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iwlwifi: mvm: implement UMAC scan API
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
CommitLineData
8ca151b5
JB		 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 *
51368bf7 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8b4139dc 9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
8ca151b5
JB		 10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
410dc5aa 26 * in the file called COPYING.
8ca151b5
JB		 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 *
51368bf7 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
8b4139dc 35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
8ca151b5
JB		 36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65
66#include <linux/etherdevice.h>
67#include <net/mac80211.h>
68
69#include "mvm.h"
70#include "iwl-eeprom-parse.h"
71#include "fw-api-scan.h"
72
73#define IWL_PLCP_QUIET_THRESH 1
74#define IWL_ACTIVE_QUIET_TIME 10
8a110d9b
AB		 75
76struct iwl_mvm_scan_params {
77 u32 max_out_time;
78 u32 suspend_time;
50df8a30
AB		 79 bool passive_fragmented;
80 struct _dwell {
81 u16 passive;
82 u16 active;
83 } dwell[IEEE80211_NUM_BANDS];
8a110d9b 84};
8ca151b5 85
d2496221
DS		 86enum iwl_umac_scan_uid_type {
87 IWL_UMAC_SCAN_UID_REG_SCAN = BIT(0),
88 IWL_UMAC_SCAN_UID_SCHED_SCAN = BIT(1),
89 IWL_UMAC_SCAN_UID_ALL = IWL_UMAC_SCAN_UID_REG_SCAN |
90 IWL_UMAC_SCAN_UID_SCHED_SCAN,
91};
92
93static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
94 enum iwl_umac_scan_uid_type type, bool notify);
95
96static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
97{
98 if (mvm->scan_rx_ant != ANT_NONE)
99 return mvm->scan_rx_ant;
100 return mvm->fw->valid_rx_ant;
101}
102
8ca151b5
JB		 103static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
104{
105 u16 rx_chain;
91b05d10 106 u8 rx_ant;
8ca151b5 107
d2496221 108 rx_ant = iwl_mvm_scan_rx_ant(mvm);
8ca151b5
JB		 109 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
110 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
111 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
112 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
113 return cpu_to_le16(rx_chain);
114}
115
fb98be5e 116static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
8ca151b5 117{
fb98be5e 118 if (band == IEEE80211_BAND_2GHZ)
8ca151b5
JB		 119 return cpu_to_le32(PHY_BAND_24);
120 else
121 return cpu_to_le32(PHY_BAND_5);
122}
123
124static inline __le32
125iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
126 bool no_cck)
127{
128 u32 tx_ant;
129
130 mvm->scan_last_antenna_idx =
4ed735e7 131 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
8ca151b5
JB		 132 mvm->scan_last_antenna_idx);
133 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
134
135 if (band == IEEE80211_BAND_2GHZ && !no_cck)
136 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
137 tx_ant);
138 else
139 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
140}
141
142/*
143 * We insert the SSIDs in an inverted order, because the FW will
144 * invert it back. The most prioritized SSID, which is first in the
145 * request list, is not copied here, but inserted directly to the probe
146 * request.
147 */
fb98be5e
DS		 148static void iwl_mvm_scan_fill_ssids(struct iwl_ssid_ie *cmd_ssid,
149 struct cfg80211_ssid *ssids,
150 int n_ssids, int first)
8ca151b5
JB		 151{
152 int fw_idx, req_idx;
153
fb98be5e 154 for (req_idx = n_ssids - 1, fw_idx = 0; req_idx >= first;
fe04e837 155 req_idx--, fw_idx++) {
fb98be5e
DS		 156 cmd_ssid[fw_idx].id = WLAN_EID_SSID;
157 cmd_ssid[fw_idx].len = ssids[req_idx].ssid_len;
158 memcpy(cmd_ssid[fw_idx].ssid,
159 ssids[req_idx].ssid,
160 ssids[req_idx].ssid_len);
8ca151b5
JB		 161 }
162}
163
164/*
165 * If req->n_ssids > 0, it means we should do an active scan.
166 * In case of active scan w/o directed scan, we receive a zero-length SSID
167 * just to notify that this scan is active and not passive.
168 * In order to notify the FW of the number of SSIDs we wish to scan (including
169 * the zero-length one), we need to set the corresponding bits in chan->type,
20f1a5de
DS		 170 * one for each SSID, and set the active bit (first). If the first SSID is
171 * already included in the probe template, so we need to set only
172 * req->n_ssids - 1 bits in addition to the first bit.
8ca151b5
JB		 173 */
174static u16 iwl_mvm_get_active_dwell(enum ieee80211_band band, int n_ssids)
175{
176 if (band == IEEE80211_BAND_2GHZ)
39745337
DS		 177 return 20 + 3 * (n_ssids + 1);
178 return 10 + 2 * (n_ssids + 1);
8ca151b5
JB		 179}
180
181static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band)
182{
183 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
184}
185
186static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd,
20f1a5de 187 struct cfg80211_scan_request *req,
50df8a30
AB		 188 bool basic_ssid,
189 struct iwl_mvm_scan_params *params)
8ca151b5 190{
8ca151b5
JB		 191 struct iwl_scan_channel *chan = (struct iwl_scan_channel *)
192 (cmd->data + le16_to_cpu(cmd->tx_cmd.len));
193 int i;
20f1a5de 194 int type = BIT(req->n_ssids) - 1;
50df8a30 195 enum ieee80211_band band = req->channels[0]->band;
20f1a5de
DS		 196
197 if (!basic_ssid)
198 type |= BIT(req->n_ssids);
8ca151b5
JB		 199
200 for (i = 0; i < cmd->channel_count; i++) {
201 chan->channel = cpu_to_le16(req->channels[i]->hw_value);
20f1a5de 202 chan->type = cpu_to_le32(type);
8fe02e16 203 if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR)
bb963c4a 204 chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE);
50df8a30
AB		 205 chan->active_dwell = cpu_to_le16(params->dwell[band].active);
206 chan->passive_dwell = cpu_to_le16(params->dwell[band].passive);
8ca151b5
JB		 207 chan->iteration_count = cpu_to_le16(1);
208 chan++;
209 }
210}
211
212/*
213 * Fill in probe request with the following parameters:
214 * TA is our vif HW address, which mac80211 ensures we have.
215 * Packet is broadcasted, so this is both SA and DA.
216 * The probe request IE is made out of two: first comes the most prioritized
217 * SSID if a directed scan is requested. Second comes whatever extra
218 * information was given to us as the scan request IE.
