1 /******************************************************************************
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64 *****************************************************************************/
66 #include <linux/etherdevice.h>
67 #include <net/mac80211.h>
70 #include "iwl-eeprom-parse.h"
71 #include "fw-api-scan.h"
73 #define IWL_PLCP_QUIET_THRESH 1
74 #define IWL_ACTIVE_QUIET_TIME 10
75 #define IWL_DENSE_EBS_SCAN_RATIO 5
76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
78 struct iwl_mvm_scan_params {
81 bool passive_fragmented;
85 } dwell[IEEE80211_NUM_BANDS];
88 enum iwl_umac_scan_uid_type {
89 IWL_UMAC_SCAN_UID_REG_SCAN = BIT(0),
90 IWL_UMAC_SCAN_UID_SCHED_SCAN = BIT(1),
91 IWL_UMAC_SCAN_UID_ALL = IWL_UMAC_SCAN_UID_REG_SCAN |
92 IWL_UMAC_SCAN_UID_SCHED_SCAN,
95 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
96 enum iwl_umac_scan_uid_type type, bool notify);
98 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
100 if (mvm->scan_rx_ant != ANT_NONE)
101 return mvm->scan_rx_ant;
102 return iwl_mvm_get_valid_rx_ant(mvm);
105 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
110 rx_ant = iwl_mvm_scan_rx_ant(mvm);
111 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
112 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
113 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
114 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
115 return cpu_to_le16(rx_chain);
118 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
120 if (band == IEEE80211_BAND_2GHZ)
121 return cpu_to_le32(PHY_BAND_24);
123 return cpu_to_le32(PHY_BAND_5);
127 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
132 mvm->scan_last_antenna_idx =
133 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
134 mvm->scan_last_antenna_idx);
135 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
137 if (band == IEEE80211_BAND_2GHZ && !no_cck)
138 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
141 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
145 * We insert the SSIDs in an inverted order, because the FW will
146 * invert it back. The most prioritized SSID, which is first in the
147 * request list, is not copied here, but inserted directly to the probe
150 static void iwl_mvm_scan_fill_ssids(struct iwl_ssid_ie *cmd_ssid,
151 struct cfg80211_ssid *ssids,
152 int n_ssids, int first)
156 for (req_idx = n_ssids - 1, fw_idx = 0; req_idx >= first;
157 req_idx--, fw_idx++) {
158 cmd_ssid[fw_idx].id = WLAN_EID_SSID;
159 cmd_ssid[fw_idx].len = ssids[req_idx].ssid_len;
160 memcpy(cmd_ssid[fw_idx].ssid,
162 ssids[req_idx].ssid_len);
167 * If req->n_ssids > 0, it means we should do an active scan.
168 * In case of active scan w/o directed scan, we receive a zero-length SSID
169 * just to notify that this scan is active and not passive.
170 * In order to notify the FW of the number of SSIDs we wish to scan (including
171 * the zero-length one), we need to set the corresponding bits in chan->type,
172 * one for each SSID, and set the active bit (first). If the first SSID is
173 * already included in the probe template, so we need to set only
174 * req->n_ssids - 1 bits in addition to the first bit.
176 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
177 enum ieee80211_band band, int n_ssids)
179 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
181 if (band == IEEE80211_BAND_2GHZ)
182 return 20 + 3 * (n_ssids + 1);
183 return 10 + 2 * (n_ssids + 1);
186 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
187 enum ieee80211_band band)
189 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
191 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
194 static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd,
195 struct cfg80211_scan_request *req,
197 struct iwl_mvm_scan_params *params)
199 struct iwl_scan_channel *chan = (struct iwl_scan_channel *)
200 (cmd->data + le16_to_cpu(cmd->tx_cmd.len));
202 int type = BIT(req->n_ssids) - 1;
203 enum ieee80211_band band = req->channels[0]->band;
206 type |= BIT(req->n_ssids);
208 for (i = 0; i < cmd->channel_count; i++) {
209 chan->channel = cpu_to_le16(req->channels[i]->hw_value);
210 chan->type = cpu_to_le32(type);
211 if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR)
212 chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE);
213 chan->active_dwell = cpu_to_le16(params->dwell[band].active);
214 chan->passive_dwell = cpu_to_le16(params->dwell[band].passive);
215 chan->iteration_count = cpu_to_le16(1);
221 * Fill in probe request with the following parameters:
222 * TA is our vif HW address, which mac80211 ensures we have.
