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 }; 114 115 struct iwl_mvm_scan_params { 116 /* For CDB this is low band scan type, for non-CDB - type. */ 117 enum iwl_mvm_scan_type type; 118 enum iwl_mvm_scan_type hb_type; 119 u32 n_channels; 120 u16 delay; 121 int n_ssids; 122 struct cfg80211_ssid *ssids; 123 struct ieee80211_channel **channels; 124 u32 flags; 125 u8 *mac_addr; 126 u8 *mac_addr_mask; 127 bool no_cck; 128 bool pass_all; 129 int n_match_sets; 130 struct iwl_scan_probe_req preq; 131 struct cfg80211_match_set *match_sets; 132 int n_scan_plans; 133 struct cfg80211_sched_scan_plan *scan_plans; 134 u32 measurement_dwell; 135 }; 136 137 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm) 138 { 139 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 140 141 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 142 return (void *)&cmd->v8.data; 143 144 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 145 return (void *)&cmd->v7.data; 146 147 if (iwl_mvm_cdb_scan_api(mvm)) 148 return (void *)&cmd->v6.data; 149 150 return (void *)&cmd->v1.data; 151 } 152 153 static inline struct iwl_scan_umac_chan_param * 154 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm) 155 { 156 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 157 158 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 159 return &cmd->v8.channel; 160 161 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 162 return &cmd->v7.channel; 163 164 if (iwl_mvm_cdb_scan_api(mvm)) 165 return &cmd->v6.channel; 166 167 return &cmd->v1.channel; 168 } 169 170 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 171 { 172 if (mvm->scan_rx_ant != ANT_NONE) 173 return mvm->scan_rx_ant; 174 return iwl_mvm_get_valid_rx_ant(mvm); 175 } 176 177 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 178 { 179 u16 rx_chain; 180 u8 rx_ant; 181 182 rx_ant = iwl_mvm_scan_rx_ant(mvm); 183 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 184 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 185 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 186 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 187 return cpu_to_le16(rx_chain); 188 } 189 190 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band) 191 { 192 if (band == NL80211_BAND_2GHZ) 193 return cpu_to_le32(PHY_BAND_24); 194 else 195 return cpu_to_le32(PHY_BAND_5); 196 } 197 198 static inline __le32 199 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, 200 bool no_cck) 201 { 202 u32 tx_ant; 203 204 mvm->scan_last_antenna_idx = 205 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 206 mvm->scan_last_antenna_idx); 207 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 208 209 if (band == NL80211_BAND_2GHZ && !no_cck) 210 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 211 tx_ant); 212 else 213 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 214 } 215 216 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 217 struct ieee80211_vif *vif) 218 { 219 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 220 int *global_cnt = data; 221 222 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 223 mvmvif->phy_ctxt->id < NUM_PHY_CTX) 224 *global_cnt += 1; 225 } 226 227 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 228 { 229 return mvm->tcm.result.global_load; 230 } 231 232 static enum iwl_mvm_traffic_load 233 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band) 234 { 235 return mvm->tcm.result.band_load[band]; 236 } 237 238 static enum 239 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device, 240 enum iwl_mvm_traffic_load load, 241 bool low_latency) 242 { 243 int global_cnt = 0; 244 245 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 246 IEEE80211_IFACE_ITER_NORMAL, 247 iwl_mvm_scan_condition_iterator, 248 &global_cnt); 249 if (!global_cnt) 250 return IWL_SCAN_TYPE_UNASSOC; 251 252 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device && 253 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) 254 return IWL_SCAN_TYPE_FRAGMENTED; 255 256 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 257 return IWL_SCAN_TYPE_MILD; 258 259 return IWL_SCAN_TYPE_WILD; 260 } 261 262 static enum 263 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device) 264 { 265 enum iwl_mvm_traffic_load load; 266 bool low_latency; 267 268 load = iwl_mvm_get_traffic_load(mvm); 269 low_latency = iwl_mvm_low_latency(mvm); 270 271 return _iwl_mvm_get_scan_type(mvm, p2p_device, load, low_latency); 272 } 273 274 static enum 275 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm, 276 bool p2p_device, 277 enum nl80211_band band) 278 { 279 enum iwl_mvm_traffic_load load; 280 bool low_latency; 281 282 load = iwl_mvm_get_traffic_load_band(mvm, band); 283 low_latency = iwl_mvm_low_latency_band(mvm, band); 284 285 return _iwl_mvm_get_scan_type(mvm, p2p_device, load, low_latency); 286 } 287 288 static int 289 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm, 290 struct cfg80211_scan_request *req, 291 struct iwl_mvm_scan_params *params) 292 { 293 u32 duration = scan_timing[params->type].max_out_time; 294 295 if (!req->duration) 296 return 0; 297 298 if (iwl_mvm_is_cdb_supported(mvm)) { 299 u32 hb_time = scan_timing[params->hb_type].max_out_time; 300 301 duration = min_t(u32, duration, hb_time); 302 } 303 304 if (req->duration_mandatory && req->duration > duration) { 305 IWL_DEBUG_SCAN(mvm, 306 "Measurement scan - too long dwell %hu (max out time %u)\n", 307 req->duration, 308 duration); 309 return -EOPNOTSUPP; 310 } 311 312 return min_t(u32, (u32)req->duration, duration); 313 } 314 315 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 316 { 317 /* require rrm scan whenever the fw supports it */ 318 return fw_has_capa(&mvm->fw->ucode_capa, 319 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 320 } 321 322 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 323 { 324 int max_probe_len; 325 326 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 327 328 /* we create the 802.11 header and SSID element */ 329 max_probe_len -= 24 + 2; 330 331 /* DS parameter set element is added on 2.4GHZ band if required */ 332 if (iwl_mvm_rrm_scan_needed(mvm)) 333 max_probe_len -= 3; 334 335 return max_probe_len; 336 } 337 338 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 339 { 340 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 341 342 /* TODO: [BUG] This function should return the maximum allowed size of 343 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 344 * in the same command. So the correct implementation of this function 345 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 346 * command has only 512 bytes and it would leave us with about 240 347 * bytes for scan IEs, which is clearly not enough. So meanwhile 348 * we will report an incorrect value. This may result in a failure to 349 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 350 * functions with -ENOBUFS, if a large enough probe will be provided. 