1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
36 * All rights reserved.
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39 * modification, are permitted provided that the following conditions
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50 * from this software without specific prior written permission.
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62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
66 #include <linux/etherdevice.h>
67 #include <net/mac80211.h>
70 #include "fw-api-scan.h"
72 #define IWL_DENSE_EBS_SCAN_RATIO 5
73 #define IWL_SPARSE_EBS_SCAN_RATIO 1
75 struct iwl_mvm_scan_params {
78 bool passive_fragmented;
82 struct cfg80211_ssid *ssids;
83 struct ieee80211_channel **channels;
84 u16 interval; /* interval between scans (in secs) */
91 struct iwl_scan_probe_req preq;
92 struct cfg80211_match_set *match_sets;
97 } dwell[IEEE80211_NUM_BANDS];
100 u8 full_scan_mul; /* not used for UMAC */
104 enum iwl_umac_scan_uid_type {
105 IWL_UMAC_SCAN_UID_REG_SCAN = BIT(0),
106 IWL_UMAC_SCAN_UID_SCHED_SCAN = BIT(1),
109 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
110 enum iwl_umac_scan_uid_type type, bool notify);
112 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
114 if (mvm->scan_rx_ant != ANT_NONE)
115 return mvm->scan_rx_ant;
116 return iwl_mvm_get_valid_rx_ant(mvm);
119 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
124 rx_ant = iwl_mvm_scan_rx_ant(mvm);
125 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
126 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
127 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
128 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
129 return cpu_to_le16(rx_chain);
132 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
134 if (band == IEEE80211_BAND_2GHZ)
135 return cpu_to_le32(PHY_BAND_24);
137 return cpu_to_le32(PHY_BAND_5);
141 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
146 mvm->scan_last_antenna_idx =
147 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
148 mvm->scan_last_antenna_idx);
149 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
151 if (band == IEEE80211_BAND_2GHZ && !no_cck)
152 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
155 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
159 * If req->n_ssids > 0, it means we should do an active scan.
160 * In case of active scan w/o directed scan, we receive a zero-length SSID
161 * just to notify that this scan is active and not passive.
162 * In order to notify the FW of the number of SSIDs we wish to scan (including
163 * the zero-length one), we need to set the corresponding bits in chan->type,
164 * one for each SSID, and set the active bit (first). If the first SSID is
165 * already included in the probe template, so we need to set only
166 * req->n_ssids - 1 bits in addition to the first bit.
168 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
169 enum ieee80211_band band, int n_ssids)
171 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
173 if (band == IEEE80211_BAND_2GHZ)
174 return 20 + 3 * (n_ssids + 1);
175 return 10 + 2 * (n_ssids + 1);
178 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
179 enum ieee80211_band band)
181 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
183 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
186 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
187 struct ieee80211_vif *vif)
189 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
190 int *global_cnt = data;
192 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
193 mvmvif->phy_ctxt->id < MAX_PHYS)
197 static void iwl_mvm_scan_calc_dwell(struct iwl_mvm *mvm,
198 struct ieee80211_vif *vif,
199 struct iwl_mvm_scan_params *params)
202 enum ieee80211_band band;
203 u8 frag_passive_dwell = 0;
205 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
206 IEEE80211_IFACE_ITER_NORMAL,
207 iwl_mvm_scan_condition_iterator,
212 params->suspend_time = 30;
213 params->max_out_time = 120;
215 if (iwl_mvm_low_latency(mvm)) {
216 if (mvm->fw->ucode_capa.api[0] &
217 IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
218 params->suspend_time = 105;
220 * If there is more than one active interface make
221 * passive scan more fragmented.
