iwlwifi: mvm: wait for stop sched-scan completion
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
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3 * This file is provided under a dual BSD/GPLv2 license. When using or
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8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
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62 *****************************************************************************/
63
64 #include <linux/etherdevice.h>
65 #include <net/mac80211.h>
66
67 #include "mvm.h"
68 #include "iwl-eeprom-parse.h"
69 #include "fw-api-scan.h"
70
71 #define IWL_PLCP_QUIET_THRESH 1
72 #define IWL_ACTIVE_QUIET_TIME 10
73 #define LONG_OUT_TIME_PERIOD 600
74 #define SHORT_OUT_TIME_PERIOD 200
75 #define SUSPEND_TIME_PERIOD 100
76
77 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
78 {
79 u16 rx_chain;
80 u8 rx_ant;
81
82 if (mvm->scan_rx_ant != ANT_NONE)
83 rx_ant = mvm->scan_rx_ant;
84 else
85 rx_ant = mvm->fw->valid_rx_ant;
86 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
87 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
88 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
89 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
90 return cpu_to_le16(rx_chain);
91 }
92
93 static inline __le32 iwl_mvm_scan_max_out_time(struct ieee80211_vif *vif,
94 u32 flags, bool is_assoc)
95 {
96 if (!is_assoc)
97 return 0;
98 if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
99 return cpu_to_le32(ieee80211_tu_to_usec(SHORT_OUT_TIME_PERIOD));
100 return cpu_to_le32(ieee80211_tu_to_usec(LONG_OUT_TIME_PERIOD));
101 }
102
103 static inline __le32 iwl_mvm_scan_suspend_time(struct ieee80211_vif *vif,
104 bool is_assoc)
105 {
106 if (!is_assoc)
107 return 0;
108 return cpu_to_le32(ieee80211_tu_to_usec(SUSPEND_TIME_PERIOD));
109 }
110
111 static inline __le32
112 iwl_mvm_scan_rxon_flags(struct cfg80211_scan_request *req)
113 {
114 if (req->channels[0]->band == IEEE80211_BAND_2GHZ)
115 return cpu_to_le32(PHY_BAND_24);
116 else
117 return cpu_to_le32(PHY_BAND_5);
118 }
119
120 static inline __le32
121 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
122 bool no_cck)
123 {
124 u32 tx_ant;
125
126 mvm->scan_last_antenna_idx =
127 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
128 mvm->scan_last_antenna_idx);
129 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
130
131 if (band == IEEE80211_BAND_2GHZ && !no_cck)
132 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
133 tx_ant);
134 else
135 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
136 }
137
138 /*
139 * We insert the SSIDs in an inverted order, because the FW will
140 * invert it back. The most prioritized SSID, which is first in the
141 * request list, is not copied here, but inserted directly to the probe
142 * request.
143 */
144 static void iwl_mvm_scan_fill_ssids(struct iwl_scan_cmd *cmd,
145 struct cfg80211_scan_request *req,
146 int first)
147 {
148 int fw_idx, req_idx;
149
150 for (req_idx = req->n_ssids - 1, fw_idx = 0; req_idx >= first;
151 req_idx--, fw_idx++) {
152 cmd->direct_scan[fw_idx].id = WLAN_EID_SSID;
153 cmd->direct_scan[fw_idx].len = req->ssids[req_idx].ssid_len;
154 memcpy(cmd->direct_scan[fw_idx].ssid,
155 req->ssids[req_idx].ssid,
156 req->ssids[req_idx].ssid_len);
157 }
158 }
159
160 /*
161 * If req->n_ssids > 0, it means we should do an active scan.
162 * In case of active scan w/o directed scan, we receive a zero-length SSID
163 * just to notify that this scan is active and not passive.
164 * In order to notify the FW of the number of SSIDs we wish to scan (including
165 * the zero-length one), we need to set the corresponding bits in chan->type,
166 * one for each SSID, and set the active bit (first). If the first SSID is
167 * already included in the probe template, so we need to set only
168 * req->n_ssids - 1 bits in addition to the first bit.
