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 - 2017 Intel Deutschland GmbH 11 * Copyright(c) 2018 Intel Corporation 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of version 2 of the GNU General Public License as 15 * published by the Free Software Foundation. 16 * 17 * This program is distributed in the hope that it will be useful, but 18 * WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 20 * General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program 24 * 25 * The full GNU General Public License is included in this distribution 26 * in the file called COPYING. 27 * 28 * Contact Information: 29 * Intel Linux Wireless <linuxwifi@intel.com> 30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 31 * 32 * BSD LICENSE 33 * 34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 35 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 36 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 37 * Copyright(c) 2018 Intel Corporation 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 #define IWL_SCAN_DWELL_ACTIVE 10 79 #define IWL_SCAN_DWELL_PASSIVE 110 80 #define IWL_SCAN_DWELL_FRAGMENTED 44 81 #define IWL_SCAN_DWELL_EXTENDED 90 82 #define IWL_SCAN_NUM_OF_FRAGS 3 83 84 85 /* adaptive dwell max budget time [TU] for full scan */ 86 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300 87 /* adaptive dwell max budget time [TU] for directed scan */ 88 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100 89 /* adaptive dwell default APs number */ 90 #define IWL_SCAN_ADWELL_DEFAULT_N_APS 2 91 /* adaptive dwell default APs number in social channels (1, 6, 11) */ 92 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10 93 94 struct iwl_mvm_scan_timing_params { 95 u32 suspend_time; 96 u32 max_out_time; 97 }; 98 99 static struct iwl_mvm_scan_timing_params scan_timing[] = { 100 [IWL_SCAN_TYPE_UNASSOC] = { 101 .suspend_time = 0, 102 .max_out_time = 0, 103 }, 104 [IWL_SCAN_TYPE_WILD] = { 105 .suspend_time = 30, 106 .max_out_time = 120, 107 }, 108 [IWL_SCAN_TYPE_MILD] = { 109 .suspend_time = 120, 110 .max_out_time = 120, 111 }, 112 [IWL_SCAN_TYPE_FRAGMENTED] = { 113 .suspend_time = 95, 114 .max_out_time = 44, 115 }, 116 }; 117 118 struct iwl_mvm_scan_params { 119 /* For CDB this is low band scan type, for non-CDB - type. */ 120 enum iwl_mvm_scan_type type; 121 enum iwl_mvm_scan_type hb_type; 122 u32 n_channels; 123 u16 delay; 124 int n_ssids; 125 struct cfg80211_ssid *ssids; 126 struct ieee80211_channel **channels; 127 u32 flags; 128 u8 *mac_addr; 129 u8 *mac_addr_mask; 130 bool no_cck; 131 bool pass_all; 132 int n_match_sets; 133 struct iwl_scan_probe_req preq; 134 struct cfg80211_match_set *match_sets; 135 int n_scan_plans; 136 struct cfg80211_sched_scan_plan *scan_plans; 137 u32 measurement_dwell; 138 }; 139 140 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm) 141 { 142 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 143 144 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 145 return (void *)&cmd->v8.data; 146 147 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 148 return (void *)&cmd->v7.data; 149 150 if (iwl_mvm_cdb_scan_api(mvm)) 151 return (void *)&cmd->v6.data; 152 153 return (void *)&cmd->v1.data; 154 } 155 156 static inline struct iwl_scan_umac_chan_param * 157 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm) 158 { 159 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 160 161 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 162 return &cmd->v8.channel; 163 164 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 165 return &cmd->v7.channel; 166 167 if (iwl_mvm_cdb_scan_api(mvm)) 168 return &cmd->v6.channel; 169 170 return &cmd->v1.channel; 171 } 172 173 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 174 { 175 if (mvm->scan_rx_ant != ANT_NONE) 176 return mvm->scan_rx_ant; 177 return iwl_mvm_get_valid_rx_ant(mvm); 178 } 179 180 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 181 { 182 u16 rx_chain; 183 u8 rx_ant; 184 185 rx_ant = iwl_mvm_scan_rx_ant(mvm); 186 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 187 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 188 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 189 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 190 return cpu_to_le16(rx_chain); 191 } 192 193 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band) 194 { 195 if (band == NL80211_BAND_2GHZ) 196 return cpu_to_le32(PHY_BAND_24); 197 else 198 return cpu_to_le32(PHY_BAND_5); 199 } 200 201 static inline __le32 202 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, 203 bool no_cck) 204 { 205 u32 tx_ant; 206 207 mvm->scan_last_antenna_idx = 208 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 209 mvm->scan_last_antenna_idx); 210 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 211 212 if (band == NL80211_BAND_2GHZ && !no_cck) 213 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 214 tx_ant); 215 else 216 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 217 } 218 219 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 220 struct ieee80211_vif *vif) 221 { 222 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 223 int *global_cnt = data; 224 225 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 226 mvmvif->phy_ctxt->id < NUM_PHY_CTX) 227 *global_cnt += 1; 228 } 229 230 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 231 { 232 return mvm->tcm.result.global_load; 233 } 234 235 static enum iwl_mvm_traffic_load 236 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band) 237 { 238 return mvm->tcm.result.band_load[band]; 239 } 240 241 static enum 242 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device, 243 enum iwl_mvm_traffic_load load, 244 bool low_latency) 245 { 246 int global_cnt = 0; 247 248 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 249 IEEE80211_IFACE_ITER_NORMAL, 250 iwl_mvm_scan_condition_iterator, 251 &global_cnt); 252 if (!global_cnt) 253 return IWL_SCAN_TYPE_UNASSOC; 254 255 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device && 256 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) 257 return IWL_SCAN_TYPE_FRAGMENTED; 258 259 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 260 return IWL_SCAN_TYPE_MILD; 261 262 return IWL_SCAN_TYPE_WILD; 263 } 264 265 static enum 266 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device) 267 { 268 enum iwl_mvm_traffic_load load; 269 bool low_latency; 270 271 load = iwl_mvm_get_traffic_load(mvm); 272 low_latency = iwl_mvm_low_latency(mvm); 273 274 return _iwl_mvm_get_scan_type(mvm, p2p_device, load, low_latency); 275 } 276 277 static enum 278 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm, 279 bool p2p_device, 280 enum nl80211_band band) 281 { 282 enum iwl_mvm_traffic_load load; 283 bool low_latency; 284 285 load = iwl_mvm_get_traffic_load_band(mvm, band); 286 low_latency = iwl_mvm_low_latency_band(mvm, band); 287 288 return _iwl_mvm_get_scan_type(mvm, p2p_device, load, low_latency); 289 } 290 291 static int 292 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm, 293 struct cfg80211_scan_request *req, 294 struct iwl_mvm_scan_params *params) 295 { 296 u32 duration = scan_timing[params->type].max_out_time; 297 298 if (!req->duration) 299 return 0; 300 301 if (iwl_mvm_is_cdb_supported(mvm)) { 302 u32 hb_time = scan_timing[params->hb_type].max_out_time; 303 304 duration = min_t(u32, duration, hb_time); 305 } 306 307 if (req->duration_mandatory && req->duration > duration) { 308 IWL_DEBUG_SCAN(mvm, 309 "Measurement scan - too long dwell %hu (max out time %u)\n", 310 req->duration, 311 duration); 312 return -EOPNOTSUPP; 313 } 314 315 return min_t(u32, (u32)req->duration, duration); 316 } 317 318 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 319 { 320 /* require rrm scan whenever the fw supports it */ 321 return fw_has_capa(&mvm->fw->ucode_capa, 322 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 323 } 324 325 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 326 { 327 int max_probe_len; 328 329 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 330 331 /* we create the 802.11 header and SSID element */ 332 max_probe_len -= 24 + 2; 333 334 /* DS parameter set element is added on 2.4GHZ band if required */ 335 if (iwl_mvm_rrm_scan_needed(mvm)) 336 max_probe_len -= 3; 337 338 return max_probe_len; 339 } 340 341 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 342 { 343 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 344 345 /* TODO: [BUG] This function should return the maximum allowed size of 346 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 347 * in the same command. So the correct implementation of this function 348 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 349 * command has only 512 bytes and it would leave us with about 240 350 * bytes for scan IEs, which is clearly not enough. So meanwhile 351 * we will report an incorrect value. This may result in a failure to 352 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 353 * functions with -ENOBUFS, if a large enough probe will be provided. 