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