223 * Packet is broadcasted, so this is both SA and DA.
224 * The probe request IE is made out of two: first comes the most prioritized
225 * SSID if a directed scan is requested. Second comes whatever extra
226 * information was given to us as the scan request IE.
228 static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
229 int n_ssids, const u8 *ssid, int ssid_len,
230 const u8 *band_ie, int band_ie_len,
231 const u8 *common_ie, int common_ie_len,
237 /* Make sure there is enough space for the probe request,
238 * two mandatory IEs and the data */
243 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
244 eth_broadcast_addr(frame->da);
245 memcpy(frame->sa, ta, ETH_ALEN);
246 eth_broadcast_addr(frame->bssid);
251 /* for passive scans, no need to fill anything */
255 /* points to the payload of the request */
256 pos = &frame->u.probe_req.variable[0];
258 /* fill in our SSID IE */
259 left -= ssid_len + 2;
262 *pos++ = WLAN_EID_SSID;
264 if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */
265 memcpy(pos, ssid, ssid_len);
271 if (WARN_ON(left < band_ie_len + common_ie_len))
274 if (band_ie && band_ie_len) {
275 memcpy(pos, band_ie, band_ie_len);
280 if (common_ie && common_ie_len) {
281 memcpy(pos, common_ie, common_ie_len);
282 pos += common_ie_len;
283 len += common_ie_len;
289 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
290 struct ieee80211_vif *vif)
292 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
293 int *global_cnt = data;
295 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
296 mvmvif->phy_ctxt->id < MAX_PHYS)
300 static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
301 struct ieee80211_vif *vif,
302 int n_ssids, u32 flags,
303 struct iwl_mvm_scan_params *params)
306 enum ieee80211_band band;
307 u8 frag_passive_dwell = 0;
309 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
310 IEEE80211_IFACE_ITER_NORMAL,
311 iwl_mvm_scan_condition_iterator,
317 params->suspend_time = 30;
318 params->max_out_time = 120;
320 if (iwl_mvm_low_latency(mvm)) {
321 if (mvm->fw->ucode_capa.api[0] &
322 IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
323 params->suspend_time = 105;
325 * If there is more than one active interface make
326 * passive scan more fragmented.
328 frag_passive_dwell = (global_cnt < 2) ? 40 : 20;
329 params->max_out_time = frag_passive_dwell;
331 params->suspend_time = 120;
332 params->max_out_time = 120;
336 if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
337 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
339 * P2P device scan should not be fragmented to avoid negative
340 * impact on P2P device discovery. Configure max_out_time to be
341 * equal to dwell time on passive channel. Take a longest
342 * possible value, one that corresponds to 2GHz band
344 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
346 iwl_mvm_get_passive_dwell(mvm,
347 IEEE80211_BAND_2GHZ);
348 params->max_out_time = passive_dwell;
350 params->passive_fragmented = true;
354 if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
355 params->max_out_time = 200;
359 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
360 if (params->passive_fragmented)
361 params->dwell[band].passive = frag_passive_dwell;
363 params->dwell[band].passive =
364 iwl_mvm_get_passive_dwell(mvm, band);
365 params->dwell[band].active = iwl_mvm_get_active_dwell(mvm, band,
370 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
372 /* require rrm scan whenever the fw supports it */
373 return mvm->fw->ucode_capa.capa[0] &
374 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
377 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm,
382 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
383 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
385 max_probe_len = mvm->fw->ucode_capa.max_probe_length;
387 /* we create the 802.11 header and SSID element */
388 max_probe_len -= 24 + 2;
390 /* basic ssid is added only for hw_scan with and old api */
391 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) &&
392 !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) &&
396 /* DS parameter set element is added on 2.4GHZ band if required */
397 if (iwl_mvm_rrm_scan_needed(mvm))
400 return max_probe_len;
403 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan)
405 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan);
407 if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN))
410 /* TODO: [BUG] This function should return the maximum allowed size of
411 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
412 * in the same command. So the correct implementation of this function
413 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
414 * command has only 512 bytes and it would leave us with about 240
415 * bytes for scan IEs, which is clearly not enough. So meanwhile
416 * we will report an incorrect value. This may result in a failure to
417 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
418 * functions with -ENOBUFS, if a large enough probe will be provided.
