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 struct cfg80211_scan_info info = { 395 .aborted = aborted, 396 }; 397 398 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 399 aborted ? "aborted" : "completed", 400 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 401 402 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 403 ieee80211_scan_completed(mvm->hw, &info); 404 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 405 cancel_delayed_work(&mvm->scan_timeout_dwork); 406 } else { 407 IWL_ERR(mvm, 408 "got scan complete notification but no scan is running\n"); 409 } 410 411 mvm->last_ebs_successful = 412 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 413 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 414 } 415 416 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 417 { 418 int i; 419 420 for (i = 0; i < PROBE_OPTION_MAX; i++) { 421 if (!ssid_list[i].len) 422 break; 423 if (ssid_list[i].len == ssid_len && 424 !memcmp(ssid_list->ssid, ssid, ssid_len)) 425 return i; 426 } 427 return -1; 428 } 429 430 /* We insert the SSIDs in an inverted order, because the FW will 431 * invert it back. 432 */ 433 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 434 struct iwl_ssid_ie *ssids, 435 u32 *ssid_bitmap) 436 { 437 int i, j; 438 int index; 439 440 /* 441 * copy SSIDs from match list. 442 * iwl_config_sched_scan_profiles() uses the order of these ssids to 443 * config match list. 444 */ 445 for (i = 0, j = params->n_match_sets - 1; 446 j >= 0 && i < PROBE_OPTION_MAX; 447 i++, j--) { 448 /* skip empty SSID matchsets */ 449 if (!params->match_sets[j].ssid.ssid_len) 450 continue; 451 ssids[i].id = WLAN_EID_SSID; 452 ssids[i].len = params->match_sets[j].ssid.ssid_len; 453 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 454 ssids[i].len); 455 } 456 457 /* add SSIDs from scan SSID list */ 458 *ssid_bitmap = 0; 459 for (j = params->n_ssids - 1; 460 j >= 0 && i < PROBE_OPTION_MAX; 461 i++, j--) { 462 index = iwl_ssid_exist(params->ssids[j].ssid, 463 params->ssids[j].ssid_len, 464 ssids); 465 if (index < 0) { 466 ssids[i].id = WLAN_EID_SSID; 467 ssids[i].len = params->ssids[j].ssid_len; 468 memcpy(ssids[i].ssid, params->ssids[j].ssid, 469 ssids[i].len); 470 *ssid_bitmap |= BIT(i); 471 } else { 472 *ssid_bitmap |= BIT(index); 473 } 474 } 475 } 476 477 static int 478 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 479 struct cfg80211_sched_scan_request *req) 480 { 481 struct iwl_scan_offload_profile *profile; 482 struct iwl_scan_offload_profile_cfg *profile_cfg; 483 struct iwl_scan_offload_blacklist *blacklist; 484 struct iwl_host_cmd cmd = { 485 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 486 .len[1] = sizeof(*profile_cfg), 487 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 488 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 489 }; 490 int blacklist_len; 491 int i; 492 int ret; 493 494 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 495 return -EIO; 496 497 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 498 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 499 else 500 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 501 502 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); 503 if (!blacklist) 504 return -ENOMEM; 505 506 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 507 if (!profile_cfg) { 508 ret = -ENOMEM; 509 goto free_blacklist; 510 } 511 512 cmd.data[0] = blacklist; 513 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 514 cmd.data[1] = profile_cfg; 515 516 /* No blacklist configuration */ 517 518 profile_cfg->num_profiles = req->n_match_sets; 519 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 520 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 521 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 522 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 523 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 524 525 for (i = 0; i < req->n_match_sets; i++) { 526 profile = &profile_cfg->profiles[i]; 527 profile->ssid_index = i; 528 /* Support any cipher and auth algorithm */ 529 profile->unicast_cipher = 0xff; 530 profile->auth_alg = 0xff; 531 profile->network_type = IWL_NETWORK_TYPE_ANY; 532 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 533 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 534 } 535 536 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 537 538 ret = iwl_mvm_send_cmd(mvm, &cmd); 539 kfree(profile_cfg); 540 free_blacklist: 541 kfree(blacklist); 542 543 return ret; 544 } 545 546 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 547 struct cfg80211_sched_scan_request *req) 548 { 549 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 550 IWL_DEBUG_SCAN(mvm, 551 "Sending scheduled scan with filtering, n_match_sets %d\n", 552 req->n_match_sets); 553 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 554 return false; 555 } 556 557 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 558 559 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 560 return true; 561 } 562 563 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 564 { 565 int ret; 566 struct iwl_host_cmd cmd = { 567 .id = SCAN_OFFLOAD_ABORT_CMD, 568 }; 569 u32 status; 570 571 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 572 if (ret) 573 return ret; 574 575 if (status != CAN_ABORT_STATUS) { 576 /* 577 * The scan abort will return 1 for success or 578 * 2 for "failure". A failure condition can be 579 * due to simply not being in an active scan which 580 * can occur if we send the scan abort before the 581 * microcode has notified us that a scan is completed. 