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 * The full GNU General Public License is included in this distribution 23 * in the file called COPYING. 24 * 25 * Contact Information: 26 * Intel Linux Wireless <linuxwifi@intel.com> 27 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 28 * 29 * BSD LICENSE 30 * 31 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 32 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 33 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 34 * Copyright(c) 2018 Intel Corporation 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 41 * * Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * * Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in 45 * the documentation and/or other materials provided with the 46 * distribution. 47 * * Neither the name Intel Corporation nor the names of its 48 * contributors may be used to endorse or promote products derived 49 * from this software without specific prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 52 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 53 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 54 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 55 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 56 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 57 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 58 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 59 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 60 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 61 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 62 * 63 *****************************************************************************/ 64 65 #include <linux/etherdevice.h> 66 #include <net/mac80211.h> 67 68 #include "mvm.h" 69 #include "fw/api/scan.h" 70 #include "iwl-io.h" 71 72 #define IWL_DENSE_EBS_SCAN_RATIO 5 73 #define IWL_SPARSE_EBS_SCAN_RATIO 1 74 75 #define IWL_SCAN_DWELL_ACTIVE 10 76 #define IWL_SCAN_DWELL_PASSIVE 110 77 #define IWL_SCAN_DWELL_FRAGMENTED 44 78 #define IWL_SCAN_DWELL_EXTENDED 90 79 #define IWL_SCAN_NUM_OF_FRAGS 3 80 81 82 /* adaptive dwell max budget time [TU] for full scan */ 83 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300 84 /* adaptive dwell max budget time [TU] for directed scan */ 85 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100 86 /* adaptive dwell default APs number */ 87 #define IWL_SCAN_ADWELL_DEFAULT_N_APS 2 88 /* adaptive dwell default APs number in social channels (1, 6, 11) */ 89 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10 90 91 struct iwl_mvm_scan_timing_params { 92 u32 suspend_time; 93 u32 max_out_time; 94 }; 95 96 static struct iwl_mvm_scan_timing_params scan_timing[] = { 97 [IWL_SCAN_TYPE_UNASSOC] = { 98 .suspend_time = 0, 99 .max_out_time = 0, 100 }, 101 [IWL_SCAN_TYPE_WILD] = { 102 .suspend_time = 30, 103 .max_out_time = 120, 104 }, 105 [IWL_SCAN_TYPE_MILD] = { 106 .suspend_time = 120, 107 .max_out_time = 120, 108 }, 109 [IWL_SCAN_TYPE_FRAGMENTED] = { 110 .suspend_time = 95, 111 .max_out_time = 44, 112 }, 113 [IWL_SCAN_TYPE_FAST_BALANCE] = { 114 .suspend_time = 30, 115 .max_out_time = 37, 116 }, 117 }; 118 119 struct iwl_mvm_scan_params { 120 /* For CDB this is low band scan type, for non-CDB - type. */ 121 enum iwl_mvm_scan_type type; 122 enum iwl_mvm_scan_type hb_type; 123 u32 n_channels; 124 u16 delay; 125 int n_ssids; 126 struct cfg80211_ssid *ssids; 127 struct ieee80211_channel **channels; 128 u32 flags; 129 u8 *mac_addr; 130 u8 *mac_addr_mask; 131 bool no_cck; 132 bool pass_all; 133 int n_match_sets; 134 struct iwl_scan_probe_req preq; 135 struct cfg80211_match_set *match_sets; 136 int n_scan_plans; 137 struct cfg80211_sched_scan_plan *scan_plans; 138 u32 measurement_dwell; 139 }; 140 141 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm) 142 { 143 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 144 145 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 146 return (void *)&cmd->v8.data; 147 148 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 149 return (void *)&cmd->v7.data; 150 151 if (iwl_mvm_cdb_scan_api(mvm)) 152 return (void *)&cmd->v6.data; 153 154 return (void *)&cmd->v1.data; 155 } 156 157 static inline struct iwl_scan_umac_chan_param * 158 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm) 159 { 160 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 161 162 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 163 return &cmd->v8.channel; 164 165 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 166 return &cmd->v7.channel; 167 168 if (iwl_mvm_cdb_scan_api(mvm)) 169 return &cmd->v6.channel; 170 171 return &cmd->v1.channel; 172 } 173 174 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 175 { 176 if (mvm->scan_rx_ant != ANT_NONE) 177 return mvm->scan_rx_ant; 178 return iwl_mvm_get_valid_rx_ant(mvm); 179 } 180 181 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 182 { 183 u16 rx_chain; 184 u8 rx_ant; 185 186 rx_ant = iwl_mvm_scan_rx_ant(mvm); 187 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 188 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 189 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 190 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 191 return cpu_to_le16(rx_chain); 192 } 193 194 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band) 195 { 196 if (band == NL80211_BAND_2GHZ) 197 return cpu_to_le32(PHY_BAND_24); 198 else 199 return cpu_to_le32(PHY_BAND_5); 200 } 201 202 static inline __le32 203 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, 204 bool no_cck) 205 { 206 u32 tx_ant; 207 208 mvm->scan_last_antenna_idx = 209 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 210 mvm->scan_last_antenna_idx); 211 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 212 213 if (band == NL80211_BAND_2GHZ && !no_cck) 214 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 215 tx_ant); 216 else 217 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 218 } 219 220 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 221 struct ieee80211_vif *vif) 222 { 223 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 224 int *global_cnt = data; 225 226 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 227 mvmvif->phy_ctxt->id < NUM_PHY_CTX) 228 *global_cnt += 1; 229 } 230 231 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 232 { 233 return mvm->tcm.result.global_load; 234 } 235 236 static enum iwl_mvm_traffic_load 237 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band) 238 { 239 return mvm->tcm.result.band_load[band]; 240 } 241 242 struct iwl_is_dcm_with_go_iterator_data { 243 struct ieee80211_vif *current_vif; 244 bool is_dcm_with_p2p_go; 245 }; 246 247 static void iwl_mvm_is_dcm_with_go_iterator(void *_data, u8 *mac, 248 struct ieee80211_vif *vif) 249 { 250 struct iwl_is_dcm_with_go_iterator_data *data = _data; 251 struct iwl_mvm_vif *other_mvmvif = iwl_mvm_vif_from_mac80211(vif); 252 struct iwl_mvm_vif *curr_mvmvif = 253 iwl_mvm_vif_from_mac80211(data->current_vif); 254 255 /* exclude the given vif */ 256 if (vif == data->current_vif) 257 return; 258 259 if (vif->type == NL80211_IFTYPE_AP && vif->p2p && 260 other_mvmvif->phy_ctxt && curr_mvmvif->phy_ctxt && 261 other_mvmvif->phy_ctxt->id != curr_mvmvif->phy_ctxt->id) 262 data->is_dcm_with_p2p_go = true; 263 } 264 265 static enum 266 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm, 267 struct ieee80211_vif *vif, 268 enum iwl_mvm_traffic_load load, 269 bool low_latency) 270 { 271 int global_cnt = 0; 272 273 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 274 IEEE80211_IFACE_ITER_NORMAL, 275 iwl_mvm_scan_condition_iterator, 276 &global_cnt); 277 if (!global_cnt) 278 return IWL_SCAN_TYPE_UNASSOC; 279 280 if (fw_has_api(&mvm->fw->ucode_capa, 281 IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) { 282 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && 283 (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE)) 284 return IWL_SCAN_TYPE_FRAGMENTED; 285 286 /* in case of DCM with GO where BSS DTIM interval < 220msec 287 * set all scan requests as fast-balance scan 288 * */ 289 if (vif && vif->type == NL80211_IFTYPE_STATION && 290 vif->bss_conf.dtim_period < 220) { 291 struct iwl_is_dcm_with_go_iterator_data data = { 292 .current_vif = vif, 293 .is_dcm_with_p2p_go = false, 294 }; 295 296 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 297 IEEE80211_IFACE_ITER_NORMAL, 298 iwl_mvm_is_dcm_with_go_iterator, 299 &data); 300 if (data.is_dcm_with_p2p_go) 301 