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Merge tag 'pinctrl-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[mirror_ubuntu-zesty-kernel.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65
66 #include <linux/etherdevice.h>
67 #include <net/mac80211.h>
68
69 #include "mvm.h"
70 #include "iwl-eeprom-parse.h"
71 #include "fw-api-scan.h"
72
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
77
78 struct iwl_mvm_scan_params {
79 u32 max_out_time;
80 u32 suspend_time;
81 bool passive_fragmented;
82 struct _dwell {
83 u16 passive;
84 u16 active;
85 } dwell[IEEE80211_NUM_BANDS];
86 };
87
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,
93 };
94
95 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
96 enum iwl_umac_scan_uid_type type, bool notify);
97
98 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
99 {
100 if (mvm->scan_rx_ant != ANT_NONE)
101 return mvm->scan_rx_ant;
102 return iwl_mvm_get_valid_rx_ant(mvm);
103 }
104
105 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
106 {
107 u16 rx_chain;
108 u8 rx_ant;
109
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);
116 }
117
118 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
119 {
120 if (band == IEEE80211_BAND_2GHZ)
121 return cpu_to_le32(PHY_BAND_24);
122 else
123 return cpu_to_le32(PHY_BAND_5);
124 }
125
126 static inline __le32
127 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
128 bool no_cck)
129 {
130 u32 tx_ant;
131
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;
136
137 if (band == IEEE80211_BAND_2GHZ && !no_cck)
138 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
139 tx_ant);
140 else
141 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
142 }
143
144 /*
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
148 * request.
149 */
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)
153 {
154 int fw_idx, req_idx;
155
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,
161 ssids[req_idx].ssid,
162 ssids[req_idx].ssid_len);
163 }
164 }
165
166 /*
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.
175 */
176 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
177 enum ieee80211_band band, int n_ssids)
178 {
179 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
180 return 10;
181 if (band == IEEE80211_BAND_2GHZ)
182 return 20 + 3 * (n_ssids + 1);
183 return 10 + 2 * (n_ssids + 1);
184 }
185
186 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
187 enum ieee80211_band band)
188 {
189 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
190 return 110;
191 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
192 }
193
194 static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd,
195 struct cfg80211_scan_request *req,
196 bool basic_ssid,
197 struct iwl_mvm_scan_params *params)
198 {
199 struct iwl_scan_channel *chan = (struct iwl_scan_channel *)
200 (cmd->data + le16_to_cpu(cmd->tx_cmd.len));
201 int i;
202 int type = BIT(req->n_ssids) - 1;
203 enum ieee80211_band band = req->channels[0]->band;
204
205 if (!basic_ssid)
206 type |= BIT(req->n_ssids);
207
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);
216 chan++;
217 }
218 }
219
220 /*
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.
227 */
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,
232 int left)
233 {
234 int len = 0;
235 u8 *pos = NULL;
236
237 /* Make sure there is enough space for the probe request,
238 * two mandatory IEs and the data */
239 left -= 24;
240 if (left < 0)
241 return 0;
242
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);
247 frame->seq_ctrl = 0;
248
249 len += 24;
250
251 /* for passive scans, no need to fill anything */
252 if (n_ssids == 0)
253 return (u16)len;
254
255 /* points to the payload of the request */
256 pos = &frame->u.probe_req.variable[0];
257
258 /* fill in our SSID IE */
259 left -= ssid_len + 2;
260 if (left < 0)
261 return 0;
262 *pos++ = WLAN_EID_SSID;
263 *pos++ = ssid_len;
264 if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */
265 memcpy(pos, ssid, ssid_len);
266 pos += ssid_len;
267 }
268
269 len += ssid_len + 2;
270
271 if (WARN_ON(left < band_ie_len + common_ie_len))
272 return len;
273
274 if (band_ie && band_ie_len) {
275 memcpy(pos, band_ie, band_ie_len);
276 pos += band_ie_len;
277 len += band_ie_len;
278 }
279
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;
284 }
285
286 return (u16)len;
287 }
288
289 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
290 struct ieee80211_vif *vif)
291 {
292 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
293 int *global_cnt = data;
294
295 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
296 mvmvif->phy_ctxt->id < MAX_PHYS)
297 *global_cnt += 1;
298 }
299
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)
304 {
305 int global_cnt = 0;
306 enum ieee80211_band band;
307 u8 frag_passive_dwell = 0;
308
309 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
310 IEEE80211_IFACE_ITER_NORMAL,
311 iwl_mvm_scan_condition_iterator,
312 &global_cnt);
313
314 if (!global_cnt)
315 goto not_bound;
316
317 params->suspend_time = 30;
318 params->max_out_time = 120;
319
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;
324 /*
325 * If there is more than one active interface make
326 * passive scan more fragmented.
327 */
328 frag_passive_dwell = (global_cnt < 2) ? 40 : 20;
329 params->max_out_time = frag_passive_dwell;
330 } else {
331 params->suspend_time = 120;
332 params->max_out_time = 120;
333 }
334 }
335
336 if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
337 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
338 /*
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
343 */
344 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
345 u32 passive_dwell =
346 iwl_mvm_get_passive_dwell(mvm,
347 IEEE80211_BAND_2GHZ);
348 params->max_out_time = passive_dwell;
349 } else {
350 params->passive_fragmented = true;
351 }
352 }
353
354 if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
355 params->max_out_time = 200;
356
357 not_bound:
358
359 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
360 if (params->passive_fragmented)
361 params->dwell[band].passive = frag_passive_dwell;
362 else
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,
366 n_ssids);
367 }
368 }
369
370 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
371 {
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;
375 }
376
377 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm,
378 bool is_sched_scan)
379 {
380 int max_probe_len;
381
382 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
383 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
384 else
385 max_probe_len = mvm->fw->ucode_capa.max_probe_length;
386
387 /* we create the 802.11 header and SSID element */
388 max_probe_len -= 24 + 2;
389
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) &&
393 !is_sched_scan)
394 max_probe_len -= 32;
395
396 /* DS parameter set element is added on 2.4GHZ band if required */
397 if (iwl_mvm_rrm_scan_needed(mvm))
398 max_probe_len -= 3;
399
400 return max_probe_len;
401 }
402
403 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan)
404 {
405 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan);
406
407 if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN))
408 return max_ie_len;
409
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.
