80211_BAND_5GHZ
]);
724 params
->preq
.band_data
[1].offset
= cpu_to_le16(pos
- params
->preq
.buf
);
725 params
->preq
.band_data
[1].len
=
726 cpu_to_le16(ies
->len
[IEEE80211_BAND_5GHZ
]);
727 pos
+= ies
->len
[IEEE80211_BAND_5GHZ
];
729 memcpy(pos
, ies
->common_ies
, ies
->common_ie_len
);
730 params
->preq
.common_data
.offset
= cpu_to_le16(pos
- params
->preq
.buf
);
731 params
->preq
.common_data
.len
= cpu_to_le16(ies
->common_ie_len
);
734 static __le32
iwl_mvm_scan_priority(struct iwl_mvm
*mvm
,
735 enum iwl_scan_priority_ext prio
)
737 if (fw_has_api(&mvm
->fw
->ucode_capa
,
738 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY
))
739 return cpu_to_le32(prio
);
741 if (prio
<= IWL_SCAN_PRIORITY_EXT_2
)
742 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW
);
744 if (prio
<= IWL_SCAN_PRIORITY_EXT_4
)
745 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM
);
747 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH
);
750 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm
*mvm
,
751 struct iwl_scan_req_lmac
*cmd
,
752 struct iwl_mvm_scan_params
*params
)
754 cmd
->active_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].active
;
755 cmd
->passive_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].passive
;
756 if (params
->passive_fragmented
)
757 cmd
->fragmented_dwell
=
758 params
->dwell
[IEEE80211_BAND_2GHZ
].fragmented
;
759 cmd
->max_out_time
= cpu_to_le32(params
->max_out_time
);
760 cmd
->suspend_time
= cpu_to_le32(params
->suspend_time
);
761 cmd
->scan_prio
= iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_6
);
764 static inline bool iwl_mvm_scan_fits(struct iwl_mvm
*mvm
, int n_ssids
,
765 struct ieee80211_scan_ies
*ies
,
768 return ((n_ssids
<= PROBE_OPTION_MAX
) &&
769 (n_channels
<= mvm
->fw
->ucode_capa
.n_scan_channels
) &
770 (ies
->common_ie_len
+
771 ies
->len
[NL80211_BAND_2GHZ
] +
772 ies
->len
[NL80211_BAND_5GHZ
] <=
773 iwl_mvm_max_scan_ie_fw_cmd_room(mvm
)));
776 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm
*mvm
,
777 struct ieee80211_vif
*vif
,
780 const struct iwl_ucode_capabilities
*capa
= &mvm
->fw
->ucode_capa
;
782 /* We can only use EBS if:
783 * 1. the feature is supported;
784 * 2. the last EBS was successful;
785 * 3. if only single scan, the single scan EBS API is supported;
786 * 4. it's not a p2p find operation.
788 return ((capa
->flags
& IWL_UCODE_TLV_FLAGS_EBS_SUPPORT
) &&
789 mvm
->last_ebs_successful
&&
791 fw_has_api(capa
, IWL_UCODE_TLV_API_SINGLE_SCAN_EBS
)) &&
792 vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
);
795 static int iwl_mvm_scan_total_iterations(struct iwl_mvm_scan_params
*params
)
797 return params
->schedule
[0].iterations
+ params
->schedule
[1].iterations
;
800 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm
*mvm
,
801 struct iwl_mvm_scan_params
*params
)
805 if (params
->n_ssids
== 0)
806 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE
;
808 if (params
->n_ssids
== 1 && params
->ssids
[0].ssid_len
!= 0)
809 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION
;
811 if (params
->passive_fragmented
)
812 flags
|= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED
;
814 if (iwl_mvm_rrm_scan_needed(mvm
))
815 flags
|= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED
;
817 if (params
->pass_all
)
818 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL
;
820 flags