351 */ 352 return max_ie_len; 353 } 354 355 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 356 struct iwl_rx_cmd_buffer *rxb) 357 { 358 struct iwl_rx_packet *pkt = rxb_addr(rxb); 359 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 360 361 IWL_DEBUG_SCAN(mvm, 362 "Scan offload iteration complete: status=0x%x scanned channels=%d\n", 363 notif->status, notif->scanned_channels); 364 365 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 366 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 367 ieee80211_sched_scan_results(mvm->hw); 368 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 369 } 370 } 371 372 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 373 struct iwl_rx_cmd_buffer *rxb) 374 { 375 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 376 ieee80211_sched_scan_results(mvm->hw); 377 } 378 379 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 380 { 381 switch (status) { 382 case IWL_SCAN_EBS_SUCCESS: 383 return "successful"; 384 case IWL_SCAN_EBS_INACTIVE: 385 return "inactive"; 386 case IWL_SCAN_EBS_FAILED: 387 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 388 default: 389 return "failed"; 390 } 391 } 392 393 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 394 struct iwl_rx_cmd_buffer *rxb) 395 { 396 struct iwl_rx_packet *pkt = rxb_addr(rxb); 397 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 398 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 399 400 /* If this happens, the firmware has mistakenly sent an LMAC 401 * notification during UMAC scans -- warn and ignore it. 402 */ 403 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 404 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 405 return; 406 407 /* scan status must be locked for proper checking */ 408 lockdep_assert_held(&mvm->mutex); 409 410 /* We first check if we were stopping a scan, in which case we 411 * just clear the stopping flag. Then we check if it was a 412 * firmware initiated stop, in which case we need to inform 413 * mac80211. 414 * Note that we can have a stopping and a running scan 415 * simultaneously, but we can't have two different types of 416 * scans stopping or running at the same time (since LMAC 417 * doesn't support it). 418 */ 419 420 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 421 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 422 423 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 424 aborted ? "aborted" : "completed", 425 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 426 IWL_DEBUG_SCAN(mvm, 427 "Last line %d, Last iteration %d, Time after last iteration %d\n", 428 scan_notif->last_schedule_line, 429 scan_notif->last_schedule_iteration, 430 __le32_to_cpu(scan_notif->time_after_last_iter)); 431 432 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 433 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 434 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 435 aborted ? "aborted" : "completed", 436 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 437 438 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 439 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 440 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 441 442 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 443 aborted ? "aborted" : "completed", 444 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 445 IWL_DEBUG_SCAN(mvm, 446 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 447 scan_notif->last_schedule_line, 448 scan_notif->last_schedule_iteration, 449 __le32_to_cpu(scan_notif->time_after_last_iter)); 450 451 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 452 ieee80211_sched_scan_stopped(mvm->hw); 453 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 454 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 455 struct cfg80211_scan_info info = { 456 .aborted = aborted, 457 }; 458 459 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 460 aborted ? "aborted" : "completed", 461 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 462 463 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 464 ieee80211_scan_completed(mvm->hw, &info); 465 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 466 cancel_delayed_work(&mvm->scan_timeout_dwork); 467 iwl_mvm_resume_tcm(mvm); 468 } else { 469 IWL_ERR(mvm, 470 "got scan complete notification but no scan is running\n"); 471 } 472 473 mvm->last_ebs_successful = 474 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 475 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 476 } 477 478 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 479 { 480 int i; 481 482 for (i = 0; i < PROBE_OPTION_MAX; i++) { 483 if (!ssid_list[i].len) 484 break; 485 if (ssid_list[i].len == ssid_len && 486 !memcmp(ssid_list->ssid, ssid, ssid_len)) 487 return i; 488 } 489 return -1; 490 } 491 492 /* We insert the SSIDs in an inverted order, because the FW will 493 * invert it back. 494 */ 495 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 496 struct iwl_ssid_ie *ssids, 497 u32 *ssid_bitmap) 498 { 499 int i, j; 500 int index; 501 502 /* 503 * copy SSIDs from match list. 504 * iwl_config_sched_scan_profiles() uses the order of these ssids to 505 * config match list. 506 */ 507 for (i = 0, j = params->n_match_sets - 1; 508 j >= 0 && i < PROBE_OPTION_MAX; 509 i++, j--) { 510 /* skip empty SSID matchsets */ 511 if (!params->match_sets[j].ssid.ssid_len) 512 continue; 513 ssids[i].id = WLAN_EID_SSID; 514 ssids[i].len = params->match_sets[j].ssid.ssid_len; 515 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 516 ssids[i].len); 517 } 518 519 /* add SSIDs from scan SSID list */ 520 *ssid_bitmap = 0; 521 for (j = params->n_ssids - 1; 522 j >= 0 && i < PROBE_OPTION_MAX; 523 i++, j--) { 524 index = iwl_ssid_exist(params->ssids[j].ssid, 525 params->ssids[j].ssid_len, 526 ssids); 527 if (index < 0) { 528 ssids[i].id = WLAN_EID_SSID; 529 ssids[i].len = params->ssids[j].ssid_len; 530 memcpy(ssids[i].ssid, params->ssids[j].ssid, 531 ssids[i].len); 532 *ssid_bitmap |= BIT(i); 533 } else { 534 *ssid_bitmap |= BIT(index); 535 } 536 } 537 } 538 539 static int 540 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 541 struct cfg80211_sched_scan_request *req) 542 { 543 struct iwl_scan_offload_profile *profile; 544 struct iwl_scan_offload_profile_cfg *profile_cfg; 545 struct iwl_scan_offload_blacklist *blacklist; 546 struct iwl_host_cmd cmd = { 547 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 548 .len[1] = sizeof(*profile_cfg), 549 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 550 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 551 }; 552 int blacklist_len; 553 int i; 554 int ret; 555 556 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 557 return -EIO; 558 559 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 560 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 561 else 562 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 563 564 blacklist = kcalloc(blacklist_len, sizeof(*blacklist), GFP_KERNEL); 565 if (!blacklist) 566 return -ENOMEM; 567 568 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 569 if (!profile_cfg) { 570 ret = -ENOMEM; 571 goto free_blacklist; 572 } 573 574 cmd.data[0] = blacklist; 575 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 576 cmd.data[1] = profile_cfg; 577 578 /* No blacklist configuration */ 579 580 profile_cfg->num_profiles = req->n_match_sets; 581 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 582 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 583 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 584 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 585 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 586 587 for (i = 0; i < req->n_match_sets; i++) { 588 profile = &profile_cfg->profiles[i]; 589 profile->ssid_index = i; 590 /* Support any cipher and auth algorithm */ 591 profile->unicast_cipher = 0xff; 592 profile->auth_alg = 0xff; 593 profile->network_type = IWL_NETWORK_TYPE_ANY; 594 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 595 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 596 } 597 598 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 599 600 ret = iwl_mvm_send_cmd(mvm, &cmd); 601 kfree(profile_cfg); 602 free_blacklist: 603 kfree(blacklist); 604 605 return ret; 606 } 607 608 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 609 struct cfg80211_sched_scan_request *req) 610 { 611 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 612 IWL_DEBUG_SCAN(mvm, 613 "Sending scheduled scan with filtering, n_match_sets %d\n", 614 req->n_match_sets); 615 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 616 return false; 617 } 618 619 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 620 621 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 622 return true; 623 } 624 625 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 626 { 627 int ret; 628 struct iwl_host_cmd cmd = { 629 .id = SCAN_OFFLOAD_ABORT_CMD, 630 }; 631 u32 status = CAN_ABORT_STATUS; 632 633 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 634 if (ret) 635 return ret; 636 637 if (status != CAN_ABORT_STATUS) { 638 /* 639 * The scan abort will return 1 for success or 640 * 2 for "failure". A failure condition can be 641 * due to simply not being in an active scan which 642 * can occur if we send the scan abort before the 643 * microcode has notified us that a scan is completed. 