169 */
170 static u16 iwl_mvm_get_active_dwell(enum ieee80211_band band, int n_ssids)
171 {
172 if (band == IEEE80211_BAND_2GHZ)
173 return 30 + 3 * (n_ssids + 1);
174 return 20 + 2 * (n_ssids + 1);
175 }
176
177 static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band)
178 {
179 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
180 }
181
182 static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd,
183 struct cfg80211_scan_request *req,
184 bool basic_ssid)
185 {
186 u16 passive_dwell = iwl_mvm_get_passive_dwell(req->channels[0]->band);
187 u16 active_dwell = iwl_mvm_get_active_dwell(req->channels[0]->band,
188 req->n_ssids);
189 struct iwl_scan_channel *chan = (struct iwl_scan_channel *)
190 (cmd->data + le16_to_cpu(cmd->tx_cmd.len));
191 int i;
192 int type = BIT(req->n_ssids) - 1;
193
194 if (!basic_ssid)
195 type |= BIT(req->n_ssids);
196
197 for (i = 0; i < cmd->channel_count; i++) {
198 chan->channel = cpu_to_le16(req->channels[i]->hw_value);
199 chan->type = cpu_to_le32(type);
200 if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR)
201 chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE);
202 chan->active_dwell = cpu_to_le16(active_dwell);
203 chan->passive_dwell = cpu_to_le16(passive_dwell);
204 chan->iteration_count = cpu_to_le16(1);
205 chan++;
206 }
207 }
208
209 /*
210 * Fill in probe request with the following parameters:
211 * TA is our vif HW address, which mac80211 ensures we have.
212 * Packet is broadcasted, so this is both SA and DA.
213 * The probe request IE is made out of two: first comes the most prioritized
214 * SSID if a directed scan is requested. Second comes whatever extra
215 * information was given to us as the scan request IE.
216 */
217 static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
218 int n_ssids, const u8 *ssid, int ssid_len,
219 const u8 *ie, int ie_len,
220 int left)
221 {
222 int len = 0;
223 u8 *pos = NULL;
224
225 /* Make sure there is enough space for the probe request,
226 * two mandatory IEs and the data */
227 left -= 24;
228 if (left < 0)
229 return 0;
230
231 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
232 eth_broadcast_addr(frame->da);
233 memcpy(frame->sa, ta, ETH_ALEN);
234 eth_broadcast_addr(frame->bssid);
235 frame->seq_ctrl = 0;
236
237 len += 24;
238
239 /* for passive scans, no need to fill anything */
240 if (n_ssids == 0)
241 return (u16)len;
242
243 /* points to the payload of the request */
244 pos = &frame->u.probe_req.variable[0];
245
246 /* fill in our SSID IE */
247 left -= ssid_len + 2;
248 if (left < 0)
249 return 0;
250 *pos++ = WLAN_EID_SSID;
251 *pos++ = ssid_len;
252 if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */
253 memcpy(pos, ssid, ssid_len);
254 pos += ssid_len;
255 }
256
257 len += ssid_len + 2;
258
259 if (WARN_ON(left < ie_len))
260 return len;
261
262 if (ie && ie_len) {
263 memcpy(pos, ie, ie_len);
264 len += ie_len;
265 }
266
267 return (u16)len;
268 }
269
270 static void iwl_mvm_vif_assoc_iterator(void *data, u8 *mac,
271 struct ieee80211_vif *vif)
272 {
273 bool *is_assoc = data;
274
275 if (vif->bss_conf.assoc)
276 *is_assoc = true;
277 }
278
279 int iwl_mvm_scan_request(struct iwl_mvm *mvm,
280 struct ieee80211_vif *vif,
281 struct cfg80211_scan_request *req)
282 {
283 struct iwl_host_cmd hcmd = {
284 .id = SCAN_REQUEST_CMD,
285 .len = { 0, },