|= IWL_MVM_LMAC_SCAN_FLAG_MATCH
;
822 #ifdef CONFIG_IWLWIFI_DEBUGFS
823 if (mvm
->scan_iter_notif_enabled
)
824 flags
|= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE
;
830 static int iwl_mvm_scan_lmac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
831 struct iwl_mvm_scan_params
*params
)
833 struct iwl_scan_req_lmac
*cmd
= mvm
->scan_cmd
;
834 struct iwl_scan_probe_req
*preq
=
835 (void *)(cmd
->data
+ sizeof(struct iwl_scan_channel_cfg_lmac
) *
836 mvm
->fw
->ucode_capa
.n_scan_channels
);
838 int n_iterations
= iwl_mvm_scan_total_iterations(params
);
840 lockdep_assert_held(&mvm
->mutex
);
842 memset(cmd
, 0, ksize(cmd
));
844 iwl_mvm_scan_lmac_dwell(mvm
, cmd
, params
);
846 cmd
->rx_chain_select
= iwl_mvm_scan_rx_chain(mvm
);
847 cmd
->iter_num
= cpu_to_le32(1);
848 cmd
->n_channels
= (u8
)params
->n_channels
;
850 cmd
->delay
= cpu_to_le32(params
->delay
);
852 cmd
->scan_flags
= cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm
, params
));
854 cmd
->flags
= iwl_mvm_scan_rxon_flags(params
->channels
[0]->band
);
855 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
|
856 MAC_FILTER_IN_BEACON
);
857 iwl_mvm_scan_fill_tx_cmd(mvm
, cmd
->tx_cmd
, params
->no_cck
);
858 iwl_scan_build_ssids(params
, cmd
->direct_scan
, &ssid_bitmap
);
860 /* this API uses bits 1-20 instead of 0-19 */
863 cmd
->schedule
[0].delay
= cpu_to_le16(params
->interval
);
864 cmd
->schedule
[0].iterations
= params
->schedule
[0].iterations
;
865 cmd
->schedule
[0].full_scan_mul
= params
->schedule
[0].full_scan_mul
;
866 cmd
->schedule
[1].delay
= cpu_to_le16(params
->interval
);
867 cmd
->schedule
[1].iterations
= params
->schedule
[1].iterations
;
868 cmd
->schedule
[1].full_scan_mul
= params
->schedule
[1].iterations
;
870 if (iwl_mvm_scan_use_ebs(mvm
, vif
, n_iterations
)) {
871 cmd
->channel_opt
[0].flags
=
872 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
873 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
874 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
875 cmd
->channel_opt
[0].non_ebs_ratio
=
876 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO
);
877 cmd
->channel_opt
[1].flags
=
878 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
879 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
880 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
881 cmd
->channel_opt
[1].non_ebs_ratio
=
882 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO
);
885 iwl_mvm_lmac_scan_cfg_channels(mvm
, params
->channels
,
886 params
->n_channels
, ssid_bitmap
, cmd
);
888 *preq
= params
->preq
;
893 static int rate_to_scan_rate_flag(unsigned int rate
)
895 static const int rate_to_scan_rate
[IWL_RATE_COUNT
] = {
896 [IWL_RATE_1M_INDEX
] = SCAN_CONFIG_RATE_1M
,
897 [IWL_RATE_2M_INDEX
] = SCAN_CONFIG_RATE_2M
,
898 [IWL_RATE_5M_INDEX
] = SCAN_CONFIG_RATE_5M
,
899 [IWL_RATE_11M_INDEX
] = SCAN_CONFIG_RATE_11M
,
900 [IWL_RATE_6M_INDEX
] = SCAN_CONFIG_RATE_6M
,
901 [IWL_RATE_9M_INDEX
] = SCAN_CONFIG_RATE_9M
,
902 [IWL_RATE_12M_INDEX
] = SCAN_CONFIG_RATE_12M
,
903 [IWL_RATE_18M_INDEX
] = SCAN_CONFIG_RATE_18M
,
904 [IWL_RATE_24M_INDEX
] = SCAN_CONFIG_RATE_24M
,
905 [IWL_RATE_36M_INDEX
] = SCAN_CONFIG_RATE_36M
,
906 [IWL_RATE_48M_INDEX
] = SCAN_CONFIG_RATE_48M
,
907 [IWL_RATE_54M_INDEX
] = SCAN_CONFIG_RATE_54M
,
910 return rate_to_scan_rate
[rate
];
913 static __le32