419 */
420 return max_ie_len;
421 }
422
423 int iwl_mvm_scan_request(struct iwl_mvm *mvm,
424 struct ieee80211_vif *vif,
425 struct cfg80211_scan_request *req)
426 {
427 struct iwl_host_cmd hcmd = {
428 .id = SCAN_REQUEST_CMD,
429 .len = { 0, },
430 .data = { mvm->scan_cmd, },
431 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
432 };
433 struct iwl_scan_cmd *cmd = mvm->scan_cmd;
434 int ret;
435 u32 status;
436 int ssid_len = 0;
437 u8 *ssid = NULL;
438 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
439 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
440 struct iwl_mvm_scan_params params = {};
441
442 lockdep_assert_held(&mvm->mutex);
443
444 /* we should have failed registration if scan_cmd was NULL */
445 if (WARN_ON(mvm->scan_cmd == NULL))
446 return -ENOMEM;
447
448 IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
449 mvm->scan_status = IWL_MVM_SCAN_OS;
450 memset(cmd, 0, ksize(cmd));
451
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);
456
457 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, &params);
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;
462
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);
466
467 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
468 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
469 else
470 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
471
472 cmd->repeats = cpu_to_le32(1);
473
474 /*
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.
477 */
478 if (req->n_ssids > 0) {
479 cmd->passive2active = cpu_to_le16(1);
480 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
481 if (basic_ssid) {
482 ssid = req->ssids[0].ssid;
483 ssid_len = req->ssids[0].ssid_len;
484 }
485 } else {
486 cmd->passive2active = 0;
487 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
488 }
489
490 iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids,
491 basic_ssid ? 1 : 0);
492
493 cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
494 3 << TX_CMD_FLG_BT_PRIO_POS);
495
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,
500 req->no_cck);
501
502 cmd->tx_cmd.len =
503 cpu_to_le16(iwl_mvm_fill_probe_req(
504 (struct ieee80211_mgmt *)cmd->data,
505 vif->addr,
506 req->n_ssids, ssid, ssid_len,
507 req->ie, req->ie_len, NULL, 0,
508 mvm->fw->ucode_capa.max_probe_length));
509
510 iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, &params);
511
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);
516
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");
521 } else {
522 /*
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.
526 */
527 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
528 status, ret);
529 mvm->scan_status = IWL_MVM_SCAN_NONE;
530 ret = -EIO;
531 }
532 return ret;
533 }
534
535 int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
536 struct iwl_device_cmd *cmd)
537 {
538 struct iwl_rx_packet *pkt = rxb_addr(rxb);
539 struct iwl_cmd_response *resp = (void *)pkt->data;
540
541 IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
542 le32_to_cpu(resp->status));
543 return 0;
544 }
545
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)
549 {
550 struct iwl_rx_packet *pkt = rxb_addr(rxb);
551 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
552
553 IWL_DEBUG_SCAN(mvm,
554 "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
555 notif->status, notif->scanned_channels);
556 return 0;
557 }
558
559 int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
560 struct iwl_device_cmd *cmd)
561 {
562 struct iwl_rx_packet *pkt = rxb_addr(rxb);
563 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
564
565 lockdep_assert_held(&mvm->mutex);
566
567 IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
568 notif->status, notif->scanned_channels);
569
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);
573
574 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
575
576 return 0;
577 }
578
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)
582 {
583 struct iwl_rx_packet *pkt = rxb_addr(rxb);
584
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;
588
589 if (!(notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN))
590 return 0;
591 }
592
593 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
594 ieee80211_sched_scan_results(mvm->hw);
595
596 return 0;
597 }
598
599 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
600 struct iwl_rx_packet *pkt, void *data)
601 {
602 struct iwl_mvm *mvm =
603 container_of(notif_wait, struct iwl_mvm, notif_wait);
604 struct iwl_scan_complete_notif *notif;
605 u32 *resp;
606
607 switch (pkt->hdr.cmd) {
608 case SCAN_ABORT_CMD:
609 resp = (void *)pkt->data;
610 if (*resp == CAN_ABORT_STATUS) {
611 IWL_DEBUG_SCAN(mvm,
612 "Scan can be aborted, wait until completion\n");
613 return false;
614 }
615
616 /*
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.
620 */
621 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
622 *resp);
623 return true;
624
625 case SCAN_COMPLETE_NOTIFICATION:
626 notif = (void *)pkt->data;
627 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
628 notif->status);
629 return true;
630
631 default:
632 WARN_ON(1);
633 return false;
634 };
635 }
636
637 static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm)
638 {
639 struct iwl_notification_wait wait_scan_abort;
640 static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
641 SCAN_COMPLETE_NOTIFICATION };
642 int ret;
643
644 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
645 scan_abort_notif,
646 ARRAY_SIZE(scan_abort_notif),
647 iwl_mvm_scan_abort_notif, NULL);
648
649 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
650 if (ret) {
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;
654 }
655
656 return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
657
658 out_remove_notif:
659 iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
660 return ret;
661 }
662
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)
666 {
667 struct iwl_rx_packet *pkt = rxb_addr(rxb);
668 u8 status, ebs_status;
669
670 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
671 struct iwl_periodic_scan_complete *scan_notif;
672
673 scan_notif = (void *)pkt->data;
674 status = scan_notif->status;
675 ebs_status = scan_notif->ebs_status;
676 } else {
677 struct iwl_scan_offload_complete *scan_notif;
678
679 scan_notif = (void *)pkt->data;
680 status = scan_notif->status;
681 ebs_status = scan_notif->ebs_status;
682 }
683 /* scan status must be locked for proper checking */
684 lockdep_assert_held(&mvm->mutex);
685
686 IWL_DEBUG_SCAN(mvm,
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");
694
695
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);
705 }
706
707 if (ebs_status)
708 mvm->last_ebs_successful = false;
709
710 return 0;
711 }
712
713 static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
714 struct ieee80211_vif *vif,
715 struct ieee80211_scan_ies *ies,
716 enum ieee80211_band band,
717 struct iwl_tx_cmd *cmd,
718 u8 *data)
719 {
720 u16 cmd_len;
721
722 cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
723 cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
724 cmd->sta_id = mvm->aux_sta.sta_id;
725
726 cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
727
728 cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
729 vif->addr,
730 1, NULL, 0,
731 ies->ies[band], ies->len[band],
732 ies->common_ies, ies->common_ie_len,
733 SCAN_OFFLOAD_PROBE_REQ_SIZE);
734 cmd->len = cpu_to_le16(cmd_len);
735 }
736
737 static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
738 struct ieee80211_vif *vif,
739 struct cfg80211_sched_scan_request *req,
740 struct iwl_scan_offload_cmd *scan,
741 struct iwl_mvm_scan_params *params)
742 {
743 scan->channel_count = req->n_channels;
744 scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
745 scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
746 scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
747 scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
748
749 scan->max_out_time = cpu_to_le32(params->max_out_time);
750 scan->suspend_time = cpu_to_le32(params->suspend_time);
751
752 scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
753 MAC_FILTER_IN_BEACON);
754 scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
755 scan->rep_count = cpu_to_le32(1);
756
757 if (params->passive_fragmented)
758 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
759 }
760
761 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
762 {
763 int i;
764
765 for (i = 0; i < PROBE_OPTION_MAX; i++) {
766 if (!ssid_list[i].len)
767 break;
768 if (ssid_list[i].len == ssid_len &&
769 !memcmp(ssid_list->ssid, ssid, ssid_len))
770 return i;
771 }
772 return -1;
773 }
774
775 static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
776 struct iwl_ssid_ie *direct_scan,
777 u32 *ssid_bitmap, bool basic_ssid)
778 {
779 int i, j;
780 int index;
781
782 /*
783 * copy SSIDs from match list.