582 */ 583 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 584 ret = -ENOENT; 585 } 586 587 return ret; 588 } 589 590 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 591 struct iwl_scan_req_tx_cmd *tx_cmd, 592 bool no_cck) 593 { 594 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 595 TX_CMD_FLG_BT_DIS); 596 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 597 NL80211_BAND_2GHZ, 598 no_cck); 599 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 600 601 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 602 TX_CMD_FLG_BT_DIS); 603 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 604 NL80211_BAND_5GHZ, 605 no_cck); 606 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 607 } 608 609 static void 610 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 611 struct ieee80211_channel **channels, 612 int n_channels, u32 ssid_bitmap, 613 struct iwl_scan_req_lmac *cmd) 614 { 615 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 616 int i; 617 618 for (i = 0; i < n_channels; i++) { 619 channel_cfg[i].channel_num = 620 cpu_to_le16(channels[i]->hw_value); 621 channel_cfg[i].iter_count = cpu_to_le16(1); 622 channel_cfg[i].iter_interval = 0; 623 channel_cfg[i].flags = 624 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 625 ssid_bitmap); 626 } 627 } 628 629 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 630 size_t len, u8 *const pos) 631 { 632 static const u8 before_ds_params[] = { 633 WLAN_EID_SSID, 634 WLAN_EID_SUPP_RATES, 635 WLAN_EID_REQUEST, 636 WLAN_EID_EXT_SUPP_RATES, 637 }; 638 size_t offs; 639 u8 *newpos = pos; 640 641 if (!iwl_mvm_rrm_scan_needed(mvm)) { 642 memcpy(newpos, ies, len); 643 return newpos + len; 644 } 645 646 offs = ieee80211_ie_split(ies, len, 647 before_ds_params, 648 ARRAY_SIZE(before_ds_params), 649 0); 650 651 memcpy(newpos, ies, offs); 652 newpos += offs; 653 654 /* Add a placeholder for DS Parameter Set element */ 655 *newpos++ = WLAN_EID_DS_PARAMS; 656 *newpos++ = 1; 657 *newpos++ = 0; 658 659 memcpy(newpos, ies + offs, len - offs); 660 newpos += len - offs; 661 662 return newpos; 663 } 664 665 static void 666 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 667 struct ieee80211_scan_ies *ies, 668 struct iwl_mvm_scan_params *params) 669 { 670 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 671 u8 *pos, *newpos; 672 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 673 params->mac_addr : NULL; 674 675 /* 676 * Unfortunately, right now the offload scan doesn't support randomising 677 * within the firmware, so until the firmware API is ready we implement 678 * it in the driver. This means that the scan iterations won't really be 679 * random, only when it's restarted, but at least that helps a bit. 680 */ 681 if (mac_addr) 682 get_random_mask_addr(frame->sa, mac_addr, 683 params->mac_addr_mask); 684 else 685 memcpy(frame->sa, vif->addr, ETH_ALEN); 686 687 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 688 eth_broadcast_addr(frame->da); 689 eth_broadcast_addr(frame->bssid); 690 frame->seq_ctrl = 0; 691 692 pos = frame->u.probe_req.variable; 693 *pos++ = WLAN_EID_SSID; 694 *pos++ = 0; 695 696 params->preq.mac_header.offset = 0; 697 params->preq.mac_header.len = cpu_to_le16(24 + 2); 698 699 /* Insert ds parameter set element on 2.4 GHz band */ 700 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 701 ies->ies[NL80211_BAND_2GHZ], 702 ies->len[NL80211_BAND_2GHZ], 703 pos); 704 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 705 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 706 pos = newpos; 707 708 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 709 ies->len[NL80211_BAND_5GHZ]); 710 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 711 params->preq.band_data[1].len = 712 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 713 pos += ies->len[NL80211_BAND_5GHZ]; 714 715 memcpy(pos, ies->common_ies, ies->common_ie_len); 716 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 717 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 718 } 719 720 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm, 721 enum iwl_scan_priority_ext prio) 722 { 723 if (fw_has_api(&mvm->fw->ucode_capa, 724 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY)) 725 return cpu_to_le32(prio); 726 727 if (prio <= IWL_SCAN_PRIORITY_EXT_2) 728 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW); 729 730 if (prio <= IWL_SCAN_PRIORITY_EXT_4) 731 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM); 732 733 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); 