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iwlwifi: mvm: sync statistics firmware API
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
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20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
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39 * modification, are permitted provided that the following conditions
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46 * the documentation and/or other materials provided with the
47 * distribution.
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51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65
66 #include <linux/etherdevice.h>
67 #include <net/mac80211.h>
68
69 #include "mvm.h"
70 #include "iwl-eeprom-parse.h"
71 #include "fw-api-scan.h"
72
73 #define IWL_PLCP_QUIET_THRESH 1
74 #define IWL_ACTIVE_QUIET_TIME 10
75 #define IWL_DENSE_EBS_SCAN_RATIO 5
76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
77
78 struct iwl_mvm_scan_params {
79 u32 max_out_time;
80 u32 suspend_time;
81 bool passive_fragmented;
82 struct _dwell {
83 u16 passive;
84 u16 active;
85 } dwell[IEEE80211_NUM_BANDS];
86 };
87
88 enum iwl_umac_scan_uid_type {
89 IWL_UMAC_SCAN_UID_REG_SCAN = BIT(0),
90 IWL_UMAC_SCAN_UID_SCHED_SCAN = BIT(1),
91 IWL_UMAC_SCAN_UID_ALL = IWL_UMAC_SCAN_UID_REG_SCAN |
92 IWL_UMAC_SCAN_UID_SCHED_SCAN,
93 };
94
95 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
96 enum iwl_umac_scan_uid_type type, bool notify);
97
98 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
99 {
100 if (mvm->scan_rx_ant != ANT_NONE)
101 return mvm->scan_rx_ant;
102 return iwl_mvm_get_valid_rx_ant(mvm);
103 }
104
105 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
106 {
107 u16 rx_chain;
108 u8 rx_ant;
109
110 rx_ant = iwl_mvm_scan_rx_ant(mvm);
111 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
112 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
113 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
114 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
115 return cpu_to_le16(rx_chain);
116 }
117
118 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
119 {
120 if (band == IEEE80211_BAND_2GHZ)
121 return cpu_to_le32(PHY_BAND_24);
122 else
123 return cpu_to_le32(PHY_BAND_5);
124 }
125
126 static inline __le32
127 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
128 bool no_cck)
129 {
130 u32 tx_ant;
131
132 mvm->scan_last_antenna_idx =
133 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
134 mvm->scan_last_antenna_idx);
135 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
136
137 if (band == IEEE80211_BAND_2GHZ && !no_cck)
138 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
139 tx_ant);
140 else
141 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
142 }
143
144 /*
145 * We insert the SSIDs in an inverted order, because the FW will
146 * invert it back. The most prioritized SSID, which is first in the
147 * request list, is not copied here, but inserted directly to the probe
148 * request.
149 */
150 static void iwl_mvm_scan_fill_ssids(struct iwl_ssid_ie *cmd_ssid,
151 struct cfg80211_ssid *ssids,
152 int n_ssids, int first)
153 {
154 int fw_idx, req_idx;
155
156 for (req_idx = n_ssids - 1, fw_idx = 0; req_idx >= first;
157 req_idx--, fw_idx++) {
158 cmd_ssid[fw_idx].id = WLAN_EID_SSID;
159 cmd_ssid[fw_idx].len = ssids[req_idx].ssid_len;
160 memcpy(cmd_ssid[fw_idx].ssid,
161 ssids[req_idx].ssid,
162 ssids[req_idx].ssid_len);
163 }
164 }
165
166 /*
167 * If req->n_ssids > 0, it means we should do an active scan.
168 * In case of active scan w/o directed scan, we receive a zero-length SSID
169 * just to notify that this scan is active and not passive.
170 * In order to notify the FW of the number of SSIDs we wish to scan (including
171 * the zero-length one), we need to set the corresponding bits in chan->type,
172 * one for each SSID, and set the active bit (first). If the first SSID is
173 * already included in the probe template, so we need to set only
174 * req->n_ssids - 1 bits in addition to the first bit.
175 */
176 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
177 enum ieee80211_band band, int n_ssids)
178 {
179 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
180 return 10;
181 if (band == IEEE80211_BAND_2GHZ)
182 return 20 + 3 * (n_ssids + 1);
183 return 10 + 2 * (n_ssids + 1);
184 }
185
186 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
187 enum ieee80211_band band)
188 {
189 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
190 return 110;
191 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
192 }
193
194 static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd,
195 struct cfg80211_scan_request *req,
196 bool basic_ssid,
197 struct iwl_mvm_scan_params *params)
198 {
199 struct iwl_scan_channel *chan = (struct iwl_scan_channel *)
200 (cmd->data + le16_to_cpu(cmd->tx_cmd.len));
201 int i;
202 int type = BIT(req->n_ssids) - 1;
203 enum ieee80211_band band = req->channels[0]->band;
204
205 if (!basic_ssid)
206 type |= BIT(req->n_ssids);
207
208 for (i = 0; i < cmd->channel_count; i++) {
209 chan->channel = cpu_to_le16(req->channels[i]->hw_value);
210 chan->type = cpu_to_le32(type);
211 if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR)
212 chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE);
213 chan->active_dwell = cpu_to_le16(params->dwell[band].active);
214 chan->passive_dwell = cpu_to_le16(params->dwell[band].passive);
215 chan->iteration_count = cpu_to_le16(1);
216 chan++;
217 }
218 }
219
220 /*
221 * Fill in probe request with the following parameters:
222 * TA is our vif HW address, which mac80211 ensures we have.
223 * Packet is broadcasted, so this is both SA and DA.
224 * The probe request IE is made out of two: first comes the most prioritized
225 * SSID if a directed scan is requested. Second comes whatever extra
226 * information was given to us as the scan request IE.
227 */
228 static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
229 int n_ssids, const u8 *ssid, int ssid_len,
230 const u8 *band_ie, int band_ie_len,
231 const u8 *common_ie, int common_ie_len,
232 int left)
233 {
234 int len = 0;
235 u8 *pos = NULL;
236
237 /* Make sure there is enough space for the probe request,
238 * two mandatory IEs and the data */
239 left -= 24;
240 if (left < 0)
241 return 0;
242
243 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
244 eth_broadcast_addr(frame->da);
245 memcpy(frame->sa, ta, ETH_ALEN);
246 eth_broadcast_addr(frame->bssid);
247 frame->seq_ctrl = 0;
248
249 len += 24;
250
251 /* for passive scans, no need to fill anything */
252 if (n_ssids == 0)
253 return (u16)len;
254
255 /* points to the payload of the request */
256 pos = &frame->u.probe_req.variable[0];
257
258 /* fill in our SSID IE */
259 left -= ssid_len + 2;
260 if (left < 0)
261 return 0;
262 *pos++ = WLAN_EID_SSID;
263 *pos++ = ssid_len;
264 if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */
265 memcpy(pos, ssid, ssid_len);
266 pos += ssid_len;
267 }
268
269 len += ssid_len + 2;
270
271 if (WARN_ON(left < band_ie_len + common_ie_len))
272 return len;
273
274 if (band_ie && band_ie_len) {
275 memcpy(pos, band_ie, band_ie_len);
276 pos += band_ie_len;
277 len += band_ie_len;
278 }
279
280 if (common_ie && common_ie_len) {
281 memcpy(pos, common_ie, common_ie_len);
282 pos += common_ie_len;
283 len += common_ie_len;
284 }
285
286 return (u16)len;
287 }
288
289 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
290 struct ieee80211_vif *vif)
291 {
292 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
293 int *global_cnt = data;
294
295 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
296 mvmvif->phy_ctxt->id < MAX_PHYS)
297 *global_cnt += 1;
298 }
299
300 static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
301 struct ieee80211_vif *vif,
302 int n_ssids, u32 flags,
303 struct iwl_mvm_scan_params *params)
304 {
305 int global_cnt = 0;
306 enum ieee80211_band band;
307 u8 frag_passive_dwell = 0;
308
309 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
310 IEEE80211_IFACE_ITER_NORMAL,
311 iwl_mvm_scan_condition_iterator,
312 &global_cnt);
313
314 if (!global_cnt)
315 goto not_bound;
316
317 params->suspend_time = 30;
318 params->max_out_time = 120;
319
320 if (iwl_mvm_low_latency(mvm)) {
321 if (mvm->fw->ucode_capa.api[0] &
322 IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
323 params->suspend_time = 105;
324 /*
325 * If there is more than one active interface make
326 * passive scan more fragmented.