784 * iwl_config_sched_scan_profiles() uses the order of these ssids to
785 * config match list.
786 */
787 for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
788 /* skip empty SSID matchsets */
789 if (!req->match_sets[i].ssid.ssid_len)
790 continue;
791 direct_scan[i].id = WLAN_EID_SSID;
792 direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
793 memcpy(direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
794 direct_scan[i].len);
795 }
796
797 /* add SSIDs from scan SSID list */
798 *ssid_bitmap = 0;
799 for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
800 index = iwl_ssid_exist(req->ssids[j].ssid,
801 req->ssids[j].ssid_len,
802 direct_scan);
803 if (index < 0) {
804 if (!req->ssids[j].ssid_len && basic_ssid)
805 continue;
806 direct_scan[i].id = WLAN_EID_SSID;
807 direct_scan[i].len = req->ssids[j].ssid_len;
808 memcpy(direct_scan[i].ssid, req->ssids[j].ssid,
809 direct_scan[i].len);
810 *ssid_bitmap |= BIT(i + 1);
811 i++;
812 } else {
813 *ssid_bitmap |= BIT(index + 1);
814 }
815 }
816 }
817
818 static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
819 struct cfg80211_sched_scan_request *req,
820 u8 *channels_buffer,
821 enum ieee80211_band band,
822 int *head,
823 u32 ssid_bitmap,
824 struct iwl_mvm_scan_params *params)
825 {
826 u32 n_channels = mvm->fw->ucode_capa.n_scan_channels;
827 __le32 *type = (__le32 *)channels_buffer;
828 __le16 *channel_number = (__le16 *)(type + n_channels);
829 __le16 *iter_count = channel_number + n_channels;
830 __le32 *iter_interval = (__le32 *)(iter_count + n_channels);
831 u8 *active_dwell = (u8 *)(iter_interval + n_channels);
832 u8 *passive_dwell = active_dwell + n_channels;
833 int i, index = 0;
834
835 for (i = 0; i < req->n_channels; i++) {
836 struct ieee80211_channel *chan = req->channels[i];
837
838 if (chan->band != band)
839 continue;
840
841 index = *head;
842 (*head)++;
843
844 channel_number[index] = cpu_to_le16(chan->hw_value);
845 active_dwell[index] = params->dwell[band].active;
846 passive_dwell[index] = params->dwell[band].passive;
847
848 iter_count[index] = cpu_to_le16(1);
849 iter_interval[index] = 0;
850
851 if (!(chan->flags & IEEE80211_CHAN_NO_IR))
852 type[index] |=
853 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
854
855 type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL |
856 IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
857
858 if (chan->flags & IEEE80211_CHAN_NO_HT40)
859 type[index] |=
860 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
861
862 /* scan for all SSIDs from req->ssids */
863 type[index] |= cpu_to_le32(ssid_bitmap);
864 }
865 }
866
867 int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
868 struct ieee80211_vif *vif,
869 struct cfg80211_sched_scan_request *req,
870 struct ieee80211_scan_ies *ies)
871 {
872 int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
873 int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
874 int head = 0;
875 u32 ssid_bitmap;
876 int cmd_len;
877 int ret;
878 u8 *probes;
879 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
880 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
881
882 struct iwl_scan_offload_cfg *scan_cfg;
883 struct iwl_host_cmd cmd = {
884 .id = SCAN_OFFLOAD_CONFIG_CMD,
885 };
886 struct iwl_mvm_scan_params params = {};
887
888 lockdep_assert_held(&mvm->mutex);
889
890 cmd_len = sizeof(struct iwl_scan_offload_cfg) +
891 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE +
892 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
893
894 scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
895 if (!scan_cfg)
896 return -ENOMEM;
897
898 probes = scan_cfg->data +
899 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE;
900
901 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
902 iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, &params);
903 scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
904
905 iwl_scan_offload_build_ssid(req, scan_cfg->scan_cmd.direct_scan,
906 &ssid_bitmap, basic_ssid);
907 /* build tx frames for supported bands */
908 if (band_2ghz) {
909 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
910 IEEE80211_BAND_2GHZ,
911 &scan_cfg->scan_cmd.tx_cmd[0],
912 probes);
913 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
914 IEEE80211_BAND_2GHZ, &head,
915 ssid_bitmap, &params);
916 }
917 if (band_5ghz) {
918 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
919 IEEE80211_BAND_5GHZ,
920 &scan_cfg->scan_cmd.tx_cmd[1],
921 probes +
922 SCAN_OFFLOAD_PROBE_REQ_SIZE);
923 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
924 IEEE80211_BAND_5GHZ, &head,
925 ssid_bitmap, &params);
926 }
927
928 cmd.data[0] = scan_cfg;
929 cmd.len[0] = cmd_len;
930 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
931
932 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
933
934 ret = iwl_mvm_send_cmd(mvm, &cmd);
935 kfree(scan_cfg);
936 return ret;
937 }
938
939 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
940 struct cfg80211_sched_scan_request *req)
941 {
942 struct iwl_scan_offload_profile *profile;
943 struct iwl_scan_offload_profile_cfg *profile_cfg;
944 struct iwl_scan_offload_blacklist *blacklist;
945 struct iwl_host_cmd cmd = {
946 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
947 .len[1] = sizeof(*profile_cfg),
948 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
949 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
950 };
951 int blacklist_len;
952 int i;
953 int ret;
954
955 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
956 return -EIO;
957
958 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
959 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
960 else
961 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
962
963 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
964 if (!blacklist)
965 return -ENOMEM;
966
967 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
968 if (!profile_cfg) {
969 ret = -ENOMEM;
970 goto free_blacklist;
971 }
972
973 cmd.data[0] = blacklist;
974 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
975 cmd.data[1] = profile_cfg;
976
977 /* No blacklist configuration */
978
979 profile_cfg->num_profiles = req->n_match_sets;
980 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
981 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
982 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
983 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
984 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
985
986 for (i = 0; i < req->n_match_sets; i++) {
987 profile = &profile_cfg->profiles[i];
988 profile->ssid_index = i;
989 /* Support any cipher and auth algorithm */
990 profile->unicast_cipher = 0xff;
991 profile->auth_alg = 0xff;
992 profile->network_type = IWL_NETWORK_TYPE_ANY;
993 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
994 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
995 }
996
997 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
998
999 ret = iwl_mvm_send_cmd(mvm, &cmd);
1000 kfree(profile_cfg);
1001 free_blacklist:
1002 kfree(blacklist);
1003
1004 return ret;
1005 }
1006
1007 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
1008 struct cfg80211_sched_scan_request *req)
1009 {
1010 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
1011 IWL_DEBUG_SCAN(mvm,
1012 "Sending scheduled scan with filtering, n_match_sets %d\n",
1013 req->n_match_sets);
1014 return false;
1015 }
1016
1017 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
1018 return true;
1019 }
1020
1021 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1022 struct cfg80211_sched_scan_request *req)
1023 {
