drivers/net/wireless/intel/iwlwifi/mvm/scan.c

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  10  * Copyright(c) 2016 Intel Deutschland GmbH
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  37  * Copyright(c) 2016 Intel Deutschland GmbH
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  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 struct iwl_mvm_scan_timing_params {
  85         u32 dwell_active;
  86         u32 dwell_passive;
  87         u32 dwell_fragmented;
  88         u32 dwell_extended;
  89         u32 suspend_time;
  90         u32 max_out_time;
  91 };
  92
  93 static struct iwl_mvm_scan_timing_params scan_timing[] = {
  94         [IWL_SCAN_TYPE_UNASSOC] = {
  95                 .dwell_active = 10,
  96                 .dwell_passive = 110,
  97                 .dwell_fragmented = 44,
  98                 .dwell_extended = 90,
  99                 .suspend_time = 0,
 100                 .max_out_time = 0,
 101         },
 102         [IWL_SCAN_TYPE_WILD] = {
 103                 .dwell_active = 10,
 104                 .dwell_passive = 110,
 105                 .dwell_fragmented = 44,
 106                 .dwell_extended = 90,
 107                 .suspend_time = 30,
 108                 .max_out_time = 120,
 109         },
 110         [IWL_SCAN_TYPE_MILD] = {
 111                 .dwell_active = 10,
 112                 .dwell_passive = 110,
 113                 .dwell_fragmented = 44,
 114                 .dwell_extended = 90,
 115                 .suspend_time = 120,
 116                 .max_out_time = 120,
 117         },
 118         [IWL_SCAN_TYPE_FRAGMENTED] = {
 119                 .dwell_active = 10,
 120                 .dwell_passive = 110,
 121                 .dwell_fragmented = 44,
 122                 .suspend_time = 95,
 123                 .max_out_time = 44,
 124         },
 125 };
 126
 127 struct iwl_mvm_scan_params {
 128         enum iwl_mvm_scan_type type;
 129         u32 n_channels;
 130         u16 delay;
 131         int n_ssids;
 132         struct cfg80211_ssid *ssids;
 133         struct ieee80211_channel **channels;
 134         u32 flags;
 135         u8 *mac_addr;
 136         u8 *mac_addr_mask;
 137         bool no_cck;
 138         bool pass_all;
 139         int n_match_sets;
 140         struct iwl_scan_probe_req preq;
 141         struct cfg80211_match_set *match_sets;
 142         int n_scan_plans;
 143         struct cfg80211_sched_scan_plan *scan_plans;
 144         u32 measurement_dwell;
 145 };
 146
 147 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
 148 {
 149         if (mvm->scan_rx_ant != ANT_NONE)
 150                 return mvm->scan_rx_ant;
 151         return iwl_mvm_get_valid_rx_ant(mvm);
 152 }
 153
 154 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 155 {
 156         u16 rx_chain;
 157         u8 rx_ant;
 158
 159         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 160         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 161         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 162         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 163         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 164         return cpu_to_le16(rx_chain);
 165 }
 166
 167 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band)
 168 {
 169         if (band == NL80211_BAND_2GHZ)
 170                 return cpu_to_le32(PHY_BAND_24);
 171         else
 172                 return cpu_to_le32(PHY_BAND_5);
 173 }
 174
 175 static inline __le32
 176 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
 177                           bool no_cck)
 178 {
 179         u32 tx_ant;
 180
 181         mvm->scan_last_antenna_idx =
 182                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 183                                      mvm->scan_last_antenna_idx);
 184         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 185
 186         if (band == NL80211_BAND_2GHZ && !no_cck)
 187                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 188                                    tx_ant);
 189         else
 190                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 191 }
 192
 193 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 194                                             struct ieee80211_vif *vif)
 195 {
 196         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 197         int *global_cnt = data;
 198
 199         if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 200             mvmvif->phy_ctxt->id < MAX_PHYS)
 201                 *global_cnt += 1;
 202 }
 203
 204 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
 205 {
 206         return IWL_MVM_TRAFFIC_LOW;
 207 }
 208
 209 static enum
 210 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
 211 {
 212         int global_cnt = 0;
 213         enum iwl_mvm_traffic_load load;
 214         bool low_latency;
 215
 216         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 217                                             IEEE80211_IFACE_ITER_NORMAL,
 218                                             iwl_mvm_scan_condition_iterator,
 219                                             &global_cnt);
 220         if (!global_cnt)
 221                 return IWL_SCAN_TYPE_UNASSOC;
 222
 223         load = iwl_mvm_get_traffic_load(mvm);
 224         low_latency = iwl_mvm_low_latency(mvm);
 225
 226         if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
 227             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
 228                 return IWL_SCAN_TYPE_FRAGMENTED;
 229
 230         if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
 231                 return IWL_SCAN_TYPE_MILD;
 232
 233         return IWL_SCAN_TYPE_WILD;
 234 }
 235
 236 static int
 237 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm,
 238                               struct cfg80211_scan_request *req,
 239                               struct iwl_mvm_scan_params *params)
 240 {
 241         if (!req->duration)
 242                 return 0;
 243
 244         if (req->duration_mandatory &&
 245             req->duration > scan_timing[params->type].max_out_time) {
 246                 IWL_DEBUG_SCAN(mvm,
 247                                "Measurement scan - too long dwell %hu (max out time %u)\n",
 248                                req->duration,
 249                                scan_timing[params->type].max_out_time);
 250                 return -EOPNOTSUPP;
 251         }
 252
 253         return min_t(u32, (u32)req->duration,
 254                      scan_timing[params->type].max_out_time);
 255 }
 256
 257 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 258 {
 259         /* require rrm scan whenever the fw supports it */
 260         return fw_has_capa(&mvm->fw->ucode_capa,
 261                            IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
 262 }
 263
 264 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
 265 {
 266         int max_probe_len;
 267
 268         max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 269
 270         /* we create the 802.11 header and SSID element */
 271         max_probe_len -= 24 + 2;
 272
 273         /* DS parameter set element is added on 2.4GHZ band if required */
 274         if (iwl_mvm_rrm_scan_needed(mvm))
 275                 max_probe_len -= 3;
 276
 277         return max_probe_len;
 278 }
 279
 280 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 281 {
 282         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
 283
 284         /* TODO: [BUG] This function should return the maximum allowed size of
 285          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 286          * in the same command. So the correct implementation of this function
 287          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 288          * command has only 512 bytes and it would leave us with about 240
 289          * bytes for scan IEs, which is clearly not enough. So meanwhile
 290          * we will report an incorrect value. This may result in a failure to
 291          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 292          * functions with -ENOBUFS, if a large enough probe will be provided.