223 frag_passive_dwell = 40;
224 params->max_out_time = frag_passive_dwell;
226 params->suspend_time = 120;
227 params->max_out_time = 120;
231 if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
232 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
234 * P2P device scan should not be fragmented to avoid negative
235 * impact on P2P device discovery. Configure max_out_time to be
236 * equal to dwell time on passive channel. Take a longest
237 * possible value, one that corresponds to 2GHz band
239 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
241 iwl_mvm_get_passive_dwell(mvm,
242 IEEE80211_BAND_2GHZ);
243 params->max_out_time = passive_dwell;
245 params->passive_fragmented = true;
249 if ((params->flags & NL80211_SCAN_FLAG_LOW_PRIORITY) &&
250 (params->max_out_time > 200))
251 params->max_out_time = 200;
255 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
256 if (params->passive_fragmented)
257 params->dwell[band].fragmented = frag_passive_dwell;
259 params->dwell[band].passive = iwl_mvm_get_passive_dwell(mvm,
261 params->dwell[band].active =
262 iwl_mvm_get_active_dwell(mvm, band, params->n_ssids);
266 "scan parameters: max_out_time %d, suspend_time %d, passive_fragmented %d\n",
267 params->max_out_time, params->suspend_time,
268 params->passive_fragmented);
270 "dwell[IEEE80211_BAND_2GHZ]: passive %d, active %d, fragmented %d\n",
271 params->dwell[IEEE80211_BAND_2GHZ].passive,
272 params->dwell[IEEE80211_BAND_2GHZ].active,
273 params->dwell[IEEE80211_BAND_2GHZ].fragmented);
275 "dwell[IEEE80211_BAND_5GHZ]: passive %d, active %d, fragmented %d\n",
276 params->dwell[IEEE80211_BAND_5GHZ].passive,
277 params->dwell[IEEE80211_BAND_5GHZ].active,
278 params->dwell[IEEE80211_BAND_5GHZ].fragmented);
281 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
283 /* require rrm scan whenever the fw supports it */
284 return mvm->fw->ucode_capa.capa[0] &
285 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
288 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
292 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
294 /* we create the 802.11 header and SSID element */
295 max_probe_len -= 24 + 2;
297 /* DS parameter set element is added on 2.4GHZ band if required */
298 if (iwl_mvm_rrm_scan_needed(mvm))
301 return max_probe_len;
304 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
306 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
308 /* TODO: [BUG] This function should return the maximum allowed size of
309 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
310 * in the same command. So the correct implementation of this function
311 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
312 * command has only 512 bytes and it would leave us with about 240
313 * bytes for scan IEs, which is clearly not enough. So meanwhile
314 * we will report an incorrect value. This may result in a failure to
315 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
316 * functions with -ENOBUFS, if a large enough probe will be provided.
321 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm,
322 struct iwl_rx_cmd_buffer *rxb,
323 struct iwl_device_cmd *cmd)
325 struct iwl_rx_packet *pkt = rxb_addr(rxb);
326 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
329 "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
330 notif->status, notif->scanned_channels);
334 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
335 struct iwl_rx_cmd_buffer *rxb,
336 struct iwl_device_cmd *cmd)
338 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
339 ieee80211_sched_scan_results(mvm->hw);
344 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
345 struct iwl_rx_cmd_buffer *rxb,
346 struct iwl_device_cmd *cmd)
348 struct iwl_rx_packet *pkt = rxb_addr(rxb);
349 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
350 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
351 bool ebs_successful = (scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS);
353 /* scan status must be locked for proper checking */
354 lockdep_assert_held(&mvm->mutex);
356 /* We first check if we were stopping a scan, in which case we
357 * just clear the stopping flag. Then we check if it was a
358 * firmware initiated stop, in which case we need to inform
360 * Note that we can have a stopping and a running scan
361 * simultaneously, but we can't have two different types of
362 * scans stopping or running at the same time (since LMAC
363 * doesn't support it).
366 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
367 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
369 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
370 aborted ? "aborted" : "completed",
371 ebs_successful ? "successful" : "failed");
373 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
374 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
375 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
376 aborted ? "aborted" : "completed",
377 ebs_successful ? "successful" : "failed");
379 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
380 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
381 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
383 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s (FW)\n",
384 aborted ? "aborted" : "completed",
385 ebs_successful ? "successful" : "failed");
387 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
388 ieee80211_sched_scan_stopped(mvm->hw);
389 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
390 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
391 aborted ? "aborted" : "completed",
392 ebs_successful ? "successful" : "failed");
394 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
395 ieee80211_scan_completed(mvm->hw,
396 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
397 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
400 mvm->last_ebs_successful = ebs_successful;
405 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
409 for (i = 0; i < PROBE_OPTION_MAX; i++) {
410 if (!ssid_list[i].len)
412 if (ssid_list[i].len == ssid_len &&
413 !memcmp(ssid_list->ssid, ssid, ssid_len))
419 /* We insert the SSIDs in an inverted order, because the FW will
422 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
423 struct iwl_ssid_ie *ssids,
430 * copy SSIDs from match list.
