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 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 - 2017 Intel Deutschland GmbH 38 * Copyright(c) 2018 Intel Corporation 39 * All rights reserved. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 45 * * Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * * Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in 49 * the documentation and/or other materials provided with the 50 * distribution. 51 * * Neither the name Intel Corporation nor the names of its 52 * contributors may be used to endorse or promote products derived 53 * from this software without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 56 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 57 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 58 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 59 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 60 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 61 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 65 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 66 * 67 *****************************************************************************/ 68 69 #include <linux/etherdevice.h> 70 #include <net/mac80211.h> 71 72 #include "mvm.h" 73 #include "fw/api/scan.h" 74 #include "iwl-io.h" 75 76 #define IWL_DENSE_EBS_SCAN_RATIO 5 77 #define IWL_SPARSE_EBS_SCAN_RATIO 1 78 79 enum iwl_mvm_traffic_load { 80 IWL_MVM_TRAFFIC_LOW, 81 IWL_MVM_TRAFFIC_MEDIUM, 82 IWL_MVM_TRAFFIC_HIGH, 83 }; 84 85 #define IWL_SCAN_DWELL_ACTIVE 10 86 #define IWL_SCAN_DWELL_PASSIVE 110 87 #define IWL_SCAN_DWELL_FRAGMENTED 44 88 #define IWL_SCAN_DWELL_EXTENDED 90 89 #define IWL_SCAN_NUM_OF_FRAGS 3 90 91 92 /* adaptive dwell max budget time [TU] for full scan */ 93 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300 94 /* adaptive dwell max budget time [TU] for directed scan */ 95 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100 96 /* adaptive dwell default APs number */ 97 #define IWL_SCAN_ADWELL_DEFAULT_N_APS 2 98 /* adaptive dwell default APs number in social channels (1, 6, 11) */ 99 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10 100 101 struct iwl_mvm_scan_timing_params { 102 u32 suspend_time; 103 u32 max_out_time; 104 }; 105 106 static struct iwl_mvm_scan_timing_params scan_timing[] = { 107 [IWL_SCAN_TYPE_UNASSOC] = { 108 .suspend_time = 0, 109 .max_out_time = 0, 110 }, 111 [IWL_SCAN_TYPE_WILD] = { 112 .suspend_time = 30, 113 .max_out_time = 120, 114 }, 115 [IWL_SCAN_TYPE_MILD] = { 116 .suspend_time = 120, 117 .max_out_time = 120, 118 }, 119 [IWL_SCAN_TYPE_FRAGMENTED] = { 120 .suspend_time = 95, 121 .max_out_time = 44, 122 }, 123 }; 124 125 struct iwl_mvm_scan_params { 126 enum iwl_mvm_scan_type type; 127 u32 n_channels; 128 u16 delay; 129 int n_ssids; 130 struct cfg80211_ssid *ssids; 131 struct ieee80211_channel **channels; 132 u32 flags; 133 u8 *mac_addr; 134 u8 *mac_addr_mask; 135 bool no_cck; 136 bool pass_all; 137 int n_match_sets; 138 struct iwl_scan_probe_req preq; 139 struct cfg80211_match_set *match_sets; 140 int n_scan_plans; 141 struct cfg80211_sched_scan_plan *scan_plans; 142 u32 measurement_dwell; 143 }; 144 145 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm) 146 { 147 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 148 149 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 150 return (void *)&cmd->v8.data; 151 152 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 153 return (void *)&cmd->v7.data; 154 155 if (iwl_mvm_has_new_tx_api(mvm)) 156 return (void *)&cmd->v6.data; 157 158 return (void *)&cmd->v1.data; 159 } 160 161 static inline struct iwl_scan_umac_chan_param * 162 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm) 163 { 164 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 165 166 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 167 return &cmd->v8.channel; 168 169 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 170 return &cmd->v7.channel; 171 172 if (iwl_mvm_has_new_tx_api(mvm)) 173 return &cmd->v6.channel; 174 175 return &cmd->v1.channel; 176 } 177 178 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 179 { 180 if (mvm->scan_rx_ant != ANT_NONE) 181 return mvm->scan_rx_ant; 182 return iwl_mvm_get_valid_rx_ant(mvm); 183 } 184 185 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 186 { 187 u16 rx_chain; 188 u8 rx_ant; 189 190 rx_ant = iwl_mvm_scan_rx_ant(mvm); 191 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 192 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 193 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 194 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 195 return cpu_to_le16(rx_chain); 196 } 197 198 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band) 199 { 200 if (band == NL80211_BAND_2GHZ) 201 return cpu_to_le32(PHY_BAND_24); 202 else 203 return cpu_to_le32(PHY_BAND_5); 204 } 205 206 static inline __le32 207 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, 208 bool no_cck) 209 { 210 u32 tx_ant; 211 212 mvm->scan_last_antenna_idx = 213 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 214 mvm->scan_last_antenna_idx); 215 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 216 217 if (band == NL80211_BAND_2GHZ && !no_cck) 218 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 219 tx_ant); 220 else 221 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 222 } 223 224 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 225 struct ieee80211_vif *vif) 226 { 227 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 228 int *global_cnt = data; 229 230 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 231 mvmvif->phy_ctxt->id < NUM_PHY_CTX) 232 *global_cnt += 1; 233 } 234 235 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 236 { 237 return IWL_MVM_TRAFFIC_LOW; 238 } 239 240 static enum 241 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device) 242 { 243 int global_cnt = 0; 244 enum iwl_mvm_traffic_load load; 245 bool low_latency; 246 247 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 248 IEEE80211_IFACE_ITER_NORMAL, 249 iwl_mvm_scan_condition_iterator, 250 &global_cnt); 251 if (!global_cnt) 252 return IWL_SCAN_TYPE_UNASSOC; 253 254 load = iwl_mvm_get_traffic_load(mvm); 255 low_latency = iwl_mvm_low_latency(mvm); 256 257 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device && 258 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) 259 return IWL_SCAN_TYPE_FRAGMENTED; 260 261 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 262 return IWL_SCAN_TYPE_MILD; 263 264 return IWL_SCAN_TYPE_WILD; 265 } 266 267 static int 268 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm, 269 struct cfg80211_scan_request *req, 270 struct iwl_mvm_scan_params *params) 271 { 272 if (!req->duration) 273 return 0; 274 275 if (req->duration_mandatory && 276 req->duration > scan_timing[params->type].max_out_time) { 277 IWL_DEBUG_SCAN(mvm, 278 "Measurement scan - too long dwell %hu (max out time %u)\n", 279 req->duration, 280 scan_timing[params->type].max_out_time); 281 return -EOPNOTSUPP; 282 } 283 284 return min_t(u32, (u32)req->duration, 285 scan_timing[params->type].max_out_time); 286 } 287 288 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 289 { 290 /* require rrm scan whenever the fw supports it */ 291 return fw_has_capa(&mvm->fw->ucode_capa, 292 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 293 } 294 295 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 296 { 297 int max_probe_len; 298 299 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 300 301 /* we create the 802.11 header and SSID element */ 302 max_probe_len -= 24 + 2; 303 304 /* DS parameter set element is added on 2.4GHZ band if required */ 305 if (iwl_mvm_rrm_scan_needed(mvm)) 306 max_probe_len -= 3; 307 308 return max_probe_len; 309 } 310 311 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 312 { 313 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 314 315 /* TODO: [BUG] This function should return the maximum allowed size of 316 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 317 * in the same command. So the correct implementation of this function 318 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 319 * command has only 512 bytes and it would leave us with about 240 320 * bytes for scan IEs, which is clearly not enough. So meanwhile 321 * we will report an incorrect value. This may result in a failure to 322 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 323 * functions with -ENOBUFS, if a large enough probe will be provided. 