423 int iwl_mvm_scan_request(struct iwl_mvm *mvm,
424 struct ieee80211_vif *vif,
425 struct cfg80211_scan_request *req)
427 struct iwl_host_cmd hcmd = {
428 .id = SCAN_REQUEST_CMD,
430 .data = { mvm->scan_cmd, },
431 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
433 struct iwl_scan_cmd *cmd = mvm->scan_cmd;
438 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
439 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
440 struct iwl_mvm_scan_params params = {};
442 lockdep_assert_held(&mvm->mutex);
444 /* we should have failed registration if scan_cmd was NULL */
445 if (WARN_ON(mvm->scan_cmd == NULL))
448 IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
449 mvm->scan_status = IWL_MVM_SCAN_OS;
450 memset(cmd, 0, ksize(cmd));
452 cmd->channel_count = (u8)req->n_channels;
453 cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
454 cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
455 cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
457 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, ¶ms);
458 cmd->max_out_time = cpu_to_le32(params.max_out_time);
459 cmd->suspend_time = cpu_to_le32(params.suspend_time);
460 if (params.passive_fragmented)
461 cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
463 cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
464 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
465 MAC_FILTER_IN_BEACON);
467 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
468 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
470 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
472 cmd->repeats = cpu_to_le32(1);
475 * If the user asked for passive scan, don't change to active scan if
476 * you see any activity on the channel - remain passive.
478 if (req->n_ssids > 0) {
479 cmd->passive2active = cpu_to_le16(1);
480 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
482 ssid = req->ssids[0].ssid;
483 ssid_len = req->ssids[0].ssid_len;
486 cmd->passive2active = 0;
487 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
490 iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids,
493 cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
494 3 << TX_CMD_FLG_BT_PRIO_POS);
496 cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
497 cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
498 cmd->tx_cmd.rate_n_flags =
499 iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
503 cpu_to_le16(iwl_mvm_fill_probe_req(
504 (struct ieee80211_mgmt *)cmd->data,
506 req->n_ssids, ssid, ssid_len,
507 req->ie, req->ie_len, NULL, 0,
508 mvm->fw->ucode_capa.max_probe_length));
510 iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, ¶ms);
512 cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
513 le16_to_cpu(cmd->tx_cmd.len) +
514 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
515 hcmd.len[0] = le16_to_cpu(cmd->len);
517 status = SCAN_RESPONSE_OK;
518 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
519 if (!ret && status == SCAN_RESPONSE_OK) {
520 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
523 * If the scan failed, it usually means that the FW was unable
524 * to allocate the time events. Warn on it, but maybe we
525 * should try to send the command again with different params.
527 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
529 mvm->scan_status = IWL_MVM_SCAN_NONE;
535 int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
536 struct iwl_device_cmd *cmd)
538 struct iwl_rx_packet *pkt = rxb_addr(rxb);
539 struct iwl_cmd_response *resp = (void *)pkt->data;
541 IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
542 le32_to_cpu(resp->status));
546 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm,
547 struct iwl_rx_cmd_buffer *rxb,
548 struct iwl_device_cmd *cmd)
550 struct iwl_rx_packet *pkt = rxb_addr(rxb);
551 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
554 "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
555 notif->status, notif->scanned_channels);
559 int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
560 struct iwl_device_cmd *cmd)
562 struct iwl_rx_packet *pkt = rxb_addr(rxb);
563 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
565 lockdep_assert_held(&mvm->mutex);
567 IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
568 notif->status, notif->scanned_channels);
570 if (mvm->scan_status == IWL_MVM_SCAN_OS)
571 mvm->scan_status = IWL_MVM_SCAN_NONE;
572 ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
574 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
579 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
580 struct iwl_rx_cmd_buffer *rxb,
581 struct iwl_device_cmd *cmd)
583 struct iwl_rx_packet *pkt = rxb_addr(rxb);
585 if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
586 !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
587 struct iwl_sched_scan_results *notif = (void *)pkt->data;
589 if (!(notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN))
593 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
594 ieee80211_sched_scan_results(mvm->hw);
599 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
600 struct iwl_rx_packet *pkt, void *data)
602 struct iwl_mvm *mvm =
603 container_of(notif_wait, struct iwl_mvm, notif_wait);
604 struct iwl_scan_complete_notif *notif;
607 switch (pkt->hdr.cmd) {
609 resp = (void *)pkt->data;
610 if (*resp == CAN_ABORT_STATUS) {
612 "Scan can be aborted, wait until completion\n");
617 * If scan cannot be aborted, it means that we had a
618 * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
619 * ieee80211_scan_completed already.