431 * iwl_config_sched_scan_profiles() uses the order of these ssids to
434 for (i = 0, j = params->n_match_sets - 1;
435 j >= 0 && i < PROBE_OPTION_MAX;
437 /* skip empty SSID matchsets */
438 if (!params->match_sets[j].ssid.ssid_len)
440 ssids[i].id = WLAN_EID_SSID;
441 ssids[i].len = params->match_sets[j].ssid.ssid_len;
442 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
446 /* add SSIDs from scan SSID list */
448 for (j = params->n_ssids - 1;
449 j >= 0 && i < PROBE_OPTION_MAX;
451 index = iwl_ssid_exist(params->ssids[j].ssid,
452 params->ssids[j].ssid_len,
455 ssids[i].id = WLAN_EID_SSID;
456 ssids[i].len = params->ssids[j].ssid_len;
457 memcpy(ssids[i].ssid, params->ssids[j].ssid,
459 *ssid_bitmap |= BIT(i);
461 *ssid_bitmap |= BIT(index);
466 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
467 struct cfg80211_sched_scan_request *req)
469 struct iwl_scan_offload_profile *profile;
470 struct iwl_scan_offload_profile_cfg *profile_cfg;
471 struct iwl_scan_offload_blacklist *blacklist;
472 struct iwl_host_cmd cmd = {
473 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
474 .len[1] = sizeof(*profile_cfg),
475 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
476 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
482 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
485 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
486 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
488 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
490 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
494 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
500 cmd.data[0] = blacklist;
501 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
502 cmd.data[1] = profile_cfg;
504 /* No blacklist configuration */
506 profile_cfg->num_profiles = req->n_match_sets;
507 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
508 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
509 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
510 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
511 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
513 for (i = 0; i < req->n_match_sets; i++) {
514 profile = &profile_cfg->profiles[i];
515 profile->ssid_index = i;
516 /* Support any cipher and auth algorithm */
517 profile->unicast_cipher = 0xff;
518 profile->auth_alg = 0xff;
519 profile->network_type = IWL_NETWORK_TYPE_ANY;
520 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
521 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
524 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
526 ret = iwl_mvm_send_cmd(mvm, &cmd);
534 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
535 struct cfg80211_sched_scan_request *req)
537 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
539 "Sending scheduled scan with filtering, n_match_sets %d\n",
544 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
548 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
551 struct iwl_host_cmd cmd = {
552 .id = SCAN_OFFLOAD_ABORT_CMD,
556 /* Exit instantly with error when device is not ready
557 * to receive scan abort command or it does not perform
558 * scheduled scan currently */
559 if (!mvm->scan_status)
562 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
566 if (status != CAN_ABORT_STATUS) {
568 * The scan abort will return 1 for success or
569 * 2 for "failure". A failure condition can be
570 * due to simply not being in an active scan which
571 * can occur if we send the scan abort before the
572 * microcode has notified us that a scan is completed.
574 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
581 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
584 struct iwl_notification_wait wait_scan_done;
585 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
586 bool sched = !!(mvm->scan_status & IWL_MVM_SCAN_SCHED);
588 lockdep_assert_held(&mvm->mutex);
590 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
591 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
594 /* FIXME: For now we only check if no scan is set here, since
595 * we only support LMAC in this flow and it doesn't support
598 if (!mvm->scan_status)
601 if (iwl_mvm_is_radio_killed(mvm)) {
606 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
608 ARRAY_SIZE(scan_done_notif),
611 ret = iwl_mvm_send_scan_offload_abort(mvm);
613 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
614 sched ? "offloaded " : "", ret);
615 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
619 IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
620 sched ? "scheduled " : "");
622 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
624 /* Clear the scan status so the next scan requests will
625 * succeed and mark the scan as stopping, so that the Rx
626 * handler doesn't do anything, as the scan was stopped from
627 * above. Since the rx handler won't do anything now, we have
628 * to release the scan reference here.