734 } 735 736 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 737 struct iwl_scan_req_lmac *cmd, 738 struct iwl_mvm_scan_params *params) 739 { 740 cmd->active_dwell = scan_timing[params->type].dwell_active; 741 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 742 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 743 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 744 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 745 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 746 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 747 } 748 749 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 750 struct ieee80211_scan_ies *ies, 751 int n_channels) 752 { 753 return ((n_ssids <= PROBE_OPTION_MAX) && 754 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 755 (ies->common_ie_len + 756 ies->len[NL80211_BAND_2GHZ] + 757 ies->len[NL80211_BAND_5GHZ] <= 758 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 759 } 760 761 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 762 struct ieee80211_vif *vif) 763 { 764 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 765 766 /* We can only use EBS if: 767 * 1. the feature is supported; 768 * 2. the last EBS was successful; 769 * 3. if only single scan, the single scan EBS API is supported; 770 * 4. it's not a p2p find operation. 771 */ 772 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 773 mvm->last_ebs_successful && 774 vif->type != NL80211_IFTYPE_P2P_DEVICE); 775 } 776 777 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 778 { 779 return params->n_scan_plans == 1 && 780 params->scan_plans[0].iterations == 1; 781 } 782 783 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 784 struct iwl_mvm_scan_params *params, 785 struct ieee80211_vif *vif) 786 { 787 int flags = 0; 788 789 if (params->n_ssids == 0) 790 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 791 792 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 793 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 794 795 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 796 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 797 798 if (iwl_mvm_rrm_scan_needed(mvm)) 799 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 800 801 if (params->pass_all) 802 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 803 else 804 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 805 806 #ifdef CONFIG_IWLWIFI_DEBUGFS 807 if (mvm->scan_iter_notif_enabled) 808 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 809 #endif 810 811 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 812 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 813 814 if (iwl_mvm_is_regular_scan(params) && 815 vif->type != NL80211_IFTYPE_P2P_DEVICE && 816 params->type != IWL_SCAN_TYPE_FRAGMENTED) 817 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 818 819 return flags; 820 } 821 822 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 823 struct iwl_mvm_scan_params *params) 824 { 825 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 826 struct iwl_scan_probe_req *preq = 827 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 828 mvm->fw->ucode_capa.n_scan_channels); 829 u32 ssid_bitmap = 0; 830 int i; 831 832 lockdep_assert_held(&mvm->mutex); 833 834 memset(cmd, 0, ksize(cmd)); 835 836 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 837 return -EINVAL; 838 839 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 840 841 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 842 cmd->iter_num = cpu_to_le32(1); 843 cmd->n_channels = (u8)params->n_channels; 844 845 cmd->delay = cpu_to_le32(params->delay); 846 847 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 848 vif)); 849 850 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 851 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 852 MAC_FILTER_IN_BEACON); 853 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 854 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 855 856 /* this API uses bits 1-20 instead of 0-19 */ 857 ssid_bitmap <<= 1; 858 859 for (i = 0; i < params->n_scan_plans; i++) { 860 struct cfg80211_sched_scan_plan *scan_plan = 861 ¶ms->scan_plans[i]; 862 863 cmd->schedule[i].delay = 864 cpu_to_le16(scan_plan->interval); 865 cmd->schedule[i].iterations = scan_plan->iterations; 866 cmd->schedule[i].full_scan_mul = 1; 867 } 868 869 /* 870 * If the number of iterations of the last scan plan is set to 871 * zero, it should run infinitely. However, this is not always the case. 872 * For example, when regular scan is requested the driver sets one scan 873 * plan with one iteration. 874 */ 875 if (!cmd->schedule[i - 1].iterations) 876 cmd->schedule[i - 1].iterations = 0xff; 877 878 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 879 cmd->channel_opt[0].flags = 880 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 881 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 882 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 883 cmd->channel_opt[0].non_ebs_ratio = 884 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 885 cmd->channel_opt[1].