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 u32 measurement_dwell; 145 }; 146 147 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 148 { 149 if (mvm->scan_rx_ant != ANT_NONE) 150 return mvm->scan_rx_ant; 151 return iwl_mvm_get_valid_rx_ant(mvm); 152 } 153 154 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 155 { 156 u16 rx_chain; 157 u8 rx_ant; 158 159 rx_ant = iwl_mvm_scan_rx_ant(mvm); 160 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 161 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 162 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 163 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 164 return cpu_to_le16(rx_chain); 165 } 166 167 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band) 168 { 169 if (band == NL80211_BAND_2GHZ) 170 return cpu_to_le32(PHY_BAND_24); 171 else 172 return cpu_to_le32(PHY_BAND_5); 173 } 174 175 static inline __le32 176 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, 177 bool no_cck) 178 { 179 u32 tx_ant; 180 181 mvm->scan_last_antenna_idx = 182 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 183 mvm->scan_last_antenna_idx); 184 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 185 186 if (band == NL80211_BAND_2GHZ && !no_cck) 187 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 188 tx_ant); 189 else 190 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 191 } 192 193 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 194 struct ieee80211_vif *vif) 195 { 196 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 197 int *global_cnt = data; 198 199 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 200 mvmvif->phy_ctxt->id < MAX_PHYS) 201 *global_cnt += 1; 202 } 203 204 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 205 { 206 return IWL_MVM_TRAFFIC_LOW; 207 } 208 209 static enum 210 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device) 211 { 212 int global_cnt = 0; 213 enum iwl_mvm_traffic_load load; 214 bool low_latency; 215 216 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 217 IEEE80211_IFACE_ITER_NORMAL, 218 iwl_mvm_scan_condition_iterator, 219 &global_cnt); 220 if (!global_cnt) 221 return IWL_SCAN_TYPE_UNASSOC; 222 223 load = iwl_mvm_get_traffic_load(mvm); 224 low_latency = iwl_mvm_low_latency(mvm); 225 226 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device && 227 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) 228 return IWL_SCAN_TYPE_FRAGMENTED; 229 230 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 231 return IWL_SCAN_TYPE_MILD; 232 233 return IWL_SCAN_TYPE_WILD; 234 } 235 236 static int 237 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm, 238 struct cfg80211_scan_request *req, 239 struct iwl_mvm_scan_params *params) 240 { 241 if (!req->duration) 242 return 0; 243 244 if (req->duration_mandatory && 245 req->duration > scan_timing[params->type].max_out_time) { 246 IWL_DEBUG_SCAN(mvm, 247 "Measurement scan - too long dwell %hu (max out time %u)\n", 248 req->duration, 249 scan_timing[params->type].max_out_time); 250 return -EOPNOTSUPP; 251 } 252 253 return min_t(u32, (u32)req->duration, 254 scan_timing[params->type].max_out_time); 255 } 256 257 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 258 { 259 /* require rrm scan whenever the fw supports it */ 260 return fw_has_capa(&mvm->fw->ucode_capa, 261 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 262 } 263 264 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 265 { 266 int max_probe_len; 267 268 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 269 270 /* we create the 802.11 header and SSID element */ 271 max_probe_len -= 24 + 2; 272 273 /* DS parameter set element is added on 2.4GHZ band if required */ 274 if (iwl_mvm_rrm_scan_needed(mvm)) 275 max_probe_len -= 3; 276 277 return max_probe_len; 278 } 279 280 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 281 { 282 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 283 284 /* TODO: [BUG] This function should return the maximum allowed size of 285 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 286 * in the same command. So the correct implementation of this function 287 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 288 * command has only 512 bytes and it would leave us with about 240 289 * bytes for scan IEs, which is clearly not enough. So meanwhile 290 * we will report an incorrect value. This may result in a failure to 291 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 292 * functions with -ENOBUFS, if a large enough probe will be provided. 293 */ 294 return max_ie_len; 295 } 296 297 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res, 298 int num_res, u8 *buf, size_t buf_size) 299 { 300 int i; 301 u8 *pos = buf, *end = buf + buf_size; 302 303 for (i = 0; pos < end && i < num_res; i++) 304 pos += snprintf(pos, end - pos, " %u", res[i].channel); 305 306 /* terminate the string in case the buffer was too short */ 307 *(buf + buf_size - 1) = '\0'; 308 309 return buf; 310 } 311 312 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 313 struct iwl_rx_cmd_buffer *rxb) 314 { 315 struct iwl_rx_packet *pkt = rxb_addr(rxb); 316 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 317 u8 buf[256]; 318 319 IWL_DEBUG_SCAN(mvm, 320 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n", 321 notif->status, notif->scanned_channels, 322 iwl_mvm_dump_channel_list(notif->results, 323 notif->scanned_channels, buf, 324 sizeof(buf))); 325 326 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 327 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 328 ieee80211_sched_scan_results(mvm->hw); 329 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 330 } 331 } 332 333 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 334 struct iwl_rx_cmd_buffer *rxb) 335 { 336 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 337 ieee80211_sched_scan_results(mvm->hw); 338 } 339 340 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 341 { 342 switch (status) { 343 case IWL_SCAN_EBS_SUCCESS: 344 return "successful"; 345 case IWL_SCAN_EBS_INACTIVE: 346 return "inactive"; 347 case IWL_SCAN_EBS_FAILED: 348 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 349 default: 350 return "failed"; 351 } 352 } 353 354 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 355 struct iwl_rx_cmd_buffer *rxb) 356 { 357 struct iwl_rx_packet *pkt = rxb_addr(rxb); 358 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 359 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 360 361 /* If this happens, the firmware has mistakenly sent an LMAC 362 * notification during UMAC scans -- warn and ignore it. 363 */ 364 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 365 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 366 return; 367 368 /* scan status must be locked for proper checking */ 369 lockdep_assert_held(&mvm->mutex); 370 371 /* We first check if we were stopping a scan, in which case we 372 * just clear the stopping flag. Then we check if it was a 373 * firmware initiated stop, in which case we need to inform 374 * mac80211. 