630 if (mvm->scan_status == IWL_MVM_SCAN_REGULAR)
631 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
634 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
635 mvm->scan_status |= IWL_MVM_SCAN_STOPPING_SCHED;
637 ieee80211_sched_scan_stopped(mvm->hw);
639 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
640 mvm->scan_status |= IWL_MVM_SCAN_STOPPING_REGULAR;
642 ieee80211_scan_completed(mvm->hw, true);
648 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
649 struct iwl_scan_req_tx_cmd *tx_cmd,
652 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
654 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
657 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
659 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
661 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
664 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
668 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
669 struct ieee80211_channel **channels,
670 int n_channels, u32 ssid_bitmap,
671 struct iwl_scan_req_lmac *cmd)
673 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
676 for (i = 0; i < n_channels; i++) {
677 channel_cfg[i].channel_num =
678 cpu_to_le16(channels[i]->hw_value);
679 channel_cfg[i].iter_count = cpu_to_le16(1);
680 channel_cfg[i].iter_interval = 0;
681 channel_cfg[i].flags =
682 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
687 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
688 size_t len, u8 *const pos)
690 static const u8 before_ds_params[] = {
694 WLAN_EID_EXT_SUPP_RATES,
699 if (!iwl_mvm_rrm_scan_needed(mvm)) {
700 memcpy(newpos, ies, len);
704 offs = ieee80211_ie_split(ies, len,
706 ARRAY_SIZE(before_ds_params),
709 memcpy(newpos, ies, offs);
712 /* Add a placeholder for DS Parameter Set element */
713 *newpos++ = WLAN_EID_DS_PARAMS;
717 memcpy(newpos, ies + offs, len - offs);
718 newpos += len - offs;
724 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
725 struct ieee80211_scan_ies *ies,
726 struct iwl_mvm_scan_params *params)
728 struct ieee80211_mgmt *frame = (void *)params->preq.buf;
730 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
731 params->mac_addr : NULL;
734 * Unfortunately, right now the offload scan doesn't support randomising
735 * within the firmware, so until the firmware API is ready we implement
736 * it in the driver. This means that the scan iterations won't really be
737 * random, only when it's restarted, but at least that helps a bit.
740 get_random_mask_addr(frame->sa, mac_addr,
741 params->mac_addr_mask);
743 memcpy(frame->sa, vif->addr, ETH_ALEN);
745 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
746 eth_broadcast_addr(frame->da);
747 eth_broadcast_addr(frame->bssid);
750 pos = frame->u.probe_req.variable;
751 *pos++ = WLAN_EID_SSID;
754 params->preq.mac_header.offset = 0;
755 params->preq.mac_header.len = cpu_to_le16(24 + 2);
757 /* Insert ds parameter set element on 2.4 GHz band */
758 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
759 ies->ies[IEEE80211_BAND_2GHZ],
760 ies->len[IEEE80211_BAND_2GHZ],
762 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
763 params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
766 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
767 ies->len[IEEE80211_BAND_5GHZ]);
768 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
769 params->preq.band_data[1].len =
770 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
771 pos += ies->len[IEEE80211_BAND_5GHZ];
773 memcpy(pos, ies->common_ies, ies->common_ie_len);
774 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
775 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
778 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
779 struct iwl_scan_req_lmac *cmd,
780 struct iwl_mvm_scan_params *params)
782 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
783 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
784 if (params->passive_fragmented)
785 cmd->fragmented_dwell =
786 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
787 cmd->max_out_time = cpu_to_le32(params->max_out_time);
788 cmd->suspend_time = cpu_to_le32(params->suspend_time);
789 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
792 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
793 struct ieee80211_scan_ies *ies,
796 return ((n_ssids <= PROBE_OPTION_MAX) &&
797 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
798 (ies->common_ie_len +
799 ies->len[NL80211_BAND_2GHZ] +
800 ies->len[NL80211_BAND_5GHZ] <=
801 iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
804 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, int n_iterations)
806 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
808 /* We can only use EBS if:
809 * 1. the feature is supported;
810 * 2. the last EBS was successful;
811 * 3. if only single scan, the single scan EBS API is supported.