iwl_mvm_scan_config_rates(struct iwl_mvm
*mvm
)
915 struct ieee80211_supported_band
*band
;
916 unsigned int rates
= 0;
919 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
];
920 for (i
= 0; i
< band
->n_bitrates
; i
++)
921 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
922 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
];
923 for (i
= 0; i
< band
->n_bitrates
; i
++)
924 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
926 /* Set both basic rates and supported rates */
927 rates
|= SCAN_CONFIG_SUPPORTED_RATE(rates
);
929 return cpu_to_le32(rates
);
932 int iwl_mvm_config_scan(struct iwl_mvm
*mvm
)
935 struct iwl_scan_config
*scan_config
;
936 struct ieee80211_supported_band
*band
;
938 mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
].n_channels
+
939 mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
].n_channels
;
940 int ret
, i
, j
= 0, cmd_size
, data_size
;
941 struct iwl_host_cmd cmd
= {
945 if (WARN_ON(num_channels
> mvm
->fw
->ucode_capa
.n_scan_channels
))
948 cmd_size
= sizeof(*scan_config
) + mvm
->fw
->ucode_capa
.n_scan_channels
;
950 scan_config
= kzalloc(cmd_size
, GFP_KERNEL
);
954 data_size
= cmd_size
- sizeof(struct iwl_mvm_umac_cmd_hdr
);
955 scan_config
->hdr
.size
= cpu_to_le16(data_size
);
956 scan_config
->flags
= cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE
|
957 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS
|
958 SCAN_CONFIG_FLAG_SET_TX_CHAINS
|
959 SCAN_CONFIG_FLAG_SET_RX_CHAINS
|
960 SCAN_CONFIG_FLAG_SET_ALL_TIMES
|
961 SCAN_CONFIG_FLAG_SET_LEGACY_RATES
|
962 SCAN_CONFIG_FLAG_SET_MAC_ADDR
|
963 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS
|
964 SCAN_CONFIG_N_CHANNELS(num_channels
));
965 scan_config
->tx_chains
= cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm
));
966 scan_config
->rx_chains
= cpu_to_le32(iwl_mvm_scan_rx_ant(mvm
));
967 scan_config
->legacy_rates
= iwl_mvm_scan_config_rates(mvm
);
968 scan_config
->out_of_channel_time
= cpu_to_le32(170);
969 scan_config
->suspend_time
= cpu_to_le32(30);
970 scan_config
->dwell_active
= 20;
971 scan_config
->dwell_passive
= 110;
972 scan_config
->dwell_fragmented
= 20;
974 memcpy(&scan_config
->mac_addr
, &mvm
->addresses
[0].addr
, ETH_ALEN
);
976 scan_config
->bcast_sta_id
= mvm
->aux_sta
.sta_id
;
977 scan_config
->channel_flags
= IWL_CHANNEL_FLAG_EBS
|
978 IWL_CHANNEL_FLAG_ACCURATE_EBS
|
979 IWL_CHANNEL_FLAG_EBS_ADD
|
980 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE
;
982 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
];
983 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
984 scan_config
->channel_array
[j
] = band
->channels
[i
].hw_value
;
985 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
];
986 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
987 scan_config
->channel_array
[j
] = band
->channels
[i
].hw_value
;
989 cmd
.data
[0] = scan_config
;
990 cmd
.len
[0] = cmd_size
;
991 cmd
.dataflags
[0] = IWL_HCMD_DFL_NOCOPY
;
993 IWL_DEBUG_SCAN(mvm
, "Sending UMAC scan config\n");
995 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
1001 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm
*mvm
, int status
)
1005 for (i
= 0; i
< mvm
->max_scans
; i
++)
1006 if (mvm
->scan_uid_status
[i
] == status
)
1012 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm
*mvm
,
1013 struct iwl_scan_req_umac
*cmd
,
1014 struct iwl_mvm_scan_params
