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 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 68 #include <linux/etherdevice.h> 69 #include <net/mac80211.h> 70 71 #include "mvm.h" 72 #include "fw/api/scan.h" 73 #include "iwl-io.h" 74 75 #define IWL_DENSE_EBS_SCAN_RATIO 5 76 #define IWL_SPARSE_EBS_SCAN_RATIO 1 77 78 enum iwl_mvm_traffic_load { 79 IWL_MVM_TRAFFIC_LOW, 80 IWL_MVM_TRAFFIC_MEDIUM, 81 IWL_MVM_TRAFFIC_HIGH, 82 }; 83 84 #define IWL_SCAN_DWELL_ACTIVE 10 85 #define IWL_SCAN_DWELL_PASSIVE 110 86 #define IWL_SCAN_DWELL_FRAGMENTED 44 87 #define IWL_SCAN_DWELL_EXTENDED 90 88 89 struct iwl_mvm_scan_timing_params { 90 u32 suspend_time; 91 u32 max_out_time; 92 }; 93 94 static struct iwl_mvm_scan_timing_params scan_timing[] = { 95 [IWL_SCAN_TYPE_UNASSOC] = { 96 .suspend_time = 0, 97 .max_out_time = 0, 98 }, 99 [IWL_SCAN_TYPE_WILD] = { 100 .suspend_time = 30, 101 .max_out_time = 120, 102 }, 103 [IWL_SCAN_TYPE_MILD] = { 104 .suspend_time = 120, 105 .max_out_time = 120, 106 }, 107 [IWL_SCAN_TYPE_FRAGMENTED] = { 108 .suspend_time = 95, 109 .max_out_time = 44, 110 }, 111 }; 112 113 struct iwl_mvm_scan_params { 114 enum iwl_mvm_scan_type type; 115 u32 n_channels; 116 u16 delay; 117 int n_ssids; 118 struct cfg80211_ssid *ssids; 119 struct ieee80211_channel **channels; 120 u32 flags; 121 u8 *mac_addr; 122 u8 *mac_addr_mask; 123 bool no_cck; 124 bool pass_all; 125 int n_match_sets; 126 struct iwl_scan_probe_req preq; 127 struct cfg80211_match_set *match_sets; 128 int n_scan_plans; 129 struct cfg80211_sched_scan_plan *scan_plans; 130 u32 measurement_dwell; 131 }; 132 133 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm) 134 { 135 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 136 137 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 138 return (void *)&cmd->v7.data; 139 140 if (iwl_mvm_has_new_tx_api(mvm)) 141 return (void *)&cmd->v6.data; 142 143 return (void *)&cmd->v1.data; 144 } 145 146 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 147 { 148 if (mvm->scan_rx_ant != ANT_NONE) 149 return mvm->scan_rx_ant; 150 return iwl_mvm_get_valid_rx_ant(mvm); 151 } 152 153 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 154 { 155 u16 rx_chain; 156 u8 rx_ant; 157 158 rx_ant = iwl_mvm_scan_rx_ant(mvm); 159 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 160 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 161 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 162 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 163 return cpu_to_le16(rx_chain); 164 } 165 166 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band) 167 { 168 if (band == NL80211_BAND_2GHZ) 169 return cpu_to_le32(PHY_BAND_24); 170 else 171 return cpu_to_le32(PHY_BAND_5); 172 } 173 174 static inline __le32 175 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band, 176 bool no_cck) 177 { 178 u32 tx_ant; 179 180 mvm->scan_last_antenna_idx = 181 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 182 mvm->scan_last_antenna_idx); 183 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 184 185 if (band == NL80211_BAND_2GHZ && !no_cck) 186 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 187 tx_ant); 188 else 189 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 190 } 191 192 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 193 struct ieee80211_vif *vif) 194 { 195 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 196 int *global_cnt = data; 197 198 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 199 mvmvif->phy_ctxt->id < NUM_PHY_CTX) 200 *global_cnt += 1; 201 } 202 203 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 204 { 205 return IWL_MVM_TRAFFIC_LOW; 206 } 207 208 static enum 209 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device) 210 { 211 int global_cnt = 0; 212 enum iwl_mvm_traffic_load load; 213 bool low_latency; 214 215 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 216 IEEE80211_IFACE_ITER_NORMAL, 217 iwl_mvm_scan_condition_iterator, 218 &global_cnt); 219 if (!global_cnt) 220 return IWL_SCAN_TYPE_UNASSOC; 221 222 load = iwl_mvm_get_traffic_load(mvm); 223 low_latency = iwl_mvm_low_latency(mvm); 224 225 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device && 226 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) 227 return IWL_SCAN_TYPE_FRAGMENTED; 228 229 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 230 return IWL_SCAN_TYPE_MILD; 231 232 return IWL_SCAN_TYPE_WILD; 233 } 234 235 static int 236 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm, 237 struct cfg80211_scan_request *req, 238 struct iwl_mvm_scan_params *params) 239 { 240 if (!req->duration) 241 return 0; 242 243 if (req->duration_mandatory && 244 req->duration > scan_timing[params->type].max_out_time) { 245 IWL_DEBUG_SCAN(mvm, 246 "Measurement scan - too long dwell %hu (max out time %u)\n", 247 req->duration, 248 scan_timing[params->type].max_out_time); 249 return -EOPNOTSUPP; 250 } 251 252 return min_t(u32, (u32)req->duration, 253 scan_timing[params->type].max_out_time); 254 } 255 256 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 257 { 258 /* require rrm scan whenever the fw supports it */ 259 return fw_has_capa(&mvm->fw->ucode_capa, 260 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 261 } 262 263 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 264 { 265 int max_probe_len; 266 267 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 268 269 /* we create the 802.11 header and SSID element */ 270 max_probe_len -= 24 + 2; 271 272 /* DS parameter set element is added on 2.4GHZ band if required */ 273 if (iwl_mvm_rrm_scan_needed(mvm)) 274 max_probe_len -= 3; 275 276 return max_probe_len; 277 } 278 279 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 280 { 281 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 282 283 /* TODO: [BUG] This function should return the maximum allowed size of 284 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 285 * in the same command. So the correct implementation of this function 286 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 287 * command has only 512 bytes and it would leave us with about 240 288 * bytes for scan IEs, which is clearly not enough. So meanwhile 289 * we will report an incorrect value. This may result in a failure to 290 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 291 * functions with -ENOBUFS, if a large enough probe will be provided. 