 293          */
 294         return max_ie_len;
 295 }
 296
 297 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
 298                                      int num_res, u8 *buf, size_t buf_size)
 299 {
 300         int i;
 301         u8 *pos = buf, *end = buf + buf_size;
 302
 303         for (i = 0; pos < end && i < num_res; i++)
 304                 pos += snprintf(pos, end - pos, " %u", res[i].channel);
 305
 306         /* terminate the string in case the buffer was too short */
 307         *(buf + buf_size - 1) = '\0';
 308
 309         return buf;
 310 }
 311
 312 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 313                                               struct iwl_rx_cmd_buffer *rxb)
 314 {
 315         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 316         struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
 317         u8 buf[256];
 318
 319         IWL_DEBUG_SCAN(mvm,
 320                        "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
 321                        notif->status, notif->scanned_channels,
 322                        iwl_mvm_dump_channel_list(notif->results,
 323                                                  notif->scanned_channels, buf,
 324                                                  sizeof(buf)));
 325
 326         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
 327                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
 328                 ieee80211_sched_scan_results(mvm->hw);
 329                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 330         }
 331 }
 332
 333 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
 334                                  struct iwl_rx_cmd_buffer *rxb)
 335 {
 336         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 337         ieee80211_sched_scan_results(mvm->hw);
 338 }
 339
 340 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
 341 {
 342         switch (status) {
 343         case IWL_SCAN_EBS_SUCCESS:
 344                 return "successful";
 345         case IWL_SCAN_EBS_INACTIVE:
 346                 return "inactive";
 347         case IWL_SCAN_EBS_FAILED:
 348         case IWL_SCAN_EBS_CHAN_NOT_FOUND:
 349         default:
 350                 return "failed";
 351         }
 352 }
 353
 354 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
 355                                          struct iwl_rx_cmd_buffer *rxb)
 356 {
 357         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 358         struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
 359         bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 360
 361         /* If this happens, the firmware has mistakenly sent an LMAC
 362          * notification during UMAC scans -- warn and ignore it.
 363          */
 364         if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
 365                                      IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
 366                 return;
 367
 368         /* scan status must be locked for proper checking */
 369         lockdep_assert_held(&mvm->mutex);
 370
 371         /* We first check if we were stopping a scan, in which case we
 372          * just clear the stopping flag.  Then we check if it was a
 373          * firmware initiated stop, in which case we need to inform
 374          * mac80211.
 375          * Note that we can have a stopping and a running scan
 376          * simultaneously, but we can't have two different types of
 377          * scans stopping or running at the same time (since LMAC
 378          * doesn't support it).
 379          */
 380
 381         if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
 382                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
 383
 384                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 385                                aborted ? "aborted" : "completed",
 386                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 387                 IWL_DEBUG_SCAN(mvm,
 388                                "Last line %d, Last iteration %d, Time after last iteration %d\n",
 389                                scan_notif->last_schedule_line,
 390                                scan_notif->last_schedule_iteration,
 391                                __le32_to_cpu(scan_notif->time_after_last_iter));
 392
 393                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
 394         } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
 395                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
 396                                aborted ? "aborted" : "completed",
 397                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 398
 399                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
 400         } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
 401                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
 402
 403                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 404                                aborted ? "aborted" : "completed",
 405                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 406                 IWL_DEBUG_SCAN(mvm,
 407                                "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
 408                                scan_notif->last_schedule_line,
 409                                scan_notif->last_schedule_iteration,
 410                                __le32_to_cpu(scan_notif->time_after_last_iter));
 411
 412                 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
 413                 ieee80211_sched_scan_stopped(mvm->hw);
 414                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 415         } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
 416                 struct cfg80211_scan_info info = {
 417                         .aborted = aborted,
 418                 };
 419
 420                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
 421                                aborted ? "aborted" : "completed",
 422                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 423
 424                 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
 425                 ieee80211_scan_completed(mvm->hw, &info);
 426                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 427                 cancel_delayed_work(&mvm->scan_timeout_dwork);
 428         } else {
 429                 IWL_ERR(mvm,
 430                         "got scan complete notification but no scan is running\n");
 431         }
 432
 433         mvm->last_ebs_successful =
 434                         scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
 435                         scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
 436 }
 437
 438 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 439 {
 440         int i;
 441
 442         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 443                 if (!ssid_list[i].len)
 444                         break;
 445                 if (ssid_list[i].len == ssid_len &&
 446                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 447                         return i;
 448         }
 449         return -1;
 450 }
 451
 452 /* We insert the SSIDs in an inverted order, because the FW will
 453  * invert it back.
 454  */
 455 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
 456                                  struct iwl_ssid_ie *ssids,
 457                                  u32 *ssid_bitmap)
 458 {
 459         int i, j;
 460         int index;
 461
 462         /*
 463          * copy SSIDs from match list.
 464          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 465          * config match list.