644 */ 645 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 646 ret = -ENOENT; 647 } 648 649 return ret; 650 } 651 652 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 653 struct iwl_scan_req_tx_cmd *tx_cmd, 654 bool no_cck) 655 { 656 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 657 TX_CMD_FLG_BT_DIS); 658 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 659 NL80211_BAND_2GHZ, 660 no_cck); 661 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 662 663 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 664 TX_CMD_FLG_BT_DIS); 665 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 666 NL80211_BAND_5GHZ, 667 no_cck); 668 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 669 } 670 671 static void 672 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 673 struct ieee80211_channel **channels, 674 int n_channels, u32 ssid_bitmap, 675 struct iwl_scan_req_lmac *cmd) 676 { 677 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 678 int i; 679 680 for (i = 0; i < n_channels; i++) { 681 channel_cfg[i].channel_num = 682 cpu_to_le16(channels[i]->hw_value); 683 channel_cfg[i].iter_count = cpu_to_le16(1); 684 channel_cfg[i].iter_interval = 0; 685 channel_cfg[i].flags = 686 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 687 ssid_bitmap); 688 } 689 } 690 691 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 692 size_t len, u8 *const pos) 693 { 694 static const u8 before_ds_params[] = { 695 WLAN_EID_SSID, 696 WLAN_EID_SUPP_RATES, 697 WLAN_EID_REQUEST, 698 WLAN_EID_EXT_SUPP_RATES, 699 }; 700 size_t offs; 701 u8 *newpos = pos; 702 703 if (!iwl_mvm_rrm_scan_needed(mvm)) { 704 memcpy(newpos, ies, len); 705 return newpos + len; 706 } 707 708 offs = ieee80211_ie_split(ies, len, 709 before_ds_params, 710 ARRAY_SIZE(before_ds_params), 711 0); 712 713 memcpy(newpos, ies, offs); 714 newpos += offs; 715 716 /* Add a placeholder for DS Parameter Set element */ 717 *newpos++ = WLAN_EID_DS_PARAMS; 718 *newpos++ = 1; 719 *newpos++ = 0; 720 721 memcpy(newpos, ies + offs, len - offs); 722 newpos += len - offs; 723 724 return newpos; 725 } 726 727 #define WFA_TPC_IE_LEN 9 728 729 static void iwl_mvm_add_tpc_report_ie(u8 *pos) 730 { 731 pos[0] = WLAN_EID_VENDOR_SPECIFIC; 732 pos[1] = WFA_TPC_IE_LEN - 2; 733 pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff; 734 pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff; 735 pos[4] = WLAN_OUI_MICROSOFT & 0xff; 736 pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC; 737 pos[6] = 0; 738 /* pos[7] - tx power will be inserted by the FW */ 739 pos[7] = 0; 740 pos[8] = 0; 741 } 742 743 static void 744 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 745 struct ieee80211_scan_ies *ies, 746 struct iwl_mvm_scan_params *params) 747 { 748 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 749 u8 *pos, *newpos; 750 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 751 params->mac_addr : NULL; 752 753 /* 754 * Unfortunately, right now the offload scan doesn't support randomising 755 * within the firmware, so until the firmware API is ready we implement 756 * it in the driver. This means that the scan iterations won't really be 757 * random, only when it's restarted, but at least that helps a bit. 758 */ 759 if (mac_addr) 760 get_random_mask_addr(frame->sa, mac_addr, 761 params->mac_addr_mask); 762 else 763 memcpy(frame->sa, vif->addr, ETH_ALEN); 764 765 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 766 eth_broadcast_addr(frame->da); 767 eth_broadcast_addr(frame->bssid); 768 frame->seq_ctrl = 0; 769 770 pos = frame->u.probe_req.variable; 771 *pos++ = WLAN_EID_SSID; 772 *pos++ = 0; 773 774 params->preq.mac_header.offset = 0; 775 params->preq.mac_header.len = cpu_to_le16(24 + 2); 776 777 /* Insert ds parameter set element on 2.4 GHz band */ 778 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 779 ies->ies[NL80211_BAND_2GHZ], 780 ies->len[NL80211_BAND_2GHZ], 781 pos); 782 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 783 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 784 pos = newpos; 785 786 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 787 ies->len[NL80211_BAND_5GHZ]); 788 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 789 params->preq.band_data[1].len = 790 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 791 pos += ies->len[NL80211_BAND_5GHZ]; 792 793 memcpy(pos, ies->common_ies, ies->common_ie_len); 794 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 795 796 if (iwl_mvm_rrm_scan_needed(mvm) && 797 !fw_has_capa(&mvm->fw->ucode_capa, 798 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) { 799 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len); 800 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len + 801 WFA_TPC_IE_LEN); 802 } else { 803 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 804 } 805 } 806 807 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 808 struct iwl_scan_req_lmac *cmd, 809 struct iwl_mvm_scan_params *params) 810 { 811 cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE; 812 cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE; 813 cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 814 cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED; 815 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 816 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 817 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 818 } 819 820 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 821 struct ieee80211_scan_ies *ies, 822 int n_channels) 823 { 824 return ((n_ssids <= PROBE_OPTION_MAX) && 825 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 826 (ies->common_ie_len + 827 ies->len[NL80211_BAND_2GHZ] + 828 ies->len[NL80211_BAND_5GHZ] <= 829 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 830 } 831 832 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 833 struct ieee80211_vif *vif) 834 { 835 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 836 bool low_latency; 837 838 if (iwl_mvm_is_cdb_supported(mvm)) 839 low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ); 840 else 841 low_latency = iwl_mvm_low_latency(mvm); 842 843 /* We can only use EBS if: 844 * 1. the feature is supported; 845 * 2. the last EBS was successful; 846 * 3. if only single scan, the single scan EBS API is supported; 847 * 4. it's not a p2p find operation. 