327 */
328 frag_passive_dwell = (global_cnt < 2) ? 40 : 20;
329 params->max_out_time = frag_passive_dwell;
330 } else {
331 params->suspend_time = 120;
332 params->max_out_time = 120;
333 }
334 }
335
336 if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
337 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
338 /*
339 * P2P device scan should not be fragmented to avoid negative
340 * impact on P2P device discovery. Configure max_out_time to be
341 * equal to dwell time on passive channel. Take a longest
342 * possible value, one that corresponds to 2GHz band
343 */
344 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
345 u32 passive_dwell =
346 iwl_mvm_get_passive_dwell(mvm,
347 IEEE80211_BAND_2GHZ);
348 params->max_out_time = passive_dwell;
349 } else {
350 params->passive_fragmented = true;
351 }
352 }
353
354 if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
355 params->max_out_time = 200;
356
357 not_bound:
358
359 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
360 if (params->passive_fragmented)
361 params->dwell[band].passive = frag_passive_dwell;
362 else
363 params->dwell[band].passive =
364 iwl_mvm_get_passive_dwell(mvm, band);
365 params->dwell[band].active = iwl_mvm_get_active_dwell(mvm, band,
366 n_ssids);
367 }
368 }
369
370 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
371 {
372 /* require rrm scan whenever the fw supports it */
373 return mvm->fw->ucode_capa.capa[0] &
374 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
375 }
376
377 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm,
378 bool is_sched_scan)
379 {
380 int max_probe_len;
381
382 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
383 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
384 else
385 max_probe_len = mvm->fw->ucode_capa.max_probe_length;
386
387 /* we create the 802.11 header and SSID element */
388 max_probe_len -= 24 + 2;
389
390 /* basic ssid is added only for hw_scan with and old api */
391 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) &&
392 !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) &&
393 !is_sched_scan)
394 max_probe_len -= 32;
395
396 /* DS parameter set element is added on 2.4GHZ band if required */
397 if (iwl_mvm_rrm_scan_needed(mvm))
398 max_probe_len -= 3;
399
400 return max_probe_len;
401 }
402
403 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan)
404 {
405 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan);
406
407 if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN))
408 return max_ie_len;
409
410 /* TODO: [BUG] This function should return the maximum allowed size of
411 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
412 * in the same command. So the correct implementation of this function
413 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
414 * command has only 512 bytes and it would leave us with about 240
415 * bytes for scan IEs, which is clearly not enough. So meanwhile
416 * we will report an incorrect value. This may result in a failure to
417 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
418 * functions with -ENOBUFS, if a large enough probe will be provided.
419 */
420 return max_ie_len;
421 }
422
423 int iwl_mvm_scan_request(struct iwl_mvm *mvm,
424 struct ieee80211_vif *vif,
425 struct cfg80211_scan_request *req)
426 {
427 struct iwl_host_cmd hcmd = {
428 .id = SCAN_REQUEST_CMD,
429 .len = { 0, },
430 .data = { mvm->scan_cmd, },
431 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
432 };
433 struct iwl_scan_cmd *cmd = mvm->scan_cmd;
434 int ret;
435 u32 status;
436 int ssid_len = 0;
437 u8 *ssid = NULL;
438 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
439 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
440 struct iwl_mvm_scan_params params = {};
441
442 lockdep_assert_held(&mvm->mutex);
443
444 /* we should have failed registration if scan_cmd was NULL */
445 if (WARN_ON(mvm->scan_cmd == NULL))
446 return -ENOMEM;
447
448 IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
449 mvm->scan_status = IWL_MVM_SCAN_OS;
450 memset(cmd, 0, ksize(cmd));
451
452 cmd->channel_count = (u8)req->n_channels;
453 cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
454 cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
455 cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
456
457 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, &params);
458 cmd->max_out_time = cpu_to_le32(params.max_out_time);
459 cmd->suspend_time = cpu_to_le32(params.suspend_time);
460 if (params.passive_fragmented)
461 cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
462
463 cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
464 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
465 MAC_FILTER_IN_BEACON);
466
467 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
468 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
469 else
470 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
471
472 cmd->repeats = cpu_to_le32(1);
473
474 /*
475 * If the user asked for passive scan, don't change to active scan if
476 * you see any activity on the channel - remain passive.
477 */
478 if (req->n_ssids > 0) {
479 cmd->passive2active = cpu_to_le16(1);
480 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
481 if (basic_ssid) {
482 ssid = req->ssids[0].ssid;
483 ssid_len = req->ssids[0].ssid_len;
484 }
485 } else {
486 cmd->passive2active = 0;
487 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
488 }
489
490 iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids,
491 basic_ssid ? 1 : 0);
492
493 cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
494 3 << TX_CMD_FLG_BT_PRIO_POS);
495
496 cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
497 cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
498 cmd->tx_cmd.rate_n_flags =
499 iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
500 req->no_cck);
501
502 cmd->tx_cmd.len =
503 cpu_to_le16(iwl_mvm_fill_probe_req(
504 (struct ieee80211_mgmt *)cmd->data,
505 vif->addr,
506 req->n_ssids, ssid, ssid_len,
507 req->ie, req->ie_len, NULL, 0,
508 mvm->fw->ucode_capa.max_probe_length));
509
510 iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, &params);
511
512 cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
513 le16_to_cpu(cmd->tx_cmd.len) +
514 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
515 hcmd.len[0] = le16_to_cpu(cmd->len);
516
517 status = SCAN_RESPONSE_OK;
518 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
519 if (!ret && status == SCAN_RESPONSE_OK) {
520 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
521 } else {
522 /*
523 * If the scan failed, it usually means that the FW was unable
524 * to allocate the time events. Warn on it, but maybe we
525 * should try to send the command again with different params.
