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 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 68 #include <linux/etherdevice.h> 69 #include <net/mac80211.h> 70 71 #include "mvm.h" 72 #include "fw-api-scan.h" 73 #include "iwl-io.h" 74 75 #define IWL_DENSE_EBS_SCAN_RATIO 5 76 #define IWL_SPARSE_EBS_SCAN_RATIO 1 77 78 enum iwl_mvm_traffic_load { 79 IWL_MVM_TRAFFIC_LOW, 80 IWL_MVM_TRAFFIC_MEDIUM, 81 IWL_MVM_TRAFFIC_HIGH, 82 }; 83 84 struct iwl_mvm_scan_timing_params { 85 u32 dwell_active; 86 u32 dwell_passive; 87 u32 dwell_fragmented; 88 u32 dwell_extended; 89 u32 suspend_time; 90 u32 max_out_time; 91 }; 92 93 static struct iwl_mvm_scan_timing_params scan_timing[] = { 94 [IWL_SCAN_TYPE_UNASSOC] = { 95 .dwell_active = 10, 96 .dwell_passive = 110, 97 .dwell_fragmented = 44, 98 .dwell_extended = 90, 99 .suspend_time = 0, 100 .max_out_time = 0, 101 }, 102 [IWL_SCAN_TYPE_WILD] = { 103 .dwell_active = 10, 104 .dwell_passive = 110, 105 .dwell_fragmented = 44, 106 .dwell_extended = 90, 107 .suspend_time = 30, 108 .max_out_time = 120, 109 }, 110 [IWL_SCAN_TYPE_MILD] = { 111 .dwell_active = 10, 112 .dwell_passive = 110, 113 .dwell_fragmented = 44, 114 .dwell_extended = 90, 115 .suspend_time = 120, 116 .max_out_time = 120, 117 }, 118 [IWL_SCAN_TYPE_FRAGMENTED] = { 119 .dwell_active = 10, 120 .dwell_passive = 110, 121 .dwell_fragmented = 44, 122 .suspend_time = 95, 123 .max_out_time = 44, 124 }, 125 }; 126 127 struct iwl_mvm_scan_params { 128 enum iwl_mvm_scan_type type; 129 u32 n_channels; 130 u16 delay; 131 int n_ssids; 132 struct cfg80211_ssid *ssids; 133 struct ieee80211_channel **channels; 134 u32 flags; 135 u8 *mac_addr; 136 u8 *mac_addr_mask; 137 bool no_cck; 138 bool pass_all; 139 int n_match_sets; 140 struct iwl_scan_probe_req preq; 141 struct cfg80211_match_set *match_sets; 142 int n_scan_plans; 143 struct cfg80211_sched_scan_plan *scan_plans; 144 }; 145 146 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 147 { 148 if (mvm->scan_rx_ant != ANT_NONE) 149 return mvm->scan_rx_ant; 150 return iwl_mvm_get_valid_rx_ant(mvm); 151 } 152 153 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 154 { 155 u16 rx_chain; 156 u8 rx_ant; 157 158 rx_ant = iwl_mvm_scan_rx_ant(mvm); 159 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 160 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 161 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 162 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 163 return cpu_to_le16(rx_chain); 164 } 165 166 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band) 167 { 168 if (band == NL80211_BAND_2GHZ) 169 return cpu_to_le32(PHY_BAND_24); 170 else 171 return cpu_to_le32(PHY_BAND_5); 172 } 173 174 static inline __le32 175 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, 176 bool no_cck) 177 { 178 u32 tx_ant; 179 180 mvm->scan_last_antenna_idx = 181 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 182 mvm->scan_last_antenna_idx); 183 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 184 185 if (band == NL80211_BAND_2GHZ && !no_cck) 186 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 187 tx_ant); 188 else 189 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 190 } 191 192 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 193 struct ieee80211_vif *vif) 194 { 195 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 196 int *global_cnt = data; 197 198 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 199 mvmvif->phy_ctxt->id < MAX_PHYS) 200 *global_cnt += 1; 201 } 202 203 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 204 { 205 return IWL_MVM_TRAFFIC_LOW; 206 } 207 208 static enum 209 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device) 210 { 211 int global_cnt = 0; 212 enum iwl_mvm_traffic_load load; 213 bool low_latency; 214 215 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 216 IEEE80211_IFACE_ITER_NORMAL, 217 iwl_mvm_scan_condition_iterator, 218 &global_cnt); 219 if (!global_cnt) 220 return IWL_SCAN_TYPE_UNASSOC; 221 222 load = iwl_mvm_get_traffic_load(mvm); 223 low_latency = iwl_mvm_low_latency(mvm); 224 225 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device && 226 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) 227 return IWL_SCAN_TYPE_FRAGMENTED; 228 229 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 230 return IWL_SCAN_TYPE_MILD; 231 232 return IWL_SCAN_TYPE_WILD; 233 } 234 235 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 236 { 237 /* require rrm scan whenever the fw supports it */ 238 return fw_has_capa(&mvm->fw->ucode_capa, 239 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 240 } 241 242 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 243 { 244 int max_probe_len; 245 246 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 247 248 /* we create the 802.11 header and SSID element */ 249 max_probe_len -= 24 + 2; 250 251 /* DS parameter set element is added on 2.4GHZ band if required */ 252 if (iwl_mvm_rrm_scan_needed(mvm)) 253 max_probe_len -= 3; 254 255 return max_probe_len; 256 } 257 258 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 259 { 260 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 261 262 /* TODO: [BUG] This function should return the maximum allowed size of 263 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 264 * in the same command. So the correct implementation of this function 265 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 266 * command has only 512 bytes and it would leave us with about 240 267 * bytes for scan IEs, which is clearly not enough. So meanwhile 268 * we will report an incorrect value. This may result in a failure to 269 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 270 * functions with -ENOBUFS, if a large enough probe will be provided. 