375 * Note that we can have a stopping and a running scan 376 * simultaneously, but we can't have two different types of 377 * scans stopping or running at the same time (since LMAC 378 * doesn't support it). 379 */ 380 381 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 382 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 383 384 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 385 aborted ? "aborted" : "completed", 386 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 387 IWL_DEBUG_SCAN(mvm, 388 "Last line %d, Last iteration %d, Time after last iteration %d\n", 389 scan_notif->last_schedule_line, 390 scan_notif->last_schedule_iteration, 391 __le32_to_cpu(scan_notif->time_after_last_iter)); 392 393 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 394 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 395 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 396 aborted ? "aborted" : "completed", 397 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 398 399 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 400 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 401 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 402 403 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 404 aborted ? "aborted" : "completed", 405 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 406 IWL_DEBUG_SCAN(mvm, 407 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 408 scan_notif->last_schedule_line, 409 scan_notif->last_schedule_iteration, 410 __le32_to_cpu(scan_notif->time_after_last_iter)); 411 412 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 413 ieee80211_sched_scan_stopped(mvm->hw); 414 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 415 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 416 struct cfg80211_scan_info info = { 417 .aborted = aborted, 418 }; 419 420 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 421 aborted ? "aborted" : "completed", 422 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 423 424 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 425 ieee80211_scan_completed(mvm->hw, &info); 426 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 427 cancel_delayed_work(&mvm->scan_timeout_dwork); 428 } else { 429 IWL_ERR(mvm, 430 "got scan complete notification but no scan is running\n"); 431 } 432 433 mvm->last_ebs_successful = 434 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 435 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 436 } 437 438 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 439 { 440 int i; 441 442 for (i = 0; i < PROBE_OPTION_MAX; i++) { 443 if (!ssid_list[i].len) 444 break; 445 if (ssid_list[i].len == ssid_len && 446 !memcmp(ssid_list->ssid, ssid, ssid_len)) 447 return i; 448 } 449 return -1; 450 } 451 452 /* We insert the SSIDs in an inverted order, because the FW will 453 * invert it back. 454 */ 455 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 456 struct iwl_ssid_ie *ssids, 457 u32 *ssid_bitmap) 458 { 459 int i, j; 460 int index; 461 462 /* 463 * copy SSIDs from match list. 464 * iwl_config_sched_scan_profiles() uses the order of these ssids to 465 * config match list. 466 */ 467 for (i = 0, j = params->n_match_sets - 1; 468 j >= 0 && i < PROBE_OPTION_MAX; 469 i++, j--) { 470 /* skip empty SSID matchsets */ 471 if (!params->match_sets[j].ssid.ssid_len) 472 continue; 473 ssids[i].id = WLAN_EID_SSID; 474 ssids[i].len = params->match_sets[j].ssid.ssid_len; 475 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 476 ssids[i].len); 477 } 478 479 /* add SSIDs from scan SSID list */ 480 *ssid_bitmap = 0; 481 for (j = params->n_ssids - 1; 482 j >= 0 && i < PROBE_OPTION_MAX; 483 i++, j--) { 484 index = iwl_ssid_exist(params->ssids[j].ssid, 485 params->ssids[j].ssid_len, 486 ssids); 487 if (index < 0) { 488 ssids[i].id = WLAN_EID_SSID; 489 ssids[i].len = params->ssids[j].ssid_len; 490 memcpy(ssids[i].ssid, params->ssids[j].ssid, 491 ssids[i].len); 492 *ssid_bitmap |= BIT(i); 493 } else { 494 *ssid_bitmap |= BIT(index); 495 } 496 } 497 } 498 499 static int 500 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 501 struct cfg80211_sched_scan_request *req) 502 { 503 struct iwl_scan_offload_profile *profile; 504 struct iwl_scan_offload_profile_cfg *profile_cfg; 505 struct iwl_scan_offload_blacklist *blacklist; 506 struct iwl_host_cmd cmd = { 507 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 508 .len[1] = sizeof(*profile_cfg), 509 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 510 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 511 }; 512 int blacklist_len; 513 int i; 514 int ret; 515 516 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 517 return -EIO; 518 519 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 520 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 521 else 522 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 523 524 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); 525 if (!blacklist) 526 return -ENOMEM; 527 528 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 529 if (!profile_cfg) { 530 ret = -ENOMEM; 531 goto free_blacklist; 532 } 533 534 cmd.data[0] = blacklist; 535 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 536 cmd.data[1] = profile_cfg; 537 538 /* No blacklist configuration */ 539 540 profile_cfg->num_profiles = req->n_match_sets; 541 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 