286 .data = { mvm->scan_cmd, },
287 .flags = CMD_SYNC,
288 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
289 };
290 struct iwl_scan_cmd *cmd = mvm->scan_cmd;
291 bool is_assoc = false;
292 int ret;
293 u32 status;
294 int ssid_len = 0;
295 u8 *ssid = NULL;
296 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
297 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
298
299 lockdep_assert_held(&mvm->mutex);
300 BUG_ON(mvm->scan_cmd == NULL);
301
302 IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
303 mvm->scan_status = IWL_MVM_SCAN_OS;
304 memset(cmd, 0, sizeof(struct iwl_scan_cmd) +
305 mvm->fw->ucode_capa.max_probe_length +
306 (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel)));
307 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
308 IEEE80211_IFACE_ITER_NORMAL,
309 iwl_mvm_vif_assoc_iterator,
310 &is_assoc);
311 cmd->channel_count = (u8)req->n_channels;
312 cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
313 cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
314 cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
315 cmd->max_out_time = iwl_mvm_scan_max_out_time(vif, req->flags,
316 is_assoc);
317 cmd->suspend_time = iwl_mvm_scan_suspend_time(vif, is_assoc);
318 cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req);
319 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
320 MAC_FILTER_IN_BEACON);
321
322 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
323 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
324 else
325 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
326
327 cmd->repeats = cpu_to_le32(1);
328
329 /*
330 * If the user asked for passive scan, don't change to active scan if
331 * you see any activity on the channel - remain passive.
332 */
333 if (req->n_ssids > 0) {
334 cmd->passive2active = cpu_to_le16(1);
335 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
336 if (basic_ssid) {
337 ssid = req->ssids[0].ssid;
338 ssid_len = req->ssids[0].ssid_len;
339 }
340 } else {
341 cmd->passive2active = 0;
342 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
343 }
344
345 iwl_mvm_scan_fill_ssids(cmd, req, basic_ssid ? 1 : 0);
346
347 cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
348 TX_CMD_FLG_BT_DIS);
349 cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
350 cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
351 cmd->tx_cmd.rate_n_flags =
352 iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
353 req->no_cck);
354
355 cmd->tx_cmd.len =
356 cpu_to_le16(iwl_mvm_fill_probe_req(
357 (struct ieee80211_mgmt *)cmd->data,
358 vif->addr,
359 req->n_ssids, ssid, ssid_len,
360 req->ie, req->ie_len,
361 mvm->fw->ucode_capa.max_probe_length));
362
363 iwl_mvm_scan_fill_channels(cmd, req, basic_ssid);
364
365 cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
366 le16_to_cpu(cmd->tx_cmd.len) +
367 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
368 hcmd.len[0] = le16_to_cpu(cmd->len);
369
370 status = SCAN_RESPONSE_OK;
371 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
372 if (!ret && status == SCAN_RESPONSE_OK) {
373 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
374 } else {
375 /*
376 * If the scan failed, it usually means that the FW was unable
377 * to allocate the time events. Warn on it, but maybe we
378 * should try to send the command again with different params.