219 */
220static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
221 int n_ssids, const u8 *ssid, int ssid_len,
633e2713
DS		 222 const u8 *band_ie, int band_ie_len,
223 const u8 *common_ie, int common_ie_len,
8ca151b5
JB		 224 int left)
225{
226 int len = 0;
227 u8 *pos = NULL;
228
229 /* Make sure there is enough space for the probe request,
230 * two mandatory IEs and the data */
231 left -= 24;
232 if (left < 0)
233 return 0;
234
235 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
236 eth_broadcast_addr(frame->da);
237 memcpy(frame->sa, ta, ETH_ALEN);
238 eth_broadcast_addr(frame->bssid);
239 frame->seq_ctrl = 0;
240
241 len += 24;
242
243 /* for passive scans, no need to fill anything */
244 if (n_ssids == 0)
245 return (u16)len;
246
247 /* points to the payload of the request */
248 pos = &frame->u.probe_req.variable[0];
249
250 /* fill in our SSID IE */
251 left -= ssid_len + 2;
252 if (left < 0)
253 return 0;
254 *pos++ = WLAN_EID_SSID;
255 *pos++ = ssid_len;
256 if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */
257 memcpy(pos, ssid, ssid_len);
258 pos += ssid_len;
259 }
260
261 len += ssid_len + 2;
262
633e2713 263 if (WARN_ON(left < band_ie_len + common_ie_len))
8ca151b5
JB		 264 return len;
265
633e2713
DS		 266 if (band_ie && band_ie_len) {
267 memcpy(pos, band_ie, band_ie_len);
268 pos += band_ie_len;
269 len += band_ie_len;
270 }
271
272 if (common_ie && common_ie_len) {
273 memcpy(pos, common_ie, common_ie_len);
274 pos += common_ie_len;
275 len += common_ie_len;
8ca151b5
JB		 276 }
277
278 return (u16)len;
279}
280
8a110d9b
AB		 281static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
282 struct ieee80211_vif *vif)
61f6325d 283{
8a110d9b
AB		 284 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
285 bool *global_bound = data;
61f6325d 286
1e2ebe0e
DS		 287 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
288 mvmvif->phy_ctxt->id < MAX_PHYS)
8a110d9b
AB		 289 *global_bound = true;
290}
291
292static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
50df8a30 293 struct ieee80211_vif *vif,
ab480030 294 int n_ssids, u32 flags,
8a110d9b
AB		 295 struct iwl_mvm_scan_params *params)
296{
297 bool global_bound = false;
50df8a30 298 enum ieee80211_band band;
2ce89cd6 299 u8 frag_passive_dwell = 0;
8a110d9b
AB		 300
301 ieee80211_iterate_active_interfaces_atomic(mvm->hw,
302 IEEE80211_IFACE_ITER_NORMAL,
303 iwl_mvm_scan_condition_iterator,
304 &global_bound);
ef67f18d
AB		 305
306 if (!global_bound)
307 goto not_bound;
308
2ce89cd6
DS		 309 params->suspend_time = 30;
310 params->max_out_time = 170;
ef67f18d
AB		 311
312 if (iwl_mvm_low_latency(mvm)) {
2ce89cd6
DS		 313 if (mvm->fw->ucode_capa.api[0] &
314 IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
315 params->suspend_time = 105;
316 params->max_out_time = 70;
317 frag_passive_dwell = 20;
318 } else {
319 params->suspend_time = 120;
320 params->max_out_time = 120;
321 }
322 }
323
324 if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
325 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
326 /*
327 * P2P device scan should not be fragmented to avoid negative
328 * impact on P2P device discovery. Configure max_out_time to be
329 * equal to dwell time on passive channel. Take a longest
330 * possible value, one that corresponds to 2GHz band
331 */
332 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
333 u32 passive_dwell =
334 iwl_mvm_get_passive_dwell(IEEE80211_BAND_2GHZ);
335 params->max_out_time = passive_dwell;
336 } else {
337 params->passive_fragmented = true;
338 }
50df8a30 339 }
8a110d9b 340
ab480030
JB		 341 if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
342 params->max_out_time = 200;
343
ef67f18d
AB		 344not_bound:
345
50df8a30 346 for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
2ce89cd6
DS		 347 if (params->passive_fragmented)
348 params->dwell[band].passive = frag_passive_dwell;
349 else
350 params->dwell[band].passive =
351 iwl_mvm_get_passive_dwell(band);
50df8a30
AB		 352 params->dwell[band].active = iwl_mvm_get_active_dwell(band,
353 n_ssids);
354 }
61f6325d
HD		 355}
356
73897bd1
AO		 357static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
358{
359 /* require rrm scan whenever the fw supports it */
360 return mvm->fw->ucode_capa.capa[0] &
361 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
362}
363
48849a41
AO		 364static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm,
365 bool is_sched_scan)
366{
367 int max_probe_len;
368
369 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
370 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
371 else
372 max_probe_len = mvm->fw->ucode_capa.max_probe_length;
373
374 /* we create the 802.11 header and SSID element */
375 max_probe_len -= 24 + 2;
376
377 /* basic ssid is added only for hw_scan with and old api */
378 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) &&
379 !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) &&
380 !is_sched_scan)
381 max_probe_len -= 32;
382
66dc5272
AO		 383 /* DS parameter set element is added on 2.4GHZ band if required */
384 if (iwl_mvm_rrm_scan_needed(mvm))
385 max_probe_len -= 3;
386
48849a41
AO		 387 return max_probe_len;
388}
389
390int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan)
391{
392 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan);
393
394 if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN))
395 return max_ie_len;
396
397 /* TODO: [BUG] This function should return the maximum allowed size of
398 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
399 * in the same command. So the correct implementation of this function
400 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
401 * command has only 512 bytes and it would leave us with about 240
402 * bytes for scan IEs, which is clearly not enough. So meanwhile
403 * we will report an incorrect value. This may result in a failure to
404 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
405 * functions with -ENOBUFS, if a large enough probe will be provided.
406 */
407 return max_ie_len;
408}
409
8ca151b5
JB		 410int iwl_mvm_scan_request(struct iwl_mvm *mvm,
411 struct ieee80211_vif *vif,
412 struct cfg80211_scan_request *req)
413{
414 struct iwl_host_cmd hcmd = {
415 .id = SCAN_REQUEST_CMD,
416 .len = { 0, },
417 .data = { mvm->scan_cmd, },
8ca151b5
JB		 418 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
419 };
420 struct iwl_scan_cmd *cmd = mvm->scan_cmd;
421 int ret;
422 u32 status;
423 int ssid_len = 0;
424 u8 *ssid = NULL;
20f1a5de
DS		 425 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
426 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
8a110d9b 427 struct iwl_mvm_scan_params params = {};
8ca151b5
JB		 428
429 lockdep_assert_held(&mvm->mutex);
748fa67c
EG		 430
431 /* we should have failed registration if scan_cmd was NULL */
432 if (WARN_ON(mvm->scan_cmd == NULL))
433 return -ENOMEM;
8ca151b5
JB		 434
435 IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
436 mvm->scan_status = IWL_MVM_SCAN_OS;
0564679b 437 memset(cmd, 0, ksize(cmd));
8a110d9b 438
8ca151b5
JB		 439 cmd->channel_count = (u8)req->n_channels;
440 cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
441 cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
442 cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
8a110d9b 443
ab480030 444 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, &params);
8a110d9b
AB		 445 cmd->max_out_time = cpu_to_le32(params.max_out_time);
446 cmd->suspend_time = cpu_to_le32(params.suspend_time);
50df8a30
AB		 447 if (params.passive_fragmented)
448 cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
8a110d9b 449
fb98be5e 450 cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
8ca151b5
JB		 451 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
452 MAC_FILTER_IN_BEACON);
d91b06d2
IP		 453
454 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
455 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
456 else
457 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
458
8ca151b5
JB		 459 cmd->repeats = cpu_to_le32(1);
460
461 /*
462 * If the user asked for passive scan, don't change to active scan if
463 * you see any activity on the channel - remain passive.
464 */
465 if (req->n_ssids > 0) {
466 cmd->passive2active = cpu_to_le16(1);
26e05cc3 467 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
20f1a5de
DS		 468 if (basic_ssid) {
469 ssid = req->ssids[0].ssid;
470 ssid_len = req->ssids[0].ssid_len;
471 }
8ca151b5
JB		 472 } else {
473 cmd->passive2active = 0;
26e05cc3 474 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
8ca151b5
JB		 475 }
476
fb98be5e
DS		 477 iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids,
478 basic_ssid ? 1 : 0);
8ca151b5 479
8e2a866e 480 cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
3856b78c
EG		 481 3 << TX_CMD_FLG_BT_PRIO_POS);
482
8ca151b5
JB		 483 cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
484 cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
485 cmd->tx_cmd.rate_n_flags =
486 iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
487 req->no_cck);
488
489 cmd->tx_cmd.len =
490 cpu_to_le16(iwl_mvm_fill_probe_req(
491 (struct ieee80211_mgmt *)cmd->data,
492 vif->addr,
493 req->n_ssids, ssid, ssid_len,
633e2713 494 req->ie, req->ie_len, NULL, 0,
8ca151b5
JB		 495 mvm->fw->ucode_capa.max_probe_length));
496
50df8a30 497 iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, &params);
8ca151b5
JB		 498
499 cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
500 le16_to_cpu(cmd->tx_cmd.len) +
501 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
502 hcmd.len[0] = le16_to_cpu(cmd->len);
503
504 status = SCAN_RESPONSE_OK;
505 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
506 if (!ret && status == SCAN_RESPONSE_OK) {
507 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
508 } else {
509 /*
510 * If the scan failed, it usually means that the FW was unable
511 * to allocate the time events. Warn on it, but maybe we
512 * should try to send the command again with different params.
