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

   1 /******************************************************************************
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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 };
 145
 146 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
 147 {
 148         if (mvm->scan_rx_ant != ANT_NONE)
 149                 return mvm->scan_rx_ant;
 150         return iwl_mvm_get_valid_rx_ant(mvm);
 151 }
 152
 153 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 154 {
 155         u16 rx_chain;
 156         u8 rx_ant;
 157
 158         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 159         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 160         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 161         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 162         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 163         return cpu_to_le16(rx_chain);
 164 }
 165
 166 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band)
 167 {
 168         if (band == NL80211_BAND_2GHZ)
 169                 return cpu_to_le32(PHY_BAND_24);
 170         else
 171                 return cpu_to_le32(PHY_BAND_5);
 172 }
 173
 174 static inline __le32
 175 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
 176                           bool no_cck)
 177 {
 178         u32 tx_ant;
 179
 180         mvm->scan_last_antenna_idx =
 181                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 182                                      mvm->scan_last_antenna_idx);
 183         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 184
 185         if (band == NL80211_BAND_2GHZ && !no_cck)
 186                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 187                                    tx_ant);
 188         else
 189                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 190 }
 191
 192 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 193                                             struct ieee80211_vif *vif)
 194 {
 195         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 196         int *global_cnt = data;
 197
 198         if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 199             mvmvif->phy_ctxt->id < MAX_PHYS)
 200                 *global_cnt += 1;
 201 }
 202
 203 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
 204 {
 205         return IWL_MVM_TRAFFIC_LOW;
 206 }
 207
 208 static enum
 209 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
 210 {
 211         int global_cnt = 0;
 212         enum iwl_mvm_traffic_load load;
 213         bool low_latency;
 214
 215         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 216                                             IEEE80211_IFACE_ITER_NORMAL,
 217                                             iwl_mvm_scan_condition_iterator,
 218                                             &global_cnt);
 219         if (!global_cnt)
 220                 return IWL_SCAN_TYPE_UNASSOC;
 221
 222         load = iwl_mvm_get_traffic_load(mvm);
 223         low_latency = iwl_mvm_low_latency(mvm);
 224
 225         if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
 226             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
 227                 return IWL_SCAN_TYPE_FRAGMENTED;
 228
 229         if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
 230                 return IWL_SCAN_TYPE_MILD;
 231
 232         return IWL_SCAN_TYPE_WILD;
 233 }
 234
 235 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 236 {
 237         /* require rrm scan whenever the fw supports it */
 238         return fw_has_capa(&mvm->fw->ucode_capa,
 239                            IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
 240 }
 241
 242 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
 243 {
 244         int max_probe_len;
 245
 246         max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 247
 248         /* we create the 802.11 header and SSID element */
 249         max_probe_len -= 24 + 2;
 250
 251         /* DS parameter set element is added on 2.4GHZ band if required */
 252         if (iwl_mvm_rrm_scan_needed(mvm))
 253                 max_probe_len -= 3;
 254
 255         return max_probe_len;
 256 }
 257
 258 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 259 {
 260         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
 261
 262         /* TODO: [BUG] This function should return the maximum allowed size of
 263          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 264          * in the same command. So the correct implementation of this function
 265          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 266          * command has only 512 bytes and it would leave us with about 240
 267          * bytes for scan IEs, which is clearly not enough. So meanwhile
 268          * we will report an incorrect value. This may result in a failure to
 269          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 270          * functions with -ENOBUFS, if a large enough probe will be provided.
 271          */
 272         return max_ie_len;
 273 }
 274
 275 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
 276                                      int num_res, u8 *buf, size_t buf_size)
 277 {
 278         int i;
 279         u8 *pos = buf, *end = buf + buf_size;
 280
 281         for (i = 0; pos < end && i < num_res; i++)
 282                 pos += snprintf(pos, end - pos, " %u", res[i].channel);
 283
 284         /* terminate the string in case the buffer was too short */
 285         *(buf + buf_size - 1) = '\0';
 286
 287         return buf;
 288 }
 289
 290 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 291                                               struct iwl_rx_cmd_buffer *rxb)
 292 {
 293         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 294         struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
 295         u8 buf[256];
 296
 297         IWL_DEBUG_SCAN(mvm,
 298                        "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
 299                        notif->status, notif->scanned_channels,
 300                        iwl_mvm_dump_channel_list(notif->results,
 301                                                  notif->scanned_channels, buf,
 302                                                  sizeof(buf)));
 303
 304         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
 305                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
 306                 ieee80211_sched_scan_results(mvm->hw);
 307                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 308         }
 309 }
 310
 311 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
 312                                  struct iwl_rx_cmd_buffer *rxb)
 313 {
 314         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 315         ieee80211_sched_scan_results(mvm->hw);
 316 }
 317
 318 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
 319 {
 320         switch (status) {
 321         case IWL_SCAN_EBS_SUCCESS:
 322                 return "successful";
 323         case IWL_SCAN_EBS_INACTIVE:
 324                 return "inactive";
 325         case IWL_SCAN_EBS_FAILED:
 326         case IWL_SCAN_EBS_CHAN_NOT_FOUND:
 327         default:
 328                 return "failed";
 329         }
 330 }
 331
 332 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
 333                                          struct iwl_rx_cmd_buffer *rxb)
 334 {
 335         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 336         struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
 337         bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 338
 339         /* If this happens, the firmware has mistakenly sent an LMAC
 340          * notification during UMAC scans -- warn and ignore it.