1024 struct iwl_scan_offload_req scan_req = {
1025 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
1026
1027 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
1028 .schedule_line[0].delay = cpu_to_le16(req->interval / 1000),
1029 .schedule_line[0].full_scan_mul = 1,
1030
1031 .schedule_line[1].iterations = 0xff,
1032 .schedule_line[1].delay = cpu_to_le16(req->interval / 1000),
1033 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
1034 };
1035
1036 if (iwl_mvm_scan_pass_all(mvm, req))
1037 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
1038
1039 if (mvm->last_ebs_successful &&
1040 mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
1041 scan_req.flags |=
1042 cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
1043
1044 return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
1045 sizeof(scan_req), &scan_req);
1046 }
1047
1048 int iwl_mvm_scan_offload_start(struct iwl_mvm *mvm,
1049 struct ieee80211_vif *vif,
1050 struct cfg80211_sched_scan_request *req,
1051 struct ieee80211_scan_ies *ies)
1052 {
1053 int ret;
1054
1055 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1056 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1057 if (ret)
1058 return ret;
1059 ret = iwl_mvm_sched_scan_umac(mvm, vif, req, ies);
1060 } else if ((mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
1061 mvm->scan_status = IWL_MVM_SCAN_SCHED;
1062 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1063 if (ret)
1064 return ret;
1065 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
1066 } else {
1067 mvm->scan_status = IWL_MVM_SCAN_SCHED;
1068 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1069 if (ret)
1070 return ret;
1071 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1072 if (ret)
1073 return ret;
1074 ret = iwl_mvm_sched_scan_start(mvm, req);
1075 }
1076
1077 return ret;
1078 }
1079
1080 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
1081 {
1082 int ret;
1083 struct iwl_host_cmd cmd = {
1084 .id = SCAN_OFFLOAD_ABORT_CMD,
1085 };
1086 u32 status;
1087
1088 /* Exit instantly with error when device is not ready
1089 * to receive scan abort command or it does not perform
1090 * scheduled scan currently */
1091 if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1092 (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1093 mvm->scan_status != IWL_MVM_SCAN_OS))
1094 return -EIO;
1095
1096 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
1097 if (ret)
1098 return ret;
1099
1100 if (status != CAN_ABORT_STATUS) {
1101 /*
1102 * The scan abort will return 1 for success or
1103 * 2 for "failure". A failure condition can be
1104 * due to simply not being in an active scan which
1105 * can occur if we send the scan abort before the
1106 * microcode has notified us that a scan is completed.
1107 */
1108 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
1109 ret = -ENOENT;
1110 }
1111
1112 return ret;
1113 }
1114
1115 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
1116 {
1117 int ret;
1118 struct iwl_notification_wait wait_scan_done;
1119 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
1120 bool sched = mvm->scan_status == IWL_MVM_SCAN_SCHED;
1121
1122 lockdep_assert_held(&mvm->mutex);
1123
1124 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1125 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
1126 notify);
1127
1128 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1129 return 0;
1130
1131 if (iwl_mvm_is_radio_killed(mvm)) {
1132 ret = 0;
1133 goto out;
1134 }
1135
1136 if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1137 (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1138 mvm->scan_status != IWL_MVM_SCAN_OS)) {
1139 IWL_DEBUG_SCAN(mvm, "No scan to stop\n");
1140 return 0;
1141 }
1142
1143 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1144 scan_done_notif,
1145 ARRAY_SIZE(scan_done_notif),
1146 NULL, NULL);
1147
1148 ret = iwl_mvm_send_scan_offload_abort(mvm);
1149 if (ret) {
1150 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
1151 sched ? "offloaded " : "", ret);
1152 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1153 goto out;
1154 }
1155
1156 IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
1157 sched ? "offloaded " : "");
1158
1159 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1160 out:
1161 /*
1162 * Clear the scan status so the next scan requests will succeed. This
1163 * also ensures the Rx handler doesn't do anything, as the scan was
1164 * stopped from above. Since the rx handler won't do anything now,
1165 * we have to release the scan reference here.
1166 */
1167 if (mvm->scan_status == IWL_MVM_SCAN_OS)
1168 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1169
1170 mvm->scan_status = IWL_MVM_SCAN_NONE;
1171
1172 if (notify) {
1173 if (sched)
1174 ieee80211_sched_scan_stopped(mvm->hw);
1175 else
1176 ieee80211_scan_completed(mvm->hw, true);
1177 }
1178
1179 return ret;
1180 }
1181
1182 static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm *mvm,
1183 struct iwl_scan_req_tx_cmd *tx_cmd,
1184 bool no_cck)
1185 {
1186 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1187 TX_CMD_FLG_BT_DIS);
1188 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1189 IEEE80211_BAND_2GHZ,
1190 no_cck);
1191 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
1192
1193 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1194 TX_CMD_FLG_BT_DIS);
1195 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1196 IEEE80211_BAND_5GHZ,
1197 no_cck);
1198 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
1199 }
1200
1201 static void
1202 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
1203 struct ieee80211_channel **channels,
1204 int n_channels, u32 ssid_bitmap,
1205 struct iwl_scan_req_unified_lmac *cmd)
1206 {
1207 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
1208 int i;
1209
1210 for (i = 0; i < n_channels; i++) {
1211 channel_cfg[i].channel_num =
1212 cpu_to_le16(channels[i]->hw_value);
1213 channel_cfg[i].iter_count = cpu_to_le16(1);
1214 channel_cfg[i].iter_interval = 0;
1215 channel_cfg[i].flags =
1216 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
1217 ssid_bitmap);
1218 }
1219 }
1220
1221 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
1222 size_t len, u8 *const pos)
1223 {
1224 static const u8 before_ds_params[] = {
1225 WLAN_EID_SSID,
1226 WLAN_EID_SUPP_RATES,
1227 WLAN_EID_REQUEST,
1228 WLAN_EID_EXT_SUPP_RATES,
1229 };
1230 size_t offs;
1231 u8 *newpos = pos;
1232
1233 if (!iwl_mvm_rrm_scan_needed(mvm)) {
1234 memcpy(newpos, ies, len);
1235 return newpos + len;
1236 }
1237
1238 offs = ieee80211_ie_split(ies, len,
1239 before_ds_params,
1240 ARRAY_SIZE(before_ds_params),
1241 0);
1242
1243 memcpy(newpos, ies, offs);
1244 newpos += offs;
1245
1246 /* Add a placeholder for DS Parameter Set element */
1247 *newpos++ = WLAN_EID_DS_PARAMS;
1248 *newpos++ = 1;
1249 *newpos++ = 0;
1250
1251 memcpy(newpos, ies + offs, len - offs);
1252 newpos += len - offs;
1253
1254 return newpos;
1255 }
1256
1257 static void
1258 iwl_mvm_build_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1259 struct ieee80211_scan_ies *ies,
1260 struct iwl_scan_probe_req *preq,
1261 const u8 *mac_addr, const u8 *mac_addr_mask)
1262 {
1263 struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
1264 u8 *pos, *newpos;
1265
1266 /*
1267 * Unfortunately, right now the offload scan doesn't support randomising
1268 * within the firmware, so until the firmware API is ready we implement
1269 * it in the driver. This means that the scan iterations won't really be
1270 * random, only when it's restarted, but at least that helps a bit.