621 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
625 case SCAN_COMPLETE_NOTIFICATION:
626 notif = (void *)pkt->data;
627 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
637 static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm)
639 struct iwl_notification_wait wait_scan_abort;
640 static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
641 SCAN_COMPLETE_NOTIFICATION };
644 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
646 ARRAY_SIZE(scan_abort_notif),
647 iwl_mvm_scan_abort_notif, NULL);
649 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
651 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
652 /* mac80211's state will be cleaned in the nic_restart flow */
653 goto out_remove_notif;
656 return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
659 iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
663 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
664 struct iwl_rx_cmd_buffer *rxb,
665 struct iwl_device_cmd *cmd)
667 struct iwl_rx_packet *pkt = rxb_addr(rxb);
668 u8 status, ebs_status;
670 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
671 struct iwl_periodic_scan_complete *scan_notif;
673 scan_notif = (void *)pkt->data;
674 status = scan_notif->status;
675 ebs_status = scan_notif->ebs_status;
677 struct iwl_scan_offload_complete *scan_notif;
679 scan_notif = (void *)pkt->data;
680 status = scan_notif->status;
681 ebs_status = scan_notif->ebs_status;
683 /* scan status must be locked for proper checking */
684 lockdep_assert_held(&mvm->mutex);
687 "%s completed, status %s, EBS status %s\n",
688 mvm->scan_status == IWL_MVM_SCAN_SCHED ?
689 "Scheduled scan" : "Scan",
690 status == IWL_SCAN_OFFLOAD_COMPLETED ?
691 "completed" : "aborted",
692 ebs_status == IWL_SCAN_EBS_SUCCESS ?
693 "success" : "failed");
696 /* only call mac80211 completion if the stop was initiated by FW */
697 if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
698 mvm->scan_status = IWL_MVM_SCAN_NONE;
699 ieee80211_sched_scan_stopped(mvm->hw);
700 } else if (mvm->scan_status == IWL_MVM_SCAN_OS) {
701 mvm->scan_status = IWL_MVM_SCAN_NONE;
702 ieee80211_scan_completed(mvm->hw,
703 status == IWL_SCAN_OFFLOAD_ABORTED);
704 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
708 mvm->last_ebs_successful = false;
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,
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;
726 cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
728 cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
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);
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)
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);
749 scan->max_out_time = cpu_to_le32(params->max_out_time);
750 scan->suspend_time = cpu_to_le32(params->suspend_time);
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);
757 if (params->passive_fragmented)
758 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
761 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
765 for (i = 0; i < PROBE_OPTION_MAX; i++) {
766 if (!ssid_list[i].len)
768 if (ssid_list[i].len == ssid_len &&
769 !memcmp(ssid_list->ssid, ssid, ssid_len))
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)
783 * copy SSIDs from match list.