 341          */
 342         if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
 343                                      IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
 344                 return;
 345
 346         /* scan status must be locked for proper checking */
 347         lockdep_assert_held(&mvm->mutex);
 348
 349         /* We first check if we were stopping a scan, in which case we
 350          * just clear the stopping flag.  Then we check if it was a
 351          * firmware initiated stop, in which case we need to inform
 352          * mac80211.
 353          * Note that we can have a stopping and a running scan
 354          * simultaneously, but we can't have two different types of
 355          * scans stopping or running at the same time (since LMAC
 356          * doesn't support it).
 357          */
 358
 359         if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
 360                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
 361
 362                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 363                                aborted ? "aborted" : "completed",
 364                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 365                 IWL_DEBUG_SCAN(mvm,
 366                                "Last line %d, Last iteration %d, Time after last iteration %d\n",
 367                                scan_notif->last_schedule_line,
 368                                scan_notif->last_schedule_iteration,
 369                                __le32_to_cpu(scan_notif->time_after_last_iter));
 370
 371                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
 372         } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
 373                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
 374                                aborted ? "aborted" : "completed",
 375                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 376
 377                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
 378         } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
 379                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
 380
 381                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 382                                aborted ? "aborted" : "completed",
 383                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 384                 IWL_DEBUG_SCAN(mvm,
 385                                "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
 386                                scan_notif->last_schedule_line,
 387                                scan_notif->last_schedule_iteration,
 388                                __le32_to_cpu(scan_notif->time_after_last_iter));
 389
 390                 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
 391                 ieee80211_sched_scan_stopped(mvm->hw);
 392                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 393         } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
 394                 struct cfg80211_scan_info info = {
 395                         .aborted = aborted,
 396                 };
 397
 398                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
 399                                aborted ? "aborted" : "completed",
 400                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 401
 402                 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
 403                 ieee80211_scan_completed(mvm->hw, &info);
 404                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 405                 cancel_delayed_work(&mvm->scan_timeout_dwork);
 406         } else {
 407                 IWL_ERR(mvm,
 408                         "got scan complete notification but no scan is running\n");
 409         }
 410
 411         mvm->last_ebs_successful =
 412                         scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
 413                         scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
 414 }
 415
 416 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 417 {
 418         int i;
 419
 420         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 421                 if (!ssid_list[i].len)
 422                         break;
 423                 if (ssid_list[i].len == ssid_len &&
 424                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 425                         return i;
 426         }
 427         return -1;
 428 }
 429
 430 /* We insert the SSIDs in an inverted order, because the FW will
 431  * invert it back.
 432  */
 433 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
 434                                  struct iwl_ssid_ie *ssids,
 435                                  u32 *ssid_bitmap)
 436 {
 437         int i, j;
 438         int index;
 439
 440         /*
 441          * copy SSIDs from match list.
 442          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 443          * config match list.
 444          */
 445         for (i = 0, j = params->n_match_sets - 1;
 446              j >= 0 && i < PROBE_OPTION_MAX;
 447              i++, j--) {
 448                 /* skip empty SSID matchsets */
 449                 if (!params->match_sets[j].ssid.ssid_len)
 450                         continue;
 451                 ssids[i].id = WLAN_EID_SSID;
 452                 ssids[i].len = params->match_sets[j].ssid.ssid_len;
 453                 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
 454                        ssids[i].len);
 455         }
 456
 457         /* add SSIDs from scan SSID list */
 458         *ssid_bitmap = 0;
 459         for (j = params->n_ssids - 1;
 460              j >= 0 && i < PROBE_OPTION_MAX;
 461              i++, j--) {
 462                 index = iwl_ssid_exist(params->ssids[j].ssid,
 463                                        params->ssids[j].ssid_len,
 464                                        ssids);
 465                 if (index < 0) {
 466                         ssids[i].id = WLAN_EID_SSID;
 467                         ssids[i].len = params->ssids[j].ssid_len;
 468                         memcpy(ssids[i].ssid, params->ssids[j].ssid,
 469                                ssids[i].len);
 470                         *ssid_bitmap |= BIT(i);
 471                 } else {
 472                         *ssid_bitmap |= BIT(index);
 473                 }
 474         }
 475 }
 476
 477 static int
 478 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 479                                    struct cfg80211_sched_scan_request *req)
 480 {
 481         struct iwl_scan_offload_profile *profile;
 482         struct iwl_scan_offload_profile_cfg *profile_cfg;
 483         struct iwl_scan_offload_blacklist *blacklist;
 484         struct iwl_host_cmd cmd = {
 485                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 486                 .len[1] = sizeof(*profile_cfg),
 487                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 488                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 489         };
 490         int blacklist_len;
 491         int i;
 492         int ret;
 493
 494         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 495                 return -EIO;
 496
 497         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 498                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 499         else
 500                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 501
 502         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 503         if (!blacklist)
 504                 return -ENOMEM;
 505
 506         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 507         if (!profile_cfg) {
 508                 ret = -ENOMEM;
 509                 goto free_blacklist;
 510         }
 511
 512         cmd.data[0] = blacklist;
 513         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 514         cmd.data[1] = profile_cfg;
 515
 516         /* No blacklist configuration */
 517
 518         profile_cfg->num_profiles = req->n_match_sets;
 519         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 520         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 521         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 522         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 523                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 524
 525         for (i = 0; i < req->n_match_sets; i++) {
 526                 profile = &profile_cfg->profiles[i];
 527                 profile->ssid_index = i;
 528                 /* Support any cipher and auth algorithm */
 529                 profile->unicast_cipher = 0xff;
 530                 profile->auth_alg = 0xff;
 531                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 532                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 533                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 534         }
 535
 536         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 537
 538         ret = iwl_mvm_send_cmd(mvm, &cmd);
 539         kfree(profile_cfg);
 540 free_blacklist:
 541         kfree(blacklist);
 542
 543         return ret;
 544 }
 545
 546 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
 547                                   struct cfg80211_sched_scan_request *req)
 548 {
 549         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 550                 IWL_DEBUG_SCAN(mvm,
 551                                "Sending scheduled scan with filtering, n_match_sets %d\n",
 552                                req->n_match_sets);
 553                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 554                 return false;
 555         }
 556
 557         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
 558
 559         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 560         return true;
 561 }
 562
 563 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
 564 {
 565         int ret;
 566         struct iwl_host_cmd cmd = {
 567                 .id = SCAN_OFFLOAD_ABORT_CMD,
 568         };
 569         u32 status;
 570
 571         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
 572         if (ret)
 573                 return ret;
 574
 575         if (status != CAN_ABORT_STATUS) {
 576                 /*
 577                  * The scan abort will return 1 for success or
 578                  * 2 for "failure".  A failure condition can be
 579                  * due to simply not being in an active scan which
 580                  * can occur if we send the scan abort before the
 581                  * microcode has notified us that a scan is completed.
