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 - 2014 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 - 2014 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 "iwl-eeprom-parse.h"
71 #include "fw-api-scan.h"
73 #define IWL_PLCP_QUIET_THRESH 1
74 #define IWL_ACTIVE_QUIET_TIME 10
75 #define IWL_DENSE_EBS_SCAN_RATIO 5
76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
78 struct iwl_mvm_scan_params
{
81 bool passive_fragmented
;
85 } dwell
[IEEE80211_NUM_BANDS
];
88 enum iwl_umac_scan_uid_type
{
89 IWL_UMAC_SCAN_UID_REG_SCAN
= BIT(0),
90 IWL_UMAC_SCAN_UID_SCHED_SCAN
= BIT(1),
91 IWL_UMAC_SCAN_UID_ALL
= IWL_UMAC_SCAN_UID_REG_SCAN
|
92 IWL_UMAC_SCAN_UID_SCHED_SCAN
,
95 static int iwl_umac_scan_stop(struct iwl_mvm
*mvm
,
96 enum iwl_umac_scan_uid_type type
, bool notify
);
98 static u8
iwl_mvm_scan_rx_ant(struct iwl_mvm
*mvm
)
100 if (mvm
->scan_rx_ant
!= ANT_NONE
)
101 return mvm
->scan_rx_ant
;
102 return iwl_mvm_get_valid_rx_ant(mvm
);
105 static inline __le16
iwl_mvm_scan_rx_chain(struct iwl_mvm
*mvm
)
110 rx_ant
= iwl_mvm_scan_rx_ant(mvm
);
111 rx_chain
= rx_ant
<< PHY_RX_CHAIN_VALID_POS
;
112 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_MIMO_SEL_POS
;
113 rx_chain
|= rx_ant
<< PHY_RX_CHAIN_FORCE_SEL_POS
;
114 rx_chain
|= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS
;
115 return cpu_to_le16(rx_chain
);
118 static __le32
iwl_mvm_scan_rxon_flags(enum ieee80211_band band
)
120 if (band
== IEEE80211_BAND_2GHZ
)
121 return cpu_to_le32(PHY_BAND_24
);
123 return cpu_to_le32(PHY_BAND_5
);
127 iwl_mvm_scan_rate_n_flags(struct iwl_mvm
*mvm
, enum ieee80211_band band
,
132 mvm
->scan_last_antenna_idx
=
133 iwl_mvm_next_antenna(mvm
, iwl_mvm_get_valid_tx_ant(mvm
),
134 mvm
->scan_last_antenna_idx
);
135 tx_ant
= BIT(mvm
->scan_last_antenna_idx
) << RATE_MCS_ANT_POS
;
137 if (band
== IEEE80211_BAND_2GHZ
&& !no_cck
)
138 return cpu_to_le32(IWL_RATE_1M_PLCP
| RATE_MCS_CCK_MSK
|
141 return cpu_to_le32(IWL_RATE_6M_PLCP
| tx_ant
);
145 * We insert the SSIDs in an inverted order, because the FW will
146 * invert it back. The most prioritized SSID, which is first in the
147 * request list, is not copied here, but inserted directly to the probe
150 static void iwl_mvm_scan_fill_ssids(struct iwl_ssid_ie
*cmd_ssid
,
151 struct cfg80211_ssid
*ssids
,
152 int n_ssids
, int first
)
156 for (req_idx
= n_ssids
- 1, fw_idx
= 0; req_idx
>= first
;
157 req_idx
--, fw_idx
++) {
158 cmd_ssid
[fw_idx
].id
= WLAN_EID_SSID
;
159 cmd_ssid
[fw_idx
].len
= ssids
[req_idx
].ssid_len
;
160 memcpy(cmd_ssid
[fw_idx
].ssid
,
162 ssids
[req_idx
].ssid_len
);
167 * If req->n_ssids > 0, it means we should do an active scan.
168 * In case of active scan w/o directed scan, we receive a zero-length SSID
169 * just to notify that this scan is active and not passive.
170 * In order to notify the FW of the number of SSIDs we wish to scan (including
171 * the zero-length one), we need to set the corresponding bits in chan->type,
172 * one for each SSID, and set the active bit (first). If the first SSID is
173 * already included in the probe template, so we need to set only
174 * req->n_ssids - 1 bits in addition to the first bit.
176 static u16
iwl_mvm_get_active_dwell(struct iwl_mvm
*mvm
,
177 enum ieee80211_band band
, int n_ssids
)
179 if (mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_BASIC_DWELL
)
181 if (band
== IEEE80211_BAND_2GHZ
)
182 return 20 + 3 * (n_ssids
+ 1);
183 return 10 + 2 * (n_ssids
+ 1);
186 static u16
iwl_mvm_get_passive_dwell(struct iwl_mvm
*mvm
,
187 enum ieee80211_band band
)
189 if (mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_BASIC_DWELL
)
191 return band
== IEEE80211_BAND_2GHZ
? 100 + 20 : 100 + 10;
194 static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd
*cmd
,
195 struct cfg80211_scan_request
*req
,
197 struct iwl_mvm_scan_params
*params
)
199 struct iwl_scan_channel
*chan
= (struct iwl_scan_channel
*)
200 (cmd
->data
+ le16_to_cpu(cmd
->tx_cmd
.len
));
202 int type
= BIT(req
->n_ssids
) - 1;
203 enum ieee80211_band band
= req
->channels
[0]->band
;
206 type
|= BIT(req
->n_ssids
);
208 for (i
= 0; i
< cmd
->channel_count
; i
++) {
209 chan
->channel
= cpu_to_le16(req
->channels
[i
]->hw_value
);
210 chan
->type
= cpu_to_le32(type
);
211 if (req
->channels
[i
]->flags
& IEEE80211_CHAN_NO_IR
)
212 chan
->type
&= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE
);
213 chan
->active_dwell
= cpu_to_le16(params
->dwell
[band
].active
);
214 chan
->passive_dwell
= cpu_to_le16(params
->dwell
[band
].passive
);
215 chan
->iteration_count
= cpu_to_le16(1);
221 * Fill in probe request with the following parameters:
222 * TA is our vif HW address, which mac80211 ensures we have.
223 * Packet is broadcasted, so this is both SA and DA.
224 * The probe request IE is made out of two: first comes the most prioritized
225 * SSID if a directed scan is requested. Second comes whatever extra
226 * information was given to us as the scan request IE.
228 static u16
iwl_mvm_fill_probe_req(struct ieee80211_mgmt
*frame
, const u8
*ta
,
229 int n_ssids
, const u8
*ssid
, int ssid_len
,
230 const u8
*band_ie
, int band_ie_len
,
231 const u8
*common_ie
, int common_ie_len
,
237 /* Make sure there is enough space for the probe request,
238 * two mandatory IEs and the data */
243 frame
->frame_control
= cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
);
244 eth_broadcast_addr(frame
->da
);
245 memcpy(frame
->sa
, ta
, ETH_ALEN
);
246 eth_broadcast_addr(frame
->bssid
);
251 /* for passive scans, no need to fill anything */
255 /* points to the payload of the request */
256 pos
= &frame
->u
.probe_req
.variable
[0];
258 /* fill in our SSID IE */
259 left
-= ssid_len
+ 2;
262 *pos
++ = WLAN_EID_SSID
;
264 if (ssid
&& ssid_len
) { /* ssid_len may be == 0 even if ssid is valid */
265 memcpy(pos
, ssid
, ssid_len
);
271 if (WARN_ON(left
< band_ie_len
+ common_ie_len
))
274 if (band_ie
&& band_ie_len
) {
275 memcpy(pos
, band_ie
, band_ie_len
);
280 if (common_ie
&& common_ie_len
) {
281 memcpy(pos
, common_ie
, common_ie_len
);
282 pos
+= common_ie_len
;
283 len
+= common_ie_len
;
289 static void iwl_mvm_scan_condition_iterator(void *data
, u8
*mac
,
290 struct ieee80211_vif
*vif
)
292 struct iwl_mvm_vif
*mvmvif
= iwl_mvm_vif_from_mac80211(vif
);
293 int *global_cnt
= data
;
295 if (vif
->type
!= NL80211_IFTYPE_P2P_DEVICE
&& mvmvif
->phy_ctxt
&&
296 mvmvif
->phy_ctxt
->id
< MAX_PHYS
)
300 static void iwl_mvm_scan_calc_params(struct iwl_mvm
*mvm
,
301 struct ieee80211_vif
*vif
,
302 int n_ssids
, u32 flags
,
303 struct iwl_mvm_scan_params
*params
)
306 enum ieee80211_band band
;
307 u8 frag_passive_dwell
= 0;
309 ieee80211_iterate_active_interfaces_atomic(mvm
->hw
,
310 IEEE80211_IFACE_ITER_NORMAL
,
311 iwl_mvm_scan_condition_iterator
,
317 params
->suspend_time
= 30;
318 params
->max_out_time
= 120;
320 if (iwl_mvm_low_latency(mvm
)) {
321 if (mvm
->fw
->ucode_capa
.api
[0] &
322 IWL_UCODE_TLV_API_FRAGMENTED_SCAN
) {
323 params
->suspend_time
= 105;
325 * If there is more than one active interface make
326 * passive scan more fragmented.