379 */
380 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
381 status, ret);
382 mvm->scan_status = IWL_MVM_SCAN_NONE;
383 ret = -EIO;
384 }
385 return ret;
386 }
387
388 int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
389 struct iwl_device_cmd *cmd)
390 {
391 struct iwl_rx_packet *pkt = rxb_addr(rxb);
392 struct iwl_cmd_response *resp = (void *)pkt->data;
393
394 IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
395 le32_to_cpu(resp->status));
396 return 0;
397 }
398
399 int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
400 struct iwl_device_cmd *cmd)
401 {
402 struct iwl_rx_packet *pkt = rxb_addr(rxb);
403 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
404
405 IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
406 notif->status, notif->scanned_channels);
407
408 mvm->scan_status = IWL_MVM_SCAN_NONE;
409 ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
410
411 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
412
413 return 0;
414 }
415
416 int iwl_mvm_rx_sched_scan_results(struct iwl_mvm *mvm,
417 struct iwl_rx_cmd_buffer *rxb,
418 struct iwl_device_cmd *cmd)
419 {
420 struct iwl_rx_packet *pkt = rxb_addr(rxb);
421 struct iwl_sched_scan_results *notif = (void *)pkt->data;
422
423 if (notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN) {
424 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
425 ieee80211_sched_scan_results(mvm->hw);
426 }
427
428 return 0;
429 }
430
431 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
432 struct iwl_rx_packet *pkt, void *data)
433 {
434 struct iwl_mvm *mvm =
435 container_of(notif_wait, struct iwl_mvm, notif_wait);
436 struct iwl_scan_complete_notif *notif;
437 u32 *resp;
438
439 switch (pkt->hdr.cmd) {
440 case SCAN_ABORT_CMD:
441 resp = (void *)pkt->data;
442 if (*resp == CAN_ABORT_STATUS) {
443 IWL_DEBUG_SCAN(mvm,
444 "Scan can be aborted, wait until completion\n");
445 return false;
446 }
447
448 /*
449 * If scan cannot be aborted, it means that we had a
450 * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
451 * ieee80211_scan_completed already.
452 */
453 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
454 *resp);
455 return true;
456
457 case SCAN_COMPLETE_NOTIFICATION:
458 notif = (void *)pkt->data;
459 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
460 notif->status);
461 return true;
462
463 default:
464 WARN_ON(1);
465 return false;
466 };
467 }
468
469 void iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
470 {
471 struct iwl_notification_wait wait_scan_abort;
472 static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
473 SCAN_COMPLETE_NOTIFICATION };
474 int ret;
475
476 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
477 return;
478
479 if (iwl_mvm_is_radio_killed(mvm)) {
480 ieee80211_scan_completed(mvm->hw, true);
481 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
482 mvm->scan_status = IWL_MVM_SCAN_NONE;
483 return;
484 }
485
486 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
487 scan_abort_notif,
488 ARRAY_SIZE(scan_abort_notif),
489 iwl_mvm_scan_abort_notif, NULL);
490
491 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, CMD_SYNC, 0, NULL);
492 if (ret) {
493 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
494 /* mac80211's state will be cleaned in the nic_restart flow */
495 goto out_remove_notif;
496 }
497
498 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, 1 * HZ);
499 if (ret)
500 IWL_ERR(mvm, "%s - failed on timeout\n", __func__);
501
502 return;
503
504 out_remove_notif:
505 iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
506 }
507
508 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
509 struct iwl_rx_cmd_buffer *rxb,
510 struct iwl_device_cmd *cmd)
511 {
512 struct iwl_rx_packet *pkt = rxb_addr(rxb);
513 struct iwl_scan_offload_complete *scan_notif = (void *)pkt->data;
514
515 /* scan status must be locked for proper checking */
516 lockdep_assert_held(&mvm->mutex);
517
518 IWL_DEBUG_SCAN(mvm, "Scheduled scan completed, status %s\n",
519 scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
520 "completed" : "aborted");
521
522 /* only call mac80211 completion if the stop was initiated by FW */
523 if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
524 mvm->scan_status = IWL_MVM_SCAN_NONE;
525 ieee80211_sched_scan_stopped(mvm->hw);
526 }
527
528 return 0;
529 }
530
531 static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