 582                  */
 583                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
 584                 ret = -ENOENT;
 585         }
 586
 587         return ret;
 588 }
 589
 590 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
 591                                      struct iwl_scan_req_tx_cmd *tx_cmd,
 592                                      bool no_cck)
 593 {
 594         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 595                                          TX_CMD_FLG_BT_DIS);
 596         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 597                                                            NL80211_BAND_2GHZ,
 598                                                            no_cck);
 599         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
 600
 601         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 602                                          TX_CMD_FLG_BT_DIS);
 603         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 604                                                            NL80211_BAND_5GHZ,
 605                                                            no_cck);
 606         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
 607 }
 608
 609 static void
 610 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
 611                                struct ieee80211_channel **channels,
 612                                int n_channels, u32 ssid_bitmap,
 613                                struct iwl_scan_req_lmac *cmd)
 614 {
 615         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
 616         int i;
 617
 618         for (i = 0; i < n_channels; i++) {
 619                 channel_cfg[i].channel_num =
 620                         cpu_to_le16(channels[i]->hw_value);
 621                 channel_cfg[i].iter_count = cpu_to_le16(1);
 622                 channel_cfg[i].iter_interval = 0;
 623                 channel_cfg[i].flags =
 624                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
 625                                     ssid_bitmap);
 626         }
 627 }
 628
 629 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 630                                            size_t len, u8 *const pos)
 631 {
 632         static const u8 before_ds_params[] = {
 633                         WLAN_EID_SSID,
 634                         WLAN_EID_SUPP_RATES,
 635                         WLAN_EID_REQUEST,
 636                         WLAN_EID_EXT_SUPP_RATES,
 637         };
 638         size_t offs;
 639         u8 *newpos = pos;
 640
 641         if (!iwl_mvm_rrm_scan_needed(mvm)) {
 642                 memcpy(newpos, ies, len);
 643                 return newpos + len;
 644         }
 645
 646         offs = ieee80211_ie_split(ies, len,
 647                                   before_ds_params,
 648                                   ARRAY_SIZE(before_ds_params),
 649                                   0);
 650
 651         memcpy(newpos, ies, offs);
 652         newpos += offs;
 653
 654         /* Add a placeholder for DS Parameter Set element */
 655         *newpos++ = WLAN_EID_DS_PARAMS;
 656         *newpos++ = 1;
 657         *newpos++ = 0;
 658
 659         memcpy(newpos, ies + offs, len - offs);
 660         newpos += len - offs;
 661
 662         return newpos;
 663 }
 664
 665 static void
 666 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 667                          struct ieee80211_scan_ies *ies,
 668                          struct iwl_mvm_scan_params *params)
 669 {
 670         struct ieee80211_mgmt *frame = (void *)params->preq.buf;
 671         u8 *pos, *newpos;
 672         const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
 673                 params->mac_addr : NULL;
 674
 675         /*
 676          * Unfortunately, right now the offload scan doesn't support randomising
 677          * within the firmware, so until the firmware API is ready we implement
 678          * it in the driver. This means that the scan iterations won't really be
 679          * random, only when it's restarted, but at least that helps a bit.