354 */ 355 return max_ie_len; 356 } 357 358 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 359 struct iwl_rx_cmd_buffer *rxb) 360 { 361 struct iwl_rx_packet *pkt = rxb_addr(rxb); 362 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 363 364 IWL_DEBUG_SCAN(mvm, 365 "Scan offload iteration complete: status=0x%x scanned channels=%d\n", 366 notif->status, notif->scanned_channels); 367 368 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 369 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 370 ieee80211_sched_scan_results(mvm->hw); 371 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 372 } 373 } 374 375 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 376 struct iwl_rx_cmd_buffer *rxb) 377 { 378 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 379 ieee80211_sched_scan_results(mvm->hw); 380 } 381 382 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 383 { 384 switch (status) { 385 case IWL_SCAN_EBS_SUCCESS: 386 return "successful"; 387 case IWL_SCAN_EBS_INACTIVE: 388 return "inactive"; 389 case IWL_SCAN_EBS_FAILED: 390 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 391 default: 392 return "failed"; 393 } 394 } 395 396 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 397 struct iwl_rx_cmd_buffer *rxb) 398 { 399 struct iwl_rx_packet *pkt = rxb_addr(rxb); 400 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 401 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 402 403 /* If this happens, the firmware has mistakenly sent an LMAC 404 * notification during UMAC scans -- warn and ignore it. 405 */ 406 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 407 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 408 return; 409 410 /* scan status must be locked for proper checking */ 411 lockdep_assert_held(&mvm->mutex); 412 413 /* We first check if we were stopping a scan, in which case we 414 * just clear the stopping flag. Then we check if it was a 415 * firmware initiated stop, in which case we need to inform 416 * mac80211. 417 * Note that we can have a stopping and a running scan 418 * simultaneously, but we can't have two different types of 419 * scans stopping or running at the same time (since LMAC 420 * doesn't support it). 421 */ 422 423 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 424 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 425 426 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 427 aborted ? "aborted" : "completed", 428 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 429 IWL_DEBUG_SCAN(mvm, 430 "Last line %d, Last iteration %d, Time after last iteration %d\n", 431 scan_notif->last_schedule_line, 432 scan_notif->last_schedule_iteration, 433 __le32_to_cpu(scan_notif->time_after_last_iter)); 434 435 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 436 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 437 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 438 aborted ? "aborted" : "completed", 439 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 440 441 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 442 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 443 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 444 445 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 446 aborted ? "aborted" : "completed", 447 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 448 IWL_DEBUG_SCAN(mvm, 449 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 450 scan_notif->last_schedule_line, 451 scan_notif->last_schedule_iteration, 452 __le32_to_cpu(scan_notif->time_after_last_iter)); 453 454 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 455 ieee80211_sched_scan_stopped(mvm->hw); 456 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 457 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 458 struct cfg80211_scan_info info = { 459 .aborted = aborted, 460 }; 461 462 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 463 aborted ? "aborted" : "completed", 464 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 465 466 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 467 ieee80211_scan_completed(mvm->hw, &info); 468 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 469 cancel_delayed_work(&mvm->scan_timeout_dwork); 470 iwl_mvm_resume_tcm(mvm); 471 } else { 472 IWL_ERR(mvm, 473 "got scan complete notification but no scan is running\n"); 474 } 475 476 mvm->last_ebs_successful = 477 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 478 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 479 } 480 481 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 482 { 483 int i; 484 485 for (i = 0; i < PROBE_OPTION_MAX; i++) { 486 if (!ssid_list[i].len) 487 break; 488 if (ssid_list[i].len == ssid_len && 489 !memcmp(ssid_list->ssid, ssid, ssid_len)) 490 return i; 491 } 492 return -1; 493 } 494 495 /* We insert the SSIDs in an inverted order, because the FW will 496 * invert it back. 497 */ 498 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 499 struct iwl_ssid_ie *ssids, 500 u32 *ssid_bitmap) 501 { 502 int i, j; 503 int index; 504 505 /* 506 * copy SSIDs from match list. 507 * iwl_config_sched_scan_profiles() uses the order of these ssids to 508 * config match list. 509 */ 510 for (i = 0, j = params->n_match_sets - 1; 511 j >= 0 && i < PROBE_OPTION_MAX; 512 i++, j--) { 513 /* skip empty SSID matchsets */ 514 if (!params->match_sets[j].ssid.ssid_len) 515 continue; 516 ssids[i].id = WLAN_EID_SSID; 517 ssids[i].len = params->match_sets[j].ssid.ssid_len; 518 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 519 ssids[i].len); 520 } 521 522 /* add SSIDs from scan SSID list */ 523 *ssid_bitmap = 0; 524 for (j = params->n_ssids - 1; 525 j >= 0 && i < PROBE_OPTION_MAX; 526 i++, j--) { 527 index = iwl_ssid_exist(params->ssids[j].ssid, 528 params->ssids[j].ssid_len, 529 ssids); 530 if (index < 0) { 531 ssids[i].id = WLAN_EID_SSID; 532 ssids[i].len = params->ssids[j].ssid_len; 533 memcpy(ssids[i].ssid, params->ssids[j].ssid, 534 ssids[i].len); 535 *ssid_bitmap |= BIT(i); 536 } else { 537 *ssid_bitmap |= BIT(index); 538 } 539 } 540 } 541 542 static int 543 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 544 struct cfg80211_sched_scan_request *req) 545 { 546 struct iwl_scan_offload_profile *profile; 547 struct iwl_scan_offload_profile_cfg *profile_cfg; 548 struct iwl_scan_offload_blacklist *blacklist; 549 struct iwl_host_cmd cmd = { 550 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 551 .len[1] = sizeof(*profile_cfg), 552 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 553 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 554 }; 555 int blacklist_len; 556 int i; 557 int ret; 558 559 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 560 return -EIO; 561 562 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 563 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 564 else 565 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 566 567 blacklist = kcalloc(blacklist_len, sizeof(*blacklist), GFP_KERNEL); 568 if (!blacklist) 569 return -ENOMEM; 570 571 