813 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
814 mvm->last_ebs_successful &&
816 (capa->api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS)));
819 static int iwl_mvm_scan_total_iterations(struct iwl_mvm_scan_params *params)
821 return params->schedule[0].iterations + params->schedule[1].iterations;
824 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
825 struct iwl_mvm_scan_params *params)
829 if (params->n_ssids == 0)
830 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
832 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
833 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
835 if (params->passive_fragmented)
836 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
838 if (iwl_mvm_rrm_scan_needed(mvm))
839 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
841 if (params->pass_all)
842 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
844 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
846 #ifdef CONFIG_IWLWIFI_DEBUGFS
847 if (mvm->scan_iter_notif_enabled)
848 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
854 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
855 struct iwl_mvm_scan_params *params)
857 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
858 struct iwl_scan_probe_req *preq =
859 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
860 mvm->fw->ucode_capa.n_scan_channels);
862 int n_iterations = iwl_mvm_scan_total_iterations(params);
864 lockdep_assert_held(&mvm->mutex);
866 memset(cmd, 0, ksize(cmd));
868 iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
870 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
871 cmd->iter_num = cpu_to_le32(1);
872 cmd->n_channels = (u8)params->n_channels;
874 cmd->delay = cpu_to_le32(params->delay);
876 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params));
878 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
879 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
880 MAC_FILTER_IN_BEACON);
881 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
882 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
884 /* this API uses bits 1-20 instead of 0-19 */
887 cmd->schedule[0].delay = cpu_to_le16(params->interval);
888 cmd->schedule[0].iterations = params->schedule[0].iterations;
889 cmd->schedule[0].full_scan_mul = params->schedule[0].full_scan_mul;
890 cmd->schedule[1].delay = cpu_to_le16(params->interval);
891 cmd->schedule[1].iterations = params->schedule[1].iterations;
892 cmd->schedule[1].full_scan_mul = params->schedule[1].iterations;
894 if (iwl_mvm_scan_use_ebs(mvm, n_iterations)) {
895 cmd->channel_opt[0].flags =
896 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
897 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
898 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
899 cmd->channel_opt[0].non_ebs_ratio =
900 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
901 cmd->channel_opt[1].flags =
902 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
903 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
904 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
905 cmd->channel_opt[1].non_ebs_ratio =
906 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
909 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
910 params->n_channels, ssid_bitmap, cmd);
912 *preq = params->preq;
917 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
919 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
920 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN,
923 if (!(mvm->scan_status & IWL_MVM_SCAN_REGULAR))
926 if (iwl_mvm_is_radio_killed(mvm)) {
927 ieee80211_scan_completed(mvm->hw, true);
928 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
929 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
933 return iwl_mvm_scan_offload_stop(mvm, true);
938 struct iwl_umac_scan_done {
940 enum iwl_umac_scan_uid_type type;
943 static int rate_to_scan_rate_flag(unsigned int rate)
945 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
946 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
947 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
948 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
949 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
950 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
951 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
952 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
953 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
954 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
955 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
956 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
957 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
960 return rate_to_scan_rate[rate];
963 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
965 struct ieee80211_supported_band *band;
966 unsigned int rates = 0;
969 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
970 for (i = 0; i < band->n_bitrates; i++)
971 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
972 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
973 for (i = 0; i < band->n_bitrates; i++)
974 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
976 /* Set both basic rates and supported rates */
977 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
979 return cpu_to_le32(rates);
982 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
985 struct iwl_scan_config *scan_config;
986 struct ieee80211_supported_band *band;
988 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
989 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
990 int ret, i, j = 0, cmd_size, data_size;
991 struct iwl_host_cmd cmd = {
995 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
998 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
1000 scan_config = kzalloc(cmd_size, GFP_KERNEL);
1004 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
1005 scan_config->hdr.size = cpu_to_le16(data_size);
1006 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
1007 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1008 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1009 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1010 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1011 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1012 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1013 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
1014 SCAN_CONFIG_N_CHANNELS(num_channels));
1015 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1016 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1017 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1018 scan_config->out_of_channel_time = cpu_to_le32(170);
1019 scan_config->suspend_time = cpu_to_le32(30);
1020 scan_config->dwell_active = 20;
1021 scan_config->dwell_passive = 110;
1022 scan_config->dwell_fragmented = 20;
1024 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1026 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1027 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1028 IWL_CHANNEL_FLAG_ACCURATE_EBS |
1029 IWL_CHANNEL_FLAG_EBS_ADD |
1030 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1032 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1033 for (i = 0; i < band->n_channels; i++, j++)
1034 scan_config->channel_array[j] = band->channels[i].hw_value;
1035 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1036 for (i = 0; i < band->n_channels; i++, j++)
1037 scan_config->channel_array[j] = band->channels[i].hw_value;
1039 cmd.data[0] = scan_config;
1040 cmd.len[0] = cmd_size;
1041 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1043 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1045 ret = iwl_mvm_send_cmd(mvm, &cmd);
1051 static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1055 for (i = 0; i < mvm->max_scans; i++)
1056 if (mvm->scan_uid[i] == uid)
1062 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1064 return iwl_mvm_find_scan_uid(mvm, 0);
1067 static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm,
1068 enum iwl_umac_scan_uid_type type)
1072 for (i = 0; i < mvm->max_scans; i++)
1073 if (mvm->scan_uid[i] & type)
1079 static int iwl_mvm_find_first_scan(struct iwl_mvm *mvm,
1080 enum iwl_umac_scan_uid_type type)
1084 for (i = 0; i < mvm->max_scans; i++)
1085 if (mvm->scan_uid[i] & type)
1091 static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm,
1092 enum iwl_umac_scan_uid_type type)
1096 /* make sure exactly one bit is on in scan type */
1097 WARN_ON(hweight8(type) != 1);
1100 * Make sure scan uids are unique. If one scan lasts long time while
1101 * others are completing frequently, the seq number will wrap up and
1102 * we may have more than one scan with the same uid.