324 */ 325 return max_ie_len; 326 } 327 328 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 329 struct iwl_rx_cmd_buffer *rxb) 330 { 331 struct iwl_rx_packet *pkt = rxb_addr(rxb); 332 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 333 334 IWL_DEBUG_SCAN(mvm, 335 "Scan offload iteration complete: status=0x%x scanned channels=%d\n", 336 notif->status, notif->scanned_channels); 337 338 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 339 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 340 ieee80211_sched_scan_results(mvm->hw); 341 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 342 } 343 } 344 345 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 346 struct iwl_rx_cmd_buffer *rxb) 347 { 348 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 349 ieee80211_sched_scan_results(mvm->hw); 350 } 351 352 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 353 { 354 switch (status) { 355 case IWL_SCAN_EBS_SUCCESS: 356 return "successful"; 357 case IWL_SCAN_EBS_INACTIVE: 358 return "inactive"; 359 case IWL_SCAN_EBS_FAILED: 360 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 361 default: 362 return "failed"; 363 } 364 } 365 366 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 367 struct iwl_rx_cmd_buffer *rxb) 368 { 369 struct iwl_rx_packet *pkt = rxb_addr(rxb); 370 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 371 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 372 373 /* If this happens, the firmware has mistakenly sent an LMAC 374 * notification during UMAC scans -- warn and ignore it. 375 */ 376 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 377 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 378 return; 379 380 /* scan status must be locked for proper checking */ 381 lockdep_assert_held(&mvm->mutex); 382 383 /* We first check if we were stopping a scan, in which case we 384 * just clear the stopping flag. Then we check if it was a 385 * firmware initiated stop, in which case we need to inform 386 * mac80211. 387 * Note that we can have a stopping and a running scan 388 * simultaneously, but we can't have two different types of 389 * scans stopping or running at the same time (since LMAC 390 * doesn't support it). 391 */ 392 393 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 394 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 395 396 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 397 aborted ? "aborted" : "completed", 398 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 399 IWL_DEBUG_SCAN(mvm, 400 "Last line %d, Last iteration %d, Time after last iteration %d\n", 401 scan_notif->last_schedule_line, 402 scan_notif->last_schedule_iteration, 403 __le32_to_cpu(scan_notif->time_after_last_iter)); 404 405 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 406 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 407 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 408 aborted ? "aborted" : "completed", 409 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 410 411 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 412 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 413 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 414 415 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 416 aborted ? "aborted" : "completed", 417 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 418 IWL_DEBUG_SCAN(mvm, 419 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 420 scan_notif->last_schedule_line, 421 scan_notif->last_schedule_iteration, 422 __le32_to_cpu(scan_notif->time_after_last_iter)); 423 424 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 425 ieee80211_sched_scan_stopped(mvm->hw); 426 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 427 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 428 struct cfg80211_scan_info info = { 429 .aborted = aborted, 430 }; 431 432 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 433 aborted ? "aborted" : "completed", 434 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 435 436 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 437 ieee80211_scan_completed(mvm->hw, &info); 438 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 439 cancel_delayed_work(&mvm->scan_timeout_dwork); 440 } else { 441 IWL_ERR(mvm, 442 "got scan complete notification but no scan is running\n"); 443 } 444 445 mvm->last_ebs_successful = 446 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 447 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 448 } 449 450 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 451 { 452 int i; 453 454 for (i = 0; i < PROBE_OPTION_MAX; i++) { 455 if (!ssid_list[i].len) 456 break; 457 if (ssid_list[i].len == ssid_len && 458 !memcmp(ssid_list->ssid, ssid, ssid_len)) 459 return i; 460 } 461 return -1; 462 } 463 464 /* We insert the SSIDs in an inverted order, because the FW will 465 * invert it back. 466 */ 467 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 468 struct iwl_ssid_ie *ssids, 469 u32 *ssid_bitmap) 470 { 471 int i, j; 472 int index; 473 474 /* 475 * copy SSIDs from match list. 476 * iwl_config_sched_scan_profiles() uses the order of these ssids to 477 * config match list. 478 */ 479 for (i = 0, j = params->n_match_sets - 1; 480 j >= 0 && i < PROBE_OPTION_MAX; 481 i++, j--) { 482 /* skip empty SSID matchsets */ 483 if (!params->match_sets[j].ssid.ssid_len) 484 continue; 485 ssids[i].id = WLAN_EID_SSID; 486 ssids[i].len = params->match_sets[j].ssid.ssid_len; 487 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 488 ssids[i].len); 489 } 490 491 /* add SSIDs from scan SSID list */ 492 *ssid_bitmap = 0; 493 for (j = params->n_ssids - 1; 494 j >= 0 && i < PROBE_OPTION_MAX; 495 i++, j--) { 496 index = iwl_ssid_exist(params->ssids[j].ssid, 497 params->ssids[j].ssid_len, 498 ssids); 499 if (index < 0) { 500 ssids[i].id = WLAN_EID_SSID; 501 ssids[i].len = params->ssids[j].ssid_len; 502 memcpy(ssids[i].ssid, params->ssids[j].ssid, 503 ssids[i].len); 504 *ssid_bitmap |= BIT(i); 505 } else { 506 *ssid_bitmap |= BIT(index); 507 } 508 } 509 } 510 511 static int 512 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 513 struct cfg80211_sched_scan_request *req) 514 { 515 struct iwl_scan_offload_profile *profile; 516 struct iwl_scan_offload_profile_cfg *profile_cfg; 517 struct iwl_scan_offload_blacklist *blacklist; 518 struct iwl_host_cmd cmd = { 519 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 520 .len[1] = sizeof(*profile_cfg), 521 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 522 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 523 }; 524 int blacklist_len; 525 int i; 526 int ret; 527 528 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 529 return -EIO; 530 531 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 532 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 533 else 534 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 535 536 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); 537 if (!blacklist) 