542 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 543 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 544 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 545 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 546 547 for (i = 0; i < req->n_match_sets; i++) { 548 profile = &profile_cfg->profiles[i]; 549 profile->ssid_index = i; 550 /* Support any cipher and auth algorithm */ 551 profile->unicast_cipher = 0xff; 552 profile->auth_alg = 0xff; 553 profile->network_type = IWL_NETWORK_TYPE_ANY; 554 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 555 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 556 } 557 558 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 559 560 ret = iwl_mvm_send_cmd(mvm, &cmd); 561 kfree(profile_cfg); 562 free_blacklist: 563 kfree(blacklist); 564 565 return ret; 566 } 567 568 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 569 struct cfg80211_sched_scan_request *req) 570 { 571 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 572 IWL_DEBUG_SCAN(mvm, 573 "Sending scheduled scan with filtering, n_match_sets %d\n", 574 req->n_match_sets); 575 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 576 return false; 577 } 578 579 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 580 581 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 582 return true; 583 } 584 585 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 586 { 587 int ret; 588 struct iwl_host_cmd cmd = { 589 .id = SCAN_OFFLOAD_ABORT_CMD, 590 }; 591 u32 status; 592 593 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 594 if (ret) 595 return ret; 596 597 if (status != CAN_ABORT_STATUS) { 598 /* 599 * The scan abort will return 1 for success or 600 * 2 for "failure". A failure condition can be 601 * due to simply not being in an active scan which 602 * can occur if we send the scan abort before the 603 * microcode has notified us that a scan is completed. 604 */ 605 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 606 ret = -ENOENT; 607 } 608 609 return ret; 610 } 611 612 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 613 struct iwl_scan_req_tx_cmd *tx_cmd, 614 bool no_cck) 615 { 616 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 617 TX_CMD_FLG_BT_DIS); 618 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 619 NL80211_BAND_2GHZ, 620 no_cck); 621 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 622 623 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 624 TX_CMD_FLG_BT_DIS); 625 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 626 NL80211_BAND_5GHZ, 627 no_cck); 628 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 629 } 630 631 static void 632 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 633 struct ieee80211_channel **channels, 634 int n_channels, u32 ssid_bitmap, 635 struct iwl_scan_req_lmac *cmd) 636 { 637 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 638 int i; 639 640 for (i = 0; i < n_channels; i++) { 641 channel_cfg[i].channel_num = 642 cpu_to_le16(channels[i]->hw_value); 643 channel_cfg[i].iter_count = cpu_to_le16(1); 644 channel_cfg[i].iter_interval = 0; 645 channel_cfg[i].flags = 646 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 647 ssid_bitmap); 648 } 649 } 650 651 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 652 size_t len, u8 *const pos) 653 { 654 static const u8 before_ds_params[] = { 655 WLAN_EID_SSID, 656 WLAN_EID_SUPP_RATES, 657 WLAN_EID_REQUEST, 658 WLAN_EID_EXT_SUPP_RATES, 659 }; 660 size_t offs; 661 u8 *newpos = pos; 662 663 if (!iwl_mvm_rrm_scan_needed(mvm)) { 664 memcpy(newpos, ies, len); 665 return newpos + len; 666 } 667 668 offs = ieee80211_ie_split(ies, len, 669 before_ds_params, 670 ARRAY_SIZE(before_ds_params), 671 0); 672 673 memcpy(newpos, ies, offs); 674 newpos += offs; 675 676 /* Add a placeholder for DS Parameter Set element */ 677 *newpos++ = WLAN_EID_DS_PARAMS; 678 *newpos++ = 1; 679 *newpos++ = 0; 680 681 memcpy(newpos, ies + offs, len - offs); 682 newpos += len - offs; 683 684 return newpos; 685 } 686 687 static void 688 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 689 struct ieee80211_scan_ies *ies, 690 struct iwl_mvm_scan_params *params) 691 { 692 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 693 u8 *pos, *newpos; 694 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 695 params->mac_addr : NULL; 696 697 /* 698 * Unfortunately, right now the offload scan doesn't support randomising 699 * within the firmware, so until the firmware API is ready we implement 700 * it in the driver. This means that the scan iterations won't really be 701 * random, only when it's restarted, but at least that helps a bit. 702 */ 703 if (mac_addr) 704 get_random_mask_addr(frame->sa, mac_addr, 705 params->mac_addr_mask); 706 else 707 memcpy(frame->sa, vif->addr, ETH_ALEN); 708 709 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 710 eth_broadcast_addr(frame->da); 711 eth_broadcast_addr(frame->bssid); 712 frame->seq_ctrl = 0; 713 714 pos = frame->u.probe_req.variable; 715 *pos++ = WLAN_EID_SSID; 716 *pos++ = 0; 717 718 params->preq.mac_header.offset = 0; 719 params->preq.mac_header.len = cpu_to_le16(24 + 2); 720 721 /* Insert ds parameter set element on 2.4 GHz band */ 722 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 723 ies->ies[NL80211_BAND_2GHZ], 724 ies->len[NL80211_BAND_2GHZ], 725 pos); 726 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 727 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 728 pos = newpos; 729 730 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 731 ies->len[NL80211_BAND_5GHZ]); 732 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 733 params->preq.band_data[1].len = 734 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 735 pos += ies->len[NL80211_BAND_5GHZ]; 736 737 memcpy(pos, ies->common_ies, ies->common_ie_len); 738 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 739 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 740 } 741 742 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 743 struct iwl_scan_req_lmac *cmd, 744 struct iwl_mvm_scan_params *params) 745 { 746 cmd->active_dwell = scan_timing[params->type].dwell_active; 747 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 