271 */ 272 return max_ie_len; 273 } 274 275 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res, 276 int num_res, u8 *buf, size_t buf_size) 277 { 278 int i; 279 u8 *pos = buf, *end = buf + buf_size; 280 281 for (i = 0; pos < end && i < num_res; i++) 282 pos += snprintf(pos, end - pos, " %u", res[i].channel); 283 284 /* terminate the string in case the buffer was too short */ 285 *(buf + buf_size - 1) = '\0'; 286 287 return buf; 288 } 289 290 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 291 struct iwl_rx_cmd_buffer *rxb) 292 { 293 struct iwl_rx_packet *pkt = rxb_addr(rxb); 294 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 295 u8 buf[256]; 296 297 IWL_DEBUG_SCAN(mvm, 298 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n", 299 notif->status, notif->scanned_channels, 300 iwl_mvm_dump_channel_list(notif->results, 301 notif->scanned_channels, buf, 302 sizeof(buf))); 303 304 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 305 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 306 ieee80211_sched_scan_results(mvm->hw); 307 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 308 } 309 } 310 311 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 312 struct iwl_rx_cmd_buffer *rxb) 313 { 314 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 315 ieee80211_sched_scan_results(mvm->hw); 316 } 317 318 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 319 { 320 switch (status) { 321 case IWL_SCAN_EBS_SUCCESS: 322 return "successful"; 323 case IWL_SCAN_EBS_INACTIVE: 324 return "inactive"; 325 case IWL_SCAN_EBS_FAILED: 326 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 327 default: 328 return "failed"; 329 } 330 } 331 332 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 333 struct iwl_rx_cmd_buffer *rxb) 334 { 335 struct iwl_rx_packet *pkt = rxb_addr(rxb); 336 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 337 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 338 339 /* If this happens, the firmware has mistakenly sent an LMAC 340 * notification during UMAC scans -- warn and ignore it. 341 */ 342 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 343 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 344 return; 345 346 /* scan status must be locked for proper checking */ 347 lockdep_assert_held(&mvm->mutex); 348 349 /* We first check if we were stopping a scan, in which case we 350 * just clear the stopping flag. Then we check if it was a 351 * firmware initiated stop, in which case we need to inform 352 * mac80211. 353 * Note that we can have a stopping and a running scan 354 * simultaneously, but we can't have two different types of 355 * scans stopping or running at the same time (since LMAC 356 * doesn't support it). 357 */ 358 359 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 360 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 361 362 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 363 aborted ? "aborted" : "completed", 364 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 365 IWL_DEBUG_SCAN(mvm, 366 "Last line %d, Last iteration %d, Time after last iteration %d\n", 367 scan_notif->last_schedule_line, 368 scan_notif->last_schedule_iteration, 369 __le32_to_cpu(scan_notif->time_after_last_iter)); 370 371 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 372 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 373 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 374 aborted ? "aborted" : "completed", 375 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 376 377 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 378 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 379 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 380 381 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 382 aborted ? "aborted" : "completed", 383 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 384 IWL_DEBUG_SCAN(mvm, 385 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 386 scan_notif->last_schedule_line, 387 scan_notif->last_schedule_iteration, 388 __le32_to_cpu(scan_notif->time_after_last_iter)); 389 390 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 391 ieee80211_sched_scan_stopped(mvm->hw); 392 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 393 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 394 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 395 aborted ? "aborted" : "completed", 396 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 397 398 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 399 ieee80211_scan_completed(mvm->hw, 400 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 401 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 402 del_timer(&mvm->scan_timer); 403 } else { 404 IWL_ERR(mvm, 405 "got scan complete notification but no scan is running\n"); 406 } 407 408 mvm->last_ebs_successful = 409 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 410 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 411 } 412 413 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 414 { 415 int i; 416 417 for (i = 0; i < PROBE_OPTION_MAX; i++) { 418 if (!ssid_list[i].len) 419 break; 420 if (ssid_list[i].len == ssid_len && 421 !memcmp(ssid_list->ssid, ssid, ssid_len)) 422 return i; 423 } 424 return -1; 425 } 426 427 /* We insert the SSIDs in an inverted order, because the FW will 428 * invert it back. 429 */ 430 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 431 struct iwl_ssid_ie *ssids, 432 u32 *ssid_bitmap) 433 { 434 int i, j; 435 int index; 436 437 /* 438 * copy SSIDs from match list. 439 * iwl_config_sched_scan_profiles() uses the order of these ssids to 440 * config match list. 441 */ 442 for (i = 0, j = params->n_match_sets - 1; 443 j >= 0 && i < PROBE_OPTION_MAX; 444 i++, j--) { 445 /* skip empty SSID matchsets */ 446 if (!params->match_sets[j].ssid.ssid_len) 447 continue; 448 ssids[i].id = WLAN_EID_SSID; 449 ssids[i].len = params->match_sets[j].ssid.ssid_len; 450 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 451 ssids[i].len); 452 } 453 454 /* add SSIDs from scan SSID list */ 455 *ssid_bitmap = 0; 456 for (j = params->n_ssids - 1; 457 j >= 0 && i < PROBE_OPTION_MAX; 458 i++, j--) { 459 index = iwl_ssid_exist(params->ssids[j].ssid, 460 params->ssids[j].ssid_len, 461 ssids); 462 if (index < 0) { 463 ssids[i].id = WLAN_EID_SSID; 464 ssids[i].len = params->ssids[j].ssid_len; 465 memcpy(ssids[i].ssid, params->ssids[j].ssid, 466 ssids[i].len); 467 *ssid_bitmap |= BIT(i); 468 } else { 469 *ssid_bitmap |= BIT(index); 470 } 471 } 472 } 473 474 static int 475 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 476 struct cfg80211_sched_scan_request *req) 477 { 478 struct iwl_scan_offload_profile *profile; 479 struct iwl_scan_offload_profile_cfg *profile_cfg; 480 struct