1105 uid = type | (mvm->scan_seq_num <<
1106 IWL_UMAC_SCAN_UID_SEQ_OFFSET);
1107 mvm->scan_seq_num++;
1108 } while (iwl_mvm_find_scan_uid(mvm, uid) < mvm->max_scans);
1110 IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
1115 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1116 struct iwl_scan_req_umac *cmd,
1117 struct iwl_mvm_scan_params *params)
1119 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1120 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1121 if (params->passive_fragmented)
1122 cmd->fragmented_dwell =
1123 params->dwell[IEEE80211_BAND_2GHZ].fragmented;
1124 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1125 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1126 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1128 if (iwl_mvm_scan_total_iterations(params) == 0)
1129 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1131 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1135 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1136 struct ieee80211_channel **channels,
1137 int n_channels, u32 ssid_bitmap,
1138 struct iwl_scan_req_umac *cmd)
1140 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1143 for (i = 0; i < n_channels; i++) {
1144 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1145 channel_cfg[i].channel_num = channels[i]->hw_value;
1146 channel_cfg[i].iter_count = 1;
1147 channel_cfg[i].iter_interval = 0;
1151 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1152 struct iwl_mvm_scan_params *params)
1156 if (params->n_ssids == 0)
1157 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1159 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1160 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1162 if (params->passive_fragmented)
1163 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1165 if (iwl_mvm_rrm_scan_needed(mvm))
1166 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1168 if (params->pass_all)
1169 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1171 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1173 if (iwl_mvm_scan_total_iterations(params) > 1)
1174 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1179 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1180 struct iwl_mvm_scan_params *params)
1182 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1183 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1184 sizeof(struct iwl_scan_channel_cfg_umac) *
1185 mvm->fw->ucode_capa.n_scan_channels;
1187 u32 ssid_bitmap = 0;
1188 int n_iterations = iwl_mvm_scan_total_iterations(params);
1191 lockdep_assert_held(&mvm->mutex);
1193 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1194 if (uid_idx >= mvm->max_scans)
1197 memset(cmd, 0, ksize(cmd));
1198 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1199 sizeof(struct iwl_mvm_umac_cmd_hdr));
1201 iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1203 if (n_iterations == 1)
1204 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1206 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN);
1208 mvm->scan_uid[uid_idx] = uid;
1209 cmd->uid = cpu_to_le32(uid);
1211 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params));
1213 if (iwl_mvm_scan_use_ebs(mvm, n_iterations))
1214 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1215 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1216 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1218 cmd->n_channels = params->n_channels;
1220 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1222 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1223 params->n_channels, ssid_bitmap, cmd);
1225 /* With UMAC we can have only one schedule, so use the sum of
1226 * the iterations (with a a maximum of 255).
1228 sec_part->schedule[0].iter_count =
1229 (n_iterations > 255) ? 255 : n_iterations;
1230 sec_part->schedule[0].interval = cpu_to_le16(params->interval);
1232 sec_part->delay = cpu_to_le16(params->delay);
1233 sec_part->preq = params->preq;
1238 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1240 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1243 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1245 /* This looks a bit arbitrary, but the idea is that if we run
1246 * out of possible simultaneous scans and the userspace is
1247 * trying to run a scan type that is already running, we
1248 * return -EBUSY. But if the userspace wants to start a
1249 * different type of scan, we stop the opposite type to make
1250 * space for the new request. The reason is backwards
1251 * compatibility with old wpa_supplicant that wouldn't stop a
1252 * scheduled scan before starting a normal scan.
1255 if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1258 /* Use a switch, even though this is a bitmask, so that more
1259 * than one bits set will fall in default and we will warn.