328 frag_passive_dwell
= (global_cnt
< 2) ? 40 : 20;
329 params
->max_out_time
= frag_passive_dwell
;
331 params
->suspend_time
= 120;
332 params
->max_out_time
= 120;
336 if (frag_passive_dwell
&& (mvm
->fw
->ucode_capa
.api
[0] &
337 IWL_UCODE_TLV_API_FRAGMENTED_SCAN
)) {
339 * P2P device scan should not be fragmented to avoid negative
340 * impact on P2P device discovery. Configure max_out_time to be
341 * equal to dwell time on passive channel. Take a longest
342 * possible value, one that corresponds to 2GHz band
344 if (vif
->type
== NL80211_IFTYPE_P2P_DEVICE
) {
346 iwl_mvm_get_passive_dwell(mvm
,
347 IEEE80211_BAND_2GHZ
);
348 params
->max_out_time
= passive_dwell
;
350 params
->passive_fragmented
= true;
354 if (flags
& NL80211_SCAN_FLAG_LOW_PRIORITY
)
355 params
->max_out_time
= 200;
359 for (band
= IEEE80211_BAND_2GHZ
; band
< IEEE80211_NUM_BANDS
; band
++) {
360 if (params
->passive_fragmented
)
361 params
->dwell
[band
].passive
= frag_passive_dwell
;
363 params
->dwell
[band
].passive
=
364 iwl_mvm_get_passive_dwell(mvm
, band
);
365 params
->dwell
[band
].active
= iwl_mvm_get_active_dwell(mvm
, band
,
370 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm
*mvm
)
372 /* require rrm scan whenever the fw supports it */
373 return mvm
->fw
->ucode_capa
.capa
[0] &
374 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT
;
377 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm
*mvm
,
382 if (mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
)
383 max_probe_len
= SCAN_OFFLOAD_PROBE_REQ_SIZE
;
385 max_probe_len
= mvm
->fw
->ucode_capa
.max_probe_length
;
387 /* we create the 802.11 header and SSID element */
388 max_probe_len
-= 24 + 2;
390 /* basic ssid is added only for hw_scan with and old api */
391 if (!(mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID
) &&
392 !(mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
) &&
396 /* DS parameter set element is added on 2.4GHZ band if required */
397 if (iwl_mvm_rrm_scan_needed(mvm
))
400 return max_probe_len
;
403 int iwl_mvm_max_scan_ie_len(struct iwl_mvm
*mvm
, bool is_sched_scan
)
405 int max_ie_len
= iwl_mvm_max_scan_ie_fw_cmd_room(mvm
, is_sched_scan
);
407 if (!(mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
))
410 /* TODO: [BUG] This function should return the maximum allowed size of
411 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
412 * in the same command. So the correct implementation of this function
413 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
414 * command has only 512 bytes and it would leave us with about 240
415 * bytes for scan IEs, which is clearly not enough. So meanwhile
416 * we will report an incorrect value. This may result in a failure to
417 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
418 * functions with -ENOBUFS, if a large enough probe will be provided.
423 int iwl_mvm_scan_request(struct iwl_mvm
*mvm
,
424 struct ieee80211_vif
*vif
,
425 struct cfg80211_scan_request
*req
)
427 struct iwl_host_cmd hcmd
= {
428 .id
= SCAN_REQUEST_CMD
,
430 .data
= { mvm
->scan_cmd
, },
431 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
433 struct iwl_scan_cmd
*cmd
= mvm
->scan_cmd
;
438 bool basic_ssid
= !(mvm
->fw
->ucode_capa
.flags
&
439 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID
);
440 struct iwl_mvm_scan_params params
= {};
442 lockdep_assert_held(&mvm
->mutex
);
444 /* we should have failed registration if scan_cmd was NULL */
445 if (WARN_ON(mvm
->scan_cmd
== NULL
))
448 IWL_DEBUG_SCAN(mvm
, "Handling mac80211 scan request\n");
449 mvm
->scan_status
= IWL_MVM_SCAN_OS
;
450 memset(cmd
, 0, ksize(cmd
));
452 cmd
->channel_count
= (u8
)req
->n_channels
;
453 cmd
->quiet_time
= cpu_to_le16(IWL_ACTIVE_QUIET_TIME
);
454 cmd
->quiet_plcp_th
= cpu_to_le16(IWL_PLCP_QUIET_THRESH
);
455 cmd
->rxchain_sel_flags
= iwl_mvm_scan_rx_chain(mvm
);
457 iwl_mvm_scan_calc_params(mvm
, vif
, req
->n_ssids
, req
->flags
, ¶ms
);
458 cmd
->max_out_time
= cpu_to_le32(params
.max_out_time
);
459 cmd
->suspend_time
= cpu_to_le32(params
.suspend_time
);
460 if (params
.passive_fragmented
)
461 cmd
->scan_flags
|= SCAN_FLAGS_FRAGMENTED_SCAN
;
463 cmd
->rxon_flags
= iwl_mvm_scan_rxon_flags(req
->channels
[0]->band
);
464 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
|
465 MAC_FILTER_IN_BEACON
);
467 if (vif
->type
== NL80211_IFTYPE_P2P_DEVICE
)
468 cmd
->type
= cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED
);
470 cmd
->type
= cpu_to_le32(SCAN_TYPE_FORCED
);
472 cmd
->repeats
= cpu_to_le32(1);
475 * If the user asked for passive scan, don't change to active scan if
476 * you see any activity on the channel - remain passive.
478 if (req
->n_ssids
> 0) {
479 cmd
->passive2active
= cpu_to_le16(1);
480 cmd
->scan_flags
|= SCAN_FLAGS_PASSIVE2ACTIVE
;
482 ssid
= req
->ssids
[0].ssid
;
483 ssid_len
= req
->ssids
[0].ssid_len
;
486 cmd
->passive2active
= 0;
487 cmd
->scan_flags
&= ~SCAN_FLAGS_PASSIVE2ACTIVE
;
490 iwl_mvm_scan_fill_ssids(cmd
->direct_scan
, req
->ssids
, req
->n_ssids
,
493 cmd
->tx_cmd
.tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
494 3 << TX_CMD_FLG_BT_PRIO_POS
);
496 cmd
->tx_cmd
.sta_id
= mvm
->aux_sta
.sta_id
;
497 cmd
->tx_cmd
.life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
498 cmd
->tx_cmd
.rate_n_flags
=
499 iwl_mvm_scan_rate_n_flags(mvm
, req
->channels
[0]->band
,
503 cpu_to_le16(iwl_mvm_fill_probe_req(
504 (struct ieee80211_mgmt
*)cmd
->data
,
506 req
->n_ssids
, ssid
, ssid_len
,
507 req
->ie
, req
->ie_len
, NULL
, 0,
508 mvm
->fw
->ucode_capa
.max_probe_length
));
510 iwl_mvm_scan_fill_channels(cmd
, req
, basic_ssid
, ¶ms
);
512 cmd
->len
= cpu_to_le16(sizeof(struct iwl_scan_cmd
) +
513 le16_to_cpu(cmd
->tx_cmd
.len
) +
514 (cmd
->channel_count
* sizeof(struct iwl_scan_channel
)));
515 hcmd
.len
[0] = le16_to_cpu(cmd
->len
);
517 status
= SCAN_RESPONSE_OK
;
518 ret
= iwl_mvm_send_cmd_status(mvm
, &hcmd
, &status
);
519 if (!ret
&& status
== SCAN_RESPONSE_OK
) {
520 IWL_DEBUG_SCAN(mvm
, "Scan request was sent successfully\n");
523 * If the scan failed, it usually means that the FW was unable
524 * to allocate the time events. Warn on it, but maybe we
525 * should try to send the command again with different params.
527 IWL_ERR(mvm
, "Scan failed! status 0x%x ret %d\n",
529 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
535 int iwl_mvm_rx_scan_response(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
536 struct iwl_device_cmd
*cmd
)
538 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
539 struct iwl_cmd_response
*resp
= (void *)pkt
->data
;
541 IWL_DEBUG_SCAN(mvm
, "Scan response received. status 0x%x\n",
542 le32_to_cpu(resp
->status
));
546 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm
*mvm
,
547 struct iwl_rx_cmd_buffer
*rxb
,
548 struct iwl_device_cmd
*cmd
)
550 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
551 struct iwl_scan_complete_notif
*notif
= (void *)pkt
->data
;
554 "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
555 notif
->status
, notif
->scanned_channels
);
559 int iwl_mvm_rx_scan_complete(struct iwl_mvm
*mvm
, struct iwl_rx_cmd_buffer
*rxb
,
560 struct iwl_device_cmd
*cmd
)
562 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
563 struct iwl_scan_complete_notif
*notif
= (void *)pkt
->data
;
565 lockdep_assert_held(&mvm
->mutex
);
567 IWL_DEBUG_SCAN(mvm
, "Scan complete: status=0x%x scanned channels=%d\n",
568 notif
->status
, notif
->scanned_channels
);
570 if (mvm
->scan_status
== IWL_MVM_SCAN_OS
)
571 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
572 ieee80211_scan_completed(mvm
->hw
, notif
->status
!= SCAN_COMP_STATUS_OK
);
574 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
579 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm
*mvm
,
580 struct iwl_rx_cmd_buffer
*rxb
,
581 struct iwl_device_cmd
*cmd
)
583 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
585 if (!(mvm
->fw
->ucode_capa
.capa
[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN
) &&
586 !(mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
)) {
587 struct iwl_sched_scan_results
*notif
= (void *)pkt
->data
;
589 if (!(notif
->client_bitmap
& SCAN_CLIENT_SCHED_SCAN
))
593 IWL_DEBUG_SCAN(mvm
, "Scheduled scan results\n");
594 ieee80211_sched_scan_results(mvm
->hw
);
599 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data
*notif_wait
,
600 struct iwl_rx_packet
*pkt
, void *data
)
602 struct iwl_mvm
*mvm
=
603 container_of(notif_wait
, struct iwl_mvm
, notif_wait
);
604 struct iwl_scan_complete_notif
*notif
;
607 switch (pkt
->hdr
.cmd
) {
609 resp
= (void *)pkt
->data
;
610 if (*resp
== CAN_ABORT_STATUS
) {
612 "Scan can be aborted, wait until completion\n");
617 * If scan cannot be aborted, it means that we had a
618 * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
619 * ieee80211_scan_completed already.