iwl_scan_offload_blacklist *blacklist; 481 struct iwl_host_cmd cmd = { 482 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 483 .len[1] = sizeof(*profile_cfg), 484 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 485 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 486 }; 487 int blacklist_len; 488 int i; 489 int ret; 490 491 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 492 return -EIO; 493 494 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 495 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 496 else 497 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 498 499 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); 500 if (!blacklist) 501 return -ENOMEM; 502 503 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 504 if (!profile_cfg) { 505 ret = -ENOMEM; 506 goto free_blacklist; 507 } 508 509 cmd.data[0] = blacklist; 510 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 511 cmd.data[1] = profile_cfg; 512 513 /* No blacklist configuration */ 514 515 profile_cfg->num_profiles = req->n_match_sets; 516 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 517 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 518 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 519 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 520 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 521 522 for (i = 0; i < req->n_match_sets; i++) { 523 profile = &profile_cfg->profiles[i]; 524 profile->ssid_index = i; 525 /* Support any cipher and auth algorithm */ 526 profile->unicast_cipher = 0xff; 527 profile->auth_alg = 0xff; 528 profile->network_type = IWL_NETWORK_TYPE_ANY; 529 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 530 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 531 } 532 533 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 534 535 ret = iwl_mvm_send_cmd(mvm, &cmd); 536 kfree(profile_cfg); 537 free_blacklist: 538 kfree(blacklist); 539 540 return ret; 541 } 542 543 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 544 struct cfg80211_sched_scan_request *req) 545 { 546 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 547 IWL_DEBUG_SCAN(mvm, 548 "Sending scheduled scan with filtering, n_match_sets %d\n", 549 req->n_match_sets); 550 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 551 return false; 552 } 553 554 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 555 556 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 557 return true; 558 } 559 560 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 561 { 562 int ret; 563 struct iwl_host_cmd cmd = { 564 .id = SCAN_OFFLOAD_ABORT_CMD, 565 }; 566 u32 status; 567 568 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 569 if (ret) 570 return ret; 571 572 if (status != CAN_ABORT_STATUS) { 573 /* 574 * The scan abort will return 1 for success or 575 * 2 for "failure". A failure condition can be 576 * due to simply not being in an active scan which 577 * can occur if we send the scan abort before the 578 * microcode has notified us that a scan is completed. 579 */ 580 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 581 ret = -ENOENT; 582 } 583 584 return ret; 585 } 586 587 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 588 struct iwl_scan_req_tx_cmd *tx_cmd, 589 bool no_cck) 590 { 591 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 592 TX_CMD_FLG_BT_DIS); 593 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 594 NL80211_BAND_2GHZ, 595 no_cck); 596 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 597 598 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 599 TX_CMD_FLG_BT_DIS); 600 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 601 NL80211_BAND_5GHZ, 602 no_cck); 603 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 604 } 605 606 static void 607 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 608 struct ieee80211_channel **channels, 609 int n_channels, u32 ssid_bitmap, 610 struct iwl_scan_req_lmac *cmd) 611 { 612 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 613 int i; 614 615 for (i = 0; i < n_channels; i++) { 616 channel_cfg[i].channel_num = 617 cpu_to_le16(channels[i]->hw_value); 618 channel_cfg[i].iter_count = cpu_to_le16(1); 619 channel_cfg[i].iter_interval = 0; 620 channel_cfg[i].flags = 621 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 622 ssid_bitmap); 623 } 624 } 625 626 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 627 size_t len, u8 *const pos) 628 { 629 static const u8 before_ds_params[] = { 630 WLAN_EID_SSID, 631 WLAN_EID_SUPP_RATES, 632 WLAN_EID_REQUEST, 633 WLAN_EID_EXT_SUPP_RATES, 634 }; 635 size_t offs; 636 u8 *newpos = pos; 637 638 if (!iwl_mvm_rrm_scan_needed(mvm)) { 639 memcpy(newpos, ies, len); 640 return newpos + len; 641 } 642 643 offs = ieee80211_ie_split(ies, len, 644 before_ds_params, 645 ARRAY_SIZE(before_ds_params), 646 0); 647 648 memcpy(newpos, ies, offs); 649 newpos += offs; 650 651 /* Add a placeholder for DS Parameter Set element */ 652 *newpos++ = WLAN_EID_DS_PARAMS; 653 *newpos++ = 1; 654 *newpos++ = 0; 655 656 memcpy(newpos, ies + offs, len - offs); 657 newpos += len - offs; 658 659 return newpos; 660 } 661 662 static void 663 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 664 struct ieee80211_scan_ies *ies, 665 struct iwl_mvm_scan_params *params) 666 { 667 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 668 u8 *pos, *newpos; 669 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 670 params->mac_addr : NULL; 671 672 /* 673 * Unfortunately, right now the offload scan doesn't support randomising 674 * within the firmware, so until the firmware API is ready we implement 675 * it in the driver. This means that the scan iterations won't really be 676 * random, only when it's restarted, but at least that helps a bit. 677 */ 678 if (mac_addr) 679 get_random_mask_addr(frame->sa, mac_addr, 680 params->mac_addr_mask); 681 else 682 memcpy(frame->sa, vif->addr, ETH_ALEN); 683 684 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 685 eth_broadcast_addr(frame->da); 686 eth_broadcast_addr(frame->bssid); 687 frame->seq_ctrl = 0; 688 689 pos = frame->u.probe_req.variable; 690 *pos++ = WLAN_EID_SSID; 691 *pos++ = 0; 692 693 params->preq.mac_header.offset = 0; 694 params->preq.mac_header.len = cpu_to_le16(24 + 2); 695 