513 */
514 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
515 status, ret);
516 mvm->scan_status = IWL_MVM_SCAN_NONE;
517 ret = -EIO;
518 }
519 return ret;
520}
521
522int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
523 struct iwl_device_cmd *cmd)
524{
525 struct iwl_rx_packet *pkt = rxb_addr(rxb);
526 struct iwl_cmd_response *resp = (void *)pkt->data;
527
528 IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
529 le32_to_cpu(resp->status));
530 return 0;
531}
532
533int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
534 struct iwl_device_cmd *cmd)
535{
536 struct iwl_rx_packet *pkt = rxb_addr(rxb);
537 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
538
91b80256
AN		 539 lockdep_assert_held(&mvm->mutex);
540
8ca151b5
JB		 541 IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
542 notif->status, notif->scanned_channels);
543
91b80256
AN		 544 if (mvm->scan_status == IWL_MVM_SCAN_OS)
545 mvm->scan_status = IWL_MVM_SCAN_NONE;
8ca151b5
JB		 546 ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
547
519e2026
AN		 548 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
549
8ca151b5
JB		 550 return 0;
551}
552
fb98be5e
DS		 553int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
554 struct iwl_rx_cmd_buffer *rxb,
555 struct iwl_device_cmd *cmd)
35a000b7
DS		 556{
557 struct iwl_rx_packet *pkt = rxb_addr(rxb);
fb98be5e 558
d2496221
DS		 559 if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
560 !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
fb98be5e 561 struct iwl_sched_scan_results *notif = (void *)pkt->data;
35a000b7 562
d2496221
DS		 563 if (!(notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN))
564 return 0;
fb98be5e
DS		 565 }
566
d2496221
DS		 567 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
568 ieee80211_sched_scan_results(mvm->hw);
35a000b7
DS		 569
570 return 0;
571}
572
8ca151b5
JB		 573static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
574 struct iwl_rx_packet *pkt, void *data)
575{
576 struct iwl_mvm *mvm =
577 container_of(notif_wait, struct iwl_mvm, notif_wait);
578 struct iwl_scan_complete_notif *notif;
579 u32 *resp;
580
581 switch (pkt->hdr.cmd) {
582 case SCAN_ABORT_CMD:
583 resp = (void *)pkt->data;
584 if (*resp == CAN_ABORT_STATUS) {
585 IWL_DEBUG_SCAN(mvm,
586 "Scan can be aborted, wait until completion\n");
587 return false;
588 }
589
5a3e9f7f
EG		 590 /*
591 * If scan cannot be aborted, it means that we had a
592 * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
593 * ieee80211_scan_completed already.
594 */
8ca151b5
JB		 595 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
596 *resp);
597 return true;
598
599 case SCAN_COMPLETE_NOTIFICATION:
600 notif = (void *)pkt->data;
601 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
602 notif->status);
603 return true;
604
605 default:
606 WARN_ON(1);
607 return false;
608 };
609}
610
fb98be5e 611static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm)
8ca151b5
JB		 612{
613 struct iwl_notification_wait wait_scan_abort;
614 static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
615 SCAN_COMPLETE_NOTIFICATION };
616 int ret;
617
618 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
619 scan_abort_notif,
620 ARRAY_SIZE(scan_abort_notif),
621 iwl_mvm_scan_abort_notif, NULL);
622
a1022927 623 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
8ca151b5
JB		 624 if (ret) {
625 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
992f81fc 626 /* mac80211's state will be cleaned in the nic_restart flow */
8ca151b5
JB		 627 goto out_remove_notif;
628 }
629
91b80256 630 return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
8ca151b5
JB		 631
632out_remove_notif:
633 iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
91b80256 634 return ret;
8ca151b5 635}
35a000b7
DS		 636
637int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
638 struct iwl_rx_cmd_buffer *rxb,
639 struct iwl_device_cmd *cmd)
640{
641 struct iwl_rx_packet *pkt = rxb_addr(rxb);
fb98be5e
DS		 642 u8 status, ebs_status;
643
644 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
645 struct iwl_periodic_scan_complete *scan_notif;
35a000b7 646
fb98be5e
DS		 647 scan_notif = (void *)pkt->data;
648 status = scan_notif->status;
649 ebs_status = scan_notif->ebs_status;
650 } else {
651 struct iwl_scan_offload_complete *scan_notif;
652
653 scan_notif = (void *)pkt->data;
654 status = scan_notif->status;
655 ebs_status = scan_notif->ebs_status;
656 }
a6623e84
JB		 657 /* scan status must be locked for proper checking */
658 lockdep_assert_held(&mvm->mutex);
659
e820c2da 660 IWL_DEBUG_SCAN(mvm,
fb98be5e
DS		 661 "%s completed, status %s, EBS status %s\n",
662 mvm->scan_status == IWL_MVM_SCAN_SCHED ?
663 "Scheduled scan" : "Scan",
664 status == IWL_SCAN_OFFLOAD_COMPLETED ?
665 "completed" : "aborted",
666 ebs_status == IWL_SCAN_EBS_SUCCESS ?
667 "success" : "failed");
e820c2da 668
35a000b7 669
33ea27f6
AN		 670 /* only call mac80211 completion if the stop was initiated by FW */
671 if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
a6623e84 672 mvm->scan_status = IWL_MVM_SCAN_NONE;
33ea27f6 673 ieee80211_sched_scan_stopped(mvm->hw);
fb98be5e
DS		 674 } else if (mvm->scan_status == IWL_MVM_SCAN_OS) {
675 mvm->scan_status = IWL_MVM_SCAN_NONE;
676 ieee80211_scan_completed(mvm->hw,
677 status == IWL_SCAN_OFFLOAD_ABORTED);
4ff78181 678 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
33ea27f6 679 }
35a000b7 680
fb98be5e 681 mvm->last_ebs_successful = !ebs_status;
e820c2da 682
35a000b7
DS		 683 return 0;
684}
685
686static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
687 struct ieee80211_vif *vif,
633e2713 688 struct ieee80211_scan_ies *ies,
35a000b7
DS		 689 enum ieee80211_band band,
690 struct iwl_tx_cmd *cmd,
691 u8 *data)
692{
693 u16 cmd_len;
694
695 cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
696 cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
697 cmd->sta_id = mvm->aux_sta.sta_id;
698
699 cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
700
701 cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
702 vif->addr,
703 1, NULL, 0,
633e2713
DS		 704 ies->ies[band], ies->len[band],
705 ies->common_ies, ies->common_ie_len,
35a000b7
DS		 706 SCAN_OFFLOAD_PROBE_REQ_SIZE);
707 cmd->len = cpu_to_le16(cmd_len);
708}
709
710static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
711 struct ieee80211_vif *vif,
712 struct cfg80211_sched_scan_request *req,
50df8a30
AB		 713 struct iwl_scan_offload_cmd *scan,
714 struct iwl_mvm_scan_params *params)
35a000b7 715{
89879413 716 scan->channel_count = req->n_channels;
35a000b7
DS		 717 scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
718 scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
719 scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
720 scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
8a110d9b 721
50df8a30
AB		 722 scan->max_out_time = cpu_to_le32(params->max_out_time);
723 scan->suspend_time = cpu_to_le32(params->suspend_time);
8a110d9b 724
35a000b7
DS		 725 scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
726 MAC_FILTER_IN_BEACON);
727 scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
728 scan->rep_count = cpu_to_le32(1);
50df8a30
AB		 729
730 if (params->passive_fragmented)
731 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
35a000b7
DS		 732}
733
734static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
735{
736 int i;
737
738 for (i = 0; i < PROBE_OPTION_MAX; i++) {
739 if (!ssid_list[i].len)
740 break;
741 if (ssid_list[i].len == ssid_len &&
742 !memcmp(ssid_list->ssid, ssid, ssid_len))
743 return i;
744 }
745 return -1;
746}
747
748static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
fb98be5e
DS		 749 struct iwl_ssid_ie *direct_scan,
750 u32 *ssid_bitmap, bool basic_ssid)
35a000b7
DS		 751{
752 int i, j;
753 int index;
754
755 /*
756 * copy SSIDs from match list.
757 * iwl_config_sched_scan_profiles() uses the order of these ssids to
758 * config match list.