526 */
527 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
528 status, ret);
529 mvm->scan_status = IWL_MVM_SCAN_NONE;
530 ret = -EIO;
531 }
532 return ret;
533 }
534
535 int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
536 struct iwl_device_cmd *cmd)
537 {
538 struct iwl_rx_packet *pkt = rxb_addr(rxb);
539 struct iwl_cmd_response *resp = (void *)pkt->data;
540
541 IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
542 le32_to_cpu(resp->status));
543 return 0;
544 }
545
546 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm,
547 struct iwl_rx_cmd_buffer *rxb,
548 struct iwl_device_cmd *cmd)
549 {
550 struct iwl_rx_packet *pkt = rxb_addr(rxb);
551 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
552
553 IWL_DEBUG_SCAN(mvm,
554 "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
555 notif->status, notif->scanned_channels);
556 return 0;
557 }
558
559 int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
560 struct iwl_device_cmd *cmd)
561 {
562 struct iwl_rx_packet *pkt = rxb_addr(rxb);
563 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
564
565 lockdep_assert_held(&mvm->mutex);
566
567 IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
568 notif->status, notif->scanned_channels);
569
570 if (mvm->scan_status == IWL_MVM_SCAN_OS)
571 mvm->scan_status = IWL_MVM_SCAN_NONE;
572 ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
573
574 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
575
576 return 0;
577 }
578
579 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
580 struct iwl_rx_cmd_buffer *rxb,
581 struct iwl_device_cmd *cmd)
582 {
583 struct iwl_rx_packet *pkt = rxb_addr(rxb);
584
585 if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
586 !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
587 struct iwl_sched_scan_results *notif = (void *)pkt->data;
588
589 if (!(notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN))
590 return 0;
591 }
592
593 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
594 ieee80211_sched_scan_results(mvm->hw);
595
596 return 0;
597 }
598
599 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
600 struct iwl_rx_packet *pkt, void *data)
601 {
602 struct iwl_mvm *mvm =
603 container_of(notif_wait, struct iwl_mvm, notif_wait);
604 struct iwl_scan_complete_notif *notif;
605 u32 *resp;
606
607 switch (pkt->hdr.cmd) {
608 case SCAN_ABORT_CMD:
609 resp = (void *)pkt->data;
610 if (*resp == CAN_ABORT_STATUS) {
611 IWL_DEBUG_SCAN(mvm,
612 "Scan can be aborted, wait until completion\n");
613 return false;
614 }
615
616 /*
617 * If scan cannot be aborted, it means that we had a
618 * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
619 * ieee80211_scan_completed already.
620 */
621 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
622 *resp);
623 return true;
624
625 case SCAN_COMPLETE_NOTIFICATION:
626 notif = (void *)pkt->data;
627 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
628 notif->status);
629 return true;
630
631 default:
632 WARN_ON(1);
633 return false;
634 };
635 }
636
637 static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm)
638 {
639 struct iwl_notification_wait wait_scan_abort;
640 static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
641 SCAN_COMPLETE_NOTIFICATION };
642 int ret;
643
644 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
645 scan_abort_notif,
646 ARRAY_SIZE(scan_abort_notif),
647 iwl_mvm_scan_abort_notif, NULL);
648
649 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
650 if (ret) {
651 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
652 /* mac80211's state will be cleaned in the nic_restart flow */
653 goto out_remove_notif;
654 }
655
656 return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
657
658 out_remove_notif:
659 iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
660 return ret;
661 }
662
663 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
664 struct iwl_rx_cmd_buffer *rxb,
665 struct iwl_device_cmd *cmd)
666 {
667 struct iwl_rx_packet *pkt = rxb_addr(rxb);
668 u8 status, ebs_status;
669
670 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
671 struct iwl_periodic_scan_complete *scan_notif;
672
673 scan_notif = (void *)pkt->data;
674 status = scan_notif->status;
675 ebs_status = scan_notif->ebs_status;
676 } else {
677 struct iwl_scan_offload_complete *scan_notif;
678
679 scan_notif = (void *)pkt->data;
680 status = scan_notif->status;
681 ebs_status = scan_notif->ebs_status;
682 }
683 /* scan status must be locked for proper checking */
684 lockdep_assert_held(&mvm->mutex);
685
686 IWL_DEBUG_SCAN(mvm,
687 "%s completed, status %s, EBS status %s\n",
688 mvm->scan_status == IWL_MVM_SCAN_SCHED ?
689 "Scheduled scan" : "Scan",
690 status == IWL_SCAN_OFFLOAD_COMPLETED ?
691 "completed" : "aborted",
692 ebs_status == IWL_SCAN_EBS_SUCCESS ?
693 "success" : "failed");
694
695
696 /* only call mac80211 completion if the stop was initiated by FW */
697 if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
698 mvm->scan_status = IWL_MVM_SCAN_NONE;
699 ieee80211_sched_scan_stopped(mvm->hw);
700 } else if (mvm->scan_status == IWL_MVM_SCAN_OS) {
701 mvm->scan_status = IWL_MVM_SCAN_NONE;
702 ieee80211_scan_completed(mvm->hw,
703 status == IWL_SCAN_OFFLOAD_ABORTED);
704 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
705 }
706
707 mvm->last_ebs_successful = !ebs_status;
708
709 return 0;
710 }
711
712 static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
713 struct ieee80211_vif *vif,
714 struct ieee80211_scan_ies *ies,
715 enum ieee80211_band band,
716 struct iwl_tx_cmd *cmd,
717 u8 *data)
718 {
719 u16 cmd_len;
720
721 cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
722 cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
723 cmd->sta_id = mvm->aux_sta.sta_id;
724
725 cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
726
727 cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
728 vif->addr,
729 1, NULL, 0,
730 ies->ies[band], ies->len[band],
731 ies->common_ies, ies->common_ie_len,
732 SCAN_OFFLOAD_PROBE_REQ_SIZE);
733 cmd->len = cpu_to_le16(cmd_len);
734 }
735
736 static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
737 struct ieee80211_vif *vif,
738 struct cfg80211_sched_scan_request *req,
739 struct iwl_scan_offload_cmd *scan,
740 struct iwl_mvm_scan_params *params)
741 {
742 scan->channel_count = req->n_channels;
743 scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
744 scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
745 scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
746 scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
747
748 scan->max_out_time = cpu_to_le32(params->max_out_time);
749 scan->suspend_time = cpu_to_le32(params->suspend_time);
750
751 scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
752 MAC_FILTER_IN_BEACON);
753 scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
754 scan->rep_count = cpu_to_le32(1);
755
756 if (params->passive_fragmented)
757 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
758 }
759
760 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
761 {
762 int i;
763
764 for (i = 0; i < PROBE_OPTION_MAX; i++) {
765 if (!ssid_list[i].len)
766 break;
767 if (ssid_list[i].len == ssid_len &&
768 !memcmp(ssid_list->ssid, ssid, ssid_len))
769 return i;
770 }
771 return -1;
772 }
773
774 static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
775 struct iwl_ssid_ie *direct_scan,
776 u32 *ssid_bitmap, bool basic_ssid)
777 {
778 int i, j;
779 int index;
780
781 /*
782 * copy SSIDs from match list.
783 * iwl_config_sched_scan_profiles() uses the order of these ssids to
784 * config match list.