696 /* Insert ds parameter set element on 2.4 GHz band */ 697 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 698 ies->ies[NL80211_BAND_2GHZ], 699 ies->len[NL80211_BAND_2GHZ], 700 pos); 701 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 702 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 703 pos = newpos; 704 705 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 706 ies->len[NL80211_BAND_5GHZ]); 707 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 708 params->preq.band_data[1].len = 709 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 710 pos += ies->len[NL80211_BAND_5GHZ]; 711 712 memcpy(pos, ies->common_ies, ies->common_ie_len); 713 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 714 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 715 } 716 717 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm, 718 enum iwl_scan_priority_ext prio) 719 { 720 if (fw_has_api(&mvm->fw->ucode_capa, 721 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY)) 722 return cpu_to_le32(prio); 723 724 if (prio <= IWL_SCAN_PRIORITY_EXT_2) 725 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW); 726 727 if (prio <= IWL_SCAN_PRIORITY_EXT_4) 728 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM); 729 730 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); 731 } 732 733 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 734 struct iwl_scan_req_lmac *cmd, 735 struct iwl_mvm_scan_params *params) 736 { 737 cmd->active_dwell = scan_timing[params->type].dwell_active; 738 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 739 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 740 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 741 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 742 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 743 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 744 } 745 746 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 747 struct ieee80211_scan_ies *ies, 748 int n_channels) 749 { 750 return ((n_ssids <= PROBE_OPTION_MAX) && 751 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 752 (ies->common_ie_len + 753 ies->len[NL80211_BAND_2GHZ] + 754 ies->len[NL80211_BAND_5GHZ] <= 755 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 756 } 757 758 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 759 struct ieee80211_vif *vif) 760 { 761 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 762 763 /* We can only use EBS if: 764 * 1. the feature is supported; 765 * 2. the last EBS was successful; 766 * 3. if only single scan, the single scan EBS API is supported; 767 * 4. it's not a p2p find operation. 768 */ 769 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 770 mvm->last_ebs_successful && 771 vif->type != NL80211_IFTYPE_P2P_DEVICE); 772 } 773 774 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 775 { 776 return params->n_scan_plans == 1 && 777 params->scan_plans[0].iterations == 1; 778 } 779 780 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 781 struct iwl_mvm_scan_params *params, 782 struct ieee80211_vif *vif) 783 { 784 int flags = 0; 785 786 if (params->n_ssids == 0) 787 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 788 789 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 790 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 791 792 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 793 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 794 795 if (iwl_mvm_rrm_scan_needed(mvm)) 796 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 797 798 if (params->pass_all) 799 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 800 else 801 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 802 803 #ifdef CONFIG_IWLWIFI_DEBUGFS 804 if (mvm->scan_iter_notif_enabled) 805 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 806 #endif 807 808 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 809 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 810 811 if (iwl_mvm_is_regular_scan(params) && 812 vif->type != NL80211_IFTYPE_P2P_DEVICE && 813 params->type != IWL_SCAN_TYPE_FRAGMENTED) 814 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 815 816 return flags; 817 } 818 819 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 820 struct iwl_mvm_scan_params *params) 821 { 822 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 823 struct iwl_scan_probe_req *preq = 824 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 825 mvm->fw->ucode_capa.n_scan_channels); 826 u32 ssid_bitmap = 0; 827 int i; 828 829 lockdep_assert_held(&mvm->mutex); 830 831 memset(cmd, 0, ksize(cmd)); 832 833 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 834 return -EINVAL; 835 836 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 837 838 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 839 cmd->iter_num = cpu_to_le32(1); 840 cmd->n_channels = (u8)params->n_channels; 841 842 cmd->delay = cpu_to_le32(params->delay); 843 844 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 845 vif)); 846 847 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 848 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 849 MAC_FILTER_IN_BEACON); 850 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 851 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 852 853 /* this API uses bits 1-20 instead of 0-19 */ 854 ssid_bitmap <<= 1; 855 856 for (i = 0; i < params->n_scan_plans; i++) { 857 struct cfg80211_sched_scan_plan *scan_plan = 858 ¶ms->scan_plans[i]; 859 860 cmd->schedule[i].delay = 861 cpu_to_le16(scan_plan->interval); 862 cmd->schedule[i].iterations = scan_plan->iterations; 863 cmd->schedule[i].full_scan_mul = 1; 864 } 865 866 /* 867 * If the number of iterations of the last scan plan is set to 868 * zero, it should run infinitely. However, this is not always the case. 869 * For example, when regular scan is requested the driver sets one scan 870 * plan with one iteration. 