621 IWL_DEBUG_SCAN(mvm
, "Scan cannot be aborted, exit now: %d\n",
625 case SCAN_COMPLETE_NOTIFICATION
:
626 notif
= (void *)pkt
->data
;
627 IWL_DEBUG_SCAN(mvm
, "Scan aborted: status 0x%x\n",
637 static int iwl_mvm_cancel_regular_scan(struct iwl_mvm
*mvm
)
639 struct iwl_notification_wait wait_scan_abort
;
640 static const u8 scan_abort_notif
[] = { SCAN_ABORT_CMD
,
641 SCAN_COMPLETE_NOTIFICATION
};
644 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_scan_abort
,
646 ARRAY_SIZE(scan_abort_notif
),
647 iwl_mvm_scan_abort_notif
, NULL
);
649 ret
= iwl_mvm_send_cmd_pdu(mvm
, SCAN_ABORT_CMD
, 0, 0, NULL
);
651 IWL_ERR(mvm
, "Couldn't send SCAN_ABORT_CMD: %d\n", ret
);
652 /* mac80211's state will be cleaned in the nic_restart flow */
653 goto out_remove_notif
;
656 return iwl_wait_notification(&mvm
->notif_wait
, &wait_scan_abort
, HZ
);
659 iwl_remove_notification(&mvm
->notif_wait
, &wait_scan_abort
);
663 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm
*mvm
,
664 struct iwl_rx_cmd_buffer
*rxb
,
665 struct iwl_device_cmd
*cmd
)
667 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
668 u8 status
, ebs_status
;
670 if (mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
) {
671 struct iwl_periodic_scan_complete
*scan_notif
;
673 scan_notif
= (void *)pkt
->data
;
674 status
= scan_notif
->status
;
675 ebs_status
= scan_notif
->ebs_status
;
677 struct iwl_scan_offload_complete
*scan_notif
;
679 scan_notif
= (void *)pkt
->data
;
680 status
= scan_notif
->status
;
681 ebs_status
= scan_notif
->ebs_status
;
683 /* scan status must be locked for proper checking */
684 lockdep_assert_held(&mvm
->mutex
);
687 "%s completed, status %s, EBS status %s\n",
688 mvm
->scan_status
== IWL_MVM_SCAN_SCHED
?
689 "Scheduled scan" : "Scan",
690 status
== IWL_SCAN_OFFLOAD_COMPLETED
?
691 "completed" : "aborted",
692 ebs_status
== IWL_SCAN_EBS_SUCCESS
?
693 "success" : "failed");
696 /* only call mac80211 completion if the stop was initiated by FW */
697 if (mvm
->scan_status
== IWL_MVM_SCAN_SCHED
) {
698 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
699 ieee80211_sched_scan_stopped(mvm
->hw
);
700 } else if (mvm
->scan_status
== IWL_MVM_SCAN_OS
) {
701 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
702 ieee80211_scan_completed(mvm
->hw
,
703 status
== IWL_SCAN_OFFLOAD_ABORTED
);
704 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
707 mvm
->last_ebs_successful
= !ebs_status
;
712 static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm
*mvm
,
713 struct ieee80211_vif
*vif
,
714 struct ieee80211_scan_ies
*ies
,
715 enum ieee80211_band band
,
716 struct iwl_tx_cmd
*cmd
,
721 cmd
->tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
);
722 cmd
->life_time
= cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE
);
723 cmd
->sta_id
= mvm
->aux_sta
.sta_id
;
725 cmd
->rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
, band
, false);
727 cmd_len
= iwl_mvm_fill_probe_req((struct ieee80211_mgmt
*)data
,
730 ies
->ies
[band
], ies
->len
[band
],
731 ies
->common_ies
, ies
->common_ie_len
,
732 SCAN_OFFLOAD_PROBE_REQ_SIZE
);
733 cmd
->len
= cpu_to_le16(cmd_len
);
736 static void iwl_build_scan_cmd(struct iwl_mvm
*mvm
,
737 struct ieee80211_vif
*vif
,
738 struct cfg80211_sched_scan_request
*req
,
739 struct iwl_scan_offload_cmd
*scan
,
740 struct iwl_mvm_scan_params
*params
)
742 scan
->channel_count
= req
->n_channels
;
743 scan
->quiet_time
= cpu_to_le16(IWL_ACTIVE_QUIET_TIME
);
744 scan
->quiet_plcp_th
= cpu_to_le16(IWL_PLCP_QUIET_THRESH
);
745 scan
->good_CRC_th
= IWL_GOOD_CRC_TH_DEFAULT
;
746 scan
->rx_chain
= iwl_mvm_scan_rx_chain(mvm
);
748 scan
->max_out_time
= cpu_to_le32(params
->max_out_time
);
749 scan
->suspend_time
= cpu_to_le32(params
->suspend_time
);
751 scan
->filter_flags
|= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
|
752 MAC_FILTER_IN_BEACON
);
753 scan
->scan_type
= cpu_to_le32(SCAN_TYPE_BACKGROUND
);
754 scan
->rep_count
= cpu_to_le32(1);
756 if (params
->passive_fragmented
)
757 scan
->scan_flags
|= SCAN_FLAGS_FRAGMENTED_SCAN
;
760 static int iwl_ssid_exist(u8
*ssid
, u8 ssid_len
, struct iwl_ssid_ie
*ssid_list
)
764 for (i
= 0; i
< PROBE_OPTION_MAX
; i
++) {
765 if (!ssid_list
[i
].len
)
767 if (ssid_list
[i
].len
== ssid_len
&&
768 !memcmp(ssid_list
->ssid
, ssid
, ssid_len
))
774 static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request
*req
,
775 struct iwl_ssid_ie
*direct_scan
,
776 u32
*ssid_bitmap
, bool basic_ssid
)
782 * copy SSIDs from match list.
783 * iwl_config_sched_scan_profiles() uses the order of these ssids to
786 for (i
= 0; i
< req
->n_match_sets
&& i
< PROBE_OPTION_MAX
; i
++) {
787 /* skip empty SSID matchsets */
788 if (!req
->match_sets
[i
].ssid
.ssid_len
)
790 direct_scan
[i
].id
= WLAN_EID_SSID
;
791 direct_scan
[i
].len
= req
->match_sets
[i
].ssid
.ssid_len
;
792 memcpy(direct_scan
[i
].ssid
, req
->match_sets
[i
].ssid
.ssid
,
796 /* add SSIDs from scan SSID list */
798 for (j
= 0; j
< req
->n_ssids
&& i
< PROBE_OPTION_MAX
; j
++) {
799 index
= iwl_ssid_exist(req
->ssids
[j
].ssid
,
800 req
->ssids
[j
].ssid_len
,
803 if (!req
->ssids
[j
].ssid_len
&& basic_ssid
)
805 direct_scan
[i
].id
= WLAN_EID_SSID
;
806 direct_scan
[i
].len
= req
->ssids
[j
].ssid_len
;
807 memcpy(direct_scan
[i
].ssid
, req
->ssids
[j
].ssid
,
809 *ssid_bitmap
|= BIT(i
+ 1);
812 *ssid_bitmap
|= BIT(index
+ 1);
817 static void iwl_build_channel_cfg(struct iwl_mvm
*mvm
,
818 struct cfg80211_sched_scan_request
*req
,
820 enum ieee80211_band band
,
823 struct iwl_mvm_scan_params
*params
)
825 u32 n_channels
= mvm
->fw
->ucode_capa
.n_scan_channels
;
826 __le32
*type
= (__le32
*)channels_buffer
;
827 __le16
*channel_number
= (__le16
*)(type
+ n_channels
);
828 __le16
*iter_count
= channel_number
+ n_channels
;
829 __le32
*iter_interval
= (__le32
*)(iter_count
+ n_channels
);
830 u8
*active_dwell
= (u8
*)(iter_interval
+ n_channels
);
831 u8
*passive_dwell
= active_dwell
+ n_channels
;
834 for (i
= 0; i
< req
->n_channels
; i
++) {
835 struct ieee80211_channel
*chan
= req
->channels
[i
];
837 if (chan
->band
!= band
)
843 channel_number
[index
] = cpu_to_le16(chan
->hw_value
);
844 active_dwell
[index
] = params
->dwell
[band
].active
;
845 passive_dwell
[index
] = params
->dwell
[band
].passive
;
847 iter_count
[index
] = cpu_to_le16(1);
848 iter_interval
[index
] = 0;
850 if (!(chan
->flags
& IEEE80211_CHAN_NO_IR
))
852 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE
);
854 type
[index
] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL
|
855 IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL
);
857 if (chan
->flags
& IEEE80211_CHAN_NO_HT40
)
859 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW
);
861 /* scan for all SSIDs from req->ssids */
862 type
[index
] |= cpu_to_le32(ssid_bitmap
);
866 int iwl_mvm_config_sched_scan(struct iwl_mvm
*mvm
,
867 struct ieee80211_vif
*vif
,
868 struct cfg80211_sched_scan_request
*req
,
869 struct ieee80211_scan_ies
*ies
)
871 int band_2ghz
= mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
].n_channels
;
872 int band_5ghz
= mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
].n_channels
;
878 bool basic_ssid
= !(mvm
->fw
->ucode_capa
.flags
&
879 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID
);
881 struct iwl_scan_offload_cfg
*scan_cfg
;
882 struct iwl_host_cmd cmd
= {
883 .id
= SCAN_OFFLOAD_CONFIG_CMD
,
885 struct iwl_mvm_scan_params params
= {};
887 lockdep_assert_held(&mvm
->mutex
);
889 cmd_len
= sizeof(struct iwl_scan_offload_cfg
) +
890 mvm
->fw
->ucode_capa
.n_scan_channels
* IWL_SCAN_CHAN_SIZE