292 */ 293 return max_ie_len; 294 } 295 296 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 297 struct iwl_rx_cmd_buffer *rxb) 298 { 299 struct iwl_rx_packet *pkt = rxb_addr(rxb); 300 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 301 302 IWL_DEBUG_SCAN(mvm, 303 "Scan offload iteration complete: status=0x%x scanned channels=%d\n", 304 notif->status, notif->scanned_channels); 305 306 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 307 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 308 ieee80211_sched_scan_results(mvm->hw); 309 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 310 } 311 } 312 313 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 314 struct iwl_rx_cmd_buffer *rxb) 315 { 316 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 317 ieee80211_sched_scan_results(mvm->hw); 318 } 319 320 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 321 { 322 switch (status) { 323 case IWL_SCAN_EBS_SUCCESS: 324 return "successful"; 325 case IWL_SCAN_EBS_INACTIVE: 326 return "inactive"; 327 case IWL_SCAN_EBS_FAILED: 328 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 329 default: 330 return "failed"; 331 } 332 } 333 334 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 335 struct iwl_rx_cmd_buffer *rxb) 336 { 337 struct iwl_rx_packet *pkt = rxb_addr(rxb); 338 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 339 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 340 341 /* If this happens, the firmware has mistakenly sent an LMAC 342 * notification during UMAC scans -- warn and ignore it. 343 */ 344 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 345 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 346 return; 347 348 /* scan status must be locked for proper checking */ 349 lockdep_assert_held(&mvm->mutex); 350 351 /* We first check if we were stopping a scan, in which case we 352 * just clear the stopping flag. Then we check if it was a 353 * firmware initiated stop, in which case we need to inform 354 * mac80211. 355 * Note that we can have a stopping and a running scan 356 * simultaneously, but we can't have two different types of 357 * scans stopping or running at the same time (since LMAC 358 * doesn't support it). 359 */ 360 361 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 362 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 363 364 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 365 aborted ? "aborted" : "completed", 366 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 367 IWL_DEBUG_SCAN(mvm, 368 "Last line %d, Last iteration %d, Time after last iteration %d\n", 369 scan_notif->last_schedule_line, 370 scan_notif->last_schedule_iteration, 371 __le32_to_cpu(scan_notif->time_after_last_iter)); 372 373 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 374 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 375 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 376 aborted ? "aborted" : "completed", 377 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 378 379 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 380 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 381 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 382 383 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 384 aborted ? "aborted" : "completed", 385 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 386 IWL_DEBUG_SCAN(mvm, 387 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 388 scan_notif->last_schedule_line, 389 scan_notif->last_schedule_iteration, 390 __le32_to_cpu(scan_notif->time_after_last_iter)); 391 392 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 393 ieee80211_sched_scan_stopped(mvm->hw); 394 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 395 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 396 struct cfg80211_scan_info info = { 397 .aborted = aborted, 398 }; 399 400 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 401 aborted ? "aborted" : "completed", 402 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 403 404 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 405 ieee80211_scan_completed(mvm->hw, &info); 406 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 407 cancel_delayed_work(&mvm->scan_timeout_dwork); 408 } else { 409 IWL_ERR(mvm, 410 "got scan complete notification but no scan is running\n"); 411 } 412 413 mvm->last_ebs_successful = 414 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 415 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 416 } 417 418 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 419 { 420 int i; 421 422 for (i = 0; i < PROBE_OPTION_MAX; i++) { 423 if (!ssid_list[i].len) 424 break; 425 if (ssid_list[i].len == ssid_len && 426 !memcmp(ssid_list->ssid, ssid, ssid_len)) 427 return i; 428 } 429 return -1; 430 } 431 432 /* We insert the SSIDs in an inverted order, because the FW will 433 * invert it back. 434 */ 435 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 436 struct iwl_ssid_ie *ssids, 437 u32 *ssid_bitmap) 438 { 439 int i, j; 440 int index; 441 442 /* 443 * copy SSIDs from match list. 444 * iwl_config_sched_scan_profiles() uses the order of these ssids to 445 * config match list. 446 */ 447 for (i = 0, j = params->n_match_sets - 1; 448 j >= 0 && i < PROBE_OPTION_MAX; 449 i++, j--) { 450 /* skip empty SSID matchsets */ 451 if (!params->match_sets[j].ssid.ssid_len) 452 continue; 453 ssids[i].id = WLAN_EID_SSID; 454 ssids[i].len = params->match_sets[j].ssid.ssid_len; 455 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 456 ssids[i].len); 457 } 458 459 /* add SSIDs from scan SSID list */ 460 *ssid_bitmap = 0; 461 for (j = params->n_ssids - 1; 462 j >= 0 && i < PROBE_OPTION_MAX; 463 i++, j--) { 464 index = iwl_ssid_exist(params->ssids[j].ssid, 465 params->ssids[j].ssid_len, 466 ssids); 467 if (index < 0) { 468 ssids[i].id = WLAN_EID_SSID; 469 ssids[i].len = params->ssids[j].ssid_len; 470 memcpy(ssids[i].ssid, params->ssids[j].ssid, 471 ssids[i].len); 472 *ssid_bitmap |= BIT(i); 473 } else { 474 *ssid_bitmap |= BIT(index); 475 } 476 } 477 } 478 479 static int 480 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 481 struct cfg80211_sched_scan_request *req) 482 { 483 struct iwl_scan_offload_profile *profile; 484 struct iwl_scan_offload_profile_cfg *profile_cfg; 485 struct iwl_scan_offload_blacklist *blacklist; 486 struct iwl_host_cmd cmd = { 487 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 488 .len[1] = sizeof(*profile_cfg), 489 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 490 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 491 }; 492 int blacklist_len; 493 int i; 494 int ret; 495 496 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 497 return -EIO; 498 499 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 500 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 501 else 502 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 503 504 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); 505 if (!blacklist) 506 return -ENOMEM; 507 508 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 509 if (!profile_cfg) { 510 ret = -ENOMEM; 511 goto free_blacklist; 512 } 513 514 cmd.data[0] = blacklist; 515 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 516 cmd.data[1] = profile_cfg; 517 518 /* No blacklist configuration */ 519 520 profile_cfg->num_profiles = req->n_match_sets; 521 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 522 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 523 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 524 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 525 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 526 527 for (i = 0; i < req->n_match_sets; i++) { 528 profile = &profile_cfg->profiles[i]; 529 profile->ssid_index = i; 530 /* Support any cipher and auth algorithm */ 531 profile->unicast_cipher = 0xff; 532 profile->auth_alg = 0xff; 533 profile->network_type = IWL_NETWORK_TYPE_ANY; 534 