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

   1 /******************************************************************************
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  10  * Copyright(c) 2016 Intel Deutschland GmbH
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  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 Intel Deutschland GmbH
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  66  *****************************************************************************/
  67
  68 #include <linux/etherdevice.h>
  69 #include <net/mac80211.h>
  70
  71 #include "mvm.h"
  72 #include "fw-api-scan.h"
  73
  74 #define IWL_DENSE_EBS_SCAN_RATIO 5
  75 #define IWL_SPARSE_EBS_SCAN_RATIO 1
  76
  77 enum iwl_mvm_traffic_load {
  78         IWL_MVM_TRAFFIC_LOW,
  79         IWL_MVM_TRAFFIC_MEDIUM,
  80         IWL_MVM_TRAFFIC_HIGH,
  81 };
  82
  83 struct iwl_mvm_scan_timing_params {
  84         u32 dwell_active;
  85         u32 dwell_passive;
  86         u32 dwell_fragmented;
  87         u32 dwell_extended;
  88         u32 suspend_time;
  89         u32 max_out_time;
  90 };
  91
  92 static struct iwl_mvm_scan_timing_params scan_timing[] = {
  93         [IWL_SCAN_TYPE_UNASSOC] = {
  94                 .dwell_active = 10,
  95                 .dwell_passive = 110,
  96                 .dwell_fragmented = 44,
  97                 .dwell_extended = 90,
  98                 .suspend_time = 0,
  99                 .max_out_time = 0,
 100         },
 101         [IWL_SCAN_TYPE_WILD] = {
 102                 .dwell_active = 10,
 103                 .dwell_passive = 110,
 104                 .dwell_fragmented = 44,
 105                 .dwell_extended = 90,
 106                 .suspend_time = 30,
 107                 .max_out_time = 120,
 108         },
 109         [IWL_SCAN_TYPE_MILD] = {
 110                 .dwell_active = 10,
 111                 .dwell_passive = 110,
 112                 .dwell_fragmented = 44,
 113                 .dwell_extended = 90,
 114                 .suspend_time = 120,
 115                 .max_out_time = 120,
 116         },
 117         [IWL_SCAN_TYPE_FRAGMENTED] = {
 118                 .dwell_active = 10,
 119                 .dwell_passive = 110,
 120                 .dwell_fragmented = 44,
 121                 .suspend_time = 95,
 122                 .max_out_time = 44,
 123         },
 124 };
 125
 126 struct iwl_mvm_scan_params {
 127         enum iwl_mvm_scan_type type;
 128         u32 n_channels;
 129         u16 delay;
 130         int n_ssids;
 131         struct cfg80211_ssid *ssids;
 132         struct ieee80211_channel **channels;
 133         u32 flags;
 134         u8 *mac_addr;
 135         u8 *mac_addr_mask;
 136         bool no_cck;
 137         bool pass_all;
 138         int n_match_sets;
 139         struct iwl_scan_probe_req preq;
 140         struct cfg80211_match_set *match_sets;
 141         int n_scan_plans;
 142         struct cfg80211_sched_scan_plan *scan_plans;
 143 };
 144
 145 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
 146 {
 147         if (mvm->scan_rx_ant != ANT_NONE)
 148                 return mvm->scan_rx_ant;
 149         return iwl_mvm_get_valid_rx_ant(mvm);
 150 }
 151
 152 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 153 {
 154         u16 rx_chain;
 155         u8 rx_ant;
 156
 157         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 158         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 159         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 160         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 161         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 162         return cpu_to_le16(rx_chain);
 163 }
 164
 165 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
 166 {
 167         if (band == IEEE80211_BAND_2GHZ)
 168                 return cpu_to_le32(PHY_BAND_24);
 169         else
 170                 return cpu_to_le32(PHY_BAND_5);
 171 }
 172
 173 static inline __le32
 174 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
 175                           bool no_cck)
 176 {
 177         u32 tx_ant;
 178
 179         mvm->scan_last_antenna_idx =
 180                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 181                                      mvm->scan_last_antenna_idx);
 182         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 183
 184         if (band == IEEE80211_BAND_2GHZ && !no_cck)
 185                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 186                                    tx_ant);
 187         else
 188                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 189 }
 190
 191 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 192                                             struct ieee80211_vif *vif)
 193 {
 194         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 195         int *global_cnt = data;
 196
 197         if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 198             mvmvif->phy_ctxt->id < MAX_PHYS)
 199                 *global_cnt += 1;
 200 }
 201
 202 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
 203 {
 204         return IWL_MVM_TRAFFIC_LOW;
 205 }
 206
 207 static enum
 208 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
 209 {
 210         int global_cnt = 0;