+
891 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE
;
893 scan_cfg
= kzalloc(cmd_len
, GFP_KERNEL
);
897 probes
= scan_cfg
->data
+
898 mvm
->fw
->ucode_capa
.n_scan_channels
* IWL_SCAN_CHAN_SIZE
;
900 iwl_mvm_scan_calc_params(mvm
, vif
, req
->n_ssids
, 0, ¶ms
);
901 iwl_build_scan_cmd(mvm
, vif
, req
, &scan_cfg
->scan_cmd
, ¶ms
);
902 scan_cfg
->scan_cmd
.len
= cpu_to_le16(cmd_len
);
904 iwl_scan_offload_build_ssid(req
, scan_cfg
->scan_cmd
.direct_scan
,
905 &ssid_bitmap
, basic_ssid
);
906 /* build tx frames for supported bands */
908 iwl_scan_offload_build_tx_cmd(mvm
, vif
, ies
,
910 &scan_cfg
->scan_cmd
.tx_cmd
[0],
912 iwl_build_channel_cfg(mvm
, req
, scan_cfg
->data
,
913 IEEE80211_BAND_2GHZ
, &head
,
914 ssid_bitmap
, ¶ms
);
917 iwl_scan_offload_build_tx_cmd(mvm
, vif
, ies
,
919 &scan_cfg
->scan_cmd
.tx_cmd
[1],
921 SCAN_OFFLOAD_PROBE_REQ_SIZE
);
922 iwl_build_channel_cfg(mvm
, req
, scan_cfg
->data
,
923 IEEE80211_BAND_5GHZ
, &head
,
924 ssid_bitmap
, ¶ms
);
927 cmd
.data
[0] = scan_cfg
;
928 cmd
.len
[0] = cmd_len
;
929 cmd
.dataflags
[0] = IWL_HCMD_DFL_NOCOPY
;
931 IWL_DEBUG_SCAN(mvm
, "Sending scheduled scan config\n");
933 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
938 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm
*mvm
,
939 struct cfg80211_sched_scan_request
*req
)
941 struct iwl_scan_offload_profile
*profile
;
942 struct iwl_scan_offload_profile_cfg
*profile_cfg
;
943 struct iwl_scan_offload_blacklist
*blacklist
;
944 struct iwl_host_cmd cmd
= {
945 .id
= SCAN_OFFLOAD_UPDATE_PROFILES_CMD
,
946 .len
[1] = sizeof(*profile_cfg
),
947 .dataflags
[0] = IWL_HCMD_DFL_NOCOPY
,
948 .dataflags
[1] = IWL_HCMD_DFL_NOCOPY
,
954 if (WARN_ON(req
->n_match_sets
> IWL_SCAN_MAX_PROFILES
))
957 if (mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_SHORT_BL
)
958 blacklist_len
= IWL_SCAN_SHORT_BLACKLIST_LEN
;
960 blacklist_len
= IWL_SCAN_MAX_BLACKLIST_LEN
;
962 blacklist
= kzalloc(sizeof(*blacklist
) * blacklist_len
, GFP_KERNEL
);
966 profile_cfg
= kzalloc(sizeof(*profile_cfg
), GFP_KERNEL
);
972 cmd
.data
[0] = blacklist
;
973 cmd
.len
[0] = sizeof(*blacklist
) * blacklist_len
;
974 cmd
.data
[1] = profile_cfg
;
976 /* No blacklist configuration */
978 profile_cfg
->num_profiles
= req
->n_match_sets
;
979 profile_cfg
->active_clients
= SCAN_CLIENT_SCHED_SCAN
;
980 profile_cfg
->pass_match
= SCAN_CLIENT_SCHED_SCAN
;
981 profile_cfg
->match_notify
= SCAN_CLIENT_SCHED_SCAN
;
982 if (!req
->n_match_sets
|| !req
->match_sets
[0].ssid
.ssid_len
)
983 profile_cfg
->any_beacon_notify
= SCAN_CLIENT_SCHED_SCAN
;
985 for (i
= 0; i
< req
->n_match_sets
; i
++) {
986 profile
= &profile_cfg
->profiles
[i
];
987 profile
->ssid_index
= i
;
988 /* Support any cipher and auth algorithm */
989 profile
->unicast_cipher
= 0xff;
990 profile
->auth_alg
= 0xff;
991 profile
->network_type
= IWL_NETWORK_TYPE_ANY
;
992 profile
->band_selection
= IWL_SCAN_OFFLOAD_SELECT_ANY
;
993 profile
->client_bitmap
= SCAN_CLIENT_SCHED_SCAN
;
996 IWL_DEBUG_SCAN(mvm
, "Sending scheduled scan profile config\n");
998 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
1006 static bool iwl_mvm_scan_pass_all(struct iwl_mvm
*mvm
,
1007 struct cfg80211_sched_scan_request
*req
)
1009 if (req
->n_match_sets
&& req
->match_sets
[0].ssid
.ssid_len
) {
1011 "Sending scheduled scan with filtering, n_match_sets %d\n",
1016 IWL_DEBUG_SCAN(mvm
, "Sending Scheduled scan without filtering\n");
1020 int iwl_mvm_sched_scan_start(struct iwl_mvm
*mvm
,
1021 struct cfg80211_sched_scan_request
*req
)
1023 struct iwl_scan_offload_req scan_req
= {
1024 .watchdog
= IWL_SCHED_SCAN_WATCHDOG
,
1026 .schedule_line
[0].iterations
= IWL_FAST_SCHED_SCAN_ITERATIONS
,
1027 .schedule_line
[0].delay
= cpu_to_le16(req
->interval
/ 1000),
1028 .schedule_line
[0].full_scan_mul
= 1,
1030 .schedule_line
[1].iterations
= 0xff,
1031 .schedule_line
[1].delay
= cpu_to_le16(req
->interval
/ 1000),
1032 .schedule_line
[1].full_scan_mul
= IWL_FULL_SCAN_MULTIPLIER
,
1035 if (iwl_mvm_scan_pass_all(mvm
, req
))
1036 scan_req
.flags
|= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL
);
1038 if (mvm
->last_ebs_successful
&&
1039 mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_EBS_SUPPORT
)
1041 cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE
);
1043 return iwl_mvm_send_cmd_pdu(mvm
, SCAN_OFFLOAD_REQUEST_CMD
, 0,
1044 sizeof(scan_req
), &scan_req
);
1047 int iwl_mvm_scan_offload_start(struct iwl_mvm
*mvm
,
1048 struct ieee80211_vif
*vif
,
1049 struct cfg80211_sched_scan_request
*req
,
1050 struct ieee80211_scan_ies
*ies
)
1054 if (mvm
->fw
->ucode_capa
.capa
[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN
) {
1055 ret
= iwl_mvm_config_sched_scan_profiles(mvm
, req
);
1058 ret
= iwl_mvm_sched_scan_umac(mvm
, vif
, req
, ies
);
1059 } else if ((mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
)) {
1060 mvm
->scan_status
= IWL_MVM_SCAN_SCHED
;
1061 ret
= iwl_mvm_config_sched_scan_profiles(mvm
, req
);
1064 ret
= iwl_mvm_unified_sched_scan_lmac(mvm
, vif
, req
, ies
);
1066 mvm
->scan_status
= IWL_MVM_SCAN_SCHED
;
1067 ret
= iwl_mvm_config_sched_scan(mvm
, vif
, req
, ies
);
1070 ret
= iwl_mvm_config_sched_scan_profiles(mvm
, req
);
1073 ret
= iwl_mvm_sched_scan_start(mvm
, req
);
1079 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm
*mvm
)
1082 struct iwl_host_cmd cmd
= {
1083 .id
= SCAN_OFFLOAD_ABORT_CMD
,
1087 /* Exit instantly with error when device is not ready
1088 * to receive scan abort command or it does not perform
1089 * scheduled scan currently */
1090 if (mvm
->scan_status
!= IWL_MVM_SCAN_SCHED
&&
1091 (!(mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
) ||
1092 mvm
->scan_status
!= IWL_MVM_SCAN_OS
))
1095 ret
= iwl_mvm_send_cmd_status(mvm
, &cmd
, &status
);
1099 if (status
!= CAN_ABORT_STATUS
) {
1101 * The scan abort will return 1 for success or
1102 * 2 for "failure". A failure condition can be
1103 * due to simply not being in an active scan which
1104 * can occur if we send the scan abort before the
1105 * microcode has notified us that a scan is completed.
1107 IWL_DEBUG_SCAN(mvm
, "SCAN OFFLOAD ABORT ret %d.\n", status
);
1114 int iwl_mvm_scan_offload_stop(struct iwl_mvm
*mvm
, bool notify
)
1117 struct iwl_notification_wait wait_scan_done
;
1118 static const u8 scan_done_notif
[] = { SCAN_OFFLOAD_COMPLETE
, };
1119 bool sched
= mvm
->scan_status
== IWL_MVM_SCAN_SCHED
;
1121 lockdep_assert_held(&mvm
->mutex
);
1123 if (mvm
->fw
->ucode_capa
.capa
[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN
)
1124 return iwl_umac_scan_stop(mvm
, IWL_UMAC_SCAN_UID_SCHED_SCAN
,
1127 if (mvm
->scan_status
!= IWL_MVM_SCAN_SCHED
&&
1128 (!(mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
) ||
1129 mvm
->scan_status
!= IWL_MVM_SCAN_OS
)) {
1130 IWL_DEBUG_SCAN(mvm
, "No scan to stop\n");
1134 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_scan_done
,
1136 ARRAY_SIZE(scan_done_notif
),
1139 ret
= iwl_mvm_send_scan_offload_abort(mvm
);
1141 IWL_DEBUG_SCAN(mvm
, "Send stop %sscan failed %d\n",
1142 sched
? "offloaded " : "", ret
);
1143 iwl_remove_notification(&mvm
->notif_wait
, &wait_scan_done
);
1147 IWL_DEBUG_SCAN(mvm
, "Successfully sent stop %sscan\n",
1148 sched
? "offloaded " : "");
1150 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_scan_done
, 1 * HZ
);
1155 * Clear the scan status so the next scan requests will succeed. This
1156 * also ensures the Rx handler doesn't do anything, as the scan was
1157 * stopped from above. Since the rx handler won't do anything now,
1158 * we have to release the scan reference here.