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 535 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 536 } 537 538 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 539 540 ret = iwl_mvm_send_cmd(mvm, &cmd); 541 kfree(profile_cfg); 542 free_blacklist: 543 kfree(blacklist); 544 545 return ret; 546 } 547 548 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 549 struct cfg80211_sched_scan_request *req) 550 { 551 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 552 IWL_DEBUG_SCAN(mvm, 553 "Sending scheduled scan with filtering, n_match_sets %d\n", 554 req->n_match_sets); 555 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 556 return false; 557 } 558 559 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 560 561 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 562 return true; 563 } 564 565 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 566 { 567 int ret; 568 struct iwl_host_cmd cmd = { 569 .id = SCAN_OFFLOAD_ABORT_CMD, 570 }; 571 u32 status = CAN_ABORT_STATUS; 572 573 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 574 if (ret) 575 return ret; 576 577 if (status != CAN_ABORT_STATUS) { 578 /* 579 * The scan abort will return 1 for success or 580 * 2 for "failure". A failure condition can be 581 * due to simply not being in an active scan which 582 * can occur if we send the scan abort before the 583 * microcode has notified us that a scan is completed. 584 */ 585 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 586 ret = -ENOENT; 587 } 588 589 return ret; 590 } 591 592 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 593 struct iwl_scan_req_tx_cmd *tx_cmd, 594 bool no_cck) 595 { 596 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 597 TX_CMD_FLG_BT_DIS); 598 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 599 NL80211_BAND_2GHZ, 600 no_cck); 601 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 602 603 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 604 TX_CMD_FLG_BT_DIS); 605 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 606 NL80211_BAND_5GHZ, 607 no_cck); 608 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 609 } 610 611 static void 612 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 613 struct ieee80211_channel **channels, 614 int n_channels, u32 ssid_bitmap, 615 struct iwl_scan_req_lmac *cmd) 616 { 617 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 618 int i; 619 620 for (i = 0; i < n_channels; i++) { 621 channel_cfg[i].channel_num = 622 cpu_to_le16(channels[i]->hw_value); 623 channel_cfg[i].iter_count = cpu_to_le16(1); 624 channel_cfg[i].iter_interval = 0; 625 channel_cfg[i].flags = 626 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 627 ssid_bitmap); 628 } 629 } 630 631 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 632 size_t len, u8 *const pos) 633 { 634 static const u8 before_ds_params[] = { 635 WLAN_EID_SSID, 636 WLAN_EID_SUPP_RATES, 637 WLAN_EID_REQUEST, 638 WLAN_EID_EXT_SUPP_RATES, 639 }; 640 size_t offs; 641 u8 *newpos = pos; 642 643 if (!iwl_mvm_rrm_scan_needed(mvm)) { 644 memcpy(newpos, ies, len); 645 return newpos + len; 646 } 647 648 offs = ieee80211_ie_split(ies, len, 649 before_ds_params, 650 ARRAY_SIZE(before_ds_params), 651 0); 652 653 memcpy(newpos, ies, offs); 654 newpos += offs; 655 656 /* Add a placeholder for DS Parameter Set element */ 657 *newpos++ = WLAN_EID_DS_PARAMS; 658 *newpos++ = 1; 659 *newpos++ = 0; 660 661 memcpy(newpos, ies + offs, len - offs); 662 newpos += len - offs; 663 664 return newpos; 665 } 666 667 #define WFA_TPC_IE_LEN 9 668 669 static void iwl_mvm_add_tpc_report_ie(u8 *pos) 670 { 671 pos[0] = WLAN_EID_VENDOR_SPECIFIC; 672 pos[1] = WFA_TPC_IE_LEN - 2; 673 pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff; 674 pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff; 675 pos[4] = WLAN_OUI_MICROSOFT & 0xff; 676 pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC; 677 pos[6] = 0; 678 /* pos[7] - tx power will be inserted by the FW */ 679 pos[7] = 0; 680 pos[8] = 0; 681 } 682 683 static void 684 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 685 struct ieee80211_scan_ies *ies, 686 struct iwl_mvm_scan_params *params) 687 { 688 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 689 u8 *pos, *newpos; 690 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 691 params->mac_addr : NULL; 692 693 /* 694 * Unfortunately, right now the offload scan doesn't support randomising 695 * within the firmware, so until the firmware API is ready we implement 696 * it in the driver. This means that the scan iterations won't really be 697 * random, only when it's restarted, but at least that helps a bit. 698 */ 699 if (mac_addr) 700 get_random_mask_addr(frame->sa, mac_addr, 701 params->mac_addr_mask); 702 else 703 memcpy(frame->sa, vif->addr, ETH_ALEN); 704 705 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 706 eth_broadcast_addr(frame->da); 707 eth_broadcast_addr(frame->bssid); 708 frame->seq_ctrl = 0; 709 710 pos = frame->u.probe_req.variable; 711 *pos++ = WLAN_EID_SSID; 712 *pos++ = 0; 713 714 params->preq.mac_header.offset = 0; 715 params->preq.mac_header.len = cpu_to_le16(24 + 2); 716 717 /* Insert ds parameter set element on 2.4 GHz band */ 718 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 719 ies->ies[NL80211_BAND_2GHZ], 720 ies->len[NL80211_BAND_2GHZ], 721 pos); 722 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 723 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 724 pos = newpos; 725 726 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 727 ies->len[NL80211_BAND_5GHZ]); 728 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 729 params->preq.band_data[1].len = 730 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 731 pos += ies->len[NL80211_BAND_5GHZ]; 732 733 memcpy(pos, ies->common_ies, ies->common_ie_len); 734 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 735 736 if (iwl_mvm_rrm_scan_needed(mvm) && 737 !fw_has_capa(&mvm->fw->ucode_capa, 738 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) { 739 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len); 740 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len + 741 WFA_TPC_IE_LEN); 742 } else { 743 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 744 } 745 } 746 747 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 748 struct iwl_scan_req_lmac *cmd, 749 struct iwl_mvm_scan_params *params) 750 { 751 cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE; 752 cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE; 753 cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 754 cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED; 755 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 756 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 757 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 758 } 759 760 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 761 struct ieee80211_scan_ies *ies, 762 int n_channels) 763 { 764 return ((n_ssids <= PROBE_OPTION_MAX) && 765 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 766 (ies->common_ie_len + 767 ies->len[NL80211_BAND_2GHZ] + 768 ies->len[NL80211_BAND_5GHZ] <= 769 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 770 } 771 772 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 773 struct ieee80211_vif *vif) 774 { 775 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 776 777 /* We can only use EBS if: 778 * 1. the feature is supported; 779 * 2. the last EBS was successful; 780 * 3. if only single scan, the single scan EBS API is supported; 781 * 4. it's not a p2p find operation. 