1271 */
1272 if (mac_addr)
1273 get_random_mask_addr(frame->sa, mac_addr, mac_addr_mask);
1274 else
1275 memcpy(frame->sa, vif->addr, ETH_ALEN);
1276
1277 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1278 eth_broadcast_addr(frame->da);
1279 eth_broadcast_addr(frame->bssid);
1280 frame->seq_ctrl = 0;
1281
1282 pos = frame->u.probe_req.variable;
1283 *pos++ = WLAN_EID_SSID;
1284 *pos++ = 0;
1285
1286 preq->mac_header.offset = 0;
1287 preq->mac_header.len = cpu_to_le16(24 + 2);
1288
1289 /* Insert ds parameter set element on 2.4 GHz band */
1290 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
1291 ies->ies[IEEE80211_BAND_2GHZ],
1292 ies->len[IEEE80211_BAND_2GHZ],
1293 pos);
1294 preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
1295 preq->band_data[0].len = cpu_to_le16(newpos - pos);
1296 pos = newpos;
1297
1298 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
1299 ies->len[IEEE80211_BAND_5GHZ]);
1300 preq->band_data[1].offset = cpu_to_le16(pos - preq->buf);
1301 preq->band_data[1].len = cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
1302 pos += ies->len[IEEE80211_BAND_5GHZ];
1303
1304 memcpy(pos, ies->common_ies, ies->common_ie_len);
1305 preq->common_data.offset = cpu_to_le16(pos - preq->buf);
1306 preq->common_data.len = cpu_to_le16(ies->common_ie_len);
1307 }
1308
1309 static void
1310 iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
1311 struct iwl_scan_req_unified_lmac *cmd,
1312 struct iwl_mvm_scan_params *params)
1313 {
1314 memset(cmd, 0, ksize(cmd));
1315 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1316 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1317 if (params->passive_fragmented)
1318 cmd->fragmented_dwell =
1319 params->dwell[IEEE80211_BAND_2GHZ].passive;
1320 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
1321 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1322 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1323 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1324 cmd->iter_num = cpu_to_le32(1);
1325
1326 if (iwl_mvm_rrm_scan_needed(mvm))
1327 cmd->scan_flags |=
1328 cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
1329 }
1330
1331 int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
1332 struct ieee80211_vif *vif,
1333 struct ieee80211_scan_request *req)
1334 {
1335 struct iwl_host_cmd hcmd = {
1336 .id = SCAN_OFFLOAD_REQUEST_CMD,
1337 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1338 sizeof(struct iwl_scan_channel_cfg_lmac) *
1339 mvm->fw->ucode_capa.n_scan_channels +
1340 sizeof(struct iwl_scan_probe_req), },
1341 .data = { mvm->scan_cmd, },
1342 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1343 };
1344 struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1345 struct iwl_scan_probe_req *preq;
1346 struct iwl_mvm_scan_params params = {};
1347 u32 flags;
1348 u32 ssid_bitmap = 0;
1349 int ret, i;
1350
1351 lockdep_assert_held(&mvm->mutex);
1352
1353 /* we should have failed registration if scan_cmd was NULL */
1354 if (WARN_ON(mvm->scan_cmd == NULL))
1355 return -ENOMEM;
1356
1357 if (req->req.n_ssids > PROBE_OPTION_MAX ||
1358 req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] +
1359 req->ies.len[NL80211_BAND_5GHZ] >
1360 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) ||
1361 req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
1362 return -ENOBUFS;
1363
1364 mvm->scan_status = IWL_MVM_SCAN_OS;
1365
1366 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1367 &params);
1368
1369 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1370
1371 cmd->n_channels = (u8)req->req.n_channels;
1372
1373 flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1374
1375 if (req->req.n_ssids == 1 && req->req.ssids[0].ssid_len != 0)
1376 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1377
1378 if (params.passive_fragmented)
1379 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1380
1381 if (req->req.n_ssids == 0)
1382 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1383
1384 cmd->scan_flags |= cpu_to_le32(flags);
1385
1386 cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band);
1387 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1388 MAC_FILTER_IN_BEACON);
1389 iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, req->req.no_cck);
1390 iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->req.ssids,
1391 req->req.n_ssids, 0);
1392
1393 cmd->schedule[0].delay = 0;
1394 cmd->schedule[0].iterations = 1;
1395 cmd->schedule[0].full_scan_mul = 0;
1396 cmd->schedule[1].delay = 0;
1397 cmd->schedule[1].iterations = 0;
1398 cmd->schedule[1].full_scan_mul = 0;
1399
1400 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
1401 mvm->last_ebs_successful) {
1402 cmd->channel_opt[0].flags =
1403 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1404 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1405 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1406 cmd->channel_opt[0].non_ebs_ratio =
1407 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
1408 cmd->channel_opt[1].flags =
1409 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1410 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1411 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1412 cmd->channel_opt[1].non_ebs_ratio =
1413 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1414 }
1415
1416 for (i = 1; i <= req->req.n_ssids; i++)
1417 ssid_bitmap |= BIT(i);
1418
1419 iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels,
1420 req->req.n_channels, ssid_bitmap,
1421 cmd);
1422
1423 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1424 mvm->fw->ucode_capa.n_scan_channels);
1425
1426 iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, preq,
1427 req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1428 req->req.mac_addr : NULL,
1429 req->req.mac_addr_mask);
1430
1431 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1432 if (!ret) {
1433 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1434 } else {
1435 /*
1436 * If the scan failed, it usually means that the FW was unable
1437 * to allocate the time events. Warn on it, but maybe we
1438 * should try to send the command again with different params.