748 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 749 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 750 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 751 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 752 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 753 } 754 755 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 756 struct ieee80211_scan_ies *ies, 757 int n_channels) 758 { 759 return ((n_ssids <= PROBE_OPTION_MAX) && 760 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 761 (ies->common_ie_len + 762 ies->len[NL80211_BAND_2GHZ] + 763 ies->len[NL80211_BAND_5GHZ] <= 764 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 765 } 766 767 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 768 struct ieee80211_vif *vif) 769 { 770 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 771 772 /* We can only use EBS if: 773 * 1. the feature is supported; 774 * 2. the last EBS was successful; 775 * 3. if only single scan, the single scan EBS API is supported; 776 * 4. it's not a p2p find operation. 777 */ 778 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 779 mvm->last_ebs_successful && 780 vif->type != NL80211_IFTYPE_P2P_DEVICE); 781 } 782 783 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 784 { 785 return params->n_scan_plans == 1 && 786 params->scan_plans[0].iterations == 1; 787 } 788 789 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 790 struct iwl_mvm_scan_params *params, 791 struct ieee80211_vif *vif) 792 { 793 int flags = 0; 794 795 if (params->n_ssids == 0) 796 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 797 798 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 799 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 800 801 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 802 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 803 804 if (iwl_mvm_rrm_scan_needed(mvm)) 805 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 806 807 if (params->pass_all) 808 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 809 else 810 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 811 812 #ifdef CONFIG_IWLWIFI_DEBUGFS 813 if (mvm->scan_iter_notif_enabled) 814 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 815 #endif 816 817 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 818 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 819 820 if (iwl_mvm_is_regular_scan(params) && 821 vif->type != NL80211_IFTYPE_P2P_DEVICE && 822 params->type != IWL_SCAN_TYPE_FRAGMENTED) 823 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 824 825 return flags; 826 } 827 828 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 829 struct iwl_mvm_scan_params *params) 830 { 831 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 832 struct iwl_scan_probe_req *preq = 833 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 834 mvm->fw->ucode_capa.n_scan_channels); 835 u32 ssid_bitmap = 0; 836 int i; 837 838 lockdep_assert_held(&mvm->mutex); 839 840 memset(cmd, 0, ksize(cmd)); 841 842 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 843 return -EINVAL; 844 845 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 846 847 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 848 cmd->iter_num = cpu_to_le32(1); 849 cmd->n_channels = (u8)params->n_channels; 850 851 cmd->delay = cpu_to_le32(params->delay); 852 853 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 854 vif)); 855 856 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 857 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 858 MAC_FILTER_IN_BEACON); 859 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 860 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 861 862 /* this API uses bits 1-20 instead of 0-19 */ 863 ssid_bitmap <<= 1; 864 865 for (i = 0; i < params->n_scan_plans; i++) { 866 struct cfg80211_sched_scan_plan *scan_plan = 867 ¶ms->scan_plans[i]; 868 869 cmd->schedule[i].delay = 870 cpu_to_le16(scan_plan->interval); 871 cmd->schedule[i].iterations = scan_plan->iterations; 872 cmd->schedule[i].full_scan_mul = 1; 873 } 874 875 /* 876 * If the number of iterations of the last scan plan is set to 877 * zero, it should run infinitely. However, this is not always the case. 878 * For example, when regular scan is requested the driver sets one scan 879 * plan with one iteration. 880 */ 881 if (!cmd->schedule[i - 1].iterations) 882 cmd->schedule[i - 1].iterations = 0xff; 883 884 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 885 cmd->channel_opt[0].flags = 886 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 887 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 888 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 889 cmd->channel_opt[0].non_ebs_ratio = 890 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 891 cmd->channel_opt[1].flags = 892 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 893 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 894 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 895 cmd->channel_opt[1].non_ebs_ratio = 896 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 897 } 898 899 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 900 params->n_channels, ssid_bitmap, cmd); 901 902 *preq = params->preq; 903 904 return 0; 905 } 906 907 static int rate_to_scan_rate_flag(unsigned int rate) 908 { 909 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 910 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 911 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 912 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 913 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 914 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 915 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 916 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 917 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 918 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 919 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 920 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 921 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 922 }; 923 924 return rate_to_scan_rate[rate]; 925 } 926 927 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 928 { 929 