782 */ 783 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 784 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS && 785 vif->type != NL80211_IFTYPE_P2P_DEVICE); 786 } 787 788 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 789 { 790 return params->n_scan_plans == 1 && 791 params->scan_plans[0].iterations == 1; 792 } 793 794 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 795 struct iwl_mvm_scan_params *params, 796 struct ieee80211_vif *vif) 797 { 798 int flags = 0; 799 800 if (params->n_ssids == 0) 801 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 802 803 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 804 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 805 806 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 807 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 808 809 if (iwl_mvm_rrm_scan_needed(mvm) && 810 fw_has_capa(&mvm->fw->ucode_capa, 811 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 812 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 813 814 if (params->pass_all) 815 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 816 else 817 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 818 819 #ifdef CONFIG_IWLWIFI_DEBUGFS 820 if (mvm->scan_iter_notif_enabled) 821 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 822 #endif 823 824 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 825 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 826 827 if (iwl_mvm_is_regular_scan(params) && 828 vif->type != NL80211_IFTYPE_P2P_DEVICE && 829 params->type != IWL_SCAN_TYPE_FRAGMENTED) 830 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 831 832 return flags; 833 } 834 835 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 836 struct iwl_mvm_scan_params *params) 837 { 838 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 839 struct iwl_scan_probe_req *preq = 840 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 841 mvm->fw->ucode_capa.n_scan_channels); 842 u32 ssid_bitmap = 0; 843 int i; 844 845 lockdep_assert_held(&mvm->mutex); 846 847 memset(cmd, 0, ksize(cmd)); 848 849 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 850 return -EINVAL; 851 852 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 853 854 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 855 cmd->iter_num = cpu_to_le32(1); 856 cmd->n_channels = (u8)params->n_channels; 857 858 cmd->delay = cpu_to_le32(params->delay); 859 860 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 861 vif)); 862 863 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 864 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 865 MAC_FILTER_IN_BEACON); 866 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 867 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 868 869 /* this API uses bits 1-20 instead of 0-19 */ 870 ssid_bitmap <<= 1; 871 872 for (i = 0; i < params->n_scan_plans; i++) { 873 struct cfg80211_sched_scan_plan *scan_plan = 874 ¶ms->scan_plans[i]; 875 876 cmd->schedule[i].delay = 877 cpu_to_le16(scan_plan->interval); 878 cmd->schedule[i].iterations = scan_plan->iterations; 879 cmd->schedule[i].full_scan_mul = 1; 880 } 881 882 /* 883 * If the number of iterations of the last scan plan is set to 884 * zero, it should run infinitely. However, this is not always the case. 885 * For example, when regular scan is requested the driver sets one scan 886 * plan with one iteration. 887 */ 888 if (!cmd->schedule[i - 1].iterations) 889 cmd->schedule[i - 1].iterations = 0xff; 890 891 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 892 cmd->channel_opt[0].flags = 893 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 894 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 895 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 896 cmd->channel_opt[0].non_ebs_ratio = 897 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 898 cmd->channel_opt[1].flags = 899 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 900 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 901 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 902 cmd->channel_opt[1].non_ebs_ratio = 903 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 904 } 905 906 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 907 params->n_channels, ssid_bitmap, cmd); 908 909 *preq = params->preq; 910 911 return 0; 912 } 913 914 static int rate_to_scan_rate_flag(unsigned int rate) 915 { 916 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 917 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 918 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 919 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 920 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 921 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 922 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 923 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 924 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 925 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 926 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 927 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 928 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 929 }; 930 931 return rate_to_scan_rate[rate]; 932 } 933 934 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 935 { 936 struct ieee80211_supported_band *band; 937 unsigned int rates = 0; 938 int i; 939 940 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 941 for (i = 0; i < band->n_bitrates; i++) 942 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 943 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 944 for (i = 0; i < band->n_bitrates; i++) 945 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 946 947 /* Set both basic rates and supported rates */ 948 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 949 950 return cpu_to_le32(rates); 951 } 952 953 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm, 954 struct iwl_scan_dwell *dwell) 955 { 956 dwell->active = IWL_SCAN_DWELL_ACTIVE; 957 dwell->passive = IWL_SCAN_DWELL_PASSIVE; 958 dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED; 959 dwell->extended = IWL_SCAN_DWELL_EXTENDED; 960 } 961 962 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels) 963 { 964 struct ieee80211_supported_band *band; 965 int i, j = 0; 966 967 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 968 for (i = 0; i < band->n_channels; i++, j++) 969 channels[j] = band->channels[i].hw_value; 970 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 971 for (i = 0; i < band->n_channels; i++, j++) 972 channels[j] = band->channels[i].hw_value; 973 } 974 975 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config, 976 u32 flags, u8 channel_flags) 977 { 978 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 