*params
)
1016 cmd
->active_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].active
;
1017 cmd
->passive_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].passive
;
1018 if (params
->passive_fragmented
)
1019 cmd
->fragmented_dwell
=
1020 params
->dwell
[IEEE80211_BAND_2GHZ
].fragmented
;
1021 cmd
->max_out_time
= cpu_to_le32(params
->max_out_time
);
1022 cmd
->suspend_time
= cpu_to_le32(params
->suspend_time
);
1023 cmd
->scan_priority
=
1024 iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_6
);
1026 if (iwl_mvm_scan_total_iterations(params
) == 1)
1028 iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_6
);
1031 iwl_mvm_scan_priority(mvm
, IWL_SCAN_PRIORITY_EXT_2
);
1035 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm
*mvm
,
1036 struct ieee80211_channel
**channels
,
1037 int n_channels
, u32 ssid_bitmap
,
1038 struct iwl_scan_req_umac
*cmd
)
1040 struct iwl_scan_channel_cfg_umac
*channel_cfg
= (void *)&cmd
->data
;
1043 for (i
= 0; i
< n_channels
; i
++) {
1044 channel_cfg
[i
].flags
= cpu_to_le32(ssid_bitmap
);
1045 channel_cfg
[i
].channel_num
= channels
[i
]->hw_value
;
1046 channel_cfg
[i
].iter_count
= 1;
1047 channel_cfg
[i
].iter_interval
= 0;
1051 static u32
iwl_mvm_scan_umac_flags(struct iwl_mvm
*mvm
,
1052 struct iwl_mvm_scan_params
*params
)
1056 if (params
->n_ssids
== 0)
1057 flags
= IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE
;
1059 if (params
->n_ssids
== 1 && params
->ssids
[0].ssid_len
!= 0)
1060 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT
;
1062 if (params
->passive_fragmented
)
1063 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED
;
1065 if (iwl_mvm_rrm_scan_needed(mvm
))
1066 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED
;
1068 if (params
->pass_all
)
1069 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL
;
1071 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_MATCH
;
1073 if (iwl_mvm_scan_total_iterations(params
) > 1)
1074 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC
;
1076 #ifdef CONFIG_IWLWIFI_DEBUGFS
1077 if (mvm
->scan_iter_notif_enabled
)
1078 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE
;
1083 static int iwl_mvm_scan_umac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1084 struct iwl_mvm_scan_params
*params
,
1087 struct iwl_scan_req_umac
*cmd
= mvm
->scan_cmd
;
1088 struct iwl_scan_req_umac_tail
*sec_part
= (void *)&cmd
->data
+
1089 sizeof(struct iwl_scan_channel_cfg_umac
) *
1090 mvm
->fw
->ucode_capa
.n_scan_channels
;
1092 u32 ssid_bitmap
= 0;
1093 int n_iterations
= iwl_mvm_scan_total_iterations(params
);
1095 lockdep_assert_held(&mvm
->mutex
);
1097 uid
= iwl_mvm_scan_uid_by_status(mvm
, 0);
1101 memset(cmd
, 0, ksize(cmd
));
1102 cmd
->hdr
.size
= cpu_to_le16(iwl_mvm_scan_size(mvm
) -
1103 sizeof(struct iwl_mvm_umac_cmd_hdr
));
1105 iwl_mvm_scan_umac_dwell(mvm
, cmd
, params
);
1107 mvm
->scan_uid_status
[uid
] = type
;
1109 cmd
->uid
= cpu_to_le32(uid
);
1110 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
, n_iterations
))
1116 cmd
->channel_flags
= IWL_SCAN_CHANNEL_FLAG_EBS
|
1117 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
1118 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
;
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 /* With UMAC we use only one schedule for now, so use the sum
1128 * of the iterations (with a a maximum of 255).