1262 case IWL_MVM_SCAN_REGULAR:
1263 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1265 return iwl_mvm_scan_offload_stop(mvm, true);
1266 case IWL_MVM_SCAN_SCHED:
1267 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1269 return iwl_mvm_cancel_scan(mvm);
1270 case IWL_MVM_SCAN_NETDETECT:
1271 /* No need to stop anything for net-detect since the
1272 * firmware is restarted anyway. This way, any sched
1273 * scans that were running will be restarted when we
1285 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1286 struct cfg80211_scan_request *req,
1287 struct ieee80211_scan_ies *ies)
1289 struct iwl_host_cmd hcmd = {
1290 .len = { iwl_mvm_scan_size(mvm), },
1291 .data = { mvm->scan_cmd, },
1292 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1294 struct iwl_mvm_scan_params params = {};
1297 lockdep_assert_held(&mvm->mutex);
1299 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1300 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1304 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1308 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1310 /* we should have failed registration if scan_cmd was NULL */
1311 if (WARN_ON(!mvm->scan_cmd))
1314 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1317 params.n_ssids = req->n_ssids;
1318 params.flags = req->flags;
1319 params.n_channels = req->n_channels;
1321 params.interval = 0;
1322 params.ssids = req->ssids;
1323 params.channels = req->channels;
1324 params.mac_addr = req->mac_addr;
1325 params.mac_addr_mask = req->mac_addr_mask;
1326 params.no_cck = req->no_cck;
1327 params.pass_all = true;
1328 params.n_match_sets = 0;
1329 params.match_sets = NULL;
1331 params.schedule[0].iterations = 1;
1332 params.schedule[0].full_scan_mul = 0;
1333 params.schedule[1].iterations = 0;
1334 params.schedule[1].full_scan_mul = 0;
1336 iwl_mvm_scan_calc_dwell(mvm, vif, ¶ms);
1338 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms);
1340 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1341 hcmd.id = SCAN_REQ_UMAC;
1342 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms);
1344 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1345 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms);
1351 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1353 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1354 mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1356 /* If the scan failed, it usually means that the FW was unable
1357 * to allocate the time events. Warn on it, but maybe we
1358 * should try to send the command again with different params.
1360 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1364 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1369 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1370 struct ieee80211_vif *vif,
1371 struct cfg80211_sched_scan_request *req,
1372 struct ieee80211_scan_ies *ies,
1375 struct iwl_host_cmd hcmd = {
1376 .len = { iwl_mvm_scan_size(mvm), },
1377 .data = { mvm->scan_cmd, },
1378 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1380 struct iwl_mvm_scan_params params = {};
1383 lockdep_assert_held(&mvm->mutex);
1385 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1386 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1390 ret = iwl_mvm_check_running_scans(mvm, type);
1394 /* we should have failed registration if scan_cmd was NULL */
1395 if (WARN_ON(!mvm->scan_cmd))
1398 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1401 params.n_ssids = req->n_ssids;
1402 params.flags = req->flags;
1403 params.n_channels = req->n_channels;
1404 params.ssids = req->ssids;
1405 params.channels = req->channels;
1406 params.mac_addr = req->mac_addr;
1407 params.mac_addr_mask = req->mac_addr_mask;
1408 params.no_cck = false;
1409 params.pass_all = iwl_mvm_scan_pass_all(mvm, req);
1410 params.n_match_sets = req->n_match_sets;
1411 params.match_sets = req->match_sets;
1413 params.schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1414 params.schedule[0].full_scan_mul = 1;
1415 params.schedule[1].iterations = 0xff;
1416 params.schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1418 if (req->interval > U16_MAX) {
1420 "interval value is > 16-bits, set to max possible\n");
1421 params.interval = U16_MAX;
1423 params.interval = req->interval / MSEC_PER_SEC;
1426 /* In theory, LMAC scans can handle a 32-bit delay, but since
1427 * waiting for over 18 hours to start the scan is a bit silly
1428 * and to keep it aligned with UMAC scans (which only support
1429 * 16-bit delays), trim it down to 16-bits.
1431 if (req->delay > U16_MAX) {
1433 "delay value is > 16-bits, set to max possible\n");
1434 params.delay = U16_MAX;
1436 params.delay = req->delay;
1439 iwl_mvm_scan_calc_dwell(mvm, vif, ¶ms);
1441 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1445 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms);
1447 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1448 hcmd.id = SCAN_REQ_UMAC;
1449 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms);
1451 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1452 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms);
1458 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1461 "Sched scan request was sent successfully\n");
1462 mvm->scan_status |= type;
1464 /* If the scan failed, it usually means that the FW was unable
1465 * to allocate the time events. Warn on it, but maybe we
1466 * should try to send the command again with different params.
1468 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1474 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1475 struct iwl_rx_cmd_buffer *rxb,
1476 struct iwl_device_cmd *cmd)
1478 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1479 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1480 u32 uid = __le32_to_cpu(notif->uid);
1481 bool sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN);
1482 int uid_idx = iwl_mvm_find_scan_uid(mvm, uid);
1485 * Scan uid may be set to zero in case of scan abort request from above.