 211         enum iwl_mvm_traffic_load load;
 212         bool low_latency;
 213
 214         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 215                                             IEEE80211_IFACE_ITER_NORMAL,
 216                                             iwl_mvm_scan_condition_iterator,
 217                                             &global_cnt);
 218         if (!global_cnt)
 219                 return IWL_SCAN_TYPE_UNASSOC;
 220
 221         load = iwl_mvm_get_traffic_load(mvm);
 222         low_latency = iwl_mvm_low_latency(mvm);
 223
 224         if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
 225             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
 226                 return IWL_SCAN_TYPE_FRAGMENTED;
 227
 228         if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
 229                 return IWL_SCAN_TYPE_MILD;
 230
 231         return IWL_SCAN_TYPE_WILD;
 232 }
 233
 234 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 235 {
 236         /* require rrm scan whenever the fw supports it */
 237         return fw_has_capa(&mvm->fw->ucode_capa,
 238                            IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
 239 }
 240
 241 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
 242 {
 243         int max_probe_len;
 244
 245         max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 246
 247         /* we create the 802.11 header and SSID element */
 248         max_probe_len -= 24 + 2;
 249
 250         /* DS parameter set element is added on 2.4GHZ band if required */
 251         if (iwl_mvm_rrm_scan_needed(mvm))
 252                 max_probe_len -= 3;
 253
 254         return max_probe_len;
 255 }
 256
 257 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 258 {
 259         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
 260
 261         /* TODO: [BUG] This function should return the maximum allowed size of
 262          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 263          * in the same command. So the correct implementation of this function
 264          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 265          * command has only 512 bytes and it would leave us with about 240
 266          * bytes for scan IEs, which is clearly not enough. So meanwhile
 267          * we will report an incorrect value. This may result in a failure to
 268          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 269          * functions with -ENOBUFS, if a large enough probe will be provided.
 270          */
 271         return max_ie_len;
 272 }
 273
 274 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res,
 275                                      int num_res, u8 *buf, size_t buf_size)
 276 {
 277         int i;
 278         u8 *pos = buf, *end = buf + buf_size;
 279
 280         for (i = 0; pos < end && i < num_res; i++)
 281                 pos += snprintf(pos, end - pos, " %u", res[i].channel);
 282
 283         /* terminate the string in case the buffer was too short */
 284         *(buf + buf_size - 1) = '\0';
 285
 286         return buf;
 287 }
 288
 289 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 290                                               struct iwl_rx_cmd_buffer *rxb)
 291 {
 292         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 293         struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
 294         u8 buf[256];
 295
 296         IWL_DEBUG_SCAN(mvm,
 297                        "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n",
 298                        notif->status, notif->scanned_channels,
 299                        iwl_mvm_dump_channel_list(notif->results,
 300                                                  notif->scanned_channels, buf,
 301                                                  sizeof(buf)));
 302
 303         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
 304                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
 305                 ieee80211_sched_scan_results(mvm->hw);
 306                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 307         }
 308 }
 309
 310 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
 311                                  struct iwl_rx_cmd_buffer *rxb)
 312 {
 313         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 314         ieee80211_sched_scan_results(mvm->hw);
 315 }
 316
 317 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
 318 {
 319         switch (status) {
 320         case IWL_SCAN_EBS_SUCCESS:
 321                 return "successful";
 322         case IWL_SCAN_EBS_INACTIVE:
 323                 return "inactive";
 324         case IWL_SCAN_EBS_FAILED:
 325         case IWL_SCAN_EBS_CHAN_NOT_FOUND:
 326         default:
 327                 return "failed";
 328         }
 329 }
 330
 331 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
 332                                          struct iwl_rx_cmd_buffer *rxb)
 333 {
 334         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 335         struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
 336         bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 337
 338         /* If this happens, the firmware has mistakenly sent an LMAC
 339          * notification during UMAC scans -- warn and ignore it.