785 */
786 for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
787 /* skip empty SSID matchsets */
788 if (!req->match_sets[i].ssid.ssid_len)
789 continue;
790 direct_scan[i].id = WLAN_EID_SSID;
791 direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
792 memcpy(direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
793 direct_scan[i].len);
794 }
795
796 /* add SSIDs from scan SSID list */
797 *ssid_bitmap = 0;
798 for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
799 index = iwl_ssid_exist(req->ssids[j].ssid,
800 req->ssids[j].ssid_len,
801 direct_scan);
802 if (index < 0) {
803 if (!req->ssids[j].ssid_len && basic_ssid)
804 continue;
805 direct_scan[i].id = WLAN_EID_SSID;
806 direct_scan[i].len = req->ssids[j].ssid_len;
807 memcpy(direct_scan[i].ssid, req->ssids[j].ssid,
808 direct_scan[i].len);
809 *ssid_bitmap |= BIT(i + 1);
810 i++;
811 } else {
812 *ssid_bitmap |= BIT(index + 1);
813 }
814 }
815 }
816
817 static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
818 struct cfg80211_sched_scan_request *req,
819 u8 *channels_buffer,
820 enum ieee80211_band band,
821 int *head,
822 u32 ssid_bitmap,
823 struct iwl_mvm_scan_params *params)
824 {
825 u32 n_channels = mvm->fw->ucode_capa.n_scan_channels;
826 __le32 *type = (__le32 *)channels_buffer;
827 __le16 *channel_number = (__le16 *)(type + n_channels);
828 __le16 *iter_count = channel_number + n_channels;
829 __le32 *iter_interval = (__le32 *)(iter_count + n_channels);
830 u8 *active_dwell = (u8 *)(iter_interval + n_channels);
831 u8 *passive_dwell = active_dwell + n_channels;
832 int i, index = 0;
833
834 for (i = 0; i < req->n_channels; i++) {
835 struct ieee80211_channel *chan = req->channels[i];
836
837 if (chan->band != band)
838 continue;
839
840 index = *head;
841 (*head)++;
842
843 channel_number[index] = cpu_to_le16(chan->hw_value);
844 active_dwell[index] = params->dwell[band].active;
845 passive_dwell[index] = params->dwell[band].passive;
846
847 iter_count[index] = cpu_to_le16(1);
848 iter_interval[index] = 0;
849
850 if (!(chan->flags & IEEE80211_CHAN_NO_IR))
851 type[index] |=
852 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
853
854 type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL |
855 IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
856
857 if (chan->flags & IEEE80211_CHAN_NO_HT40)
858 type[index] |=
859 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
860
861 /* scan for all SSIDs from req->ssids */
862 type[index] |= cpu_to_le32(ssid_bitmap);
863 }
864 }
865
866 int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
867 struct ieee80211_vif *vif,
868 struct cfg80211_sched_scan_request *req,
869 struct ieee80211_scan_ies *ies)
870 {
871 int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
872 int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
873 int head = 0;
874 u32 ssid_bitmap;
875 int cmd_len;
876 int ret;
877 u8 *probes;
878 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
879 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
880
881 struct iwl_scan_offload_cfg *scan_cfg;
882 struct iwl_host_cmd cmd = {
883 .id = SCAN_OFFLOAD_CONFIG_CMD,
884 };
885 struct iwl_mvm_scan_params params = {};
886
887 lockdep_assert_held(&mvm->mutex);
888
889 cmd_len = sizeof(struct iwl_scan_offload_cfg) +
890 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE +
891 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
892
893 scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
894 if (!scan_cfg)
895 return -ENOMEM;
896
897 probes = scan_cfg->data +
898 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE;
899
900 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
901 iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, &params);
902 scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
903
904 iwl_scan_offload_build_ssid(req, scan_cfg->scan_cmd.direct_scan,
905 &ssid_bitmap, basic_ssid);
906 /* build tx frames for supported bands */
907 if (band_2ghz) {
908 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
909 IEEE80211_BAND_2GHZ,
910 &scan_cfg->scan_cmd.tx_cmd[0],
911 probes);
912 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
913 IEEE80211_BAND_2GHZ, &head,
914 ssid_bitmap, &params);
915 }
916 if (band_5ghz) {
917 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
918 IEEE80211_BAND_5GHZ,
919 &scan_cfg->scan_cmd.tx_cmd[1],
920 probes +
921 SCAN_OFFLOAD_PROBE_REQ_SIZE);
922 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
923 IEEE80211_BAND_5GHZ, &head,
924 ssid_bitmap, &params);
925 }
926
927 cmd.data[0] = scan_cfg;
928 cmd.len[0] = cmd_len;
929 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
930
931 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
932
933 ret = iwl_mvm_send_cmd(mvm, &cmd);
934 kfree(scan_cfg);
935 return ret;
936 }
937
938 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
939 struct cfg80211_sched_scan_request *req)
940 {
941 struct iwl_scan_offload_profile *profile;
942 struct iwl_scan_offload_profile_cfg *profile_cfg;
943 struct iwl_scan_offload_blacklist *blacklist;
944 struct iwl_host_cmd cmd = {
945 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
946 .len[1] = sizeof(*profile_cfg),
947 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
948 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
949 };
950 int blacklist_len;
951 int i;
952 int ret;
953
954 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
955 return -EIO;
956
957 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
958 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
959 else
960 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
961
962 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
963 if (!blacklist)
964 return -ENOMEM;
965
966 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
967 if (!profile_cfg) {
968 ret = -ENOMEM;
969 goto free_blacklist;
970 }
971
972 cmd.data[0] = blacklist;
973 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
974 cmd.data[1] = profile_cfg;
975
976 /* No blacklist configuration */
977
978 profile_cfg->num_profiles = req->n_match_sets;
979 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
980 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
981 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
982 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
983 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
984
985 for (i = 0; i < req->n_match_sets; i++) {
986 profile = &profile_cfg->profiles[i];
987 profile->ssid_index = i;
988 /* Support any cipher and auth algorithm */
989 profile->unicast_cipher = 0xff;
990 profile->auth_alg = 0xff;
991 profile->network_type = IWL_NETWORK_TYPE_ANY;
992 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
993 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
994 }
995
996 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
997
998 ret = iwl_mvm_send_cmd(mvm, &cmd);
999 kfree(profile_cfg);
1000 free_blacklist:
1001 kfree(blacklist);
1002
1003 return ret;
1004 }
1005
1006 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
1007 struct cfg80211_sched_scan_request *req)
1008 {
1009 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
1010 IWL_DEBUG_SCAN(mvm,
1011 "Sending scheduled scan with filtering, n_match_sets %d\n",
1012 req->n_match_sets);
1013 return false;
1014 }
1015
1016 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
1017 return true;
1018 }
1019
1020 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1021 struct cfg80211_sched_scan_request *req)
1022 {
1023 struct iwl_scan_offload_req scan_req = {
1024 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
1025
1026 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
1027 .schedule_line[0].delay = cpu_to_le16(req->interval / 1000),
1028 .schedule_line[0].full_scan_mul = 1,
1029
1030 .schedule_line[1].iterations = 0xff,
1031 .schedule_line[1].delay = cpu_to_le16(req->interval / 1000),
1032 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
1033 };
1034
1035 if (iwl_mvm_scan_pass_all(mvm, req))
1036 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
1037
1038 if (mvm->last_ebs_successful &&
1039 mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
1040 scan_req.flags |=
1041 cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
1042
1043 return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
1044 sizeof(scan_req), &scan_req);
1045 }
1046
1047 int iwl_mvm_scan_offload_start(struct iwl_mvm *mvm,
1048 struct ieee80211_vif *vif,
1049 struct cfg80211_sched_scan_request *req,
1050 struct ieee80211_scan_ies *ies)
1051 {
1052 int ret;
1053
1054 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1055 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1056 if (ret)
1057 return ret;
1058 ret = iwl_mvm_sched_scan_umac(mvm, vif, req, ies);
1059 } else if ((mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
1060 mvm->scan_status = IWL_MVM_SCAN_SCHED;
1061 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1062 if (ret)
1063 return ret;
1064 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
1065 } else {
1066 mvm->scan_status = IWL_MVM_SCAN_SCHED;
1067 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1068 if (ret)
1069 return ret;
1070 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1071 if (ret)
1072 return ret;
1073 ret = iwl_mvm_sched_scan_start(mvm, req);
1074 }
1075
1076 return ret;
1077 }
1078
1079 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
1080 {
1081 int ret;
1082 struct iwl_host_cmd cmd = {
1083 .id = SCAN_OFFLOAD_ABORT_CMD,
1084 };
1085 u32 status;
1086
1087 /* Exit instantly with error when device is not ready
1088 * to receive scan abort command or it does not perform
1089 * scheduled scan currently */
1090 if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1091 (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1092 mvm->scan_status != IWL_MVM_SCAN_OS))
1093 return -EIO;
1094
1095 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
1096 if (ret)
1097 return ret;
1098
1099 if (status != CAN_ABORT_STATUS) {
1100 /*
1101 * The scan abort will return 1 for success or
1102 * 2 for "failure". A failure condition can be
1103 * due to simply not being in an active scan which
1104 * can occur if we send the scan abort before the
1105 * microcode has notified us that a scan is completed.
