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 static void 668 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 669 struct ieee80211_scan_ies *ies, 670 struct iwl_mvm_scan_params *params) 671 { 672 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 673 u8 *pos, *newpos; 674 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 675 params->mac_addr : NULL; 676 677 /* 678 * Unfortunately, right now the offload scan doesn't support randomising 679 * within the firmware, so until the firmware API is ready we implement 680 * it in the driver. This means that the scan iterations won't really be 681 * random, only when it's restarted, but at least that helps a bit. 682 */ 683 if (mac_addr) 684 get_random_mask_addr(frame->sa, mac_addr, 685 params->mac_addr_mask); 686 else 687 memcpy(frame->sa, vif->addr, ETH_ALEN); 688 689 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 690 eth_broadcast_addr(frame->da); 691 eth_broadcast_addr(frame->bssid); 692 frame->seq_ctrl = 0; 693 694 pos = frame->u.probe_req.variable; 695 *pos++ = WLAN_EID_SSID; 696 *pos++ = 0; 697 698 params->preq.mac_header.offset = 0; 699 params->preq.mac_header.len = cpu_to_le16(24 + 2); 700 701 /* Insert ds parameter set element on 2.4 GHz band */ 702 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 703 ies->ies[NL80211_BAND_2GHZ], 704 ies->len[NL80211_BAND_2GHZ], 705 pos); 706 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 707 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 708 pos = newpos; 709 710 memcpy(pos, ies->ies[NL80211_BAND_5GHZ], 711 ies->len[NL80211_BAND_5GHZ]); 712 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 713 params->preq.band_data[1].len = 714 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]); 715 pos += ies->len[NL80211_BAND_5GHZ]; 716 717 memcpy(pos, ies->common_ies, ies->common_ie_len); 718 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 719 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 720 } 721 722 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 723 struct iwl_scan_req_lmac *cmd, 724 struct iwl_mvm_scan_params *params) 725 { 726 cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE; 727 cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE; 728 cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 729 cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED; 730 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 731 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 732 cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 733 } 734 735 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 736 struct ieee80211_scan_ies *ies, 737 int n_channels) 738 { 739 return ((n_ssids <= PROBE_OPTION_MAX) && 740 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 741 (ies->common_ie_len + 742 ies->len[NL80211_BAND_2GHZ] + 743 ies->len[NL80211_BAND_5GHZ] <= 744 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 745 } 746 747 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 748 struct ieee80211_vif *vif) 749 { 750 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 751 752 /* We can only use EBS if: 753 * 1. the feature is supported; 754 * 2. the last EBS was successful; 755 * 3. if only single scan, the single scan EBS API is supported; 756 * 4. it's not a p2p find operation. 757 */ 758 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 759 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS && 760 vif->type != NL80211_IFTYPE_P2P_DEVICE); 761 } 762 763 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 764 { 765 return params->n_scan_plans == 1 && 766 params->scan_plans[0].iterations == 1; 767 } 768 769 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 770 struct iwl_mvm_scan_params *params, 771 struct ieee80211_vif *vif) 772 { 773 int flags = 0; 774 775 if (params->n_ssids == 0) 776 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 777 778 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 779 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 780 781 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 782 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 783 784 if (iwl_mvm_rrm_scan_needed(mvm)) 785 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 786 787 if (params->pass_all) 788 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 789 else 790 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 791 792 #ifdef CONFIG_IWLWIFI_DEBUGFS 793 if (mvm->scan_iter_notif_enabled) 794 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 795 #endif 796 797 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 798 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 799 800 if (iwl_mvm_is_regular_scan(params) && 801 vif->type != NL80211_IFTYPE_P2P_DEVICE && 802 params->type != IWL_SCAN_TYPE_FRAGMENTED) 803 