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 572 if (!profile_cfg) { 573 ret = -ENOMEM; 574 goto free_blacklist; 575 } 576 577 cmd.data[0] = blacklist; 578 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 579 cmd.data[1] = profile_cfg; 580 581 /* No blacklist configuration */ 582 583 profile_cfg->num_profiles = req->n_match_sets; 584 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 585 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 586 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 587 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 588 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 589 590 for (i = 0; i < req->n_match_sets; i++) { 591 profile = &profile_cfg->profiles[i]; 592 profile->ssid_index = i; 593 /* Support any cipher and auth algorithm */ 594 profile->unicast_cipher = 0xff; 595 profile->auth_alg = 0xff; 596 profile->network_type = IWL_NETWORK_TYPE_ANY; 597 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 598 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 599 } 600 601 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 602 603 ret = iwl_mvm_send_cmd(mvm, &cmd); 604 kfree(profile_cfg); 605 free_blacklist: 606 kfree(blacklist); 607 608 return ret; 609 } 610 611 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 612 struct cfg80211_sched_scan_request *req) 613 { 614 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 615 IWL_DEBUG_SCAN(mvm, 616 "Sending scheduled scan with filtering, n_match_sets %d\n", 617 req->n_match_sets); 618 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 619 return false; 620 } 621 622 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 623 624 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 625 return true; 626 } 627 628 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 629 { 630 int ret; 631 struct iwl_host_cmd cmd = { 632 .id = SCAN_OFFLOAD_ABORT_CMD, 633 }; 634 u32 status = CAN_ABORT_STATUS; 635 636 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 637 if (ret) 638 return ret; 639 640 if (status != CAN_ABORT_STATUS) { 641 /* 642 * The scan abort will return 1 for success or 643 * 2 for "failure". A failure condition can be 644 * due to simply not being in an active scan which 645 * can occur if we send the scan abort before the 646 * microcode has notified us that a scan is completed. 647 */ 648 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 649 ret = -ENOENT; 650 } 651 652 return ret; 653 } 654 655 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 656 struct iwl_scan_req_tx_cmd *tx_cmd, 657 bool no_cck) 658 { 659 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 660 TX_CMD_FLG_BT_DIS); 661 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 662 NL80211_BAND_2GHZ, 663 no_cck); 664 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 665 666 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 667 TX_CMD_FLG_BT_DIS); 668 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 669 NL80211_BAND_5GHZ, 670 no_cck); 671 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 672 } 673 674 static void 675 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 676 struct ieee80211_channel **channels, 677 int n_channels, u32 ssid_bitmap, 678 struct iwl_scan_req_lmac *cmd) 679 { 680 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 681 int i; 682 683 for (i = 0; i < n_channels; i++) { 684 channel_cfg[i].channel_num = 685 cpu_to_le16(channels[i]->hw_value); 686 channel_cfg[i].iter_count = cpu_to_le16(1); 687 channel_cfg[i].iter_interval = 0; 688 channel_cfg[i].flags = 689 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 690 ssid_bitmap); 691 } 692 } 693 694 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 695 size_t len, u8 *const pos) 696 { 697 static const u8 before_ds_params[] = { 698 WLAN_EID_SSID, 699 WLAN_EID_SUPP_RATES, 700 WLAN_EID_REQUEST, 701 WLAN_EID_EXT_SUPP_RATES, 702 }; 703 size_t offs; 704 u8 *newpos = pos; 705 706 if (!iwl_mvm_rrm_scan_needed(mvm)) { 707 memcpy(newpos, ies, len); 708 return newpos + len; 709 } 710 711 offs = ieee80211_ie_split(ies, len, 712 before_ds_params, 713 ARRAY_SIZE(before_ds_params), 714 0); 715 716 memcpy(newpos, ies, offs); 717 newpos += offs; 718 719 /* Add a placeholder for DS Parameter Set element */ 720 *newpos++ = WLAN_EID_DS_PARAMS; 721 *newpos++ = 1; 722 *newpos++ = 0; 723 724 memcpy(newpos, ies + offs, len - offs); 725 newpos += len - offs; 726 727 return newpos; 728 } 729 730 #define WFA_TPC_IE_LEN 9 731 732 static void iwl_mvm_add_tpc_report_ie(u8 *pos) 733 { 734 pos[0] = WLAN_EID_VENDOR_SPECIFIC; 735 pos[1] = WFA_TPC_IE_LEN - 2; 736 pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff; 737 pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff; 738 pos[4] = WLAN_OUI_MICROSOFT & 0xff; 739 pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC; 740 pos[6] = 0; 741 /* pos[7] - tx power will be inserted by the FW */ 742 pos[7] = 0; 743 pos[8] = 0; 744 } 745 746 static void 747 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 748 struct ieee80211_scan_ies *ies, 749 struct iwl_mvm_scan_params *params) 750 { 751 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 752 u8 *pos, *newpos; 753 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 754 params->mac_addr : NULL; 755 756 /* 757 * Unfortunately, right now the offload scan doesn't support randomising 758 * within the firmware, so until the firmware API is ready we implement 759 * it in the driver. This means that the scan iterations won't really be 760 * random, only when it's restarted, but at least that helps a bit. 761 */ 762 if (mac_addr) 763 get_random_mask_addr(frame->sa, mac_addr, 764 params->mac_addr_mask); 765 else 766 memcpy(frame->sa, vif->addr, ETH_ALEN); 767 768 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 769 eth_broadcast_addr(frame->da); 770 eth_broadcast_addr(frame->bssid); 771 frame->seq_ctrl = 0; 772 773 pos = frame->u.probe_req.variable; 774 *pos++ = WLAN_EID_SSID; 775 *pos++ = 0; 776 777 params->preq.mac_header.offset = 0; 778 params->preq.mac_header.len = cpu_to_le16(24 + 2); 779 780 /* Insert ds parameter set element on 2.4 GHz band */ 781 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 782 ies->ies[NL80211_BAND_2GHZ], 783 ies->len[NL80211_BAND_2GHZ], 784 pos); 785 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 786 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 787 pos = newpos; 788 789 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 790 ies->len[NL80211_BAND_5GHZ]); 791 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 792 params->preq.band_data[1].len = 793 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 794 pos += ies->len[NL80211_BAND_5GHZ]; 795 796 memcpy(pos, ies->common_ies, ies->common_ie_len); 797 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 798 799 if (iwl_mvm_rrm_scan_needed(mvm) && 800 !fw_has_capa(&mvm->fw->ucode_capa, 801 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) { 802 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len); 803 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len + 804 WFA_TPC_IE_LEN); 805 } else { 806 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 807 } 808 } 809 810 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 811 struct iwl_scan_req_lmac *cmd, 812 struct iwl_mvm_scan_params *params) 813 { 814 cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE; 815 cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE; 816 cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 817 cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED; 818 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 819 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 820 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 821 } 822 823 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 824 struct ieee80211_scan_ies *ies, 825 int n_channels) 826 { 827 return ((n_ssids <= PROBE_OPTION_MAX) && 828 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 829 (ies->common_ie_len + 830 ies->len[NL80211_BAND_2GHZ] + 831 ies->len[NL80211_BAND_5GHZ] <= 832 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 833 } 834 835 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 836 struct ieee80211_vif *vif) 837 { 838 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 839 840 /* We can only use EBS if: 841 * 1. the feature is supported; 842 * 2. the last EBS was successful; 843 * 3. if only single scan, the single scan EBS API is supported; 844 * 4. it's not a p2p find operation. 