848 * 5. we are not in low latency mode, 849 * or if fragmented ebs is supported by the FW 850 */ 851 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 852 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS && 853 vif->type != NL80211_IFTYPE_P2P_DEVICE && 854 (!low_latency || iwl_mvm_is_frag_ebs_supported(mvm))); 855 } 856 857 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 858 { 859 return params->n_scan_plans == 1 && 860 params->scan_plans[0].iterations == 1; 861 } 862 863 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 864 struct iwl_mvm_scan_params *params, 865 struct ieee80211_vif *vif) 866 { 867 int flags = 0; 868 869 if (params->n_ssids == 0) 870 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 871 872 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 873 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 874 875 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 876 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 877 878 if (iwl_mvm_rrm_scan_needed(mvm) && 879 fw_has_capa(&mvm->fw->ucode_capa, 880 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 881 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 882 883 if (params->pass_all) 884 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 885 else 886 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 887 888 #ifdef CONFIG_IWLWIFI_DEBUGFS 889 if (mvm->scan_iter_notif_enabled) 890 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 891 #endif 892 893 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 894 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 895 896 if (iwl_mvm_is_regular_scan(params) && 897 vif->type != NL80211_IFTYPE_P2P_DEVICE && 898 params->type != IWL_SCAN_TYPE_FRAGMENTED) 899 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 900 901 return flags; 902 } 903 904 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 905 struct iwl_mvm_scan_params *params) 906 { 907 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 908 struct iwl_scan_probe_req *preq = 909 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 910 mvm->fw->ucode_capa.n_scan_channels); 911 u32 ssid_bitmap = 0; 912 int i; 913 914 lockdep_assert_held(&mvm->mutex); 915 916 memset(cmd, 0, ksize(cmd)); 917 918 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 919 return -EINVAL; 920 921 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 922 923 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 924 cmd->iter_num = cpu_to_le32(1); 925 cmd->n_channels = (u8)params->n_channels; 926 927 cmd->delay = cpu_to_le32(params->delay); 928 929 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 930 vif)); 931 932 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 933 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 934 MAC_FILTER_IN_BEACON); 935 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 936 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 937 938 /* this API uses bits 1-20 instead of 0-19 */ 939 ssid_bitmap <<= 1; 940 941 for (i = 0; i < params->n_scan_plans; i++) { 942 struct cfg80211_sched_scan_plan *scan_plan = 943 ¶ms->scan_plans[i]; 944 945 cmd->schedule[i].delay = 946 cpu_to_le16(scan_plan->interval); 947 cmd->schedule[i].iterations = scan_plan->iterations; 948 cmd->schedule[i].full_scan_mul = 1; 949 } 950 951 /* 952 * If the number of iterations of the last scan plan is set to 953 * zero, it should run infinitely. However, this is not always the case. 954 * For example, when regular scan is requested the driver sets one scan 955 * plan with one iteration. 956 */ 957 if (!cmd->schedule[i - 1].iterations) 958 cmd->schedule[i - 1].iterations = 0xff; 959 960 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 961 cmd->channel_opt[0].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[0].non_ebs_ratio = 966 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 967 cmd->channel_opt[1].flags = 968 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 969 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 970 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 971 cmd->channel_opt[1].non_ebs_ratio = 972 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 973 } 974 975 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 976 params->n_channels, ssid_bitmap, cmd); 977 978 *preq = params->preq; 979 980 return 0; 981 } 982 983 static int rate_to_scan_rate_flag(unsigned int rate) 984 { 985 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 986 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 987 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 988 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 989 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 990 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 991 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 992 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 993 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 994 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 995 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 996 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 997 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 998 }; 999 1000 return rate_to_scan_rate[rate]; 1001 } 1002 1003 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 1004 { 1005 struct ieee80211_supported_band *band; 1006 unsigned int rates = 0; 1007 int i; 1008 1009 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1010 for (i = 0; i < band->n_bitrates; i++) 1011 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 1012 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1013 for (i = 0; i < band->n_bitrates; i++) 1014 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 1015 1016 /* Set both basic rates and supported rates */ 1017 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 1018 1019 return cpu_to_le32(rates); 1020 } 1021 1022 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm, 1023 struct iwl_scan_dwell *dwell) 1024 { 1025 dwell->active = IWL_SCAN_DWELL_ACTIVE; 1026 dwell->passive = IWL_SCAN_DWELL_PASSIVE; 1027 dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED; 1028 dwell->extended = IWL_SCAN_DWELL_EXTENDED; 1029 } 1030 1031 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels) 1032 { 1033 struct ieee80211_supported_band *band; 1034 int i, j = 0; 1035 1036 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1037 for (i = 0; i < band->n_channels; i++, j++) 1038 channels[j] = band->channels[i].hw_value; 1039 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1040 for (i = 0; i < band->n_channels; i++, j++) 1041 channels[j] = band->channels[i].hw_value; 1042 } 1043 1044 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config, 1045 u32 flags, u8 channel_flags) 1046 { 1047 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1048 struct iwl_scan_config_v1 *cfg = config; 1049 1050 cfg->flags = cpu_to_le32(flags); 1051 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1052 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1053 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1054 cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time); 1055 cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 1056 1057 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1058 1059 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1060 1061 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1062 cfg->channel_flags = channel_flags; 1063 1064 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1065 } 1066 1067 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config, 1068 u32 flags, u8 channel_flags) 1069 { 1070 struct iwl_scan_config *cfg = config; 1071 1072 cfg->flags = cpu_to_le32(flags); 1073 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1074 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1075 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1076 1077 if (iwl_mvm_is_cdb_supported(mvm)) { 1078 enum iwl_mvm_scan_type lb_type, hb_type; 1079 1080 lb_type = iwl_mvm_get_scan_type_band(mvm, false, 1081 NL80211_BAND_2GHZ); 1082 hb_type = iwl_mvm_get_scan_type_band(mvm, false, 1083 NL80211_BAND_5GHZ); 1084 1085 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = 1086 cpu_to_le32(scan_timing[lb_type].max_out_time); 1087 cfg->suspend_time[SCAN_LB_LMAC_IDX] = 1088 cpu_to_le32(scan_timing[lb_type].suspend_time); 1089 1090 cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] = 1091 cpu_to_le32(scan_timing[hb_type].max_out_time); 1092 cfg->suspend_time[SCAN_HB_LMAC_IDX] = 1093 cpu_to_le32(scan_timing[hb_type].suspend_time); 1094 } else { 1095 enum iwl_mvm_scan_type type = 1096 iwl_mvm_get_scan_type(mvm, false); 1097 1098 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] = 1099 cpu_to_le32(scan_timing[type].max_out_time); 1100 cfg->suspend_time[SCAN_LB_LMAC_IDX] = 1101 