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 804 805 return flags; 806 } 807 808 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 809 struct iwl_mvm_scan_params *params) 810 { 811 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 812 struct iwl_scan_probe_req *preq = 813 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 814 mvm->fw->ucode_capa.n_scan_channels); 815 u32 ssid_bitmap = 0; 816 int i; 817 818 lockdep_assert_held(&mvm->mutex); 819 820 memset(cmd, 0, ksize(cmd)); 821 822 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 823 return -EINVAL; 824 825 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 826 827 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 828 cmd->iter_num = cpu_to_le32(1); 829 cmd->n_channels = (u8)params->n_channels; 830 831 cmd->delay = cpu_to_le32(params->delay); 832 833 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 834 vif)); 835 836 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 837 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 838 MAC_FILTER_IN_BEACON); 839 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 840 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 841 842 /* this API uses bits 1-20 instead of 0-19 */ 843 ssid_bitmap <<= 1; 844 845 for (i = 0; i < params->n_scan_plans; i++) { 846 struct cfg80211_sched_scan_plan *scan_plan = 847 ¶ms->scan_plans[i]; 848 849 cmd->schedule[i].delay = 850 cpu_to_le16(scan_plan->interval); 851 cmd->schedule[i].iterations = scan_plan->iterations; 852 cmd->schedule[i].full_scan_mul = 1; 853 } 854 855 /* 856 * If the number of iterations of the last scan plan is set to 857 * zero, it should run infinitely. However, this is not always the case. 858 * For example, when regular scan is requested the driver sets one scan 859 * plan with one iteration. 860 */ 861 if (!cmd->schedule[i - 1].iterations) 862 cmd->schedule[i - 1].iterations = 0xff; 863 864 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 865 cmd->channel_opt[0].flags = 866 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 867 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 868 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 869 cmd->channel_opt[0].non_ebs_ratio = 870 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 871 cmd->channel_opt[1].flags = 872 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 873 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 874 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 875 cmd->channel_opt[1].non_ebs_ratio = 876 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 877 } 878 879 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 880 params->n_channels, ssid_bitmap, cmd); 881 882 *preq = params->preq; 883 884 return 0; 885 } 886 887 static int rate_to_scan_rate_flag(unsigned int rate) 888 { 889 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 890 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 891 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 892 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 893 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 894 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 895 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 896 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 897 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 898 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 899 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 900 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 901 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 902 }; 903 904 return rate_to_scan_rate[rate]; 905 } 906 907 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 908 { 909 struct ieee80211_supported_band *band; 910 unsigned int rates = 0; 911 int i; 912 913 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 914 for (i = 0; i < band->n_bitrates; i++) 915 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 916 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 917 for (i = 0; i < band->n_bitrates; i++) 918 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 919 920 /* Set both basic rates and supported rates */ 921 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 922 923 return cpu_to_le32(rates); 924 } 925 926 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm, 927 struct iwl_scan_dwell *dwell) 928 { 929 dwell->active = IWL_SCAN_DWELL_ACTIVE; 930 dwell->passive = IWL_SCAN_DWELL_PASSIVE; 931 dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED; 932 dwell->extended = IWL_SCAN_DWELL_EXTENDED; 933 } 934 935 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels) 936 { 937 struct ieee80211_supported_band *band; 938 int i, j = 0; 939 940 band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ]; 941 for (i = 0; i < band->n_channels; i++, j++) 942 channels[j] = band->channels[i].hw_value; 