538 return -ENOMEM; 539 540 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 541 if (!profile_cfg) { 542 ret = -ENOMEM; 543 goto free_blacklist; 544 } 545 546 cmd.data[0] = blacklist; 547 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 548 cmd.data[1] = profile_cfg; 549 550 /* No blacklist configuration */ 551 552 profile_cfg->num_profiles = req->n_match_sets; 553 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 554 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 555 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 556 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 557 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 558 559 for (i = 0; i < req->n_match_sets; i++) { 560 profile = &profile_cfg->profiles[i]; 561 profile->ssid_index = i; 562 /* Support any cipher and auth algorithm */ 563 profile->unicast_cipher = 0xff; 564 profile->auth_alg = 0xff; 565 profile->network_type = IWL_NETWORK_TYPE_ANY; 566 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 567 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 568 } 569 570 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 571 572 ret = iwl_mvm_send_cmd(mvm, &cmd); 573 kfree(profile_cfg); 574 free_blacklist: 575 kfree(blacklist); 576 577 return ret; 578 } 579 580 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 581 struct cfg80211_sched_scan_request *req) 582 { 583 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 584 IWL_DEBUG_SCAN(mvm, 585 "Sending scheduled scan with filtering, n_match_sets %d\n", 586 req->n_match_sets); 587 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 588 return false; 589 } 590 591 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 592 593 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 594 return true; 595 } 596 597 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 598 { 599 int ret; 600 struct iwl_host_cmd cmd = { 601 .id = SCAN_OFFLOAD_ABORT_CMD, 602 }; 603 u32 status = CAN_ABORT_STATUS; 604 605 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 606 if (ret) 607 return ret; 608 609 if (status != CAN_ABORT_STATUS) { 610 /* 611 * The scan abort will return 1 for success or 612 * 2 for "failure". A failure condition can be 613 * due to simply not being in an active scan which 614 * can occur if we send the scan abort before the 615 * microcode has notified us that a scan is completed. 616 */ 617 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 618 ret = -ENOENT; 619 } 620 621 return ret; 622 } 623 624 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 625 struct iwl_scan_req_tx_cmd *tx_cmd, 626 bool no_cck) 627 { 628 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 629 TX_CMD_FLG_BT_DIS); 630 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 631 NL80211_BAND_2GHZ, 632 no_cck); 633 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 634 635 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 636 TX_CMD_FLG_BT_DIS); 637 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 638 NL80211_BAND_5GHZ, 639 no_cck); 640 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 641 } 642 643 static void 644 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 645 struct ieee80211_channel **channels, 646 int n_channels, u32 ssid_bitmap, 647 struct iwl_scan_req_lmac *cmd) 648 { 649 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 650 int i; 651 652 for (i = 0; i < n_channels; i++) { 653 channel_cfg[i].channel_num = 654 cpu_to_le16(channels[i]->hw_value); 655 channel_cfg[i].iter_count = cpu_to_le16(1); 656 channel_cfg[i].iter_interval = 0; 657 channel_cfg[i].flags = 658 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 659 ssid_bitmap); 660 } 661 } 662 663 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 664 size_t len, u8 *const pos) 665 { 666 static const u8 before_ds_params[] = { 667 WLAN_EID_SSID, 668 WLAN_EID_SUPP_RATES, 669 WLAN_EID_REQUEST, 670 WLAN_EID_EXT_SUPP_RATES, 671 }; 672 size_t offs; 673 u8 *newpos = pos; 674 675 if (!iwl_mvm_rrm_scan_needed(mvm)) { 676 memcpy(newpos, ies, len); 677 return newpos + len; 678 } 679 680 offs = ieee80211_ie_split(ies, len, 681 before_ds_params, 682 ARRAY_SIZE(before_ds_params), 683 0); 684 685 memcpy(newpos, ies, offs); 686 newpos += offs; 687 688 /* Add a placeholder for DS Parameter Set element */ 689 *newpos++ = WLAN_EID_DS_PARAMS; 690 *newpos++ = 1; 691 *newpos++ = 0; 692 693 memcpy(newpos, ies + offs, len - offs); 694 newpos += len - offs; 695 696 return newpos; 697 } 698 699 #define WFA_TPC_IE_LEN 9 700 701 static void iwl_mvm_add_tpc_report_ie(u8 *pos) 702 { 703 pos[0] = WLAN_EID_VENDOR_SPECIFIC; 704 pos[1] = WFA_TPC_IE_LEN - 2; 705 pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff; 706 pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff; 707 pos[4] = WLAN_OUI_MICROSOFT & 0xff; 708 pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC; 709 pos[6] = 0; 710 /* pos[7] - tx power will be inserted by the FW */ 711 pos[7] = 0; 712 pos[8] = 0; 713 } 714 715 static void 716 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 717 struct ieee80211_scan_ies *ies, 718 struct iwl_mvm_scan_params *params) 719 { 720 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 721 u8 *pos, *newpos; 722 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 723 params->mac_addr : NULL; 724 725 /* 726 * Unfortunately, right now the offload scan doesn't support randomising 727 * within the firmware, so until the firmware API is ready we implement 728 * it in the driver. This means that the scan iterations won't really be 729 * random, only when it's restarted, but at least that helps a bit. 730 */ 731 if (mac_addr) 732 get_random_mask_addr(frame->sa, mac_addr, 733 params->mac_addr_mask); 734 else 735 memcpy(frame->sa, vif->addr, ETH_ALEN); 736 737 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 738 eth_broadcast_addr(frame->da); 739 eth_broadcast_addr(frame->bssid); 740 frame->seq_ctrl = 0; 741 742 pos = frame->u.probe_req.variable; 743 *pos++ = WLAN_EID_SSID; 744 *pos++ = 0; 745 746 params->preq.mac_header.offset = 0; 747 params->preq.mac_header.len = cpu_to_le16(24 + 2); 748 749 /* Insert ds parameter set element on 2.4 GHz band */ 750 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 751 ies->ies[NL80211_BAND_2GHZ], 752 ies->len[NL80211_BAND_2GHZ], 753 pos); 754 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 755 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 756 pos = newpos; 757 758 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 759 ies->len[NL80211_BAND_5GHZ]); 760 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 761 params->preq.band_data[1].len = 762 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 763 pos += ies->len[NL80211_BAND_5GHZ]; 764 765 memcpy(pos, ies->common_ies, ies->common_ie_len); 766 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 767 768 if (iwl_mvm_rrm_scan_needed(mvm) && 769 !fw_has_capa(&mvm->fw->ucode_capa, 770 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) { 771 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len); 772 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len + 773 WFA_TPC_IE_LEN); 774 } else { 775 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 776 } 777 } 778 779 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 780 struct iwl_scan_req_lmac *cmd, 781 struct iwl_mvm_scan_params *params) 782 { 783 cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE; 784 cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE; 785 cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 786 cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED; 787 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 788 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 789 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 790 } 791 792 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 793 struct ieee80211_scan_ies *ies, 794 int n_channels) 795 { 796 return ((n_ssids <= PROBE_OPTION_MAX) && 797 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 798 (ies->common_ie_len + 799 ies->len[NL80211_BAND_2GHZ] + 800 ies->len[NL80211_BAND_5GHZ] <= 801 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 802 } 803 804 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 805 struct ieee80211_vif *vif) 806 { 807 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 808 809 /* We can only use EBS if: 810 * 1. the feature is supported; 811 * 2. the last EBS was successful; 812 * 3. if only single scan, the single scan EBS API is supported; 813 * 4. it's not a p2p find operation. 