 466          */
 467         for (i = 0, j = params->n_match_sets - 1;
 468              j >= 0 && i < PROBE_OPTION_MAX;
 469              i++, j--) {
 470                 /* skip empty SSID matchsets */
 471                 if (!params->match_sets[j].ssid.ssid_len)
 472                         continue;
 473                 ssids[i].id = WLAN_EID_SSID;
 474                 ssids[i].len = params->match_sets[j].ssid.ssid_len;
 475                 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
 476                        ssids[i].len);
 477         }
 478
 479         /* add SSIDs from scan SSID list */
 480         *ssid_bitmap = 0;
 481         for (j = params->n_ssids - 1;
 482              j >= 0 && i < PROBE_OPTION_MAX;
 483              i++, j--) {
 484                 index = iwl_ssid_exist(params->ssids[j].ssid,
 485                                        params->ssids[j].ssid_len,
 486                                        ssids);
 487                 if (index < 0) {
 488                         ssids[i].id = WLAN_EID_SSID;
 489                         ssids[i].len = params->ssids[j].ssid_len;
 490                         memcpy(ssids[i].ssid, params->ssids[j].ssid,
 491                                ssids[i].len);
 492                         *ssid_bitmap |= BIT(i);
 493                 } else {
 494                         *ssid_bitmap |= BIT(index);
 495                 }
 496         }
 497 }
 498
 499 static int
 500 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 501                                    struct cfg80211_sched_scan_request *req)
 502 {
 503         struct iwl_scan_offload_profile *profile;
 504         struct iwl_scan_offload_profile_cfg *profile_cfg;
 505         struct iwl_scan_offload_blacklist *blacklist;
 506         struct iwl_host_cmd cmd = {
 507                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 508                 .len[1] = sizeof(*profile_cfg),
 509                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 510                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 511         };
 512         int blacklist_len;
 513         int i;
 514         int ret;
 515
 516         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 517                 return -EIO;
 518
 519         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 520                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 521         else
 522                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 523
 524         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 525         if (!blacklist)
 526                 return -ENOMEM;
 527
 528         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 529         if (!profile_cfg) {
 530                 ret = -ENOMEM;
 531                 goto free_blacklist;
 532         }
 533
 534         cmd.data[0] = blacklist;
 535         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 536         cmd.data[1] = profile_cfg;
 537
 538         /* No blacklist configuration */
 539
 540         profile_cfg->num_profiles = req->n_match_sets;
 541         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 542         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 543         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 544         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 545                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 546
 547         for (i = 0; i < req->n_match_sets; i++) {
 548                 profile = &profile_cfg->profiles[i];
 549                 profile->ssid_index = i;
 550                 /* Support any cipher and auth algorithm */
 551                 profile->unicast_cipher = 0xff;
 552                 profile->auth_alg = 0xff;
 553                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 554                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 555                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 556         }
 557
 558         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 559
 560         ret = iwl_mvm_send_cmd(mvm, &cmd);
 561         kfree(profile_cfg);
 562 free_blacklist:
 563         kfree(blacklist);
 564
 565         return ret;
 566 }
 567
 568 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
 569                                   struct cfg80211_sched_scan_request *req)
 570 {
 571         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 572                 IWL_DEBUG_SCAN(mvm,
 573                                "Sending scheduled scan with filtering, n_match_sets %d\n",
 574                                req->n_match_sets);
 575                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 576                 return false;
 577         }
 578
 579         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
 580
 581         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 582         return true;
 583 }
 584
 585 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
 586 {
 587         int ret;
 588         struct iwl_host_cmd cmd = {
 589                 .id = SCAN_OFFLOAD_ABORT_CMD,
 590         };
 591         u32 status;
 592
 593         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
 594         if (ret)
 595                 return ret;
 596
 597         if (status != CAN_ABORT_STATUS) {
 598                 /*
 599                  * The scan abort will return 1 for success or
 600                  * 2 for "failure".  A failure condition can be
 601                  * due to simply not being in an active scan which
 602                  * can occur if we send the scan abort before the
 603                  * microcode has notified us that a scan is completed.
 604                  */
 605                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
 606                 ret = -ENOENT;
 607         }
 608
 609         return ret;
 610 }
 611
 612 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
 613                                      struct iwl_scan_req_tx_cmd *tx_cmd,
 614                                      bool no_cck)
 615 {
 616         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 617                                          TX_CMD_FLG_BT_DIS);
 618         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 619                                                            NL80211_BAND_2GHZ,
 620                                                            no_cck);
 621         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
 622
 623         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 624                                          TX_CMD_FLG_BT_DIS);
 625         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 626                                                            NL80211_BAND_5GHZ,
 627                                                            no_cck);
 628         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
 629 }
 630
 631 static void
 632 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
 633                                struct ieee80211_channel **channels,
 634                                int n_channels, u32 ssid_bitmap,
 635                                struct iwl_scan_req_lmac *cmd)
 636 {
 637         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
 638         int i;
 639
 640         for (i = 0; i < n_channels; i++) {
 641                 channel_cfg[i].channel_num =
 642                         cpu_to_le16(channels[i]->hw_value);
 643                 channel_cfg[i].iter_count = cpu_to_le16(1);
 644                 channel_cfg[i].iter_interval = 0;
 645                 channel_cfg[i].flags =
 646                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
 647                                     ssid_bitmap);
 648         }
 649 }
 650
 651 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 652                                            size_t len, u8 *const pos)
 653 {
 654         static const u8 before_ds_params[] = {
 655                         WLAN_EID_SSID,
 656                         WLAN_EID_SUPP_RATES,
 657                         WLAN_EID_REQUEST,
 658                         WLAN_EID_EXT_SUPP_RATES,
 659         };
 660         size_t offs;
 661         u8 *newpos = pos;
 662
 663         if (!iwl_mvm_rrm_scan_needed(mvm)) {
 664                 memcpy(newpos, ies, len);
 665                 return newpos + len;
 666         }
 667
 668         offs = ieee80211_ie_split(ies, len,
 669                                   before_ds_params,
 670                                   ARRAY_SIZE(before_ds_params),
 671                                   0);
 672
 673         memcpy(newpos, ies, offs);
 674         newpos += offs;
 675
 676         /* Add a placeholder for DS Parameter Set element */
 677         *newpos++ = WLAN_EID_DS_PARAMS;
 678         *newpos++ = 1;
 679         *newpos++ = 0;
 680
 681         memcpy(newpos, ies + offs, len - offs);
 682         newpos += len - offs;
 683
 684         return newpos;
 685 }
 686
 687 static void
 688 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 689                          struct ieee80211_scan_ies *ies,
 690                          struct iwl_mvm_scan_params *params)
 691 {
 692         struct ieee80211_mgmt *frame = (void *)params->preq.buf;
 693         u8 *pos, *newpos;
 694         const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
 695                 params->mac_addr : NULL;
 696
 697         /*
 698          * Unfortunately, right now the offload scan doesn't support randomising
 699          * within the firmware, so until the firmware API is ready we implement
 700          * it in the driver. This means that the scan iterations won't really be
 701          * random, only when it's restarted, but at least that helps a bit.