845 */ 846 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 847 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS && 848 vif->type != NL80211_IFTYPE_P2P_DEVICE); 849 } 850 851 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 852 { 853 return params->n_scan_plans == 1 && 854 params->scan_plans[0].iterations == 1; 855 } 856 857 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 858 struct iwl_mvm_scan_params *params, 859 struct ieee80211_vif *vif) 860 { 861 int flags = 0; 862 863 if (params->n_ssids == 0) 864 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 865 866 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 867 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 868 869 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 870 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 871 872 if (iwl_mvm_rrm_scan_needed(mvm) && 873 fw_has_capa(&mvm->fw->ucode_capa, 874 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 875 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 876 877 if (params->pass_all) 878 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 879 else 880 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 881 882 #ifdef CONFIG_IWLWIFI_DEBUGFS 883 if (mvm->scan_iter_notif_enabled) 884 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 885 #endif 886 887 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 888 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 889 890 if (iwl_mvm_is_regular_scan(params) && 891 vif->type != NL80211_IFTYPE_P2P_DEVICE && 892 params->type != IWL_SCAN_TYPE_FRAGMENTED) 893 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 894 895 return flags; 896 } 897 898 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 899 struct iwl_mvm_scan_params *params) 900 { 901 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 902 struct iwl_scan_probe_req *preq = 903 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 904 mvm->fw->ucode_capa.n_scan_channels); 905 u32 ssid_bitmap = 0; 906 int i; 907 908 lockdep_assert_held(&mvm->mutex); 909 910 memset(cmd, 0, ksize(cmd)); 911 912 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 913 return -EINVAL; 914 915 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 916 917 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 918 cmd->iter_num = cpu_to_le32(1); 919 cmd->n_channels = (u8)params->n_channels; 920 921 cmd->delay = cpu_to_le32(params->delay); 922 923 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 924 vif)); 925 926 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 927 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 928 MAC_FILTER_IN_BEACON); 929 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 930 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 931 932 /* this API uses bits 1-20 instead of 0-19 */ 933 ssid_bitmap <<= 1; 934 935 for (i = 0; i < params->n_scan_plans; i++) { 936 struct cfg80211_sched_scan_plan *scan_plan = 937 ¶ms->scan_plans[i]; 938 939 cmd->schedule[i].delay = 940 cpu_to_le16(scan_plan->interval); 941 cmd->schedule[i].iterations = scan_plan->iterations; 942 cmd->schedule[i].full_scan_mul = 1; 943 } 944 945 /* 946 * If the number of iterations of the last scan plan is set to 947 * zero, it should run infinitely. However, this is not always the case. 948 * For example, when regular scan is requested the driver sets one scan 949 * plan with one iteration. 950 */ 951 if (!cmd->schedule[i - 1].iterations) 952 cmd->schedule[i - 1].iterations = 0xff; 953 954 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 955 cmd->channel_opt[0].flags = 956 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 957 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 958 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 959 cmd->channel_opt[0].non_ebs_ratio = 960 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 961 cmd->channel_opt[1].flags = 962 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 963 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 964 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 965 cmd->channel_opt[1].non_ebs_ratio = 966 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 967 } 968 969 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 970 params->n_channels, ssid_bitmap, cmd); 971 972 *preq = params->preq; 973 974 return 0; 975 } 976 977 static int rate_to_scan_rate_flag(unsigned int rate) 978 { 979 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 980 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 981 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 982 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 983 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 984 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 985 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 986 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 987 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 988 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 989 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 990 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 991 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 992 }; 993 994 return rate_to_scan_rate[rate]; 995 } 996 997 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 998 { 999 struct ieee80211_supported_band *band; 1000 unsigned int rates = 0; 1001 int i; 1002 1003 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1004 for (i = 0; i < band->n_bitrates; i++) 1005 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 1006 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1007 for (i = 0; i < band->n_bitrates; i++) 1008 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 1009 1010 /* Set both basic rates and supported rates */ 1011 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 1012 1013 return cpu_to_le32(rates); 1014 } 1015 1016 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm, 1017 struct iwl_scan_dwell *dwell) 1018 { 1019 dwell->active = IWL_SCAN_DWELL_ACTIVE; 1020 dwell->passive = IWL_SCAN_DWELL_PASSIVE; 1021 dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED; 1022 dwell->extended = IWL_SCAN_DWELL_EXTENDED; 1023 } 1024 1025 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels) 1026 { 1027 struct ieee80211_supported_band *band; 1028 int i, j = 0; 1029 1030 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1031 for (i = 0; i < band->n_channels; i++, j++) 1032 channels[j] = band->channels[i].hw_value; 1033 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1034 for (i = 0; i < band->n_channels; i++, j++) 1035 channels[j] = band->channels[i].hw_value; 1036 } 1037 1038 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config, 1039 u32 flags, u8 channel_flags) 1040 { 1041 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1042 struct iwl_scan_config_v1 *cfg = config; 1043 1044 cfg->flags = cpu_to_le32(flags); 1045 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1046 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1047 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1048 cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time); 1049 cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 1050 1051 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1052 1053 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1054 1055 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1056 cfg->channel_flags = channel_flags; 1057 1058 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1059 } 1060 1061 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config, 1062 u32 flags, u8 channel_flags) 1063 { 1064 struct iwl_scan_config *cfg = config; 