struct ieee80211_supported_band *band; 930 unsigned int rates = 0; 931 int i; 932 933 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 934 for (i = 0; i < band->n_bitrates; i++) 935 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 936 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 937 for (i = 0; i < band->n_bitrates; i++) 938 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 939 940 /* Set both basic rates and supported rates */ 941 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 942 943 return cpu_to_le32(rates); 944 } 945 946 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 947 { 948 struct iwl_scan_config *scan_config; 949 struct ieee80211_supported_band *band; 950 int num_channels = 951 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 952 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 953 int ret, i, j = 0, cmd_size; 954 struct iwl_host_cmd cmd = { 955 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 956 }; 957 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 958 959 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 960 return -ENOBUFS; 961 962 if (type == mvm->scan_type) { 963 IWL_DEBUG_SCAN(mvm, 964 "Ignoring UMAC scan config of the same type\n"); 965 return 0; 966 } 967 968 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels; 969 970 scan_config = kzalloc(cmd_size, GFP_KERNEL); 971 if (!scan_config) 972 return -ENOMEM; 973 974 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE | 975 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 976 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 977 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 978 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 979 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 980 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 981 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 982 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| 983 SCAN_CONFIG_N_CHANNELS(num_channels) | 984 (type == IWL_SCAN_TYPE_FRAGMENTED ? 985 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 986 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED)); 987 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 988 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 989 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm); 990 scan_config->out_of_channel_time = 991 cpu_to_le32(scan_timing[type].max_out_time); 992 scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 993 scan_config->dwell_active = scan_timing[type].dwell_active; 994 scan_config->dwell_passive = scan_timing[type].dwell_passive; 995 scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented; 996 scan_config->dwell_extended = scan_timing[type].dwell_extended; 997 998 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 999 1000 scan_config->bcast_sta_id = mvm->aux_sta.sta_id; 1001 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS | 1002 IWL_CHANNEL_FLAG_ACCURATE_EBS | 1003 IWL_CHANNEL_FLAG_EBS_ADD | 1004 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 1005 1006 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1007 for (i = 0; i < band->n_channels; i++, j++) 1008 scan_config->channel_array[j] = band->channels[i].hw_value; 1009 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1010 for (i = 0; i < band->n_channels; i++, j++) 1011 scan_config->channel_array[j] = band->channels[i].hw_value; 1012 1013 cmd.data[0] = scan_config; 1014 cmd.len[0] = cmd_size; 1015 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1016 1017 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1018 1019 ret = iwl_mvm_send_cmd(mvm, &cmd); 1020 if (!ret) 1021 mvm->scan_type = type; 1022 1023 kfree(scan_config); 1024 return ret; 1025 } 1026 1027 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1028 { 1029 int i; 1030 1031 for (i = 0; i < mvm->max_scans; i++) 1032 if (mvm->scan_uid_status[i] == status) 1033 return i; 1034 1035 return -ENOENT; 1036 } 1037 1038 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1039 struct iwl_scan_req_umac *cmd, 1040 struct iwl_mvm_scan_params *params) 1041 { 1042 if (params->measurement_dwell) { 1043 cmd->active_dwell = params->measurement_dwell; 1044 cmd->passive_dwell = params->measurement_dwell; 1045 cmd->extended_dwell = params->measurement_dwell; 1046 } else { 1047 cmd->active_dwell = scan_timing[params->type].dwell_active; 1048 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 1049 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 1050 } 1051 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 1052 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 1053 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 1054 cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1055 1056 if (iwl_mvm_is_regular_scan(params)) 1057 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1058 else 1059 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2); 1060 } 1061 1062 static void 1063 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1064 struct ieee80211_channel **channels, 1065 int n_channels, u32 ssid_bitmap, 1066 struct iwl_scan_req_umac *cmd) 1067 { 1068 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data; 1069 int i; 1070 1071 for (i = 0; i < n_channels; i++) { 1072 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1073 channel_cfg[i].channel_num = channels[i]->hw_value; 1074 channel_cfg[i].iter_count = 1; 1075 channel_cfg[i].iter_interval = 0; 1076 } 1077 } 1078 1079 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1080 struct iwl_mvm_scan_params *params, 1081 struct ieee80211_vif *vif) 1082 { 1083 u16 flags = 0; 1084 1085 if (params->n_ssids == 0) 1086 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1087 1088 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1089 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1090 1091 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 1092 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1093 1094 if (iwl_mvm_rrm_scan_needed(mvm)) 1095 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1096 1097 if (params->pass_all) 1098 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1099 else 1100 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1101 1102 if (!iwl_mvm_is_regular_scan(params)) 1103 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1104 1105 if (params->measurement_dwell) 1106 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1107 1108 #ifdef CONFIG_IWLWIFI_DEBUGFS 1109 if (mvm->scan_iter_notif_enabled) 1110 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1111 #endif 1112 1113 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1114 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1115 1116 if (iwl_mvm_is_regular_scan(params) && 1117 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1118 params->type != IWL_SCAN_TYPE_FRAGMENTED) 1119 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1120 1121 return flags; 1122 } 1123 1124 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1125 struct iwl_mvm_scan_params *params, 1126 int type) 1127 { 1128 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1129 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + 1130 sizeof(struct iwl_scan_channel_cfg_umac) * 1131 mvm->fw->ucode_capa.n_scan_channels; 1132 int uid, i; 1133 u32 ssid_bitmap = 0; 1134 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); 1135 1136 lockdep_assert_held(&mvm->mutex); 1137 1138 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1139 return -EINVAL; 1140 1141 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1142 if (uid < 0) 1143 return uid; 1144 1145 memset(cmd, 0, ksize(cmd)); 1146 1147 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1148 1149 mvm->scan_uid_status[uid] = type; 1150 1151 cmd->uid = cpu_to_le32(uid); 1152 cmd->general_flags = cpu_to_le16(iwl_mvm_scan_umac_flags(mvm, params, 1153 vif)); 1154 cmd->scan_start_mac_id = scan_vif->id; 1155 1156 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1157 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1158 1159 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1160 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1161 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1162 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1163 1164 cmd->n_channels = params->n_channels; 1165 1166 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1167 1168 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1169 params->n_channels, ssid_bitmap, cmd); 1170 1171 for (i = 0; i < params->n_scan_plans; i++) { 1172 struct cfg80211_sched_scan_plan *scan_plan = 1173 ¶ms->scan_plans[i]; 1174 1175 sec_part->schedule[i].iter_count = scan_plan->iterations; 1176 sec_part->schedule[i].interval = 1177 cpu_to_le16(scan_plan->interval); 1178 } 1179 1180 /* 1181 * If the number of iterations of the last scan plan is set to 1182 * zero, it should run infinitely. However, this is not always the case. 1183 * For example, when regular scan is requested the driver sets one scan 1184 * plan with one iteration. 1185 */ 1186 if (!sec_part->schedule[i - 1].iter_count) 1187 sec_part->schedule[i - 1].iter_count = 0xff; 1188 1189 sec_part->delay = cpu_to_le16(params->delay); 1190 sec_part->preq = params->preq; 1191 1192 return 0; 1193 } 1194 1195 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1196 { 1197 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1198 } 1199 1200 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1201 { 1202 /* This looks a bit arbitrary, but the idea is that if we run 1203 * out of possible simultaneous scans and the userspace is 1204 * trying to run a scan type that is already running, we 1205 * return -EBUSY. But if the userspace wants to start a 1206 * different type of scan, we stop the opposite type to make 1207 * space for the new request. The reason is backwards 1208 * compatibility with old wpa_supplicant that wouldn't stop a 1209 * scheduled scan before starting a normal scan. 1210 */ 1211 1212 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1213 return 0; 1214 1215 /* Use a switch, even though this is a bitmask, so that more 1216 * than one bits set will fall in default and we will warn. 1217 */ 1218 switch (type) { 1219 case IWL_MVM_SCAN_REGULAR: 1220 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1221 return -EBUSY; 1222 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1223 case IWL_MVM_SCAN_SCHED: 1224 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1225 return -EBUSY; 1226 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1227 case IWL_MVM_SCAN_NETDETECT: 1228 /* No need to stop anything for net-detect since the 1229 * firmware is restarted anyway. This way, any sched 1230 * scans that were running will be restarted when we 1231 * resume. 1232 */ 1233 return 0; 1234 default: 1235 WARN_ON(1); 1236 break; 1237 } 1238 1239 return -EIO; 1240 } 1241 1242 #define SCAN_TIMEOUT 20000 1243 1244 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1245 { 1246 struct delayed_work *delayed_work = to_delayed_work(work); 1247 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1248 scan_timeout_dwork); 1249 1250 IWL_ERR(mvm, "regular scan timed out\n"); 1251 1252 iwl_force_nmi(mvm->trans); 1253 } 1254 1255 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1256 struct cfg80211_scan_request *req, 1257 struct ieee80211_scan_ies *ies) 1258 { 1259 struct iwl_host_cmd hcmd = { 1260 .len = { iwl_mvm_scan_size(mvm), }, 1261 .data = { mvm->scan_cmd, }, 1262 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1263 }; 1264 struct iwl_mvm_scan_params params = {}; 1265 int ret; 1266 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1267 1268 lockdep_assert_held(&mvm->mutex); 1269 1270 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1271 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1272 return -EBUSY; 1273 } 1274 1275 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1276 if (ret) 1277 return ret; 1278 1279 /* we should have failed registration if scan_cmd was NULL */ 1280 if (WARN_ON(!mvm->scan_cmd)) 1281 return -ENOMEM; 1282 1283 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1284 return -ENOBUFS; 1285 1286 params.n_ssids = req->n_ssids; 1287 params.flags = req->flags; 1288 params.n_channels = req->n_channels; 1289 params.delay = 0; 1290 params.ssids = req->ssids; 1291 params.channels = req->channels; 1292 params.mac_addr = req->mac_addr; 1293 params.mac_addr_mask = req->mac_addr_mask; 