return IWL_SCAN_TYPE_FAST_BALANCE; 302 } 303 } 304 305 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 306 return IWL_SCAN_TYPE_MILD; 307 308 return IWL_SCAN_TYPE_WILD; 309 } 310 311 static enum 312 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, 313 struct ieee80211_vif *vif) 314 { 315 enum iwl_mvm_traffic_load load; 316 bool low_latency; 317 318 load = iwl_mvm_get_traffic_load(mvm); 319 low_latency = iwl_mvm_low_latency(mvm); 320 321 return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency); 322 } 323 324 static enum 325 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm, 326 struct ieee80211_vif *vif, 327 enum nl80211_band band) 328 { 329 enum iwl_mvm_traffic_load load; 330 bool low_latency; 331 332 load = iwl_mvm_get_traffic_load_band(mvm, band); 333 low_latency = iwl_mvm_low_latency_band(mvm, band); 334 335 return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency); 336 } 337 338 static int 339 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm, 340 struct cfg80211_scan_request *req, 341 struct iwl_mvm_scan_params *params) 342 { 343 u32 duration = scan_timing[params->type].max_out_time; 344 345 if (!req->duration) 346 return 0; 347 348 if (iwl_mvm_is_cdb_supported(mvm)) { 349 u32 hb_time = scan_timing[params->hb_type].max_out_time; 350 351 duration = min_t(u32, duration, hb_time); 352 } 353 354 if (req->duration_mandatory && req->duration > duration) { 355 IWL_DEBUG_SCAN(mvm, 356 "Measurement scan - too long dwell %hu (max out time %u)\n", 357 req->duration, 358 duration); 359 return -EOPNOTSUPP; 360 } 361 362 return min_t(u32, (u32)req->duration, duration); 363 } 364 365 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 366 { 367 /* require rrm scan whenever the fw supports it */ 368 return fw_has_capa(&mvm->fw->ucode_capa, 369 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 370 } 371 372 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 373 { 374 int max_probe_len; 375 376 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 377 378 /* we create the 802.11 header and SSID element */ 379 max_probe_len -= 24 + 2; 380 381 /* DS parameter set element is added on 2.4GHZ band if required */ 382 if (iwl_mvm_rrm_scan_needed(mvm)) 383 max_probe_len -= 3; 384 385 return max_probe_len; 386 } 387 388 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 389 { 390 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 391 392 /* TODO: [BUG] This function should return the maximum allowed size of 393 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 394 * in the same command. So the correct implementation of this function 395 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 396 * command has only 512 bytes and it would leave us with about 240 397 * bytes for scan IEs, which is clearly not enough. So meanwhile 398 * we will report an incorrect value. This may result in a failure to 399 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 400 * functions with -ENOBUFS, if a large enough probe will be provided. 401 */ 402 return max_ie_len; 403 } 404 405 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 406 struct iwl_rx_cmd_buffer *rxb) 407 { 408 struct iwl_rx_packet *pkt = rxb_addr(rxb); 409 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 410 411 IWL_DEBUG_SCAN(mvm, 412 "Scan offload iteration complete: status=0x%x scanned channels=%d\n", 413 notif->status, notif->scanned_channels); 414 415 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 416 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 417 ieee80211_sched_scan_results(mvm->hw); 418 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 419 } 420 } 421 422 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 423 struct iwl_rx_cmd_buffer *rxb) 424 { 425 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 426 ieee80211_sched_scan_results(mvm->hw); 427 } 428 429 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 430 { 431 switch (status) { 432 case IWL_SCAN_EBS_SUCCESS: 433 return "successful"; 434 case IWL_SCAN_EBS_INACTIVE: 435 return "inactive"; 436 case IWL_SCAN_EBS_FAILED: 437 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 438 default: 439 return "failed"; 440 } 441 } 442 443 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 444 struct iwl_rx_cmd_buffer *rxb) 445 { 446 struct iwl_rx_packet *pkt = rxb_addr(rxb); 447 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 448 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 449 450 /* If this happens, the firmware has mistakenly sent an LMAC 451 * notification during UMAC scans -- warn and ignore it. 452 */ 453 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 454 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 455 return; 456 457 /* scan status must be locked for proper checking */ 458 lockdep_assert_held(&mvm->mutex); 459 460 /* We first check if we were stopping a scan, in which case we 461 * just clear the stopping flag. Then we check if it was a 462 * firmware initiated stop, in which case we need to inform 463 * mac80211. 464 * Note that we can have a stopping and a running scan 465 * simultaneously, but we can't have two different types of 466 * scans stopping or running at the same time (since LMAC 467 * doesn't support it). 468 */ 469 470 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 471 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 472 473 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 474 aborted ? "aborted" : "completed", 475 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 476 IWL_DEBUG_SCAN(mvm, 477 "Last line %d, Last iteration %d, Time after last iteration %d\n", 478 scan_notif->last_schedule_line, 479 scan_notif->last_schedule_iteration, 480 __le32_to_cpu(scan_notif->time_after_last_iter)); 481 482 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 483 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 484 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 485 aborted ? "aborted" : "completed", 486 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 487 488 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 489 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 490 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 491 492 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 493 aborted ? "aborted" : "completed", 494 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 495 IWL_DEBUG_SCAN(mvm, 496 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 497 scan_notif->last_schedule_line, 498 scan_notif->last_schedule_iteration, 499 __le32_to_cpu(scan_notif->time_after_last_iter)); 500 501 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 502 ieee80211_sched_scan_stopped(mvm->hw); 503 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 504 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 505 struct cfg80211_scan_info info = { 506 .aborted = aborted, 507 }; 508 509 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 510 aborted ? "aborted" : "completed", 511 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 512 513 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 514 ieee80211_scan_completed(mvm->hw, &info); 515 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 516 cancel_delayed_work(&mvm->scan_timeout_dwork); 517 iwl_mvm_resume_tcm(mvm); 518 } else { 519 IWL_ERR(mvm, 520 "got scan complete notification but no scan is running\n"); 521 } 522 523 mvm->last_ebs_successful = 524 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 525 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 526 } 527 528 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 529 { 530 int i; 531 532 for (i = 0; i < PROBE_OPTION_MAX; i++) { 533 if (!ssid_list[i].len) 534 break; 535 if (ssid_list[i].len == ssid_len && 536 !memcmp(ssid_list->ssid, ssid, ssid_len)) 537 return i; 538 } 539 return -1; 540 } 541 542 /* We insert the SSIDs in an inverted order, because the FW will 543 * invert it back. 544 */ 545 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 546 struct iwl_ssid_ie *ssids, 547 u32 *ssid_bitmap) 548 { 549 int i, j; 550 int index; 551 552 /* 553 * copy SSIDs from match list. 554 * iwl_config_sched_scan_profiles() uses the order of these ssids to 555 * config match list. 556 */ 557 for (i = 0, j = params->n_match_sets - 1; 558 j >= 0 && i < PROBE_OPTION_MAX; 559 i++, j--) { 560 /* skip empty SSID matchsets */ 561 if (!params->match_sets[j].ssid.ssid_len) 562 continue; 563 ssids[i].id = WLAN_EID_SSID; 564 ssids[i].len = params->match_sets[j].ssid.ssid_len; 