1130 sec_part
->schedule
[0].iter_count
=
1131 (n_iterations
> 255) ? 255 : n_iterations
;
1132 sec_part
->schedule
[0].interval
= cpu_to_le16(params
->interval
);
1134 sec_part
->delay
= cpu_to_le16(params
->delay
);
1135 sec_part
->preq
= params
->preq
;
1140 static int iwl_mvm_num_scans(struct iwl_mvm
*mvm
)
1142 return hweight32(mvm
->scan_status
& IWL_MVM_SCAN_MASK
);
1145 static int iwl_mvm_check_running_scans(struct iwl_mvm
*mvm
, int type
)
1147 /* This looks a bit arbitrary, but the idea is that if we run
1148 * out of possible simultaneous scans and the userspace is
1149 * trying to run a scan type that is already running, we
1150 * return -EBUSY. But if the userspace wants to start a
1151 * different type of scan, we stop the opposite type to make
1152 * space for the new request. The reason is backwards
1153 * compatibility with old wpa_supplicant that wouldn't stop a
1154 * scheduled scan before starting a normal scan.
1157 if (iwl_mvm_num_scans(mvm
) < mvm
->max_scans
)
1160 /* Use a switch, even though this is a bitmask, so that more
1161 * than one bits set will fall in default and we will warn.
1164 case IWL_MVM_SCAN_REGULAR
:
1165 if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR_MASK
)
1167 return iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_SCHED
, true);
1168 case IWL_MVM_SCAN_SCHED
:
1169 if (mvm
->scan_status
& IWL_MVM_SCAN_SCHED_MASK
)
1171 iwl_mvm_scan_stop(mvm
, IWL_MVM_SCAN_REGULAR
, true);
1172 case IWL_MVM_SCAN_NETDETECT
:
1173 /* No need to stop anything for net-detect since the
1174 * firmware is restarted anyway. This way, any sched
1175 * scans that were running will be restarted when we
1187 int iwl_mvm_reg_scan_start(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1188 struct cfg80211_scan_request
*req
,
1189 struct ieee80211_scan_ies
*ies
)
1191 struct iwl_host_cmd hcmd
= {
1192 .len
= { iwl_mvm_scan_size(mvm
), },
1193 .data
= { mvm
->scan_cmd
, },
1194 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1196 struct iwl_mvm_scan_params params
= {};
1199 lockdep_assert_held(&mvm
->mutex
);
1201 if (iwl_mvm_is_lar_supported(mvm
) && !mvm
->lar_regdom_set
) {
1202 IWL_ERR(mvm
, "scan while LAR regdomain is not set\n");
1206 ret
= iwl_mvm_check_running_scans(mvm
, IWL_MVM_SCAN_REGULAR
);
1210 iwl_mvm_ref(mvm
, IWL_MVM_REF_SCAN
);
1212 /* we should have failed registration if scan_cmd was NULL */
1213 if (WARN_ON(!mvm
->scan_cmd
))
1216 if (!iwl_mvm_scan_fits(mvm
, req
->n_ssids
, ies
, req
->n_channels
))
1219 params
.n_ssids
= req
->n_ssids
;
1220 params
.flags
= req
->flags
;
1221 params
.n_channels
= req
->n_channels
;
1223 params
.interval
= 0;
1224 params
.ssids
= req
->ssids
;
1225 params
.channels
= req
->channels
;
1226 params
.mac_addr
= req
->mac_addr
;
1227 params
.mac_addr_mask
= req
->mac_addr_mask
;
1228 params
.no_cck
= req
->no_cck
;
1229 params
.pass_all
= true;
1230 params
.n_match_sets
= 0;
1231 params
.match_sets
= NULL
;
1233 params
.schedule
[0].iterations
= 1;
1234 params
.schedule
[0].full_scan_mul
= 0;
1235 params
.schedule
[1].iterations
= 0;
1236 params
.schedule
[1].full_scan_mul
= 0;
1238 iwl_mvm_scan_calc_dwell(mvm
, vif
, ¶ms
);
1240 iwl_mvm_build_scan_probe(mvm
, vif
, ies
, ¶ms
);
1242 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1243 hcmd
.id
= SCAN_REQ_UMAC
;
1244 ret
= iwl_mvm_scan_umac(mvm
, vif
, ¶ms
,
1245 IWL_MVM_SCAN_REGULAR
);
1247 hcmd
.id
= SCAN_OFFLOAD_REQUEST_CMD
;
1248 ret
= iwl_mvm_scan_lmac(mvm
, vif
, ¶ms
);
1254 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1256 IWL_DEBUG_SCAN(mvm
, "Scan request was sent successfully\n");
1257 mvm
->scan_status
|= IWL_MVM_SCAN_REGULAR
;
1259 /* If the scan failed, it usually means that the FW was unable
1260 * to allocate the time events. Warn on it, but maybe we
1261 * should try to send the command again with different params.