871 */ 872 if (!cmd->schedule[i - 1].iterations) 873 cmd->schedule[i - 1].iterations = 0xff; 874 875 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 876 cmd->channel_opt[0].flags = 877 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 878 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 879 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 880 cmd->channel_opt[0].non_ebs_ratio = 881 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 882 cmd->channel_opt[1].flags = 883 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 884 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 885 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 886 cmd->channel_opt[1].non_ebs_ratio = 887 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 888 } 889 890 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 891 params->n_channels, ssid_bitmap, cmd); 892 893 *preq = params->preq; 894 895 return 0; 896 } 897 898 static int rate_to_scan_rate_flag(unsigned int rate) 899 { 900 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 901 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 902 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 903 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 904 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 905 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 906 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 907 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 908 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 909 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 910 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 911 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 912 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 913 }; 914 915 return rate_to_scan_rate[rate]; 916 } 917 918 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 919 { 920 struct ieee80211_supported_band *band; 921 unsigned int rates = 0; 922 int i; 923 924 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 925 for (i = 0; i < band->n_bitrates; i++) 926 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 927 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 928 for (i = 0; i < band->n_bitrates; i++) 929 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 930 931 /* Set both basic rates and supported rates */ 932 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 933 934 return cpu_to_le32(rates); 935 } 936 937 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 938 { 939 struct iwl_scan_config *scan_config; 940 struct ieee80211_supported_band *band; 941 int num_channels = 942 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 943 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 944 int ret, i, j = 0, cmd_size; 945 struct iwl_host_cmd cmd = { 946 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 947 }; 948 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 949 950 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 951 return -ENOBUFS; 952 953 if (type == mvm->scan_type) { 954 IWL_DEBUG_SCAN(mvm, 955 "Ignoring UMAC scan config of the same type\n"); 956 return 0; 957 } 958 959 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels; 960 961 scan_config = kzalloc(cmd_size, GFP_KERNEL); 962 if (!scan_config) 963 return -ENOMEM; 964 965 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE | 966 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 967 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 968 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 969 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 970 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 971 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 972 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 973 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| 974 SCAN_CONFIG_N_CHANNELS(num_channels) | 975 (type == IWL_SCAN_TYPE_FRAGMENTED ? 976 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 977 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED)); 978 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 979 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 980 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm); 981 scan_config->out_of_channel_time = 982 cpu_to_le32(scan_timing[type].max_out_time); 983 scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 984 scan_config->dwell_active = scan_timing[type].dwell_active; 985 scan_config->dwell_passive = scan_timing[type].dwell_passive; 986 scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented; 987 scan_config->dwell_extended = scan_timing[type].dwell_extended; 988 989 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 990 991 scan_config->bcast_sta_id = mvm->aux_sta.sta_id; 992 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS | 993 IWL_CHANNEL_FLAG_ACCURATE_EBS | 994 IWL_CHANNEL_FLAG_EBS_ADD | 995 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 996 997 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 998 for (i = 0; i < band->n_channels; i++, j++) 999 scan_config->channel_array[j] = band->channels[i].hw_value; 1000 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1001 for (i = 0; i < band->n_channels; i++, j++) 1002 scan_config->channel_array[j] = band->channels[i].hw_value; 1003 1004 cmd.data[0] = scan_config; 1005 cmd.len[0] = cmd_size; 1006 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1007 1008 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1009 1010 ret = iwl_mvm_send_cmd(mvm, &cmd); 1011 if (!ret) 1012 mvm->scan_type = type; 1013 1014 kfree(scan_config); 1015 return ret; 1016 } 1017 1018 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1019 { 1020 int i; 1021 1022 for (i = 0; i < mvm->max_scans; i++) 1023 if (mvm->scan_uid_status[i] == status) 1024 return i; 1025 1026 return -ENOENT; 1027 } 1028 1029 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1030 struct iwl_scan_req_umac *cmd, 1031 struct iwl_mvm_scan_params *params) 1032 { 1033 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 1034 cmd->active_dwell = scan_timing[params->type].dwell_active; 1035 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 1036 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 1037 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 1038 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 1039 cmd->scan_priority = 1040 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 1041 1042 if (iwl_mvm_is_regular_scan(params)) 1043 cmd->ooc_priority = 1044 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 1045 else 1046 cmd->ooc_priority = 1047 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2); 