943 band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ]; 944 for (i = 0; i < band->n_channels; i++, j++) 945 channels[j] = band->channels[i].hw_value; 946 } 947 948 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config, 949 u32 flags, u8 channel_flags) 950 { 951 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 952 struct iwl_scan_config_v1 *cfg = config; 953 954 cfg->flags = cpu_to_le32(flags); 955 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 956 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 957 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 958 cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time); 959 cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 960 961 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 962 963 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 964 965 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 966 cfg->channel_flags = channel_flags; 967 968 iwl_mvm_fill_channels(mvm, cfg->channel_array); 969 } 970 971 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config, 972 u32 flags, u8 channel_flags) 973 { 974 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 975 struct iwl_scan_config *cfg = config; 976 977 cfg->flags = cpu_to_le32(flags); 978 cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 979 cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 980 cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm); 981 cfg->out_of_channel_time[0] = 982 cpu_to_le32(scan_timing[type].max_out_time); 983 cfg->suspend_time[0] = cpu_to_le32(scan_timing[type].suspend_time); 984 985 if (iwl_mvm_is_cdb_supported(mvm)) { 986 cfg->suspend_time[1] = 987 cpu_to_le32(scan_timing[type].suspend_time); 988 cfg->out_of_channel_time[1] = 989 cpu_to_le32(scan_timing[type].max_out_time); 990 } 991 992 iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell); 993 994 memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 995 996 cfg->bcast_sta_id = mvm->aux_sta.sta_id; 997 cfg->channel_flags = channel_flags; 998 999 iwl_mvm_fill_channels(mvm, cfg->channel_array); 1000 } 1001 1002 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 1003 { 1004 void *cfg; 1005 int ret, cmd_size; 1006 struct iwl_host_cmd cmd = { 1007 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 1008 }; 1009 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 1010 int num_channels = 1011 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels + 1012 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels; 1013 u32 flags; 1014 u8 channel_flags; 1015 1016 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 1017 return -ENOBUFS; 1018 1019 if (type == mvm->scan_type) 1020 return 0; 1021 1022 if (iwl_mvm_has_new_tx_api(mvm)) 1023 cmd_size = sizeof(struct iwl_scan_config); 1024 else 1025 cmd_size = sizeof(struct iwl_scan_config_v1); 1026 cmd_size += mvm->fw->ucode_capa.n_scan_channels; 1027 1028 cfg = kzalloc(cmd_size, GFP_KERNEL); 1029 if (!cfg) 1030 return -ENOMEM; 1031 1032 flags = SCAN_CONFIG_FLAG_ACTIVATE | 1033 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 1034 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 1035 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 1036 SCAN_CONFIG_FLAG_SET_AUX_STA_ID | 1037 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 1038 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 1039 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 1040 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS | 1041 SCAN_CONFIG_N_CHANNELS(num_channels) | 1042 (type == IWL_SCAN_TYPE_FRAGMENTED ? 1043 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 1044 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED); 1045 1046 channel_flags = IWL_CHANNEL_FLAG_EBS | 1047 IWL_CHANNEL_FLAG_ACCURATE_EBS | 1048 IWL_CHANNEL_FLAG_EBS_ADD | 1049 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 1050 1051 if (iwl_mvm_has_new_tx_api(mvm)) { 1052 flags |= (type == IWL_SCAN_TYPE_FRAGMENTED) ? 1053 SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED : 1054 SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED; 1055 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags); 1056 } else { 1057 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags); 1058 } 1059 1060 cmd.data[0] = cfg; 1061 cmd.len[0] = cmd_size; 1062 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1063 1064 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1065 1066 ret = iwl_mvm_send_cmd(mvm, &cmd); 1067 if (!ret) 1068 mvm->scan_type = type; 1069 1070 kfree(cfg); 1071 return ret; 1072 } 1073 1074 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1075 { 1076 int i; 1077 1078 for (i = 0; i < mvm->max_scans; i++) 1079 if (mvm->scan_uid_status[i] == status) 1080 return i; 1081 1082 return -ENOENT; 1083 } 1084 1085 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1086 