1294 params.no_cck = req->no_cck; 1295 params.pass_all = true; 1296 params.n_match_sets = 0; 1297 params.match_sets = NULL; 1298 1299 params.scan_plans = &scan_plan; 1300 params.n_scan_plans = 1; 1301 1302 params.type = 1303 iwl_mvm_get_scan_type(mvm, 1304 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1305 1306 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms); 1307 if (ret < 0) 1308 return ret; 1309 1310 params.measurement_dwell = ret; 1311 1312 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1313 1314 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1315 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1316 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1317 IWL_MVM_SCAN_REGULAR); 1318 } else { 1319 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1320 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1321 } 1322 1323 if (ret) 1324 return ret; 1325 1326 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1327 if (ret) { 1328 /* If the scan failed, it usually means that the FW was unable 1329 * to allocate the time events. Warn on it, but maybe we 1330 * should try to send the command again with different params. 1331 */ 1332 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1333 return ret; 1334 } 1335 1336 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1337 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1338 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); 1339 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1340 1341 queue_delayed_work(system_wq, &mvm->scan_timeout_dwork, 1342 msecs_to_jiffies(SCAN_TIMEOUT)); 1343 1344 return 0; 1345 } 1346 1347 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1348 struct ieee80211_vif *vif, 1349 struct cfg80211_sched_scan_request *req, 1350 struct ieee80211_scan_ies *ies, 1351 int type) 1352 { 1353 struct iwl_host_cmd hcmd = { 1354 .len = { iwl_mvm_scan_size(mvm), }, 1355 .data = { mvm->scan_cmd, }, 1356 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1357 }; 1358 struct iwl_mvm_scan_params params = {}; 1359 int ret; 1360 1361 lockdep_assert_held(&mvm->mutex); 1362 1363 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1364 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1365 return -EBUSY; 1366 } 1367 1368 ret = iwl_mvm_check_running_scans(mvm, type); 1369 if (ret) 1370 return ret; 1371 1372 /* we should have failed registration if scan_cmd was NULL */ 1373 if (WARN_ON(!mvm->scan_cmd)) 1374 return -ENOMEM; 1375 1376 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1377 return -ENOBUFS; 1378 1379 params.n_ssids = req->n_ssids; 1380 params.flags = req->flags; 1381 params.n_channels = req->n_channels; 1382 params.ssids = req->ssids; 1383 params.channels = req->channels; 1384 params.mac_addr = req->mac_addr; 1385 params.mac_addr_mask = req->mac_addr_mask; 1386 params.no_cck = false; 1387 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1388 params.n_match_sets = req->n_match_sets; 1389 params.match_sets = req->match_sets; 1390 if (!req->n_scan_plans) 1391 return -EINVAL; 1392 1393 params.n_scan_plans = req->n_scan_plans; 1394 params.scan_plans = req->scan_plans; 1395 1396 params.type = 1397 iwl_mvm_get_scan_type(mvm, 1398 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1399 1400 /* In theory, LMAC scans can handle a 32-bit delay, but since 1401 * waiting for over 18 hours to start the scan is a bit silly 1402 * and to keep it aligned with UMAC scans (which only support 1403 * 16-bit delays), trim it down to 16-bits. 1404 */ 1405 if (req->delay > U16_MAX) { 1406 IWL_DEBUG_SCAN(mvm, 1407 "delay value is > 16-bits, set to max possible\n"); 1408 params.delay = U16_MAX; 1409 } else { 1410 params.delay = req->delay; 1411 } 1412 1413 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1414 if (ret) 1415 return ret; 1416 1417 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1418 1419 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1420 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1421 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1422 } else { 1423 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1424 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1425 } 1426 1427 if (ret) 1428 return ret; 1429 1430 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1431 if (!ret) { 1432 IWL_DEBUG_SCAN(mvm, 1433 "Sched scan request was sent successfully\n"); 1434 mvm->scan_status |= type; 1435 } else { 1436 /* If the scan failed, it usually means that the FW was unable 1437 * to allocate the time events. Warn on it, but maybe we 1438 * should try to send the command again with different params. 1439 */ 1440 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1441 } 1442 1443 return ret; 1444 } 1445 1446 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1447 struct iwl_rx_cmd_buffer *rxb) 1448 { 1449 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1450 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1451 u32 uid = __le32_to_cpu(notif->uid); 1452 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1453 1454 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1455 return; 1456 1457 /* if the scan is already stopping, we don't need to notify mac80211 */ 1458 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1459 struct cfg80211_scan_info info = { 1460 .aborted = aborted, 1461 .scan_start_tsf = mvm->scan_start, 1462 }; 1463 1464 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); 1465 ieee80211_scan_completed(mvm->hw, &info); 1466 mvm->scan_vif = NULL; 1467 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1468 cancel_delayed_work(&mvm->scan_timeout_dwork); 1469 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1470 ieee80211_sched_scan_stopped(mvm->hw); 1471 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1472 } 1473 1474 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1475 IWL_DEBUG_SCAN(mvm, 1476 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1477 uid, mvm->scan_uid_status[uid], 1478 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1479 "completed" : "aborted", 1480 iwl_mvm_ebs_status_str(notif->ebs_status)); 1481 IWL_DEBUG_SCAN(mvm, 1482 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1483 