1439 */
1440 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1441 mvm->scan_status = IWL_MVM_SCAN_NONE;
1442 ret = -EIO;
1443 }
1444 return ret;
1445 }
1446
1447 int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
1448 struct ieee80211_vif *vif,
1449 struct cfg80211_sched_scan_request *req,
1450 struct ieee80211_scan_ies *ies)
1451 {
1452 struct iwl_host_cmd hcmd = {
1453 .id = SCAN_OFFLOAD_REQUEST_CMD,
1454 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1455 sizeof(struct iwl_scan_channel_cfg_lmac) *
1456 mvm->fw->ucode_capa.n_scan_channels +
1457 sizeof(struct iwl_scan_probe_req), },
1458 .data = { mvm->scan_cmd, },
1459 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1460 };
1461 struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1462 struct iwl_scan_probe_req *preq;
1463 struct iwl_mvm_scan_params params = {};
1464 int ret;
1465 u32 flags = 0, ssid_bitmap = 0;
1466
1467 lockdep_assert_held(&mvm->mutex);
1468
1469 /* we should have failed registration if scan_cmd was NULL */
1470 if (WARN_ON(mvm->scan_cmd == NULL))
1471 return -ENOMEM;
1472
1473 if (req->n_ssids > PROBE_OPTION_MAX ||
1474 ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1475 ies->len[NL80211_BAND_5GHZ] >
1476 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) ||
1477 req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1478 return -ENOBUFS;
1479
1480 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
1481
1482 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1483
1484 cmd->n_channels = (u8)req->n_channels;
1485
1486 if (iwl_mvm_scan_pass_all(mvm, req))
1487 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1488 else
1489 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
1490
1491 if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0)
1492 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1493
1494 if (params.passive_fragmented)
1495 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1496
1497 if (req->n_ssids == 0)
1498 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1499
1500 #ifdef CONFIG_IWLWIFI_DEBUGFS
1501 if (mvm->scan_iter_notif_enabled)
1502 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
1503 #endif
1504
1505 cmd->scan_flags |= cpu_to_le32(flags);
1506
1507 cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
1508 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1509 MAC_FILTER_IN_BEACON);
1510 iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, false);
1511 iwl_scan_offload_build_ssid(req, cmd->direct_scan, &ssid_bitmap, false);
1512
1513 cmd->schedule[0].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1514 cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1515 cmd->schedule[0].full_scan_mul = 1;
1516
1517 cmd->schedule[1].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1518 cmd->schedule[1].iterations = 0xff;
1519 cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1520
1521 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1522 mvm->last_ebs_successful) {
1523 cmd->channel_opt[0].flags =
1524 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1525 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1526 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1527 cmd->channel_opt[0].non_ebs_ratio =
1528 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
1529 cmd->channel_opt[1].flags =
1530 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1531 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1532 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1533 cmd->channel_opt[1].non_ebs_ratio =
1534 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1535 }
1536
1537 iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1538 ssid_bitmap, cmd);
1539
1540 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1541 mvm->fw->ucode_capa.n_scan_channels);
1542
1543 iwl_mvm_build_unified_scan_probe(mvm, vif, ies, preq,
1544 req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1545 req->mac_addr : NULL,
1546 req->mac_addr_mask);
1547
1548 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1549 if (!ret) {
1550 IWL_DEBUG_SCAN(mvm,
1551 "Sched scan request was sent successfully\n");
1552 } else {
1553 /*
1554 * If the scan failed, it usually means that the FW was unable
1555 * to allocate the time events. Warn on it, but maybe we
1556 * should try to send the command again with different params.
1557 */
1558 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1559 mvm->scan_status = IWL_MVM_SCAN_NONE;
1560 ret = -EIO;
1561 }
1562 return ret;
1563 }
1564
1565
1566 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
1567 {
1568 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1569 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN,
1570 true);
1571
1572 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1573 return 0;
1574
1575 if (iwl_mvm_is_radio_killed(mvm)) {
1576 ieee80211_scan_completed(mvm->hw, true);
1577 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1578 mvm->scan_status = IWL_MVM_SCAN_NONE;
1579 return 0;
1580 }
1581
1582 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1583 return iwl_mvm_scan_offload_stop(mvm, true);
1584 return iwl_mvm_cancel_regular_scan(mvm);
1585 }
1586
1587 /* UMAC scan API */
1588
1589 struct iwl_umac_scan_done {
1590 struct iwl_mvm *mvm;
1591 enum iwl_umac_scan_uid_type type;
1592 };
1593
1594 static int rate_to_scan_rate_flag(unsigned int rate)
1595 {
1596 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1597 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
1598 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
1599 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
1600 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
1601 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
1602 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
1603 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
1604 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
1605 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
1606 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
1607 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
1608 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
1609 };
1610
1611 return rate_to_scan_rate[rate];
1612 }
1613
1614 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1615 {
1616 struct ieee80211_supported_band *band;
1617 unsigned int rates = 0;
1618 int i;
1619
1620 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1621 for (i = 0; i < band->n_bitrates; i++)
1622 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1623 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1624 for (i = 0; i < band->n_bitrates; i++)
1625 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1626
1627 /* Set both basic rates and supported rates */
1628 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1629
1630 return cpu_to_le32(rates);
1631 }
1632
1633 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1634 {
1635
1636 struct iwl_scan_config *scan_config;
1637 struct ieee80211_supported_band *band;
1638 int num_channels =
1639 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
1640 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
1641 int ret, i, j = 0, cmd_size, data_size;
1642 struct iwl_host_cmd cmd = {
1643 .id = SCAN_CFG_CMD,
1644 };
1645
1646 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1647 return -ENOBUFS;
1648
1649 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
1650
1651 scan_config = kzalloc(cmd_size, GFP_KERNEL);
1652 if (!scan_config)
1653 return -ENOMEM;
1654
1655 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
1656 scan_config->hdr.size = cpu_to_le16(data_size);
1657 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
1658 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1659 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1660 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1661 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1662 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1663 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1664 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
1665 SCAN_CONFIG_N_CHANNELS(num_channels));
1666 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1667 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1668 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1669 scan_config->out_of_channel_time = cpu_to_le32(170);
1670 scan_config->suspend_time = cpu_to_le32(30);
1671 scan_config->dwell_active = 20;
1672 scan_config->dwell_passive = 110;
1673 scan_config->dwell_fragmented = 20;
1674
1675 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1676
1677 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1678 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1679 IWL_CHANNEL_FLAG_ACCURATE_EBS |
1680 IWL_CHANNEL_FLAG_EBS_ADD |
1681 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1682
1683 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1684 for (i = 0; i < band->n_channels; i++, j++)
1685 scan_config->channel_array[j] = band->channels[i].hw_value;
1686 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1687 for (i = 0; i < band->n_channels; i++, j++)
1688 scan_config->channel_array[j] = band->channels[i].hw_value;
1689
1690 cmd.data[0] = scan_config;
1691 cmd.len[0] = cmd_size;
1692 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1693
1694 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1695
1696 ret = iwl_mvm_send_cmd(mvm, &cmd);
1697
1698 kfree(scan_config);
1699 return ret;
1700 }
1701
1702 static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1703 {
1704 int i;
1705
1706 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1707 if (mvm->scan_uid[i] == uid)
1708 return i;
1709
1710 return i;
1711 }
1712
1713 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1714 {
1715 return iwl_mvm_find_scan_uid(mvm, 0);
1716 }
1717
1718 static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm,
1719 enum iwl_umac_scan_uid_type type)
1720 {
1721 int i;
1722
1723 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1724 if (mvm->scan_uid[i] & type)
1725 return true;
1726
1727 return false;
1728 }
1729
1730 static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm,
1731 enum iwl_umac_scan_uid_type type)
1732 {
1733 u32 uid;
1734
1735 /* make sure exactly one bit is on in scan type */
1736 WARN_ON(hweight8(type) != 1);
1737
1738 /*
1739 * Make sure scan uids are unique. If one scan lasts long time while
1740 * others are completing frequently, the seq number will wrap up and
1741 * we may have more than one scan with the same uid.