 680          */
 681         if (mac_addr)
 682                 get_random_mask_addr(frame->sa, mac_addr,
 683                                      params->mac_addr_mask);
 684         else
 685                 memcpy(frame->sa, vif->addr, ETH_ALEN);
 686
 687         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 688         eth_broadcast_addr(frame->da);
 689         eth_broadcast_addr(frame->bssid);
 690         frame->seq_ctrl = 0;
 691
 692         pos = frame->u.probe_req.variable;
 693         *pos++ = WLAN_EID_SSID;
 694         *pos++ = 0;
 695
 696         params->preq.mac_header.offset = 0;
 697         params->preq.mac_header.len = cpu_to_le16(24 + 2);
 698
 699         /* Insert ds parameter set element on 2.4 GHz band */
 700         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
 701                                                  ies->ies[NL80211_BAND_2GHZ],
 702                                                  ies->len[NL80211_BAND_2GHZ],
 703                                                  pos);
 704         params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
 705         params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
 706         pos = newpos;
 707
 708         memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
 709                ies->len[NL80211_BAND_5GHZ]);
 710         params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
 711         params->preq.band_data[1].len =
 712                 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
 713         pos += ies->len[NL80211_BAND_5GHZ];
 714
 715         memcpy(pos, ies->common_ies, ies->common_ie_len);
 716         params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
 717         params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
 718 }
 719
 720 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm,
 721                                     enum iwl_scan_priority_ext prio)
 722 {
 723         if (fw_has_api(&mvm->fw->ucode_capa,
 724                        IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY))
 725                 return cpu_to_le32(prio);
 726
 727         if (prio <= IWL_SCAN_PRIORITY_EXT_2)
 728                 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
 729
 730         if (prio <= IWL_SCAN_PRIORITY_EXT_4)
 731                 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
 732
 733         return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
 734 }
 735
 736 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
 737                                     struct iwl_scan_req_lmac *cmd,
 738                                     struct iwl_mvm_scan_params *params)
 739 {
 740         cmd->active_dwell = scan_timing[params->type].dwell_active;
 741         cmd->passive_dwell = scan_timing[params->type].dwell_passive;
 742         cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
 743         cmd->extended_dwell = scan_timing[params->type].dwell_extended;
 744         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
 745         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
 746         cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
 747 }
 748
 749 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
 750                                      struct ieee80211_scan_ies *ies,
 751                                      int n_channels)
 752 {
 753         return ((n_ssids <= PROBE_OPTION_MAX) &&
 754                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
 755                 (ies->common_ie_len +
 756                  ies->len[NL80211_BAND_2GHZ] +
 757                  ies->len[NL80211_BAND_5GHZ] <=
 758                  iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
 759 }
 760
 761 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 762                                         struct ieee80211_vif *vif)
 763 {
 764         const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
 765
 766         /* We can only use EBS if:
 767          *      1. the feature is supported;
 768          *      2. the last EBS was successful;
 769          *      3. if only single scan, the single scan EBS API is supported;
 770          *      4. it's not a p2p find operation.
 771          */
 772         return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 773                 mvm->last_ebs_successful &&
 774                 vif->type != NL80211_IFTYPE_P2P_DEVICE);
 775 }
 776
 777 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
 778 {
 779         return params->n_scan_plans == 1 &&
 780                 params->scan_plans[0].iterations == 1;
 781 }
 782
 783 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 784                                    struct iwl_mvm_scan_params *params,
 785                                    struct ieee80211_vif *vif)
 786 {
 787         int flags = 0;
 788
 789         if (params->n_ssids == 0)
 790                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
 791
 792         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
 793                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
 794
 795         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
 796                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 797
 798         if (iwl_mvm_rrm_scan_needed(mvm))
 799                 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 800
 801         if (params->pass_all)
 802                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
 803         else
 804                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
 805
 806 #ifdef CONFIG_IWLWIFI_DEBUGFS
 807         if (mvm->scan_iter_notif_enabled)
 808                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 809 #endif
 810
 811         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
 812                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 813
 814         if (iwl_mvm_is_regular_scan(params) &&
 815             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 816             params->type != IWL_SCAN_TYPE_FRAGMENTED)
 817                 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
 818
 819         return flags;
 820 }
 821
 822 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 823                              struct iwl_mvm_scan_params *params)
 824 {
 825         struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
 826         struct iwl_scan_probe_req *preq =
 827                 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
 828                          mvm->fw->ucode_capa.n_scan_channels);
 829         u32 ssid_bitmap = 0;
 830         int i;
 831
 832         lockdep_assert_held(&mvm->mutex);
 833
 834         memset(cmd, 0, ksize(cmd));
 835
 836         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
 837                 return -EINVAL;
 838
 839         iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
 840
 841         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
 842         cmd->iter_num = cpu_to_le32(1);
 843         cmd->n_channels = (u8)params->n_channels;
 844
 845         cmd->delay = cpu_to_le32(params->delay);
 846
 847         cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
 848                                                               vif));
 849
 850         cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
 851         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 852                                         MAC_FILTER_IN_BEACON);
 853         iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
 854         iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
 855
 856         /* this API uses bits 1-20 instead of 0-19 */
 857         ssid_bitmap <<= 1;
 858
 859         for (i = 0; i < params->n_scan_plans; i++) {
 860                 struct cfg80211_sched_scan_plan *scan_plan =
 861                         &params->scan_plans[i];
 862
 863                 cmd->schedule[i].delay =
 864                         cpu_to_le16(scan_plan->interval);
 865                 cmd->schedule[i].iterations = scan_plan->iterations;
 866                 cmd->schedule[i].full_scan_mul = 1;
 867         }
 868
 869         /*
 870          * If the number of iterations of the last scan plan is set to
 871          * zero, it should run infinitely. However, this is not always the case.
 872          * For example, when regular scan is requested the driver sets one scan
 873          * plan with one iteration.