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[1].non_ebs_ratio = 890 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 891 } 892 893 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 894 params->n_channels, ssid_bitmap, cmd); 895 896 *preq = params->preq; 897 898 return 0; 899 } 900 901 static int rate_to_scan_rate_flag(unsigned int rate) 902 { 903 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 904 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 905 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 906 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 907 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 908 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 909 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 910 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 911 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 912 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 913 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 914 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 915 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 916 }; 917 918 return rate_to_scan_rate[rate]; 919 } 920 921 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 922 { 923 struct ieee80211_supported_band *band; 924 unsigned int rates = 0; 925 int i; 926 927 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 928 for (i = 0; i < band->n_bitrates; i++) 929 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 930 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 931 for (i = 0; i < band->n_bitrates; i++) 932 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 933 934 /* Set both basic rates and supported rates */ 935 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 936 937 return cpu_to_le32(rates); 938 } 939 940 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 941 { 942 struct iwl_scan_config *scan_config; 943 struct ieee80211_supported_band *band; 944 int num_channels = 945 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 946 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 947 int ret, i, j = 0, cmd_size; 948 struct iwl_host_cmd cmd = { 949 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 950 }; 951 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 952 953 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 954 return -ENOBUFS; 955 956 if (type == mvm->scan_type) { 957 IWL_DEBUG_SCAN(mvm, 958 "Ignoring UMAC scan config of the same type\n"); 959 return 0; 960 } 961 962 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels; 963 964 scan_config = kzalloc(cmd_size, GFP_KERNEL); 965 if (!scan_config) 966 return -ENOMEM; 967 968 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE | 969 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 970 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 971 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 972 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 973 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 974 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 975 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 976 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| 977 SCAN_CONFIG_N_CHANNELS(num_channels) | 978 (type == IWL_SCAN_TYPE_FRAGMENTED ? 979 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 980 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED)); 981 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 982 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 983 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm); 984 scan_config->out_of_channel_time = 985 cpu_to_le32(scan_timing[type].max_out_time); 986 scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 987 scan_config->dwell_active = scan_timing[type].dwell_active; 988 scan_config->dwell_passive = scan_timing[type].dwell_passive; 989 scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented; 990 scan_config->dwell_extended = scan_timing[type].dwell_extended; 991 992 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 993 994 scan_config->bcast_sta_id = mvm->aux_sta.sta_id; 995 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS | 996 IWL_CHANNEL_FLAG_ACCURATE_EBS | 997 IWL_CHANNEL_FLAG_EBS_ADD | 998 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 999 1000 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1001 for (i = 0; i < band->n_channels; i++, j++) 1002 scan_config->channel_array[j] = band->channels[i].hw_value; 1003 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1004 for (i = 0; i < band->n_channels; i++, j++) 1005 scan_config->channel_array[j] = band->channels[i].hw_value; 1006 1007 cmd.data[0] = scan_config; 1008 cmd.len[0] = cmd_size; 1009 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1010 1011 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1012 1013 ret = iwl_mvm_send_cmd(mvm, &cmd); 1014 if (!ret) 1015 mvm->scan_type = type; 1016 1017 kfree(scan_config); 1018 return ret; 1019 } 1020 1021 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1022 { 1023 int i; 1024 1025 for (i = 0; i < mvm->max_scans; i++) 1026 if (mvm->scan_uid_status[i] == status) 1027 return i; 1028 1029 return -ENOENT; 1030 } 1031 1032 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1033 struct iwl_scan_req_umac *cmd, 1034 struct iwl_mvm_scan_params *params) 1035 { 1036 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 1037 cmd->active_dwell = scan_timing[params->type].dwell_active; 1038 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 1039 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 1040 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 1041 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 1042 cmd->scan_priority = 1043 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 1044 1045 if (iwl_mvm_is_regular_scan(params)) 1046 cmd->ooc_priority = 1047 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 1048 else 1049 cmd->ooc_priority = 1050 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2); 1051 } 1052 1053 static void 1054 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1055 struct ieee80211_channel **channels, 1056 int n_channels, u32 ssid_bitmap, 1057 struct iwl_scan_req_umac *cmd) 1058 { 1059 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data; 1060 int i; 1061 1062 for (i = 0; i < n_channels; i++) { 1063 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1064 channel_cfg[i].channel_num = channels[i]->hw_value; 1065 channel_cfg[i].iter_count = 1; 1066 channel_cfg[i].iter_interval = 0; 1067 } 1068 } 1069 1070 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1071 struct iwl_mvm_scan_params *params, 1072 struct ieee80211_vif *vif) 1073 { 1074 int flags = 0; 1075 1076 if (params->n_ssids == 0) 1077 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1078 1079 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1080 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1081 1082 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 1083 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1084 1085 if (iwl_mvm_rrm_scan_needed(mvm)) 1086 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1087 1088 if (params->pass_all) 1089 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1090 else 1091 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1092 1093 if (!iwl_mvm_is_regular_scan(params)) 1094 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1095 1096 #ifdef CONFIG_IWLWIFI_DEBUGFS 1097 if (mvm->scan_iter_notif_enabled) 1098 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1099 #endif 1100 1101 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1102 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1103 1104 if (iwl_mvm_is_regular_scan(params) && 1105 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1106 params->type != IWL_SCAN_TYPE_FRAGMENTED) 1107 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1108 1109 return flags; 1110 } 1111 1112 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1113 struct iwl_mvm_scan_params *params, 1114 int type) 1115 { 1116 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1117 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + 1118 sizeof(struct iwl_scan_channel_cfg_umac) * 1119 mvm->fw->ucode_capa.n_scan_channels; 1120 int uid, i; 1121 u32 ssid_bitmap = 0; 1122 1123 lockdep_assert_held(&mvm->mutex); 1124 1125 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1126 return -EINVAL; 1127 1128 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1129 if (uid < 0) 1130 return uid; 1131 1132 memset(cmd, 0, ksize(cmd)); 1133 1134 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1135 1136 mvm->scan_uid_status[uid] = type; 1137 1138 cmd->uid = cpu_to_le32(uid); 1139 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params, 1140 vif)); 1141 1142 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1143 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1144 1145 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1146 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1147 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1148 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1149 1150 cmd->n_channels = params->n_channels; 1151 1152 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1153 1154 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1155 params->n_channels, ssid_bitmap, cmd); 1156 1157 for (i = 0; i < params->n_scan_plans; i++) { 1158 struct cfg80211_sched_scan_plan *scan_plan = 1159 ¶ms->scan_plans[i]; 1160 1161 sec_part->schedule[i].iter_count = scan_plan->iterations; 1162 sec_part->schedule[i].interval = 1163 cpu_to_le16(scan_plan->interval); 1164 } 1165 1166 /* 1167 * If the number of iterations of the last scan plan is set to 1168 * zero, it should run infinitely. However, this is not always the case. 1169 * For example, when regular scan is requested the driver sets one scan 1170 * plan with one iteration. 