1742 */
1743 do {
1744 uid = type | (mvm->scan_seq_num <<
1745 IWL_UMAC_SCAN_UID_SEQ_OFFSET);
1746 mvm->scan_seq_num++;
1747 } while (iwl_mvm_find_scan_uid(mvm, uid) <
1748 IWL_MVM_MAX_SIMULTANEOUS_SCANS);
1749
1750 IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
1751
1752 return uid;
1753 }
1754
1755 static void
1756 iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm *mvm,
1757 struct iwl_scan_req_umac *cmd,
1758 struct iwl_mvm_scan_params *params)
1759 {
1760 memset(cmd, 0, ksize(cmd));
1761 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1762 sizeof(struct iwl_mvm_umac_cmd_hdr));
1763 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1764 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1765 if (params->passive_fragmented)
1766 cmd->fragmented_dwell =
1767 params->dwell[IEEE80211_BAND_2GHZ].passive;
1768 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1769 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1770 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1771 }
1772
1773 static void
1774 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1775 struct ieee80211_channel **channels,
1776 int n_channels, u32 ssid_bitmap,
1777 struct iwl_scan_req_umac *cmd)
1778 {
1779 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1780 int i;
1781
1782 for (i = 0; i < n_channels; i++) {
1783 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1784 channel_cfg[i].channel_num = channels[i]->hw_value;
1785 channel_cfg[i].iter_count = 1;
1786 channel_cfg[i].iter_interval = 0;
1787 }
1788 }
1789
1790 static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids,
1791 struct cfg80211_ssid *ssids,
1792 int fragmented)
1793 {
1794 int flags = 0;
1795
1796 if (n_ssids == 0)
1797 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1798
1799 if (n_ssids == 1 && ssids[0].ssid_len != 0)
1800 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1801
1802 if (fragmented)
1803 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1804
1805 if (iwl_mvm_rrm_scan_needed(mvm))
1806 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1807
1808 return flags;
1809 }
1810
1811 int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1812 struct ieee80211_scan_request *req)
1813 {
1814 struct iwl_host_cmd hcmd = {
1815 .id = SCAN_REQ_UMAC,
1816 .len = { iwl_mvm_scan_size(mvm), },
1817 .data = { mvm->scan_cmd, },
1818 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1819 };
1820 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1821 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1822 sizeof(struct iwl_scan_channel_cfg_umac) *
1823 mvm->fw->ucode_capa.n_scan_channels;
1824 struct iwl_mvm_scan_params params = {};
1825 u32 uid, flags;
1826 u32 ssid_bitmap = 0;
1827 int ret, i, uid_idx;
1828
1829 lockdep_assert_held(&mvm->mutex);
1830
1831 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1832 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1833 return -EBUSY;
1834
1835 /* we should have failed registration if scan_cmd was NULL */
1836 if (WARN_ON(mvm->scan_cmd == NULL))
1837 return -ENOMEM;
1838
1839 if (WARN_ON(req->req.n_ssids > PROBE_OPTION_MAX ||
1840 req->ies.common_ie_len +
1841 req->ies.len[NL80211_BAND_2GHZ] +
1842 req->ies.len[NL80211_BAND_5GHZ] + 24 + 2 >
1843 SCAN_OFFLOAD_PROBE_REQ_SIZE || req->req.n_channels >
1844 mvm->fw->ucode_capa.n_scan_channels))
1845 return -ENOBUFS;
1846
1847 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1848 &params);
1849
1850 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1851
1852 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1853 mvm->scan_uid[uid_idx] = uid;
1854 cmd->uid = cpu_to_le32(uid);
1855
1856 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1857
1858 flags = iwl_mvm_scan_umac_common_flags(mvm, req->req.n_ssids,
1859 req->req.ssids,
1860 params.passive_fragmented);
1861
1862 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1863
1864 cmd->general_flags = cpu_to_le32(flags);
1865
1866 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
1867 mvm->last_ebs_successful)
1868 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1869 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1870 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1871
1872 cmd->n_channels = req->req.n_channels;
1873
1874 for (i = 0; i < req->req.n_ssids; i++)
1875 ssid_bitmap |= BIT(i);
1876
1877 iwl_mvm_umac_scan_cfg_channels(mvm, req->req.channels,
1878 req->req.n_channels, ssid_bitmap, cmd);
1879
1880 sec_part->schedule[0].iter_count = 1;
1881 sec_part->delay = 0;
1882
1883 iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, &sec_part->preq,
1884 req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1885 req->req.mac_addr : NULL,
1886 req->req.mac_addr_mask);
1887
1888 iwl_mvm_scan_fill_ssids(sec_part->direct_scan, req->req.ssids,
1889 req->req.n_ssids, 0);
1890
1891 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1892 if (!ret) {
1893 IWL_DEBUG_SCAN(mvm,
1894 "Scan request was sent successfully\n");
1895 } else {
1896 /*
1897 * If the scan failed, it usually means that the FW was unable
1898 * to allocate the time events. Warn on it, but maybe we
1899 * should try to send the command again with different params.