 874          */
 875         if (!cmd->schedule[i - 1].iterations)
 876                 cmd->schedule[i - 1].iterations = 0xff;
 877
 878         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
 879                 cmd->channel_opt[0].flags =
 880                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 881                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 882                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 883                 cmd->channel_opt[0].non_ebs_ratio =
 884                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
 885                 cmd->channel_opt[1].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[1].non_ebs_ratio =
 890                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
 891         }
 892
 893         iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
 894                                        params->n_channels, ssid_bitmap, cmd);
 895
 896         *preq = params->preq;
 897
 898         return 0;
 899 }
 900
 901 static int rate_to_scan_rate_flag(unsigned int rate)
 902 {
 903         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
 904                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
 905                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
 906                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
 907                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
 908                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
 909                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
 910                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
 911                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
 912                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
 913                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
 914                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
 915                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
 916         };
 917
 918         return rate_to_scan_rate[rate];
 919 }
 920
 921 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
 922 {
 923         struct ieee80211_supported_band *band;
 924         unsigned int rates = 0;
 925         int i;
 926
 927         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 928         for (i = 0; i < band->n_bitrates; i++)
 929                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 930         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 931         for (i = 0; i < band->n_bitrates; i++)
 932                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 933
 934         /* Set both basic rates and supported rates */
 935         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
 936
 937         return cpu_to_le32(rates);
 938 }
 939
 940 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
 941 {
 942         struct iwl_scan_config *scan_config;
 943         struct ieee80211_supported_band *band;
 944         int num_channels =
 945                 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
 946                 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
 947         int ret, i, j = 0, cmd_size;
 948         struct iwl_host_cmd cmd = {
 949                 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
 950         };
 951         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
 952
 953         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
 954                 return -ENOBUFS;
 955
 956         if (type == mvm->scan_type) {
 957                 IWL_DEBUG_SCAN(mvm,
 958                                "Ignoring UMAC scan config of the same type\n");
 959                 return 0;
 960         }
 961
 962         cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
 963
 964         scan_config = kzalloc(cmd_size, GFP_KERNEL);
 965         if (!scan_config)
 966                 return -ENOMEM;
 967
 968         scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
 969                                          SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
 970                                          SCAN_CONFIG_FLAG_SET_TX_CHAINS |
 971                                          SCAN_CONFIG_FLAG_SET_RX_CHAINS |
 972                                          SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
 973                                          SCAN_CONFIG_FLAG_SET_ALL_TIMES |
 974                                          SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
 975                                          SCAN_CONFIG_FLAG_SET_MAC_ADDR |
 976                                          SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
 977                                          SCAN_CONFIG_N_CHANNELS(num_channels) |
 978                                          (type == IWL_SCAN_TYPE_FRAGMENTED ?
 979                                           SCAN_CONFIG_FLAG_SET_FRAGMENTED :
 980                                           SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
 981         scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
 982         scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
 983         scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
 984         scan_config->out_of_channel_time =
 985                 cpu_to_le32(scan_timing[type].max_out_time);
 986         scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
 987         scan_config->dwell_active = scan_timing[type].dwell_active;
 988         scan_config->dwell_passive = scan_timing[type].dwell_passive;
 989         scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
 990         scan_config->dwell_extended = scan_timing[type].dwell_extended;
 991
 992         memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
 993
 994         scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
 995         scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
 996                                      IWL_CHANNEL_FLAG_ACCURATE_EBS |
 997                                      IWL_CHANNEL_FLAG_EBS_ADD |
 998                                      IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
 999
1000         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1001         for (i = 0; i < band->n_channels; i++, j++)
1002                 scan_config->channel_array[j] = band->channels[i].hw_value;
1003         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1004         for (i = 0; i < band->n_channels; i++, j++)
1005                 scan_config->channel_array[j] = band->channels[i].hw_value;
1006
1007         cmd.data[0] = scan_config;
1008         cmd.len[0] = cmd_size;
1009         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1010
1011         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1012
1013         ret = iwl_mvm_send_cmd(mvm, &cmd);
1014         if (!ret)
1015                 mvm->scan_type = type;
1016
1017         kfree(scan_config);
1018         return ret;
1019 }
1020
1021 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1022 {
1023         int i;
1024
1025         for (i = 0; i < mvm->max_scans; i++)
1026                 if (mvm->scan_uid_status[i] == status)
1027                         return i;
1028
1029         return -ENOENT;
1030 }
1031
1032 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1033                                     struct iwl_scan_req_umac *cmd,
1034                                     struct iwl_mvm_scan_params *params)
1035 {
1036         cmd->extended_dwell = scan_timing[params->type].dwell_extended;
1037         cmd->active_dwell = scan_timing[params->type].dwell_active;
1038         cmd->passive_dwell = scan_timing[params->type].dwell_passive;
1039         cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
1040         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
1041         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
1042         cmd->scan_priority =
1043                 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1044
1045         if (iwl_mvm_is_regular_scan(params))
1046                 cmd->ooc_priority =
1047                         iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1048         else
1049                 cmd->ooc_priority =
1050                         iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
1051 }
1052
1053 static void
1054 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1055                                struct ieee80211_channel **channels,
1056                                int n_channels, u32 ssid_bitmap,
1057                                struct iwl_scan_req_umac *cmd)
1058 {
1059         struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1060         int i;
1061
1062         for (i = 0; i < n_channels; i++) {
1063                 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1064                 channel_cfg[i].channel_num = channels[i]->hw_value;
1065                 channel_cfg[i].iter_count = 1;
1066                 channel_cfg[i].iter_interval = 0;
1067         }
1068 }
1069
1070 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1071                                    struct iwl_mvm_scan_params *params,
1072                                    struct ieee80211_vif *vif)
1073 {
1074         int flags = 0;
1075
1076         if (params->n_ssids == 0)
1077                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1078