1160 if (mvm
->scan_status
== IWL_MVM_SCAN_OS
)
1161 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1163 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
1167 ieee80211_sched_scan_stopped(mvm
->hw
);
1169 ieee80211_scan_completed(mvm
->hw
, true);
1175 static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm
*mvm
,
1176 struct iwl_scan_req_tx_cmd
*tx_cmd
,
1179 tx_cmd
[0].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
1181 tx_cmd
[0].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
1182 IEEE80211_BAND_2GHZ
,
1184 tx_cmd
[0].sta_id
= mvm
->aux_sta
.sta_id
;
1186 tx_cmd
[1].tx_flags
= cpu_to_le32(TX_CMD_FLG_SEQ_CTL
|
1188 tx_cmd
[1].rate_n_flags
= iwl_mvm_scan_rate_n_flags(mvm
,
1189 IEEE80211_BAND_5GHZ
,
1191 tx_cmd
[1].sta_id
= mvm
->aux_sta
.sta_id
;
1195 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm
*mvm
,
1196 struct ieee80211_channel
**channels
,
1197 int n_channels
, u32 ssid_bitmap
,
1198 struct iwl_scan_req_unified_lmac
*cmd
)
1200 struct iwl_scan_channel_cfg_lmac
*channel_cfg
= (void *)&cmd
->data
;
1203 for (i
= 0; i
< n_channels
; i
++) {
1204 channel_cfg
[i
].channel_num
=
1205 cpu_to_le16(channels
[i
]->hw_value
);
1206 channel_cfg
[i
].iter_count
= cpu_to_le16(1);
1207 channel_cfg
[i
].iter_interval
= 0;
1208 channel_cfg
[i
].flags
=
1209 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL
|
1214 static u8
*iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm
*mvm
, const u8
*ies
,
1215 size_t len
, u8
*const pos
)
1217 static const u8 before_ds_params
[] = {
1219 WLAN_EID_SUPP_RATES
,
1221 WLAN_EID_EXT_SUPP_RATES
,
1226 if (!iwl_mvm_rrm_scan_needed(mvm
)) {
1227 memcpy(newpos
, ies
, len
);
1228 return newpos
+ len
;
1231 offs
= ieee80211_ie_split(ies
, len
,
1233 ARRAY_SIZE(before_ds_params
),
1236 memcpy(newpos
, ies
, offs
);
1239 /* Add a placeholder for DS Parameter Set element */
1240 *newpos
++ = WLAN_EID_DS_PARAMS
;
1244 memcpy(newpos
, ies
+ offs
, len
- offs
);
1245 newpos
+= len
- offs
;
1251 iwl_mvm_build_unified_scan_probe(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1252 struct ieee80211_scan_ies
*ies
,
1253 struct iwl_scan_probe_req
*preq
,
1254 const u8
*mac_addr
, const u8
*mac_addr_mask
)
1256 struct ieee80211_mgmt
*frame
= (struct ieee80211_mgmt
*)preq
->buf
;
1260 * Unfortunately, right now the offload scan doesn't support randomising
1261 * within the firmware, so until the firmware API is ready we implement
1262 * it in the driver. This means that the scan iterations won't really be
1263 * random, only when it's restarted, but at least that helps a bit.
1266 get_random_mask_addr(frame
->sa
, mac_addr
, mac_addr_mask
);
1268 memcpy(frame
->sa
, vif
->addr
, ETH_ALEN
);
1270 frame
->frame_control
= cpu_to_le16(IEEE80211_STYPE_PROBE_REQ
);
1271 eth_broadcast_addr(frame
->da
);
1272 eth_broadcast_addr(frame
->bssid
);
1273 frame
->seq_ctrl
= 0;
1275 pos
= frame
->u
.probe_req
.variable
;
1276 *pos
++ = WLAN_EID_SSID
;
1279 preq
->mac_header
.offset
= 0;
1280 preq
->mac_header
.len
= cpu_to_le16(24 + 2);
1282 /* Insert ds parameter set element on 2.4 GHz band */
1283 newpos
= iwl_mvm_copy_and_insert_ds_elem(mvm
,
1284 ies
->ies
[IEEE80211_BAND_2GHZ
],
1285 ies
->len
[IEEE80211_BAND_2GHZ
],
1287 preq
->band_data
[0].offset
= cpu_to_le16(pos
- preq
->buf
);
1288 preq
->band_data
[0].len
= cpu_to_le16(newpos
- pos
);
1291 memcpy(pos
, ies
->ies
[IEEE80211_BAND_5GHZ
],
1292 ies
->len
[IEEE80211_BAND_5GHZ
]);
1293 preq
->band_data
[1].offset
= cpu_to_le16(pos
- preq
->buf
);
1294 preq
->band_data
[1].len
= cpu_to_le16(ies
->len
[IEEE80211_BAND_5GHZ
]);
1295 pos
+= ies
->len
[IEEE80211_BAND_5GHZ
];
1297 memcpy(pos
, ies
->common_ies
, ies
->common_ie_len
);
1298 preq
->common_data
.offset
= cpu_to_le16(pos
- preq
->buf
);
1299 preq
->common_data
.len
= cpu_to_le16(ies
->common_ie_len
);
1303 iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm
*mvm
,
1304 struct iwl_scan_req_unified_lmac
*cmd
,
1305 struct iwl_mvm_scan_params
*params
)
1307 memset(cmd
, 0, ksize(cmd
));
1308 cmd
->active_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].active
;
1309 cmd
->passive_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].passive
;
1310 if (params
->passive_fragmented
)
1311 cmd
->fragmented_dwell
=
1312 params
->dwell
[IEEE80211_BAND_2GHZ
].passive
;
1313 cmd
->rx_chain_select
= iwl_mvm_scan_rx_chain(mvm
);
1314 cmd
->max_out_time
= cpu_to_le32(params
->max_out_time
);
1315 cmd
->suspend_time
= cpu_to_le32(params
->suspend_time
);
1316 cmd
->scan_prio
= cpu_to_le32(IWL_SCAN_PRIORITY_HIGH
);
1317 cmd
->iter_num
= cpu_to_le32(1);
1319 if (mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_EBS_SUPPORT
&&
1320 mvm
->last_ebs_successful
) {
1321 cmd
->channel_opt
[0].flags
=
1322 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
1323 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
1324 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
1325 cmd
->channel_opt
[0].non_ebs_ratio
=
1326 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO
);
1327 cmd
->channel_opt
[1].flags
=
1328 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS
|
1329 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
1330 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
);
1331 cmd
->channel_opt
[1].non_ebs_ratio
=
1332 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO
);
1335 if (iwl_mvm_rrm_scan_needed(mvm
))
1337 cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED
);
1340 int iwl_mvm_unified_scan_lmac(struct iwl_mvm
*mvm
,
1341 struct ieee80211_vif
*vif
,
1342 struct ieee80211_scan_request
*req
)
1344 struct iwl_host_cmd hcmd
= {
1345 .id
= SCAN_OFFLOAD_REQUEST_CMD
,
1346 .len
= { sizeof(struct iwl_scan_req_unified_lmac
) +
1347 sizeof(struct iwl_scan_channel_cfg_lmac
) *
1348 mvm
->fw
->ucode_capa
.n_scan_channels
+
1349 sizeof(struct iwl_scan_probe_req
), },
1350 .data
= { mvm
->scan_cmd
, },
1351 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1353 struct iwl_scan_req_unified_lmac
*cmd
= mvm
->scan_cmd
;
1354 struct iwl_scan_probe_req
*preq
;
1355 struct iwl_mvm_scan_params params
= {};
1357 u32 ssid_bitmap
= 0;
1360 lockdep_assert_held(&mvm
->mutex
);
1362 /* we should have failed registration if scan_cmd was NULL */
1363 if (WARN_ON(mvm
->scan_cmd
== NULL
))
1366 if (req
->req
.n_ssids
> PROBE_OPTION_MAX
||
1367 req
->ies
.common_ie_len
+ req
->ies
.len
[NL80211_BAND_2GHZ
] +
1368 req
->ies
.len
[NL80211_BAND_5GHZ
] >
1369 iwl_mvm_max_scan_ie_fw_cmd_room(mvm
, false) ||
1370 req
->req
.n_channels
> mvm
->fw
->ucode_capa
.n_scan_channels
)
1373 mvm
->scan_status
= IWL_MVM_SCAN_OS
;
1375 iwl_mvm_scan_calc_params(mvm
, vif
, req
->req
.n_ssids
, req
->req
.flags
,
1378 iwl_mvm_build_generic_unified_scan_cmd(mvm
, cmd
, ¶ms
);
1380 cmd
->n_channels
= (u8
)req
->req
.n_channels
;
1382 flags
= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL
;
1384 if (req
->req
.n_ssids
== 1 && req
->req
.ssids
[0].ssid_len
!= 0)
1385 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION
;
1387 if (params
.passive_fragmented
)
1388 flags
|= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED
;
1390 if (req
->req
.n_ssids
== 0)
1391 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE
;
1393 cmd
->scan_flags
|= cpu_to_le32(flags
);
1395 cmd
->flags
= iwl_mvm_scan_rxon_flags(req
->req
.channels
[0]->band
);
1396 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
|
1397 MAC_FILTER_IN_BEACON
);
1398 iwl_mvm_unified_scan_fill_tx_cmd(mvm
, cmd
->tx_cmd
, req
->req
.no_cck
);
1399 iwl_mvm_scan_fill_ssids(cmd
->direct_scan
, req
->req
.ssids
,
1400 req
->req
.n_ssids
, 0);
1402 cmd
->schedule
[0].delay
= 0;
1403 cmd
->schedule
[0].iterations
= 1;
1404 cmd
->schedule
[0].full_scan_mul
= 0;
1405 cmd
->schedule
[1].delay
= 0;
1406 cmd
->schedule
[1].iterations
= 0;
1407 cmd
->schedule
[1].full_scan_mul
= 0;
1409 for (i
= 1; i
<= req
->req
.n_ssids
; i
++)
1410 ssid_bitmap
|= BIT(i
);
1412 iwl_mvm_lmac_scan_cfg_channels(mvm
, req
->req
.channels
,
1413 req
->req
.n_channels
, ssid_bitmap
,
1416 preq
= (void *)(cmd
->data
+ sizeof(struct iwl_scan_channel_cfg_lmac
) *
1417 mvm
->fw
->ucode_capa
.n_scan_channels
);
1419 iwl_mvm_build_unified_scan_probe(mvm
, vif
, &req
->ies
, preq
,
1420 req
->req
.flags
& NL80211_SCAN_FLAG_RANDOM_ADDR
?