cpu_to_le32(scan_timing[type].suspend_time); 1102 } 1103 1104 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1105 1106 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1107 1108 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1109 cfg->channel_flags = channel_flags; 1110 1111 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1112 } 1113 1114 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 1115 { 1116 void *cfg; 1117 int ret, cmd_size; 1118 struct iwl_host_cmd cmd = { 1119 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 1120 }; 1121 enum iwl_mvm_scan_type type; 1122 enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET; 1123 int num_channels = 1124 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 1125 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 1126 u32 flags; 1127 u8 channel_flags; 1128 1129 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 1130 return -ENOBUFS; 1131 1132 if (iwl_mvm_is_cdb_supported(mvm)) { 1133 type = iwl_mvm_get_scan_type_band(mvm, false, 1134 NL80211_BAND_2GHZ); 1135 hb_type = iwl_mvm_get_scan_type_band(mvm, false, 1136 NL80211_BAND_5GHZ); 1137 if (type == mvm->scan_type && hb_type == mvm->hb_scan_type) 1138 return 0; 1139 } else { 1140 type = iwl_mvm_get_scan_type(mvm, false); 1141 if (type == mvm->scan_type) 1142 return 0; 1143 } 1144 1145 if (iwl_mvm_cdb_scan_api(mvm)) 1146 cmd_size = sizeof(struct iwl_scan_config); 1147 else 1148 cmd_size = sizeof(struct iwl_scan_config_v1); 1149 cmd_size += mvm->fw->ucode_capa.n_scan_channels; 1150 1151 cfg = kzalloc(cmd_size, GFP_KERNEL); 1152 if (!cfg) 1153 return -ENOMEM; 1154 1155 flags = SCAN_CONFIG_FLAG_ACTIVATE | 1156 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 1157 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 1158 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 1159 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 1160 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 1161 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 1162 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 1163 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS | 1164 SCAN_CONFIG_N_CHANNELS(num_channels) | 1165 (type == IWL_SCAN_TYPE_FRAGMENTED ? 1166 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 1167 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 1168 1169 channel_flags = IWL_CHANNEL_FLAG_EBS | 1170 IWL_CHANNEL_FLAG_ACCURATE_EBS | 1171 IWL_CHANNEL_FLAG_EBS_ADD | 1172 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 1173 1174 /* 1175 * Check for fragmented scan on LMAC2 - high band. 1176 * LMAC1 - low band is checked above. 1177 */ 1178 if (iwl_mvm_cdb_scan_api(mvm)) { 1179 if (iwl_mvm_is_cdb_supported(mvm)) 1180 flags |= (hb_type == IWL_SCAN_TYPE_FRAGMENTED) ? 1181 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED : 1182 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED; 1183 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags); 1184 } else { 1185 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags); 1186 } 1187 1188 cmd.data[0] = cfg; 1189 cmd.len[0] = cmd_size; 1190 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1191 1192 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1193 1194 ret = iwl_mvm_send_cmd(mvm, &cmd); 1195 if (!ret) { 1196 mvm->scan_type = type; 1197 mvm->hb_scan_type = hb_type; 1198 } 1199 1200 kfree(cfg); 1201 return ret; 1202 } 1203 1204 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1205 { 1206 int i; 1207 1208 for (i = 0; i < mvm->max_scans; i++) 1209 if (mvm->scan_uid_status[i] == status) 1210 return i; 1211 1212 return -ENOENT; 1213 } 1214 1215 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1216 struct iwl_scan_req_umac *cmd, 1217 struct iwl_mvm_scan_params *params) 1218 { 1219 struct iwl_mvm_scan_timing_params *timing, *hb_timing; 1220 u8 active_dwell, passive_dwell; 1221 1222 timing = &scan_timing[params->type]; 1223 active_dwell = params->measurement_dwell ? 1224 params->measurement_dwell : IWL_SCAN_DWELL_ACTIVE; 1225 passive_dwell = params->measurement_dwell ? 1226 params->measurement_dwell : IWL_SCAN_DWELL_PASSIVE; 1227 1228 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1229 cmd->v7.adwell_default_n_aps_social = 1230 IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL; 1231 cmd->v7.adwell_default_n_aps = 1232 IWL_SCAN_ADWELL_DEFAULT_N_APS; 1233 1234 /* if custom max budget was configured with debugfs */ 1235 if (IWL_MVM_ADWELL_MAX_BUDGET) 1236 cmd->v7.adwell_max_budget = 1237 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET); 1238 else if (params->ssids && params->ssids[0].ssid_len) 1239 cmd->v7.adwell_max_budget = 1240 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN); 1241 else 1242 cmd->v7.adwell_max_budget = 1243 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN); 1244 1245 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1246 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] = 1247 cpu_to_le32(timing->max_out_time); 1248 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] = 1249 cpu_to_le32(timing->suspend_time); 1250 1251 if (iwl_mvm_is_cdb_supported(mvm)) { 1252 hb_timing = &scan_timing[params->hb_type]; 1253 1254 cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] = 1255 cpu_to_le32(hb_timing->max_out_time); 1256 cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] = 1257 cpu_to_le32(hb_timing->suspend_time); 1258 } 1259 1260 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1261 cmd->v7.active_dwell = active_dwell; 1262 cmd->v7.passive_dwell = passive_dwell; 1263 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1264 } else { 1265 cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell; 1266 cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell; 1267 if (iwl_mvm_is_cdb_supported(mvm)) { 1268 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] = 1269 active_dwell; 1270 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] = 1271 passive_dwell; 1272 } 1273 } 1274 } else { 1275 cmd->v1.extended_dwell = params->measurement_dwell ? 1276 params->measurement_dwell : IWL_SCAN_DWELL_EXTENDED; 1277 cmd->v1.active_dwell = active_dwell; 1278 cmd->v1.passive_dwell = passive_dwell; 1279 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1280 1281 if (iwl_mvm_is_cdb_supported(mvm)) { 1282 hb_timing = &scan_timing[params->hb_type]; 1283 1284 cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] = 1285 cpu_to_le32(hb_timing->max_out_time); 1286 cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] = 1287 cpu_to_le32(hb_timing->suspend_time); 1288 } 1289 1290 if (iwl_mvm_cdb_scan_api(mvm)) { 1291 cmd->v6.scan_priority = 1292 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1293 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] = 1294 cpu_to_le32(timing->max_out_time); 1295 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] = 1296 cpu_to_le32(timing->suspend_time); 1297 } else { 1298 cmd->v1.scan_priority = 1299 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1300 cmd->v1.max_out_time = 1301 cpu_to_le32(timing->max_out_time); 1302 cmd->v1.suspend_time = 1303 cpu_to_le32(timing->suspend_time); 1304 } 1305 } 1306 1307 if (iwl_mvm_is_regular_scan(params)) 1308 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1309 else 1310 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2); 1311 } 1312 1313 static void 1314 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1315 struct ieee80211_channel **channels, 1316 int n_channels, u32 ssid_bitmap, 1317 struct iwl_scan_channel_cfg_umac *channel_cfg) 1318 { 1319 int i; 1320 1321 for (i = 0; i < n_channels; i++) { 1322 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1323 channel_cfg[i].channel_num = channels[i]->hw_value; 1324 channel_cfg[i].iter_count = 1; 1325 channel_cfg[i].iter_interval = 0; 1326 } 1327 } 1328 1329 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1330 