814 */ 815 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 816 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS && 817 vif->type != NL80211_IFTYPE_P2P_DEVICE); 818 } 819 820 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 821 { 822 return params->n_scan_plans == 1 && 823 params->scan_plans[0].iterations == 1; 824 } 825 826 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 827 struct iwl_mvm_scan_params *params, 828 struct ieee80211_vif *vif) 829 { 830 int flags = 0; 831 832 if (params->n_ssids == 0) 833 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 834 835 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 836 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 837 838 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 839 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 840 841 if (iwl_mvm_rrm_scan_needed(mvm) && 842 fw_has_capa(&mvm->fw->ucode_capa, 843 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 844 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 845 846 if (params->pass_all) 847 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 848 else 849 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 850 851 #ifdef CONFIG_IWLWIFI_DEBUGFS 852 if (mvm->scan_iter_notif_enabled) 853 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 854 #endif 855 856 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 857 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 858 859 if (iwl_mvm_is_regular_scan(params) && 860 vif->type != NL80211_IFTYPE_P2P_DEVICE && 861 params->type != IWL_SCAN_TYPE_FRAGMENTED) 862 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 863 864 return flags; 865 } 866 867 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 868 struct iwl_mvm_scan_params *params) 869 { 870 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 871 struct iwl_scan_probe_req *preq = 872 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 873 mvm->fw->ucode_capa.n_scan_channels); 874 u32 ssid_bitmap = 0; 875 int i; 876 877 lockdep_assert_held(&mvm->mutex); 878 879 memset(cmd, 0, ksize(cmd)); 880 881 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 882 return -EINVAL; 883 884 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 885 886 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 887 cmd->iter_num = cpu_to_le32(1); 888 cmd->n_channels = (u8)params->n_channels; 889 890 cmd->delay = cpu_to_le32(params->delay); 891 892 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 893 vif)); 894 895 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 896 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 897 MAC_FILTER_IN_BEACON); 898 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 899 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 900 901 /* this API uses bits 1-20 instead of 0-19 */ 902 ssid_bitmap <<= 1; 903 904 for (i = 0; i < params->n_scan_plans; i++) { 905 struct cfg80211_sched_scan_plan *scan_plan = 906 ¶ms->scan_plans[i]; 907 908 cmd->schedule[i].delay = 909 cpu_to_le16(scan_plan->interval); 910 cmd->schedule[i].iterations = scan_plan->iterations; 911 cmd->schedule[i].full_scan_mul = 1; 912 } 913 914 /* 915 * If the number of iterations of the last scan plan is set to 916 * zero, it should run infinitely. However, this is not always the case. 917 * For example, when regular scan is requested the driver sets one scan 918 * plan with one iteration. 919 */ 920 if (!cmd->schedule[i - 1].iterations) 921 cmd->schedule[i - 1].iterations = 0xff; 922 923 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 924 cmd->channel_opt[0].flags = 925 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 926 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 927 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 928 cmd->channel_opt[0].non_ebs_ratio = 929 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 930 cmd->channel_opt[1].flags = 931 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 932 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 933 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 934 cmd->channel_opt[1].non_ebs_ratio = 935 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 936 } 937 938 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 939 params->n_channels, ssid_bitmap, cmd); 940 941 *preq = params->preq; 942 943 return 0; 944 } 945 946 static int rate_to_scan_rate_flag(unsigned int rate) 947 { 948 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 949 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 950 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 951 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 952 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 953 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 954 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 955 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 956 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 957 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 958 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 959 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 960 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 961 }; 962 963 return rate_to_scan_rate[rate]; 964 } 965 966 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 967 { 968 struct ieee80211_supported_band *band; 969 unsigned int rates = 0; 970 int i; 971 972 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 973 for (i = 0; i < band->n_bitrates; i++) 974 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 975 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 976 for (i = 0; i < band->n_bitrates; i++) 977 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 978 979 /* Set both basic rates and supported rates */ 980 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 981 982 return cpu_to_le32(rates); 983 } 984 985 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm, 986 struct iwl_scan_dwell *dwell) 987 { 988 dwell->active = IWL_SCAN_DWELL_ACTIVE; 989 dwell->passive = IWL_SCAN_DWELL_PASSIVE; 990 dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED; 991 dwell->extended = IWL_SCAN_DWELL_EXTENDED; 992 } 993 994 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels) 995 { 996 struct ieee80211_supported_band *band; 997 int i, j = 0; 998 999 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 1000 for (i = 0; i < band->n_channels; i++, j++) 1001 channels[j] = band->channels[i].hw_value; 1002 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 1003 for (i = 0; i < band->n_channels; i++, j++) 1004 channels[j] = band->channels[i].hw_value; 1005 } 1006 1007 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config, 1008 u32 flags, u8 channel_flags) 1009 { 1010 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1011 struct iwl_scan_config_v1 *cfg = config; 1012 1013 cfg->flags = cpu_to_le32(flags); 1014 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1015 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1016 