 702          */
 703         if (mac_addr)
 704                 get_random_mask_addr(frame->sa, mac_addr,
 705                                      params->mac_addr_mask);
 706         else
 707                 memcpy(frame->sa, vif->addr, ETH_ALEN);
 708
 709         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 710         eth_broadcast_addr(frame->da);
 711         eth_broadcast_addr(frame->bssid);
 712         frame->seq_ctrl = 0;
 713
 714         pos = frame->u.probe_req.variable;
 715         *pos++ = WLAN_EID_SSID;
 716         *pos++ = 0;
 717
 718         params->preq.mac_header.offset = 0;
 719         params->preq.mac_header.len = cpu_to_le16(24 + 2);
 720
 721         /* Insert ds parameter set element on 2.4 GHz band */
 722         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
 723                                                  ies->ies[NL80211_BAND_2GHZ],
 724                                                  ies->len[NL80211_BAND_2GHZ],
 725                                                  pos);
 726         params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
 727         params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
 728         pos = newpos;
 729
 730         memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
 731                ies->len[NL80211_BAND_5GHZ]);
 732         params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
 733         params->preq.band_data[1].len =
 734                 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
 735         pos += ies->len[NL80211_BAND_5GHZ];
 736
 737         memcpy(pos, ies->common_ies, ies->common_ie_len);
 738         params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
 739         params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
 740 }
 741
 742 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
 743                                     struct iwl_scan_req_lmac *cmd,
 744                                     struct iwl_mvm_scan_params *params)
 745 {
 746         cmd->active_dwell = scan_timing[params->type].dwell_active;
 747         cmd->passive_dwell = scan_timing[params->type].dwell_passive;
 748         cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
 749         cmd->extended_dwell = scan_timing[params->type].dwell_extended;
 750         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
 751         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
 752         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
 753 }
 754
 755 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
 756                                      struct ieee80211_scan_ies *ies,
 757                                      int n_channels)
 758 {
 759         return ((n_ssids <= PROBE_OPTION_MAX) &&
 760                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
 761                 (ies->common_ie_len +
 762                  ies->len[NL80211_BAND_2GHZ] +
 763                  ies->len[NL80211_BAND_5GHZ] <=
 764                  iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
 765 }
 766
 767 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 768                                         struct ieee80211_vif *vif)
 769 {
 770         const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
 771
 772         /* We can only use EBS if:
 773          *      1. the feature is supported;
 774          *      2. the last EBS was successful;
 775          *      3. if only single scan, the single scan EBS API is supported;
 776          *      4. it's not a p2p find operation.
 777          */
 778         return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 779                 mvm->last_ebs_successful &&
 780                 vif->type != NL80211_IFTYPE_P2P_DEVICE);
 781 }
 782
 783 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
 784 {
 785         return params->n_scan_plans == 1 &&
 786                 params->scan_plans[0].iterations == 1;
 787 }
 788
 789 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 790                                    struct iwl_mvm_scan_params *params,
 791                                    struct ieee80211_vif *vif)
 792 {
 793         int flags = 0;
 794
 795         if (params->n_ssids == 0)
 796                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
 797
 798         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
 799                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
 800
 801         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
 802                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 803
 804         if (iwl_mvm_rrm_scan_needed(mvm))
 805                 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 806
 807         if (params->pass_all)
 808                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
 809         else
 810                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
 811
 812 #ifdef CONFIG_IWLWIFI_DEBUGFS
 813         if (mvm->scan_iter_notif_enabled)
 814                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 815 #endif
 816
 817         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
 818                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 819
 820         if (iwl_mvm_is_regular_scan(params) &&
 821             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 822             params->type != IWL_SCAN_TYPE_FRAGMENTED)
 823                 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
 824
 825         return flags;
 826 }
 827
 828 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 829                              struct iwl_mvm_scan_params *params)
 830 {
 831         struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
 832         struct iwl_scan_probe_req *preq =
 833                 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
 834                          mvm->fw->ucode_capa.n_scan_channels);
 835         u32 ssid_bitmap = 0;
 836         int i;
 837
 838         lockdep_assert_held(&mvm->mutex);
 839
 840         memset(cmd, 0, ksize(cmd));
 841
 842         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
 843                 return -EINVAL;
 844
 845         iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
 846
 847         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
 848         cmd->iter_num = cpu_to_le32(1);
 849         cmd->n_channels = (u8)params->n_channels;
 850
 851         cmd->delay = cpu_to_le32(params->delay);
 852
 853         cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
 854                                                               vif));
 855
 856         cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
 857         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 858                                         MAC_FILTER_IN_BEACON);
 859         iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
 860         iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
 861
 862         /* this API uses bits 1-20 instead of 0-19 */
 863         ssid_bitmap <<= 1;
 864
 865         for (i = 0; i < params->n_scan_plans; i++) {
 866                 struct cfg80211_sched_scan_plan *scan_plan =
 867                         &params->scan_plans[i];
 868
 869                 cmd->schedule[i].delay =
 870                         cpu_to_le16(scan_plan->interval);
 871                 cmd->schedule[i].iterations = scan_plan->iterations;
 872                 cmd->schedule[i].full_scan_mul = 1;
 873         }
 874
 875         /*
 876          * If the number of iterations of the last scan plan is set to
 877          * zero, it should run infinitely. However, this is not always the case.