565 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 566 ssids[i].len); 567 } 568 569 /* add SSIDs from scan SSID list */ 570 *ssid_bitmap = 0; 571 for (j = params->n_ssids - 1; 572 j >= 0 && i < PROBE_OPTION_MAX; 573 i++, j--) { 574 index = iwl_ssid_exist(params->ssids[j].ssid, 575 params->ssids[j].ssid_len, 576 ssids); 577 if (index < 0) { 578 ssids[i].id = WLAN_EID_SSID; 579 ssids[i].len = params->ssids[j].ssid_len; 580 memcpy(ssids[i].ssid, params->ssids[j].ssid, 581 ssids[i].len); 582 *ssid_bitmap |= BIT(i); 583 } else { 584 *ssid_bitmap |= BIT(index); 585 } 586 } 587 } 588 589 static int 590 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 591 struct cfg80211_sched_scan_request *req) 592 { 593 struct iwl_scan_offload_profile *profile; 594 struct iwl_scan_offload_profile_cfg *profile_cfg; 595 struct iwl_scan_offload_blacklist *blacklist; 596 struct iwl_host_cmd cmd = { 597 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 598 .len[1] = sizeof(*profile_cfg), 599 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 600 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 601 }; 602 int blacklist_len; 603 int i; 604 int ret; 605 606 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 607 return -EIO; 608 609 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 610 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 611 else 612 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 613 614 blacklist = kcalloc(blacklist_len, sizeof(*blacklist), GFP_KERNEL); 615 if (!blacklist) 616 return -ENOMEM; 617 618 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 619 if (!profile_cfg) { 620 ret = -ENOMEM; 621 goto free_blacklist; 622 } 623 624 cmd.data[0] = blacklist; 625 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 626 cmd.data[1] = profile_cfg; 627 628 /* No blacklist configuration */ 629 630 profile_cfg->num_profiles = req->n_match_sets; 631 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 632 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 633 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 634 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 635 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 636 637 for (i = 0; i < req->n_match_sets; i++) { 638 profile = &profile_cfg->profiles[i]; 639 profile->ssid_index = i; 640 /* Support any cipher and auth algorithm */ 641 profile->unicast_cipher = 0xff; 642 profile->auth_alg = 0xff; 643 profile->network_type = IWL_NETWORK_TYPE_ANY; 644 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 645 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 646 } 647 648 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 649 650 ret = iwl_mvm_send_cmd(mvm, &cmd); 651 kfree(profile_cfg); 652 free_blacklist: 653 kfree(blacklist); 654 655 return ret; 656 } 657 658 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 659 struct cfg80211_sched_scan_request *req) 660 { 661 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 662 IWL_DEBUG_SCAN(mvm, 663 "Sending scheduled scan with filtering, n_match_sets %d\n", 664 req->n_match_sets); 665 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 666 return false; 667 } 668 669 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 670 671 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 672 return true; 673 } 674 675 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 676 { 677 int ret; 678 struct iwl_host_cmd cmd = { 679 .id = SCAN_OFFLOAD_ABORT_CMD, 680 }; 681 u32 status = CAN_ABORT_STATUS; 682 683 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 684 if (ret) 685 return ret; 686 687 if (status != CAN_ABORT_STATUS) { 688 /* 689 * The scan abort will return 1 for success or 690 * 2 for "failure". A failure condition can be 691 * due to simply not being in an active scan which 692 * can occur if we send the scan abort before the 693 * microcode has notified us that a scan is completed. 694 */ 695 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 696 ret = -ENOENT; 697 } 698 699 return ret; 700 } 701 702 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 703 struct iwl_scan_req_tx_cmd *tx_cmd, 704 bool no_cck) 705 { 706 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 707 TX_CMD_FLG_BT_DIS); 708 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 709 NL80211_BAND_2GHZ, 710 no_cck); 711 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 712 713 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 714 TX_CMD_FLG_BT_DIS); 715 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 716 NL80211_BAND_5GHZ, 717 no_cck); 718 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 719 } 720 721 static void 722 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 723 struct ieee80211_channel **channels, 724 int n_channels, u32 ssid_bitmap, 725 struct iwl_scan_req_lmac *cmd) 726 { 727 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 728 int i; 729 730 for (i = 0; i < n_channels; i++) { 731 channel_cfg[i].channel_num = 732 cpu_to_le16(channels[i]->hw_value); 733 channel_cfg[i].iter_count = cpu_to_le16(1); 734 channel_cfg[i].iter_interval = 0; 735 channel_cfg[i].flags = 736 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 737 ssid_bitmap); 738 } 739 } 740 741 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 742 size_t len, u8 *const pos) 743 { 744 static const u8 before_ds_params[] = { 745 WLAN_EID_SSID, 746 WLAN_EID_SUPP_RATES, 747 WLAN_EID_REQUEST, 748 WLAN_EID_EXT_SUPP_RATES, 749 }; 750 size_t offs; 751 u8 *newpos = pos; 752 753 if (!iwl_mvm_rrm_scan_needed(mvm)) { 754 memcpy(newpos, ies, len); 755 return newpos + len; 756 } 757 758 offs = ieee80211_ie_split(ies, len, 759 before_ds_params, 760 ARRAY_SIZE(before_ds_params), 761 0); 762 763 memcpy(newpos, ies, offs); 764 newpos += offs; 765 766 /* Add a placeholder for DS Parameter Set element */ 767 *newpos++ = WLAN_EID_DS_PARAMS; 768 *newpos++ = 1; 769 *newpos++ = 0; 770 771 memcpy(newpos, ies + offs, len - offs); 772 newpos += len - offs; 773 774 return newpos; 775 } 776 777 #define WFA_TPC_IE_LEN 9 778 779 static void iwl_mvm_add_tpc_report_ie(u8 *pos) 780 { 781 pos[0] = WLAN_EID_VENDOR_SPECIFIC; 782 pos[1] = WFA_TPC_IE_LEN - 2; 783 pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff; 784 pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff; 785 pos[4] = WLAN_OUI_MICROSOFT & 0xff; 786 pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC; 787 pos[6] = 0; 788 /* pos[7] - tx power will be inserted by the FW */ 789 pos[7] = 0; 790 pos[8] = 0; 791 } 792 793 static void 794 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 795 struct ieee80211_scan_ies *ies, 796 struct iwl_mvm_scan_params *params) 797 { 798 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 799 u8 *pos, *newpos; 800 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 801 params->mac_addr : NULL; 802 803 /* 804 * Unfortunately, right now the offload scan doesn't support randomising 805 * within the firmware, so until the firmware API is ready we implement 806 * it in the driver. This means that the scan iterations won't really be 807 * random, only when it's restarted, but at least that helps a bit. 808 */ 809 if (mac_addr) 810 get_random_mask_addr(frame->sa, mac_addr, 811 params->mac_addr_mask); 812 else 813 memcpy(frame->sa, vif->addr, ETH_ALEN); 814 815 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 816 eth_broadcast_addr(frame->da); 817 eth_broadcast_addr(frame->bssid); 818 frame->seq_ctrl = 0; 819 820 pos = frame->u.probe_req.variable; 821 *pos++ = WLAN_EID_SSID; 822 *pos++ = 0; 823 824 params->preq.mac_header.offset = 0; 825 params->preq.mac_header.len = cpu_to_le16(24 + 2); 826 827 /* Insert ds parameter set element on 2.4 GHz band */ 828 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 829 ies->ies[NL80211_BAND_2GHZ], 830 ies->len[NL80211_BAND_2GHZ], 831 pos); 832 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 833 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 834 pos = newpos; 835 836 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 837 ies->len[NL80211_BAND_5GHZ]); 838 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 839 params->preq.band_data[1].len = 840 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 841 pos += ies->len[NL80211_BAND_5GHZ]; 842 843 memcpy(pos, ies->common_ies, ies->common_ie_len); 844 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 845 846 if (iwl_mvm_rrm_scan_needed(mvm) && 847 !fw_has_capa(&mvm->fw->ucode_capa, 848 