979 struct iwl_scan_config_v1 *cfg = config; 980 981 cfg->flags = cpu_to_le32(flags); 982 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 983 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 984 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 985 cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time); 986 cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 987 988 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 989 990 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 991 992 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 993 cfg->channel_flags = channel_flags; 994 995 iwl_mvm_fill_channels(mvm, cfg->channel_array); 996 } 997 998 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config, 999 u32 flags, u8 channel_flags) 1000 { 1001 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1002 struct iwl_scan_config *cfg = config; 1003 1004 cfg->flags = cpu_to_le32(flags); 1005 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 1006 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 1007 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 1008 cfg->out_of_channel_time[0] = 1009 cpu_to_le32(scan_timing[type].max_out_time); 1010 cfg->suspend_time[0] = cpu_to_le32(scan_timing[type].suspend_time); 1011 1012 if (iwl_mvm_is_cdb_supported(mvm)) { 1013 cfg->suspend_time[1] = 1014 cpu_to_le32(scan_timing[type].suspend_time); 1015 cfg->out_of_channel_time[1] = 1016 cpu_to_le32(scan_timing[type].max_out_time); 1017 } 1018 1019 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 1020 1021 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 1022 1023 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 1024 cfg->channel_flags = channel_flags; 1025 1026 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1027 } 1028 1029 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 1030 { 1031 void *cfg; 1032 int ret, cmd_size; 1033 struct iwl_host_cmd cmd = { 1034 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 1035 }; 1036 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1037 int num_channels = 1038 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 1039 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 1040 u32 flags; 1041 u8 channel_flags; 1042 1043 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 1044 return -ENOBUFS; 1045 1046 if (type == mvm->scan_type) 1047 return 0; 1048 1049 if (iwl_mvm_has_new_tx_api(mvm)) 1050 cmd_size = sizeof(struct iwl_scan_config); 1051 else 1052 cmd_size = sizeof(struct iwl_scan_config_v1); 1053 cmd_size += mvm->fw->ucode_capa.n_scan_channels; 1054 1055 cfg = kzalloc(cmd_size, GFP_KERNEL); 1056 if (!cfg) 1057 return -ENOMEM; 1058 1059 flags = SCAN_CONFIG_FLAG_ACTIVATE | 1060 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 1061 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 1062 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 1063 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 1064 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 1065 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 1066 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 1067 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS | 1068 SCAN_CONFIG_N_CHANNELS(num_channels) | 1069 (type == IWL_SCAN_TYPE_FRAGMENTED ? 1070 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 1071 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 1072 1073 channel_flags = IWL_CHANNEL_FLAG_EBS | 1074 IWL_CHANNEL_FLAG_ACCURATE_EBS | 1075 IWL_CHANNEL_FLAG_EBS_ADD | 1076 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 1077 1078 if (iwl_mvm_has_new_tx_api(mvm)) { 1079 flags |= (type == IWL_SCAN_TYPE_FRAGMENTED) ? 1080 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED : 1081 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED; 1082 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags); 1083 } else { 1084 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags); 1085 } 1086 1087 cmd.data[0] = cfg; 1088 cmd.len[0] = cmd_size; 1089 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1090 1091 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1092 1093 ret = iwl_mvm_send_cmd(mvm, &cmd); 1094 if (!ret) 1095 mvm->scan_type = type; 1096 1097 kfree(cfg); 1098 return ret; 1099 } 1100 1101 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1102 { 1103 int i; 1104 1105 for (i = 0; i < mvm->max_scans; i++) 1106 if (mvm->scan_uid_status[i] == status) 1107 return i; 1108 1109 return -ENOENT; 1110 } 1111 1112 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1113 struct iwl_scan_req_umac *cmd, 1114 struct iwl_mvm_scan_params *params) 1115 { 1116 struct iwl_mvm_scan_timing_params *timing = &scan_timing[params->type]; 1117 1118 if (iwl_mvm_is_regular_scan(params)) 1119 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1120 else 1121 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2); 1122 1123 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1124 if (params->measurement_dwell) { 1125 cmd->v7.active_dwell = params->measurement_dwell; 1126 cmd->v7.passive_dwell = params->measurement_dwell; 1127 } else { 1128 cmd->v7.active_dwell = IWL_SCAN_DWELL_ACTIVE; 1129 cmd->v7.passive_dwell = IWL_SCAN_DWELL_PASSIVE; 1130 } 1131 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1132 1133 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1134 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] = 1135 cpu_to_le32(timing->max_out_time); 1136 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] = 1137 cpu_to_le32(timing->suspend_time); 1138 if (iwl_mvm_is_cdb_supported(mvm)) { 1139 cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] = 1140 cpu_to_le32(timing->max_out_time); 1141 cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] = 1142 cpu_to_le32(timing->suspend_time); 1143 } 1144 1145 return; 1146 } 1147 1148 if (params->measurement_dwell) { 1149 cmd->v1.active_dwell = params->measurement_dwell; 1150 cmd->v1.passive_dwell = params->measurement_dwell; 1151 cmd->v1.extended_dwell = params->measurement_dwell; 1152 } else { 1153 cmd->v1.active_dwell = IWL_SCAN_DWELL_ACTIVE; 1154 cmd->v1.passive_dwell = IWL_SCAN_DWELL_PASSIVE; 1155 cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED; 1156 } 1157 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1158 1159 if (iwl_mvm_has_new_tx_api(mvm)) { 1160 cmd->v6.