1421 req
->req
.mac_addr
: NULL
,
1422 req
->req
.mac_addr_mask
);
1424 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1426 IWL_DEBUG_SCAN(mvm
, "Scan request was sent successfully\n");
1429 * If the scan failed, it usually means that the FW was unable
1430 * to allocate the time events. Warn on it, but maybe we
1431 * should try to send the command again with different params.
1433 IWL_ERR(mvm
, "Scan failed! ret %d\n", ret
);
1434 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
1440 int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm
*mvm
,
1441 struct ieee80211_vif
*vif
,
1442 struct cfg80211_sched_scan_request
*req
,
1443 struct ieee80211_scan_ies
*ies
)
1445 struct iwl_host_cmd hcmd
= {
1446 .id
= SCAN_OFFLOAD_REQUEST_CMD
,
1447 .len
= { sizeof(struct iwl_scan_req_unified_lmac
) +
1448 sizeof(struct iwl_scan_channel_cfg_lmac
) *
1449 mvm
->fw
->ucode_capa
.n_scan_channels
+
1450 sizeof(struct iwl_scan_probe_req
), },
1451 .data
= { mvm
->scan_cmd
, },
1452 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1454 struct iwl_scan_req_unified_lmac
*cmd
= mvm
->scan_cmd
;
1455 struct iwl_scan_probe_req
*preq
;
1456 struct iwl_mvm_scan_params params
= {};
1458 u32 flags
= 0, ssid_bitmap
= 0;
1460 lockdep_assert_held(&mvm
->mutex
);
1462 /* we should have failed registration if scan_cmd was NULL */
1463 if (WARN_ON(mvm
->scan_cmd
== NULL
))
1466 if (req
->n_ssids
> PROBE_OPTION_MAX
||
1467 ies
->common_ie_len
+ ies
->len
[NL80211_BAND_2GHZ
] +
1468 ies
->len
[NL80211_BAND_5GHZ
] >
1469 iwl_mvm_max_scan_ie_fw_cmd_room(mvm
, true) ||
1470 req
->n_channels
> mvm
->fw
->ucode_capa
.n_scan_channels
)
1473 iwl_mvm_scan_calc_params(mvm
, vif
, req
->n_ssids
, 0, ¶ms
);
1475 iwl_mvm_build_generic_unified_scan_cmd(mvm
, cmd
, ¶ms
);
1477 cmd
->n_channels
= (u8
)req
->n_channels
;
1479 if (iwl_mvm_scan_pass_all(mvm
, req
))
1480 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL
;
1482 if (req
->n_ssids
== 1 && req
->ssids
[0].ssid_len
!= 0)
1483 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION
;
1485 if (params
.passive_fragmented
)
1486 flags
|= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED
;
1488 if (req
->n_ssids
== 0)
1489 flags
|= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE
;
1491 #ifdef CONFIG_IWLWIFI_DEBUGFS
1492 if (mvm
->scan_iter_notif_enabled
)
1493 flags
|= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE
;
1496 cmd
->scan_flags
|= cpu_to_le32(flags
);
1498 cmd
->flags
= iwl_mvm_scan_rxon_flags(req
->channels
[0]->band
);
1499 cmd
->filter_flags
= cpu_to_le32(MAC_FILTER_ACCEPT_GRP
|
1500 MAC_FILTER_IN_BEACON
);
1501 iwl_mvm_unified_scan_fill_tx_cmd(mvm
, cmd
->tx_cmd
, false);
1502 iwl_scan_offload_build_ssid(req
, cmd
->direct_scan
, &ssid_bitmap
, false);
1504 cmd
->schedule
[0].delay
= cpu_to_le16(req
->interval
/ MSEC_PER_SEC
);
1505 cmd
->schedule
[0].iterations
= IWL_FAST_SCHED_SCAN_ITERATIONS
;
1506 cmd
->schedule
[0].full_scan_mul
= 1;
1508 cmd
->schedule
[1].delay
= cpu_to_le16(req
->interval
/ MSEC_PER_SEC
);
1509 cmd
->schedule
[1].iterations
= 0xff;
1510 cmd
->schedule
[1].full_scan_mul
= IWL_FULL_SCAN_MULTIPLIER
;
1512 iwl_mvm_lmac_scan_cfg_channels(mvm
, req
->channels
, req
->n_channels
,
1515 preq
= (void *)(cmd
->data
+ sizeof(struct iwl_scan_channel_cfg_lmac
) *
1516 mvm
->fw
->ucode_capa
.n_scan_channels
);
1518 iwl_mvm_build_unified_scan_probe(mvm
, vif
, ies
, preq
,
1519 req
->flags
& NL80211_SCAN_FLAG_RANDOM_ADDR
?
1520 req
->mac_addr
: NULL
,
1521 req
->mac_addr_mask
);
1523 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1526 "Sched scan request was sent successfully\n");
1529 * If the scan failed, it usually means that the FW was unable
1530 * to allocate the time events. Warn on it, but maybe we
1531 * should try to send the command again with different params.
1533 IWL_ERR(mvm
, "Sched scan failed! ret %d\n", ret
);
1534 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
1541 int iwl_mvm_cancel_scan(struct iwl_mvm
*mvm
)
1543 if (mvm
->fw
->ucode_capa
.capa
[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN
)
1544 return iwl_umac_scan_stop(mvm
, IWL_UMAC_SCAN_UID_REG_SCAN
,
1547 if (mvm
->scan_status
== IWL_MVM_SCAN_NONE
)
1550 if (iwl_mvm_is_radio_killed(mvm
)) {
1551 ieee80211_scan_completed(mvm
->hw
, true);
1552 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
1553 mvm
->scan_status
= IWL_MVM_SCAN_NONE
;
1557 if (mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
)
1558 return iwl_mvm_scan_offload_stop(mvm
, true);
1559 return iwl_mvm_cancel_regular_scan(mvm
);
1564 struct iwl_umac_scan_done
{
1565 struct iwl_mvm
*mvm
;
1566 enum iwl_umac_scan_uid_type type
;
1569 static int rate_to_scan_rate_flag(unsigned int rate
)
1571 static const int rate_to_scan_rate
[IWL_RATE_COUNT
] = {
1572 [IWL_RATE_1M_INDEX
] = SCAN_CONFIG_RATE_1M
,
1573 [IWL_RATE_2M_INDEX
] = SCAN_CONFIG_RATE_2M
,
1574 [IWL_RATE_5M_INDEX
] = SCAN_CONFIG_RATE_5M
,
1575 [IWL_RATE_11M_INDEX
] = SCAN_CONFIG_RATE_11M
,
1576 [IWL_RATE_6M_INDEX
] = SCAN_CONFIG_RATE_6M
,
1577 [IWL_RATE_9M_INDEX
] = SCAN_CONFIG_RATE_9M
,
1578 [IWL_RATE_12M_INDEX
] = SCAN_CONFIG_RATE_12M
,
1579 [IWL_RATE_18M_INDEX
] = SCAN_CONFIG_RATE_18M
,
1580 [IWL_RATE_24M_INDEX
] = SCAN_CONFIG_RATE_24M
,
1581 [IWL_RATE_36M_INDEX
] = SCAN_CONFIG_RATE_36M
,
1582 [IWL_RATE_48M_INDEX
] = SCAN_CONFIG_RATE_48M
,
1583 [IWL_RATE_54M_INDEX
] = SCAN_CONFIG_RATE_54M
,
1586 return rate_to_scan_rate
[rate
];
1589 static __le32
iwl_mvm_scan_config_rates(struct iwl_mvm
*mvm
)
1591 struct ieee80211_supported_band
*band
;
1592 unsigned int rates
= 0;
1595 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
];
1596 for (i
= 0; i
< band
->n_bitrates
; i
++)
1597 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
1598 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
];
1599 for (i
= 0; i
< band
->n_bitrates
; i
++)
1600 rates
|= rate_to_scan_rate_flag(band
->bitrates
[i
].hw_value
);
1602 /* Set both basic rates and supported rates */
1603 rates
|= SCAN_CONFIG_SUPPORTED_RATE(rates
);
1605 return cpu_to_le32(rates
);
1608 int iwl_mvm_config_scan(struct iwl_mvm
*mvm
)
1611 struct iwl_scan_config
*scan_config
;
1612 struct ieee80211_supported_band
*band
;
1614 mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
].n_channels
+
1615 mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
].n_channels
;
1616 int ret
, i
, j
= 0, cmd_size
, data_size
;
1617 struct iwl_host_cmd cmd
= {
1621 if (WARN_ON(num_channels
> mvm
->fw
->ucode_capa
.n_scan_channels
))
1624 cmd_size
= sizeof(*scan_config
) + mvm
->fw
->ucode_capa
.n_scan_channels
;
1626 scan_config
= kzalloc(cmd_size
, GFP_KERNEL
);
1630 data_size
= cmd_size
- sizeof(struct iwl_mvm_umac_cmd_hdr
);
1631 scan_config
->hdr
.size
= cpu_to_le16(data_size
);
1632 scan_config
->flags
= cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE
|
1633 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS
|
1634 SCAN_CONFIG_FLAG_SET_TX_CHAINS
|
1635 SCAN_CONFIG_FLAG_SET_RX_CHAINS
|
1636 SCAN_CONFIG_FLAG_SET_ALL_TIMES
|
1637 SCAN_CONFIG_FLAG_SET_LEGACY_RATES
|
1638 SCAN_CONFIG_FLAG_SET_MAC_ADDR
|
1639 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS
|
1640 SCAN_CONFIG_N_CHANNELS(num_channels
));
1641 scan_config
->tx_chains
= cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm
));
1642 scan_config
->rx_chains
= cpu_to_le32(iwl_mvm_scan_rx_ant(mvm
));
1643 scan_config
->legacy_rates
= iwl_mvm_scan_config_rates(mvm
);
1644 scan_config
->out_of_channel_time
= cpu_to_le32(170);
1645 scan_config
->suspend_time
= cpu_to_le32(30);
1646 scan_config
->dwell_active
= 20;
1647 scan_config
->dwell_passive
= 110;
1648 scan_config
->dwell_fragmented
= 20;
1650 memcpy(&scan_config
->mac_addr
, &mvm
->addresses
[0].addr
, ETH_ALEN
);
1652 scan_config
->bcast_sta_id
= mvm
->aux_sta
.sta_id
;
1653 scan_config
->channel_flags
= IWL_CHANNEL_FLAG_EBS
|
1654 IWL_CHANNEL_FLAG_ACCURATE_EBS
|
1655 IWL_CHANNEL_FLAG_EBS_ADD
|
1656 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE
;
1658 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_2GHZ
];
1659 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
1660 scan_config
->channel_array
[j
] = band
->channels
[i
].center_freq
;
1661 band
= &mvm
->nvm_data
->bands
[IEEE80211_BAND_5GHZ
];
1662 for (i
= 0; i
< band
->n_channels
; i
++, j
++)
1663 scan_config
->channel_array
[j
] = band
->channels
[i
].center_freq
;
1665 cmd
.data
[0] = scan_config
;
1666 cmd
.len
[0] = cmd_size
;
1667 cmd
.dataflags
[0] = IWL_HCMD_DFL_NOCOPY
;
1669 IWL_DEBUG_SCAN(mvm
, "Sending UMAC scan config\n");
1671 ret
= iwl_mvm_send_cmd(mvm
, &cmd
);
1677 static int iwl_mvm_find_scan_uid(struct iwl_mvm
*mvm
, u32 uid
)
1681 for (i
= 0; i
< IWL_MVM_MAX_SIMULTANEOUS_SCANS
; i
++)
1682 if (mvm
->scan_uid
[i
] == uid
)
1688 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm
*mvm
)
1690 return iwl_mvm_find_scan_uid(mvm
, 0);
1693 static bool iwl_mvm_find_scan_type(struct iwl_mvm
*mvm
,
1694 enum iwl_umac_scan_uid_type type
)
1698 for (i
= 0; i
< IWL_MVM_MAX_SIMULTANEOUS_SCANS
; i
++)
1699 if (mvm
->scan_uid
[i
] & type
)
1705 static u32
iwl_generate_scan_uid(struct iwl_mvm
*mvm
,
1706 enum iwl_umac_scan_uid_type type
)
1710 /* make sure exactly one bit is on in scan type */
1711 WARN_ON(hweight8(type
) != 1);
1714 * Make sure scan uids are unique. If one scan lasts long time while
1715 * others are completing frequently, the seq number will wrap up and
1716 * we may have more than one scan with the same uid.