 878          * For example, when regular scan is requested the driver sets one scan
 879          * plan with one iteration.
 880          */
 881         if (!cmd->schedule[i - 1].iterations)
 882                 cmd->schedule[i - 1].iterations = 0xff;
 883
 884         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
 885                 cmd->channel_opt[0].flags =
 886                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 887                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 888                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 889                 cmd->channel_opt[0].non_ebs_ratio =
 890                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
 891                 cmd->channel_opt[1].flags =
 892                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 893                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 894                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 895                 cmd->channel_opt[1].non_ebs_ratio =
 896                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
 897         }
 898
 899         iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
 900                                        params->n_channels, ssid_bitmap, cmd);
 901
 902         *preq = params->preq;
 903
 904         return 0;
 905 }
 906
 907 static int rate_to_scan_rate_flag(unsigned int rate)
 908 {
 909         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
 910                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
 911                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
 912                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
 913                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
 914                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
 915                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
 916                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
 917                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
 918                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
 919                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
 920                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
 921                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
 922         };
 923
 924         return rate_to_scan_rate[rate];
 925 }
 926
 927 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
 928 {
 929         struct ieee80211_supported_band *band;
 930         unsigned int rates = 0;
 931         int i;
 932
 933         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 934         for (i = 0; i < band->n_bitrates; i++)
 935                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 936         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 937         for (i = 0; i < band->n_bitrates; i++)
 938                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 939
 940         /* Set both basic rates and supported rates */
 941         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
 942
 943         return cpu_to_le32(rates);
 944 }
 945
 946 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
 947 {
 948         struct iwl_scan_config *scan_config;
 949         struct ieee80211_supported_band *band;
 950         int num_channels =
 951                 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
 952                 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
 953         int ret, i, j = 0, cmd_size;
 954         struct iwl_host_cmd cmd = {
 955                 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
 956         };
 957         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
 958
 959         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
 960                 return -ENOBUFS;
 961
 962         if (type == mvm->scan_type) {
 963                 IWL_DEBUG_SCAN(mvm,
 964                                "Ignoring UMAC scan config of the same type\n");
 965                 return 0;
 966         }
 967
 968         cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
 969
 970         scan_config = kzalloc(cmd_size, GFP_KERNEL);
 971         if (!scan_config)
 972                 return -ENOMEM;
 973
 974         scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
 975                                          SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
 976                                          SCAN_CONFIG_FLAG_SET_TX_CHAINS |
 977                                          SCAN_CONFIG_FLAG_SET_RX_CHAINS |
 978                                          SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
 979                                          SCAN_CONFIG_FLAG_SET_ALL_TIMES |
 980                                          SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
 981                                          SCAN_CONFIG_FLAG_SET_MAC_ADDR |
 982                                          SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
 983                                          SCAN_CONFIG_N_CHANNELS(num_channels) |
 984                                          (type == IWL_SCAN_TYPE_FRAGMENTED ?
 985                                           SCAN_CONFIG_FLAG_SET_FRAGMENTED :
 986                                           SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
 987         scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
 988         scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
 989         scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
 990         scan_config->out_of_channel_time =
 991                 cpu_to_le32(scan_timing[type].max_out_time);
 992         scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
 993         scan_config->dwell_active = scan_timing[type].dwell_active;
 994         scan_config->dwell_passive = scan_timing[type].dwell_passive;
 995         scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
 996         scan_config->dwell_extended = scan_timing[type].dwell_extended;
 997
 998         memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
 999
1000         scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1001         scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1002                                      IWL_CHANNEL_FLAG_ACCURATE_EBS |
1003                                      IWL_CHANNEL_FLAG_EBS_ADD |
1004                                      IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1005
1006         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1007         for (i = 0; i < band->n_channels; i++, j++)
1008                 scan_config->channel_array[j] = band->channels[i].hw_value;
1009         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1010         for (i = 0; i < band->n_channels; i++, j++)
1011                 scan_config->channel_array[j] = band->channels[i].hw_value;
1012
1013         cmd.data[0] = scan_config;
1014         cmd.len[0] = cmd_size;
1015         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1016
1017         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1018
1019         ret = iwl_mvm_send_cmd(mvm, &cmd);
1020         if (!ret)
1021                 mvm->scan_type = type;
1022
1023         kfree(scan_config);
1024         return ret;
1025 }
1026
1027 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1028 {
1029         int i;
1030
1031         for (i = 0; i < mvm->max_scans; i++)
1032                 if (mvm->scan_uid_status[i] == status)
1033                         return i;
1034
1035         return -ENOENT;
1036 }
1037
1038 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1039                                     struct iwl_scan_req_umac *cmd,
1040                                     struct iwl_mvm_scan_params *params)
1041 {
1042         if (params->measurement_dwell) {
1043                 cmd->active_dwell = params->measurement_dwell;
1044                 cmd->passive_dwell = params->measurement_dwell;
1045                 cmd->extended_dwell = params->measurement_dwell;
1046         } else {
1047                 cmd->active_dwell = scan_timing[params->type].dwell_active;
1048                 cmd->passive_dwell = scan_timing[params->type].dwell_passive;
1049                 cmd->extended_dwell = scan_timing[params->type].dwell_extended;
1050         }
1051         cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
1052         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
1053         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
1054         cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1055
1056         if (iwl_mvm_is_regular_scan(params))
1057                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1058         else
1059                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1060 }
1061
1062 static void
1063 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1064                                struct ieee80211_channel **channels,
1065                                int n_channels, u32 ssid_bitmap,
1066                                struct iwl_scan_req_umac *cmd)
1067 {
1068         struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1069         int i;
1070
1071         for (i = 0; i < n_channels; i++) {
1072                 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1073                 channel_cfg[i].channel_num = channels[i]->hw_value;
1074                 channel_cfg[i].iter_count = 1;
1075                 channel_cfg[i].iter_interval = 0;
1076         }
1077 }
1078
1079 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1080                                    struct iwl_mvm_scan_params *params,
1081                                    struct ieee80211_vif *vif)
1082 {
1083         u16 flags = 0;
1084
1085         if (params->n_ssids == 0)
1086                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1087