struct iwl_scan_req_umac *cmd, 1087 struct iwl_mvm_scan_params *params) 1088 { 1089 struct iwl_mvm_scan_timing_params *timing = &scan_timing[params->type]; 1090 1091 if (iwl_mvm_is_regular_scan(params)) 1092 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1093 else 1094 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2); 1095 1096 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1097 if (params->measurement_dwell) { 1098 cmd->v7.active_dwell = params->measurement_dwell; 1099 cmd->v7.passive_dwell = params->measurement_dwell; 1100 } else { 1101 cmd->v7.active_dwell = IWL_SCAN_DWELL_ACTIVE; 1102 cmd->v7.passive_dwell = IWL_SCAN_DWELL_PASSIVE; 1103 } 1104 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1105 1106 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1107 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] = 1108 cpu_to_le32(timing->max_out_time); 1109 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] = 1110 cpu_to_le32(timing->suspend_time); 1111 if (iwl_mvm_is_cdb_supported(mvm)) { 1112 cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] = 1113 cpu_to_le32(timing->max_out_time); 1114 cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] = 1115 cpu_to_le32(timing->suspend_time); 1116 } 1117 1118 return; 1119 } 1120 1121 if (params->measurement_dwell) { 1122 cmd->v1.active_dwell = params->measurement_dwell; 1123 cmd->v1.passive_dwell = params->measurement_dwell; 1124 cmd->v1.extended_dwell = params->measurement_dwell; 1125 } else { 1126 cmd->v1.active_dwell = IWL_SCAN_DWELL_ACTIVE; 1127 cmd->v1.passive_dwell = IWL_SCAN_DWELL_PASSIVE; 1128 cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED; 1129 } 1130 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED; 1131 1132 if (iwl_mvm_has_new_tx_api(mvm)) { 1133 cmd->v6.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1134 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] = 1135 cpu_to_le32(timing->max_out_time); 1136 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] = 1137 cpu_to_le32(timing->suspend_time); 1138 if (iwl_mvm_is_cdb_supported(mvm)) { 1139 cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] = 1140 cpu_to_le32(timing->max_out_time); 1141 cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] = 1142 cpu_to_le32(timing->suspend_time); 1143 } 1144 } else { 1145 cmd->v1.max_out_time = cpu_to_le32(timing->max_out_time); 1146 cmd->v1.suspend_time = cpu_to_le32(timing->suspend_time); 1147 cmd->v1.scan_priority = 1148 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6); 1149 } 1150 } 1151 1152 static void 1153 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1154 struct ieee80211_channel **channels, 1155 int n_channels, u32 ssid_bitmap, 1156 struct iwl_scan_channel_cfg_umac *channel_cfg) 1157 { 1158 int i; 1159 1160 for (i = 0; i < n_channels; i++) { 1161 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1162 channel_cfg[i].channel_num = channels[i]->hw_value; 1163 channel_cfg[i].iter_count = 1; 1164 channel_cfg[i].iter_interval = 0; 1165 } 1166 } 1167 1168 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1169 struct iwl_mvm_scan_params *params, 1170 struct ieee80211_vif *vif) 1171 { 1172 u16 flags = 0; 1173 1174 if (params->n_ssids == 0) 1175 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1176 1177 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1178 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1179 1180 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) { 1181 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1182 if (iwl_mvm_is_cdb_supported(mvm)) 1183 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED; 1184 } 1185 1186 if (iwl_mvm_rrm_scan_needed(mvm)) 1187 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1188 1189 if (params->pass_all) 1190 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1191 else 1192 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1193 1194 if (!iwl_mvm_is_regular_scan(params)) 1195 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1196 1197 if (params->measurement_dwell) 1198 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1199 1200 #ifdef CONFIG_IWLWIFI_DEBUGFS 1201 if (mvm->scan_iter_notif_enabled) 1202 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1203 #endif 1204 1205 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1206 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1207 1208 if (iwl_mvm_is_regular_scan(params) && 1209 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1210 params->type != IWL_SCAN_TYPE_FRAGMENTED) 1211 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1212 1213 return flags; 1214 } 1215 1216 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1217 struct iwl_mvm_scan_params *params, 1218 int type) 1219 { 1220 