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1017 cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time); 1018 cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 1019 1020 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1021 1022 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1023 1024 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1025 cfg->channel_flags = channel_flags; 1026 1027 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1028 } 1029 1030 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config, 1031 u32 flags, u8 channel_flags) 1032 { 1033 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1034 struct iwl_scan_config *cfg = config; 1035 1036 cfg->flags = cpu_to_le32(flags); 1037 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1038 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1039 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1040 cfg->out_of_channel_time[0] = 1041 cpu_to_le32(scan_timing[type].max_out_time); 1042 cfg->suspend_time[0] = cpu_to_le32(scan_timing[type].suspend_time); 1043 1044 if (iwl_mvm_is_cdb_supported(mvm)) { 1045 cfg->suspend_time[1] = 1046 cpu_to_le32(scan_timing[type].suspend_time); 1047 cfg->out_of_channel_time[1] = 1048 cpu_to_le32(scan_timing[type].max_out_time); 1049 } 1050 1051 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1052 1053 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1054 1055 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1056 cfg->channel_flags = channel_flags; 1057 1058 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1059 } 1060 1061 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 1062 { 1063 void *cfg; 1064 int ret, cmd_size; 1065 struct iwl_host_cmd cmd = { 1066 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 1067 }; 1068 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1069 int num_channels = 1070 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 1071 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 1072 u32 flags; 1073 u8 channel_flags; 1074 1075 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 1076 return -ENOBUFS; 1077 1078 if (type == mvm->scan_type) 1079 return 0; 1080 1081 if (iwl_mvm_has_new_tx_api(mvm)) 1082 cmd_size = sizeof(struct iwl_scan_config); 1083 else 1084 cmd_size = sizeof(struct iwl_scan_config_v1); 1085 cmd_size += mvm->fw->ucode_capa.n_scan_channels; 1086 1087 cfg = kzalloc(cmd_size, GFP_KERNEL); 1088 if (!cfg) 1089 return -ENOMEM; 1090 1091 flags = SCAN_CONFIG_FLAG_ACTIVATE | 1092 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 1093 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 1094 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 1095 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 1096 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 1097 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 1098 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 1099 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS | 1100 SCAN_CONFIG_N_CHANNELS(num_channels) | 1101 (type == IWL_SCAN_TYPE_FRAGMENTED ? 1102 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 1103 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 1104 1105 channel_flags = IWL_CHANNEL_FLAG_EBS | 1106 IWL_CHANNEL_FLAG_ACCURATE_EBS | 1107 IWL_CHANNEL_FLAG_EBS_ADD | 1108 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 1109 1110 if (iwl_mvm_has_new_tx_api(mvm)) { 1111 flags |= (type == IWL_SCAN_TYPE_FRAGMENTED) ? 1112 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED : 1113 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED; 1114 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags); 1115 } else { 1116 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags); 1117 } 1118 1119 cmd.data[0] = cfg; 1120 cmd.len[0] = cmd_size; 1121 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1122 1123 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1124 1125 ret = iwl_mvm_send_cmd(mvm, &cmd); 1126 if (!ret) 1127 mvm->scan_type = type; 1128 1129 kfree(cfg); 1130 return ret; 1131 } 1132 1133 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1134 { 1135 int i; 1136 1137 for (i = 0; i < mvm->max_scans; i++) 1138 if (mvm->scan_uid_status[i] == status) 1139 return i; 1140 1141 return -ENOENT; 1142 } 1143 1144 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1145 struct iwl_scan_req_umac *cmd, 1146 struct iwl_mvm_scan_params *params) 1147 { 1148 struct iwl_mvm_scan_timing_params *timing, *hb_timing; 1149 u8 active_dwell, passive_dwell; 1150 1151 timing = &scan_timing[params->type]; 1152 active_dwell = params->measurement_dwell ? 1153 params->measurement_dwell : IWL_SCAN_DWELL_ACTIVE; 1154 passive_dwell = params->measurement_dwell ? 1155 params->measurement_dwell : IWL_SCAN_DWELL_PASSIVE; 1156 1157 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1158 cmd->v7.adwell_default_n_aps_social = 1159 IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL; 1160 cmd->v7.adwell_default_n_aps = 1161 IWL_SCAN_ADWELL_DEFAULT_N_APS; 1162 1163 /* if custom max budget was configured with debugfs */ 1164 if (IWL_MVM_ADWELL_MAX_BUDGET) 1165 cmd->v7.adwell_max_budget = 1166 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET); 1167 else if (params->ssids && params->ssids[0].ssid_len) 1168 cmd->v7.adwell_max_budget = 1169 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN); 1170 else 1171 cmd->v7.adwell_max_budget = 1172 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN); 1173 1174 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1175 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] = 1176 cpu_to_le32(timing->max_out_time); 1177 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] = 1178 cpu_to_le32(timing->suspend_time); 1179 1180 if (iwl_mvm_is_cdb_supported(mvm)) { 1181 hb_timing = &scan_timing[params->type]; 1182 1183 cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] = 1184 cpu_to_le32(hb_timing->max_out_time); 1185 cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] = 1186 cpu_to_le32(hb_timing->suspend_time); 1187 } 1188 1189 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1190 cmd->v7.active_dwell = active_dwell; 1191 cmd->v7.passive_dwell = passive_dwell; 1192 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1193 } else { 1194 cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell; 1195 cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell; 1196 if (iwl_mvm_is_cdb_supported(mvm)) { 1197 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] = 1198 active_dwell; 1199 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] = 1200 passive_dwell; 1201 } 1202 } 1203 } else { 1204 cmd->v1.extended_dwell = params->measurement_dwell ? 