1088         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1089                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1090
1091         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1092                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1093
1094         if (iwl_mvm_rrm_scan_needed(mvm))
1095                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1096
1097         if (params->pass_all)
1098                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1099         else
1100                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1101
1102         if (!iwl_mvm_is_regular_scan(params))
1103                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1104
1105         if (params->measurement_dwell)
1106                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1107
1108 #ifdef CONFIG_IWLWIFI_DEBUGFS
1109         if (mvm->scan_iter_notif_enabled)
1110                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1111 #endif
1112
1113         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1114                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1115
1116         if (iwl_mvm_is_regular_scan(params) &&
1117             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1118             params->type != IWL_SCAN_TYPE_FRAGMENTED)
1119                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1120
1121         return flags;
1122 }
1123
1124 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1125                              struct iwl_mvm_scan_params *params,
1126                              int type)
1127 {
1128         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1129         struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1130                 sizeof(struct iwl_scan_channel_cfg_umac) *
1131                         mvm->fw->ucode_capa.n_scan_channels;
1132         int uid, i;
1133         u32 ssid_bitmap = 0;
1134         struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
1135
1136         lockdep_assert_held(&mvm->mutex);
1137
1138         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1139                 return -EINVAL;
1140
1141         uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1142         if (uid < 0)
1143                 return uid;
1144
1145         memset(cmd, 0, ksize(cmd));
1146
1147         iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1148
1149         mvm->scan_uid_status[uid] = type;
1150
1151         cmd->uid = cpu_to_le32(uid);
1152         cmd->general_flags = cpu_to_le16(iwl_mvm_scan_umac_flags(mvm, params,
1153                                                                  vif));
1154         cmd->scan_start_mac_id = scan_vif->id;
1155
1156         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1157                 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1158
1159         if (iwl_mvm_scan_use_ebs(mvm, vif))
1160                 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1161                                      IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1162                                      IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1163
1164         cmd->n_channels = params->n_channels;
1165
1166         iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1167
1168         iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1169                                        params->n_channels, ssid_bitmap, cmd);
1170
1171         for (i = 0; i < params->n_scan_plans; i++) {
1172                 struct cfg80211_sched_scan_plan *scan_plan =
1173                         &params->scan_plans[i];
1174
1175                 sec_part->schedule[i].iter_count = scan_plan->iterations;
1176                 sec_part->schedule[i].interval =
1177                         cpu_to_le16(scan_plan->interval);
1178         }
1179
1180         /*
1181          * If the number of iterations of the last scan plan is set to
1182          * zero, it should run infinitely. However, this is not always the case.
1183          * For example, when regular scan is requested the driver sets one scan
1184          * plan with one iteration.
1185          */
1186         if (!sec_part->schedule[i - 1].iter_count)
1187                 sec_part->schedule[i - 1].iter_count = 0xff;
1188
1189         sec_part->delay = cpu_to_le16(params->delay);
1190         sec_part->preq = params->preq;
1191
1192         return 0;
1193 }
1194
1195 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1196 {
1197         return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1198 }
1199
1200 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1201 {
1202         /* This looks a bit arbitrary, but the idea is that if we run
1203          * out of possible simultaneous scans and the userspace is
1204          * trying to run a scan type that is already running, we
1205          * return -EBUSY.  But if the userspace wants to start a
1206          * different type of scan, we stop the opposite type to make
1207          * space for the new request.  The reason is backwards
1208          * compatibility with old wpa_supplicant that wouldn't stop a
1209          * scheduled scan before starting a normal scan.
1210          */
1211
1212         if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1213                 return 0;
1214
1215         /* Use a switch, even though this is a bitmask, so that more
1216          * than one bits set will fall in default and we will warn.
1217          */
1218         switch (type) {
1219         case IWL_MVM_SCAN_REGULAR:
1220                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1221                         return -EBUSY;
1222                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1223         case IWL_MVM_SCAN_SCHED:
1224                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1225                         return -EBUSY;
1226                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1227         case IWL_MVM_SCAN_NETDETECT:
1228                 /* No need to stop anything for net-detect since the
1229                  * firmware is restarted anyway.  This way, any sched
1230                  * scans that were running will be restarted when we
1231                  * resume.
1232                 */
1233                 return 0;
1234         default:
1235                 WARN_ON(1);
1236                 break;
1237         }
1238
1239         return -EIO;
1240 }
1241
1242 #define SCAN_TIMEOUT 20000
1243
1244 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
1245 {
1246         struct delayed_work *delayed_work = to_delayed_work(work);
1247         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1248                                            scan_timeout_dwork);
1249
1250         IWL_ERR(mvm, "regular scan timed out\n");
1251
1252         iwl_force_nmi(mvm->trans);
1253 }
1254
1255 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1256                            struct cfg80211_scan_request *req,
1257                            struct ieee80211_scan_ies *ies)
1258 {
1259         struct iwl_host_cmd hcmd = {
1260                 .len = { iwl_mvm_scan_size(mvm), },
1261                 .data = { mvm->scan_cmd, },
1262                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1263         };
1264         struct iwl_mvm_scan_params params = {};
1265         int ret;
1266         struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1267
1268         lockdep_assert_held(&mvm->mutex);
1269
1270         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1271                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1272                 return -EBUSY;
1273         }
1274
1275         ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1276         if (ret)
1277                 return ret;
1278
1279         /* we should have failed registration if scan_cmd was NULL */
1280         if (WARN_ON(!mvm->scan_cmd))
1281                 return -ENOMEM;
1282
1283         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1284                 return -ENOBUFS;
1285
1286         params.n_ssids = req->n_ssids;
1287         params.flags = req->flags;
1288         params.n_channels = req->n_channels;
1289         params.delay = 0;
1290         params.ssids = req->ssids;
1291         params.channels = req->channels;
1292         params.mac_addr = req->mac_addr;
1293         params.mac_addr_mask = req->mac_addr_mask;
1294         params.no_cck = req->no_cck;
1295         params.pass_all = true;
1296         params.n_match_sets = 0;
1297         params.match_sets = NULL;
1298
1299         params.scan_plans = &scan_plan;
1300         params.n_scan_plans = 1;
1301
1302         params.type =
1303                 iwl_mvm_get_scan_type(mvm,
1304                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1305
1306         ret = iwl_mvm_get_measurement_dwell(mvm, req, &params);
1307         if (ret < 0)
1308                 return ret;
1309
1310         params.measurement_dwell = ret;
1311
1312         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1313
1314         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1315                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1316                 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1317                                         IWL_MVM_SCAN_REGULAR);
1318         } else {
1319                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1320                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1321         }
1322
1323         if (ret)
1324                 return ret;
1325
1326         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1327         if (ret) {
1328                 /* If the scan failed, it usually means that the FW was unable
1329                  * to allocate the time events. Warn on it, but maybe we
1330                  * should try to send the command again with different params.