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1221 void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm); 1222 struct iwl_scan_req_umac_tail *sec_part = cmd_data + 1223 sizeof(struct iwl_scan_channel_cfg_umac) * 1224 mvm->fw->ucode_capa.n_scan_channels; 1225 int uid, i; 1226 u32 ssid_bitmap = 0; 1227 u8 channel_flags = 0; 1228 struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif); 1229 1230 lockdep_assert_held(&mvm->mutex); 1231 1232 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1233 return -EINVAL; 1234 1235 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1236 if (uid < 0) 1237 return uid; 1238 1239 memset(cmd, 0, ksize(cmd)); 1240 1241 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1242 1243 mvm->scan_uid_status[uid] = type; 1244 1245 cmd->uid = cpu_to_le32(uid); 1246 cmd->general_flags = cpu_to_le16(iwl_mvm_scan_umac_flags(mvm, params, 1247 vif)); 1248 cmd->scan_start_mac_id = scan_vif->id; 1249 1250 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1251 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1252 1253 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1254 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1255 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1256 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1257 1258 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) { 1259 cmd->v7.channel_flags = channel_flags; 1260 cmd->v7.n_channels = params->n_channels; 1261 } else if (iwl_mvm_has_new_tx_api(mvm)) { 1262 cmd->v6.channel_flags = channel_flags; 1263 cmd->v6.n_channels = params->n_channels; 1264 } else { 1265 cmd->v1.channel_flags = channel_flags; 1266 cmd->v1.n_channels = params->n_channels; 1267 } 1268 1269 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1270 1271 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1272 params->n_channels, ssid_bitmap, 1273 cmd_data); 1274 1275 for (i = 0; i < params->n_scan_plans; i++) { 1276 struct cfg80211_sched_scan_plan *scan_plan = 1277 ¶ms->scan_plans[i]; 1278 1279 sec_part->schedule[i].iter_count = scan_plan->iterations; 1280 sec_part->schedule[i].interval = 1281 cpu_to_le16(scan_plan->interval); 1282 } 1283 1284 /* 1285 * If the number of iterations of the last scan plan is set to 1286 * zero, it should run infinitely. However, this is not always the case. 1287 * For example, when regular scan is requested the driver sets one scan 1288 * plan with one iteration. 1289 */ 1290 if (!sec_part->schedule[i - 1].iter_count) 1291 sec_part->schedule[i - 1].iter_count = 0xff; 1292 1293 sec_part->delay = cpu_to_le16(params->delay); 1294 sec_part->preq = params->preq; 1295 1296 return 0; 1297 } 1298 1299 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1300 { 1301 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1302 } 1303 1304 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1305 { 1306 bool unified_image = fw_has_capa(&mvm->fw->ucode_capa, 1307 IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG); 1308 1309 /* This looks a bit arbitrary, but the idea is that if we run 1310 * out of possible simultaneous scans and the userspace is 1311 * trying to run a scan type that is already running, we 1312 * return -EBUSY. But if the userspace wants to start a 1313 * different type of scan, we stop the opposite type to make 1314 * space for the new request. The reason is backwards 1315 * compatibility with old wpa_supplicant that wouldn't stop a 1316 * scheduled scan before starting a normal scan. 1317 */ 1318 1319 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1320 return 0; 1321 1322 /* Use a switch, even though this is a bitmask, so that more 1323 * than one bits set will fall in default and we will warn. 1324 */ 1325 switch (type) { 1326 case IWL_MVM_SCAN_REGULAR: 1327 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1328 return -EBUSY; 1329 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1330 case IWL_MVM_SCAN_SCHED: 1331 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1332 return -EBUSY; 1333 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1334 case IWL_MVM_SCAN_NETDETECT: 1335 /* For non-unified images, there's no need to stop 1336 * anything for net-detect since the firmware is 1337 * restarted anyway. This way, any sched scans that 1338 * were running will be restarted when we resume. 1339 */ 1340 if (!unified_image) 1341 return 0; 1342 1343 /* If this is a unified image and we ran out of scans, 1344 * we need to stop something. Prefer stopping regular 1345 * scans, because the results are useless at this 1346 * point, and we should be able to keep running 1347 * another scheduled scan while suspended. 1348 */ 1349 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1350 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, 1351 true); 1352 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1353 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, 1354 true); 1355 1356 /* fall through, something is wrong if no scan was 1357 * running but we ran out of scans. 