struct iwl_mvm_scan_params *params, 1331 struct ieee80211_vif *vif) 1332 { 1333 u16 flags = 0; 1334 1335 if (params->n_ssids == 0) 1336 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1337 1338 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1339 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1340 1341 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 1342 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1343 1344 if (iwl_mvm_is_cdb_supported(mvm) && 1345 params->hb_type == IWL_SCAN_TYPE_FRAGMENTED) 1346 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED; 1347 1348 if (iwl_mvm_rrm_scan_needed(mvm) && 1349 fw_has_capa(&mvm->fw->ucode_capa, 1350 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 1351 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1352 1353 if (params->pass_all) 1354 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1355 else 1356 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1357 1358 if (!iwl_mvm_is_regular_scan(params)) 1359 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1360 1361 if (params->measurement_dwell) 1362 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1363 1364 #ifdef CONFIG_IWLWIFI_DEBUGFS 1365 if (mvm->scan_iter_notif_enabled) 1366 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1367 #endif 1368 1369 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1370 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1371 1372 if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE && 1373 vif->type != NL80211_IFTYPE_P2P_DEVICE) 1374 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL; 1375 1376 /* 1377 * Extended dwell is relevant only for low band to start with, as it is 1378 * being used for social channles only (1, 6, 11), so we can check 1379 * only scan type on low band also for CDB. 1380 */ 1381 if (iwl_mvm_is_regular_scan(params) && 1382 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1383 params->type != IWL_SCAN_TYPE_FRAGMENTED && 1384 !iwl_mvm_is_adaptive_dwell_supported(mvm) && 1385 !iwl_mvm_is_oce_supported(mvm)) 1386 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1387 1388 if (iwl_mvm_is_oce_supported(mvm)) { 1389 if ((params->flags & 1390 NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE)) 1391 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE; 1392 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and 1393 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares 1394 * the same bit, we need to make sure that we use this bit here 1395 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be 1396 * used. */ 1397 if ((params->flags & 1398 NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) && 1399 !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm))) 1400 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP; 1401 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)) 1402 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME; 1403 } 1404 1405 return flags; 1406 } 1407 1408 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1409 struct iwl_mvm_scan_params *params, 1410 int type) 1411 { 1412 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1413 struct iwl_scan_umac_chan_param *chan_param; 1414 void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm); 1415 struct iwl_scan_req_umac_tail *sec_part = cmd_data + 1416 sizeof(struct iwl_scan_channel_cfg_umac) * 1417 mvm->fw->ucode_capa.n_scan_channels; 1418 int uid, i; 1419 u32 ssid_bitmap = 0; 1420 u8 channel_flags = 0; 1421 u16 gen_flags; 1422 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); 1423 1424 chan_param = iwl_mvm_get_scan_req_umac_channel(mvm); 1425 1426 lockdep_assert_held(&mvm->mutex); 1427 1428 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1429 return -EINVAL; 1430 1431 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1432 if (uid < 0) 1433 return uid; 1434 1435 memset(cmd, 0, ksize(cmd)); 1436 1437 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1438 1439 mvm->scan_uid_status[uid] = type; 1440 1441 cmd->uid = cpu_to_le32(uid); 1442 gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif); 1443 cmd->general_flags = cpu_to_le16(gen_flags); 1444 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1445 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED) 1446 cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] = 1447 IWL_SCAN_NUM_OF_FRAGS; 1448 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED) 1449 cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] = 1450 IWL_SCAN_NUM_OF_FRAGS; 1451 } 1452 1453 cmd->scan_start_mac_id = scan_vif->id; 1454 1455 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1456 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1457 1458 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 1459 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1460 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1461 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1462 1463 /* set fragmented ebs for fragmented scan on HB channels */ 1464 if (iwl_mvm_is_frag_ebs_supported(mvm)) { 1465 if (gen_flags & 1466 IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED || 1467 (!iwl_mvm_is_cdb_supported(mvm) && 1468 gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)) 1469 channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG; 1470 } 1471 } 1472 1473 chan_param->flags = channel_flags; 1474 chan_param->count = params->n_channels; 1475 1476 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1477 1478 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1479 params->n_channels, ssid_bitmap, 1480 cmd_data); 1481 1482 for (i = 0; i < params->n_scan_plans; i++) { 1483 struct cfg80211_sched_scan_plan *scan_plan = 1484 ¶ms->scan_plans[i]; 1485 1486 sec_part->schedule[i].iter_count = scan_plan->iterations; 1487 sec_part->schedule[i].interval = 1488 cpu_to_le16(scan_plan->interval); 1489 } 1490 1491 /* 1492 * If the number of iterations of the last scan plan is set to 1493 * zero, it should run infinitely. However, this is not always the case. 1494 * For example, when regular scan is requested the driver sets one scan 1495 * plan with one iteration. 1496 */ 1497 if (!sec_part->schedule[i - 1].iter_count) 1498 sec_part->schedule[i - 1].iter_count = 0xff; 1499 1500 sec_part->delay = cpu_to_le16(params->delay); 1501 sec_part->preq = params->preq; 1502 1503 return 0; 1504 } 1505 1506 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1507 { 1508 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1509 } 1510 1511 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1512 { 1513 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa, 1514 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG); 1515 1516 /* This looks a bit arbitrary, but the idea is that if we run 1517 * out of possible simultaneous scans and the userspace is 1518 * trying to run a scan type that is already running, we 1519 * return -EBUSY. But if the userspace wants to start a 1520 * different type of scan, we stop the opposite type to make 1521 * space for the new request. The reason is backwards 1522 * compatibility with old wpa_supplicant that wouldn't stop a 1523 * scheduled scan before starting a normal scan. 1524 */ 1525 1526 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1527 return 0; 1528 1529 /* Use a switch, even though this is a bitmask, so that more 1530 * than one bits set will fall in default and we will warn. 1531 */ 1532 switch (type) { 1533 case IWL_MVM_SCAN_REGULAR: 1534 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1535 return -EBUSY; 1536 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1537 case IWL_MVM_SCAN_SCHED: 1538 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1539 return -EBUSY; 1540 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1541 case IWL_MVM_SCAN_NETDETECT: 1542 /* For non-unified images, there's no need to stop 1543 * anything for net-detect since the firmware is 1544 * restarted anyway. This way, any sched scans that 1545 * were running will be restarted when we resume. 