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1161 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] = 1162 cpu_to_le32(timing->max_out_time); 1163 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] = 1164 cpu_to_le32(timing->suspend_time); 1165 if (iwl_mvm_is_cdb_supported(mvm)) { 1166 cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] = 1167 cpu_to_le32(timing->max_out_time); 1168 cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] = 1169 cpu_to_le32(timing->suspend_time); 1170 } 1171 } else { 1172 cmd->v1.max_out_time = cpu_to_le32(timing->max_out_time); 1173 cmd->v1.suspend_time = cpu_to_le32(timing->suspend_time); 1174 cmd->v1.scan_priority = 1175 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1176 } 1177 } 1178 1179 static void 1180 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1181 struct ieee80211_channel **channels, 1182 int n_channels, u32 ssid_bitmap, 1183 struct iwl_scan_channel_cfg_umac *channel_cfg) 1184 { 1185 int i; 1186 1187 for (i = 0; i < n_channels; i++) { 1188 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1189 channel_cfg[i].channel_num = channels[i]->hw_value; 1190 channel_cfg[i].iter_count = 1; 1191 channel_cfg[i].iter_interval = 0; 1192 } 1193 } 1194 1195 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1196 struct iwl_mvm_scan_params *params, 1197 struct ieee80211_vif *vif) 1198 { 1199 u16 flags = 0; 1200 1201 if (params->n_ssids == 0) 1202 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1203 1204 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1205 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1206 1207 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) { 1208 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1209 if (iwl_mvm_is_cdb_supported(mvm)) 1210 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED; 1211 } 1212 1213 if (iwl_mvm_rrm_scan_needed(mvm) && 1214 fw_has_capa(&mvm->fw->ucode_capa, 1215 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) 1216 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1217 1218 if (params->pass_all) 1219 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1220 else 1221 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1222 1223 if (!iwl_mvm_is_regular_scan(params)) 1224 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1225 1226 if (params->measurement_dwell) 1227 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1228 1229 #ifdef CONFIG_IWLWIFI_DEBUGFS 1230 if (mvm->scan_iter_notif_enabled) 1231 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1232 #endif 1233 1234 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1235 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1236 1237 if (iwl_mvm_is_regular_scan(params) && 1238 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1239 params->type != IWL_SCAN_TYPE_FRAGMENTED) 1240 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1241 1242 return flags; 1243 } 1244 1245 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1246 struct iwl_mvm_scan_params *params, 1247 int type) 1248 { 1249 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1250 void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm); 1251 struct iwl_scan_req_umac_tail *sec_part = cmd_data + 1252 sizeof(struct iwl_scan_channel_cfg_umac) * 1253 mvm->fw->ucode_capa.n_scan_channels; 1254 int uid, i; 1255 u32 ssid_bitmap = 0; 1256 u8 channel_flags = 0; 1257 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); 1258 1259 lockdep_assert_held(&mvm->mutex); 1260 1261 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1262 return -EINVAL; 1263 1264 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1265 if (uid < 0) 1266 return uid; 1267 1268 memset(cmd, 0, ksize(cmd)); 1269 1270 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1271 1272 mvm->scan_uid_status[uid] = type; 1273 1274 cmd->uid = cpu_to_le32(uid); 1275 cmd->general_flags = cpu_to_le16(iwl_mvm_scan_umac_flags(mvm, params, 1276 vif)); 1277 cmd->scan_start_mac_id = scan_vif->id; 1278 1279 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1280 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1281 1282 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1283 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1284 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1285 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1286 1287 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1288 cmd->v7.channel_flags = channel_flags; 1289 cmd->v7.n_channels = params->n_channels; 1290 } else if (iwl_mvm_has_new_tx_api(mvm)) { 1291 cmd->v6.channel_flags = channel_flags; 1292 cmd->v6.n_channels = params->n_channels; 1293 } else { 1294 cmd->v1.channel_flags = channel_flags; 1295 cmd->v1.n_channels = params->n_channels; 1296 } 1297 1298 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1299 1300 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1301 params->n_channels, ssid_bitmap, 1302 cmd_data); 1303 1304 for (i = 0; i < params->n_scan_plans; i++) { 1305 struct cfg80211_sched_scan_plan *scan_plan = 1306 ¶ms->scan_plans[i]; 1307 1308 sec_part->schedule[i].iter_count = scan_plan->iterations; 1309 sec_part->schedule[i].interval = 1310 cpu_to_le16(scan_plan->interval); 1311 } 1312 1313 /* 1314 * If the number of iterations of the last scan plan is set to 1315 * zero, it should run infinitely. However, this is not always the case. 1316 * For example, when regular scan is requested the driver sets one scan 1317 * plan with one iteration. 1318 */ 1319 if (!sec_part->schedule[i - 1].iter_count) 1320 sec_part->schedule[i - 1].iter_count = 0xff; 1321 1322 sec_part->delay = cpu_to_le16(params->delay); 1323 sec_part->preq = params->preq; 1324 1325 return 0; 1326 } 1327 1328 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1329 { 1330 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1331 } 1332 1333 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1334 { 1335 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa, 1336 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG); 1337 1338 /* This looks a bit arbitrary, but the idea is that if we run 1339 * out of possible simultaneous scans and the userspace is 1340 * trying to run a scan type that is already running, we 1341 * return -EBUSY. But if the userspace wants to start a 1342 * different type of scan, we stop the opposite type to make 1343 * space for the new request. The reason is backwards 1344 * compatibility with old wpa_supplicant that wouldn't stop a 1345 * scheduled scan before starting a normal scan. 1346 */ 1347 1348 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1349 return 0; 1350 1351 /* Use a switch, even though this is a bitmask, so that more 1352 * than one bits set will fall in default and we will warn. 1353 */ 1354 switch (type) { 1355 case IWL_MVM_SCAN_REGULAR: 1356 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1357 return -EBUSY; 1358 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1359 case IWL_MVM_SCAN_SCHED: 1360 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1361 return -EBUSY; 1362 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1363 case IWL_MVM_SCAN_NETDETECT: 1364 /* For non-unified images, there's no need to stop 1365 * anything for net-detect since the firmware is 1366 * restarted anyway. This way, any sched scans that 1367 * were running will be restarted when we resume. 1368 */ 1369 if (!unified_image) 1370 return 0; 1371 1372 /* If this is a unified image and we ran out of scans, 1373 * we need to stop something. Prefer stopping regular 1374 * scans, because the results are useless at this 1375 * point, and we should be able to keep running 1376 * another scheduled scan while suspended. 1377 */ 1378 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1379 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, 1380 true); 1381 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1382 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, 1383 true); 1384 1385 /* fall through, something is wrong if no scan was 1386 * running but we ran out of scans. 