759 */
760 for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
ea73cbce
JB		 761 /* skip empty SSID matchsets */
762 if (!req->match_sets[i].ssid.ssid_len)
763 continue;
fb98be5e
DS		 764 direct_scan[i].id = WLAN_EID_SSID;
765 direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
766 memcpy(direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
767 direct_scan[i].len);
35a000b7
DS		 768 }
769
770 /* add SSIDs from scan SSID list */
771 *ssid_bitmap = 0;
772 for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
773 index = iwl_ssid_exist(req->ssids[j].ssid,
774 req->ssids[j].ssid_len,
fb98be5e 775 direct_scan);
35a000b7 776 if (index < 0) {
fb98be5e 777 if (!req->ssids[j].ssid_len && basic_ssid)
35a000b7 778 continue;
fb98be5e
DS		 779 direct_scan[i].id = WLAN_EID_SSID;
780 direct_scan[i].len = req->ssids[j].ssid_len;
781 memcpy(direct_scan[i].ssid, req->ssids[j].ssid,
782 direct_scan[i].len);
35a000b7
DS		 783 *ssid_bitmap |= BIT(i + 1);
784 i++;
785 } else {
786 *ssid_bitmap |= BIT(index + 1);
787 }
788 }
789}
790
791static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
792 struct cfg80211_sched_scan_request *req,
762533ba 793 u8 *channels_buffer,
35a000b7 794 enum ieee80211_band band,
89879413 795 int *head,
50df8a30
AB		 796 u32 ssid_bitmap,
797 struct iwl_mvm_scan_params *params)
35a000b7 798{
762533ba
DS		 799 u32 n_channels = mvm->fw->ucode_capa.n_scan_channels;
800 __le32 *type = (__le32 *)channels_buffer;
801 __le16 *channel_number = (__le16 *)(type + n_channels);
802 __le16 *iter_count = channel_number + n_channels;
803 __le32 *iter_interval = (__le32 *)(iter_count + n_channels);
804 u8 *active_dwell = (u8 *)(iter_interval + n_channels);
805 u8 *passive_dwell = active_dwell + n_channels;
89879413 806 int i, index = 0;
35a000b7 807
89879413
EP		 808 for (i = 0; i < req->n_channels; i++) {
809 struct ieee80211_channel *chan = req->channels[i];
810
811 if (chan->band != band)
812 continue;
35a000b7 813
89879413
EP		 814 index = *head;
815 (*head)++;
816
762533ba
DS		 817 channel_number[index] = cpu_to_le16(chan->hw_value);
818 active_dwell[index] = params->dwell[band].active;
819 passive_dwell[index] = params->dwell[band].passive;
35a000b7 820
762533ba
DS		 821 iter_count[index] = cpu_to_le16(1);
822 iter_interval[index] = 0;
35a000b7 823
89879413 824 if (!(chan->flags & IEEE80211_CHAN_NO_IR))
762533ba 825 type[index] |=
35a000b7
DS		 826 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
827
762533ba
DS		 828 type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL |
829 IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
35a000b7 830
89879413 831 if (chan->flags & IEEE80211_CHAN_NO_HT40)
762533ba 832 type[index] |=
35a000b7
DS		 833 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
834
835 /* scan for all SSIDs from req->ssids */
762533ba 836 type[index] |= cpu_to_le32(ssid_bitmap);
35a000b7
DS		 837 }
838}
839
840int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
841 struct ieee80211_vif *vif,
842 struct cfg80211_sched_scan_request *req,
633e2713 843 struct ieee80211_scan_ies *ies)
35a000b7 844{
35a000b7
DS		 845 int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
846 int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
847 int head = 0;
35a000b7
DS		 848 u32 ssid_bitmap;
849 int cmd_len;
850 int ret;
762533ba 851 u8 *probes;
fb98be5e
DS		 852 bool basic_ssid = !(mvm->fw->ucode_capa.flags &
853 IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
35a000b7
DS		 854
855 struct iwl_scan_offload_cfg *scan_cfg;
856 struct iwl_host_cmd cmd = {
857 .id = SCAN_OFFLOAD_CONFIG_CMD,
35a000b7 858 };
50df8a30 859 struct iwl_mvm_scan_params params = {};
35a000b7
DS		 860
861 lockdep_assert_held(&mvm->mutex);
862
35a000b7 863 cmd_len = sizeof(struct iwl_scan_offload_cfg) +
762533ba 864 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE +
66092537 865 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
35a000b7
DS		 866
867 scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
868 if (!scan_cfg)
869 return -ENOMEM;
870
762533ba
DS		 871 probes = scan_cfg->data +
872 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE;
873
ab480030 874 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
50df8a30 875 iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, &params);
35a000b7
DS		 876 scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
877
fb98be5e
DS		 878 iwl_scan_offload_build_ssid(req, scan_cfg->scan_cmd.direct_scan,
879 &ssid_bitmap, basic_ssid);
35a000b7
DS		 880 /* build tx frames for supported bands */
881 if (band_2ghz) {
882 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
883 IEEE80211_BAND_2GHZ,
884 &scan_cfg->scan_cmd.tx_cmd[0],
762533ba
DS		 885 probes);
886 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
89879413 887 IEEE80211_BAND_2GHZ, &head,
50df8a30 888 ssid_bitmap, &params);
35a000b7
DS		 889 }
890 if (band_5ghz) {
891 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
892 IEEE80211_BAND_5GHZ,
893 &scan_cfg->scan_cmd.tx_cmd[1],
762533ba 894 probes +
35a000b7 895 SCAN_OFFLOAD_PROBE_REQ_SIZE);
762533ba 896 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
89879413 897 IEEE80211_BAND_5GHZ, &head,
50df8a30 898 ssid_bitmap, &params);
35a000b7
DS		 899 }
900
901 cmd.data[0] = scan_cfg;
902 cmd.len[0] = cmd_len;
903 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
904
905 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
906
907 ret = iwl_mvm_send_cmd(mvm, &cmd);
908 kfree(scan_cfg);
909 return ret;
910}
911
912int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
913 struct cfg80211_sched_scan_request *req)
914{
915 struct iwl_scan_offload_profile *profile;
916 struct iwl_scan_offload_profile_cfg *profile_cfg;
917 struct iwl_scan_offload_blacklist *blacklist;
918 struct iwl_host_cmd cmd = {
919 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
35a000b7
DS		 920 .len[1] = sizeof(*profile_cfg),
921 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
922 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
923 };
924 int blacklist_len;
925 int i;
926 int ret;
927
928 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
929 return -EIO;
930
931 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
932 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
933 else
934 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
935
936 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
937 if (!blacklist)
938 return -ENOMEM;
939
940 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
941 if (!profile_cfg) {
942 ret = -ENOMEM;
943 goto free_blacklist;
944 }
945
946 cmd.data[0] = blacklist;
947 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
948 cmd.data[1] = profile_cfg;
949
950 /* No blacklist configuration */
951
952 profile_cfg->num_profiles = req->n_match_sets;
953 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
954 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
955 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
6e0bbe5e
DS		 956 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
957 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
35a000b7
DS		 958
959 for (i = 0; i < req->n_match_sets; i++) {
960 profile = &profile_cfg->profiles[i];
961 profile->ssid_index = i;
962 /* Support any cipher and auth algorithm */
963 profile->unicast_cipher = 0xff;
964 profile->auth_alg = 0xff;
965 profile->network_type = IWL_NETWORK_TYPE_ANY;
966 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
967 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
968 }
969
970 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
971
972 ret = iwl_mvm_send_cmd(mvm, &cmd);
973 kfree(profile_cfg);
974free_blacklist:
975 kfree(blacklist);
976
977 return ret;
978}
979
d2496221
DS		 980static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
981 struct cfg80211_sched_scan_request *req)
982{
983 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
984 IWL_DEBUG_SCAN(mvm,
985 "Sending scheduled scan with filtering, n_match_sets %d\n",
986 req->n_match_sets);
987 return false;
988 }
989
990 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
991 return true;
992}
993
35a000b7
DS		 994int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
995 struct cfg80211_sched_scan_request *req)
996{
997 struct iwl_scan_offload_req scan_req = {
998 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
999
1000 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
b14fc2be 1001 .schedule_line[0].delay = cpu_to_le16(req->interval / 1000),
35a000b7
DS		 1002 .schedule_line[0].full_scan_mul = 1,
1003
1004 .schedule_line[1].iterations = 0xff,
b14fc2be 1005 .schedule_line[1].delay = cpu_to_le16(req->interval / 1000),
35a000b7
DS		 1006 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
1007 };
1008
d2496221 1009 if (iwl_mvm_scan_pass_all(mvm, req))
de33fb5e 1010 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
35a000b7 1011
e820c2da
HD		 1012 if (mvm->last_ebs_successful &&
1013 mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
1014 scan_req.flags |=
1015 cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
1016
a1022927 1017 return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
35a000b7
DS		 1018 sizeof(scan_req), &scan_req);
1019}
1020
b141c235
LC		 1021int iwl_mvm_scan_offload_start(struct iwl_mvm *mvm,
1022 struct ieee80211_vif *vif,
1023 struct cfg80211_sched_scan_request *req,
1024 struct ieee80211_scan_ies *ies)
1025{
1026 int ret;
1027
1028 if ((mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
d2496221 1029 mvm->scan_status = IWL_MVM_SCAN_SCHED;
b141c235
LC		 1030 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1031 if (ret)
1032 return ret;
1033 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
d2496221
DS		 1034 } else if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1035 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1036 if (ret)
1037 return ret;
1038 ret = iwl_mvm_sched_scan_umac(mvm, vif, req, ies);
b141c235 1039 } else {
d2496221 1040 mvm->scan_status = IWL_MVM_SCAN_SCHED;
b141c235
LC		 1041 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1042 if (ret)
1043 return ret;
1044 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1045 if (ret)
1046 return ret;
1047 ret = iwl_mvm_sched_scan_start(mvm, req);
1048 }
1049
1050 return ret;
1051}
1052
fb98be5e 1053static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
35a000b7
DS		 1054{
1055 int ret;
1056 struct iwl_host_cmd cmd = {
1057 .id = SCAN_OFFLOAD_ABORT_CMD,
35a000b7
DS		 1058 };
1059 u32 status;
1060
1061 /* Exit instantly with error when device is not ready
1062 * to receive scan abort command or it does not perform
1063 * scheduled scan currently */
fb98be5e
DS		 1064 if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1065 (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1066 mvm->scan_status != IWL_MVM_SCAN_OS))
35a000b7
DS		 1067 return -EIO;
1068
1069 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
1070 if (ret)
1071 return ret;
1072
1073 if (status != CAN_ABORT_STATUS) {
1074 /*
1075 * The scan abort will return 1 for success or
1076 * 2 for "failure". A failure condition can be
1077 * due to simply not being in an active scan which
1078 * can occur if we send the scan abort before the
1079 * microcode has notified us that a scan is completed.