1065 1066 cfg->flags = cpu_to_le32(flags); 1067 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1068 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1069 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1070 1071 if (iwl_mvm_is_cdb_supported(mvm)) { 1072 enum iwl_mvm_scan_type lb_type, hb_type; 1073 1074 lb_type = iwl_mvm_get_scan_type_band(mvm, false, 1075 NL80211_BAND_2GHZ); 1076 hb_type = iwl_mvm_get_scan_type_band(mvm, false, 1077 NL80211_BAND_5GHZ); 1078 1079 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = 1080 cpu_to_le32(scan_timing[lb_type].max_out_time); 1081 cfg->suspend_time[SCAN_LB_LMAC_IDX] = 1082 cpu_to_le32(scan_timing[lb_type].suspend_time); 1083 1084 cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] = 1085 cpu_to_le32(scan_timing[hb_type].max_out_time); 1086 cfg->suspend_time[SCAN_HB_LMAC_IDX] = 1087 cpu_to_le32(scan_timing[hb_type].suspend_time); 1088 } else { 1089 enum iwl_mvm_scan_type type = 1090 iwl_mvm_get_scan_type(mvm, false); 1091 1092 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = 1093 cpu_to_le32(scan_timing[type].max_out_time); 1094 cfg->suspend_time[SCAN_LB_LMAC_IDX] = 1095 cpu_to_le32(scan_timing[type].suspend_time); 1096 } 1097 1098 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1099 1100 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1101 1102 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1103 cfg->channel_flags = channel_flags; 1104 1105 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1106 } 1107 1108 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 1109 { 1110 void *cfg; 1111 int ret, cmd_size; 1112 struct iwl_host_cmd cmd = { 1113 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 1114 }; 1115 enum iwl_mvm_scan_type type; 1116 enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET; 1117 int num_channels = 1118 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 1119 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 1120 u32 flags; 1121 u8 channel_flags; 1122 1123 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 1124 return -ENOBUFS; 1125 1126 if (iwl_mvm_is_cdb_supported(mvm)) { 1127 type = iwl_mvm_get_scan_type_band(mvm, false, 1128 NL80211_BAND_2GHZ); 1129 hb_type = iwl_mvm_get_scan_type_band(mvm, false, 1130 NL80211_BAND_5GHZ); 1131 if (type == mvm->scan_type && hb_type == mvm->hb_scan_type) 1132 return 0; 1133 } else { 1134 type = iwl_mvm_get_scan_type(mvm, false); 1135 if (type == mvm->scan_type) 1136 return 0; 1137 } 1138 1139 if (iwl_mvm_cdb_scan_api(mvm)) 1140 cmd_size = sizeof(struct iwl_scan_config); 1141 else 1142 cmd_size = sizeof(struct iwl_scan_config_v1); 1143 cmd_size += mvm->fw->ucode_capa.n_scan_channels; 1144 1145 cfg = kzalloc(cmd_size, GFP_KERNEL); 1146 if (!cfg) 1147 return -ENOMEM; 1148 1149 flags = SCAN_CONFIG_FLAG_ACTIVATE | 1150 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 1151 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 1152 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 1153 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 1154 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 1155 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 1156 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 1157 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS | 1158 SCAN_CONFIG_N_CHANNELS(num_channels) | 1159 (type == IWL_SCAN_TYPE_FRAGMENTED ? 1160 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 1161 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 1162 1163 channel_flags = IWL_CHANNEL_FLAG_EBS | 1164 IWL_CHANNEL_FLAG_ACCURATE_EBS | 1165 IWL_CHANNEL_FLAG_EBS_ADD | 1166 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 1167 1168 /* 1169 * Check for fragmented scan on LMAC2 - high band. 1170 * LMAC1 - low band is checked above. 1171 */ 1172 if (iwl_mvm_cdb_scan_api(mvm)) { 1173 if (iwl_mvm_is_cdb_supported(mvm)) 1174 flags |= (hb_type == IWL_SCAN_TYPE_FRAGMENTED) ? 1175 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED : 1176 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED; 1177 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags); 1178 } else { 1179 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags); 1180 } 1181 1182 cmd.data[0] = cfg; 1183 cmd.len[0] = cmd_size; 1184 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1185 1186 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1187 1188 ret = iwl_mvm_send_cmd(mvm, &cmd); 1189 if (!ret) { 1190 mvm->scan_type = type; 1191 mvm->hb_scan_type = hb_type; 1192 } 1193 1194 kfree(cfg); 1195 return ret; 1196 } 1197 1198 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1199 { 1200 int i; 1201 1202 for (i = 0; i < mvm->max_scans; i++) 1203 if (mvm->scan_uid_status[i] == status) 1204 return i; 1205 1206 return -ENOENT; 1207 } 1208 1209 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1210 struct iwl_scan_req_umac *cmd, 1211 struct iwl_mvm_scan_params *params) 1212 { 1213 struct iwl_mvm_scan_timing_params *timing, *hb_timing; 1214 u8 active_dwell, passive_dwell; 1215 1216 timing = &scan_timing[params->type]; 1217 active_dwell = params->measurement_dwell ? 1218 params->measurement_dwell : IWL_SCAN_DWELL_ACTIVE; 1219 passive_dwell = params->measurement_dwell ? 1220 params->measurement_dwell : IWL_SCAN_DWELL_PASSIVE; 1221 1222 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1223 cmd->v7.adwell_default_n_aps_social = 1224 IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL; 1225 cmd->v7.adwell_default_n_aps = 1226 IWL_SCAN_ADWELL_DEFAULT_N_APS; 1227 1228 /* if custom max budget was configured with debugfs */ 1229 if (IWL_MVM_ADWELL_MAX_BUDGET) 1230 cmd->v7.adwell_max_budget = 1231 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET); 1232 else if (params->ssids && params->ssids[0].ssid_len) 1233 cmd->v7.adwell_max_budget = 1234 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN); 1235 else 1236 cmd->v7.adwell_max_budget = 1237 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN); 1238 1239 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1240 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] = 1241 cpu_to_le32(timing->max_out_time); 1242 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] = 1243 cpu_to_le32(timing->suspend_time); 1244 1245 if (iwl_mvm_is_cdb_supported(mvm)) { 1246 hb_timing = &scan_timing[params->hb_type]; 1247 1248 cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] = 1249 cpu_to_le32(hb_timing->max_out_time); 1250 cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] = 1251 cpu_to_le32(hb_timing->suspend_time); 1252 } 1253 1254 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1255 cmd->v7.active_dwell = active_dwell; 1256 cmd->v7.passive_dwell = passive_dwell; 1257 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1258 } else { 1259 cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell; 1260 cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell; 1261 if (iwl_mvm_is_cdb_supported(mvm)) { 1262 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] = 1263 active_dwell; 1264 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] = 1265 passive_dwell; 1266 } 1267 } 1268 } else { 1269 cmd->v1.extended_dwell = params->measurement_dwell ? 