1387 */ 1388 default: 1389 WARN_ON(1); 1390 break; 1391 } 1392 1393 return -EIO; 1394 } 1395 1396 #define SCAN_TIMEOUT 20000 1397 1398 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1399 { 1400 struct delayed_work *delayed_work = to_delayed_work(work); 1401 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1402 scan_timeout_dwork); 1403 1404 IWL_ERR(mvm, "regular scan timed out\n"); 1405 1406 iwl_force_nmi(mvm->trans); 1407 } 1408 1409 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1410 struct cfg80211_scan_request *req, 1411 struct ieee80211_scan_ies *ies) 1412 { 1413 struct iwl_host_cmd hcmd = { 1414 .len = { iwl_mvm_scan_size(mvm), }, 1415 .data = { mvm->scan_cmd, }, 1416 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1417 }; 1418 struct iwl_mvm_scan_params params = {}; 1419 int ret; 1420 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1421 1422 lockdep_assert_held(&mvm->mutex); 1423 1424 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1425 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1426 return -EBUSY; 1427 } 1428 1429 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1430 if (ret) 1431 return ret; 1432 1433 /* we should have failed registration if scan_cmd was NULL */ 1434 if (WARN_ON(!mvm->scan_cmd)) 1435 return -ENOMEM; 1436 1437 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1438 return -ENOBUFS; 1439 1440 params.n_ssids = req->n_ssids; 1441 params.flags = req->flags; 1442 params.n_channels = req->n_channels; 1443 params.delay = 0; 1444 params.ssids = req->ssids; 1445 params.channels = req->channels; 1446 params.mac_addr = req->mac_addr; 1447 params.mac_addr_mask = req->mac_addr_mask; 1448 params.no_cck = req->no_cck; 1449 params.pass_all = true; 1450 params.n_match_sets = 0; 1451 params.match_sets = NULL; 1452 1453 params.scan_plans = &scan_plan; 1454 params.n_scan_plans = 1; 1455 1456 params.type = 1457 iwl_mvm_get_scan_type(mvm, 1458 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1459 1460 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms); 1461 if (ret < 0) 1462 return ret; 1463 1464 params.measurement_dwell = ret; 1465 1466 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1467 1468 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1469 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1470 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1471 IWL_MVM_SCAN_REGULAR); 1472 } else { 1473 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1474 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1475 } 1476 1477 if (ret) 1478 return ret; 1479 1480 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1481 if (ret) { 1482 /* If the scan failed, it usually means that the FW was unable 1483 * to allocate the time events. Warn on it, but maybe we 1484 * should try to send the command again with different params. 1485 */ 1486 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1487 return ret; 1488 } 1489 1490 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1491 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1492 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); 1493 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1494 1495 schedule_delayed_work(&mvm->scan_timeout_dwork, 1496 msecs_to_jiffies(SCAN_TIMEOUT)); 1497 1498 return 0; 1499 } 1500 1501 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1502 struct ieee80211_vif *vif, 1503 struct cfg80211_sched_scan_request *req, 1504 struct ieee80211_scan_ies *ies, 1505 int type) 1506 { 1507 struct iwl_host_cmd hcmd = { 1508 .len = { iwl_mvm_scan_size(mvm), }, 1509 .data = { mvm->scan_cmd, }, 1510 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1511 }; 1512 struct iwl_mvm_scan_params params = {}; 1513 int ret; 1514 1515 lockdep_assert_held(&mvm->mutex); 1516 1517 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1518 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1519 return -EBUSY; 1520 } 1521 1522 ret = iwl_mvm_check_running_scans(mvm, type); 1523 if (ret) 1524 return ret; 1525 1526 /* we should have failed registration if scan_cmd was NULL */ 1527 if (WARN_ON(!mvm->scan_cmd)) 1528 return -ENOMEM; 1529 1530 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1531 return -ENOBUFS; 1532 1533 params.n_ssids = req->n_ssids; 1534 params.flags = req->flags; 1535 params.n_channels = req->n_channels; 1536 params.ssids = req->ssids; 1537 params.channels = req->channels; 1538 params.mac_addr = req->mac_addr; 1539 params.mac_addr_mask = req->mac_addr_mask; 1540 params.no_cck = false; 1541 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1542 params.n_match_sets = req->n_match_sets; 1543 params.match_sets = req->match_sets; 1544 if (!req->n_scan_plans) 1545 return -EINVAL; 1546 1547 params.n_scan_plans = req->n_scan_plans; 1548 params.scan_plans = req->scan_plans; 1549 1550 params.type = 1551 iwl_mvm_get_scan_type(mvm, 1552 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1553 1554 /* In theory, LMAC scans can handle a 32-bit delay, but since 1555 * waiting for over 18 hours to start the scan is a bit silly 1556 * and to keep it aligned with UMAC scans (which only support 1557 * 16-bit delays), trim it down to 16-bits. 1558 */ 1559 if (req->delay > U16_MAX) { 1560 IWL_DEBUG_SCAN(mvm, 1561 "delay value is > 16-bits, set to max possible\n"); 1562 params.delay = U16_MAX; 1563 } else { 1564 params.delay = req->delay; 1565 } 1566 1567 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1568 if (ret) 1569 return ret; 1570 1571 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1572 1573 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1574 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1575 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1576 } else { 1577 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1578 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1579 } 1580 1581 if (ret) 1582 return ret; 1583 1584 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1585 if (!ret) { 1586 IWL_DEBUG_SCAN(mvm, 1587 "Sched scan request was sent successfully\n"); 1588 mvm->scan_status |= type; 1589 } else { 1590 /* If the scan failed, it usually means that the FW was unable 1591 * to allocate the time events. Warn on it, but maybe we 1592 * should try to send the command again with different params. 