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) { 849 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len); 850 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len + 851 WFA_TPC_IE_LEN); 852 } else { 853 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 854 } 855 } 856 857 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 858 struct iwl_scan_req_lmac *cmd, 859 struct iwl_mvm_scan_params *params) 860 { 861 cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE; 862 cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE; 863 cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 864 cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED; 865 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 866 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 867 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 868 } 869 870 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 871 struct ieee80211_scan_ies *ies, 872 int n_channels) 873 { 874 return ((n_ssids <= PROBE_OPTION_MAX) && 875 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 876 (ies->common_ie_len + 877 ies->len[NL80211_BAND_2GHZ] + 878 ies->len[NL80211_BAND_5GHZ] <= 879 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 880 } 881 882 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 883 struct ieee80211_vif *vif) 884 { 885 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 886 bool low_latency; 887 888 if (iwl_mvm_is_cdb_supported(mvm)) 889 low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ); 890 else 891 low_latency = iwl_mvm_low_latency(mvm); 892 893 /* We can only use EBS if: 894 * 1. the feature is supported; 895 * 2. the last EBS was successful; 896 * 3. if only single scan, the single scan EBS API is supported; 897 * 4. it's not a p2p find operation. 898 * 5. we are not in low latency mode, 899 * or if fragmented ebs is supported by the FW 900 */ 901 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 902 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS && 903 vif->type != NL80211_IFTYPE_P2P_DEVICE && 904 (!low_latency || iwl_mvm_is_frag_ebs_supported(mvm))); 905 } 906 907 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 908 { 909 return params->n_scan_plans == 1 && 910 params->scan_plans[0].iterations == 1; 911 } 912 913 static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type) 914 { 915 return (type == IWL_SCAN_TYPE_FRAGMENTED || 916 type == IWL_SCAN_TYPE_FAST_BALANCE); 917 } 918 919 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 920 struct iwl_mvm_scan_params *params, 921 struct ieee80211_vif *vif) 922 { 923 int flags = 0; 924 925 if (params->n_ssids == 0) 926 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 927 928 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 929 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 930 931 if (iwl_mvm_is_scan_fragmented(params->type)) 932 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 933 934 if (iwl_mvm_rrm_scan_needed(mvm) && 935 fw_has_capa(&mvm->fw->ucode_capa, 936 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 937 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 938 939 if (params->pass_all) 940 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 941 else 942 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 943 944 #ifdef CONFIG_IWLWIFI_DEBUGFS 945 if (mvm->scan_iter_notif_enabled) 946 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 947 #endif 948 949 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 950 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 951 952 if (iwl_mvm_is_regular_scan(params) && 953 vif->type != NL80211_IFTYPE_P2P_DEVICE && 954 !iwl_mvm_is_scan_fragmented(params->type)) 955 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 956 957 return flags; 958 } 959 960 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 961 struct iwl_mvm_scan_params *params) 962 { 963 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 964 struct iwl_scan_probe_req *preq = 965 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 966 mvm->fw->ucode_capa.n_scan_channels); 967 u32 ssid_bitmap = 0; 968 int i; 969 970 lockdep_assert_held(&mvm->mutex); 971 972 memset(cmd, 0, ksize(cmd)); 973 974 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 975 return -EINVAL; 976 977 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 978 979 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 980 cmd->iter_num = cpu_to_le32(1); 981 cmd->n_channels = (u8)params->n_channels; 982 983 cmd->delay = cpu_to_le32(params->delay); 984 985 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 986 vif)); 987 988 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 989 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 990 MAC_FILTER_IN_BEACON); 991 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 992 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 993 994 /* this API uses bits 1-20 instead of 0-19 */ 995 ssid_bitmap <<= 1; 996 997 for (i = 0; i < params->n_scan_plans; i++) { 998 struct cfg80211_sched_scan_plan *scan_plan = 999 ¶ms->scan_plans[i]; 1000 1001 cmd->schedule[i].delay = 1002 cpu_to_le16(scan_plan->interval); 1003 cmd->schedule[i].iterations = scan_plan->iterations; 1004 cmd->schedule[i].full_scan_mul = 1; 1005 } 1006 1007 /* 1008 * If the number of iterations of the last scan plan is set to 1009 * zero, it should run infinitely. However, this is not always the case. 1010 * For example, when regular scan is requested the driver sets one scan 1011 * plan with one iteration. 1012 */ 1013 if (!cmd->schedule[i - 1].iterations) 1014 cmd->schedule[i - 1].iterations = 0xff; 1015 1016 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 1017 cmd->channel_opt[0].flags = 1018 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 1019 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1020 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 1021 cmd->channel_opt[0].non_ebs_ratio = 1022 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 1023 cmd->channel_opt[1].flags = 1024 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 1025 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1026 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 1027 cmd->channel_opt[1].non_ebs_ratio = 1028 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 1029 } 1030 1031 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 1032 params->n_channels, ssid_bitmap, cmd); 1033 1034 *preq = params->preq; 1035 1036 return 0; 1037 } 1038 1039 static int rate_to_scan_rate_flag(unsigned int rate) 1040 { 1041 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 1042 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 1043 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 1044 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 1045 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 1046 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 1047 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 1048 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 1049 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 1050 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 1051 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 1052 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 1053 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 1054 }; 1055 1056 return rate_to_scan_rate[rate]; 1057 } 1058 1059 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 1060 { 1061 struct ieee80211_supported_band *band; 1062 unsigned int rates = 0; 1063 int i; 1064 1065 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1066 for (i = 0; i < band->n_bitrates; i++) 1067 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 1068 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1069 for (i = 0; i < band->n_bitrates; i++) 1070 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 1071 1072 /* Set both basic rates and supported rates */ 1073 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 1074 1075 return cpu_to_le32(rates); 1076 } 1077 1078 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm, 1079 struct iwl_scan_dwell *dwell) 1080 { 1081 dwell->active = IWL_SCAN_DWELL_ACTIVE; 1082 dwell->passive = IWL_SCAN_DWELL_PASSIVE; 1083 dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED; 1084 dwell->extended = IWL_SCAN_DWELL_EXTENDED; 1085 } 1086 1087 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels) 1088 { 1089 struct ieee80211_supported_band *band; 1090 int i, j = 0; 1091 1092 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1093 