532 struct ieee80211_vif *vif,
533 struct ieee80211_sched_scan_ies *ies,
534 enum ieee80211_band band,
535 struct iwl_tx_cmd *cmd,
536 u8 *data)
537 {
538 u16 cmd_len;
539
540 cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
541 cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
542 cmd->sta_id = mvm->aux_sta.sta_id;
543
544 cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
545
546 cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
547 vif->addr,
548 1, NULL, 0,
549 ies->ie[band], ies->len[band],
550 SCAN_OFFLOAD_PROBE_REQ_SIZE);
551 cmd->len = cpu_to_le16(cmd_len);
552 }
553
554 static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
555 struct ieee80211_vif *vif,
556 struct cfg80211_sched_scan_request *req,
557 struct iwl_scan_offload_cmd *scan)
558 {
559 bool is_assoc = false;
560
561 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
562 IEEE80211_IFACE_ITER_NORMAL,
563 iwl_mvm_vif_assoc_iterator,
564 &is_assoc);
565 scan->channel_count =
566 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
567 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
568 scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
569 scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
570 scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
571 scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
572 scan->max_out_time = iwl_mvm_scan_max_out_time(vif, req->flags,
573 is_assoc);
574 scan->suspend_time = iwl_mvm_scan_suspend_time(vif, is_assoc);
575 scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
576 MAC_FILTER_IN_BEACON);
577 scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
578 scan->rep_count = cpu_to_le32(1);
579 }
580
581 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
582 {
583 int i;
584
585 for (i = 0; i < PROBE_OPTION_MAX; i++) {
586 if (!ssid_list[i].len)
587 break;
588 if (ssid_list[i].len == ssid_len &&
589 !memcmp(ssid_list->ssid, ssid, ssid_len))
590 return i;
591 }
592 return -1;
593 }
594
595 static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
596 struct iwl_scan_offload_cmd *scan,
597 u32 *ssid_bitmap)
598 {
599 int i, j;
600 int index;
601
602 /*
603 * copy SSIDs from match list.
604 * iwl_config_sched_scan_profiles() uses the order of these ssids to
605 * config match list.
606 */
607 for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
608 /* skip empty SSID matchsets */
609 if (!req->match_sets[i].ssid.ssid_len)
610 continue;
611 scan->direct_scan[i].id = WLAN_EID_SSID;
612 scan->direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
613 memcpy(scan->direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
614 scan->direct_scan[i].len);
615 }
616
617 /* add SSIDs from scan SSID list */
618 *ssid_bitmap = 0;
619 for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
620 index = iwl_ssid_exist(req->ssids[j].ssid,
621 req->ssids[j].ssid_len,
622 scan->direct_scan);
623 if (index < 0) {
624 if (!req->ssids[j].ssid_len)
625 continue;
626 scan->direct_scan[i].id = WLAN_EID_SSID;
627 scan->direct_scan[i].len = req->ssids[j].ssid_len;
628 memcpy(scan->direct_scan[i].ssid, req->ssids[j].ssid,
629 scan->direct_scan[i].len);
630 *ssid_bitmap |= BIT(i + 1);
631 i++;
632 } else {
633 *ssid_bitmap |= BIT(index + 1);
634 }
635 }
636 }
637
638 static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
639 struct cfg80211_sched_scan_request *req,
640 struct iwl_scan_channel_cfg *channels,
641 enum ieee80211_band band,
642 int *head, int *tail,
643 u32 ssid_bitmap)
644 {
645 struct ieee80211_supported_band *s_band;
646 int n_probes = req->n_ssids;
647 int n_channels = req->n_channels;
648 u8 active_dwell, passive_dwell;
649 int i, j, index = 0;
650 bool partial;
651
652 /*
653 * We have to configure all supported channels, even if we don't want to
654 * scan on them, but we have to send channels in the order that we want
655 * to scan. So add requested channels to head of the list and others to
656 * the end.
657 */
658 active_dwell = iwl_mvm_get_active_dwell(band, n_probes);
659 passive_dwell = iwl_mvm_get_passive_dwell(band);
660 s_band = &mvm->nvm_data->bands[band];
661
662 for (i = 0; i < s_band->n_channels && *head <= *tail; i++) {
663 partial = false;
664 for (j = 0; j < n_channels; j++)
665 if (s_band->channels[i].center_freq ==
666 req->channels[j]->center_freq) {
667 index = *head;
668 (*head)++;
669 /*
670 * Channels that came with the request will be
671 * in partial scan .