notif->last_schedule, notif->last_iter, 1484 __le32_to_cpu(notif->time_from_last_iter)); 1485 1486 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1487 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1488 mvm->last_ebs_successful = false; 1489 1490 mvm->scan_uid_status[uid] = 0; 1491 } 1492 1493 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1494 struct iwl_rx_cmd_buffer *rxb) 1495 { 1496 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1497 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1498 u8 buf[256]; 1499 1500 mvm->scan_start = le64_to_cpu(notif->start_tsf); 1501 1502 IWL_DEBUG_SCAN(mvm, 1503 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n", 1504 notif->status, notif->scanned_channels, 1505 iwl_mvm_dump_channel_list(notif->results, 1506 notif->scanned_channels, buf, 1507 sizeof(buf))); 1508 1509 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1510 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1511 ieee80211_sched_scan_results(mvm->hw); 1512 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1513 } 1514 1515 IWL_DEBUG_SCAN(mvm, 1516 "UMAC Scan iteration complete: scan started at %llu (TSF)\n", 1517 mvm->scan_start); 1518 } 1519 1520 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1521 { 1522 struct iwl_umac_scan_abort cmd = {}; 1523 int uid, ret; 1524 1525 lockdep_assert_held(&mvm->mutex); 1526 1527 /* We should always get a valid index here, because we already 1528 * checked that this type of scan was running in the generic 1529 * code. 1530 */ 1531 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1532 if (WARN_ON_ONCE(uid < 0)) 1533 return uid; 1534 1535 cmd.uid = cpu_to_le32(uid); 1536 1537 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1538 1539 ret = iwl_mvm_send_cmd_pdu(mvm, 1540 iwl_cmd_id(SCAN_ABORT_UMAC, 1541 IWL_ALWAYS_LONG_GROUP, 0), 1542 0, sizeof(cmd), &cmd); 1543 if (!ret) 1544 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1545 1546 return ret; 1547 } 1548 1549 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1550 { 1551 struct iwl_notification_wait wait_scan_done; 1552 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1553 SCAN_OFFLOAD_COMPLETE, }; 1554 int ret; 1555 1556 lockdep_assert_held(&mvm->mutex); 1557 1558 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1559 scan_done_notif, 1560 ARRAY_SIZE(scan_done_notif), 1561 NULL, NULL); 1562 1563 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1564 1565 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1566 ret = iwl_mvm_umac_scan_abort(mvm, type); 1567 else 1568 ret = iwl_mvm_lmac_scan_abort(mvm); 1569 1570 if (ret) { 1571 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1572 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1573 return ret; 1574 } 1575 1576 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1577 1578 return ret; 1579 } 1580 1581 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1582 { 1583 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1584 return sizeof(struct iwl_scan_req_umac) + 1585 sizeof(struct iwl_scan_channel_cfg_umac) * 1586 mvm->fw->ucode_capa.n_scan_channels + 1587 sizeof(struct iwl_scan_req_umac_tail); 1588 1589 return sizeof(struct iwl_scan_req_lmac) + 1590 sizeof(struct iwl_scan_channel_cfg_lmac) * 1591 mvm->fw->ucode_capa.n_scan_channels + 1592 sizeof(struct iwl_scan_probe_req); 1593 } 1594 1595 /* 1596 * This function is used in nic restart flow, to inform mac80211 about scans 1597 * that was aborted by restart flow or by an assert. 1598 */ 1599 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1600 { 1601 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1602 int uid, i; 1603 1604 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1605 if (uid >= 0) { 1606 struct cfg80211_scan_info info = { 1607 .aborted = true, 1608 }; 1609 1610 ieee80211_scan_completed(mvm->hw, &info); 1611 mvm->scan_uid_status[uid] = 0; 1612 } 1613 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1614 if (uid >= 0 && !mvm->restart_fw) { 1615 ieee80211_sched_scan_stopped(mvm->hw); 1616 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1617 mvm->scan_uid_status[uid] = 0; 1618 } 1619 1620 /* We shouldn't have any UIDs still set. Loop over all the 1621 * UIDs to make sure there's nothing left there and warn if 1622 * any is found. 1623 */ 1624 for (i = 0; i < mvm->max_scans; i++) { 1625 if (WARN_ONCE(mvm->scan_uid_status[i], 1626 "UMAC scan UID %d status was not cleaned\n", 1627 i)) 1628 mvm->scan_uid_status[i] = 0; 1629 } 1630 } else { 1631 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 1632 struct cfg80211_scan_info info = { 1633 .aborted = true, 1634 }; 1635 1636 ieee80211_scan_completed(mvm->hw, &info); 1637 } 1638 1639 /* Sched scan will be restarted by mac80211 in 1640 * restart_hw, so do not report if FW is about to be 1641 * restarted. 1642 */ 1643 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1644 !mvm->restart_fw) { 1645 ieee80211_sched_scan_stopped(mvm->hw); 1646 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1647 } 1648 } 1649 } 1650 1651 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1652 { 1653 int ret; 1654 1655 if (!(mvm->scan_status & type)) 1656 return 0; 1657 1658 if (iwl_mvm_is_radio_killed(mvm)) { 1659 ret = 0; 1660 goto out; 1661 } 1662 1663 ret = iwl_mvm_scan_stop_wait(mvm, type); 1664 if (!ret) 1665 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 1666 out: 1667 /* Clear the scan status so the next scan requests will 1668 * succeed and mark the scan as stopping, so that the Rx 1669 * handler doesn't do anything, as the scan was stopped from 1670 * above. 1671 */ 1672 mvm->scan_status &= ~type; 1673 1674 if (type == IWL_MVM_SCAN_REGULAR) { 1675 /* Since the rx handler won't do anything now, we have 1676 * to release the scan reference here. 1677 */ 1678 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1679 cancel_delayed_work(&mvm->scan_timeout_dwork); 1680 if (notify) { 1681 struct cfg80211_scan_info info = { 1682 .aborted = true, 1683 }; 1684 1685 ieee80211_scan_completed(mvm->hw, &info); 1686 } 1687 } else if (notify) { 1688 ieee80211_sched_scan_stopped(mvm->hw); 1689 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1690 } 1691 1692 return ret; 1693 } 1694