1106 */
1107 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
1108 ret = -ENOENT;
1109 }
1110
1111 return ret;
1112 }
1113
1114 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
1115 {
1116 int ret;
1117 struct iwl_notification_wait wait_scan_done;
1118 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
1119 bool sched = mvm->scan_status == IWL_MVM_SCAN_SCHED;
1120
1121 lockdep_assert_held(&mvm->mutex);
1122
1123 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1124 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
1125 notify);
1126
1127 if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1128 (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1129 mvm->scan_status != IWL_MVM_SCAN_OS)) {
1130 IWL_DEBUG_SCAN(mvm, "No scan to stop\n");
1131 return 0;
1132 }
1133
1134 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1135 scan_done_notif,
1136 ARRAY_SIZE(scan_done_notif),
1137 NULL, NULL);
1138
1139 ret = iwl_mvm_send_scan_offload_abort(mvm);
1140 if (ret) {
1141 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
1142 sched ? "offloaded " : "", ret);
1143 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1144 return ret;
1145 }
1146
1147 IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
1148 sched ? "offloaded " : "");
1149
1150 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1151 if (ret)
1152 return ret;
1153
1154 /*
1155 * Clear the scan status so the next scan requests will succeed. This
1156 * also ensures the Rx handler doesn't do anything, as the scan was
1157 * stopped from above. Since the rx handler won't do anything now,
1158 * we have to release the scan reference here.
1159 */
1160 if (mvm->scan_status == IWL_MVM_SCAN_OS)
1161 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1162
1163 mvm->scan_status = IWL_MVM_SCAN_NONE;
1164
1165 if (notify) {
1166 if (sched)
1167 ieee80211_sched_scan_stopped(mvm->hw);
1168 else
1169 ieee80211_scan_completed(mvm->hw, true);
1170 }
1171
1172 return 0;
1173 }
1174
1175 static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm *mvm,
1176 struct iwl_scan_req_tx_cmd *tx_cmd,
1177 bool no_cck)
1178 {
1179 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1180 TX_CMD_FLG_BT_DIS);
1181 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1182 IEEE80211_BAND_2GHZ,
1183 no_cck);
1184 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
1185
1186 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1187 TX_CMD_FLG_BT_DIS);
1188 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1189 IEEE80211_BAND_5GHZ,
1190 no_cck);
1191 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
1192 }
1193
1194 static void
1195 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
1196 struct ieee80211_channel **channels,
1197 int n_channels, u32 ssid_bitmap,
1198 struct iwl_scan_req_unified_lmac *cmd)
1199 {
1200 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
1201 int i;
1202
1203 for (i = 0; i < n_channels; i++) {
1204 channel_cfg[i].channel_num =
1205 cpu_to_le16(channels[i]->hw_value);
1206 channel_cfg[i].iter_count = cpu_to_le16(1);
1207 channel_cfg[i].iter_interval = 0;
1208 channel_cfg[i].flags =
1209 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
1210 ssid_bitmap);
1211 }
1212 }
1213
1214 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
1215 size_t len, u8 *const pos)
1216 {
1217 static const u8 before_ds_params[] = {
1218 WLAN_EID_SSID,
1219 WLAN_EID_SUPP_RATES,
1220 WLAN_EID_REQUEST,
1221 WLAN_EID_EXT_SUPP_RATES,
1222 };
1223 size_t offs;
1224 u8 *newpos = pos;
1225
1226 if (!iwl_mvm_rrm_scan_needed(mvm)) {
1227 memcpy(newpos, ies, len);
1228 return newpos + len;
1229 }
1230
1231 offs = ieee80211_ie_split(ies, len,
1232 before_ds_params,
1233 ARRAY_SIZE(before_ds_params),
1234 0);
1235
1236 memcpy(newpos, ies, offs);
1237 newpos += offs;
1238
1239 /* Add a placeholder for DS Parameter Set element */
1240 *newpos++ = WLAN_EID_DS_PARAMS;
1241 *newpos++ = 1;
1242 *newpos++ = 0;
1243
1244 memcpy(newpos, ies + offs, len - offs);
1245 newpos += len - offs;
1246
1247 return newpos;
1248 }
1249
1250 static void
1251 iwl_mvm_build_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1252 struct ieee80211_scan_ies *ies,
1253 struct iwl_scan_probe_req *preq,
1254 const u8 *mac_addr, const u8 *mac_addr_mask)
1255 {
1256 struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
1257 u8 *pos, *newpos;
1258
1259 /*
1260 * Unfortunately, right now the offload scan doesn't support randomising
1261 * within the firmware, so until the firmware API is ready we implement
1262 * it in the driver. This means that the scan iterations won't really be
1263 * random, only when it's restarted, but at least that helps a bit.
1264 */
1265 if (mac_addr)
1266 get_random_mask_addr(frame->sa, mac_addr, mac_addr_mask);
1267 else
1268 memcpy(frame->sa, vif->addr, ETH_ALEN);
1269
1270 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1271 eth_broadcast_addr(frame->da);
1272 eth_broadcast_addr(frame->bssid);
1273 frame->seq_ctrl = 0;
1274
1275 pos = frame->u.probe_req.variable;
1276 *pos++ = WLAN_EID_SSID;
1277 *pos++ = 0;
1278
1279 preq->mac_header.offset = 0;
1280 preq->mac_header.len = cpu_to_le16(24 + 2);
1281
1282 /* Insert ds parameter set element on 2.4 GHz band */
1283 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
1284 ies->ies[IEEE80211_BAND_2GHZ],
1285 ies->len[IEEE80211_BAND_2GHZ],
1286 pos);
1287 preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
1288 preq->band_data[0].len = cpu_to_le16(newpos - pos);
1289 pos = newpos;
1290
1291 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
1292 ies->len[IEEE80211_BAND_5GHZ]);
1293 preq->band_data[1].offset = cpu_to_le16(pos - preq->buf);
1294 preq->band_data[1].len = cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
1295 pos += ies->len[IEEE80211_BAND_5GHZ];
1296
1297 memcpy(pos, ies->common_ies, ies->common_ie_len);
1298 preq->common_data.offset = cpu_to_le16(pos - preq->buf);
1299 preq->common_data.len = cpu_to_le16(ies->common_ie_len);
1300 }
1301
1302 static void
1303 iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
1304 struct iwl_scan_req_unified_lmac *cmd,
1305 struct iwl_mvm_scan_params *params)
1306 {
1307 memset(cmd, 0, ksize(cmd));
1308 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1309 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1310 if (params->passive_fragmented)
1311 cmd->fragmented_dwell =
1312 params->dwell[IEEE80211_BAND_2GHZ].passive;
1313 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
1314 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1315 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1316 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1317 cmd->iter_num = cpu_to_le32(1);
1318
1319 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1320 mvm->last_ebs_successful) {
1321 cmd->channel_opt[0].flags =
1322 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1323 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1324 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1325 cmd->channel_opt[0].non_ebs_ratio =
1326 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
1327 cmd->channel_opt[1].flags =