1080 */
1081 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
33ea27f6 1082 ret = -ENOENT;
35a000b7
DS		 1083 }
1084
1085 return ret;
1086}
1087
fb98be5e 1088int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
35a000b7
DS		 1089{
1090 int ret;
33ea27f6
AN		 1091 struct iwl_notification_wait wait_scan_done;
1092 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
fb98be5e 1093 bool sched = mvm->scan_status == IWL_MVM_SCAN_SCHED;
35a000b7
DS		 1094
1095 lockdep_assert_held(&mvm->mutex);
1096
d2496221
DS		 1097 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1098 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
1099 notify);
1100
fb98be5e
DS		 1101 if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1102 (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1103 mvm->scan_status != IWL_MVM_SCAN_OS)) {
1104 IWL_DEBUG_SCAN(mvm, "No scan to stop\n");
33ea27f6 1105 return 0;
35a000b7
DS		 1106 }
1107
33ea27f6
AN		 1108 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1109 scan_done_notif,
1110 ARRAY_SIZE(scan_done_notif),
1111 NULL, NULL);
1112
fb98be5e 1113 ret = iwl_mvm_send_scan_offload_abort(mvm);
33ea27f6 1114 if (ret) {
fb98be5e
DS		 1115 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
1116 sched ? "offloaded " : "", ret);
33ea27f6
AN		 1117 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1118 return ret;
1119 }
1120
fb98be5e
DS		 1121 IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
1122 sched ? "offloaded " : "");
33ea27f6
AN		 1123
1124 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1125 if (ret)
1126 return ret;
1127
1128 /*
1129 * Clear the scan status so the next scan requests will succeed. This
1130 * also ensures the Rx handler doesn't do anything, as the scan was
4ff78181
EP		 1131 * stopped from above. Since the rx handler won't do anything now,
1132 * we have to release the scan reference here.
33ea27f6 1133 */
4ff78181
EP		 1134 if (mvm->scan_status == IWL_MVM_SCAN_OS)
1135 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1136
33ea27f6
AN		 1137 mvm->scan_status = IWL_MVM_SCAN_NONE;
1138
fb98be5e
DS		 1139 if (notify) {
1140 if (sched)
1141 ieee80211_sched_scan_stopped(mvm->hw);
1142 else
1143 ieee80211_scan_completed(mvm->hw, true);
1144 }
636a2cdc 1145
33ea27f6 1146 return 0;
35a000b7 1147}
fb98be5e
DS		 1148
1149static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm *mvm,
1150 struct iwl_scan_req_tx_cmd *tx_cmd,
1151 bool no_cck)
1152{
1153 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1154 TX_CMD_FLG_BT_DIS);
1155 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1156 IEEE80211_BAND_2GHZ,
1157 no_cck);
1158 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
1159
1160 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1161 TX_CMD_FLG_BT_DIS);
1162 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1163 IEEE80211_BAND_5GHZ,
1164 no_cck);
1165 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
1166}
1167
1168static void
1169iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
1170 struct ieee80211_channel **channels,
1171 int n_channels, u32 ssid_bitmap,
1172 struct iwl_scan_req_unified_lmac *cmd)
1173{
1174 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
1175 int i;
1176
1177 for (i = 0; i < n_channels; i++) {
1178 channel_cfg[i].channel_num =
1179 cpu_to_le16(channels[i]->hw_value);
1180 channel_cfg[i].iter_count = cpu_to_le16(1);
1181 channel_cfg[i].iter_interval = 0;
1182 channel_cfg[i].flags =
1183 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
1184 ssid_bitmap);
1185 }
1186}
1187
66dc5272
AO		 1188static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
1189 size_t len, u8 *const pos)
1190{
1191 static const u8 before_ds_params[] = {
1192 WLAN_EID_SSID,
1193 WLAN_EID_SUPP_RATES,
1194 WLAN_EID_REQUEST,
1195 WLAN_EID_EXT_SUPP_RATES,
1196 };
1197 size_t offs;
1198 u8 *newpos = pos;
1199
1200 if (!iwl_mvm_rrm_scan_needed(mvm)) {
1201 memcpy(newpos, ies, len);
1202 return newpos + len;
1203 }
1204
1205 offs = ieee80211_ie_split(ies, len,
1206 before_ds_params,
1207 ARRAY_SIZE(before_ds_params),
1208 0);
1209
1210 memcpy(newpos, ies, offs);
1211 newpos += offs;
1212
1213 /* Add a placeholder for DS Parameter Set element */
1214 *newpos++ = WLAN_EID_DS_PARAMS;
1215 *newpos++ = 1;
1216 *newpos++ = 0;
1217
1218 memcpy(newpos, ies + offs, len - offs);
1219 newpos += len - offs;
1220
1221 return newpos;
1222}
1223
fb98be5e
DS		 1224static void
1225iwl_mvm_build_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1226 struct ieee80211_scan_ies *ies,
d2496221 1227 struct iwl_scan_probe_req *preq)
fb98be5e 1228{
fb98be5e 1229 struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
66dc5272 1230 u8 *pos, *newpos;
fb98be5e
DS		 1231
1232 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1233 eth_broadcast_addr(frame->da);
1234 memcpy(frame->sa, vif->addr, ETH_ALEN);
1235 eth_broadcast_addr(frame->bssid);
1236 frame->seq_ctrl = 0;
1237
1238 pos = frame->u.probe_req.variable;
1239 *pos++ = WLAN_EID_SSID;
1240 *pos++ = 0;
1241
1242 preq->mac_header.offset = 0;
1243 preq->mac_header.len = cpu_to_le16(24 + 2);
1244
66dc5272
AO		 1245 /* Insert ds parameter set element on 2.4 GHz band */
1246 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
1247 ies->ies[IEEE80211_BAND_2GHZ],
1248 ies->len[IEEE80211_BAND_2GHZ],
1249 pos);
fb98be5e 1250 preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
66dc5272
AO		 1251 preq->band_data[0].len = cpu_to_le16(newpos - pos);
1252 pos = newpos;
fb98be5e
DS		 1253
1254 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
1255 ies->len[IEEE80211_BAND_5GHZ]);
1256 preq->band_data[1].offset = cpu_to_le16(pos - preq->buf);
1257 preq->band_data[1].len = cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
1258 pos += ies->len[IEEE80211_BAND_5GHZ];
1259
1260 memcpy(pos, ies->common_ies, ies->common_ie_len);
1261 preq->common_data.offset = cpu_to_le16(pos - preq->buf);
1262 preq->common_data.len = cpu_to_le16(ies->common_ie_len);
1263}
1264
1265static void
1266iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
1267 struct iwl_scan_req_unified_lmac *cmd,
1268 struct iwl_mvm_scan_params *params)
1269{
af91344c 1270 memset(cmd, 0, ksize(cmd));
2ce89cd6
DS		 1271 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1272 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1273 if (params->passive_fragmented)
1274 cmd->fragmented_dwell =
1275 params->dwell[IEEE80211_BAND_2GHZ].passive;
fb98be5e
DS		 1276 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
1277 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1278 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1279 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
fb98be5e 1280 cmd->iter_num = cpu_to_le32(1);
af91344c
DS		 1281
1282 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1283 mvm->last_ebs_successful) {
1284 cmd->channel_opt[0].flags =
1285 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1286 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1287 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1288 cmd->channel_opt[1].flags =