672 */
673 partial = true;
674 break;
675 }
676 if (!partial) {
677 index = *tail;
678 (*tail)--;
679 }
680 channels->channel_number[index] =
681 cpu_to_le16(ieee80211_frequency_to_channel(
682 s_band->channels[i].center_freq));
683 channels->dwell_time[index][0] = active_dwell;
684 channels->dwell_time[index][1] = passive_dwell;
685
686 channels->iter_count[index] = cpu_to_le16(1);
687 channels->iter_interval[index] = 0;
688
689 if (!(s_band->channels[i].flags & IEEE80211_CHAN_NO_IR))
690 channels->type[index] |=
691 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
692
693 channels->type[index] |=
694 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL);
695 if (partial)
696 channels->type[index] |=
697 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
698
699 if (s_band->channels[i].flags & IEEE80211_CHAN_NO_HT40)
700 channels->type[index] |=
701 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
702
703 /* scan for all SSIDs from req->ssids */
704 channels->type[index] |= cpu_to_le32(ssid_bitmap);
705 }
706 }
707
708 int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
709 struct ieee80211_vif *vif,
710 struct cfg80211_sched_scan_request *req,
711 struct ieee80211_sched_scan_ies *ies)
712 {
713 int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
714 int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
715 int head = 0;
716 int tail = band_2ghz + band_5ghz;
717 u32 ssid_bitmap;
718 int cmd_len;
719 int ret;
720
721 struct iwl_scan_offload_cfg *scan_cfg;
722 struct iwl_host_cmd cmd = {
723 .id = SCAN_OFFLOAD_CONFIG_CMD,
724 .flags = CMD_SYNC,
725 };
726
727 lockdep_assert_held(&mvm->mutex);
728
729 cmd_len = sizeof(struct iwl_scan_offload_cfg) +
730 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
731
732 scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
733 if (!scan_cfg)
734 return -ENOMEM;
735
736 iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd);
737 scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
738
739 iwl_scan_offload_build_ssid(req, &scan_cfg->scan_cmd, &ssid_bitmap);
740 /* build tx frames for supported bands */
741 if (band_2ghz) {
742 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
743 IEEE80211_BAND_2GHZ,
744 &scan_cfg->scan_cmd.tx_cmd[0],
745 scan_cfg->data);
746 iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg,
747 IEEE80211_BAND_2GHZ, &head, &tail,
748 ssid_bitmap);
749 }
750 if (band_5ghz) {
751 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
752 IEEE80211_BAND_5GHZ,
753 &scan_cfg->scan_cmd.tx_cmd[1],
754 scan_cfg->data +
755 SCAN_OFFLOAD_PROBE_REQ_SIZE);
756 iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg,
757 IEEE80211_BAND_5GHZ, &head, &tail,
758 ssid_bitmap);
759 }
760
761 cmd.data[0] = scan_cfg;
762 cmd.len[0] = cmd_len;
763 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
764
765 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
766
767 ret = iwl_mvm_send_cmd(mvm, &cmd);
768 kfree(scan_cfg);
769 return ret;
770 }
771
772 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
773 struct cfg80211_sched_scan_request *req)
774 {
775 struct iwl_scan_offload_profile *profile;
776 struct iwl_scan_offload_profile_cfg *profile_cfg;
777 struct iwl_scan_offload_blacklist *blacklist;
778 struct iwl_host_cmd cmd = {
779 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
780 .flags = CMD_SYNC,
781 .len[1] = sizeof(*profile_cfg),
782 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
783 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
784 };
785 int blacklist_len;
786 int i;
787 int ret;
788
789 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
790 return -EIO;
791
792 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
793 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
794 else
795 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
796
797 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
798 if (!blacklist)
799 return -ENOMEM;
800
801 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
802 if (!profile_cfg) {
803 ret = -ENOMEM;
804 goto free_blacklist;
805 }
806
807 cmd.data[0] = blacklist;
808 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