1171 */ 1172 if (!sec_part->schedule[i - 1].iter_count) 1173 sec_part->schedule[i - 1].iter_count = 0xff; 1174 1175 sec_part->delay = cpu_to_le16(params->delay); 1176 sec_part->preq = params->preq; 1177 1178 return 0; 1179 } 1180 1181 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1182 { 1183 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1184 } 1185 1186 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1187 { 1188 /* This looks a bit arbitrary, but the idea is that if we run 1189 * out of possible simultaneous scans and the userspace is 1190 * trying to run a scan type that is already running, we 1191 * return -EBUSY. But if the userspace wants to start a 1192 * different type of scan, we stop the opposite type to make 1193 * space for the new request. The reason is backwards 1194 * compatibility with old wpa_supplicant that wouldn't stop a 1195 * scheduled scan before starting a normal scan. 1196 */ 1197 1198 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1199 return 0; 1200 1201 /* Use a switch, even though this is a bitmask, so that more 1202 * than one bits set will fall in default and we will warn. 1203 */ 1204 switch (type) { 1205 case IWL_MVM_SCAN_REGULAR: 1206 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1207 return -EBUSY; 1208 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1209 case IWL_MVM_SCAN_SCHED: 1210 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1211 return -EBUSY; 1212 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1213 case IWL_MVM_SCAN_NETDETECT: 1214 /* No need to stop anything for net-detect since the 1215 * firmware is restarted anyway. This way, any sched 1216 * scans that were running will be restarted when we 1217 * resume. 1218 */ 1219 return 0; 1220 default: 1221 WARN_ON(1); 1222 break; 1223 } 1224 1225 return -EIO; 1226 } 1227 1228 #define SCAN_TIMEOUT 20000 1229 1230 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1231 { 1232 struct delayed_work *delayed_work = to_delayed_work(work); 1233 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1234 scan_timeout_dwork); 1235 1236 IWL_ERR(mvm, "regular scan timed out\n"); 1237 1238 iwl_force_nmi(mvm->trans); 1239 } 1240 1241 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1242 struct cfg80211_scan_request *req, 1243 struct ieee80211_scan_ies *ies) 1244 { 1245 struct iwl_host_cmd hcmd = { 1246 .len = { iwl_mvm_scan_size(mvm), }, 1247 .data = { mvm->scan_cmd, }, 1248 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1249 }; 1250 struct iwl_mvm_scan_params params = {}; 1251 int ret; 1252 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1253 1254 lockdep_assert_held(&mvm->mutex); 1255 1256 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1257 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1258 return -EBUSY; 1259 } 1260 1261 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1262 if (ret) 1263 return ret; 1264 1265 /* we should have failed registration if scan_cmd was NULL */ 1266 if (WARN_ON(!mvm->scan_cmd)) 1267 return -ENOMEM; 1268 1269 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1270 return -ENOBUFS; 1271 1272 params.n_ssids = req->n_ssids; 1273 params.flags = req->flags; 1274 params.n_channels = req->n_channels; 1275 params.delay = 0; 1276 params.ssids = req->ssids; 1277 params.channels = req->channels; 1278 params.mac_addr = req->mac_addr; 1279 params.mac_addr_mask = req->mac_addr_mask; 1280 params.no_cck = req->no_cck; 1281 params.pass_all = true; 1282 params.n_match_sets = 0; 1283 params.match_sets = NULL; 1284 1285 params.scan_plans = &scan_plan; 1286 params.n_scan_plans = 1; 1287 1288 params.type = 1289 iwl_mvm_get_scan_type(mvm, 1290 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1291 1292 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1293 1294 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1295 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1296 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1297 IWL_MVM_SCAN_REGULAR); 1298 } else { 1299 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1300 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1301 } 1302 1303 if (ret) 1304 return ret; 1305 1306 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1307 if (ret) { 1308 /* If the scan failed, it usually means that the FW was unable 1309 * to allocate the time events. Warn on it, but maybe we 1310 * should try to send the command again with different params. 1311 */ 1312 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1313 return ret; 1314 } 1315 1316 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1317 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1318 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1319 1320 queue_delayed_work(system_wq, &mvm->scan_timeout_dwork, 1321 msecs_to_jiffies(SCAN_TIMEOUT)); 1322 1323 return 0; 1324 } 1325 1326 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1327 struct ieee80211_vif *vif, 1328 struct cfg80211_sched_scan_request *req, 1329 struct ieee80211_scan_ies *ies, 1330 int type) 1331 { 1332 struct iwl_host_cmd hcmd = { 1333 .len = { iwl_mvm_scan_size(mvm), }, 1334 .data = { mvm->scan_cmd, }, 1335 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1336 }; 1337 