1593 */ 1594 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1595 } 1596 1597 return ret; 1598 } 1599 1600 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1601 struct iwl_rx_cmd_buffer *rxb) 1602 { 1603 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1604 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1605 u32 uid = __le32_to_cpu(notif->uid); 1606 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1607 1608 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1609 return; 1610 1611 /* if the scan is already stopping, we don't need to notify mac80211 */ 1612 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1613 struct cfg80211_scan_info info = { 1614 .aborted = aborted, 1615 .scan_start_tsf = mvm->scan_start, 1616 }; 1617 1618 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); 1619 ieee80211_scan_completed(mvm->hw, &info); 1620 mvm->scan_vif = NULL; 1621 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1622 cancel_delayed_work(&mvm->scan_timeout_dwork); 1623 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1624 ieee80211_sched_scan_stopped(mvm->hw); 1625 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1626 } 1627 1628 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1629 IWL_DEBUG_SCAN(mvm, 1630 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1631 uid, mvm->scan_uid_status[uid], 1632 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1633 "completed" : "aborted", 1634 iwl_mvm_ebs_status_str(notif->ebs_status)); 1635 IWL_DEBUG_SCAN(mvm, 1636 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1637 notif->last_schedule, notif->last_iter, 1638 __le32_to_cpu(notif->time_from_last_iter)); 1639 1640 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1641 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1642 mvm->last_ebs_successful = false; 1643 1644 mvm->scan_uid_status[uid] = 0; 1645 } 1646 1647 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1648 struct iwl_rx_cmd_buffer *rxb) 1649 { 1650 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1651 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1652 1653 mvm->scan_start = le64_to_cpu(notif->start_tsf); 1654 1655 IWL_DEBUG_SCAN(mvm, 1656 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n", 1657 notif->status, notif->scanned_channels); 1658 1659 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1660 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1661 ieee80211_sched_scan_results(mvm->hw); 1662 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1663 } 1664 1665 IWL_DEBUG_SCAN(mvm, 1666 "UMAC Scan iteration complete: scan started at %llu (TSF)\n", 1667 mvm->scan_start); 1668 } 1669 1670 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1671 { 1672 struct iwl_umac_scan_abort cmd = {}; 1673 int uid, ret; 1674 1675 lockdep_assert_held(&mvm->mutex); 1676 1677 /* We should always get a valid index here, because we already 1678 * checked that this type of scan was running in the generic 1679 * code. 1680 */ 1681 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1682 if (WARN_ON_ONCE(uid < 0)) 1683 return uid; 1684 1685 cmd.uid = cpu_to_le32(uid); 1686 1687 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1688 1689 ret = iwl_mvm_send_cmd_pdu(mvm, 1690 iwl_cmd_id(SCAN_ABORT_UMAC, 1691 IWL_ALWAYS_LONG_GROUP, 0), 1692 0, sizeof(cmd), &cmd); 1693 if (!ret) 1694 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1695 1696 return ret; 1697 } 1698 1699 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1700 { 1701 struct iwl_notification_wait wait_scan_done; 1702 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1703 SCAN_OFFLOAD_COMPLETE, }; 1704 int ret; 1705 1706 lockdep_assert_held(&mvm->mutex); 1707 1708 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1709 scan_done_notif, 1710 ARRAY_SIZE(scan_done_notif), 1711 NULL, NULL); 1712 1713 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1714 1715 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1716 ret = iwl_mvm_umac_scan_abort(mvm, type); 1717 else 1718 ret = iwl_mvm_lmac_scan_abort(mvm); 1719 1720 if (ret) { 1721 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1722 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1723 return ret; 1724 } 1725 1726 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1727 1728 return ret; 1729 } 1730 1731 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1732 { 1733 int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1; 1734 1735 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 1736 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7; 1737 else if (iwl_mvm_has_new_tx_api(mvm)) 1738 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6; 1739 1740 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1741 return base_size + 1742 sizeof(struct iwl_scan_channel_cfg_umac) * 1743 mvm->fw->ucode_capa.n_scan_channels + 1744 sizeof(struct iwl_scan_req_umac_tail); 1745 1746 return sizeof(struct iwl_scan_req_lmac) + 1747 sizeof(struct iwl_scan_channel_cfg_lmac) * 1748 mvm->fw->ucode_capa.n_scan_channels + 1749 sizeof(struct iwl_scan_probe_req); 1750 } 1751 1752 /* 1753 * This function is used in nic restart flow, to inform mac80211 about scans 1754 * that was aborted by restart flow or by an assert. 1755 */ 1756 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1757 { 1758 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1759 int uid, i; 1760 1761 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1762 if (uid >= 0) { 1763 struct cfg80211_scan_info info = { 1764 .aborted = true, 1765 }; 1766 1767 ieee80211_scan_completed(mvm->hw, &info); 1768 mvm->scan_uid_status[uid] = 0; 1769 } 1770 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1771 if (uid >= 0 && !mvm->fw_restart) { 1772 ieee80211_sched_scan_stopped(mvm->hw); 1773 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1774 mvm->scan_uid_status[uid] = 0; 1775 } 1776 1777 /* We shouldn't have any UIDs still set. Loop over all the 1778 * UIDs to make sure there's nothing left there and warn if 1779 * any is found. 1780 */ 1781 for (i = 0; i < mvm->max_scans; i++) { 1782 if (WARN_ONCE(mvm->scan_uid_status[i], 1783 "UMAC scan UID %d status was not cleaned\n", 1784 i)) 1785 mvm->scan_uid_status[i] = 0; 1786 } 1787 } else { 1788 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 1789 struct cfg80211_scan_info info = { 1790 .aborted = true, 1791 }; 1792 1793 ieee80211_scan_completed(mvm->hw, &info); 1794 } 1795 1796 /* Sched scan will be restarted by mac80211 in 1797 * restart_hw, so do not report if FW is about to be 1798 * restarted. 1799 */ 1800 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1801 !mvm->fw_restart) { 1802 ieee80211_sched_scan_stopped(mvm->hw); 1803 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1804 } 1805 } 1806 } 1807 1808 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1809 { 1810 int ret; 1811 1812 if (!(mvm->scan_status & type)) 1813 return 0; 1814 1815 if (iwl_mvm_is_radio_killed(mvm)) { 1816 ret = 0; 1817 goto out; 1818 } 1819 1820 ret = iwl_mvm_scan_stop_wait(mvm, type); 1821 if (!ret) 1822 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 1823 out: 1824 /* Clear the scan status so the next scan requests will 1825 * succeed and mark the scan as stopping, so that the Rx 1826 * handler doesn't do anything, as the scan was stopped from 1827 * above. 1828 */ 1829 mvm->scan_status &= ~type; 1830 1831 if (type == IWL_MVM_SCAN_REGULAR) { 1832 /* Since the rx handler won't do anything now, we have 1833 * to release the scan reference here. 1834 */ 1835 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1836 cancel_delayed_work(&mvm->scan_timeout_dwork); 1837 if (notify) { 1838 struct cfg80211_scan_info info = { 1839 .aborted = true, 1840 }; 1841 1842 ieee80211_scan_completed(mvm->hw, &info); 1843 } 1844 } else if (notify) { 1845 ieee80211_sched_scan_stopped(mvm->hw); 1846 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1847 } 1848 1849 return ret; 1850 } 1851