for (i = 0; i < band->n_channels; i++, j++) 1094 channels[j] = band->channels[i].hw_value; 1095 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1096 for (i = 0; i < band->n_channels; i++, j++) 1097 channels[j] = band->channels[i].hw_value; 1098 } 1099 1100 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config, 1101 u32 flags, u8 channel_flags) 1102 { 1103 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL); 1104 struct iwl_scan_config_v1 *cfg = config; 1105 1106 cfg->flags = cpu_to_le32(flags); 1107 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1108 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1109 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1110 cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time); 1111 cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 1112 1113 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1114 1115 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1116 1117 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1118 cfg->channel_flags = channel_flags; 1119 1120 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1121 } 1122 1123 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config, 1124 u32 flags, u8 channel_flags) 1125 { 1126 struct iwl_scan_config *cfg = config; 1127 1128 cfg->flags = cpu_to_le32(flags); 1129 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1130 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1131 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1132 1133 if (iwl_mvm_is_cdb_supported(mvm)) { 1134 enum iwl_mvm_scan_type lb_type, hb_type; 1135 1136 lb_type = iwl_mvm_get_scan_type_band(mvm, NULL, 1137 NL80211_BAND_2GHZ); 1138 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL, 1139 NL80211_BAND_5GHZ); 1140 1141 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = 1142 cpu_to_le32(scan_timing[lb_type].max_out_time); 1143 cfg->suspend_time[SCAN_LB_LMAC_IDX] = 1144 cpu_to_le32(scan_timing[lb_type].suspend_time); 1145 1146 cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] = 1147 cpu_to_le32(scan_timing[hb_type].max_out_time); 1148 cfg->suspend_time[SCAN_HB_LMAC_IDX] = 1149 cpu_to_le32(scan_timing[hb_type].suspend_time); 1150 } else { 1151 enum iwl_mvm_scan_type type = 1152 iwl_mvm_get_scan_type(mvm, NULL); 1153 1154 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = 1155 cpu_to_le32(scan_timing[type].max_out_time); 1156 cfg->suspend_time[SCAN_LB_LMAC_IDX] = 1157 cpu_to_le32(scan_timing[type].suspend_time); 1158 } 1159 1160 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1161 1162 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1163 1164 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1165 cfg->channel_flags = channel_flags; 1166 1167 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1168 } 1169 1170 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 1171 { 1172 void *cfg; 1173 int ret, cmd_size; 1174 struct iwl_host_cmd cmd = { 1175 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 1176 }; 1177 enum iwl_mvm_scan_type type; 1178 enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET; 1179 int num_channels = 1180 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 1181 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 1182 u32 flags; 1183 u8 channel_flags; 1184 1185 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 1186 return -ENOBUFS; 1187 1188 if (iwl_mvm_is_cdb_supported(mvm)) { 1189 type = iwl_mvm_get_scan_type_band(mvm, NULL, 1190 NL80211_BAND_2GHZ); 1191 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL, 1192 NL80211_BAND_5GHZ); 1193 if (type == mvm->scan_type && hb_type == mvm->hb_scan_type) 1194 return 0; 1195 } else { 1196 type = iwl_mvm_get_scan_type(mvm, NULL); 1197 if (type == mvm->scan_type) 1198 return 0; 1199 } 1200 1201 if (iwl_mvm_cdb_scan_api(mvm)) 1202 cmd_size = sizeof(struct iwl_scan_config); 1203 else 1204 cmd_size = sizeof(struct iwl_scan_config_v1); 1205 cmd_size += mvm->fw->ucode_capa.n_scan_channels; 1206 1207 cfg = kzalloc(cmd_size, GFP_KERNEL); 1208 if (!cfg) 1209 return -ENOMEM; 1210 1211 flags = SCAN_CONFIG_FLAG_ACTIVATE | 1212 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 1213 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 1214 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 1215 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 1216 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 1217 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 1218 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 1219 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS | 1220 SCAN_CONFIG_N_CHANNELS(num_channels) | 1221 (iwl_mvm_is_scan_fragmented(type) ? 1222 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 1223 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 1224 1225 channel_flags = IWL_CHANNEL_FLAG_EBS | 1226 IWL_CHANNEL_FLAG_ACCURATE_EBS | 1227 IWL_CHANNEL_FLAG_EBS_ADD | 1228 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 1229 1230 /* 1231 * Check for fragmented scan on LMAC2 - high band. 1232 * LMAC1 - low band is checked above. 1233 */ 1234 if (iwl_mvm_cdb_scan_api(mvm)) { 1235 if (iwl_mvm_is_cdb_supported(mvm)) 1236 flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ? 1237 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED : 1238 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED; 1239 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags); 1240 } else { 1241 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags); 1242 } 1243 1244 cmd.data[0] = cfg; 1245 cmd.len[0] = cmd_size; 1246 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1247 1248 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1249 1250 ret = iwl_mvm_send_cmd(mvm, &cmd); 1251 if (!ret) { 1252 mvm->scan_type = type; 1253 mvm->hb_scan_type = hb_type; 1254 } 1255 1256 kfree(cfg); 1257 return ret; 1258 } 1259 1260 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1261 { 1262 int i; 1263 1264 for (i = 0; i < mvm->max_scans; i++) 1265 if (mvm->scan_uid_status[i] == status) 1266 return i; 1267 1268 return -ENOENT; 1269 } 1270 1271 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1272 struct iwl_scan_req_umac *cmd, 1273 struct iwl_mvm_scan_params *params) 1274 { 1275 struct iwl_mvm_scan_timing_params *timing, *hb_timing; 1276 u8 active_dwell, passive_dwell; 1277 1278 timing = &scan_timing[params->type]; 1279 active_dwell = params->measurement_dwell ? 1280 params->measurement_dwell : IWL_SCAN_DWELL_ACTIVE; 1281 passive_dwell = params->measurement_dwell ? 1282 params->measurement_dwell : IWL_SCAN_DWELL_PASSIVE; 1283 1284 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1285 cmd->v7.adwell_default_n_aps_social = 1286 IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL; 1287 cmd->v7.adwell_default_n_aps = 1288 IWL_SCAN_ADWELL_DEFAULT_N_APS; 1289 1290 /* if custom max budget was configured with debugfs */ 1291 if (IWL_MVM_ADWELL_MAX_BUDGET) 1292 cmd->v7.adwell_max_budget = 1293 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET); 1294 else if (params->ssids && params->ssids[0].ssid_len) 1295 cmd->v7.adwell_max_budget = 1296 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN); 1297 else 1298 cmd->v7.adwell_max_budget = 1299 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN); 1300 1301 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1302 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] = 1303 cpu_to_le32(timing->max_out_time); 1304 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] = 1305 cpu_to_le32(timing->suspend_time); 1306 1307 if (iwl_mvm_is_cdb_supported(mvm)) { 1308 hb_timing = &scan_timing[params->hb_type]; 1309 1310 cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] = 1311 cpu_to_le32(hb_timing->max_out_time); 1312 cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] = 1313 cpu_to_le32(hb_timing->suspend_time); 1314 } 1315 1316 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1317 cmd->v7.active_dwell = active_dwell; 1318 cmd->v7.passive_dwell = passive_dwell; 1319 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1320 } else { 1321 cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell; 1322 cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell; 1323 if (iwl_mvm_is_cdb_supported(mvm)) { 1324 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] = 1325 active_dwell; 1326 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] = 1327 passive_dwell; 1328 } 1329 } 1330 } else { 1331 cmd->v1.extended_dwell = params->measurement_dwell ? 