1546 */ 1547 if (!unified_image) 1548 return 0; 1549 1550 /* If this is a unified image and we ran out of scans, 1551 * we need to stop something. Prefer stopping regular 1552 * scans, because the results are useless at this 1553 * point, and we should be able to keep running 1554 * another scheduled scan while suspended. 1555 */ 1556 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1557 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, 1558 true); 1559 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1560 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, 1561 true); 1562 1563 /* fall through, something is wrong if no scan was 1564 * running but we ran out of scans. 1565 */ 1566 default: 1567 WARN_ON(1); 1568 break; 1569 } 1570 1571 return -EIO; 1572 } 1573 1574 #define SCAN_TIMEOUT 20000 1575 1576 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1577 { 1578 struct delayed_work *delayed_work = to_delayed_work(work); 1579 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1580 scan_timeout_dwork); 1581 1582 IWL_ERR(mvm, "regular scan timed out\n"); 1583 1584 iwl_force_nmi(mvm->trans); 1585 } 1586 1587 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm, 1588 struct iwl_mvm_scan_params *params, 1589 bool p2p) 1590 { 1591 if (iwl_mvm_is_cdb_supported(mvm)) { 1592 params->type = 1593 iwl_mvm_get_scan_type_band(mvm, p2p, 1594 NL80211_BAND_2GHZ); 1595 params->hb_type = 1596 iwl_mvm_get_scan_type_band(mvm, p2p, 1597 NL80211_BAND_5GHZ); 1598 } else { 1599 params->type = iwl_mvm_get_scan_type(mvm, p2p); 1600 } 1601 } 1602 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1603 struct cfg80211_scan_request *req, 1604 struct ieee80211_scan_ies *ies) 1605 { 1606 struct iwl_host_cmd hcmd = { 1607 .len = { iwl_mvm_scan_size(mvm), }, 1608 .data = { mvm->scan_cmd, }, 1609 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1610 }; 1611 struct iwl_mvm_scan_params params = {}; 1612 int ret; 1613 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1614 1615 lockdep_assert_held(&mvm->mutex); 1616 1617 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1618 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1619 return -EBUSY; 1620 } 1621 1622 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1623 if (ret) 1624 return ret; 1625 1626 /* we should have failed registration if scan_cmd was NULL */ 1627 if (WARN_ON(!mvm->scan_cmd)) 1628 return -ENOMEM; 1629 1630 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1631 return -ENOBUFS; 1632 1633 params.n_ssids = req->n_ssids; 1634 params.flags = req->flags; 1635 params.n_channels = req->n_channels; 1636 params.delay = 0; 1637 params.ssids = req->ssids; 1638 params.channels = req->channels; 1639 params.mac_addr = req->mac_addr; 1640 params.mac_addr_mask = req->mac_addr_mask; 1641 params.no_cck = req->no_cck; 1642 params.pass_all = true; 1643 params.n_match_sets = 0; 1644 params.match_sets = NULL; 1645 1646 params.scan_plans = &scan_plan; 1647 params.n_scan_plans = 1; 1648 1649 iwl_mvm_fill_scan_type(mvm, ¶ms, 1650 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1651 1652 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms); 1653 if (ret < 0) 1654 return ret; 1655 1656 params.measurement_dwell = ret; 1657 1658 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1659 1660 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1661 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1662 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1663 IWL_MVM_SCAN_REGULAR); 1664 } else { 1665 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1666 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1667 } 1668 1669 if (ret) 1670 return ret; 1671 1672 iwl_mvm_pause_tcm(mvm, false); 1673 1674 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1675 if (ret) { 1676 /* If the scan failed, it usually means that the FW was unable 1677 * to allocate the time events. Warn on it, but maybe we 1678 * should try to send the command again with different params. 1679 */ 1680 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1681 iwl_mvm_resume_tcm(mvm); 1682 return ret; 1683 } 1684 1685 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1686 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1687 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); 1688 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1689 1690 schedule_delayed_work(&mvm->scan_timeout_dwork, 1691 msecs_to_jiffies(SCAN_TIMEOUT)); 1692 1693 return 0; 1694 } 1695 1696 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1697 struct ieee80211_vif *vif, 1698 struct cfg80211_sched_scan_request *req, 1699 struct ieee80211_scan_ies *ies, 1700 int type) 1701 { 1702 struct iwl_host_cmd hcmd = { 1703 .len = { iwl_mvm_scan_size(mvm), }, 1704 .data = { mvm->scan_cmd, }, 1705 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1706 }; 1707 struct iwl_mvm_scan_params params = {}; 1708 int ret; 1709 1710 lockdep_assert_held(&mvm->mutex); 1711 1712 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1713 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1714 return -EBUSY; 1715 } 1716 1717 ret = iwl_mvm_check_running_scans(mvm, type); 1718 if (ret) 1719 return ret; 1720 1721 /* we should have failed registration if scan_cmd was NULL */ 1722 if (WARN_ON(!mvm->scan_cmd)) 1723 return -ENOMEM; 1724 1725 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1726 return -ENOBUFS; 1727 1728 params.n_ssids = req->n_ssids; 1729 params.flags = req->flags; 1730 params.n_channels = req->n_channels; 1731 params.ssids = req->ssids; 1732 params.channels = req->channels; 1733 params.mac_addr = req->mac_addr; 1734 params.mac_addr_mask = req->mac_addr_mask; 1735 params.no_cck = false; 1736 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1737 params.n_match_sets = req->n_match_sets; 1738 params.match_sets = req->match_sets; 1739 if (!req->n_scan_plans) 1740 return -EINVAL; 1741 1742 params.n_scan_plans = req->n_scan_plans; 1743 params.scan_plans = req->scan_plans; 1744 1745 iwl_mvm_fill_scan_type(mvm, ¶ms, 1746 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1747 1748 /* In theory, LMAC scans can handle a 32-bit delay, but since 1749 * waiting for over 18 hours to start the scan is a bit silly 1750 * and to keep it aligned with UMAC scans (which only support 1751 * 16-bit delays), trim it down to 16-bits. 1752 */ 1753 if (req->delay > U16_MAX) { 1754 IWL_DEBUG_SCAN(mvm, 1755 "delay value is > 16-bits, set to max possible\n"); 1756 params.delay = U16_MAX; 1757 } else { 1758 params.delay = req->delay; 1759 } 1760 1761 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1762 if (ret) 1763 return ret; 1764 1765 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1766 1767 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1768 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1769 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1770 } else { 1771 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1772 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1773 } 1774 1775 if (ret) 1776 return ret; 1777 1778 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1779 if (!ret) { 1780 IWL_DEBUG_SCAN(mvm, 1781 "Sched scan request was sent successfully\n"); 1782 mvm->scan_status |= type; 1783 } else { 1784 /* If the scan failed, it usually means that the FW was unable 1785 * to allocate the time events. Warn on it, but maybe we 1786 * should try to send the command again with different params. 