1270 params->measurement_dwell : IWL_SCAN_DWELL_EXTENDED; 1271 cmd->v1.active_dwell = active_dwell; 1272 cmd->v1.passive_dwell = passive_dwell; 1273 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1274 1275 if (iwl_mvm_is_cdb_supported(mvm)) { 1276 hb_timing = &scan_timing[params->hb_type]; 1277 1278 cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] = 1279 cpu_to_le32(hb_timing->max_out_time); 1280 cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] = 1281 cpu_to_le32(hb_timing->suspend_time); 1282 } 1283 1284 if (iwl_mvm_cdb_scan_api(mvm)) { 1285 cmd->v6.scan_priority = 1286 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1287 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] = 1288 cpu_to_le32(timing->max_out_time); 1289 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] = 1290 cpu_to_le32(timing->suspend_time); 1291 } else { 1292 cmd->v1.scan_priority = 1293 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1294 cmd->v1.max_out_time = 1295 cpu_to_le32(timing->max_out_time); 1296 cmd->v1.suspend_time = 1297 cpu_to_le32(timing->suspend_time); 1298 } 1299 } 1300 1301 if (iwl_mvm_is_regular_scan(params)) 1302 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1303 else 1304 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2); 1305 } 1306 1307 static void 1308 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1309 struct ieee80211_channel **channels, 1310 int n_channels, u32 ssid_bitmap, 1311 struct iwl_scan_channel_cfg_umac *channel_cfg) 1312 { 1313 int i; 1314 1315 for (i = 0; i < n_channels; i++) { 1316 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1317 channel_cfg[i].channel_num = channels[i]->hw_value; 1318 channel_cfg[i].iter_count = 1; 1319 channel_cfg[i].iter_interval = 0; 1320 } 1321 } 1322 1323 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1324 struct iwl_mvm_scan_params *params, 1325 struct ieee80211_vif *vif) 1326 { 1327 u16 flags = 0; 1328 1329 if (params->n_ssids == 0) 1330 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1331 1332 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1333 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1334 1335 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 1336 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1337 1338 if (iwl_mvm_is_cdb_supported(mvm) && 1339 params->hb_type == IWL_SCAN_TYPE_FRAGMENTED) 1340 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED; 1341 1342 if (iwl_mvm_rrm_scan_needed(mvm) && 1343 fw_has_capa(&mvm->fw->ucode_capa, 1344 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 1345 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1346 1347 if (params->pass_all) 1348 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1349 else 1350 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1351 1352 if (!iwl_mvm_is_regular_scan(params)) 1353 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1354 1355 if (params->measurement_dwell) 1356 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1357 1358 #ifdef CONFIG_IWLWIFI_DEBUGFS 1359 if (mvm->scan_iter_notif_enabled) 1360 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1361 #endif 1362 1363 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1364 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1365 1366 if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE && 1367 vif->type != NL80211_IFTYPE_P2P_DEVICE) 1368 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL; 1369 1370 /* 1371 * Extended dwell is relevant only for low band to start with, as it is 1372 * being used for social channles only (1, 6, 11), so we can check 1373 * only scan type on low band also for CDB. 1374 */ 1375 if (iwl_mvm_is_regular_scan(params) && 1376 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1377 params->type != IWL_SCAN_TYPE_FRAGMENTED && 1378 !iwl_mvm_is_adaptive_dwell_supported(mvm) && 1379 !iwl_mvm_is_oce_supported(mvm)) 1380 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1381 1382 if (iwl_mvm_is_oce_supported(mvm)) { 1383 if ((params->flags & 1384 NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE)) 1385 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE; 1386 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and 1387 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares 1388 * the same bit, we need to make sure that we use this bit here 1389 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be 1390 * used. */ 1391 if ((params->flags & 1392 NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) && 1393 !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm))) 1394 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP; 1395 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)) 1396 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME; 1397 } 1398 1399 return flags; 1400 } 1401 1402 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1403 struct iwl_mvm_scan_params *params, 1404 int type) 1405 { 1406 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1407 struct iwl_scan_umac_chan_param *chan_param; 1408 void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm); 1409 struct iwl_scan_req_umac_tail *sec_part = cmd_data + 1410 sizeof(struct iwl_scan_channel_cfg_umac) * 1411 mvm->fw->ucode_capa.n_scan_channels; 1412 int uid, i; 1413 u32 ssid_bitmap = 0; 1414 u8 channel_flags = 0; 1415 u16 gen_flags; 1416 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); 1417 1418 chan_param = iwl_mvm_get_scan_req_umac_channel(mvm); 1419 1420 lockdep_assert_held(&mvm->mutex); 1421 1422 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1423 return -EINVAL; 1424 1425 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1426 if (uid < 0) 1427 return uid; 1428 1429 memset(cmd, 0, ksize(cmd)); 1430 1431 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1432 1433 mvm->scan_uid_status[uid] = type; 1434 1435 cmd->uid = cpu_to_le32(uid); 1436 gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif); 1437 cmd->general_flags = cpu_to_le16(gen_flags); 1438 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1439 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED) 1440 cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] = 1441 IWL_SCAN_NUM_OF_FRAGS; 1442 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED) 1443 cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] = 1444 IWL_SCAN_NUM_OF_FRAGS; 1445 } 1446 1447 cmd->scan_start_mac_id = scan_vif->id; 1448 1449 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1450 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1451 1452 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1453 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1454 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1455 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1456 1457 chan_param->flags = channel_flags; 1458 chan_param->count = params->n_channels; 1459 1460 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1461 1462 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1463 params->n_channels, ssid_bitmap, 1464 cmd_data); 1465 1466 for (i = 0; i < params->n_scan_plans; i++) { 1467 struct cfg80211_sched_scan_plan *scan_plan = 1468 ¶ms->scan_plans[i]; 1469 1470 sec_part->schedule[i].iter_count = scan_plan->iterations; 1471 sec_part->schedule[i].interval = 1472 cpu_to_le16(scan_plan->interval); 1473 } 1474 1475 /* 1476 * If the number of iterations of the last scan plan is set to 1477 * zero, it should run infinitely. However, this is not always the case. 1478 * For example, when regular scan is requested the driver sets one scan 1479 * plan with one iteration. 1480 */ 1481 if (!sec_part->schedule[i - 1].iter_count) 1482 sec_part->schedule[i - 1].iter_count = 0xff; 1483 1484 sec_part->delay = cpu_to_le16(params->delay); 1485 sec_part->preq = params->preq; 1486 1487 return 0; 1488 } 1489 1490 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1491 { 1492 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1493 } 1494 1495 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1496 { 1497 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa, 1498 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG); 1499 1500 /* This looks a bit arbitrary, but the idea is that if we run 1501 * out of possible simultaneous scans and the userspace is 1502 * trying to run a scan type that is already running, we 1503 * return -EBUSY. But if the userspace wants to start a 1504 * different type of scan, we stop the opposite type to make 1505 * space for the new request. The reason is backwards 1506 * compatibility with old wpa_supplicant that wouldn't stop a 1507 * scheduled scan before starting a normal scan. 1508 */ 1509 1510 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1511 return 0; 1512 1513 /* Use a switch, even though this is a bitmask, so that more 1514 * than one bits set will fall in default and we will warn. 1515 */ 1516 switch (type) { 1517 case IWL_MVM_SCAN_REGULAR: 1518 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1519 return -EBUSY; 1520 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1521 case IWL_MVM_SCAN_SCHED: 1522 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1523 return -EBUSY; 1524 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1525 case IWL_MVM_SCAN_NETDETECT: 1526 /* For non-unified images, there's no need to stop 1527 * anything for net-detect since the firmware is 1528 * restarted anyway. This way, any sched scans that 1529 * were running will be restarted when we resume. 