1332 params->measurement_dwell : IWL_SCAN_DWELL_EXTENDED; 1333 cmd->v1.active_dwell = active_dwell; 1334 cmd->v1.passive_dwell = passive_dwell; 1335 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1336 1337 if (iwl_mvm_is_cdb_supported(mvm)) { 1338 hb_timing = &scan_timing[params->hb_type]; 1339 1340 cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] = 1341 cpu_to_le32(hb_timing->max_out_time); 1342 cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] = 1343 cpu_to_le32(hb_timing->suspend_time); 1344 } 1345 1346 if (iwl_mvm_cdb_scan_api(mvm)) { 1347 cmd->v6.scan_priority = 1348 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1349 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] = 1350 cpu_to_le32(timing->max_out_time); 1351 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] = 1352 cpu_to_le32(timing->suspend_time); 1353 } else { 1354 cmd->v1.scan_priority = 1355 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1356 cmd->v1.max_out_time = 1357 cpu_to_le32(timing->max_out_time); 1358 cmd->v1.suspend_time = 1359 cpu_to_le32(timing->suspend_time); 1360 } 1361 } 1362 1363 if (iwl_mvm_is_regular_scan(params)) 1364 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1365 else 1366 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2); 1367 } 1368 1369 static void 1370 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1371 struct ieee80211_channel **channels, 1372 int n_channels, u32 ssid_bitmap, 1373 struct iwl_scan_channel_cfg_umac *channel_cfg) 1374 { 1375 int i; 1376 1377 for (i = 0; i < n_channels; i++) { 1378 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1379 channel_cfg[i].channel_num = channels[i]->hw_value; 1380 channel_cfg[i].iter_count = 1; 1381 channel_cfg[i].iter_interval = 0; 1382 } 1383 } 1384 1385 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1386 struct iwl_mvm_scan_params *params, 1387 struct ieee80211_vif *vif) 1388 { 1389 u16 flags = 0; 1390 1391 if (params->n_ssids == 0) 1392 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1393 1394 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1395 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1396 1397 if (iwl_mvm_is_scan_fragmented(params->type)) 1398 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1399 1400 if (iwl_mvm_is_cdb_supported(mvm) && 1401 iwl_mvm_is_scan_fragmented(params->hb_type)) 1402 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED; 1403 1404 if (iwl_mvm_rrm_scan_needed(mvm) && 1405 fw_has_capa(&mvm->fw->ucode_capa, 1406 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 1407 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1408 1409 if (params->pass_all) 1410 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1411 else 1412 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1413 1414 if (!iwl_mvm_is_regular_scan(params)) 1415 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1416 1417 if (params->measurement_dwell) 1418 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1419 1420 #ifdef CONFIG_IWLWIFI_DEBUGFS 1421 if (mvm->scan_iter_notif_enabled) 1422 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1423 #endif 1424 1425 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1426 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1427 1428 if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE && 1429 vif->type != NL80211_IFTYPE_P2P_DEVICE) 1430 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL; 1431 1432 /* 1433 * Extended dwell is relevant only for low band to start with, as it is 1434 * being used for social channles only (1, 6, 11), so we can check 1435 * only scan type on low band also for CDB. 1436 */ 1437 if (iwl_mvm_is_regular_scan(params) && 1438 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1439 !iwl_mvm_is_scan_fragmented(params->type) && 1440 !iwl_mvm_is_adaptive_dwell_supported(mvm) && 1441 !iwl_mvm_is_oce_supported(mvm)) 1442 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1443 1444 if (iwl_mvm_is_oce_supported(mvm)) { 1445 if ((params->flags & 1446 NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE)) 1447 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE; 1448 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and 1449 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares 1450 * the same bit, we need to make sure that we use this bit here 1451 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be 1452 * used. */ 1453 if ((params->flags & 1454 NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) && 1455 !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm))) 1456 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP; 1457 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)) 1458 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME; 1459 } 1460 1461 return flags; 1462 } 1463 1464 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1465 struct iwl_mvm_scan_params *params, 1466 int type) 1467 { 1468 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1469 struct iwl_scan_umac_chan_param *chan_param; 1470 void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm); 1471 struct iwl_scan_req_umac_tail *sec_part = cmd_data + 1472 sizeof(struct iwl_scan_channel_cfg_umac) * 1473 mvm->fw->ucode_capa.n_scan_channels; 1474 int uid, i; 1475 u32 ssid_bitmap = 0; 1476 u8 channel_flags = 0; 1477 u16 gen_flags; 1478 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); 1479 1480 chan_param = iwl_mvm_get_scan_req_umac_channel(mvm); 1481 1482 lockdep_assert_held(&mvm->mutex); 1483 1484 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1485 return -EINVAL; 1486 1487 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1488 if (uid < 0) 1489 return uid; 1490 1491 memset(cmd, 0, ksize(cmd)); 1492 1493 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1494 1495 mvm->scan_uid_status[uid] = type; 1496 1497 cmd->uid = cpu_to_le32(uid); 1498 gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif); 1499 cmd->general_flags = cpu_to_le16(gen_flags); 1500 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1501 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED) 1502 cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] = 1503 IWL_SCAN_NUM_OF_FRAGS; 1504 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED) 1505 cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] = 1506 IWL_SCAN_NUM_OF_FRAGS; 1507 1508 cmd->v8.general_flags2 = 1509 IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER; 1510 } 1511 1512 cmd->scan_start_mac_id = scan_vif->id; 1513 1514 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1515 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1516 1517 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 1518 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1519 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1520 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1521 1522 /* set fragmented ebs for fragmented scan on HB channels */ 1523 if (iwl_mvm_is_frag_ebs_supported(mvm)) { 1524 if (gen_flags & 1525 IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED || 1526 (!iwl_mvm_is_cdb_supported(mvm) && 1527 gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)) 1528 channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG; 1529 } 1530 } 1531 1532 chan_param->flags = channel_flags; 1533 chan_param->count = params->n_channels; 1534 1535 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1536 1537 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1538 params->n_channels, ssid_bitmap, 1539 cmd_data); 1540 1541 for (i = 0; i < params->n_scan_plans; i++) { 1542 struct cfg80211_sched_scan_plan *scan_plan = 1543 ¶ms->scan_plans[i]; 1544 1545 sec_part->schedule[i].iter_count = scan_plan->iterations; 1546 sec_part->schedule[i].interval = 1547 cpu_to_le16(scan_plan->interval); 1548 } 1549 1550 /* 1551 * If the number of iterations of the last scan plan is set to 1552 * zero, it should run infinitely. However, this is not always the case. 1553 * For example, when regular scan is requested the driver sets one scan 1554 * plan with one iteration. 