1331                  */
1332                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1333                 return ret;
1334         }
1335
1336         IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1337         mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1338         mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
1339         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1340
1341         queue_delayed_work(system_wq, &mvm->scan_timeout_dwork,
1342                            msecs_to_jiffies(SCAN_TIMEOUT));
1343
1344         return 0;
1345 }
1346
1347 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1348                              struct ieee80211_vif *vif,
1349                              struct cfg80211_sched_scan_request *req,
1350                              struct ieee80211_scan_ies *ies,
1351                              int type)
1352 {
1353         struct iwl_host_cmd hcmd = {
1354                 .len = { iwl_mvm_scan_size(mvm), },
1355                 .data = { mvm->scan_cmd, },
1356                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1357         };
1358         struct iwl_mvm_scan_params params = {};
1359         int ret;
1360
1361         lockdep_assert_held(&mvm->mutex);
1362
1363         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1364                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1365                 return -EBUSY;
1366         }
1367
1368         ret = iwl_mvm_check_running_scans(mvm, type);
1369         if (ret)
1370                 return ret;
1371
1372         /* we should have failed registration if scan_cmd was NULL */
1373         if (WARN_ON(!mvm->scan_cmd))
1374                 return -ENOMEM;
1375
1376         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1377                 return -ENOBUFS;
1378
1379         params.n_ssids = req->n_ssids;
1380         params.flags = req->flags;
1381         params.n_channels = req->n_channels;
1382         params.ssids = req->ssids;
1383         params.channels = req->channels;
1384         params.mac_addr = req->mac_addr;
1385         params.mac_addr_mask = req->mac_addr_mask;
1386         params.no_cck = false;
1387         params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
1388         params.n_match_sets = req->n_match_sets;
1389         params.match_sets = req->match_sets;
1390         if (!req->n_scan_plans)
1391                 return -EINVAL;
1392
1393         params.n_scan_plans = req->n_scan_plans;
1394         params.scan_plans = req->scan_plans;
1395
1396         params.type =
1397                 iwl_mvm_get_scan_type(mvm,
1398                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1399
1400         /* In theory, LMAC scans can handle a 32-bit delay, but since
1401          * waiting for over 18 hours to start the scan is a bit silly
1402          * and to keep it aligned with UMAC scans (which only support
1403          * 16-bit delays), trim it down to 16-bits.
1404          */
1405         if (req->delay > U16_MAX) {
1406                 IWL_DEBUG_SCAN(mvm,
1407                                "delay value is > 16-bits, set to max possible\n");
1408                 params.delay = U16_MAX;
1409         } else {
1410                 params.delay = req->delay;
1411         }
1412
1413         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1414         if (ret)
1415                 return ret;
1416
1417         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1418
1419         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1420                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1421                 ret = iwl_mvm_scan_umac(mvm, vif, &params, type);
1422         } else {
1423                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1424                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1425         }
1426
1427         if (ret)
1428                 return ret;
1429
1430         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1431         if (!ret) {
1432                 IWL_DEBUG_SCAN(mvm,
1433                                "Sched scan request was sent successfully\n");
1434                 mvm->scan_status |= type;
1435         } else {
1436                 /* If the scan failed, it usually means that the FW was unable
1437                  * to allocate the time events. Warn on it, but maybe we
1438                  * should try to send the command again with different params.
1439                  */
1440                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1441         }
1442
1443         return ret;
1444 }
1445
1446 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1447                                          struct iwl_rx_cmd_buffer *rxb)
1448 {
1449         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1450         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1451         u32 uid = __le32_to_cpu(notif->uid);
1452         bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1453
1454         if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1455                 return;
1456
1457         /* if the scan is already stopping, we don't need to notify mac80211 */
1458         if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1459                 struct cfg80211_scan_info info = {
1460                         .aborted = aborted,
1461                         .scan_start_tsf = mvm->scan_start,
1462                 };
1463
1464                 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN);
1465                 ieee80211_scan_completed(mvm->hw, &info);
1466                 mvm->scan_vif = NULL;
1467                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1468                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1469         } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1470                 ieee80211_sched_scan_stopped(mvm->hw);
1471                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1472         }
1473
1474         mvm->scan_status &= ~mvm->scan_uid_status[uid];
1475         IWL_DEBUG_SCAN(mvm,
1476                        "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1477                        uid, mvm->scan_uid_status[uid],
1478                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1479                                 "completed" : "aborted",
1480                        iwl_mvm_ebs_status_str(notif->ebs_status));
1481         IWL_DEBUG_SCAN(mvm,
1482                        "Last line %d, Last iteration %d, Time from last iteration %d\n",
1483                        notif->last_schedule, notif->last_iter,
1484                        __le32_to_cpu(notif->time_from_last_iter));
1485
1486         if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1487             notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1488                 mvm->last_ebs_successful = false;
1489
1490         mvm->scan_uid_status[uid] = 0;
1491 }
1492
1493 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1494                                               struct iwl_rx_cmd_buffer *rxb)
1495 {
1496         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1497         struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1498         u8 buf[256];
1499
1500         mvm->scan_start = le64_to_cpu(notif->start_tsf);
1501
1502         IWL_DEBUG_SCAN(mvm,
1503                        "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1504                        notif->status, notif->scanned_channels,
1505                        iwl_mvm_dump_channel_list(notif->results,
1506                                                  notif->scanned_channels, buf,
1507                                                  sizeof(buf)));
1508
1509         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1510                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1511                 ieee80211_sched_scan_results(mvm->hw);
1512                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1513         }
1514
1515         IWL_DEBUG_SCAN(mvm,
1516                        "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
1517                        mvm->scan_start);
1518 }
1519
1520 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1521 {
1522         struct iwl_umac_scan_abort cmd = {};
1523         int uid, ret;
1524
1525         lockdep_assert_held(&mvm->mutex);
1526
1527         /* We should always get a valid index here, because we already
1528          * checked that this type of scan was running in the generic
1529          * code.