1358 */ 1359 default: 1360 WARN_ON(1); 1361 break; 1362 } 1363 1364 return -EIO; 1365 } 1366 1367 #define SCAN_TIMEOUT 20000 1368 1369 void iwl_mvm_scan_timeout_wk(struct work_struct *work) 1370 { 1371 struct delayed_work *delayed_work = to_delayed_work(work); 1372 struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm, 1373 scan_timeout_dwork); 1374 1375 IWL_ERR(mvm, "regular scan timed out\n"); 1376 1377 iwl_force_nmi(mvm->trans); 1378 } 1379 1380 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1381 struct cfg80211_scan_request *req, 1382 struct ieee80211_scan_ies *ies) 1383 { 1384 struct iwl_host_cmd hcmd = { 1385 .len = { iwl_mvm_scan_size(mvm), }, 1386 .data = { mvm->scan_cmd, }, 1387 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1388 }; 1389 struct iwl_mvm_scan_params params = {}; 1390 int ret; 1391 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1392 1393 lockdep_assert_held(&mvm->mutex); 1394 1395 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1396 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1397 return -EBUSY; 1398 } 1399 1400 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1401 if (ret) 1402 return ret; 1403 1404 /* we should have failed registration if scan_cmd was NULL */ 1405 if (WARN_ON(!mvm->scan_cmd)) 1406 return -ENOMEM; 1407 1408 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1409 return -ENOBUFS; 1410 1411 params.n_ssids = req->n_ssids; 1412 params.flags = req->flags; 1413 params.n_channels = req->n_channels; 1414 params.delay = 0; 1415 params.ssids = req->ssids; 1416 params.channels = req->channels; 1417 params.mac_addr = req->mac_addr; 1418 params.mac_addr_mask = req->mac_addr_mask; 1419 params.no_cck = req->no_cck; 1420 params.pass_all = true; 1421 params.n_match_sets = 0; 1422 params.match_sets = NULL; 1423 1424 params.scan_plans = &scan_plan; 1425 params.n_scan_plans = 1; 1426 1427 params.type = 1428 iwl_mvm_get_scan_type(mvm, 1429 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1430 1431 ret = iwl_mvm_get_measurement_dwell(mvm, req, ¶ms); 1432 if (ret < 0) 1433 return ret; 1434 1435 params.measurement_dwell = ret; 1436 1437 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1438 1439 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1440 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1441 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1442 IWL_MVM_SCAN_REGULAR); 1443 } else { 1444 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1445 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1446 } 1447 1448 if (ret) 1449 return ret; 1450 1451 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1452 if (ret) { 1453 /* If the scan failed, it usually means that the FW was unable 1454 * to allocate the time events. Warn on it, but maybe we 1455 * should try to send the command again with different params. 1456 */ 1457 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1458 return ret; 1459 } 1460 1461 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1462 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1463 mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif); 1464 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1465 1466 schedule_delayed_work(&mvm->scan_timeout_dwork, 1467 msecs_to_jiffies(SCAN_TIMEOUT)); 1468 1469 return 0; 1470 } 1471 1472 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1473 struct ieee80211_vif *vif, 1474 struct cfg80211_sched_scan_request *req, 1475 struct ieee80211_scan_ies *ies, 1476 int type) 1477 { 1478 struct iwl_host_cmd hcmd = { 1479 .len = { iwl_mvm_scan_size(mvm), }, 1480 .data = { mvm->scan_cmd, }, 1481 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1482 }; 1483 struct iwl_mvm_scan_params params = {}; 1484 int ret; 1485 1486 lockdep_assert_held(&mvm->mutex); 1487 1488 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1489 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1490 return -EBUSY; 1491 } 1492 1493 ret = iwl_mvm_check_running_scans(mvm, type); 1494 if (ret) 1495 return ret; 1496 1497 /* we should have failed registration if scan_cmd was NULL */ 1498 if (WARN_ON(!mvm->scan_cmd)) 1499 return -ENOMEM; 1500 1501 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1502 return -ENOBUFS; 1503 1504 params.n_ssids = req->n_ssids; 1505 params.flags = req->flags; 1506 params.n_channels = req->n_channels; 1507 params.ssids = req->ssids; 1508 params.channels = req->channels; 1509 params.mac_addr = req->mac_addr; 1510 params.mac_addr_mask = req->mac_addr_mask; 1511 params.no_cck = false; 1512 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1513 params.n_match_sets = req->n_match_sets; 