1205 params->measurement_dwell : IWL_SCAN_DWELL_EXTENDED; 1206 cmd->v1.active_dwell = active_dwell; 1207 cmd->v1.passive_dwell = passive_dwell; 1208 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1209 1210 if (iwl_mvm_is_cdb_supported(mvm)) { 1211 hb_timing = &scan_timing[params->type]; 1212 1213 cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] = 1214 cpu_to_le32(hb_timing->max_out_time); 1215 cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] = 1216 cpu_to_le32(hb_timing->suspend_time); 1217 } 1218 1219 if (iwl_mvm_has_new_tx_api(mvm)) { 1220 cmd->v6.scan_priority = 1221 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1222 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] = 1223 cpu_to_le32(timing->max_out_time); 1224 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] = 1225 cpu_to_le32(timing->suspend_time); 1226 } else { 1227 cmd->v1.scan_priority = 1228 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1229 cmd->v1.max_out_time = 1230 cpu_to_le32(timing->max_out_time); 1231 cmd->v1.suspend_time = 1232 cpu_to_le32(timing->suspend_time); 1233 } 1234 } 1235 } 1236 1237 static void 1238 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1239 struct ieee80211_channel **channels, 1240 int n_channels, u32 ssid_bitmap, 1241 struct iwl_scan_channel_cfg_umac *channel_cfg) 1242 { 1243 int i; 1244 1245 for (i = 0; i < n_channels; i++) { 1246 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1247 channel_cfg[i].channel_num = channels[i]->hw_value; 1248 channel_cfg[i].iter_count = 1; 1249 channel_cfg[i].iter_interval = 0; 1250 } 1251 } 1252 1253 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1254 struct iwl_mvm_scan_params *params, 1255 struct ieee80211_vif *vif) 1256 { 1257 u16 flags = 0; 1258 1259 if (params->n_ssids == 0) 1260 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1261 1262 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1263 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1264 1265 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) { 1266 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1267 if (iwl_mvm_is_cdb_supported(mvm)) 1268 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED; 1269 } 1270 1271 if (iwl_mvm_rrm_scan_needed(mvm) && 1272 fw_has_capa(&mvm->fw->ucode_capa, 1273 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 1274 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1275 1276 if (params->pass_all) 1277 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1278 else 1279 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1280 1281 if (!iwl_mvm_is_regular_scan(params)) 1282 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1283 1284 if (params->measurement_dwell) 1285 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1286 1287 #ifdef CONFIG_IWLWIFI_DEBUGFS 1288 if (mvm->scan_iter_notif_enabled) 1289 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1290 #endif 1291 1292 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1293 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1294 1295 if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE && 1296 vif->type != NL80211_IFTYPE_P2P_DEVICE) 1297 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL; 1298 1299 /* 1300 * Extended dwell is relevant only for low band to start with, as it is 1301 * being used for social channles only (1, 6, 11), so we can check 1302 * only scan type on low band also for CDB. 1303 */ 1304 if (iwl_mvm_is_regular_scan(params) && 1305 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1306 params->type != IWL_SCAN_TYPE_FRAGMENTED && 1307 !iwl_mvm_is_adaptive_dwell_supported(mvm) && 1308 !iwl_mvm_is_oce_supported(mvm)) 1309 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1310 1311 if (iwl_mvm_is_oce_supported(mvm)) { 1312 if ((params->flags & 1313 NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE)) 1314 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE; 1315 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and 1316 * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares 1317 * the same bit, we need to make sure that we use this bit here 1318 * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be 1319 * used. */ 1320 if ((params->flags & 1321 NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) && 1322 !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm))) 1323 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP; 1324 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)) 1325 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME; 1326 } 1327 1328 return flags; 1329 } 1330 1331 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1332 struct iwl_mvm_scan_params *params, 1333 int type) 1334 { 1335 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1336 struct iwl_scan_umac_chan_param *chan_param; 1337 void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm); 1338 struct iwl_scan_req_umac_tail *sec_part = cmd_data + 1339 sizeof(struct iwl_scan_channel_cfg_umac) * 1340 mvm->fw->ucode_capa.n_scan_channels; 1341 int uid, i; 1342 u32 ssid_bitmap = 0; 1343 u8 channel_flags = 0; 1344 u16 gen_flags; 1345 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); 1346 1347 chan_param = iwl_mvm_get_scan_req_umac_channel(mvm); 1348 1349 lockdep_assert_held(&mvm->mutex); 1350 1351 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1352 return -EINVAL; 1353 1354 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1355 if (uid < 0) 1356 return uid; 1357 1358 memset(cmd, 0, ksize(cmd)); 1359 1360 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1361 1362 mvm->scan_uid_status[uid] = type; 1363 1364 cmd->uid = cpu_to_le32(uid); 1365 gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif); 1366 cmd->general_flags = cpu_to_le16(gen_flags); 1367 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) { 1368 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED) 1369 cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] = 1370 IWL_SCAN_NUM_OF_FRAGS; 1371 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED) 1372 cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] = 1373 IWL_SCAN_NUM_OF_FRAGS; 1374 } 1375 1376 cmd->scan_start_mac_id = scan_vif->id; 1377 1378 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1379 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1380 1381 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1382 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1383 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1384 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1385 1386 chan_param->flags = channel_flags; 1387 chan_param->count = params->n_channels; 1388 1389 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1390 1391 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1392 params->n_channels, ssid_bitmap, 1393 cmd_data); 1394 1395 for (i = 0; i < params->n_scan_plans; i++) { 1396 struct cfg80211_sched_scan_plan *scan_plan = 1397 ¶ms->scan_plans[i]; 1398 1399 sec_part->schedule[i].iter_count = scan_plan->iterations; 1400 sec_part->schedule[i].interval = 1401 cpu_to_le16(scan_plan->interval); 1402 } 1403 1404 /* 1405 * If the number of iterations of the last scan plan is set to 1406 * zero, it should run infinitely. However, this is not always the case. 1407 * For example, when regular scan is requested the driver sets one scan 1408 * plan with one iteration. 1409 */ 1410 if (!sec_part->schedule[i - 1].iter_count) 1411 sec_part->schedule[i - 1].iter_count = 0xff; 1412 1413 sec_part->delay = cpu_to_le16(params->delay); 1414 sec_part->preq = params->preq; 1415 1416 return 0; 1417 } 1418 1419 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1420 { 1421 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1422 } 1423 1424 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1425 { 1426 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa, 1427 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG); 1428 1429 /* This looks a bit arbitrary, but the idea is that if we run 1430 * out of possible simultaneous scans and the userspace is 1431 * trying to run a scan type that is already running, we 1432 * return -EBUSY. But if the userspace wants to start a 1433 * different type of scan, we stop the opposite type to make 1434 * space for the new request. The reason is backwards 1435 * compatibility with old wpa_supplicant that wouldn't stop a 1436 * scheduled scan before starting a normal scan. 1437 */ 1438 1439 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1440 return 0; 1441 1442 /* Use a switch, even though this is a bitmask, so that more 1443 * than one bits set will fall in default and we will warn. 1444 */ 1445 switch (type) { 1446 case IWL_MVM_SCAN_REGULAR: 1447 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1448 return -EBUSY; 1449 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1450 case IWL_MVM_SCAN_SCHED: 1451 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1452 return -EBUSY; 1453 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1454 case IWL_MVM_SCAN_NETDETECT: 1455 /* For non-unified images, there's no need to stop 1456 * anything for net-detect since the firmware is 1457 * restarted anyway. This way, any sched scans that 1458 * were running will be restarted when we resume. 