1079         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1080                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1081
1082         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1083                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1084
1085         if (iwl_mvm_rrm_scan_needed(mvm))
1086                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1087
1088         if (params->pass_all)
1089                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1090         else
1091                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1092
1093         if (!iwl_mvm_is_regular_scan(params))
1094                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1095
1096 #ifdef CONFIG_IWLWIFI_DEBUGFS
1097         if (mvm->scan_iter_notif_enabled)
1098                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1099 #endif
1100
1101         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1102                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1103
1104         if (iwl_mvm_is_regular_scan(params) &&
1105             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1106             params->type != IWL_SCAN_TYPE_FRAGMENTED)
1107                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1108
1109         return flags;
1110 }
1111
1112 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1113                              struct iwl_mvm_scan_params *params,
1114                              int type)
1115 {
1116         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1117         struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1118                 sizeof(struct iwl_scan_channel_cfg_umac) *
1119                         mvm->fw->ucode_capa.n_scan_channels;
1120         int uid, i;
1121         u32 ssid_bitmap = 0;
1122
1123         lockdep_assert_held(&mvm->mutex);
1124
1125         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1126                 return -EINVAL;
1127
1128         uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1129         if (uid < 0)
1130                 return uid;
1131
1132         memset(cmd, 0, ksize(cmd));
1133
1134         iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1135
1136         mvm->scan_uid_status[uid] = type;
1137
1138         cmd->uid = cpu_to_le32(uid);
1139         cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params,
1140                                                                  vif));
1141
1142         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1143                 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1144
1145         if (iwl_mvm_scan_use_ebs(mvm, vif))
1146                 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1147                                      IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1148                                      IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1149
1150         cmd->n_channels = params->n_channels;
1151
1152         iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1153
1154         iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1155                                        params->n_channels, ssid_bitmap, cmd);
1156
1157         for (i = 0; i < params->n_scan_plans; i++) {
1158                 struct cfg80211_sched_scan_plan *scan_plan =
1159                         &params->scan_plans[i];
1160
1161                 sec_part->schedule[i].iter_count = scan_plan->iterations;
1162                 sec_part->schedule[i].interval =
1163                         cpu_to_le16(scan_plan->interval);
1164         }
1165
1166         /*
1167          * If the number of iterations of the last scan plan is set to
1168          * zero, it should run infinitely. However, this is not always the case.
1169          * For example, when regular scan is requested the driver sets one scan
1170          * plan with one iteration.
1171          */
1172         if (!sec_part->schedule[i - 1].iter_count)
1173                 sec_part->schedule[i - 1].iter_count = 0xff;
1174
1175         sec_part->delay = cpu_to_le16(params->delay);
1176         sec_part->preq = params->preq;
1177
1178         return 0;
1179 }
1180
1181 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1182 {
1183         return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1184 }
1185
1186 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1187 {
1188         /* This looks a bit arbitrary, but the idea is that if we run
1189          * out of possible simultaneous scans and the userspace is
1190          * trying to run a scan type that is already running, we
1191          * return -EBUSY.  But if the userspace wants to start a
1192          * different type of scan, we stop the opposite type to make
1193          * space for the new request.  The reason is backwards
1194          * compatibility with old wpa_supplicant that wouldn't stop a
1195          * scheduled scan before starting a normal scan.
1196          */
1197
1198         if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1199                 return 0;
1200
1201         /* Use a switch, even though this is a bitmask, so that more
1202          * than one bits set will fall in default and we will warn.
1203          */
1204         switch (type) {
1205         case IWL_MVM_SCAN_REGULAR:
1206                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1207                         return -EBUSY;
1208                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1209         case IWL_MVM_SCAN_SCHED:
1210                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1211                         return -EBUSY;
1212                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1213         case IWL_MVM_SCAN_NETDETECT:
1214                 /* No need to stop anything for net-detect since the
1215                  * firmware is restarted anyway.  This way, any sched
1216                  * scans that were running will be restarted when we
1217                  * resume.
1218                 */
1219                 return 0;
1220         default:
1221                 WARN_ON(1);
1222                 break;
1223         }
1224
1225         return -EIO;
1226 }
1227
1228 #define SCAN_TIMEOUT 20000
1229
1230 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
1231 {
1232         struct delayed_work *delayed_work = to_delayed_work(work);
1233         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1234                                            scan_timeout_dwork);
1235
1236         IWL_ERR(mvm, "regular scan timed out\n");
1237
1238         iwl_force_nmi(mvm->trans);
1239 }
1240
1241 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1242                            struct cfg80211_scan_request *req,
1243                            struct ieee80211_scan_ies *ies)
1244 {
1245         struct iwl_host_cmd hcmd = {
1246                 .len = { iwl_mvm_scan_size(mvm), },
1247                 .data = { mvm->scan_cmd, },
1248                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1249         };
1250         struct iwl_mvm_scan_params params = {};
1251         int ret;
1252         struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1253
1254         lockdep_assert_held(&mvm->mutex);
1255
1256         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1257                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1258                 return -EBUSY;
1259         }
1260
1261         ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1262         if (ret)
1263                 return ret;
1264
1265         /* we should have failed registration if scan_cmd was NULL */
1266         if (WARN_ON(!mvm->scan_cmd))
1267                 return -ENOMEM;
1268
1269         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1270                 return -ENOBUFS;
1271
1272         params.n_ssids = req->n_ssids;
1273         params.flags = req->flags;
1274         params.n_channels = req->n_channels;
1275         params.delay = 0;
1276         params.ssids = req->ssids;
1277         params.channels = req->channels;
1278         params.mac_addr = req->mac_addr;
1279         params.mac_addr_mask = req->mac_addr_mask;
1280         params.no_cck = req->no_cck;
1281         params.pass_all = true;
1282         params.n_match_sets = 0;
1283         params.match_sets = NULL;
1284
1285         params.scan_plans = &scan_plan;
1286         params.n_scan_plans = 1;
1287
1288         params.type =
1289                 iwl_mvm_get_scan_type(mvm,
1290                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1291
1292         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1293
1294         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1295                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1296                 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1297                                         IWL_MVM_SCAN_REGULAR);
1298         } else {
1299                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1300                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1301         }
1302
1303         if (ret)
1304                 return ret;
1305
1306         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1307         if (ret) {
1308                 /* If the scan failed, it usually means that the FW was unable
1309                  * to allocate the time events. Warn on it, but maybe we
1310                  * should try to send the command again with different params.