1263 IWL_ERR(mvm
, "Scan failed! ret %d\n", ret
);
1267 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1272 int iwl_mvm_sched_scan_start(struct iwl_mvm
*mvm
,
1273 struct ieee80211_vif
*vif
,
1274 struct cfg80211_sched_scan_request
*req
,
1275 struct ieee80211_scan_ies
*ies
,
1278 struct iwl_host_cmd hcmd
= {
1279 .len
= { iwl_mvm_scan_size(mvm
), },
1280 .data
= { mvm
->scan_cmd
, },
1281 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1283 struct iwl_mvm_scan_params params
= {};
1286 lockdep_assert_held(&mvm
->mutex
);
1288 if (iwl_mvm_is_lar_supported(mvm
) && !mvm
->lar_regdom_set
) {
1289 IWL_ERR(mvm
, "sched-scan while LAR regdomain is not set\n");
1293 ret
= iwl_mvm_check_running_scans(mvm
, type
);
1297 /* we should have failed registration if scan_cmd was NULL */
1298 if (WARN_ON(!mvm
->scan_cmd
))
1301 if (!iwl_mvm_scan_fits(mvm
, req
->n_ssids
, ies
, req
->n_channels
))
1304 params
.n_ssids
= req
->n_ssids
;
1305 params
.flags
= req
->flags
;
1306 params
.n_channels
= req
->n_channels
;
1307 params
.ssids
= req
->ssids
;
1308 params
.channels
= req
->channels
;
1309 params
.mac_addr
= req
->mac_addr
;
1310 params
.mac_addr_mask
= req
->mac_addr_mask
;
1311 params
.no_cck
= false;
1312 params
.pass_all
= iwl_mvm_scan_pass_all(mvm
, req
);
1313 params
.n_match_sets
= req
->n_match_sets
;
1314 params
.match_sets
= req
->match_sets
;
1316 params
.schedule
[0].iterations
= IWL_FAST_SCHED_SCAN_ITERATIONS
;
1317 params
.schedule
[0].full_scan_mul
= 1;
1318 params
.schedule
[1].iterations
= 0xff;
1319 params
.schedule
[1].full_scan_mul
= IWL_FULL_SCAN_MULTIPLIER
;
1321 if (req
->interval
> U16_MAX
) {
1323 "interval value is > 16-bits, set to max possible\n");
1324 params
.interval
= U16_MAX
;
1326 params
.interval
= req
->interval
/ MSEC_PER_SEC
;
1329 /* In theory, LMAC scans can handle a 32-bit delay, but since
1330 * waiting for over 18 hours to start the scan is a bit silly
1331 * and to keep it aligned with UMAC scans (which only support
1332 * 16-bit delays), trim it down to 16-bits.
1334 if (req
->delay
> U16_MAX
) {
1336 "delay value is > 16-bits, set to max possible\n");
1337 params
.delay
= U16_MAX
;
1339 params
.delay
= req
->delay
;
1342 iwl_mvm_scan_calc_dwell(mvm
, vif
, ¶ms
);
1344 ret
= iwl_mvm_config_sched_scan_profiles(mvm
, req
);
1348 iwl_mvm_build_scan_probe(mvm
, vif
, ies
, ¶ms
);
1350 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1351 hcmd
.id
= SCAN_REQ_UMAC
;
1352 ret
= iwl_mvm_scan_umac(mvm
, vif
, ¶ms
, IWL_MVM_SCAN_SCHED
);
1354 hcmd
.id
= SCAN_OFFLOAD_REQUEST_CMD
;
1355 ret
= iwl_mvm_scan_lmac(mvm
, vif
, ¶ms
);
1361 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1364 "Sched scan request was sent successfully\n");
1365 mvm
->scan_status
|= type
;
1367 /* If the scan failed, it usually means that the FW was unable
1368 * to allocate the time events. Warn on it, but maybe we
1369 * should try to send the command again with different params.