1289 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1290 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1291 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1292 }
73897bd1
AO		 1293
1294 if (iwl_mvm_rrm_scan_needed(mvm))
1295 cmd->scan_flags |=
1296 cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
fb98be5e
DS		 1297}
1298
1299int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
1300 struct ieee80211_vif *vif,
1301 struct ieee80211_scan_request *req)
1302{
1303 struct iwl_host_cmd hcmd = {
1304 .id = SCAN_OFFLOAD_REQUEST_CMD,
1305 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1306 sizeof(struct iwl_scan_channel_cfg_lmac) *
1307 mvm->fw->ucode_capa.n_scan_channels +
1308 sizeof(struct iwl_scan_probe_req), },
1309 .data = { mvm->scan_cmd, },
1310 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1311 };
1312 struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
d2496221 1313 struct iwl_scan_probe_req *preq;
fb98be5e
DS		 1314 struct iwl_mvm_scan_params params = {};
1315 u32 flags;
1316 int ssid_bitmap = 0;
1317 int ret, i;
1318
1319 lockdep_assert_held(&mvm->mutex);
1320
1321 /* we should have failed registration if scan_cmd was NULL */
1322 if (WARN_ON(mvm->scan_cmd == NULL))
1323 return -ENOMEM;
1324
48849a41
AO		 1325 if (req->req.n_ssids > PROBE_OPTION_MAX ||
1326 req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] +
1327 req->ies.len[NL80211_BAND_5GHZ] >
1328 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) ||
1329 req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
1330 return -ENOBUFS;
fb98be5e
DS		 1331
1332 mvm->scan_status = IWL_MVM_SCAN_OS;
1333
1334 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1335 &params);
1336
1337 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1338
1339 cmd->n_channels = (u8)req->req.n_channels;
1340
1341 flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1342
1343 if (req->req.n_ssids == 1 && req->req.ssids[0].ssid_len != 0)
1344 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1345
1346 if (params.passive_fragmented)
1347 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1348
1349 if (req->req.n_ssids == 0)
1350 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1351
73897bd1 1352 cmd->scan_flags |= cpu_to_le32(flags);
fb98be5e
DS		 1353
1354 cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band);
1355 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1356 MAC_FILTER_IN_BEACON);
1357 iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, req->req.no_cck);
1358 iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->req.ssids,
1359 req->req.n_ssids, 0);
1360
1361 cmd->schedule[0].delay = 0;
1362 cmd->schedule[0].iterations = 1;
1363 cmd->schedule[0].full_scan_mul = 0;
1364 cmd->schedule[1].delay = 0;
1365 cmd->schedule[1].iterations = 0;
1366 cmd->schedule[1].full_scan_mul = 0;
1367
1368 for (i = 1; i <= req->req.n_ssids; i++)
1369 ssid_bitmap |= BIT(i);
1370
1371 iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels,
1372 req->req.n_channels, ssid_bitmap,
1373 cmd);
1374
d2496221
DS		 1375 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1376 mvm->fw->ucode_capa.n_scan_channels);
1377
1378 iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, preq);
fb98be5e
DS		 1379
1380 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1381 if (!ret) {
1382 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1383 } else {
1384 /*
1385 * If the scan failed, it usually means that the FW was unable
1386 * to allocate the time events. Warn on it, but maybe we
1387 * should try to send the command again with different params.
1388 */
1389 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1390 mvm->scan_status = IWL_MVM_SCAN_NONE;
1391 ret = -EIO;
1392 }
1393 return ret;
1394}
1395
1396int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
1397 struct ieee80211_vif *vif,
1398 struct cfg80211_sched_scan_request *req,
1399 struct ieee80211_scan_ies *ies)
1400{
1401 struct iwl_host_cmd hcmd = {
1402 .id = SCAN_OFFLOAD_REQUEST_CMD,
1403 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1404 sizeof(struct iwl_scan_channel_cfg_lmac) *
1405 mvm->fw->ucode_capa.n_scan_channels +
1406 sizeof(struct iwl_scan_probe_req), },
1407 .data = { mvm->scan_cmd, },
1408 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1409 };
1410 struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
d2496221 1411 struct iwl_scan_probe_req *preq;
fb98be5e
DS		 1412 struct iwl_mvm_scan_params params = {};
1413 int ret;
1414 u32 flags = 0, ssid_bitmap = 0;
1415
1416 lockdep_assert_held(&mvm->mutex);
1417
1418 /* we should have failed registration if scan_cmd was NULL */
1419 if (WARN_ON(mvm->scan_cmd == NULL))
1420 return -ENOMEM;
1421
48849a41
AO		 1422 if (req->n_ssids > PROBE_OPTION_MAX ||
1423 ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1424 ies->len[NL80211_BAND_5GHZ] >
1425 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) ||
1426 req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
fb98be5e
DS		 1427 return -ENOBUFS;
1428
1429 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
1430
1431 iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1432
1433 cmd->n_channels = (u8)req->n_channels;
1434
d2496221 1435 if (iwl_mvm_scan_pass_all(mvm, req))
fb98be5e 1436 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
fb98be5e
DS		 1437
1438 if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0)
1439 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1440
1441 if (params.passive_fragmented)
1442 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1443
1444 if (req->n_ssids == 0)
1445 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1446
73897bd1 1447 cmd->scan_flags |= cpu_to_le32(flags);
fb98be5e
DS		 1448
1449 cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
1450 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1451 MAC_FILTER_IN_BEACON);
1452 iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, false);
1453 iwl_scan_offload_build_ssid(req, cmd->direct_scan, &ssid_bitmap, false);
1454
b14fc2be 1455 cmd->schedule[0].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
fb98be5e
DS		 1456 cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1457 cmd->schedule[0].full_scan_mul = 1;
1458
b14fc2be 1459 cmd->schedule[1].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
fb98be5e
DS		 1460 cmd->schedule[1].iterations = 0xff;
1461 cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1462
1463 iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1464 ssid_bitmap, cmd);
1465
d2496221
DS		 1466 preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1467 mvm->fw->ucode_capa.n_scan_channels);
1468
1469 iwl_mvm_build_unified_scan_probe(mvm, vif, ies, preq);
fb98be5e
DS		 1470
1471 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1472 if (!ret) {
1473 IWL_DEBUG_SCAN(mvm,
1474 "Sched scan request was sent successfully\n");
1475 } else {
1476 /*
1477 * If the scan failed, it usually means that the FW was unable
1478 * to allocate the time events. Warn on it, but maybe we
1479 * should try to send the command again with different params.