 340          */
 341         if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
 342                                      IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
 343                 return;
 344
 345         /* scan status must be locked for proper checking */
 346         lockdep_assert_held(&mvm->mutex);
 347
 348         /* We first check if we were stopping a scan, in which case we
 349          * just clear the stopping flag.  Then we check if it was a
 350          * firmware initiated stop, in which case we need to inform
 351          * mac80211.
 352          * Note that we can have a stopping and a running scan
 353          * simultaneously, but we can't have two different types of
 354          * scans stopping or running at the same time (since LMAC
 355          * doesn't support it).
 356          */
 357
 358         if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
 359                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
 360
 361                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 362                                aborted ? "aborted" : "completed",
 363                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 364                 IWL_DEBUG_SCAN(mvm,
 365                                "Last line %d, Last iteration %d, Time after last iteration %d\n",
 366                                scan_notif->last_schedule_line,
 367                                scan_notif->last_schedule_iteration,
 368                                __le32_to_cpu(scan_notif->time_after_last_iter));
 369
 370                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
 371         } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
 372                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
 373                                aborted ? "aborted" : "completed",
 374                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 375
 376                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
 377         } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
 378                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
 379
 380                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 381                                aborted ? "aborted" : "completed",
 382                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 383                 IWL_DEBUG_SCAN(mvm,
 384                                "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
 385                                scan_notif->last_schedule_line,
 386                                scan_notif->last_schedule_iteration,
 387                                __le32_to_cpu(scan_notif->time_after_last_iter));
 388
 389                 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
 390                 ieee80211_sched_scan_stopped(mvm->hw);
 391                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 392         } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
 393                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
 394                                aborted ? "aborted" : "completed",
 395                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 396
 397                 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
 398                 ieee80211_scan_completed(mvm->hw,
 399                                 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 400                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 401         }
 402
 403         mvm->last_ebs_successful =
 404                         scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
 405                         scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
 406 }
 407
 408 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 409 {
 410         int i;
 411
 412         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 413                 if (!ssid_list[i].len)
 414                         break;
 415                 if (ssid_list[i].len == ssid_len &&
 416                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 417                         return i;
 418         }
 419         return -1;
 420 }
 421
 422 /* We insert the SSIDs in an inverted order, because the FW will
 423  * invert it back.
 424  */
 425 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
 426                                  struct iwl_ssid_ie *ssids,
 427                                  u32 *ssid_bitmap)
 428 {
 429         int i, j;
 430         int index;
 431
 432         /*
 433          * copy SSIDs from match list.
 434          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 435          * config match list.
 436          */
 437         for (i = 0, j = params->n_match_sets - 1;
 438              j >= 0 && i < PROBE_OPTION_MAX;
 439              i++, j--) {
 440                 /* skip empty SSID matchsets */
 441                 if (!params->match_sets[j].ssid.ssid_len)
 442                         continue;
 443                 ssids[i].id = WLAN_EID_SSID;
 444                 ssids[i].len = params->match_sets[j].ssid.ssid_len;
 445                 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
 446                        ssids[i].len);
 447         }
 448
 449         /* add SSIDs from scan SSID list */
 450         *ssid_bitmap = 0;
 451         for (j = params->n_ssids - 1;
 452              j >= 0 && i < PROBE_OPTION_MAX;
 453              i++, j--) {
 454                 index = iwl_ssid_exist(params->ssids[j].ssid,
 455                                        params->ssids[j].ssid_len,
 456                                        ssids);
 457                 if (index < 0) {
 458                         ssids[i].id = WLAN_EID_SSID;
 459                         ssids[i].len = params->ssids[j].ssid_len;
 460                         memcpy(ssids[i].ssid, params->ssids[j].ssid,
 461                                ssids[i].len);
 462                         *ssid_bitmap |= BIT(i);
 463                 } else {
 464                         *ssid_bitmap |= BIT(index);
 465                 }
 466         }
 467 }
 468
 469 static int
 470 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 471                                    struct cfg80211_sched_scan_request *req)
 472 {
 473         struct iwl_scan_offload_profile *profile;
 474         struct iwl_scan_offload_profile_cfg *profile_cfg;
 475         struct iwl_scan_offload_blacklist *blacklist;
 476         struct iwl_host_cmd cmd = {
 477                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 478                 .len[1] = sizeof(*profile_cfg),
 479                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 480                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 481         };
 482         int blacklist_len;
 483         int i;
 484         int ret;
 485
 486         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 487                 return -EIO;
 488
 489         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 490                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 491         else
 492                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 493