1719 uid
= type
| (mvm
->scan_seq_num
<<
1720 IWL_UMAC_SCAN_UID_SEQ_OFFSET
);
1721 mvm
->scan_seq_num
++;
1722 } while (iwl_mvm_find_scan_uid(mvm
, uid
) <
1723 IWL_MVM_MAX_SIMULTANEOUS_SCANS
);
1725 IWL_DEBUG_SCAN(mvm
, "Generated scan UID %u\n", uid
);
1731 iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm
*mvm
,
1732 struct iwl_scan_req_umac
*cmd
,
1733 struct iwl_mvm_scan_params
*params
)
1735 memset(cmd
, 0, ksize(cmd
));
1736 cmd
->hdr
.size
= cpu_to_le16(iwl_mvm_scan_size(mvm
) -
1737 sizeof(struct iwl_mvm_umac_cmd_hdr
));
1738 cmd
->active_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].active
;
1739 cmd
->passive_dwell
= params
->dwell
[IEEE80211_BAND_2GHZ
].passive
;
1740 if (params
->passive_fragmented
)
1741 cmd
->fragmented_dwell
=
1742 params
->dwell
[IEEE80211_BAND_2GHZ
].passive
;
1743 cmd
->max_out_time
= cpu_to_le32(params
->max_out_time
);
1744 cmd
->suspend_time
= cpu_to_le32(params
->suspend_time
);
1745 cmd
->scan_priority
= cpu_to_le32(IWL_SCAN_PRIORITY_HIGH
);
1749 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm
*mvm
,
1750 struct ieee80211_channel
**channels
,
1751 int n_channels
, u32 ssid_bitmap
,
1752 struct iwl_scan_req_umac
*cmd
)
1754 struct iwl_scan_channel_cfg_umac
*channel_cfg
= (void *)&cmd
->data
;
1757 for (i
= 0; i
< n_channels
; i
++) {
1758 channel_cfg
[i
].flags
= cpu_to_le32(ssid_bitmap
);
1759 channel_cfg
[i
].channel_num
= channels
[i
]->hw_value
;
1760 channel_cfg
[i
].iter_count
= 1;
1761 channel_cfg
[i
].iter_interval
= 0;
1765 static u32
iwl_mvm_scan_umac_common_flags(struct iwl_mvm
*mvm
, int n_ssids
,
1766 struct cfg80211_ssid
*ssids
,
1772 flags
= IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE
;
1774 if (n_ssids
== 1 && ssids
[0].ssid_len
!= 0)
1775 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT
;
1778 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED
;
1780 if (iwl_mvm_rrm_scan_needed(mvm
))
1781 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED
;
1786 int iwl_mvm_scan_umac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1787 struct ieee80211_scan_request
*req
)
1789 struct iwl_host_cmd hcmd
= {
1790 .id
= SCAN_REQ_UMAC
,
1791 .len
= { iwl_mvm_scan_size(mvm
), },
1792 .data
= { mvm
->scan_cmd
, },
1793 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1795 struct iwl_scan_req_umac
*cmd
= mvm
->scan_cmd
;
1796 struct iwl_scan_req_umac_tail
*sec_part
= (void *)&cmd
->data
+
1797 sizeof(struct iwl_scan_channel_cfg_umac
) *
1798 mvm
->fw
->ucode_capa
.n_scan_channels
;
1799 struct iwl_mvm_scan_params params
= {};
1801 u32 ssid_bitmap
= 0;
1802 int ret
, i
, uid_idx
;
1804 lockdep_assert_held(&mvm
->mutex
);
1806 uid_idx
= iwl_mvm_find_free_scan_uid(mvm
);
1807 if (uid_idx
>= IWL_MVM_MAX_SIMULTANEOUS_SCANS
)
1810 /* we should have failed registration if scan_cmd was NULL */
1811 if (WARN_ON(mvm
->scan_cmd
== NULL
))
1814 if (WARN_ON(req
->req
.n_ssids
> PROBE_OPTION_MAX
||
1815 req
->ies
.common_ie_len
+
1816 req
->ies
.len
[NL80211_BAND_2GHZ
] +
1817 req
->ies
.len
[NL80211_BAND_5GHZ
] + 24 + 2 >
1818 SCAN_OFFLOAD_PROBE_REQ_SIZE
|| req
->req
.n_channels
>
1819 mvm
->fw
->ucode_capa
.n_scan_channels
))
1822 iwl_mvm_scan_calc_params(mvm
, vif
, req
->req
.n_ssids
, req
->req
.flags
,
1825 iwl_mvm_build_generic_umac_scan_cmd(mvm
, cmd
, ¶ms
);
1827 uid
= iwl_generate_scan_uid(mvm
, IWL_UMAC_SCAN_UID_REG_SCAN
);
1828 mvm
->scan_uid
[uid_idx
] = uid
;
1829 cmd
->uid
= cpu_to_le32(uid
);
1831 cmd
->ooc_priority
= cpu_to_le32(IWL_SCAN_PRIORITY_HIGH
);
1833 flags
= iwl_mvm_scan_umac_common_flags(mvm
, req
->req
.n_ssids
,
1835 params
.passive_fragmented
);
1837 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL
;
1839 cmd
->general_flags
= cpu_to_le32(flags
);
1840 cmd
->n_channels
= req
->req
.n_channels
;
1842 for (i
= 0; i
< req
->req
.n_ssids
; i
++)
1843 ssid_bitmap
|= BIT(i
);
1845 iwl_mvm_umac_scan_cfg_channels(mvm
, req
->req
.channels
,
1846 req
->req
.n_channels
, ssid_bitmap
, cmd
);
1848 sec_part
->schedule
[0].iter_count
= 1;
1849 sec_part
->delay
= 0;
1851 iwl_mvm_build_unified_scan_probe(mvm
, vif
, &req
->ies
, &sec_part
->preq
,
1852 req
->req
.flags
& NL80211_SCAN_FLAG_RANDOM_ADDR
?
1853 req
->req
.mac_addr
: NULL
,
1854 req
->req
.mac_addr_mask
);
1856 iwl_mvm_scan_fill_ssids(sec_part
->direct_scan
, req
->req
.ssids
,
1857 req
->req
.n_ssids
, 0);
1859 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1862 "Scan request was sent successfully\n");
1865 * If the scan failed, it usually means that the FW was unable
1866 * to allocate the time events. Warn on it, but maybe we
1867 * should try to send the command again with different params.