1480 */
1481 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1482 mvm->scan_status = IWL_MVM_SCAN_NONE;
1483 ret = -EIO;
1484 }
1485 return ret;
1486}
1487
1488
1489int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
1490{
d2496221
DS		 1491 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1492 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN,
1493 true);
1494
9b520d84
EG		 1495 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1496 return 0;
1497
1498 if (iwl_mvm_is_radio_killed(mvm)) {
1499 ieee80211_scan_completed(mvm->hw, true);
1500 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1501 mvm->scan_status = IWL_MVM_SCAN_NONE;
1502 return 0;
1503 }
1504
fb98be5e
DS		 1505 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1506 return iwl_mvm_scan_offload_stop(mvm, true);
1507 return iwl_mvm_cancel_regular_scan(mvm);
1508}
d2496221
DS		 1509
1510/* UMAC scan API */
1511
1512struct iwl_umac_scan_done {
1513 struct iwl_mvm *mvm;
1514 enum iwl_umac_scan_uid_type type;
1515};
1516
1517static int rate_to_scan_rate_flag(unsigned int rate)
1518{
1519 static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1520 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M,
1521 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M,
1522 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M,
1523 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M,
1524 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M,
1525 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M,
1526 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M,
1527 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M,
1528 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M,
1529 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M,
1530 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M,
1531 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M,
1532 };
1533
1534 return rate_to_scan_rate[rate];
1535}
1536
1537static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1538{
1539 struct ieee80211_supported_band *band;
1540 unsigned int rates = 0;
1541 int i;
1542
1543 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1544 for (i = 0; i < band->n_bitrates; i++)
1545 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1546 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1547 for (i = 0; i < band->n_bitrates; i++)
1548 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1549
1550 /* Set both basic rates and supported rates */
1551 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1552
1553 return cpu_to_le32(rates);
1554}
1555
1556int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1557{
1558
1559 struct iwl_scan_config *scan_config;
1560 struct ieee80211_supported_band *band;
1561 int num_channels =
1562 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
1563 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
1564 int ret, i, j = 0, cmd_size, data_size;
1565 struct iwl_host_cmd cmd = {
1566 .id = SCAN_CFG_CMD,
1567 };
1568
1569 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1570 return -ENOBUFS;
1571
1572 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
1573
1574 scan_config = kzalloc(cmd_size, GFP_KERNEL);
1575 if (!scan_config)
1576 return -ENOMEM;
1577
1578 data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
1579 scan_config->hdr.size = cpu_to_le16(data_size);
1580 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
1581 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1582 SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1583 SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1584 SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1585 SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1586 SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1587 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
1588 SCAN_CONFIG_N_CHANNELS(num_channels));
1589 scan_config->tx_chains = cpu_to_le32(mvm->fw->valid_tx_ant);
1590 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1591 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1592 scan_config->out_of_channel_time = cpu_to_le32(170);
1593 scan_config->suspend_time = cpu_to_le32(30);
1594 scan_config->dwell_active = 20;
1595 scan_config->dwell_passive = 110;
1596 scan_config->dwell_fragmented = 20;
1597
1598 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1599
1600 scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1601 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1602 IWL_CHANNEL_FLAG_ACCURATE_EBS |
1603 IWL_CHANNEL_FLAG_EBS_ADD |
1604 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1605
1606 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1607 for (i = 0; i < band->n_channels; i++, j++)
1608 scan_config->channel_array[j] = band->channels[i].center_freq;
1609 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1610 for (i = 0; i < band->n_channels; i++, j++)
1611 scan_config->channel_array[j] = band->channels[i].center_freq;
1612
1613 cmd.data[0] = scan_config;
1614 cmd.len[0] = cmd_size;
1615 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1616
1617 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1618
1619 ret = iwl_mvm_send_cmd(mvm, &cmd);
1620
1621 kfree(scan_config);
1622 return ret;
1623}
1624
1625static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1626{
1627 int i;
1628
1629 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1630 if (mvm->scan_uid[i] == uid)
1631 return i;
1632
1633 return i;
1634}
1635
1636static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1637{
1638 return iwl_mvm_find_scan_uid(mvm, 0);
1639}
1640
1641static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm,
1642 enum iwl_umac_scan_uid_type type)
1643{
1644 int i;
1645
1646 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1647 if (mvm->scan_uid[i] & type)
1648 return true;
1649
1650 return false;
1651}
1652
1653static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm,
1654 enum iwl_umac_scan_uid_type type)
1655{
1656 u32 uid;
1657
1658 /* make sure exactly one bit is on in scan type */
1659 WARN_ON(hweight8(type) != 1);
1660
1661 /*
1662 * Make sure scan uids are unique. If one scan lasts long time while
1663 * others are completing frequently, the seq number will wrap up and
1664 * we may have more than one scan with the same uid.
1665 */
1666 do {
1667 uid = type | (mvm->scan_seq_num <<
1668 IWL_UMAC_SCAN_UID_SEQ_OFFSET);
1669 mvm->scan_seq_num++;
1670 } while (iwl_mvm_find_scan_uid(mvm, uid) <
1671 IWL_MVM_MAX_SIMULTANEOUS_SCANS);
1672
1673 IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
1674
1675 return uid;
1676}
1677
1678static void
1679iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm *mvm,
1680 struct iwl_scan_req_umac *cmd,
1681 struct iwl_mvm_scan_params *params)
1682{
1683 memset(cmd, 0, ksize(cmd));
1684 cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1685 sizeof(struct iwl_mvm_umac_cmd_hdr));
1686 cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1687 cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1688 if (params->passive_fragmented)
1689 cmd->fragmented_dwell =
1690 params->dwell[IEEE80211_BAND_2GHZ].passive;
1691 cmd->max_out_time = cpu_to_le32(params->max_out_time);
1692 cmd->suspend_time = cpu_to_le32(params->suspend_time);
1693 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1694}
1695
1696static void
1697iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1698 struct ieee80211_channel **channels,
1699 int n_channels, u32 ssid_bitmap,
1700 struct iwl_scan_req_umac *cmd)
1701{
1702 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1703 int i;
1704
1705 for (i = 0; i < n_channels; i++) {
1706 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1707 channel_cfg[i].channel_num = channels[i]->hw_value;
1708 channel_cfg[i].iter_count = 1;
1709 channel_cfg[i].iter_interval = 0;
1710 }
1711}
1712
1713static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids,
1714 struct cfg80211_ssid *ssids,
1715 int fragmented)
1716{
1717 int flags = 0;
1718
1719 if (n_ssids == 0)
1720 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1721
1722 if (n_ssids == 1 && ssids[0].ssid_len != 0)
1723 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1724
1725 if (fragmented)
1726 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1727
1728 if (iwl_mvm_rrm_scan_needed(mvm))
1729 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1730
1731 return flags;
1732}
1733
1734int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1735 struct ieee80211_scan_request *req)
1736{
1737 struct iwl_host_cmd hcmd = {
1738 .id = SCAN_REQ_UMAC,
1739 .len = { iwl_mvm_scan_size(mvm), },
1740 .data = { mvm->scan_cmd, },
1741 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1742 };
1743 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1744 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1745 sizeof(struct iwl_scan_channel_cfg_umac) *
1746 mvm->fw->ucode_capa.n_scan_channels;
1747 struct iwl_mvm_scan_params params = {};
1748 u32 uid, flags;
1749 int ssid_bitmap = 0;
1750 int ret, i, uid_idx;
1751
1752 lockdep_assert_held(&mvm->mutex);
1753
1754 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1755 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1756 return -EBUSY;
1757
1758 /* we should have failed registration if scan_cmd was NULL */
1759 if (WARN_ON(mvm->scan_cmd == NULL))
1760 return -ENOMEM;
1761
1762 if (WARN_ON(req->req.n_ssids > PROBE_OPTION_MAX ||
1763 req->ies.common_ie_len +
1764 req->ies.len[NL80211_BAND_2GHZ] +
1765 req->ies.len[NL80211_BAND_5GHZ] + 24 + 2 >
1766 SCAN_OFFLOAD_PROBE_REQ_SIZE || req->req.n_channels >
1767 mvm->fw->ucode_capa.n_scan_channels))
1768 return -ENOBUFS;
1769
1770 iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1771 &params);
1772
1773 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1774
1775 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1776 mvm->scan_uid[uid_idx] = uid;
1777 cmd->uid = cpu_to_le32(uid);
1778
1779 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1780
1781 flags = iwl_mvm_scan_umac_common_flags(mvm, req->req.n_ssids,
1782 req->req.ssids,
1783 params.passive_fragmented);
1784
1785 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1786
1787 cmd->general_flags = cpu_to_le32(flags);
1788 cmd->n_channels = req->req.n_channels;
1789
1790 for (i = 0; i < req->req.n_ssids; i++)
1791 ssid_bitmap |= BIT(i);
1792
1793 iwl_mvm_umac_scan_cfg_channels(mvm, req->req.channels,
1794 req->req.n_channels, ssid_bitmap, cmd);
1795
1796 sec_part->schedule[0].iter_count = 1;
1797 sec_part->delay = 0;
1798
1799 iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, &sec_part->preq);
1800
1801 iwl_mvm_scan_fill_ssids(sec_part->direct_scan, req->req.ssids,
1802 req->req.n_ssids, 0);
1803
1804 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1805 if (!ret) {
1806 IWL_DEBUG_SCAN(mvm,
1807 "Scan request was sent successfully\n");
1808 } else {
1809 /*
1810 * If the scan failed, it usually means that the FW was unable
1811 * to allocate the time events. Warn on it, but maybe we
1812 * should try to send the command again with different params.