1530 */ 1531 if (!unified_image) 1532 return 0; 1533 1534 /* If this is a unified image and we ran out of scans, 1535 * we need to stop something. Prefer stopping regular 1536 * scans, because the results are useless at this 1537 * point, and we should be able to keep running 1538 * another scheduled scan while suspended. 1539 */ 1540 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1541 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, 1542 true); 1543 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1544 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, 1545 true); 1546 1547 /* fall through, something is wrong if no scan was 1548 * running but we ran out of scans. 1549 */ 1550 default: 1551 WARN_ON(1); 1552 break; 1553 } 1554 1555 return -EIO; 1556 } 1557 1558 #define SCAN_TIMEOUT 20000 1559 1560 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1561 { 1562 struct delayed_work *delayed_work = to_delayed_work(work); 1563 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1564 scan_timeout_dwork); 1565 1566 IWL_ERR(mvm, "regular scan timed out\n"); 1567 1568 iwl_force_nmi(mvm->trans); 1569 } 1570 1571 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm, 1572 struct iwl_mvm_scan_params *params, 1573 bool p2p) 1574 { 1575 if (iwl_mvm_is_cdb_supported(mvm)) { 1576 params->type = 1577 iwl_mvm_get_scan_type_band(mvm, p2p, 1578 NL80211_BAND_2GHZ); 1579 params->hb_type = 1580 iwl_mvm_get_scan_type_band(mvm, p2p, 1581 NL80211_BAND_5GHZ); 1582 } else { 1583 params->type = iwl_mvm_get_scan_type(mvm, p2p); 1584 } 1585 } 1586 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1587 struct cfg80211_scan_request *req, 1588 struct ieee80211_scan_ies *ies) 1589 { 1590 struct iwl_host_cmd hcmd = { 1591 .len = { iwl_mvm_scan_size(mvm), }, 1592 .data = { mvm->scan_cmd, }, 1593 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1594 }; 1595 struct iwl_mvm_scan_params params = {}; 1596 int ret; 1597 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1598 1599 lockdep_assert_held(&mvm->mutex); 1600 1601 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1602 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1603 return -EBUSY; 1604 } 1605 1606 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1607 if (ret) 1608 return ret; 1609 1610 /* we should have failed registration if scan_cmd was NULL */ 1611 if (WARN_ON(!mvm->scan_cmd)) 1612 return -ENOMEM; 1613 1614 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1615 return -ENOBUFS; 1616 1617 params.n_ssids = req->n_ssids; 1618 params.flags = req->flags; 1619 params.n_channels = req->n_channels; 1620 params.delay = 0; 1621 params.ssids = req->ssids; 1622 params.channels = req->channels; 1623 params.mac_addr = req->mac_addr; 1624 params.mac_addr_mask = req->mac_addr_mask; 1625 params.no_cck = req->no_cck; 1626 params.pass_all = true; 1627 params.n_match_sets = 0; 1628 params.match_sets = NULL; 1629 1630 params.scan_plans = &scan_plan; 1631 params.n_scan_plans = 1; 1632 1633 iwl_mvm_fill_scan_type(mvm, ¶ms, 1634 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1635 1636 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms); 1637 if (ret < 0) 1638 return ret; 1639 1640 params.measurement_dwell = ret; 1641 1642 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1643 1644 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1645 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1646 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1647 IWL_MVM_SCAN_REGULAR); 1648 } else { 1649 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1650 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1651 } 1652 1653 if (ret) 1654 return ret; 1655 1656 iwl_mvm_pause_tcm(mvm, false); 1657 1658 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1659 if (ret) { 1660 /* If the scan failed, it usually means that the FW was unable 1661 * to allocate the time events. Warn on it, but maybe we 1662 * should try to send the command again with different params. 1663 */ 1664 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1665 iwl_mvm_resume_tcm(mvm); 1666 return ret; 1667 } 1668 1669 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1670 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1671 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); 1672 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1673 1674 schedule_delayed_work(&mvm->scan_timeout_dwork, 1675 msecs_to_jiffies(SCAN_TIMEOUT)); 1676 1677 return 0; 1678 } 1679 1680 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1681 struct ieee80211_vif *vif, 1682 struct cfg80211_sched_scan_request *req, 1683 struct ieee80211_scan_ies *ies, 1684 int type) 1685 { 1686 struct iwl_host_cmd hcmd = { 1687 .len = { iwl_mvm_scan_size(mvm), }, 1688 .data = { mvm->scan_cmd, }, 1689 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1690 }; 1691 struct iwl_mvm_scan_params params = {}; 1692 int ret; 1693 1694 lockdep_assert_held(&mvm->mutex); 1695 1696 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1697 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1698 return -EBUSY; 1699 } 1700 1701 ret = iwl_mvm_check_running_scans(mvm, type); 1702 if (ret) 1703 return ret; 1704 1705 /* we should have failed registration if scan_cmd was NULL */ 1706 if (WARN_ON(!mvm->scan_cmd)) 1707 return -ENOMEM; 1708 1709 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1710 return -ENOBUFS; 1711 1712 params.n_ssids = req->n_ssids; 1713 params.flags = req->flags; 1714 params.n_channels = req->n_channels; 1715 params.ssids = req->ssids; 1716 params.channels = req->channels; 1717 params.mac_addr = req->mac_addr; 1718 params.mac_addr_mask = req->mac_addr_mask; 1719 params.no_cck = false; 1720 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1721 params.n_match_sets = req->n_match_sets; 1722 params.match_sets = req->match_sets; 1723 if (!req->n_scan_plans) 1724 return -EINVAL; 1725 1726 params.n_scan_plans = req->n_scan_plans; 1727 params.scan_plans = req->scan_plans; 1728 1729 iwl_mvm_fill_scan_type(mvm, ¶ms, 1730 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1731 1732 /* In theory, LMAC scans can handle a 32-bit delay, but since 1733 * waiting for over 18 hours to start the scan is a bit silly 1734 * and to keep it aligned with UMAC scans (which only support 1735 * 16-bit delays), trim it down to 16-bits. 1736 */ 1737 if (req->delay > U16_MAX) { 1738 IWL_DEBUG_SCAN(mvm, 1739 "delay value is > 16-bits, set to max possible\n"); 1740 params.delay = U16_MAX; 1741 } else { 1742 params.delay = req->delay; 1743 } 1744 1745 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1746 if (ret) 1747 return ret; 1748 1749 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1750 1751 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1752 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1753 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1754 } else { 1755 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1756 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1757 } 1758 1759 if (ret) 1760 return ret; 1761 1762 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1763 if (!ret) { 1764 IWL_DEBUG_SCAN(mvm, 1765 "Sched scan request was sent successfully\n"); 1766 mvm->scan_status |= type; 1767 } else { 1768 /* If the scan failed, it usually means that the FW was unable 1769 * to allocate the time events. Warn on it, but maybe we 1770 * should try to send the command again with different params. 