1048 } 1049 1050 static void 1051 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1052 struct ieee80211_channel **channels, 1053 int n_channels, u32 ssid_bitmap, 1054 struct iwl_scan_req_umac *cmd) 1055 { 1056 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data; 1057 int i; 1058 1059 for (i = 0; i < n_channels; i++) { 1060 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1061 channel_cfg[i].channel_num = channels[i]->hw_value; 1062 channel_cfg[i].iter_count = 1; 1063 channel_cfg[i].iter_interval = 0; 1064 } 1065 } 1066 1067 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1068 struct iwl_mvm_scan_params *params, 1069 struct ieee80211_vif *vif) 1070 { 1071 int flags = 0; 1072 1073 if (params->n_ssids == 0) 1074 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1075 1076 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1077 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1078 1079 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 1080 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1081 1082 if (iwl_mvm_rrm_scan_needed(mvm)) 1083 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1084 1085 if (params->pass_all) 1086 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1087 else 1088 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1089 1090 if (!iwl_mvm_is_regular_scan(params)) 1091 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1092 1093 #ifdef CONFIG_IWLWIFI_DEBUGFS 1094 if (mvm->scan_iter_notif_enabled) 1095 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1096 #endif 1097 1098 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1099 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1100 1101 if (iwl_mvm_is_regular_scan(params) && 1102 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1103 params->type != IWL_SCAN_TYPE_FRAGMENTED) 1104 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1105 1106 return flags; 1107 } 1108 1109 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1110 struct iwl_mvm_scan_params *params, 1111 int type) 1112 { 1113 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1114 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + 1115 sizeof(struct iwl_scan_channel_cfg_umac) * 1116 mvm->fw->ucode_capa.n_scan_channels; 1117 int uid, i; 1118 u32 ssid_bitmap = 0; 1119 1120 lockdep_assert_held(&mvm->mutex); 1121 1122 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1123 return -EINVAL; 1124 1125 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1126 if (uid < 0) 1127 return uid; 1128 1129 memset(cmd, 0, ksize(cmd)); 1130 1131 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1132 1133 mvm->scan_uid_status[uid] = type; 1134 1135 cmd->uid = cpu_to_le32(uid); 1136 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params, 1137 vif)); 1138 1139 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1140 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1141 1142 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1143 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1144 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1145 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1146 1147 cmd->n_channels = params->n_channels; 1148 1149 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1150 1151 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1152 params->n_channels, ssid_bitmap, cmd); 1153 1154 for (i = 0; i < params->n_scan_plans; i++) { 1155 struct cfg80211_sched_scan_plan *scan_plan = 1156 ¶ms->scan_plans[i]; 1157 1158 sec_part->schedule[i].iter_count = scan_plan->iterations; 1159 sec_part->schedule[i].interval = 1160 cpu_to_le16(scan_plan->interval); 1161 } 1162 1163 /* 1164 * If the number of iterations of the last scan plan is set to 1165 * zero, it should run infinitely. However, this is not always the case. 1166 * For example, when regular scan is requested the driver sets one scan 1167 * plan with one iteration. 1168 */ 1169 if (!sec_part->schedule[i - 1].iter_count) 1170 sec_part->schedule[i - 1].iter_count = 0xff; 1171 1172 sec_part->delay = cpu_to_le16(params->delay); 1173 sec_part->preq = params->preq; 1174 1175 return 0; 1176 } 1177 1178 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1179 { 1180 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1181 } 1182 1183 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1184 { 1185 /* This looks a bit arbitrary, but the idea is that if we run 1186 * out of possible simultaneous scans and the userspace is 1187 * trying to run a scan type that is already running, we 1188 * return -EBUSY. But if the userspace wants to start a 1189 * different type of scan, we stop the opposite type to make 1190 * space for the new request. The reason is backwards 1191 * compatibility with old wpa_supplicant that wouldn't stop a 1192 * scheduled scan before starting a normal scan. 1193 */ 1194 1195 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1196 return 0; 1197 1198 /* Use a switch, even though this is a bitmask, so that more 1199 * than one bits set will fall in default and we will warn. 1200 */ 1201 switch (type) { 1202 case IWL_MVM_SCAN_REGULAR: 1203 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1204 return -EBUSY; 1205 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1206 case IWL_MVM_SCAN_SCHED: 1207 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1208 return -EBUSY; 1209 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1210 case IWL_MVM_SCAN_NETDETECT: 1211 /* No need to stop anything for net-detect since the 1212 * firmware is restarted anyway. This way, any sched 1213 * scans that were running will be restarted when we 1214 * resume. 