784 * iwl_config_sched_scan_profiles() uses the order of these ssids to
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)
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,
797 /* add SSIDs from scan SSID list */
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,
804 if (!req->ssids[j].ssid_len && basic_ssid)
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,
810 *ssid_bitmap |= BIT(i + 1);
813 *ssid_bitmap |= BIT(index + 1);
818 static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
819 struct cfg80211_sched_scan_request *req,
821 enum ieee80211_band band,
824 struct iwl_mvm_scan_params *params)
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;
835 for (i = 0; i < req->n_channels; i++) {
836 struct ieee80211_channel *chan = req->channels[i];
838 if (chan->band != band)
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;
848 iter_count[index] = cpu_to_le16(1);
849 iter_interval[index] = 0;
851 if (!(chan->flags & IEEE80211_CHAN_NO_IR))
853 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
855 type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL |
856 IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
858 if (chan->flags & IEEE80211_CHAN_NO_HT40)
860 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
862 /* scan for all SSIDs from req->ssids */
863 type[index] |= cpu_to_le32(ssid_bitmap);
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)
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;
879 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
880 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
882 struct iwl_scan_offload_cfg *scan_cfg;
883 struct iwl_host_cmd cmd = {
884 .id = SCAN_OFFLOAD_CONFIG_CMD,
886 struct iwl_mvm_scan_params params = {};
888 lockdep_assert_held(&mvm->mutex);
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;
894 scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
898 probes = scan_cfg->data +
899 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE;
901 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, ¶ms);
902 iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, ¶ms);
903 scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
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 */
909 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
911 &scan_cfg->scan_cmd.tx_cmd[0],
913 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
914 IEEE80211_BAND_2GHZ, &head,
915 ssid_bitmap, ¶ms);
918 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
920 &scan_cfg->scan_cmd.tx_cmd[1],
922 SCAN_OFFLOAD_PROBE_REQ_SIZE);
923 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
924 IEEE80211_BAND_5GHZ, &head,
925 ssid_bitmap, ¶ms);
928 cmd.data[0] = scan_cfg;
929 cmd.len[0] = cmd_len;
930 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
932 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
934 ret = iwl_mvm_send_cmd(mvm, &cmd);
939 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
940 struct cfg80211_sched_scan_request *req)
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,
955 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
958 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
959 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
961 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
963 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
967 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
973 cmd.data[0] = blacklist;
974 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
975 cmd.data[1] = profile_cfg;
977 /* No blacklist configuration */
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;
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;
997 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
999 ret = iwl_mvm_send_cmd(mvm, &cmd);
1007 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
1008 struct cfg80211_sched_scan_request *req)
1010 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
1012 "Sending scheduled scan with filtering, n_match_sets %d\n",
1017 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
1021 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1022 struct cfg80211_sched_scan_request *req)
1024 struct iwl_scan_offload_req scan_req = {
1025 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
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,
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,
1036 if (iwl_mvm_scan_pass_all(mvm, req))
1037 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
1039 if (mvm->last_ebs_successful &&
1040 mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
1042 cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
1044 return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
1045 sizeof(scan_req), &scan_req);
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)
1055 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1056 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
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);
1065 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
1067 mvm->scan_status = IWL_MVM_SCAN_SCHED;
1068 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1071 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1074 ret = iwl_mvm_sched_scan_start(mvm, req);
1080 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
1083 struct iwl_host_cmd cmd = {
1084 .id = SCAN_OFFLOAD_ABORT_CMD,
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))
1096 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
1100 if (status != CAN_ABORT_STATUS) {
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.
1108 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
1115 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
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;
1122 lockdep_assert_held(&mvm->mutex);
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,
1128 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1131 if (iwl_mvm_is_radio_killed(mvm)) {
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");
1143 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1145 ARRAY_SIZE(scan_done_notif),
1148 ret = iwl_mvm_send_scan_offload_abort(mvm);
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);
1156 IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
1157 sched ? "offloaded " : "");
1159 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
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.
1167 if (mvm->scan_status == IWL_MVM_SCAN_OS)
1168 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1170 mvm->scan_status = IWL_MVM_SCAN_NONE;
1174 ieee80211_sched_scan_stopped(mvm->hw);
1176 ieee80211_scan_completed(mvm->hw, true);
1182 static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm *mvm,
1183 struct iwl_scan_req_tx_cmd *tx_cmd,
1186 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1188 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1189 IEEE80211_BAND_2GHZ,
1191 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
1193 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1195 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1196 IEEE80211_BAND_5GHZ,
1198 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
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)
1207 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
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 |
1221 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
1222 size_t len, u8 *const pos)
1224 static const u8 before_ds_params[] = {
1226 WLAN_EID_SUPP_RATES,
1228 WLAN_EID_EXT_SUPP_RATES,
1233 if (!iwl_mvm_rrm_scan_needed(mvm)) {
1234 memcpy(newpos, ies, len);
1235 return newpos + len;
1238 offs = ieee80211_ie_split(ies, len,
1240 ARRAY_SIZE(before_ds_params),
1243 memcpy(newpos, ies, offs);
1246 /* Add a placeholder for DS Parameter Set element */
1247 *newpos++ = WLAN_EID_DS_PARAMS;
1251 memcpy(newpos, ies + offs, len - offs);
1252 newpos += len - offs;
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)
1263 struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
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.