1459 */ 1460 if (!unified_image) 1461 return 0; 1462 1463 /* If this is a unified image and we ran out of scans, 1464 * we need to stop something. Prefer stopping regular 1465 * scans, because the results are useless at this 1466 * point, and we should be able to keep running 1467 * another scheduled scan while suspended. 1468 */ 1469 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1470 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, 1471 true); 1472 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1473 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, 1474 true); 1475 1476 /* fall through, something is wrong if no scan was 1477 * running but we ran out of scans. 1478 */ 1479 default: 1480 WARN_ON(1); 1481 break; 1482 } 1483 1484 return -EIO; 1485 } 1486 1487 #define SCAN_TIMEOUT 20000 1488 1489 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1490 { 1491 struct delayed_work *delayed_work = to_delayed_work(work); 1492 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1493 scan_timeout_dwork); 1494 1495 IWL_ERR(mvm, "regular scan timed out\n"); 1496 1497 iwl_force_nmi(mvm->trans); 1498 } 1499 1500 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1501 struct cfg80211_scan_request *req, 1502 struct ieee80211_scan_ies *ies) 1503 { 1504 struct iwl_host_cmd hcmd = { 1505 .len = { iwl_mvm_scan_size(mvm), }, 1506 .data = { mvm->scan_cmd, }, 1507 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1508 }; 1509 struct iwl_mvm_scan_params params = {}; 1510 int ret; 1511 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1512 1513 lockdep_assert_held(&mvm->mutex); 1514 1515 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1516 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1517 return -EBUSY; 1518 } 1519 1520 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1521 if (ret) 1522 return ret; 1523 1524 /* we should have failed registration if scan_cmd was NULL */ 1525 if (WARN_ON(!mvm->scan_cmd)) 1526 return -ENOMEM; 1527 1528 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1529 return -ENOBUFS; 1530 1531 params.n_ssids = req->n_ssids; 1532 params.flags = req->flags; 1533 params.n_channels = req->n_channels; 1534 params.delay = 0; 1535 params.ssids = req->ssids; 1536 params.channels = req->channels; 1537 params.mac_addr = req->mac_addr; 1538 params.mac_addr_mask = req->mac_addr_mask; 1539 params.no_cck = req->no_cck; 1540 params.pass_all = true; 1541 params.n_match_sets = 0; 1542 params.match_sets = NULL; 1543 1544 params.scan_plans = &scan_plan; 1545 params.n_scan_plans = 1; 1546 1547 params.type = 1548 iwl_mvm_get_scan_type(mvm, 1549 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1550 1551 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms); 1552 if (ret < 0) 1553 return ret; 1554 1555 params.measurement_dwell = ret; 1556 1557 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1558 1559 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1560 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1561 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1562 IWL_MVM_SCAN_REGULAR); 1563 } else { 1564 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1565 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1566 } 1567 1568 if (ret) 1569 return ret; 1570 1571 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1572 if (ret) { 1573 /* If the scan failed, it usually means that the FW was unable 1574 * to allocate the time events. Warn on it, but maybe we 1575 * should try to send the command again with different params. 1576 */ 1577 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1578 return ret; 1579 } 1580 1581 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1582 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1583 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); 1584 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1585 1586 schedule_delayed_work(&mvm->scan_timeout_dwork, 1587 msecs_to_jiffies(SCAN_TIMEOUT)); 1588 1589 return 0; 1590 } 1591 1592 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1593 struct ieee80211_vif *vif, 1594 struct cfg80211_sched_scan_request *req, 1595 struct ieee80211_scan_ies *ies, 1596 int type) 1597 { 1598 struct iwl_host_cmd hcmd = { 1599 .len = { iwl_mvm_scan_size(mvm), }, 1600 .data = { mvm->scan_cmd, }, 1601 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1602 }; 1603 struct iwl_mvm_scan_params params = {}; 1604 int ret; 1605 1606 lockdep_assert_held(&mvm->mutex); 1607 1608 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1609 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1610 return -EBUSY; 1611 } 1612 1613 ret = iwl_mvm_check_running_scans(mvm, type); 1614 if (ret) 1615 return ret; 1616 1617 /* we should have failed registration if scan_cmd was NULL */ 1618 if (WARN_ON(!mvm->scan_cmd)) 1619 return -ENOMEM; 1620 1621 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1622 return -ENOBUFS; 1623 1624 params.n_ssids = req->n_ssids; 1625 params.flags = req->flags; 1626 params.n_channels = req->n_channels; 1627 params.ssids = req->ssids; 1628 params.channels = req->channels; 1629 params.mac_addr = req->mac_addr; 1630 params.mac_addr_mask = req->mac_addr_mask; 1631 params.no_cck = false; 1632 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1633 params.n_match_sets = req->n_match_sets; 1634 params.match_sets = req->match_sets; 1635 if (!req->n_scan_plans) 1636 return -EINVAL; 1637 1638 params.n_scan_plans = req->n_scan_plans; 1639 params.scan_plans = req->scan_plans; 1640 1641 params.type = 1642 iwl_mvm_get_scan_type(mvm, 1643 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1644 1645 /* In theory, LMAC scans can handle a 32-bit delay, but since 1646 * waiting for over 18 hours to start the scan is a bit silly 1647 * and to keep it aligned with UMAC scans (which only support 1648 * 16-bit delays), trim it down to 16-bits. 1649 */ 1650 if (req->delay > U16_MAX) { 1651 IWL_DEBUG_SCAN(mvm, 1652 "delay value is > 16-bits, set to max possible\n"); 1653 params.delay = U16_MAX; 1654 } else { 1655 params.delay = req->delay; 1656 } 1657 1658 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1659 if (ret) 1660 return ret; 1661 1662 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1663 1664 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1665 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1666 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1667 } else { 1668 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1669 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1670 } 1671 1672 if (ret) 1673 return ret; 1674 1675 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1676 if (!ret) { 1677 IWL_DEBUG_SCAN(mvm, 1678 "Sched scan request was sent successfully\n"); 1679 mvm->scan_status |= type; 1680 } else { 1681 /* If the scan failed, it usually means that the FW was unable 1682 * to allocate the time events. Warn on it, but maybe we 1683 * should try to send the command again with different params. 