1771 */ 1772 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1773 } 1774 1775 return ret; 1776 } 1777 1778 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1779 struct iwl_rx_cmd_buffer *rxb) 1780 { 1781 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1782 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1783 u32 uid = __le32_to_cpu(notif->uid); 1784 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1785 1786 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1787 return; 1788 1789 /* if the scan is already stopping, we don't need to notify mac80211 */ 1790 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1791 struct cfg80211_scan_info info = { 1792 .aborted = aborted, 1793 .scan_start_tsf = mvm->scan_start, 1794 }; 1795 1796 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); 1797 ieee80211_scan_completed(mvm->hw, &info); 1798 mvm->scan_vif = NULL; 1799 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1800 cancel_delayed_work(&mvm->scan_timeout_dwork); 1801 iwl_mvm_resume_tcm(mvm); 1802 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1803 ieee80211_sched_scan_stopped(mvm->hw); 1804 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1805 } 1806 1807 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1808 IWL_DEBUG_SCAN(mvm, 1809 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1810 uid, mvm->scan_uid_status[uid], 1811 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1812 "completed" : "aborted", 1813 iwl_mvm_ebs_status_str(notif->ebs_status)); 1814 IWL_DEBUG_SCAN(mvm, 1815 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1816 notif->last_schedule, notif->last_iter, 1817 __le32_to_cpu(notif->time_from_last_iter)); 1818 1819 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1820 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1821 mvm->last_ebs_successful = false; 1822 1823 mvm->scan_uid_status[uid] = 0; 1824 } 1825 1826 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1827 struct iwl_rx_cmd_buffer *rxb) 1828 { 1829 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1830 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1831 1832 mvm->scan_start = le64_to_cpu(notif->start_tsf); 1833 1834 IWL_DEBUG_SCAN(mvm, 1835 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n", 1836 notif->status, notif->scanned_channels); 1837 1838 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1839 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1840 ieee80211_sched_scan_results(mvm->hw); 1841 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1842 } 1843 1844 IWL_DEBUG_SCAN(mvm, 1845 "UMAC Scan iteration complete: scan started at %llu (TSF)\n", 1846 mvm->scan_start); 1847 } 1848 1849 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1850 { 1851 struct iwl_umac_scan_abort cmd = {}; 1852 int uid, ret; 1853 1854 lockdep_assert_held(&mvm->mutex); 1855 1856 /* We should always get a valid index here, because we already 1857 * checked that this type of scan was running in the generic 1858 * code. 1859 */ 1860 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1861 if (WARN_ON_ONCE(uid < 0)) 1862 return uid; 1863 1864 cmd.uid = cpu_to_le32(uid); 1865 1866 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1867 1868 ret = iwl_mvm_send_cmd_pdu(mvm, 1869 iwl_cmd_id(SCAN_ABORT_UMAC, 1870 IWL_ALWAYS_LONG_GROUP, 0), 1871 0, sizeof(cmd), &cmd); 1872 if (!ret) 1873 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1874 1875 return ret; 1876 } 1877 1878 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1879 { 1880 struct iwl_notification_wait wait_scan_done; 1881 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1882 SCAN_OFFLOAD_COMPLETE, }; 1883 int ret; 1884 1885 lockdep_assert_held(&mvm->mutex); 1886 1887 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1888 scan_done_notif, 1889 ARRAY_SIZE(scan_done_notif), 1890 NULL, NULL); 1891 1892 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1893 1894 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1895 ret = iwl_mvm_umac_scan_abort(mvm, type); 1896 else 1897 ret = iwl_mvm_lmac_scan_abort(mvm); 1898 1899 if (ret) { 1900 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1901 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1902 return ret; 1903 } 1904 1905 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1906 1907 return ret; 1908 } 1909 1910 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1911 { 1912 int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1; 1913 1914 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 1915 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8; 1916 else if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 1917 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7; 1918 else if (iwl_mvm_cdb_scan_api(mvm)) 1919 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6; 1920 1921 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1922 return base_size + 1923 sizeof(struct iwl_scan_channel_cfg_umac) * 1924 mvm->fw->ucode_capa.n_scan_channels + 1925 sizeof(struct iwl_scan_req_umac_tail); 1926 1927 return sizeof(struct iwl_scan_req_lmac) + 1928 sizeof(struct iwl_scan_channel_cfg_lmac) * 1929 mvm->fw->ucode_capa.n_scan_channels + 1930 sizeof(struct iwl_scan_probe_req); 1931 } 1932 1933 /* 1934 * This function is used in nic restart flow, to inform mac80211 about scans 1935 * that was aborted by restart flow or by an assert. 1936 */ 1937 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1938 { 1939 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1940 int uid, i; 1941 1942 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1943 if (uid >= 0) { 1944 struct cfg80211_scan_info info = { 1945 .aborted = true, 1946 }; 1947 1948 ieee80211_scan_completed(mvm->hw, &info); 1949 mvm->scan_uid_status[uid] = 0; 1950 } 1951 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1952 if (uid >= 0 && !mvm->fw_restart) { 1953 ieee80211_sched_scan_stopped(mvm->hw); 1954 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1955 mvm->scan_uid_status[uid] = 0; 1956 } 1957 1958 /* We shouldn't have any UIDs still set. Loop over all the 1959 * UIDs to make sure there's nothing left there and warn if 1960 * any is found. 1961 */ 1962 for (i = 0; i < mvm->max_scans; i++) { 1963 if (WARN_ONCE(mvm->scan_uid_status[i], 1964 "UMAC scan UID %d status was not cleaned\n", 1965 i)) 1966 mvm->scan_uid_status[i] = 0; 1967 } 1968 } else { 1969 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 1970 struct cfg80211_scan_info info = { 1971 .aborted = true, 1972 }; 1973 1974 ieee80211_scan_completed(mvm->hw, &info); 1975 } 1976 1977 /* Sched scan will be restarted by mac80211 in 1978 * restart_hw, so do not report if FW is about to be 1979 * restarted. 1980 */ 1981 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1982 !mvm->fw_restart) { 1983 ieee80211_sched_scan_stopped(mvm->hw); 1984 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1985 } 1986 } 1987 } 1988 1989 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1990 { 1991 int ret; 1992 1993 if (!(mvm->scan_status & type)) 1994 return 0; 1995 1996 if (iwl_mvm_is_radio_killed(mvm)) { 1997 ret = 0; 1998 goto out; 1999 } 2000 2001 ret = iwl_mvm_scan_stop_wait(mvm, type); 2002 if (!ret) 2003 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 2004 out: 2005 /* Clear the scan status so the next scan requests will 2006 * succeed and mark the scan as stopping, so that the Rx 2007 * handler doesn't do anything, as the scan was stopped from 2008 * above. 2009 */ 2010 mvm->scan_status &= ~type; 2011 2012 if (type == IWL_MVM_SCAN_REGULAR) { 2013 /* Since the rx handler won't do anything now, we have 2014 * to release the scan reference here. 2015 */ 2016 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 2017 cancel_delayed_work(&mvm->scan_timeout_dwork); 2018 if (notify) { 2019 struct cfg80211_scan_info info = { 2020 .aborted = true, 2021 }; 2022 2023 ieee80211_scan_completed(mvm->hw, &info); 2024 } 2025 } else if (notify) { 2026 ieee80211_sched_scan_stopped(mvm->hw); 2027 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 2028 } 2029 2030 return ret; 2031 } 2032