1215 */ 1216 return 0; 1217 default: 1218 WARN_ON(1); 1219 break; 1220 } 1221 1222 return -EIO; 1223 } 1224 1225 #define SCAN_TIMEOUT (20 * HZ) 1226 1227 void iwl_mvm_scan_timeout(unsigned long data) 1228 { 1229 struct iwl_mvm *mvm = (struct iwl_mvm *)data; 1230 1231 IWL_ERR(mvm, "regular scan timed out\n"); 1232 1233 del_timer(&mvm->scan_timer); 1234 iwl_force_nmi(mvm->trans); 1235 } 1236 1237 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1238 struct cfg80211_scan_request *req, 1239 struct ieee80211_scan_ies *ies) 1240 { 1241 struct iwl_host_cmd hcmd = { 1242 .len = { iwl_mvm_scan_size(mvm), }, 1243 .data = { mvm->scan_cmd, }, 1244 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1245 }; 1246 struct iwl_mvm_scan_params params = {}; 1247 int ret; 1248 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1249 1250 lockdep_assert_held(&mvm->mutex); 1251 1252 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1253 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1254 return -EBUSY; 1255 } 1256 1257 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1258 if (ret) 1259 return ret; 1260 1261 /* we should have failed registration if scan_cmd was NULL */ 1262 if (WARN_ON(!mvm->scan_cmd)) 1263 return -ENOMEM; 1264 1265 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1266 return -ENOBUFS; 1267 1268 params.n_ssids = req->n_ssids; 1269 params.flags = req->flags; 1270 params.n_channels = req->n_channels; 1271 params.delay = 0; 1272 params.ssids = req->ssids; 1273 params.channels = req->channels; 1274 params.mac_addr = req->mac_addr; 1275 params.mac_addr_mask = req->mac_addr_mask; 1276 params.no_cck = req->no_cck; 1277 params.pass_all = true; 1278 params.n_match_sets = 0; 1279 params.match_sets = NULL; 1280 1281 params.scan_plans = &scan_plan; 1282 params.n_scan_plans = 1; 1283 1284 params.type = 1285 iwl_mvm_get_scan_type(mvm, 1286 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1287 1288 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1289 1290 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1291 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1292 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1293 IWL_MVM_SCAN_REGULAR); 1294 } else { 1295 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1296 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1297 } 1298 1299 if (ret) 1300 return ret; 1301 1302 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1303 if (ret) { 1304 /* If the scan failed, it usually means that the FW was unable 1305 * to allocate the time events. Warn on it, but maybe we 1306 * should try to send the command again with different params. 1307 */ 1308 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1309 return ret; 1310 } 1311 1312 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1313 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1314 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1315 1316 mod_timer(&mvm->scan_timer, jiffies + SCAN_TIMEOUT); 1317 1318 return 0; 1319 } 1320 1321 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1322 struct ieee80211_vif *vif, 1323 struct cfg80211_sched_scan_request *req, 1324 struct ieee80211_scan_ies *ies, 1325 int type) 1326 { 1327 struct iwl_host_cmd hcmd = { 1328 .len = { iwl_mvm_scan_size(mvm), }, 1329 .data = { mvm->scan_cmd, }, 1330 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1331 }; 1332 struct iwl_mvm_scan_params params = {}; 1333 int ret; 1334 1335 lockdep_assert_held(&mvm->mutex); 1336 1337 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1338 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1339 return -EBUSY; 1340 } 1341 1342 ret = iwl_mvm_check_running_scans(mvm, type); 1343 if (ret) 1344 return ret; 1345 1346 /* we should have failed registration if scan_cmd was NULL */ 1347 if (WARN_ON(!mvm->scan_cmd)) 1348 return -ENOMEM; 1349 1350 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1351 return -ENOBUFS; 1352 1353 params.n_ssids = req->n_ssids; 1354 params.flags = req->flags; 1355 params.n_channels = req->n_channels; 1356 params.ssids = req->ssids; 1357 params.channels = req->channels; 1358 params.mac_addr = req->mac_addr; 1359 params.mac_addr_mask = req->mac_addr_mask; 1360 params.no_cck = false; 1361 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1362 params.n_match_sets = req->n_match_sets; 1363 params.match_sets = req->match_sets; 1364 if (!req->n_scan_plans) 1365 return -EINVAL; 1366 1367 params.n_scan_plans = req->n_scan_plans; 1368 params.scan_plans = req->scan_plans; 1369 1370 params.type = 1371 iwl_mvm_get_scan_type(mvm, 1372 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1373 1374 /* In theory, LMAC scans can handle a 32-bit delay, but since 1375 * waiting for over 18 hours to start the scan is a bit silly 1376 * and to keep it aligned with UMAC scans (which only support 1377 * 16-bit delays), trim it down to 16-bits. 1378 */ 1379 if (req->delay > U16_MAX) { 1380 IWL_DEBUG_SCAN(mvm, 1381 "delay value is > 16-bits, set to max possible\n"); 1382 params.delay = U16_MAX; 1383 } else { 1384 params.delay = req->delay; 1385 } 1386 1387 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1388 if (ret) 1389 return ret; 1390 1391 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1392 1393 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1394 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1395 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1396 } else { 1397 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1398 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1399 } 1400 1401 if (ret) 1402 return ret; 1403 1404 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1405 if (!ret) { 1406 IWL_DEBUG_SCAN(mvm, 1407 "Sched scan request was sent successfully\n"); 1408 mvm->scan_status |= type; 1409 } else { 1410 /* If the scan failed, it usually means that the FW was unable 1411 * to allocate the time events. Warn on it, but maybe we 1412 * should try to send the command again with different params. 