1900 */
1901 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1902 }
1903 return ret;
1904 }
1905
1906 int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1907 struct cfg80211_sched_scan_request *req,
1908 struct ieee80211_scan_ies *ies)
1909 {
1910
1911 struct iwl_host_cmd hcmd = {
1912 .id = SCAN_REQ_UMAC,
1913 .len = { iwl_mvm_scan_size(mvm), },
1914 .data = { mvm->scan_cmd, },
1915 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1916 };
1917 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1918 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1919 sizeof(struct iwl_scan_channel_cfg_umac) *
1920 mvm->fw->ucode_capa.n_scan_channels;
1921 struct iwl_mvm_scan_params params = {};
1922 u32 uid, flags;
1923 u32 ssid_bitmap = 0;
1924 int ret, uid_idx;
1925
1926 lockdep_assert_held(&mvm->mutex);
1927
1928 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1929 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1930 return -EBUSY;
1931
1932 /* we should have failed registration if scan_cmd was NULL */
1933 if (WARN_ON(mvm->scan_cmd == NULL))
1934 return -ENOMEM;
1935
1936 if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX ||
1937 ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1938 ies->len[NL80211_BAND_5GHZ] + 24 + 2 >
1939 SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels >
1940 mvm->fw->ucode_capa.n_scan_channels))
1941 return -ENOBUFS;
1942
1943 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags,
1944 &params);
1945
1946 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1947
1948 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1949
1950 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN);
1951 mvm->scan_uid[uid_idx] = uid;
1952 cmd->uid = cpu_to_le32(uid);
1953
1954 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1955
1956 flags = iwl_mvm_scan_umac_common_flags(mvm, req->n_ssids, req->ssids,
1957 params.passive_fragmented);
1958
1959 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1960
1961 if (iwl_mvm_scan_pass_all(mvm, req))
1962 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1963 else
1964 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1965
1966 cmd->general_flags = cpu_to_le32(flags);
1967
1968 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1969 mvm->last_ebs_successful)
1970 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1971 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1972 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1973
1974 cmd->n_channels = req->n_channels;
1975
1976 iwl_scan_offload_build_ssid(req, sec_part->direct_scan, &ssid_bitmap,
1977 false);
1978
1979 /* This API uses bits 0-19 instead of 1-20. */
1980 ssid_bitmap = ssid_bitmap >> 1;
1981
1982 iwl_mvm_umac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1983 ssid_bitmap, cmd);
1984
1985 sec_part->schedule[0].interval =
1986 cpu_to_le16(req->interval / MSEC_PER_SEC);
1987 sec_part->schedule[0].iter_count = 0xff;
1988
1989 sec_part->delay = 0;
1990
1991 iwl_mvm_build_unified_scan_probe(mvm, vif, ies, &sec_part->preq,
1992 req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1993 req->mac_addr : NULL,
1994 req->mac_addr_mask);
1995
1996 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1997 if (!ret) {
1998 IWL_DEBUG_SCAN(mvm,
1999 "Sched scan request was sent successfully\n");
2000 } else {
2001 /*
2002 * If the scan failed, it usually means that the FW was unable
2003 * to allocate the time events. Warn on it, but maybe we
2004 * should try to send the command again with different params.
2005 */
2006 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
2007 }
2008 return ret;
2009 }
2010
2011 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
2012 struct iwl_rx_cmd_buffer *rxb,
2013 struct iwl_device_cmd *cmd)
2014 {
2015 struct iwl_rx_packet *pkt = rxb_addr(rxb);
2016 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
2017 u32 uid = __le32_to_cpu(notif->uid);
2018 bool sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN);
2019 int uid_idx = iwl_mvm_find_scan_uid(mvm, uid);
2020
2021 /*
2022 * Scan uid may be set to zero in case of scan abort request from above.
2023 */
2024 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
2025 return 0;
2026
2027 IWL_DEBUG_SCAN(mvm,
2028 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
2029 uid, sched ? "sched" : "regular",
2030 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
2031 "completed" : "aborted",
2032 notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
2033 "success" : "failed");
2034
2035 if (notif->ebs_status)
2036 mvm->last_ebs_successful = false;
2037
2038 mvm->scan_uid[uid_idx] = 0;
2039
2040 if (!sched) {
2041 ieee80211_scan_completed(mvm->hw,
2042 notif->status ==
2043 IWL_SCAN_OFFLOAD_ABORTED);
2044 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2045 } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) {
2046 ieee80211_sched_scan_stopped(mvm->hw);
2047 } else {
2048 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
2049 }
2050
2051 return 0;
2052 }
2053
2054 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
2055 struct iwl_rx_packet *pkt, void *data)
2056 {
2057 struct iwl_umac_scan_done *scan_done = data;
2058 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
2059 u32 uid = __le32_to_cpu(notif->uid);
2060 int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid);
2061
2062 if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
2063 return false;
2064
2065 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
2066 return false;
2067
2068 /*
2069 * Clear scan uid of scans that was aborted from above and completed
2070 * in FW so the RX handler does nothing. Set last_ebs_successful here if
2071 * needed.
2072 */
2073 scan_done->mvm->scan_uid[uid_idx] = 0;
2074
2075 if (notif->ebs_status)
2076 scan_done->mvm->last_ebs_successful = false;
2077
2078 return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
2079 }
2080
2081 static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
2082 {
2083 struct iwl_umac_scan_abort cmd = {
2084 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
2085 sizeof(struct iwl_mvm_umac_cmd_hdr)),
2086 .uid = cpu_to_le32(uid),
2087 };
2088
2089 lockdep_assert_held(&mvm->mutex);
2090
2091 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
2092
2093 return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
2094 }
2095
2096 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
2097 enum iwl_umac_scan_uid_type type, bool notify)
2098 {
2099 struct iwl_notification_wait wait_scan_done;
2100 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, };
2101 struct iwl_umac_scan_done scan_done = {
2102 .mvm = mvm,
2103 .type = type,
2104 };
2105 int i, ret = -EIO;
2106
2107 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
2108 scan_done_notif,
2109 ARRAY_SIZE(scan_done_notif),
2110 iwl_scan_umac_done_check, &scan_done);
2111
2112 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
2113
2114 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) {
2115 if (mvm->scan_uid[i] & type) {
2116 int err;
2117
2118 if (iwl_mvm_is_radio_killed(mvm) &&
2119 (type & IWL_UMAC_SCAN_UID_REG_SCAN)) {
2120 ieee80211_scan_completed(mvm->hw, true);
2121 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2122 break;
2123 }
2124
2125 err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
2126 if (!err)
2127 ret = 0;
2128 }
2129 }
2130
2131 if (ret) {
2132 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
2133 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
2134 return ret;
2135 }
2136
2137 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
2138 if (ret)
2139 return ret;
2140
2141 if (notify) {
2142 if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN)
2143 ieee80211_sched_scan_stopped(mvm->hw);
2144 if (type & IWL_UMAC_SCAN_UID_REG_SCAN) {
2145 ieee80211_scan_completed(mvm->hw, true);
2146 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2147 }
2148 }
2149
2150 return ret;
2151 }
2152
2153 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
2154 {
2155 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2156 return sizeof(struct iwl_scan_req_umac) +
2157 sizeof(struct iwl_scan_channel_cfg_umac) *
2158 mvm->fw->ucode_capa.n_scan_channels +
2159 sizeof(struct iwl_scan_req_umac_tail);
2160
2161 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2162 return sizeof(struct iwl_scan_req_unified_lmac) +
2163 sizeof(struct iwl_scan_channel_cfg_lmac) *
2164 mvm->fw->ucode_capa.n_scan_channels +
2165 sizeof(struct iwl_scan_probe_req);
2166
2167 return sizeof(struct iwl_scan_cmd) +
2168 mvm->fw->ucode_capa.max_probe_length +
2169 mvm->fw->ucode_capa.n_scan_channels *
2170 sizeof(struct iwl_scan_channel);
2171 }
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