1869 IWL_ERR(mvm
, "Scan failed! ret %d\n", ret
);
1874 int iwl_mvm_sched_scan_umac(struct iwl_mvm
*mvm
, struct ieee80211_vif
*vif
,
1875 struct cfg80211_sched_scan_request
*req
,
1876 struct ieee80211_scan_ies
*ies
)
1879 struct iwl_host_cmd hcmd
= {
1880 .id
= SCAN_REQ_UMAC
,
1881 .len
= { iwl_mvm_scan_size(mvm
), },
1882 .data
= { mvm
->scan_cmd
, },
1883 .dataflags
= { IWL_HCMD_DFL_NOCOPY
, },
1885 struct iwl_scan_req_umac
*cmd
= mvm
->scan_cmd
;
1886 struct iwl_scan_req_umac_tail
*sec_part
= (void *)&cmd
->data
+
1887 sizeof(struct iwl_scan_channel_cfg_umac
) *
1888 mvm
->fw
->ucode_capa
.n_scan_channels
;
1889 struct iwl_mvm_scan_params params
= {};
1891 u32 ssid_bitmap
= 0;
1894 lockdep_assert_held(&mvm
->mutex
);
1896 uid_idx
= iwl_mvm_find_free_scan_uid(mvm
);
1897 if (uid_idx
>= IWL_MVM_MAX_SIMULTANEOUS_SCANS
)
1900 /* we should have failed registration if scan_cmd was NULL */
1901 if (WARN_ON(mvm
->scan_cmd
== NULL
))
1904 if (WARN_ON(req
->n_ssids
> PROBE_OPTION_MAX
||
1905 ies
->common_ie_len
+ ies
->len
[NL80211_BAND_2GHZ
] +
1906 ies
->len
[NL80211_BAND_5GHZ
] + 24 + 2 >
1907 SCAN_OFFLOAD_PROBE_REQ_SIZE
|| req
->n_channels
>
1908 mvm
->fw
->ucode_capa
.n_scan_channels
))
1911 iwl_mvm_scan_calc_params(mvm
, vif
, req
->n_ssids
, req
->flags
,
1914 iwl_mvm_build_generic_umac_scan_cmd(mvm
, cmd
, ¶ms
);
1916 cmd
->flags
= cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE
);
1918 uid
= iwl_generate_scan_uid(mvm
, IWL_UMAC_SCAN_UID_SCHED_SCAN
);
1919 mvm
->scan_uid
[uid_idx
] = uid
;
1920 cmd
->uid
= cpu_to_le32(uid
);
1922 cmd
->ooc_priority
= cpu_to_le32(IWL_SCAN_PRIORITY_LOW
);
1924 flags
= iwl_mvm_scan_umac_common_flags(mvm
, req
->n_ssids
, req
->ssids
,
1925 params
.passive_fragmented
);
1927 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC
;
1929 if (iwl_mvm_scan_pass_all(mvm
, req
))
1930 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL
;
1932 flags
|= IWL_UMAC_SCAN_GEN_FLAGS_MATCH
;
1934 cmd
->general_flags
= cpu_to_le32(flags
);
1936 if (mvm
->fw
->ucode_capa
.flags
& IWL_UCODE_TLV_FLAGS_EBS_SUPPORT
&&
1937 mvm
->last_ebs_successful
)
1938 cmd
->channel_flags
= IWL_SCAN_CHANNEL_FLAG_EBS
|
1939 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE
|
1940 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD
;
1942 cmd
->n_channels
= req
->n_channels
;
1944 iwl_scan_offload_build_ssid(req
, sec_part
->direct_scan
, &ssid_bitmap
,
1947 /* This API uses bits 0-19 instead of 1-20. */
1948 ssid_bitmap
= ssid_bitmap
>> 1;
1950 iwl_mvm_umac_scan_cfg_channels(mvm
, req
->channels
, req
->n_channels
,
1953 sec_part
->schedule
[0].interval
=
1954 cpu_to_le16(req
->interval
/ MSEC_PER_SEC
);
1955 sec_part
->schedule
[0].iter_count
= 0xff;
1957 sec_part
->delay
= 0;
1959 iwl_mvm_build_unified_scan_probe(mvm
, vif
, ies
, &sec_part
->preq
,
1960 req
->flags
& NL80211_SCAN_FLAG_RANDOM_ADDR
?
1961 req
->mac_addr
: NULL
,
1962 req
->mac_addr_mask
);
1964 ret
= iwl_mvm_send_cmd(mvm
, &hcmd
);
1967 "Sched scan request was sent successfully\n");
1970 * If the scan failed, it usually means that the FW was unable
1971 * to allocate the time events. Warn on it, but maybe we
1972 * should try to send the command again with different params.
1974 IWL_ERR(mvm
, "Sched scan failed! ret %d\n", ret
);
1979 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm
*mvm
,
1980 struct iwl_rx_cmd_buffer
*rxb
,
1981 struct iwl_device_cmd
*cmd
)
1983 struct iwl_rx_packet
*pkt
= rxb_addr(rxb
);
1984 struct iwl_umac_scan_complete
*notif
= (void *)pkt
->data
;
1985 u32 uid
= __le32_to_cpu(notif
->uid
);
1986 bool sched
= !!(uid
& IWL_UMAC_SCAN_UID_SCHED_SCAN
);
1987 int uid_idx
= iwl_mvm_find_scan_uid(mvm
, uid
);
1990 * Scan uid may be set to zero in case of scan abort request from above.
1992 if (uid_idx
>= IWL_MVM_MAX_SIMULTANEOUS_SCANS
)
1996 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
1997 uid
, sched
? "sched" : "regular",
1998 notif
->status
== IWL_SCAN_OFFLOAD_COMPLETED
?
1999 "completed" : "aborted",
2000 notif
->ebs_status
== IWL_SCAN_EBS_SUCCESS
?
2001 "success" : "failed");
2003 mvm
->last_ebs_successful
= !notif
->ebs_status
;
2004 mvm
->scan_uid
[uid_idx
] = 0;
2007 ieee80211_scan_completed(mvm
->hw
,
2009 IWL_SCAN_OFFLOAD_ABORTED
);
2010 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
2011 } else if (!iwl_mvm_find_scan_type(mvm
, IWL_UMAC_SCAN_UID_SCHED_SCAN
)) {
2012 ieee80211_sched_scan_stopped(mvm
->hw
);
2014 IWL_DEBUG_SCAN(mvm
, "Another sched scan is running\n");
2020 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data
*notif_wait
,
2021 struct iwl_rx_packet
*pkt
, void *data
)
2023 struct iwl_umac_scan_done
*scan_done
= data
;
2024 struct iwl_umac_scan_complete
*notif
= (void *)pkt
->data
;
2025 u32 uid
= __le32_to_cpu(notif
->uid
);
2026 int uid_idx
= iwl_mvm_find_scan_uid(scan_done
->mvm
, uid
);
2028 if (WARN_ON(pkt
->hdr
.cmd
!= SCAN_COMPLETE_UMAC
))
2031 if (uid_idx
>= IWL_MVM_MAX_SIMULTANEOUS_SCANS
)
2035 * Clear scan uid of scans that was aborted from above and completed
2036 * in FW so the RX handler does nothing.
2038 scan_done
->mvm
->scan_uid
[uid_idx
] = 0;
2040 return !iwl_mvm_find_scan_type(scan_done
->mvm
, scan_done
->type
);
2043 static int iwl_umac_scan_abort_one(struct iwl_mvm
*mvm
, u32 uid
)
2045 struct iwl_umac_scan_abort cmd
= {
2046 .hdr
.size
= cpu_to_le16(sizeof(struct iwl_umac_scan_abort
) -
2047 sizeof(struct iwl_mvm_umac_cmd_hdr
)),
2048 .uid
= cpu_to_le32(uid
),
2051 lockdep_assert_held(&mvm
->mutex
);
2053 IWL_DEBUG_SCAN(mvm
, "Sending scan abort, uid %u\n", uid
);
2055 return iwl_mvm_send_cmd_pdu(mvm
, SCAN_ABORT_UMAC
, 0, sizeof(cmd
), &cmd
);
2058 static int iwl_umac_scan_stop(struct iwl_mvm
*mvm
,
2059 enum iwl_umac_scan_uid_type type
, bool notify
)
2061 struct iwl_notification_wait wait_scan_done
;
2062 static const u8 scan_done_notif
[] = { SCAN_COMPLETE_UMAC
, };
2063 struct iwl_umac_scan_done scan_done
= {
2069 iwl_init_notification_wait(&mvm
->notif_wait
, &wait_scan_done
,
2071 ARRAY_SIZE(scan_done_notif
),
2072 iwl_scan_umac_done_check
, &scan_done
);
2074 IWL_DEBUG_SCAN(mvm
, "Preparing to stop scan, type %x\n", type
);
2076 for (i
= 0; i
< IWL_MVM_MAX_SIMULTANEOUS_SCANS
; i
++) {
2077 if (mvm
->scan_uid
[i
] & type
) {
2080 if (iwl_mvm_is_radio_killed(mvm
) &&
2081 (type
& IWL_UMAC_SCAN_UID_REG_SCAN
)) {
2082 ieee80211_scan_completed(mvm
->hw
, true);
2083 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
2087 err
= iwl_umac_scan_abort_one(mvm
, mvm
->scan_uid
[i
]);
2094 IWL_DEBUG_SCAN(mvm
, "Couldn't stop scan\n");
2095 iwl_remove_notification(&mvm
->notif_wait
, &wait_scan_done
);
2099 ret
= iwl_wait_notification(&mvm
->notif_wait
, &wait_scan_done
, 1 * HZ
);
2104 if (type
& IWL_UMAC_SCAN_UID_SCHED_SCAN
)
2105 ieee80211_sched_scan_stopped(mvm
->hw
);
2106 if (type
& IWL_UMAC_SCAN_UID_REG_SCAN
) {
2107 ieee80211_scan_completed(mvm
->hw
, true);
2108 iwl_mvm_unref(mvm
, IWL_MVM_REF_SCAN
);
2115 int iwl_mvm_scan_size(struct iwl_mvm
*mvm
)
2117 if (mvm
->fw
->ucode_capa
.capa
[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN
)
2118 return sizeof(struct iwl_scan_req_umac
) +
2119 sizeof(struct iwl_scan_channel_cfg_umac
) *
2120 mvm
->fw
->ucode_capa
.n_scan_channels
+
2121 sizeof(struct iwl_scan_req_umac_tail
);
2123 if (mvm
->fw
->ucode_capa
.api
[0] & IWL_UCODE_TLV_API_LMAC_SCAN
)
2124 return sizeof(struct iwl_scan_req_unified_lmac
) +
2125 sizeof(struct iwl_scan_channel_cfg_lmac
) *
2126 mvm
->fw
->ucode_capa
.n_scan_channels
+
2127 sizeof(struct iwl_scan_probe_req
);
2129 return sizeof(struct iwl_scan_cmd
) +
2130 mvm
->fw
->ucode_capa
.max_probe_length
+
2131 mvm
->fw
->ucode_capa
.n_scan_channels
*
2132 sizeof(struct iwl_scan_channel
);