1787 */ 1788 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1789 } 1790 1791 return ret; 1792 } 1793 1794 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1795 struct iwl_rx_cmd_buffer *rxb) 1796 { 1797 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1798 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1799 u32 uid = __le32_to_cpu(notif->uid); 1800 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1801 1802 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1803 return; 1804 1805 /* if the scan is already stopping, we don't need to notify mac80211 */ 1806 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1807 struct cfg80211_scan_info info = { 1808 .aborted = aborted, 1809 .scan_start_tsf = mvm->scan_start, 1810 }; 1811 1812 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); 1813 ieee80211_scan_completed(mvm->hw, &info); 1814 mvm->scan_vif = NULL; 1815 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1816 cancel_delayed_work(&mvm->scan_timeout_dwork); 1817 iwl_mvm_resume_tcm(mvm); 1818 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1819 ieee80211_sched_scan_stopped(mvm->hw); 1820 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1821 } 1822 1823 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1824 IWL_DEBUG_SCAN(mvm, 1825 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1826 uid, mvm->scan_uid_status[uid], 1827 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1828 "completed" : "aborted", 1829 iwl_mvm_ebs_status_str(notif->ebs_status)); 1830 IWL_DEBUG_SCAN(mvm, 1831 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1832 notif->last_schedule, notif->last_iter, 1833 __le32_to_cpu(notif->time_from_last_iter)); 1834 1835 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1836 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1837 mvm->last_ebs_successful = false; 1838 1839 mvm->scan_uid_status[uid] = 0; 1840 } 1841 1842 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1843 struct iwl_rx_cmd_buffer *rxb) 1844 { 1845 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1846 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1847 1848 mvm->scan_start = le64_to_cpu(notif->start_tsf); 1849 1850 IWL_DEBUG_SCAN(mvm, 1851 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n", 1852 notif->status, notif->scanned_channels); 1853 1854 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1855 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1856 ieee80211_sched_scan_results(mvm->hw); 1857 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1858 } 1859 1860 IWL_DEBUG_SCAN(mvm, 1861 "UMAC Scan iteration complete: scan started at %llu (TSF)\n", 1862 mvm->scan_start); 1863 } 1864 1865 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1866 { 1867 struct iwl_umac_scan_abort cmd = {}; 1868 int uid, ret; 1869 1870 lockdep_assert_held(&mvm->mutex); 1871 1872 /* We should always get a valid index here, because we already 1873 * checked that this type of scan was running in the generic 1874 * code. 1875 */ 1876 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1877 if (WARN_ON_ONCE(uid < 0)) 1878 return uid; 1879 1880 cmd.uid = cpu_to_le32(uid); 1881 1882 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1883 1884 ret = iwl_mvm_send_cmd_pdu(mvm, 1885 iwl_cmd_id(SCAN_ABORT_UMAC, 1886 IWL_ALWAYS_LONG_GROUP, 0), 1887 0, sizeof(cmd), &cmd); 1888 if (!ret) 1889 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1890 1891 return ret; 1892 } 1893 1894 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1895 { 1896 struct iwl_notification_wait wait_scan_done; 1897 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1898 SCAN_OFFLOAD_COMPLETE, }; 1899 int ret; 1900 1901 lockdep_assert_held(&mvm->mutex); 1902 1903 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1904 scan_done_notif, 1905 ARRAY_SIZE(scan_done_notif), 1906 NULL, NULL); 1907 1908 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1909 1910 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1911 ret = iwl_mvm_umac_scan_abort(mvm, type); 1912 else 1913 ret = iwl_mvm_lmac_scan_abort(mvm); 1914 1915 if (ret) { 1916 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1917 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1918 return ret; 1919 } 1920 1921 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1922 1923 return ret; 1924 } 1925 1926 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1927 { 1928 int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1; 1929 1930 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 1931 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8; 1932 else if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 1933 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7; 1934 else if (iwl_mvm_cdb_scan_api(mvm)) 1935 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6; 1936 1937 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1938 return base_size + 1939 sizeof(struct iwl_scan_channel_cfg_umac) * 1940 mvm->fw->ucode_capa.n_scan_channels + 1941 sizeof(struct iwl_scan_req_umac_tail); 1942 1943 return sizeof(struct iwl_scan_req_lmac) + 1944 sizeof(struct iwl_scan_channel_cfg_lmac) * 1945 mvm->fw->ucode_capa.n_scan_channels + 1946 sizeof(struct iwl_scan_probe_req); 1947 } 1948 1949 /* 1950 * This function is used in nic restart flow, to inform mac80211 about scans 1951 * that was aborted by restart flow or by an assert. 1952 */ 1953 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1954 { 1955 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1956 int uid, i; 1957 1958 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1959 if (uid >= 0) { 1960 struct cfg80211_scan_info info = { 1961 .aborted = true, 1962 }; 1963 1964 ieee80211_scan_completed(mvm->hw, &info); 1965 mvm->scan_uid_status[uid] = 0; 1966 } 1967 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1968 if (uid >= 0 && !mvm->fw_restart) { 1969 ieee80211_sched_scan_stopped(mvm->hw); 1970 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1971 mvm->scan_uid_status[uid] = 0; 1972 } 1973 1974 /* We shouldn't have any UIDs still set. Loop over all the 1975 * UIDs to make sure there's nothing left there and warn if 1976 * any is found. 1977 */ 1978 for (i = 0; i < mvm->max_scans; i++) { 1979 if (WARN_ONCE(mvm->scan_uid_status[i], 1980 "UMAC scan UID %d status was not cleaned\n", 1981 i)) 1982 mvm->scan_uid_status[i] = 0; 1983 } 1984 } else { 1985 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 1986 struct cfg80211_scan_info info = { 1987 .aborted = true, 1988 }; 1989 1990 ieee80211_scan_completed(mvm->hw, &info); 1991 } 1992 1993 /* Sched scan will be restarted by mac80211 in 1994 * restart_hw, so do not report if FW is about to be 1995 * restarted. 1996 */ 1997 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1998 !mvm->fw_restart) { 1999 ieee80211_sched_scan_stopped(mvm->hw); 2000 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 2001 } 2002 } 2003 } 2004 2005 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 2006 { 2007 int ret; 2008 2009 if (!(mvm->scan_status & type)) 2010 return 0; 2011 2012 if (iwl_mvm_is_radio_killed(mvm)) { 2013 ret = 0; 2014 goto out; 2015 } 2016 2017 ret = iwl_mvm_scan_stop_wait(mvm, type); 2018 if (!ret) 2019 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 2020 out: 2021 /* Clear the scan status so the next scan requests will 2022 * succeed and mark the scan as stopping, so that the Rx 2023 * handler doesn't do anything, as the scan was stopped from 2024 * above. 2025 */ 2026 mvm->scan_status &= ~type; 2027 2028 if (type == IWL_MVM_SCAN_REGULAR) { 2029 /* Since the rx handler won't do anything now, we have 2030 * to release the scan reference here. 2031 */ 2032 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 2033 cancel_delayed_work(&mvm->scan_timeout_dwork); 2034 if (notify) { 2035 struct cfg80211_scan_info info = { 2036 .aborted = true, 2037 }; 2038 2039 ieee80211_scan_completed(mvm->hw, &info); 2040 } 2041 } else if (notify) { 2042 ieee80211_sched_scan_stopped(mvm->hw); 2043 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 2044 } 2045 2046 return ret; 2047 } 2048