1328 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1329 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1330 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1331 cmd->channel_opt[1].non_ebs_ratio =
1332 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1333 }
1334
1335 if (iwl_mvm_rrm_scan_needed(mvm))
1336 cmd->scan_flags |=
1337 cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
1338 }
1339
1340 int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
1341 struct ieee80211_vif *vif,
1342 struct ieee80211_scan_request *req)
1343 {
1344 struct iwl_host_cmd hcmd = {
1345 .id = SCAN_OFFLOAD_REQUEST_CMD,
1346 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1347 sizeof(struct iwl_scan_channel_cfg_lmac) *
1348 mvm->fw->ucode_capa.n_scan_channels +
1349 sizeof(struct iwl_scan_probe_req), },
1350 .data = { mvm->scan_cmd, },
1351 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1352 };
1353 struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1354 struct iwl_scan_probe_req *preq;
1355 struct iwl_mvm_scan_params params = {};
1356 u32 flags;
1357 u32 ssid_bitmap = 0;
1358 int ret, i;
1359
1360 lockdep_assert_held(&mvm->mutex);
1361
1362 /* we should have failed registration if scan_cmd was NULL */
1363 if (WARN_ON(mvm->scan_cmd == NULL))
1364 return -ENOMEM;
1365
1366 if (req->req.n_ssids > PROBE_OPTION_MAX ||
1367 req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] +
1368 req->ies.len[NL80211_BAND_5GHZ] >
1369 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) ||
1370 req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
1371 return -ENOBUFS;
1372
1373 mvm->scan_status = IWL_MVM_SCAN_OS;
1374
1375 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1376 &params);
1377
1378 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1379
1380 cmd->n_channels = (u8)req->req.n_channels;
1381
1382 flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1383
1384 if (req->req.n_ssids == 1 && req->req.ssids[0].ssid_len != 0)
1385 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1386
1387 if (params.passive_fragmented)
1388 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1389
1390 if (req->req.n_ssids == 0)
1391 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1392
1393 cmd->scan_flags |= cpu_to_le32(flags);
1394
1395 cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band);
1396 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1397 MAC_FILTER_IN_BEACON);
1398 iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, req->req.no_cck);
1399 iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->req.ssids,
1400 req->req.n_ssids, 0);
1401
1402 cmd->schedule[0].delay = 0;
1403 cmd->schedule[0].iterations = 1;
1404 cmd->schedule[0].full_scan_mul = 0;
1405 cmd->schedule[1].delay = 0;
1406 cmd->schedule[1].iterations = 0;
1407 cmd->schedule[1].full_scan_mul = 0;
1408
1409 for (i = 1; i <= req->req.n_ssids; i++)
1410 ssid_bitmap |= BIT(i);
1411
1412 iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels,
1413 req->req.n_channels, ssid_bitmap,
1414 cmd);
1415
1416 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1417 mvm->fw->ucode_capa.n_scan_channels);
1418
1419 iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, preq,
1420 req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1421 req->req.mac_addr : NULL,
1422 req->req.mac_addr_mask);
1423
1424 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1425 if (!ret) {
1426 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1427 } else {
1428 /*
1429 * If the scan failed, it usually means that the FW was unable
1430 * to allocate the time events. Warn on it, but maybe we
1431 * should try to send the command again with different params.
1432 */
1433 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1434 mvm->scan_status = IWL_MVM_SCAN_NONE;
1435 ret = -EIO;
1436 }
1437 return ret;
1438 }
1439
1440 int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
1441 struct ieee80211_vif *vif,
1442 struct cfg80211_sched_scan_request *req,
1443 struct ieee80211_scan_ies *ies)
1444 {
1445 struct iwl_host_cmd hcmd = {
1446 .id = SCAN_OFFLOAD_REQUEST_CMD,
1447 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1448 sizeof(struct iwl_scan_channel_cfg_lmac) *
1449 mvm->fw->ucode_capa.n_scan_channels +
1450 sizeof(struct iwl_scan_probe_req), },
1451 .data = { mvm->scan_cmd, },
1452 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1453 };
1454 struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1455 struct iwl_scan_probe_req *preq;
1456 struct iwl_mvm_scan_params params = {};
1457 int ret;
1458 u32 flags = 0, ssid_bitmap = 0;
1459
1460 lockdep_assert_held(&mvm->mutex);
1461
1462 /* we should have failed registration if scan_cmd was NULL */
1463 if (WARN_ON(mvm->scan_cmd == NULL))
1464 return -ENOMEM;
1465
1466 if (req->n_ssids > PROBE_OPTION_MAX ||
1467 ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1468 ies->len[NL80211_BAND_5GHZ] >
1469 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) ||
1470 req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1471 return -ENOBUFS;
1472
1473 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
1474
1475 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1476
1477 cmd->n_channels = (u8)req->n_channels;
1478
1479 if (iwl_mvm_scan_pass_all(mvm, req))
1480 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1481
1482 if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0)
1483 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1484
1485 if (params.passive_fragmented)
1486 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1487
1488 if (req->n_ssids == 0)
1489 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1490
1491 #ifdef CONFIG_IWLWIFI_DEBUGFS
1492 if (mvm->scan_iter_notif_enabled)
1493 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
1494 #endif
1495
1496 cmd->scan_flags |= cpu_to_le32(flags);
1497
1498 cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
1499 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1500 MAC_FILTER_IN_BEACON);
1501 iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, false);
1502 iwl_scan_offload_build_ssid(req, cmd->direct_scan, &ssid_bitmap, false);
1503
1504 cmd->schedule[0].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1505 cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1506 cmd->schedule[0].full_scan_mul = 1;
1507
1508 cmd->schedule[1].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1509 cmd->schedule[1].iterations = 0xff;
1510 cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1511
1512 iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1513 ssid_bitmap, cmd);
1514
1515 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1516 mvm->fw->ucode_capa.n_scan_channels);
1517
1518 iwl_mvm_build_unified_scan_probe(mvm, vif, ies, preq,
1519 req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1520 req->mac_addr : NULL,
1521 req->mac_addr_mask);
1522
1523 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1524 if (!ret) {
1525 IWL_DEBUG_SCAN(mvm,
1526 "Sched scan request was sent successfully\n");
1527 } else {
1528 /*
1529 * If the scan failed, it usually means that the FW was unable
1530 * to allocate the time events. Warn on it, but maybe we
1531 * should try to send the command again with different params.