1311                  */
1312                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1313                 return ret;
1314         }
1315
1316         IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1317         mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1318         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1319
1320         queue_delayed_work(system_wq, &mvm->scan_timeout_dwork,
1321                            msecs_to_jiffies(SCAN_TIMEOUT));
1322
1323         return 0;
1324 }
1325
1326 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1327                              struct ieee80211_vif *vif,
1328                              struct cfg80211_sched_scan_request *req,
1329                              struct ieee80211_scan_ies *ies,
1330                              int type)
1331 {
1332         struct iwl_host_cmd hcmd = {
1333                 .len = { iwl_mvm_scan_size(mvm), },
1334                 .data = { mvm->scan_cmd, },
1335                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1336         };
1337         struct iwl_mvm_scan_params params = {};
1338         int ret;
1339
1340         lockdep_assert_held(&mvm->mutex);
1341
1342         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1343                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1344                 return -EBUSY;
1345         }
1346
1347         ret = iwl_mvm_check_running_scans(mvm, type);
1348         if (ret)
1349                 return ret;
1350
1351         /* we should have failed registration if scan_cmd was NULL */
1352         if (WARN_ON(!mvm->scan_cmd))
1353                 return -ENOMEM;
1354
1355         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1356                 return -ENOBUFS;
1357
1358         params.n_ssids = req->n_ssids;
1359         params.flags = req->flags;
1360         params.n_channels = req->n_channels;
1361         params.ssids = req->ssids;
1362         params.channels = req->channels;
1363         params.mac_addr = req->mac_addr;
1364         params.mac_addr_mask = req->mac_addr_mask;
1365         params.no_cck = false;
1366         params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
1367         params.n_match_sets = req->n_match_sets;
1368         params.match_sets = req->match_sets;
1369         if (!req->n_scan_plans)
1370                 return -EINVAL;
1371
1372         params.n_scan_plans = req->n_scan_plans;
1373         params.scan_plans = req->scan_plans;
1374
1375         params.type =
1376                 iwl_mvm_get_scan_type(mvm,
1377                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1378
1379         /* In theory, LMAC scans can handle a 32-bit delay, but since
1380          * waiting for over 18 hours to start the scan is a bit silly
1381          * and to keep it aligned with UMAC scans (which only support
1382          * 16-bit delays), trim it down to 16-bits.
1383          */
1384         if (req->delay > U16_MAX) {
1385                 IWL_DEBUG_SCAN(mvm,
1386                                "delay value is > 16-bits, set to max possible\n");
1387                 params.delay = U16_MAX;
1388         } else {
1389                 params.delay = req->delay;
1390         }
1391
1392         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1393         if (ret)
1394                 return ret;
1395
1396         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1397
1398         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1399                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1400                 ret = iwl_mvm_scan_umac(mvm, vif, &params, type);
1401         } else {
1402                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1403                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1404         }
1405
1406         if (ret)
1407                 return ret;
1408
1409         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1410         if (!ret) {
1411                 IWL_DEBUG_SCAN(mvm,
1412                                "Sched scan request was sent successfully\n");
1413                 mvm->scan_status |= type;
1414         } else {
1415                 /* If the scan failed, it usually means that the FW was unable
1416                  * to allocate the time events. Warn on it, but maybe we
1417                  * should try to send the command again with different params.
1418                  */
1419                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1420         }
1421
1422         return ret;
1423 }
1424
1425 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1426                                          struct iwl_rx_cmd_buffer *rxb)
1427 {
1428         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1429         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1430         u32 uid = __le32_to_cpu(notif->uid);
1431         bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1432
1433         if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1434                 return;
1435
1436         /* if the scan is already stopping, we don't need to notify mac80211 */
1437         if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1438                 struct cfg80211_scan_info info = {
1439                         .aborted = aborted,
1440                 };
1441
1442                 ieee80211_scan_completed(mvm->hw, &info);
1443                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1444                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1445         } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1446                 ieee80211_sched_scan_stopped(mvm->hw);
1447                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1448         }
1449
1450         mvm->scan_status &= ~mvm->scan_uid_status[uid];
1451         IWL_DEBUG_SCAN(mvm,
1452                        "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1453                        uid, mvm->scan_uid_status[uid],
1454                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1455                                 "completed" : "aborted",
1456                        iwl_mvm_ebs_status_str(notif->ebs_status));
1457         IWL_DEBUG_SCAN(mvm,
1458                        "Last line %d, Last iteration %d, Time from last iteration %d\n",
1459                        notif->last_schedule, notif->last_iter,
1460                        __le32_to_cpu(notif->time_from_last_iter));
1461
1462         if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1463             notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1464                 mvm->last_ebs_successful = false;
1465
1466         mvm->scan_uid_status[uid] = 0;
1467 }
1468
1469 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1470                                               struct iwl_rx_cmd_buffer *rxb)
1471 {
1472         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1473         struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1474         u8 buf[256];
1475
1476         IWL_DEBUG_SCAN(mvm,
1477                        "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1478                        notif->status, notif->scanned_channels,
1479                        iwl_mvm_dump_channel_list(notif->results,
1480                                                  notif->scanned_channels, buf,
1481                                                  sizeof(buf)));
1482
1483         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1484                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1485                 ieee80211_sched_scan_results(mvm->hw);
1486                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1487         }
1488 }
1489
1490 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1491 {
1492         struct iwl_umac_scan_abort cmd = {};
1493         int uid, ret;
1494
1495         lockdep_assert_held(&mvm->mutex);
1496
1497         /* We should always get a valid index here, because we already
1498          * checked that this type of scan was running in the generic
1499          * code.