1371 IWL_ERR(mvm
, "Sched scan failed! ret %d\n", ret
);
1377 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm
*mvm
,
1378 struct iwl_rx_cmd_buffer
*rxb
,
1379 struct iwl_device_cmd
*cmd
)
1381 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1382 struct iwl_umac_scan_complete
*notif
= (void *)pkt
->data
;
1383 u32 uid
= __le32_to_cpu(notif
->uid
);
1384 bool aborted
= (notif
->status
== IWL_SCAN_OFFLOAD_ABORTED
);
1386 if (WARN_ON(!(mvm
->scan_uid_status
[uid
] & mvm
->scan_status
)))
1389 /* if the scan is already stopping, we don't need to notify mac80211 */
1390 if (mvm
->scan_uid_status
[uid
] == IWL_MVM_SCAN_REGULAR
) {
1391 ieee80211_scan_completed(mvm
->hw
, aborted
);
1392 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1393 } else if (mvm
->scan_uid_status
[uid
] == IWL_MVM_SCAN_SCHED
) {
1394 ieee80211_sched_scan_stopped(mvm
->hw
);
1397 mvm
->scan_status
&= ~mvm
->scan_uid_status
[uid
];
1400 "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1401 uid
, mvm
->scan_uid_status
[uid
],
1402 notif
->status
== IWL_SCAN_OFFLOAD_COMPLETED
?
1403 "completed" : "aborted",
1404 iwl_mvm_ebs_status_str(notif
->ebs_status
));
1406 if (notif
->ebs_status
!= IWL_SCAN_EBS_SUCCESS
&&
1407 notif
->ebs_status
!= IWL_SCAN_EBS_INACTIVE
)
1408 mvm
->last_ebs_successful
= false;
1410 mvm
->scan_uid_status
[uid
] = 0;
1415 int iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm
*mvm
,
1416 struct iwl_rx_cmd_buffer
*rxb
,
1417 struct iwl_device_cmd
*cmd
)
1419 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1420 struct iwl_umac_scan_iter_complete_notif
*notif
= (void *)pkt
->data
;
1424 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1425 notif
->status
, notif
->scanned_channels
,
1426 iwl_mvm_dump_channel_list(notif
->results
,
1427 notif
->scanned_channels
, buf
,
1432 static int iwl_mvm_umac_scan_abort(struct iwl_mvm
*mvm
, int type
)
1434 struct iwl_umac_scan_abort cmd
= {
1435 .hdr
.size
= cpu_to_le16(sizeof(struct iwl_umac_scan_abort
) -
1436 sizeof(struct iwl_mvm_umac_cmd_hdr
)),
1440 lockdep_assert_held(&mvm
->mutex
);
1442 /* We should always get a valid index here, because we already
1443 * checked that this type of scan was running in the generic
1446 uid
= iwl_mvm_scan_uid_by_status(mvm
, type
);
1447 if (WARN_ON_ONCE(uid
< 0))
1450 cmd
.uid
= cpu_to_le32(uid
);
1452 IWL_DEBUG_SCAN(mvm
, "Sending scan abort, uid %u\n", uid
);
1454 ret
= iwl_mvm_send_cmd_pdu(mvm
, SCAN_ABORT_UMAC
, 0, sizeof(cmd
), &cmd
);
1456 mvm
->scan_uid_status
[uid
] = type
<< IWL_MVM_SCAN_STOPPING_SHIFT
;
1461 static int iwl_mvm_scan_stop_wait(struct iwl_mvm
*mvm
, int type
)
1463 struct iwl_notification_wait wait_scan_done
;
1464 static const u8 scan_done_notif
[] = { SCAN_COMPLETE_UMAC
,
1465 SCAN_OFFLOAD_COMPLETE
, };
1468 lockdep_assert_held(&mvm
->mutex
);
1470 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_scan_done
,
1472 ARRAY_SIZE(scan_done_notif
),
1475 IWL_DEBUG_SCAN(mvm