1273 get_random_mask_addr(frame->sa, mac_addr, mac_addr_mask);
1275 memcpy(frame->sa, vif->addr, ETH_ALEN);
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;
1282 pos = frame->u.probe_req.variable;
1283 *pos++ = WLAN_EID_SSID;
1286 preq->mac_header.offset = 0;
1287 preq->mac_header.len = cpu_to_le16(24 + 2);
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],
1294 preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
1295 preq->band_data[0].len = cpu_to_le16(newpos - pos);
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];
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);
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)
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);
1326 if (iwl_mvm_rrm_scan_needed(mvm))
1328 cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
1331 int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
1332 struct ieee80211_vif *vif,
1333 struct ieee80211_scan_request *req)
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, },
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 = {};
1348 u32 ssid_bitmap = 0;
1351 lockdep_assert_held(&mvm->mutex);
1353 /* we should have failed registration if scan_cmd was NULL */
1354 if (WARN_ON(mvm->scan_cmd == NULL))
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)
1364 mvm->scan_status = IWL_MVM_SCAN_OS;
1366 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1369 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, ¶ms);
1371 cmd->n_channels = (u8)req->req.n_channels;
1373 flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1375 if (req->req.n_ssids == 1 && req->req.ssids[0].ssid_len != 0)
1376 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1378 if (params.passive_fragmented)
1379 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1381 if (req->req.n_ssids == 0)
1382 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1384 cmd->scan_flags |= cpu_to_le32(flags);
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);
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;
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);
1416 for (i = 1; i <= req->req.n_ssids; i++)
1417 ssid_bitmap |= BIT(i);
1419 iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels,
1420 req->req.n_channels, ssid_bitmap,
1423 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1424 mvm->fw->ucode_capa.n_scan_channels);
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);
1431 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1433 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
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.
1440 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1441 mvm->scan_status = IWL_MVM_SCAN_NONE;
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)
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, },
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 = {};
1465 u32 flags = 0, ssid_bitmap = 0;
1467 lockdep_assert_held(&mvm->mutex);
1469 /* we should have failed registration if scan_cmd was NULL */
1470 if (WARN_ON(mvm->scan_cmd == NULL))
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)
1480 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, ¶ms);
1482 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, ¶ms);
1484 cmd->n_channels = (u8)req->n_channels;
1486 if (iwl_mvm_scan_pass_all(mvm, req))
1487 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1489 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
1491 if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0)
1492 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1494 if (params.passive_fragmented)
1495 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1497 if (req->n_ssids == 0)
1498 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1500 #ifdef CONFIG_IWLWIFI_DEBUGFS
1501 if (mvm->scan_iter_notif_enabled)
1502 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
1505 cmd->scan_flags |= cpu_to_le32(flags);
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);
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;
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;
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);
1537 iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1540 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1541 mvm->fw->ucode_capa.n_scan_channels);
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);
1548 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1551 "Sched scan request was sent successfully\n");
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.
1558 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1559 mvm->scan_status = IWL_MVM_SCAN_NONE;
1566 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
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,
1572 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
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;
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);
1589 struct iwl_umac_scan_done {
1590 struct iwl_mvm *mvm;
1591 enum iwl_umac_scan_uid_type type;
1594 static int rate_to_scan_rate_flag(unsigned int rate)
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,
1611 return rate_to_scan_rate[rate];
1614 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1616 struct ieee80211_supported_band *band;
1617 unsigned int rates = 0;
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);
1627 /* Set both basic rates and supported rates */
1628 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1630 return cpu_to_le32(rates);
1633 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1636 struct iwl_scan_config *scan_config;
1637 struct ieee80211_supported_band *band;
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 = {
1646 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1649 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
1651 scan_config = kzalloc(cmd_size, GFP_KERNEL);
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;
1675 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
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;
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;
1690 cmd.data[0] = scan_config;
1691 cmd.len[0] = cmd_size;
1692 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1694 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1696 ret = iwl_mvm_send_cmd(mvm, &cmd);
1702 static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1706 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1707 if (mvm->scan_uid[i] == uid)
1713 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1715 return iwl_mvm_find_scan_uid(mvm, 0);
1718 static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm,
1719 enum iwl_umac_scan_uid_type type)
1723 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1724 if (mvm->scan_uid[i] & type)
1730 static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm,
1731 enum iwl_umac_scan_uid_type type)
1735 /* make sure exactly one bit is on in scan type */
1736 WARN_ON(hweight8(type) != 1);
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.