809 cmd.data[1] = profile_cfg;
810
811 /* No blacklist configuration */
812
813 profile_cfg->num_profiles = req->n_match_sets;
814 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
815 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
816 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
817 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
818 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
819
820 for (i = 0; i < req->n_match_sets; i++) {
821 profile = &profile_cfg->profiles[i];
822 profile->ssid_index = i;
823 /* Support any cipher and auth algorithm */
824 profile->unicast_cipher = 0xff;
825 profile->auth_alg = 0xff;
826 profile->network_type = IWL_NETWORK_TYPE_ANY;
827 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
828 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
829 }
830
831 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
832
833 ret = iwl_mvm_send_cmd(mvm, &cmd);
834 kfree(profile_cfg);
835 free_blacklist:
836 kfree(blacklist);
837
838 return ret;
839 }
840
841 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
842 struct cfg80211_sched_scan_request *req)
843 {
844 struct iwl_scan_offload_req scan_req = {
845 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
846
847 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
848 .schedule_line[0].delay = req->interval / 1000,
849 .schedule_line[0].full_scan_mul = 1,
850
851 .schedule_line[1].iterations = 0xff,
852 .schedule_line[1].delay = req->interval / 1000,
853 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
854 };
855
856 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
857 IWL_DEBUG_SCAN(mvm,
858 "Sending scheduled scan with filtering, filter len %d\n",
859 req->n_match_sets);
860 } else {
861 IWL_DEBUG_SCAN(mvm,
862 "Sending Scheduled scan without filtering\n");
863 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
864 }
865
866 return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, CMD_SYNC,
867 sizeof(scan_req), &scan_req);
868 }
869
870 static int iwl_mvm_send_sched_scan_abort(struct iwl_mvm *mvm)
871 {
872 int ret;
873 struct iwl_host_cmd cmd = {
874 .id = SCAN_OFFLOAD_ABORT_CMD,
875 .flags = CMD_SYNC,
876 };
877 u32 status;
878
879 /* Exit instantly with error when device is not ready
880 * to receive scan abort command or it does not perform
881 * scheduled scan currently */
882 if (mvm->scan_status != IWL_MVM_SCAN_SCHED)
883 return -EIO;
884
885 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
886 if (ret)
887 return ret;
888
889 if (status != CAN_ABORT_STATUS) {
890 /*
891 * The scan abort will return 1 for success or
892 * 2 for "failure". A failure condition can be
893 * due to simply not being in an active scan which
894 * can occur if we send the scan abort before the
895 * microcode has notified us that a scan is completed.
896 */
897 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
898 ret = -ENOENT;
899 }
900
901 return ret;
902 }
903
904 int iwl_mvm_sched_scan_stop(struct iwl_mvm *mvm)
905 {
906 int ret;
907 struct iwl_notification_wait wait_scan_done;
908 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
909
910 lockdep_assert_held(&mvm->mutex);
911
912 if (mvm->scan_status != IWL_MVM_SCAN_SCHED) {
913 IWL_DEBUG_SCAN(mvm, "No offloaded scan to stop\n");
914 return 0;
915 }
916
917 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
918 scan_done_notif,
919 ARRAY_SIZE(scan_done_notif),
920 NULL, NULL);
921
922 ret = iwl_mvm_send_sched_scan_abort(mvm);
923 if (ret) {
924 IWL_DEBUG_SCAN(mvm, "Send stop offload scan failed %d\n", ret);
925 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
926 return ret;
927 }
928
929 IWL_DEBUG_SCAN(mvm, "Successfully sent stop offload scan\n");
930
931 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
932 if (ret)
933 return ret;
934
935 /*
936 * Clear the scan status so the next scan requests will succeed. This
937 * also ensures the Rx handler doesn't do anything, as the scan was
938 * stopped from above.
939 */
940 mvm->scan_status = IWL_MVM_SCAN_NONE;
941
942 return 0;
943 }
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