1514 params.match_sets = req->match_sets; 1515 if (!req->n_scan_plans) 1516 return -EINVAL; 1517 1518 params.n_scan_plans = req->n_scan_plans; 1519 params.scan_plans = req->scan_plans; 1520 1521 params.type = 1522 iwl_mvm_get_scan_type(mvm, 1523 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1524 1525 /* In theory, LMAC scans can handle a 32-bit delay, but since 1526 * waiting for over 18 hours to start the scan is a bit silly 1527 * and to keep it aligned with UMAC scans (which only support 1528 * 16-bit delays), trim it down to 16-bits. 1529 */ 1530 if (req->delay > U16_MAX) { 1531 IWL_DEBUG_SCAN(mvm, 1532 "delay value is > 16-bits, set to max possible\n"); 1533 params.delay = U16_MAX; 1534 } else { 1535 params.delay = req->delay; 1536 } 1537 1538 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1539 if (ret) 1540 return ret; 1541 1542 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1543 1544 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1545 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1546 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1547 } else { 1548 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1549 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1550 } 1551 1552 if (ret) 1553 return ret; 1554 1555 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1556 if (!ret) { 1557 IWL_DEBUG_SCAN(mvm, 1558 "Sched scan request was sent successfully\n"); 1559 mvm->scan_status |= type; 1560 } else { 1561 /* If the scan failed, it usually means that the FW was unable 1562 * to allocate the time events. Warn on it, but maybe we 1563 * should try to send the command again with different params. 1564 */ 1565 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1566 } 1567 1568 return ret; 1569 } 1570 1571 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1572 struct iwl_rx_cmd_buffer *rxb) 1573 { 1574 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1575 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1576 u32 uid = __le32_to_cpu(notif->uid); 1577 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1578 1579 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1580 return; 1581 1582 /* if the scan is already stopping, we don't need to notify mac80211 */ 1583 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1584 struct cfg80211_scan_info info = { 1585 .aborted = aborted, 1586 .scan_start_tsf = mvm->scan_start, 1587 }; 1588 1589 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN); 1590 ieee80211_scan_completed(mvm->hw, &info); 1591 mvm->scan_vif = NULL; 1592 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1593 cancel_delayed_work(&mvm->scan_timeout_dwork); 1594 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1595 ieee80211_sched_scan_stopped(mvm->hw); 1596 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1597 } 1598 1599 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1600 IWL_DEBUG_SCAN(mvm, 1601 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1602 uid, mvm->scan_uid_status[uid], 1603 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1604 "completed" : "aborted", 1605 iwl_mvm_ebs_status_str(notif->ebs_status)); 1606 IWL_DEBUG_SCAN(mvm, 1607 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1608 notif->last_schedule, notif->last_iter, 1609 __le32_to_cpu(notif->time_from_last_iter)); 1610 1611 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1612 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1613 mvm->last_ebs_successful = false; 1614 1615 mvm->scan_uid_status[uid] = 0; 1616 } 1617 1618 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1619 struct iwl_rx_cmd_buffer *rxb) 1620 { 1621 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1622 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1623 1624 mvm->scan_start = le64_to_cpu(notif->start_tsf); 1625 1626 IWL_DEBUG_SCAN(mvm, 1627 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n", 1628 notif->status, notif->scanned_channels); 1629 1630 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1631 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1632 ieee80211_sched_scan_results(mvm->hw); 1633 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1634 } 1635 1636 IWL_DEBUG_SCAN(mvm, 1637 "UMAC Scan iteration complete: scan started at %llu (TSF)\n", 1638 mvm->scan_start); 1639 } 1640 1641 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1642 { 1643 struct iwl_umac_scan_abort cmd = {}; 1644 int uid, ret; 1645 1646 lockdep_assert_held(&mvm->mutex); 1647 1648 /* We should always get a valid index here, because we already 1649 * checked that this type of scan was running in the generic 1650 * code. 1651 */ 1652 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1653 if (WARN_ON_ONCE(uid < 0)) 1654 return uid; 1655 1656 cmd.uid = cpu_to_le32(uid); 1657 1658 