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);
1750 IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
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)
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);
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)
1779 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
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;
1790 static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids,
1791 struct cfg80211_ssid *ssids,
1797 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1799 if (n_ssids == 1 && ssids[0].ssid_len != 0)
1800 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1803 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1805 if (iwl_mvm_rrm_scan_needed(mvm))
1806 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1811 int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1812 struct ieee80211_scan_request *req)
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, },
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 = {};
1826 u32 ssid_bitmap = 0;
1827 int ret, i, uid_idx;
1829 lockdep_assert_held(&mvm->mutex);
1831 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1832 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1835 /* we should have failed registration if scan_cmd was NULL */
1836 if (WARN_ON(mvm->scan_cmd == NULL))
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))
1847 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1850 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, ¶ms);
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);
1856 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1858 flags = iwl_mvm_scan_umac_common_flags(mvm, req->req.n_ssids,
1860 params.passive_fragmented);
1862 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1864 cmd->general_flags = cpu_to_le32(flags);
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;
1872 cmd->n_channels = req->req.n_channels;
1874 for (i = 0; i < req->req.n_ssids; i++)
1875 ssid_bitmap |= BIT(i);
1877 iwl_mvm_umac_scan_cfg_channels(mvm, req->req.channels,
1878 req->req.n_channels, ssid_bitmap, cmd);
1880 sec_part->schedule[0].iter_count = 1;
1881 sec_part->delay = 0;
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);
1888 iwl_mvm_scan_fill_ssids(sec_part->direct_scan, req->req.ssids,
1889 req->req.n_ssids, 0);
1891 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1894 "Scan request was sent successfully\n");
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.
1901 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
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)
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, },
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 = {};
1923 u32 ssid_bitmap = 0;
1926 lockdep_assert_held(&mvm->mutex);
1928 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1929 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1932 /* we should have failed registration if scan_cmd was NULL */
1933 if (WARN_ON(mvm->scan_cmd == NULL))
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))
1943 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags,
1946 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, ¶ms);
1948 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
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);
1954 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1956 flags = iwl_mvm_scan_umac_common_flags(mvm, req->n_ssids, req->ssids,
1957 params.passive_fragmented);
1959 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1961 if (iwl_mvm_scan_pass_all(mvm, req))
1962 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1964 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1966 cmd->general_flags = cpu_to_le32(flags);
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;
1974 cmd->n_channels = req->n_channels;
1976 iwl_scan_offload_build_ssid(req, sec_part->direct_scan, &ssid_bitmap,
1979 /* This API uses bits 0-19 instead of 1-20. */
1980 ssid_bitmap = ssid_bitmap >> 1;
1982 iwl_mvm_umac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1985 sec_part->schedule[0].interval =
1986 cpu_to_le16(req->interval / MSEC_PER_SEC);
1987 sec_part->schedule[0].iter_count = 0xff;
1989 sec_part->delay = 0;
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);
1996 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1999 "Sched scan request was sent successfully\n");
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.
2006 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
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)
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);
2022 * Scan uid may be set to zero in case of scan abort request from above.
2024 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
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");
2035 if (notif->ebs_status)
2036 mvm->last_ebs_successful = false;
2038 mvm->scan_uid[uid_idx] = 0;
2041 ieee80211_scan_completed(mvm->hw,
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);
2048 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
2054 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
2055 struct iwl_rx_packet *pkt, void *data)
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);
2062 if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
2065 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
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
2073 scan_done->mvm->scan_uid[uid_idx] = 0;
2075 if (notif->ebs_status)
2076 scan_done->mvm->last_ebs_successful = false;
2078 return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
2081 static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
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),
2089 lockdep_assert_held(&mvm->mutex);
2091 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
2093 return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
2096 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
2097 enum iwl_umac_scan_uid_type type, bool notify)
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 = {
2107 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
2109 ARRAY_SIZE(scan_done_notif),
2110 iwl_scan_umac_done_check, &scan_done);
2112 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
2114 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) {
2115 if (mvm->scan_uid[i] & type) {
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);
2125 err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
2132 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
2133 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
2137 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
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);
2153 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
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);
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);
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);