1532 */
1533 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1534 mvm->scan_status = IWL_MVM_SCAN_NONE;
1535 ret = -EIO;
1536 }
1537 return ret;
1538 }
1539
1540
1541 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
1542 {
1543 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1544 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN,
1545 true);
1546
1547 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1548 return 0;
1549
1550 if (iwl_mvm_is_radio_killed(mvm)) {
1551 ieee80211_scan_completed(mvm->hw, true);
1552 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1553 mvm->scan_status = IWL_MVM_SCAN_NONE;
1554 return 0;
1555 }
1556
1557 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1558 return iwl_mvm_scan_offload_stop(mvm, true);
1559 return iwl_mvm_cancel_regular_scan(mvm);
1560 }
1561
1562 /* UMAC scan API */
1563
1564 struct iwl_umac_scan_done {
1565 struct iwl_mvm *mvm;
1566 enum iwl_umac_scan_uid_type type;
1567 };
1568
1569 static int rate_to_scan_rate_flag(unsigned int rate)
1570 {
1571 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1572 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
1573 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
1574 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
1575 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
1576 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
1577 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
1578 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
1579 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
1580 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
1581 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
1582 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
1583 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
1584 };
1585
1586 return rate_to_scan_rate[rate];
1587 }
1588
1589 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1590 {
1591 struct ieee80211_supported_band *band;
1592 unsigned int rates = 0;
1593 int i;
1594
1595 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1596 for (i = 0; i < band->n_bitrates; i++)
1597 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1598 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1599 for (i = 0; i < band->n_bitrates; i++)
1600 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1601
1602 /* Set both basic rates and supported rates */
1603 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1604
1605 return cpu_to_le32(rates);
1606 }
1607
1608 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1609 {
1610
1611 struct iwl_scan_config *scan_config;
1612 struct ieee80211_supported_band *band;
1613 int num_channels =
1614 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
1615 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
1616 int ret, i, j = 0, cmd_size, data_size;
1617 struct iwl_host_cmd cmd = {
1618 .id = SCAN_CFG_CMD,
1619 };
1620
1621 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1622 return -ENOBUFS;
1623
1624 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
1625
1626 scan_config = kzalloc(cmd_size, GFP_KERNEL);
1627 if (!scan_config)
1628 return -ENOMEM;
1629
1630 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
1631 scan_config->hdr.size = cpu_to_le16(data_size);
1632 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
1633 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1634 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1635 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1636 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1637 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1638 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1639 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
1640 SCAN_CONFIG_N_CHANNELS(num_channels));
1641 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1642 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1643 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1644 scan_config->out_of_channel_time = cpu_to_le32(170);
1645 scan_config->suspend_time = cpu_to_le32(30);
1646 scan_config->dwell_active = 20;
1647 scan_config->dwell_passive = 110;
1648 scan_config->dwell_fragmented = 20;
1649
1650 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1651
1652 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1653 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1654 IWL_CHANNEL_FLAG_ACCURATE_EBS |
1655 IWL_CHANNEL_FLAG_EBS_ADD |
1656 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1657
1658 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1659 for (i = 0; i < band->n_channels; i++, j++)
1660 scan_config->channel_array[j] = band->channels[i].center_freq;
1661 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1662 for (i = 0; i < band->n_channels; i++, j++)
1663 scan_config->channel_array[j] = band->channels[i].center_freq;
1664
1665 cmd.data[0] = scan_config;
1666 cmd.len[0] = cmd_size;
1667 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1668
1669 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1670
1671 ret = iwl_mvm_send_cmd(mvm, &cmd);
1672
1673 kfree(scan_config);
1674 return ret;
1675 }
1676
1677 static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1678 {
1679 int i;
1680
1681 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1682 if (mvm->scan_uid[i] == uid)
1683 return i;
1684
1685 return i;
1686 }
1687
1688 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1689 {
1690 return iwl_mvm_find_scan_uid(mvm, 0);
1691 }
1692
1693 static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm,
1694 enum iwl_umac_scan_uid_type type)
1695 {
1696 int i;
1697
1698 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1699 if (mvm->scan_uid[i] & type)
1700 return true;
1701
1702 return false;
1703 }
1704
1705 static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm,
1706 enum iwl_umac_scan_uid_type type)
1707 {
1708 u32 uid;
1709
1710 /* make sure exactly one bit is on in scan type */
1711 WARN_ON(hweight8(type) != 1);
1712
1713 /*
1714 * Make sure scan uids are unique. If one scan lasts long time while
1715 * others are completing frequently, the seq number will wrap up and
1716 * we may have more than one scan with the same uid.
1717 */
1718 do {
1719 uid = type | (mvm->scan_seq_num <<
1720 IWL_UMAC_SCAN_UID_SEQ_OFFSET);
1721 mvm->scan_seq_num++;
1722 } while (iwl_mvm_find_scan_uid(mvm, uid) <
1723 IWL_MVM_MAX_SIMULTANEOUS_SCANS);
1724
1725 IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
1726
1727 return uid;
1728 }
1729
1730 static void
1731 iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm *mvm,
1732 struct iwl_scan_req_umac *cmd,
1733 struct iwl_mvm_scan_params *params)
1734 {
1735 memset(cmd, 0, ksize(cmd));
1736 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1737 sizeof(struct iwl_mvm_umac_cmd_hdr));
1738 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1739 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1740 if (params->passive_fragmented)
1741 cmd->fragmented_dwell =
1742 params->dwell[IEEE80211_BAND_2GHZ].passive;
1743 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1744 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1745 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1746 }
1747
1748 static void
1749 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1750 struct ieee80211_channel **channels,
1751 int n_channels, u32 ssid_bitmap,
1752 struct iwl_scan_req_umac *cmd)
1753 {
1754 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1755 int i;
1756
1757 for (i = 0; i < n_channels; i++) {
1758 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1759 channel_cfg[i].channel_num = channels[i]->hw_value;
1760 channel_cfg[i].iter_count = 1;
1761 channel_cfg[i].iter_interval = 0;
1762 }
1763 }
1764
1765 static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids,
1766 struct cfg80211_ssid *ssids,
1767 int fragmented)
1768 {
1769 int flags = 0;
1770
1771 if (n_ssids == 0)
1772 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1773
1774 if (n_ssids == 1 && ssids[0].ssid_len != 0)
1775 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1776
1777 if (fragmented)
1778 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1779
1780 if (iwl_mvm_rrm_scan_needed(mvm))
1781 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1782
1783 return flags;
1784 }
1785
1786 int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1787 struct ieee80211_scan_request *req)
1788 {
1789 struct iwl_host_cmd hcmd = {
1790 .id = SCAN_REQ_UMAC,
1791 .len = { iwl_mvm_scan_size(mvm), },
1792 .data = { mvm->scan_cmd, },
1793 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1794 };
1795 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1796 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1797 sizeof(struct iwl_scan_channel_cfg_umac) *
1798 mvm->fw->ucode_capa.n_scan_channels;
1799 struct iwl_mvm_scan_params params = {};
1800 u32 uid, flags;
1801 u32 ssid_bitmap = 0;
1802 int ret, i, uid_idx;
1803
1804 lockdep_assert_held(&mvm->mutex);
1805
1806 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1807 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1808 return -EBUSY;
1809
1810 /* we should have failed registration if scan_cmd was NULL */
1811 if (WARN_ON(mvm->scan_cmd == NULL))
1812 return -ENOMEM;
1813
1814 if (WARN_ON(req->req.n_ssids > PROBE_OPTION_MAX ||
1815 req->ies.common_ie_len +
1816 req->ies.len[NL80211_BAND_2GHZ] +
1817 req->ies.len[NL80211_BAND_5GHZ] + 24 + 2 >
1818 SCAN_OFFLOAD_PROBE_REQ_SIZE || req->req.n_channels >
1819 mvm->fw->ucode_capa.n_scan_channels))
1820 return -ENOBUFS;
1821
1822 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1823 &params);
1824
1825 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1826
1827 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1828 mvm->scan_uid[uid_idx] = uid;
1829 cmd->uid = cpu_to_le32(uid);
1830
1831 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1832
1833 flags = iwl_mvm_scan_umac_common_flags(mvm, req->req.n_ssids,
1834 req->req.ssids,
1835 params.passive_fragmented);
1836
1837 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1838
1839 cmd->general_flags = cpu_to_le32(flags);
1840 cmd->n_channels = req->req.n_channels;
1841
1842 for (i = 0; i < req->req.n_ssids; i++)
1843 ssid_bitmap |= BIT(i);
1844
1845 iwl_mvm_umac_scan_cfg_channels(mvm, req->req.channels,
1846 req->req.n_channels, ssid_bitmap, cmd);
1847
1848 sec_part->schedule[0].iter_count = 1;
1849 sec_part->delay = 0;
1850
1851 iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, &sec_part->preq,
1852 req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1853 req->req.mac_addr : NULL,
1854 req->req.mac_addr_mask);
1855
1856 iwl_mvm_scan_fill_ssids(sec_part->direct_scan, req->req.ssids,
1857 req->req.n_ssids, 0);
1858
1859 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1860 if (!ret) {
1861 IWL_DEBUG_SCAN(mvm,
1862 "Scan request was sent successfully\n");
1863 } else {
1864 /*
1865 * If the scan failed, it usually means that the FW was unable
1866 * to allocate the time events. Warn on it, but maybe we
1867 * should try to send the command again with different params.