1500          */
1501         uid = iwl_mvm_scan_uid_by_status(mvm, type);
1502         if (WARN_ON_ONCE(uid < 0))
1503                 return uid;
1504
1505         cmd.uid = cpu_to_le32(uid);
1506
1507         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1508
1509         ret = iwl_mvm_send_cmd_pdu(mvm,
1510                                    iwl_cmd_id(SCAN_ABORT_UMAC,
1511                                               IWL_ALWAYS_LONG_GROUP, 0),
1512                                    0, sizeof(cmd), &cmd);
1513         if (!ret)
1514                 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1515
1516         return ret;
1517 }
1518
1519 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1520 {
1521         struct iwl_notification_wait wait_scan_done;
1522         static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1523                                               SCAN_OFFLOAD_COMPLETE, };
1524         int ret;
1525
1526         lockdep_assert_held(&mvm->mutex);
1527
1528         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1529                                    scan_done_notif,
1530                                    ARRAY_SIZE(scan_done_notif),
1531                                    NULL, NULL);
1532
1533         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1534
1535         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1536                 ret = iwl_mvm_umac_scan_abort(mvm, type);
1537         else
1538                 ret = iwl_mvm_lmac_scan_abort(mvm);
1539
1540         if (ret) {
1541                 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1542                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1543                 return ret;
1544         }
1545
1546         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1547
1548         return ret;
1549 }
1550
1551 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1552 {
1553         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1554                 return sizeof(struct iwl_scan_req_umac) +
1555                         sizeof(struct iwl_scan_channel_cfg_umac) *
1556                                 mvm->fw->ucode_capa.n_scan_channels +
1557                         sizeof(struct iwl_scan_req_umac_tail);
1558
1559         return sizeof(struct iwl_scan_req_lmac) +
1560                 sizeof(struct iwl_scan_channel_cfg_lmac) *
1561                 mvm->fw->ucode_capa.n_scan_channels +
1562                 sizeof(struct iwl_scan_probe_req);
1563 }
1564
1565 /*
1566  * This function is used in nic restart flow, to inform mac80211 about scans
1567  * that was aborted by restart flow or by an assert.
1568  */
1569 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1570 {
1571         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1572                 int uid, i;
1573
1574                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1575                 if (uid >= 0) {
1576                         struct cfg80211_scan_info info = {
1577                                 .aborted = true,
1578                         };
1579
1580                         ieee80211_scan_completed(mvm->hw, &info);
1581                         mvm->scan_uid_status[uid] = 0;
1582                 }
1583                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1584                 if (uid >= 0 && !mvm->restart_fw) {
1585                         ieee80211_sched_scan_stopped(mvm->hw);
1586                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1587                         mvm->scan_uid_status[uid] = 0;
1588                 }
1589
1590                 /* We shouldn't have any UIDs still set.  Loop over all the
1591                  * UIDs to make sure there's nothing left there and warn if
1592                  * any is found.
1593                  */
1594                 for (i = 0; i < mvm->max_scans; i++) {
1595                         if (WARN_ONCE(mvm->scan_uid_status[i],
1596                                       "UMAC scan UID %d status was not cleaned\n",
1597                                       i))
1598                                 mvm->scan_uid_status[i] = 0;
1599                 }
1600         } else {
1601                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
1602                         struct cfg80211_scan_info info = {
1603                                 .aborted = true,
1604                         };
1605
1606                         ieee80211_scan_completed(mvm->hw, &info);
1607                 }
1608
1609                 /* Sched scan will be restarted by mac80211 in
1610                  * restart_hw, so do not report if FW is about to be
1611                  * restarted.
1612                  */
1613                 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
1614                     !mvm->restart_fw) {
1615                         ieee80211_sched_scan_stopped(mvm->hw);
1616                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1617                 }
1618         }
1619 }
1620
1621 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1622 {
1623         int ret;
1624
1625         if (!(mvm->scan_status & type))
1626                 return 0;
1627
1628         if (iwl_mvm_is_radio_killed(mvm)) {
1629                 ret = 0;
1630                 goto out;
1631         }
1632
1633         ret = iwl_mvm_scan_stop_wait(mvm, type);
1634         if (!ret)
1635                 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1636 out:
1637         /* Clear the scan status so the next scan requests will
1638          * succeed and mark the scan as stopping, so that the Rx
1639          * handler doesn't do anything, as the scan was stopped from
1640          * above.
1641          */
1642         mvm->scan_status &= ~type;
1643
1644         if (type == IWL_MVM_SCAN_REGULAR) {
1645                 /* Since the rx handler won't do anything now, we have
1646                  * to release the scan reference here.
1647                  */
1648                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1649                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1650                 if (notify) {
1651                         struct cfg80211_scan_info info = {
1652                                 .aborted = true,
1653                         };
1654
1655                         ieee80211_scan_completed(mvm->hw, &info);
1656                 }
1657         } else if (notify) {
1658                 ieee80211_sched_scan_stopped(mvm->hw);
1659                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1660         }
1661
1662         return ret;
1663 }