 494         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 495         if (!blacklist)
 496                 return -ENOMEM;
 497
 498         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 499         if (!profile_cfg) {
 500                 ret = -ENOMEM;
 501                 goto free_blacklist;
 502         }
 503
 504         cmd.data[0] = blacklist;
 505         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 506         cmd.data[1] = profile_cfg;
 507
 508         /* No blacklist configuration */
 509
 510         profile_cfg->num_profiles = req->n_match_sets;
 511         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 512         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 513         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 514         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 515                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 516
 517         for (i = 0; i < req->n_match_sets; i++) {
 518                 profile = &profile_cfg->profiles[i];
 519                 profile->ssid_index = i;
 520                 /* Support any cipher and auth algorithm */
 521                 profile->unicast_cipher = 0xff;
 522                 profile->auth_alg = 0xff;
 523                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 524                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 525                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 526         }
 527
 528         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 529
 530         ret = iwl_mvm_send_cmd(mvm, &cmd);
 531         kfree(profile_cfg);
 532 free_blacklist:
 533         kfree(blacklist);
 534
 535         return ret;
 536 }
 537
 538 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
 539                                   struct cfg80211_sched_scan_request *req)
 540 {
 541         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 542                 IWL_DEBUG_SCAN(mvm,
 543                                "Sending scheduled scan with filtering, n_match_sets %d\n",
 544                                req->n_match_sets);
 545                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 546                 return false;
 547         }
 548
 549         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
 550
 551         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 552         return true;
 553 }
 554
 555 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
 556 {
 557         int ret;
 558         struct iwl_host_cmd cmd = {
 559                 .id = SCAN_OFFLOAD_ABORT_CMD,
 560         };
 561         u32 status;
 562
 563         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
 564         if (ret)
 565                 return ret;
 566
 567         if (status != CAN_ABORT_STATUS) {
 568                 /*
 569                  * The scan abort will return 1 for success or
 570                  * 2 for "failure".  A failure condition can be
 571                  * due to simply not being in an active scan which
 572                  * can occur if we send the scan abort before the
 573                  * microcode has notified us that a scan is completed.
 574                  */
 575                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
 576                 ret = -ENOENT;
 577         }
 578
 579         return ret;
 580 }
 581
 582 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
 583                                      struct iwl_scan_req_tx_cmd *tx_cmd,
 584                                      bool no_cck)
 585 {
 586         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 587                                          TX_CMD_FLG_BT_DIS);
 588         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 589                                                            IEEE80211_BAND_2GHZ,
 590                                                            no_cck);
 591         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
 592
 593         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 594                                          TX_CMD_FLG_BT_DIS);
 595         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 596                                                            IEEE80211_BAND_5GHZ,
 597                                                            no_cck);
 598         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
 599 }
 600
 601 static void
 602 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
 603                                struct ieee80211_channel **channels,
 604                                int n_channels, u32 ssid_bitmap,
 605                                struct iwl_scan_req_lmac *cmd)
 606 {
 607         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
 608         int i;
 609
 610         for (i = 0; i < n_channels; i++) {
 611                 channel_cfg[i].channel_num =
 612                         cpu_to_le16(channels[i]->hw_value);
 613                 channel_cfg[i].iter_count = cpu_to_le16(1);
 614                 channel_cfg[i].iter_interval = 0;
 615                 channel_cfg[i].flags =
 616                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
 617                                     ssid_bitmap);
 618         }
 619 }
 620
 621 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 622                                            size_t len, u8 *const pos)
 623 {
 624         static const u8 before_ds_params[] = {
 625                         WLAN_EID_SSID,
 626                         WLAN_EID_SUPP_RATES,
 627                         WLAN_EID_REQUEST,
 628                         WLAN_EID_EXT_SUPP_RATES,
 629         };
 630         size_t offs;
 631         u8 *newpos = pos;
 632
 633         if (!iwl_mvm_rrm_scan_needed(mvm)) {
 634                 memcpy(newpos, ies, len);
 635                 return newpos + len;
 636         }
 637
 638         offs = ieee80211_ie_split(ies, len,
 639                                   before_ds_params,
 640                                   ARRAY_SIZE(before_ds_params),
 641                                   0);
 642
 643         memcpy(newpos, ies, offs);
 644         newpos += offs;
 645
 646         /* Add a placeholder for DS Parameter Set element */
 647         *newpos++ = WLAN_EID_DS_PARAMS;
 648         *newpos++ = 1;
 649         *newpos++ = 0;
 650
 651         memcpy(newpos, ies + offs, len - offs);
 652         newpos += len - offs;
 653
 654         return newpos;
 655 }
 656
 657 static void
 658 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 659                          struct ieee80211_scan_ies *ies,
 660                          struct iwl_mvm_scan_params *params)
 661 {
 662         struct ieee80211_mgmt *frame = (void *)params->preq.buf;
 663         u8 *pos, *newpos;
 664         const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
 665                 params->mac_addr : NULL;
 666
 667         /*
 668          * Unfortunately, right now the offload scan doesn't support randomising
 669          * within the firmware, so until the firmware API is ready we implement
 670          * it in the driver. This means that the scan iterations won't really be
 671          * random, only when it's restarted, but at least that helps a bit.