1555 */ 1556 if (!sec_part->schedule[i - 1].iter_count) 1557 sec_part->schedule[i - 1].iter_count = 0xff; 1558 1559 sec_part->delay = cpu_to_le16(params->delay); 1560 sec_part->preq = params->preq; 1561 1562 return 0; 1563 } 1564 1565 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1566 { 1567 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1568 } 1569 1570 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1571 { 1572 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa, 1573 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG); 1574 1575 /* This looks a bit arbitrary, but the idea is that if we run 1576 * out of possible simultaneous scans and the userspace is 1577 * trying to run a scan type that is already running, we 1578 * return -EBUSY. But if the userspace wants to start a 1579 * different type of scan, we stop the opposite type to make 1580 * space for the new request. The reason is backwards 1581 * compatibility with old wpa_supplicant that wouldn't stop a 1582 * scheduled scan before starting a normal scan. 1583 */ 1584 1585 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1586 return 0; 1587 1588 /* Use a switch, even though this is a bitmask, so that more 1589 * than one bits set will fall in default and we will warn. 1590 */ 1591 switch (type) { 1592 case IWL_MVM_SCAN_REGULAR: 1593 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1594 return -EBUSY; 1595 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1596 case IWL_MVM_SCAN_SCHED: 1597 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1598 return -EBUSY; 1599 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1600 case IWL_MVM_SCAN_NETDETECT: 1601 /* For non-unified images, there's no need to stop 1602 * anything for net-detect since the firmware is 1603 * restarted anyway. This way, any sched scans that 1604 * were running will be restarted when we resume. 1605 */ 1606 if (!unified_image) 1607 return 0; 1608 1609 /* If this is a unified image and we ran out of scans, 1610 * we need to stop something. Prefer stopping regular 1611 * scans, because the results are useless at this 1612 * point, and we should be able to keep running 1613 * another scheduled scan while suspended. 1614 */ 1615 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1616 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, 1617 true); 1618 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1619 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, 1620 true); 1621 1622 /* fall through, something is wrong if no scan was 1623 * running but we ran out of scans. 1624 */ 1625 default: 1626 WARN_ON(1); 1627 break; 1628 } 1629 1630 return -EIO; 1631 } 1632 1633 #define SCAN_TIMEOUT 20000 1634 1635 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1636 { 1637 struct delayed_work *delayed_work = to_delayed_work(work); 1638 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1639 scan_timeout_dwork); 1640 1641 IWL_ERR(mvm, "regular scan timed out\n"); 1642 1643 iwl_force_nmi(mvm->trans); 1644 } 1645 1646 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm, 1647 struct iwl_mvm_scan_params *params, 1648 struct ieee80211_vif *vif) 1649 { 1650 if (iwl_mvm_is_cdb_supported(mvm)) { 1651 params->type = 1652 iwl_mvm_get_scan_type_band(mvm, vif, 1653 NL80211_BAND_2GHZ); 1654 params->hb_type = 1655 iwl_mvm_get_scan_type_band(mvm, vif, 1656 NL80211_BAND_5GHZ); 1657 } else { 1658 params->type = iwl_mvm_get_scan_type(mvm, vif); 1659 } 1660 } 1661 1662 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1663 struct cfg80211_scan_request *req, 1664 struct ieee80211_scan_ies *ies) 1665 { 1666 struct iwl_host_cmd hcmd = { 1667 .len = { iwl_mvm_scan_size(mvm), }, 1668 .data = { mvm->scan_cmd, }, 1669 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1670 }; 1671 struct iwl_mvm_scan_params params = {}; 1672 int ret; 1673 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1674 1675 lockdep_assert_held(&mvm->mutex); 1676 1677 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1678 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1679 return -EBUSY; 1680 } 1681 1682 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1683 if (ret) 1684 return ret; 1685 1686 /* we should have failed registration if scan_cmd was NULL */ 1687 if (WARN_ON(!mvm->scan_cmd)) 1688 return -ENOMEM; 1689 1690 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1691 return -ENOBUFS; 1692 1693 params.n_ssids = req->n_ssids; 1694 params.flags = req->flags; 1695 params.n_channels = req->n_channels; 1696 params.delay = 0; 1697 params.ssids = req->ssids; 1698 params.channels = req->channels; 1699 params.mac_addr = req->mac_addr; 1700 params.mac_addr_mask = req->mac_addr_mask; 1701 params.no_cck = req->no_cck; 1702 params.pass_all = true; 1703 params.n_match_sets = 0; 1704 params.match_sets = NULL; 1705 1706 params.scan_plans = &scan_plan; 1707 params.n_scan_plans = 1; 1708 1709 iwl_mvm_fill_scan_type(mvm, ¶ms, vif); 1710 1711 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms); 1712 if (ret < 0) 1713 return ret; 1714 1715 params.measurement_dwell = ret; 1716 1717 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1718 1719 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1720 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1721 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1722 IWL_MVM_SCAN_REGULAR); 1723 } else { 1724 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1725 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1726 } 1727 1728 if (ret) 1729 return ret; 1730 1731 iwl_mvm_pause_tcm(mvm, false); 1732 1733 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1734 if (ret) { 1735 /* If the scan failed, it usually means that the FW was unable 1736 * to allocate the time events. Warn on it, but maybe we 1737 * should try to send the command again with different params. 1738 */ 1739 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1740 iwl_mvm_resume_tcm(mvm); 1741 return ret; 1742 } 1743 1744 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1745 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1746 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); 1747 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1748 1749 schedule_delayed_work(&mvm->scan_timeout_dwork, 1750 msecs_to_jiffies(SCAN_TIMEOUT)); 1751 1752 return 0; 1753 } 1754 1755 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1756 struct ieee80211_vif *vif, 1757 struct cfg80211_sched_scan_request *req, 1758 struct ieee80211_scan_ies *ies, 1759 int type) 1760 { 1761 struct iwl_host_cmd hcmd = { 1762 .len = { iwl_mvm_scan_size(mvm), }, 1763 .data = { mvm->scan_cmd, }, 1764 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1765 }; 1766 struct iwl_mvm_scan_params params = {}; 1767 int ret; 1768 1769 lockdep_assert_held(&mvm->mutex); 1770 1771 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1772 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1773 return -EBUSY; 1774 } 1775 1776 ret = iwl_mvm_check_running_scans(mvm, type); 1777 if (ret) 1778 return ret; 1779 1780 /* we should have failed registration if scan_cmd was NULL */ 1781 if (WARN_ON(!mvm->scan_cmd)) 1782 return -ENOMEM; 1783 1784 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1785 return -ENOBUFS; 1786 1787 params.n_ssids = req->n_ssids; 1788 params.flags = req->flags; 1789 params.n_channels = req->n_channels; 1790 params.ssids = req->ssids; 1791 params.channels = req->channels; 1792 params.mac_addr = req->mac_addr; 1793 params.mac_addr_mask = req->mac_addr_mask; 1794 params.no_cck = false; 1795 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1796 params.n_match_sets = req->n_match_sets; 1797 params.match_sets = req->match_sets; 1798 if (!req->n_scan_plans) 1799 return -EINVAL; 1800 1801 params.n_scan_plans = req->n_scan_plans; 1802 params.scan_plans = req->scan_plans; 1803 1804 iwl_mvm_fill_scan_type(mvm, ¶ms, vif); 1805 1806 /* In theory, LMAC scans can handle a 32-bit delay, but since 1807 * waiting for over 18 hours to start the scan is a bit silly 1808 * and to keep it aligned with UMAC scans (which only support 1809 * 16-bit delays), trim it down to 16-bits. 1810 */ 1811 if (req->delay > U16_MAX) { 1812 IWL_DEBUG_SCAN(mvm, 1813 "delay value is > 16-bits, set to max possible\n"); 1814 params.delay = U16_MAX; 1815 } else { 1816 params.delay = req->delay; 1817 } 1818 1819 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1820 if (ret) 1821 return ret; 1822 1823 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1824 1825 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1826 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1827 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1828 } else { 1829 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1830 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1831 } 1832 1833 if (ret) 1834 return ret; 1835 1836 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1837 if (!ret) { 1838 IWL_DEBUG_SCAN(mvm, 1839 "Sched scan request was sent successfully\n"); 1840 mvm->scan_status |= type; 1841 } else { 1842 /* If the scan failed, it usually means that the FW was unable 1843 * to allocate the time events. Warn on it, but maybe we 1844 * should try to send the command again with different params. 