1487 if (uid_idx >= mvm->max_scans)
1491 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
1492 uid, sched ? "sched" : "regular",
1493 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1494 "completed" : "aborted",
1495 notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
1496 "success" : "failed");
1498 if (notif->ebs_status)
1499 mvm->last_ebs_successful = false;
1501 mvm->scan_uid[uid_idx] = 0;
1504 ieee80211_scan_completed(mvm->hw,
1506 IWL_SCAN_OFFLOAD_ABORTED);
1507 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1508 } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) {
1509 ieee80211_sched_scan_stopped(mvm->hw);
1511 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
1517 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
1518 struct iwl_rx_packet *pkt, void *data)
1520 struct iwl_umac_scan_done *scan_done = data;
1521 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1522 u32 uid = __le32_to_cpu(notif->uid);
1523 int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid);
1525 if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
1528 if (uid_idx >= scan_done->mvm->max_scans)
1532 * Clear scan uid of scans that was aborted from above and completed
1533 * in FW so the RX handler does nothing. Set last_ebs_successful here if
1536 scan_done->mvm->scan_uid[uid_idx] = 0;
1538 if (notif->ebs_status)
1539 scan_done->mvm->last_ebs_successful = false;
1541 return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
1544 static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
1546 struct iwl_umac_scan_abort cmd = {
1547 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
1548 sizeof(struct iwl_mvm_umac_cmd_hdr)),
1549 .uid = cpu_to_le32(uid),
1552 lockdep_assert_held(&mvm->mutex);
1554 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1556 return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
1559 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
1560 enum iwl_umac_scan_uid_type type, bool notify)
1562 struct iwl_notification_wait wait_scan_done;
1563 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, };
1564 struct iwl_umac_scan_done scan_done = {
1570 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1572 ARRAY_SIZE(scan_done_notif),
1573 iwl_scan_umac_done_check, &scan_done);
1575 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1577 for (i = 0; i < mvm->max_scans; i++) {
1578 if (mvm->scan_uid[i] & type) {
1581 if (iwl_mvm_is_radio_killed(mvm) &&
1582 (type & IWL_UMAC_SCAN_UID_REG_SCAN)) {
1583 ieee80211_scan_completed(mvm->hw, true);
1584 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1588 err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
1595 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
1596 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1600 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1605 if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN)
1606 ieee80211_sched_scan_stopped(mvm->hw);
1607 if (type & IWL_UMAC_SCAN_UID_REG_SCAN) {
1608 ieee80211_scan_completed(mvm->hw, true);
1609 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1616 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1618 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1619 return sizeof(struct iwl_scan_req_umac) +
1620 sizeof(struct iwl_scan_channel_cfg_umac) *
1621 mvm->fw->ucode_capa.n_scan_channels +
1622 sizeof(struct iwl_scan_req_umac_tail);
1624 return sizeof(struct iwl_scan_req_lmac) +
1625 sizeof(struct iwl_scan_channel_cfg_lmac) *
1626 mvm->fw->ucode_capa.n_scan_channels +
1627 sizeof(struct iwl_scan_probe_req);
1631 * This function is used in nic restart flow, to inform mac80211 about scans
1632 * that was aborted by restart flow or by an assert.
1634 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1636 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1639 uid = iwl_mvm_find_first_scan(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1640 if (uid < mvm->max_scans) {
1641 ieee80211_scan_completed(mvm->hw, true);
1642 mvm->scan_uid[uid] = 0;
1644 uid = iwl_mvm_find_first_scan(mvm,
1645 IWL_UMAC_SCAN_UID_SCHED_SCAN);
1646 if (uid < mvm->max_scans && !mvm->restart_fw) {
1647 ieee80211_sched_scan_stopped(mvm->hw);
1648 mvm->scan_uid[uid] = 0;
1651 /* We shouldn't have any UIDs still set. Loop over all the
1652 * UIDs to make sure there's nothing left there and warn if
1655 for (i = 0; i < mvm->max_scans; i++) {
1656 if (WARN_ONCE(mvm->scan_uid[i],
1657 "UMAC scan UID %d was not cleaned\n",
1659 mvm->scan_uid[i] = 0;
1662 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1663 ieee80211_scan_completed(mvm->hw, true);
1665 /* Sched scan will be restarted by mac80211 in
1666 * restart_hw, so do not report if FW is about to be
1669 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && !mvm->restart_fw)
1670 ieee80211_sched_scan_stopped(mvm->hw);