1413 */ 1414 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1415 } 1416 1417 return ret; 1418 } 1419 1420 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1421 struct iwl_rx_cmd_buffer *rxb) 1422 { 1423 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1424 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1425 u32 uid = __le32_to_cpu(notif->uid); 1426 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1427 1428 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1429 return; 1430 1431 /* if the scan is already stopping, we don't need to notify mac80211 */ 1432 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1433 ieee80211_scan_completed(mvm->hw, aborted); 1434 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1435 del_timer(&mvm->scan_timer); 1436 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1437 ieee80211_sched_scan_stopped(mvm->hw); 1438 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1439 } 1440 1441 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1442 IWL_DEBUG_SCAN(mvm, 1443 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1444 uid, mvm->scan_uid_status[uid], 1445 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1446 "completed" : "aborted", 1447 iwl_mvm_ebs_status_str(notif->ebs_status)); 1448 IWL_DEBUG_SCAN(mvm, 1449 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1450 notif->last_schedule, notif->last_iter, 1451 __le32_to_cpu(notif->time_from_last_iter)); 1452 1453 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1454 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1455 mvm->last_ebs_successful = false; 1456 1457 mvm->scan_uid_status[uid] = 0; 1458 } 1459 1460 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1461 struct iwl_rx_cmd_buffer *rxb) 1462 { 1463 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1464 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1465 u8 buf[256]; 1466 1467 IWL_DEBUG_SCAN(mvm, 1468 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n", 1469 notif->status, notif->scanned_channels, 1470 iwl_mvm_dump_channel_list(notif->results, 1471 notif->scanned_channels, buf, 1472 sizeof(buf))); 1473 1474 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1475 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1476 ieee80211_sched_scan_results(mvm->hw); 1477 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1478 } 1479 } 1480 1481 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1482 { 1483 struct iwl_umac_scan_abort cmd = {}; 1484 int uid, ret; 1485 1486 lockdep_assert_held(&mvm->mutex); 1487 1488 /* We should always get a valid index here, because we already 1489 * checked that this type of scan was running in the generic 1490 * code. 1491 */ 1492 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1493 if (WARN_ON_ONCE(uid < 0)) 1494 return uid; 1495 1496 cmd.uid = cpu_to_le32(uid); 1497 1498 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1499 1500 ret = iwl_mvm_send_cmd_pdu(mvm, 1501 iwl_cmd_id(SCAN_ABORT_UMAC, 1502 IWL_ALWAYS_LONG_GROUP, 0), 1503 0, sizeof(cmd), &cmd); 1504 if (!ret) 1505 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1506 1507 return ret; 1508 } 1509 1510 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1511 { 1512 struct iwl_notification_wait wait_scan_done; 1513 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1514 SCAN_OFFLOAD_COMPLETE, }; 1515 int ret; 1516 1517 lockdep_assert_held(&mvm->mutex); 1518 1519 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1520 scan_done_notif, 1521 ARRAY_SIZE(scan_done_notif), 1522 NULL, NULL); 1523 1524 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1525 1526 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1527 ret = iwl_mvm_umac_scan_abort(mvm, type); 1528 else 1529 ret = iwl_mvm_lmac_scan_abort(mvm); 1530 1531 if (ret) { 1532 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1533 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1534 return ret; 1535 } 1536 1537 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1538 1539 return ret; 1540 } 1541 1542 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1543 { 1544 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1545 return sizeof(struct iwl_scan_req_umac) + 1546 sizeof(struct iwl_scan_channel_cfg_umac) * 1547 mvm->fw->ucode_capa.n_scan_channels + 1548 sizeof(struct iwl_scan_req_umac_tail); 1549 1550 return sizeof(struct iwl_scan_req_lmac) + 1551 sizeof(struct iwl_scan_channel_cfg_lmac) * 1552 mvm->fw->ucode_capa.n_scan_channels + 1553 sizeof(struct iwl_scan_probe_req); 1554 } 1555 1556 /* 1557 * This function is used in nic restart flow, to inform mac80211 about scans 1558 * that was aborted by restart flow or by an assert. 1559 */ 1560 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1561 { 1562 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1563 int uid, i; 1564 1565 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1566 if (uid >= 0) { 1567 ieee80211_scan_completed(mvm->hw, true); 1568 mvm->scan_uid_status[uid] = 0; 1569 } 1570 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1571 if (uid >= 0 && !mvm->restart_fw) { 1572 ieee80211_sched_scan_stopped(mvm->hw); 1573 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1574 mvm->scan_uid_status[uid] = 0; 1575 } 1576 1577 /* We shouldn't have any UIDs still set. Loop over all the 1578 * UIDs to make sure there's nothing left there and warn if 1579 * any is found. 1580 */ 1581 for (i = 0; i < mvm->max_scans; i++) { 1582 if (WARN_ONCE(mvm->scan_uid_status[i], 1583 "UMAC scan UID %d status was not cleaned\n", 1584 i)) 1585 mvm->scan_uid_status[i] = 0; 1586 } 1587 } else { 1588 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) 1589 ieee80211_scan_completed(mvm->hw, true); 1590 1591 /* Sched scan will be restarted by mac80211 in 1592 * restart_hw, so do not report if FW is about to be 1593 * restarted. 1594 */ 1595 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1596 !mvm->restart_fw) { 1597 ieee80211_sched_scan_stopped(mvm->hw); 1598 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1599 } 1600 } 1601 } 1602 1603 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1604 { 1605 int ret; 1606 1607 if (!(mvm->scan_status & type)) 1608 return 0; 1609 1610 if (iwl_mvm_is_radio_killed(mvm)) { 1611 ret = 0; 1612 goto out; 1613 } 1614 1615 ret = iwl_mvm_scan_stop_wait(mvm, type); 1616 if (!ret) 1617 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 1618 out: 1619 /* Clear the scan status so the next scan requests will 1620 * succeed and mark the scan as stopping, so that the Rx 1621 * handler doesn't do anything, as the scan was stopped from 1622 * above. 1623 */ 1624 mvm->scan_status &= ~type; 1625 1626 if (type == IWL_MVM_SCAN_REGULAR) { 1627 /* Since the rx handler won't do anything now, we have 1628 * to release the scan reference here. 1629 */ 1630 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1631 del_timer(&mvm->scan_timer); 1632 if (notify) 1633 ieee80211_scan_completed(mvm->hw, true); 1634 } else if (notify) { 1635 ieee80211_sched_scan_stopped(mvm->hw); 1636 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1637 } 1638 1639 return ret; 1640 } 1641