, "Preparing to stop scan, type %x\n", type
);
1477 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
))
1478 ret
= iwl_mvm_umac_scan_abort(mvm
, type
);
1480 ret
= iwl_mvm_lmac_scan_abort(mvm
);
1483 IWL_DEBUG_SCAN(mvm
, "couldn't stop scan type %d\n", type
);
1484 iwl_remove_notification(&mvm
->notif_wait
, &wait_scan_done
);
1488 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_scan_done
, 1 * HZ
);
1493 int iwl_mvm_scan_size(struct iwl_mvm
*mvm
)
1495 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
))
1496 return sizeof(struct iwl_scan_req_umac
) +
1497 sizeof(struct iwl_scan_channel_cfg_umac
) *
1498 mvm
->fw
->ucode_capa
.n_scan_channels
+
1499 sizeof(struct iwl_scan_req_umac_tail
);
1501 return sizeof(struct iwl_scan_req_lmac
) +
1502 sizeof(struct iwl_scan_channel_cfg_lmac
) *
1503 mvm
->fw
->ucode_capa
.n_scan_channels
+
1504 sizeof(struct iwl_scan_probe_req
);
1508 * This function is used in nic restart flow, to inform mac80211 about scans
1509 * that was aborted by restart flow or by an assert.
1511 void iwl_mvm_report_scan_aborted(struct iwl_mvm
*mvm
)
1513 if (fw_has_capa(&mvm
->fw
->ucode_capa
, IWL_UCODE_TLV_CAPA_UMAC_SCAN
)) {
1516 uid
= iwl_mvm_scan_uid_by_status(mvm
, IWL_MVM_SCAN_REGULAR
);
1518 ieee80211_scan_completed(mvm
->hw
, true);
1519 mvm
->scan_uid_status
[uid
] = 0;
1521 uid
= iwl_mvm_scan_uid_by_status(mvm
, IWL_MVM_SCAN_SCHED
);
1522 if (uid
>= 0 && !mvm
->restart_fw
) {
1523 ieee80211_sched_scan_stopped(mvm
->hw
);
1524 mvm
->scan_uid_status
[uid
] = 0;
1527 /* We shouldn't have any UIDs still set. Loop over all the
1528 * UIDs to make sure there's nothing left there and warn if
1531 for (i
= 0; i
< mvm
->max_scans
; i
++) {
1532 if (WARN_ONCE(mvm
->scan_uid_status
[i
],
1533 "UMAC scan UID %d status was not cleaned\n",
1535 mvm
->scan_uid_status
[i
] = 0;
1538 if (mvm
->scan_status
& IWL_MVM_SCAN_REGULAR
)
1539 ieee80211_scan_completed(mvm
->hw
, true);
1541 /* Sched scan will be restarted by mac80211 in
1542 * restart_hw, so do not report if FW is about to be
1545 if ((mvm
->scan_status
& IWL_MVM_SCAN_SCHED
) && !mvm
->restart_fw
)
1546 ieee80211_sched_scan_stopped(mvm
->hw
);
1550 int iwl_mvm_scan_stop(struct iwl_mvm
*mvm
, int type
, bool notify
)
1554 if (!(mvm
->scan_status
& type
))
1557 if (iwl_mvm_is_radio_killed(mvm
)) {
1562 ret
= iwl_mvm_scan_stop_wait(mvm
, type
);
1564 mvm
->scan_status
|= type
<< IWL_MVM_SCAN_STOPPING_SHIFT
;
1566 /* Clear the scan status so the next scan requests will
1567 * succeed and mark the scan as stopping, so that the Rx
1568 * handler doesn't do anything, as the scan was stopped from
1571 mvm
->scan_status
&= ~type
;
1573 if (type
== IWL_MVM_SCAN_REGULAR
) {
1574 /* Since the rx handler won't do anything now, we have
1575 * to release the scan reference here.
1577 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1579 ieee80211_scan_completed(mvm
->hw
, true);
1580 } else if (notify
) {
1581 ieee80211_sched_scan_stopped(mvm
->hw
);