 672          */
 673         if (mac_addr)
 674                 get_random_mask_addr(frame->sa, mac_addr,
 675                                      params->mac_addr_mask);
 676         else
 677                 memcpy(frame->sa, vif->addr, ETH_ALEN);
 678
 679         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 680         eth_broadcast_addr(frame->da);
 681         eth_broadcast_addr(frame->bssid);
 682         frame->seq_ctrl = 0;
 683
 684         pos = frame->u.probe_req.variable;
 685         *pos++ = WLAN_EID_SSID;
 686         *pos++ = 0;
 687
 688         params->preq.mac_header.offset = 0;
 689         params->preq.mac_header.len = cpu_to_le16(24 + 2);
 690
 691         /* Insert ds parameter set element on 2.4 GHz band */
 692         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
 693                                                  ies->ies[IEEE80211_BAND_2GHZ],
 694                                                  ies->len[IEEE80211_BAND_2GHZ],
 695                                                  pos);
 696         params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
 697         params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
 698         pos = newpos;
 699
 700         memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
 701                ies->len[IEEE80211_BAND_5GHZ]);
 702         params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
 703         params->preq.band_data[1].len =
 704                 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
 705         pos += ies->len[IEEE80211_BAND_5GHZ];
 706
 707         memcpy(pos, ies->common_ies, ies->common_ie_len);
 708         params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
 709         params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
 710 }
 711
 712 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm,
 713                                     enum iwl_scan_priority_ext prio)
 714 {
 715         if (fw_has_api(&mvm->fw->ucode_capa,
 716                        IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY))
 717                 return cpu_to_le32(prio);
 718
 719         if (prio <= IWL_SCAN_PRIORITY_EXT_2)
 720                 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
 721
 722         if (prio <= IWL_SCAN_PRIORITY_EXT_4)
 723                 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM);
 724
 725         return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
 726 }
 727
 728 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
 729                                     struct iwl_scan_req_lmac *cmd,
 730                                     struct iwl_mvm_scan_params *params)
 731 {
 732         cmd->active_dwell = scan_timing[params->type].dwell_active;
 733         cmd->passive_dwell = scan_timing[params->type].dwell_passive;
 734         cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
 735         cmd->extended_dwell = scan_timing[params->type].dwell_extended;
 736         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
 737         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
 738         cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
 739 }
 740
 741 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
 742                                      struct ieee80211_scan_ies *ies,
 743                                      int n_channels)
 744 {
 745         return ((n_ssids <= PROBE_OPTION_MAX) &&
 746                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
 747                 (ies->common_ie_len +
 748                  ies->len[NL80211_BAND_2GHZ] +
 749                  ies->len[NL80211_BAND_5GHZ] <=
 750                  iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
 751 }
 752
 753 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 754                                         struct ieee80211_vif *vif)
 755 {
 756         const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
 757
 758         /* We can only use EBS if:
 759          *      1. the feature is supported;
 760          *      2. the last EBS was successful;
 761          *      3. if only single scan, the single scan EBS API is supported;
 762          *      4. it's not a p2p find operation.