1813 */
1814 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1815 }
1816 return ret;
1817}
1818
1819int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1820 struct cfg80211_sched_scan_request *req,
1821 struct ieee80211_scan_ies *ies)
1822{
1823
1824 struct iwl_host_cmd hcmd = {
1825 .id = SCAN_REQ_UMAC,
1826 .len = { iwl_mvm_scan_size(mvm), },
1827 .data = { mvm->scan_cmd, },
1828 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1829 };
1830 struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1831 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1832 sizeof(struct iwl_scan_channel_cfg_umac) *
1833 mvm->fw->ucode_capa.n_scan_channels;
1834 struct iwl_mvm_scan_params params = {};
1835 u32 uid, flags;
1836 int ssid_bitmap = 0;
1837 int ret, uid_idx;
1838
1839 lockdep_assert_held(&mvm->mutex);
1840
1841 uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1842 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1843 return -EBUSY;
1844
1845 /* we should have failed registration if scan_cmd was NULL */
1846 if (WARN_ON(mvm->scan_cmd == NULL))
1847 return -ENOMEM;
1848
1849 if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX ||
1850 ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1851 ies->len[NL80211_BAND_5GHZ] + 24 + 2 >
1852 SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels >
1853 mvm->fw->ucode_capa.n_scan_channels))
1854 return -ENOBUFS;
1855
1856 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags,
1857 &params);
1858
1859 iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1860
1861 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1862
1863 uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN);
1864 mvm->scan_uid[uid_idx] = uid;
1865 cmd->uid = cpu_to_le32(uid);
1866
1867 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1868
1869 flags = iwl_mvm_scan_umac_common_flags(mvm, req->n_ssids, req->ssids,
1870 params.passive_fragmented);
1871
1872 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1873
1874 if (iwl_mvm_scan_pass_all(mvm, req))
1875 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1876 else
1877 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1878
1879 cmd->general_flags = cpu_to_le32(flags);
1880
1881 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1882 mvm->last_ebs_successful)
1883 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1884 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1885 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1886
1887 cmd->n_channels = req->n_channels;
1888
1889 iwl_scan_offload_build_ssid(req, sec_part->direct_scan, &ssid_bitmap,
1890 false);
1891
1892 /* This API uses bits 0-19 instead of 1-20. */
1893 ssid_bitmap = ssid_bitmap >> 1;
1894
1895 iwl_mvm_umac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1896 ssid_bitmap, cmd);
1897
1898 sec_part->schedule[0].interval =
1899 cpu_to_le16(req->interval / MSEC_PER_SEC);
1900 sec_part->schedule[0].iter_count = 0xff;
1901
1902 sec_part->delay = 0;
1903
1904 iwl_mvm_build_unified_scan_probe(mvm, vif, ies, &sec_part->preq);
1905
1906 ret = iwl_mvm_send_cmd(mvm, &hcmd);
1907 if (!ret) {
1908 IWL_DEBUG_SCAN(mvm,
1909 "Sched scan request was sent successfully\n");
1910 } else {
1911 /*
1912 * If the scan failed, it usually means that the FW was unable
1913 * to allocate the time events. Warn on it, but maybe we
1914 * should try to send the command again with different params.
1915 */
1916 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1917 }
1918 return ret;
1919}
1920
1921int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1922 struct iwl_rx_cmd_buffer *rxb,
1923 struct iwl_device_cmd *cmd)
1924{
1925 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1926 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1927 u32 uid = __le32_to_cpu(notif->uid);
1928 bool sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN);
1929 int uid_idx = iwl_mvm_find_scan_uid(mvm, uid);
1930
1931 if (WARN(uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS,
1932 "Scan notification for uknown scan ID\n"))
1933 return 0;
1934
1935 IWL_DEBUG_SCAN(mvm,
1936 "Scan completed, uid %u type %s, status %s, EBS status %s\n",
1937 uid, sched ? "sched" : "regular",
1938 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1939 "completed" : "aborted",
1940 notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
1941 "success" : "failed");
1942
1943 mvm->last_ebs_successful = !notif->ebs_status;
1944 mvm->scan_uid[uid_idx] = 0;
1945
1946 if (!sched) {
1947 ieee80211_scan_completed(mvm->hw,
1948 notif->status ==
1949 IWL_SCAN_OFFLOAD_ABORTED);
1950 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1951 } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) {
1952 ieee80211_sched_scan_stopped(mvm->hw);
1953 } else {
1954 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
1955 }
1956
1957 return 0;
1958}
1959
1960static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
1961 struct iwl_rx_packet *pkt, void *data)
1962{
1963 struct iwl_umac_scan_done *scan_done = data;
1964 struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1965 u32 uid = __le32_to_cpu(notif->uid);
1966 int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid);
1967
1968 if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
1969 return false;
1970
1971 if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1972 return false;
1973
1974 /*
1975 * Clear scan uid of scans that was aborted from above and completed
1976 * in FW so the RX handler does nothing.
1977 */
1978 scan_done->mvm->scan_uid[uid_idx] = 0;
1979
1980 return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
1981}
1982
1983static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
1984{
1985 struct iwl_umac_scan_abort cmd = {
1986 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
1987 sizeof(struct iwl_mvm_umac_cmd_hdr)),
1988 .uid = cpu_to_le32(uid),
1989 };
1990
1991 lockdep_assert_held(&mvm->mutex);
1992
1993 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1994
1995 return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
1996}
1997
1998static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
1999 enum iwl_umac_scan_uid_type type, bool notify)
2000{
2001 struct iwl_notification_wait wait_scan_done;
2002 static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, };
2003 struct iwl_umac_scan_done scan_done = {
2004 .mvm = mvm,
2005 .type = type,
2006 };
2007 int i, ret = -EIO;
2008
2009 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
2010 scan_done_notif,
2011 ARRAY_SIZE(scan_done_notif),
2012 iwl_scan_umac_done_check, &scan_done);
2013
2014 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
2015
2016 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) {
2017 if (mvm->scan_uid[i] & type) {
2018 int err;
2019
2020 if (iwl_mvm_is_radio_killed(mvm) &&
2021 (type & IWL_UMAC_SCAN_UID_REG_SCAN)) {
2022 ieee80211_scan_completed(mvm->hw, true);
2023 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2024 break;
2025 }
2026
2027 err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
2028 if (!err)
2029 ret = 0;
2030 }
2031 }
2032
2033 if (ret) {
2034 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
2035 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
2036 return ret;
2037 }
2038
2039 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
2040 if (ret)
2041 return ret;
2042
2043 if (notify) {
2044 if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN)
2045 ieee80211_sched_scan_stopped(mvm->hw);
2046 if (type & IWL_UMAC_SCAN_UID_REG_SCAN) {
2047 ieee80211_scan_completed(mvm->hw, true);
2048 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2049 }
2050 }
2051
2052 return ret;
2053}
2054
2055int iwl_mvm_scan_size(struct iwl_mvm *mvm)
2056{
2057 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2058 return sizeof(struct iwl_scan_req_umac) +
2059 sizeof(struct iwl_scan_channel_cfg_umac) *
2060 mvm->fw->ucode_capa.n_scan_channels +
2061 sizeof(struct iwl_scan_req_umac_tail);
2062
2063 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2064 return sizeof(struct iwl_scan_req_unified_lmac) +
2065 sizeof(struct iwl_scan_channel_cfg_lmac) *
2066 mvm->fw->ucode_capa.n_scan_channels +
2067 sizeof(struct iwl_scan_probe_req);
2068
2069 return sizeof(struct iwl_scan_cmd) +
2070 mvm->fw->ucode_capa.max_probe_length +
2071 mvm->fw->ucode_capa.n_scan_channels *
2072 sizeof(struct iwl_scan_channel);
2073}
Linux kernel - Deliverables
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