1530          */
1531         uid = iwl_mvm_scan_uid_by_status(mvm, type);
1532         if (WARN_ON_ONCE(uid < 0))
1533                 return uid;
1534
1535         cmd.uid = cpu_to_le32(uid);
1536
1537         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1538
1539         ret = iwl_mvm_send_cmd_pdu(mvm,
1540                                    iwl_cmd_id(SCAN_ABORT_UMAC,
1541                                               IWL_ALWAYS_LONG_GROUP, 0),
1542                                    0, sizeof(cmd), &cmd);
1543         if (!ret)
1544                 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1545
1546         return ret;
1547 }
1548
1549 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1550 {
1551         struct iwl_notification_wait wait_scan_done;
1552         static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1553                                               SCAN_OFFLOAD_COMPLETE, };
1554         int ret;
1555
1556         lockdep_assert_held(&mvm->mutex);
1557
1558         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1559                                    scan_done_notif,
1560                                    ARRAY_SIZE(scan_done_notif),
1561                                    NULL, NULL);
1562
1563         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1564
1565         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1566                 ret = iwl_mvm_umac_scan_abort(mvm, type);
1567         else
1568                 ret = iwl_mvm_lmac_scan_abort(mvm);
1569
1570         if (ret) {
1571                 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1572                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1573                 return ret;
1574         }
1575
1576         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1577
1578         return ret;
1579 }
1580
1581 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1582 {
1583         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1584                 return sizeof(struct iwl_scan_req_umac) +
1585                         sizeof(struct iwl_scan_channel_cfg_umac) *
1586                                 mvm->fw->ucode_capa.n_scan_channels +
1587                         sizeof(struct iwl_scan_req_umac_tail);
1588
1589         return sizeof(struct iwl_scan_req_lmac) +
1590                 sizeof(struct iwl_scan_channel_cfg_lmac) *
1591                 mvm->fw->ucode_capa.n_scan_channels +
1592                 sizeof(struct iwl_scan_probe_req);
1593 }
1594
1595 /*
1596  * This function is used in nic restart flow, to inform mac80211 about scans
1597  * that was aborted by restart flow or by an assert.
1598  */
1599 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1600 {
1601         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1602                 int uid, i;
1603
1604                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1605                 if (uid >= 0) {
1606                         struct cfg80211_scan_info info = {
1607                                 .aborted = true,
1608                         };
1609
1610                         ieee80211_scan_completed(mvm->hw, &info);
1611                         mvm->scan_uid_status[uid] = 0;
1612                 }
1613                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1614                 if (uid >= 0 && !mvm->restart_fw) {
1615                         ieee80211_sched_scan_stopped(mvm->hw);
1616                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1617                         mvm->scan_uid_status[uid] = 0;
1618                 }
1619
1620                 /* We shouldn't have any UIDs still set.  Loop over all the
1621                  * UIDs to make sure there's nothing left there and warn if
1622                  * any is found.
1623                  */
1624                 for (i = 0; i < mvm->max_scans; i++) {
1625                         if (WARN_ONCE(mvm->scan_uid_status[i],
1626                                       "UMAC scan UID %d status was not cleaned\n",
1627                                       i))
1628                                 mvm->scan_uid_status[i] = 0;
1629                 }
1630         } else {
1631                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
1632                         struct cfg80211_scan_info info = {
1633                                 .aborted = true,
1634                         };
1635
1636                         ieee80211_scan_completed(mvm->hw, &info);
1637                 }
1638
1639                 /* Sched scan will be restarted by mac80211 in
1640                  * restart_hw, so do not report if FW is about to be
1641                  * restarted.
1642                  */
1643                 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
1644                     !mvm->restart_fw) {
1645                         ieee80211_sched_scan_stopped(mvm->hw);
1646                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1647                 }
1648         }
1649 }
1650
1651 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1652 {
1653         int ret;
1654
1655         if (!(mvm->scan_status & type))
1656                 return 0;
1657
1658         if (iwl_mvm_is_radio_killed(mvm)) {
1659                 ret = 0;
1660                 goto out;
1661         }
1662
1663         ret = iwl_mvm_scan_stop_wait(mvm, type);
1664         if (!ret)
1665                 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1666 out:
1667         /* Clear the scan status so the next scan requests will
1668          * succeed and mark the scan as stopping, so that the Rx
1669          * handler doesn't do anything, as the scan was stopped from
1670          * above.
1671          */
1672         mvm->scan_status &= ~type;
1673
1674         if (type == IWL_MVM_SCAN_REGULAR) {
1675                 /* Since the rx handler won't do anything now, we have
1676                  * to release the scan reference here.
1677                  */
1678                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1679                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1680                 if (notify) {
1681                         struct cfg80211_scan_info info = {
1682                                 .aborted = true,
1683                         };
1684
1685                         ieee80211_scan_completed(mvm->hw, &info);
1686                 }
1687         } else if (notify) {
1688                 ieee80211_sched_scan_stopped(mvm->hw);
1689                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1690         }
1691
1692         return ret;
1693 }