1868 */
1869 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1870 }
1871 return ret;
1872 }
1873
1874 int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1875 struct cfg80211_sched_scan_request *req,
1876 struct ieee80211_scan_ies *ies)
1877 {
1878
1879 struct iwl_host_cmd hcmd = {
1880 .id = SCAN_REQ_UMAC,
1881 .len = { iwl_mvm_scan_size(mvm), },
1882 .data = { mvm->scan_cmd, },
1883 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1884 };
1885 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1886 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1887 sizeof(struct iwl_scan_channel_cfg_umac) *
1888 mvm->fw->ucode_capa.n_scan_channels;
1889 struct iwl_mvm_scan_params params = {};
1890 u32 uid, flags;
1891 u32 ssid_bitmap = 0;
1892 int ret, uid_idx;
1893
1894 lockdep_assert_held(&mvm->mutex);
1895
1896 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1897 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1898 return -EBUSY;
1899
1900 /* we should have failed registration if scan_cmd was NULL */
1901 if (WARN_ON(mvm->scan_cmd == NULL))
1902 return -ENOMEM;
1903
1904 if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX ||
1905 ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1906 ies->len[NL80211_BAND_5GHZ] + 24 + 2 >
1907 SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels >
1908 mvm->fw->ucode_capa.n_scan_channels))
1909 return -ENOBUFS;
1910
1911 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags,
1912 &params);
1913
1914 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1915
1916 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1917
1918 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN);
1919 mvm->scan_uid[uid_idx] = uid;
1920 cmd->uid = cpu_to_le32(uid);
1921
1922 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1923
1924 flags = iwl_mvm_scan_umac_common_flags(mvm, req->n_ssids, req->ssids,
1925 params.passive_fragmented);
1926
1927 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1928
1929 if (iwl_mvm_scan_pass_all(mvm, req))
1930 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1931 else
1932 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1933
1934 cmd->general_flags = cpu_to_le32(flags);
1935
1936 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1937 mvm->last_ebs_successful)
1938 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1939 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1940 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1941
1942 cmd->n_channels = req->n_channels;
1943
1944 iwl_scan_offload_build_ssid(req, sec_part->direct_scan, &ssid_bitmap,
1945 false);
1946
1947 /* This API uses bits 0-19 instead of 1-20. */
1948 ssid_bitmap = ssid_bitmap >> 1;
1949
1950 iwl_mvm_umac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1951 ssid_bitmap, cmd);
1952
1953 sec_part->schedule[0].interval =
1954 cpu_to_le16(req->interval / MSEC_PER_SEC);
1955 sec_part->schedule[0].iter_count = 0xff;
1956
1957 sec_part->delay = 0;
1958
1959 iwl_mvm_build_unified_scan_probe(mvm, vif, ies, &sec_part->preq,
1960 req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1961 req->mac_addr : NULL,
1962 req->mac_addr_mask);
1963
1964 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1965 if (!ret) {
1966 IWL_DEBUG_SCAN(mvm,
1967 "Sched scan request was sent successfully\n");
1968 } else {
1969 /*
1970 * If the scan failed, it usually means that the FW was unable
1971 * to allocate the time events. Warn on it, but maybe we
1972 * should try to send the command again with different params.
1973 */
1974 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1975 }
1976 return ret;
1977 }
1978
1979 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1980 struct iwl_rx_cmd_buffer *rxb,
1981 struct iwl_device_cmd *cmd)
1982 {
1983 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1984 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1985 u32 uid = __le32_to_cpu(notif->uid);
1986 bool sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN);
1987 int uid_idx = iwl_mvm_find_scan_uid(mvm, uid);
1988
1989 /*
1990 * Scan uid may be set to zero in case of scan abort request from above.
1991 */
1992 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1993 return 0;
1994
1995 IWL_DEBUG_SCAN(mvm,
1996 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
1997 uid, sched ? "sched" : "regular",
1998 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1999 "completed" : "aborted",
2000 notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
2001 "success" : "failed");
2002
2003 mvm->last_ebs_successful = !notif->ebs_status;
2004 mvm->scan_uid[uid_idx] = 0;
2005
2006 if (!sched) {
2007 ieee80211_scan_completed(mvm->hw,
2008 notif->status ==
2009 IWL_SCAN_OFFLOAD_ABORTED);
2010 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2011 } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) {
2012 ieee80211_sched_scan_stopped(mvm->hw);
2013 } else {
2014 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
2015 }
2016
2017 return 0;
2018 }
2019
2020 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
2021 struct iwl_rx_packet *pkt, void *data)
2022 {
2023 struct iwl_umac_scan_done *scan_done = data;
2024 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
2025 u32 uid = __le32_to_cpu(notif->uid);
2026 int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid);
2027
2028 if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
2029 return false;
2030
2031 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
2032 return false;
2033
2034 /*
2035 * Clear scan uid of scans that was aborted from above and completed
2036 * in FW so the RX handler does nothing.
2037 */
2038 scan_done->mvm->scan_uid[uid_idx] = 0;
2039
2040 return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
2041 }
2042
2043 static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
2044 {
2045 struct iwl_umac_scan_abort cmd = {
2046 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
2047 sizeof(struct iwl_mvm_umac_cmd_hdr)),
2048 .uid = cpu_to_le32(uid),
2049 };
2050
2051 lockdep_assert_held(&mvm->mutex);
2052
2053 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
2054
2055 return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
2056 }
2057
2058 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
2059 enum iwl_umac_scan_uid_type type, bool notify)
2060 {
2061 struct iwl_notification_wait wait_scan_done;
2062 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, };
2063 struct iwl_umac_scan_done scan_done = {
2064 .mvm = mvm,
2065 .type = type,
2066 };
2067 int i, ret = -EIO;
2068
2069 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
2070 scan_done_notif,
2071 ARRAY_SIZE(scan_done_notif),
2072 iwl_scan_umac_done_check, &scan_done);
2073
2074 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
2075
2076 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) {
2077 if (mvm->scan_uid[i] & type) {
2078 int err;
2079
2080 if (iwl_mvm_is_radio_killed(mvm) &&
2081 (type & IWL_UMAC_SCAN_UID_REG_SCAN)) {
2082 ieee80211_scan_completed(mvm->hw, true);
2083 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2084 break;
2085 }
2086
2087 err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
2088 if (!err)
2089 ret = 0;
2090 }
2091 }
2092
2093 if (ret) {
2094 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
2095 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
2096 return ret;
2097 }
2098
2099 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
2100 if (ret)
2101 return ret;
2102
2103 if (notify) {
2104 if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN)
2105 ieee80211_sched_scan_stopped(mvm->hw);
2106 if (type & IWL_UMAC_SCAN_UID_REG_SCAN) {
2107 ieee80211_scan_completed(mvm->hw, true);
2108 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2109 }
2110 }
2111
2112 return ret;
2113 }
2114
2115 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
2116 {
2117 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2118 return sizeof(struct iwl_scan_req_umac) +
2119 sizeof(struct iwl_scan_channel_cfg_umac) *
2120 mvm->fw->ucode_capa.n_scan_channels +
2121 sizeof(struct iwl_scan_req_umac_tail);
2122
2123 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2124 return sizeof(struct iwl_scan_req_unified_lmac) +
2125 sizeof(struct iwl_scan_channel_cfg_lmac) *
2126 mvm->fw->ucode_capa.n_scan_channels +
2127 sizeof(struct iwl_scan_probe_req);
2128
2129 return sizeof(struct iwl_scan_cmd) +
2130 mvm->fw->ucode_capa.max_probe_length +
2131 mvm->fw->ucode_capa.n_scan_channels *
2132 sizeof(struct iwl_scan_channel);
2133 }
Linux kernel - Deliverables
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