1684 */ 1685 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1686 } 1687 1688 return ret; 1689 } 1690 1691 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1692 struct iwl_rx_cmd_buffer *rxb) 1693 { 1694 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1695 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1696 u32 uid = __le32_to_cpu(notif->uid); 1697 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1698 1699 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1700 return; 1701 1702 /* if the scan is already stopping, we don't need to notify mac80211 */ 1703 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1704 struct cfg80211_scan_info info = { 1705 .aborted = aborted, 1706 .scan_start_tsf = mvm->scan_start, 1707 }; 1708 1709 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); 1710 ieee80211_scan_completed(mvm->hw, &info); 1711 mvm->scan_vif = NULL; 1712 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1713 cancel_delayed_work(&mvm->scan_timeout_dwork); 1714 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1715 ieee80211_sched_scan_stopped(mvm->hw); 1716 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1717 } 1718 1719 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1720 IWL_DEBUG_SCAN(mvm, 1721 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1722 uid, mvm->scan_uid_status[uid], 1723 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1724 "completed" : "aborted", 1725 iwl_mvm_ebs_status_str(notif->ebs_status)); 1726 IWL_DEBUG_SCAN(mvm, 1727 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1728 notif->last_schedule, notif->last_iter, 1729 __le32_to_cpu(notif->time_from_last_iter)); 1730 1731 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1732 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1733 mvm->last_ebs_successful = false; 1734 1735 mvm->scan_uid_status[uid] = 0; 1736 } 1737 1738 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1739 struct iwl_rx_cmd_buffer *rxb) 1740 { 1741 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1742 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1743 1744 mvm->scan_start = le64_to_cpu(notif->start_tsf); 1745 1746 IWL_DEBUG_SCAN(mvm, 1747 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n", 1748 notif->status, notif->scanned_channels); 1749 1750 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1751 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1752 ieee80211_sched_scan_results(mvm->hw); 1753 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1754 } 1755 1756 IWL_DEBUG_SCAN(mvm, 1757 "UMAC Scan iteration complete: scan started at %llu (TSF)\n", 1758 mvm->scan_start); 1759 } 1760 1761 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1762 { 1763 struct iwl_umac_scan_abort cmd = {}; 1764 int uid, ret; 1765 1766 lockdep_assert_held(&mvm->mutex); 1767 1768 /* We should always get a valid index here, because we already 1769 * checked that this type of scan was running in the generic 1770 * code. 1771 */ 1772 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1773 if (WARN_ON_ONCE(uid < 0)) 1774 return uid; 1775 1776 cmd.uid = cpu_to_le32(uid); 1777 1778 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1779 1780 ret = iwl_mvm_send_cmd_pdu(mvm, 1781 iwl_cmd_id(SCAN_ABORT_UMAC, 1782 IWL_ALWAYS_LONG_GROUP, 0), 1783 0, sizeof(cmd), &cmd); 1784 if (!ret) 1785 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1786 1787 return ret; 1788 } 1789 1790 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1791 { 1792 struct iwl_notification_wait wait_scan_done; 1793 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1794 SCAN_OFFLOAD_COMPLETE, }; 1795 int ret; 1796 1797 lockdep_assert_held(&mvm->mutex); 1798 1799 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1800 scan_done_notif, 1801 ARRAY_SIZE(scan_done_notif), 1802 NULL, NULL); 1803 1804 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1805 1806 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1807 ret = iwl_mvm_umac_scan_abort(mvm, type); 1808 else 1809 ret = iwl_mvm_lmac_scan_abort(mvm); 1810 1811 if (ret) { 1812 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1813 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1814 return ret; 1815 } 1816 1817 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1818 1819 return ret; 1820 } 1821 1822 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1823 { 1824 int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1; 1825 1826 if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) 1827 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8; 1828 else if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 1829 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7; 1830 else if (iwl_mvm_has_new_tx_api(mvm)) 1831 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6; 1832 1833 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1834 return base_size + 1835 sizeof(struct iwl_scan_channel_cfg_umac) * 1836 mvm->fw->ucode_capa.n_scan_channels + 1837 sizeof(struct iwl_scan_req_umac_tail); 1838 1839 return sizeof(struct iwl_scan_req_lmac) + 1840 sizeof(struct iwl_scan_channel_cfg_lmac) * 1841 mvm->fw->ucode_capa.n_scan_channels + 1842 sizeof(struct iwl_scan_probe_req); 1843 } 1844 1845 /* 1846 * This function is used in nic restart flow, to inform mac80211 about scans 1847 * that was aborted by restart flow or by an assert. 1848 */ 1849 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1850 { 1851 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1852 int uid, i; 1853 1854 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1855 if (uid >= 0) { 1856 struct cfg80211_scan_info info = { 1857 .aborted = true, 1858 }; 1859 1860 ieee80211_scan_completed(mvm->hw, &info); 1861 mvm->scan_uid_status[uid] = 0; 1862 } 1863 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1864 if (uid >= 0 && !mvm->fw_restart) { 1865 ieee80211_sched_scan_stopped(mvm->hw); 1866 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1867 mvm->scan_uid_status[uid] = 0; 1868 } 1869 1870 /* We shouldn't have any UIDs still set. Loop over all the 1871 * UIDs to make sure there's nothing left there and warn if 1872 * any is found. 1873 */ 1874 for (i = 0; i < mvm->max_scans; i++) { 1875 if (WARN_ONCE(mvm->scan_uid_status[i], 1876 "UMAC scan UID %d status was not cleaned\n", 1877 i)) 1878 mvm->scan_uid_status[i] = 0; 1879 } 1880 } else { 1881 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 1882 struct cfg80211_scan_info info = { 1883 .aborted = true, 1884 }; 1885 1886 ieee80211_scan_completed(mvm->hw, &info); 1887 } 1888 1889 /* Sched scan will be restarted by mac80211 in 1890 * restart_hw, so do not report if FW is about to be 1891 * restarted. 1892 */ 1893 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1894 !mvm->fw_restart) { 1895 ieee80211_sched_scan_stopped(mvm->hw); 1896 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1897 } 1898 } 1899 } 1900 1901 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1902 { 1903 int ret; 1904 1905 if (!(mvm->scan_status & type)) 1906 return 0; 1907 1908 if (iwl_mvm_is_radio_killed(mvm)) { 1909 ret = 0; 1910 goto out; 1911 } 1912 1913 ret = iwl_mvm_scan_stop_wait(mvm, type); 1914 if (!ret) 1915 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 1916 out: 1917 /* Clear the scan status so the next scan requests will 1918 * succeed and mark the scan as stopping, so that the Rx 1919 * handler doesn't do anything, as the scan was stopped from 1920 * above. 1921 */ 1922 mvm->scan_status &= ~type; 1923 1924 if (type == IWL_MVM_SCAN_REGULAR) { 1925 /* Since the rx handler won't do anything now, we have 1926 * to release the scan reference here. 1927 */ 1928 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1929 cancel_delayed_work(&mvm->scan_timeout_dwork); 1930 if (notify) { 1931 struct cfg80211_scan_info info = { 1932 .aborted = true, 1933 }; 1934 1935 ieee80211_scan_completed(mvm->hw, &info); 1936 } 1937 } else if (notify) { 1938 ieee80211_sched_scan_stopped(mvm->hw); 1939 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1940 } 1941 1942 return ret; 1943 } 1944