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1659 1660 ret = iwl_mvm_send_cmd_pdu(mvm, 1661 iwl_cmd_id(SCAN_ABORT_UMAC, 1662 IWL_ALWAYS_LONG_GROUP, 0), 1663 0, sizeof(cmd), &cmd); 1664 if (!ret) 1665 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1666 1667 return ret; 1668 } 1669 1670 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1671 { 1672 struct iwl_notification_wait wait_scan_done; 1673 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1674 SCAN_OFFLOAD_COMPLETE, }; 1675 int ret; 1676 1677 lockdep_assert_held(&mvm->mutex); 1678 1679 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1680 scan_done_notif, 1681 ARRAY_SIZE(scan_done_notif), 1682 NULL, NULL); 1683 1684 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1685 1686 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1687 ret = iwl_mvm_umac_scan_abort(mvm, type); 1688 else 1689 ret = iwl_mvm_lmac_scan_abort(mvm); 1690 1691 if (ret) { 1692 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1693 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1694 return ret; 1695 } 1696 1697 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1698 1699 return ret; 1700 } 1701 1702 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1703 { 1704 int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1; 1705 1706 if (iwl_mvm_is_adaptive_dwell_supported(mvm)) 1707 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7; 1708 else if (iwl_mvm_has_new_tx_api(mvm)) 1709 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6; 1710 1711 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1712 return base_size + 1713 sizeof(struct iwl_scan_channel_cfg_umac) * 1714 mvm->fw->ucode_capa.n_scan_channels + 1715 sizeof(struct iwl_scan_req_umac_tail); 1716 1717 return sizeof(struct iwl_scan_req_lmac) + 1718 sizeof(struct iwl_scan_channel_cfg_lmac) * 1719 mvm->fw->ucode_capa.n_scan_channels + 1720 sizeof(struct iwl_scan_probe_req); 1721 } 1722 1723 /* 1724 * This function is used in nic restart flow, to inform mac80211 about scans 1725 * that was aborted by restart flow or by an assert. 1726 */ 1727 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1728 { 1729 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1730 int uid, i; 1731 1732 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1733 if (uid >= 0) { 1734 struct cfg80211_scan_info info = { 1735 .aborted = true, 1736 }; 1737 1738 ieee80211_scan_completed(mvm->hw, &info); 1739 mvm->scan_uid_status[uid] = 0; 1740 } 1741 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1742 if (uid >= 0 && !mvm->fw_restart) { 1743 ieee80211_sched_scan_stopped(mvm->hw); 1744 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1745 mvm->scan_uid_status[uid] = 0; 1746 } 1747 1748 /* We shouldn't have any UIDs still set. Loop over all the 1749 * UIDs to make sure there's nothing left there and warn if 1750 * any is found. 1751 */ 1752 for (i = 0; i < mvm->max_scans; i++) { 1753 if (WARN_ONCE(mvm->scan_uid_status[i], 1754 "UMAC scan UID %d status was not cleaned\n", 1755 i)) 1756 mvm->scan_uid_status[i] = 0; 1757 } 1758 } else { 1759 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 1760 struct cfg80211_scan_info info = { 1761 .aborted = true, 1762 }; 1763 1764 ieee80211_scan_completed(mvm->hw, &info); 1765 } 1766 1767 /* Sched scan will be restarted by mac80211 in 1768 * restart_hw, so do not report if FW is about to be 1769 * restarted. 1770 */ 1771 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1772 !mvm->fw_restart) { 1773 ieee80211_sched_scan_stopped(mvm->hw); 1774 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1775 } 1776 } 1777 } 1778 1779 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1780 { 1781 int ret; 1782 1783 if (!(mvm->scan_status & type)) 1784 return 0; 1785 1786 if (iwl_mvm_is_radio_killed(mvm)) { 1787 ret = 0; 1788 goto out; 1789 } 1790 1791 ret = iwl_mvm_scan_stop_wait(mvm, type); 1792 if (!ret) 1793 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 1794 out: 1795 /* Clear the scan status so the next scan requests will 1796 * succeed and mark the scan as stopping, so that the Rx 1797 * handler doesn't do anything, as the scan was stopped from 1798 * above. 1799 */ 1800 mvm->scan_status &= ~type; 1801 1802 if (type == IWL_MVM_SCAN_REGULAR) { 1803 /* Since the rx handler won't do anything now, we have 1804 * to release the scan reference here. 1805 */ 1806 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1807 cancel_delayed_work(&mvm->scan_timeout_dwork); 1808 if (notify) { 1809 struct cfg80211_scan_info info = { 1810 .aborted = true, 1811 }; 1812 1813 ieee80211_scan_completed(mvm->hw, &info); 1814 } 1815 } else if (notify) { 1816 ieee80211_sched_scan_stopped(mvm->hw); 1817 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1818 } 1819 1820 return ret; 1821 } 1822