struct iwl_mvm_scan_params params = {}; 1338 int ret; 1339 1340 lockdep_assert_held(&mvm->mutex); 1341 1342 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1343 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1344 return -EBUSY; 1345 } 1346 1347 ret = iwl_mvm_check_running_scans(mvm, type); 1348 if (ret) 1349 return ret; 1350 1351 /* we should have failed registration if scan_cmd was NULL */ 1352 if (WARN_ON(!mvm->scan_cmd)) 1353 return -ENOMEM; 1354 1355 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1356 return -ENOBUFS; 1357 1358 params.n_ssids = req->n_ssids; 1359 params.flags = req->flags; 1360 params.n_channels = req->n_channels; 1361 params.ssids = req->ssids; 1362 params.channels = req->channels; 1363 params.mac_addr = req->mac_addr; 1364 params.mac_addr_mask = req->mac_addr_mask; 1365 params.no_cck = false; 1366 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1367 params.n_match_sets = req->n_match_sets; 1368 params.match_sets = req->match_sets; 1369 if (!req->n_scan_plans) 1370 return -EINVAL; 1371 1372 params.n_scan_plans = req->n_scan_plans; 1373 params.scan_plans = req->scan_plans; 1374 1375 params.type = 1376 iwl_mvm_get_scan_type(mvm, 1377 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1378 1379 /* In theory, LMAC scans can handle a 32-bit delay, but since 1380 * waiting for over 18 hours to start the scan is a bit silly 1381 * and to keep it aligned with UMAC scans (which only support 1382 * 16-bit delays), trim it down to 16-bits. 1383 */ 1384 if (req->delay > U16_MAX) { 1385 IWL_DEBUG_SCAN(mvm, 1386 "delay value is > 16-bits, set to max possible\n"); 1387 params.delay = U16_MAX; 1388 } else { 1389 params.delay = req->delay; 1390 } 1391 1392 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1393 if (ret) 1394 return ret; 1395 1396 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1397 1398 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1399 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1400 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1401 } else { 1402 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1403 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1404 } 1405 1406 if (ret) 1407 return ret; 1408 1409 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1410 if (!ret) { 1411 IWL_DEBUG_SCAN(mvm, 1412 "Sched scan request was sent successfully\n"); 1413 mvm->scan_status |= type; 1414 } else { 1415 /* If the scan failed, it usually means that the FW was unable 1416 * to allocate the time events. Warn on it, but maybe we 1417 * should try to send the command again with different params. 1418 */ 1419 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1420 } 1421 1422 return ret; 1423 } 1424 1425 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1426 struct iwl_rx_cmd_buffer *rxb) 1427 { 1428 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1429 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1430 u32 uid = __le32_to_cpu(notif->uid); 1431 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1432 1433 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1434 return; 1435 1436 /* if the scan is already stopping, we don't need to notify mac80211 */ 1437 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1438 struct cfg80211_scan_info info = { 1439 .aborted = aborted, 1440 }; 1441 1442 ieee80211_scan_completed(mvm->hw, &info); 1443 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1444 cancel_delayed_work(&mvm->scan_timeout_dwork); 1445 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1446 ieee80211_sched_scan_stopped(mvm->hw); 1447 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1448 } 1449 1450 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1451 IWL_DEBUG_SCAN(mvm, 1452 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1453 uid, mvm->scan_uid_status[uid], 1454 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1455 "completed" : "aborted", 1456 iwl_mvm_ebs_status_str(notif->ebs_status)); 1457 IWL_DEBUG_SCAN(mvm, 1458 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1459 notif->last_schedule, notif->last_iter, 1460 __le32_to_cpu(notif->time_from_last_iter)); 1461 1462 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1463 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1464 mvm->last_ebs_successful = false; 1465 1466 mvm->scan_uid_status[uid] = 0; 1467 } 1468 1469 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1470 struct iwl_rx_cmd_buffer *rxb) 1471 { 1472 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1473 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1474 u8 buf[256]; 1475 1476 IWL_DEBUG_SCAN(mvm, 1477 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n", 1478 notif->status, notif->scanned_channels, 1479 iwl_mvm_dump_channel_list(notif->results, 1480 notif->scanned_channels, buf, 1481 sizeof(buf))); 1482 1483 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1484 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1485 ieee80211_sched_scan_results(mvm->hw); 1486 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1487 } 1488 } 1489 1490 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1491 { 1492 struct iwl_umac_scan_abort cmd = {}; 1493 int uid, ret; 1494 1495 lockdep_assert_held(&mvm->mutex); 1496 1497 /* We should always get a valid index here, because we already 1498 * checked that this type of scan was running in the generic 1499 * code. 1500 */ 1501 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1502 if (WARN_ON_ONCE(uid < 0)) 1503 return uid; 1504 1505 cmd.uid = cpu_to_le32(uid); 1506 1507 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1508 1509 ret = iwl_mvm_send_cmd_pdu(mvm, 1510 iwl_cmd_id(SCAN_ABORT_UMAC, 1511 IWL_ALWAYS_LONG_GROUP, 0), 1512 0, sizeof(cmd), &cmd); 1513 if (!ret) 1514 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1515 1516 return ret; 1517 } 1518 1519 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1520 { 1521 struct iwl_notification_wait wait_scan_done; 1522 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1523 SCAN_OFFLOAD_COMPLETE, }; 1524 int ret; 1525 1526 lockdep_assert_held(&mvm->mutex); 1527 1528 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1529 scan_done_notif, 1530 ARRAY_SIZE(scan_done_notif), 1531 NULL, NULL); 1532 1533 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1534 1535 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1536 ret = iwl_mvm_umac_scan_abort(mvm, type); 1537 else 1538 ret = iwl_mvm_lmac_scan_abort(mvm); 1539 1540 if (ret) { 1541 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1542 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1543 return ret; 1544 } 1545 1546 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1547 1548 return ret; 1549 } 1550 1551 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1552 { 1553 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1554 return sizeof(struct iwl_scan_req_umac) + 1555 sizeof(struct iwl_scan_channel_cfg_umac) * 1556 mvm->fw->ucode_capa.n_scan_channels + 1557 sizeof(struct iwl_scan_req_umac_tail); 1558 1559 return sizeof(struct iwl_scan_req_lmac) + 1560 sizeof(struct iwl_scan_channel_cfg_lmac) * 1561 mvm->fw->ucode_capa.n_scan_channels + 1562 sizeof(struct iwl_scan_probe_req); 1563 } 1564 1565 /* 1566 * This function is used in nic restart flow, to inform mac80211 about scans 1567 * that was aborted by restart flow or by an assert. 1568 */ 1569 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1570 { 1571 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1572 int uid, i; 1573 1574 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1575 if (uid >= 0) { 1576 struct cfg80211_scan_info info = { 1577 .aborted = true, 1578 }; 1579 1580 ieee80211_scan_completed(mvm->hw, &info); 1581 mvm->scan_uid_status[uid] = 0; 1582 } 1583 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1584 if (uid >= 0 && !mvm->restart_fw) { 1585 ieee80211_sched_scan_stopped(mvm->hw); 1586 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1587 mvm->scan_uid_status[uid] = 0; 1588 } 1589 1590 /* We shouldn't have any UIDs still set. Loop over all the 1591 * UIDs to make sure there's nothing left there and warn if 1592 * any is found. 1593 */ 1594 for (i = 0; i < mvm->max_scans; i++) { 1595 if (WARN_ONCE(mvm->scan_uid_status[i], 1596 "UMAC scan UID %d status was not cleaned\n", 1597 i)) 1598 mvm->scan_uid_status[i] = 0; 1599 } 1600 } else { 1601 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 1602 struct cfg80211_scan_info info = { 1603 .aborted = true, 1604 }; 1605 1606 ieee80211_scan_completed(mvm->hw, &info); 1607 } 1608 1609 /* Sched scan will be restarted by mac80211 in 1610 * restart_hw, so do not report if FW is about to be 1611 * restarted. 1612 */ 1613 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1614 !mvm->restart_fw) { 1615 ieee80211_sched_scan_stopped(mvm->hw); 1616 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1617 } 1618 } 1619 } 1620 1621 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1622 { 1623 int ret; 1624 1625 if (!(mvm->scan_status & type)) 1626 return 0; 1627 1628 if (iwl_mvm_is_radio_killed(mvm)) { 1629 ret = 0; 1630 goto out; 1631 } 1632 1633 ret = iwl_mvm_scan_stop_wait(mvm, type); 1634 if (!ret) 1635 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 1636 out: 1637 /* Clear the scan status so the next scan requests will 1638 * succeed and mark the scan as stopping, so that the Rx 1639 * handler doesn't do anything, as the scan was stopped from 1640 * above. 1641 */ 1642 mvm->scan_status &= ~type; 1643 1644 if (type == IWL_MVM_SCAN_REGULAR) { 1645 /* Since the rx handler won't do anything now, we have 1646 * to release the scan reference here. 1647 */ 1648 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1649 cancel_delayed_work(&mvm->scan_timeout_dwork); 1650 if (notify) { 1651 struct cfg80211_scan_info info = { 1652 .aborted = true, 1653 }; 1654 1655 ieee80211_scan_completed(mvm->hw, &info); 1656 } 1657 } else if (notify) { 1658 ieee80211_sched_scan_stopped(mvm->hw); 1659 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1660 } 1661 1662 return ret; 1663 } 1664