1845 */ 1846 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1847 } 1848 1849 return ret; 1850 } 1851 1852 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1853 struct iwl_rx_cmd_buffer *rxb) 1854 { 1855 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1856 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1857 u32 uid = __le32_to_cpu(notif->uid); 1858 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1859 1860 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1861 return; 1862 1863 /* if the scan is already stopping, we don't need to notify mac80211 */ 1864 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1865 struct cfg80211_scan_info info = { 1866 .aborted = aborted, 1867 .scan_start_tsf = mvm->scan_start, 1868 }; 1869 1870 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); 1871 ieee80211_scan_completed(mvm->hw, &info); 1872 mvm->scan_vif = NULL; 1873 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1874 cancel_delayed_work(&mvm->scan_timeout_dwork); 1875 iwl_mvm_resume_tcm(mvm); 1876 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1877 ieee80211_sched_scan_stopped(mvm->hw); 1878 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1879 } 1880 1881 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1882 IWL_DEBUG_SCAN(mvm, 1883 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1884 uid, mvm->scan_uid_status[uid], 1885 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1886 "completed" : "aborted", 1887 iwl_mvm_ebs_status_str(notif->ebs_status)); 1888 IWL_DEBUG_SCAN(mvm, 1889 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1890 notif->last_schedule, notif->last_iter, 1891 __le32_to_cpu(notif->time_from_last_iter)); 1892 1893 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1894 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1895 mvm->last_ebs_successful = false; 1896 1897 mvm->scan_uid_status[uid] = 0; 1898 } 1899 1900 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1901 struct iwl_rx_cmd_buffer *rxb) 1902 { 1903 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1904 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1905 1906 mvm->scan_start = le64_to_cpu(notif->start_tsf); 1907 1908 IWL_DEBUG_SCAN(mvm, 1909 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n", 1910 notif->status, notif->scanned_channels); 1911 1912 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1913 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1914 ieee80211_sched_scan_results(mvm->hw); 1915 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1916 } 1917 1918 IWL_DEBUG_SCAN(mvm, 1919 "UMAC Scan iteration complete: scan started at %llu (TSF)\n", 1920 mvm->scan_start); 1921 } 1922 1923 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1924 { 1925 struct iwl_umac_scan_abort cmd = {}; 1926 int uid, ret; 1927 1928 lockdep_assert_held(&mvm->mutex); 1929 1930 /* We should always get a valid index here, because we already 1931 * checked that this type of scan was running in the generic 1932 * code. 1933 */ 1934 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1935 if (WARN_ON_ONCE(uid < 0)) 1936 return uid; 1937 1938 cmd.uid = cpu_to_le32(uid); 1939 1940 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1941 1942 ret = iwl_mvm_send_cmd_pdu(mvm, 1943 iwl_cmd_id(SCAN_ABORT_UMAC, 1944 IWL_ALWAYS_LONG_GROUP, 0), 1945 0, sizeof(cmd), &cmd); 1946 if (!ret) 1947 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1948 1949 return ret; 1950 } 1951 1952 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1953 { 1954 struct iwl_notification_wait wait_scan_done; 1955 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1956 SCAN_OFFLOAD_COMPLETE, }; 1957 int ret; 1958 1959 lockdep_assert_held(&mvm->mutex); 1960 1961 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1962 scan_done_notif, 1963 ARRAY_SIZE(scan_done_notif), 1964 NULL, NULL); 1965 1966 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1967 1968 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1969 ret = iwl_mvm_umac_scan_abort(mvm, type); 1970 else 1971 ret = iwl_mvm_lmac_scan_abort(mvm); 1972 1973 if (ret) { 1974 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1975 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1976 return ret; 1977 } 1978 1979 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1980 1981 return ret; 1982 } 1983 1984 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1985 { 1986 int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1; 1987 1988 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 1989 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8; 1990 else if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 1991 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7; 1992 else if (iwl_mvm_cdb_scan_api(mvm)) 1993 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6; 1994 1995 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1996 return base_size + 1997 sizeof(struct iwl_scan_channel_cfg_umac) * 1998 mvm->fw->ucode_capa.n_scan_channels + 1999 sizeof(struct iwl_scan_req_umac_tail); 2000 2001 return sizeof(struct iwl_scan_req_lmac) + 2002 sizeof(struct iwl_scan_channel_cfg_lmac) * 2003 mvm->fw->ucode_capa.n_scan_channels + 2004 sizeof(struct iwl_scan_probe_req); 2005 } 2006 2007 /* 2008 * This function is used in nic restart flow, to inform mac80211 about scans 2009 * that was aborted by restart flow or by an assert. 2010 */ 2011 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 2012 { 2013 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 2014 int uid, i; 2015 2016 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 2017 if (uid >= 0) { 2018 struct cfg80211_scan_info info = { 2019 .aborted = true, 2020 }; 2021 2022 ieee80211_scan_completed(mvm->hw, &info); 2023 mvm->scan_uid_status[uid] = 0; 2024 } 2025 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 2026 if (uid >= 0 && !mvm->fw_restart) { 2027 ieee80211_sched_scan_stopped(mvm->hw); 2028 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 2029 mvm->scan_uid_status[uid] = 0; 2030 } 2031 2032 /* We shouldn't have any UIDs still set. Loop over all the 2033 * UIDs to make sure there's nothing left there and warn if 2034 * any is found. 2035 */ 2036 for (i = 0; i < mvm->max_scans; i++) { 2037 if (WARN_ONCE(mvm->scan_uid_status[i], 2038 "UMAC scan UID %d status was not cleaned\n", 2039 i)) 2040 mvm->scan_uid_status[i] = 0; 2041 } 2042 } else { 2043 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 2044 struct cfg80211_scan_info info = { 2045 .aborted = true, 2046 }; 2047 2048 ieee80211_scan_completed(mvm->hw, &info); 2049 } 2050 2051 /* Sched scan will be restarted by mac80211 in 2052 * restart_hw, so do not report if FW is about to be 2053 * restarted. 2054 */ 2055 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 2056 !mvm->fw_restart) { 2057 ieee80211_sched_scan_stopped(mvm->hw); 2058 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 2059 } 2060 } 2061 } 2062 2063 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 2064 { 2065 int ret; 2066 2067 if (!(mvm->scan_status & type)) 2068 return 0; 2069 2070 if (iwl_mvm_is_radio_killed(mvm)) { 2071 ret = 0; 2072 goto out; 2073 } 2074 2075 ret = iwl_mvm_scan_stop_wait(mvm, type); 2076 if (!ret) 2077 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 2078 out: 2079 /* Clear the scan status so the next scan requests will 2080 * succeed and mark the scan as stopping, so that the Rx 2081 * handler doesn't do anything, as the scan was stopped from 2082 * above. 2083 */ 2084 mvm->scan_status &= ~type; 2085 2086 if (type == IWL_MVM_SCAN_REGULAR) { 2087 /* Since the rx handler won't do anything now, we have 2088 * to release the scan reference here. 2089 */ 2090 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 2091 cancel_delayed_work(&mvm->scan_timeout_dwork); 2092 if (notify) { 2093 struct cfg80211_scan_info info = { 2094 .aborted = true, 2095 }; 2096 2097 ieee80211_scan_completed(mvm->hw, &info); 2098 } 2099 } else if (notify) { 2100 ieee80211_sched_scan_stopped(mvm->hw); 2101 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 2102 } 2103 2104 return ret; 2105 } 2106