 763          */
 764         return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 765                 mvm->last_ebs_successful &&
 766                 vif->type != NL80211_IFTYPE_P2P_DEVICE);
 767 }
 768
 769 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
 770 {
 771         return params->n_scan_plans == 1 &&
 772                 params->scan_plans[0].iterations == 1;
 773 }
 774
 775 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 776                                    struct iwl_mvm_scan_params *params,
 777                                    struct ieee80211_vif *vif)
 778 {
 779         int flags = 0;
 780
 781         if (params->n_ssids == 0)
 782                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
 783
 784         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
 785                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
 786
 787         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
 788                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 789
 790         if (iwl_mvm_rrm_scan_needed(mvm))
 791                 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 792
 793         if (params->pass_all)
 794                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
 795         else
 796                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
 797
 798 #ifdef CONFIG_IWLWIFI_DEBUGFS
 799         if (mvm->scan_iter_notif_enabled)
 800                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 801 #endif
 802
 803         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
 804                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 805
 806         if (iwl_mvm_is_regular_scan(params) &&
 807             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 808             params->type != IWL_SCAN_TYPE_FRAGMENTED)
 809                 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
 810
 811         return flags;
 812 }
 813
 814 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 815                              struct iwl_mvm_scan_params *params)
 816 {
 817         struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
 818         struct iwl_scan_probe_req *preq =
 819                 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
 820                          mvm->fw->ucode_capa.n_scan_channels);
 821         u32 ssid_bitmap = 0;
 822         int i;
 823
 824         lockdep_assert_held(&mvm->mutex);
 825
 826         memset(cmd, 0, ksize(cmd));
 827
 828         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
 829                 return -EINVAL;
 830
 831         iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
 832
 833         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
 834         cmd->iter_num = cpu_to_le32(1);
 835         cmd->n_channels = (u8)params->n_channels;
 836
 837         cmd->delay = cpu_to_le32(params->delay);
 838
 839         cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
 840                                                               vif));
 841
 842         cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
 843         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 844                                         MAC_FILTER_IN_BEACON);
 845         iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
 846         iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
 847
 848         /* this API uses bits 1-20 instead of 0-19 */
 849         ssid_bitmap <<= 1;
 850
 851         for (i = 0; i < params->n_scan_plans; i++) {
 852                 struct cfg80211_sched_scan_plan *scan_plan =
 853                         &params->scan_plans[i];
 854
 855                 cmd->schedule[i].delay =
 856                         cpu_to_le16(scan_plan->interval);
 857                 cmd->schedule[i].iterations = scan_plan->iterations;
 858                 cmd->schedule[i].full_scan_mul = 1;
 859         }
 860
 861         /*
 862          * If the number of iterations of the last scan plan is set to
 863          * zero, it should run infinitely. However, this is not always the case.
 864          * For example, when regular scan is requested the driver sets one scan
 865          * plan with one iteration.
 866          */
 867         if (!cmd->schedule[i - 1].iterations)
 868                 cmd->schedule[i - 1].iterations = 0xff;
 869
 870         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
 871                 cmd->channel_opt[0].flags =
 872                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 873                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 874                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 875                 cmd->channel_opt[0].non_ebs_ratio =
 876                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
 877                 cmd->channel_opt[1].flags =
 878                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 879                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 880                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 881                 cmd->channel_opt[1].non_ebs_ratio =
 882                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
 883         }
 884
 885         iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
 886                                        params->n_channels, ssid_bitmap, cmd);
 887
 888         *preq = params->preq;
 889
 890         return 0;
 891 }
 892
 893 static int rate_to_scan_rate_flag(unsigned int rate)
 894 {
 895         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
 896                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
 897                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
 898                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
 899                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
 900                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
 901                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
 902                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
 903                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
 904                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
 905                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
 906                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
 907                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
 908         };
 909
 910         return rate_to_scan_rate[rate];
 911 }
 912
 913 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
 914 {
 915         struct ieee80211_supported_band *band;
 916         unsigned int rates = 0;
 917         int i;
 918
 919         band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 920         for (i = 0; i < band->n_bitrates; i++)
 921                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 922         band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 923         for (i = 0; i < band->n_bitrates; i++)
 924                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 925
 926         /* Set both basic rates and supported rates */
 927         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
 928
 929         return cpu_to_le32(rates);
 930 }
 931
 932 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
 933 {
 934         struct iwl_scan_config *scan_config;
 935         struct ieee80211_supported_band *band;
 936         int num_channels =
 937                 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
 938                 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
 939         int ret, i, j = 0, cmd_size;
 940         struct iwl_host_cmd cmd = {
 941                 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
 942         };
 943         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
 944
 945         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
 946                 return -ENOBUFS;
 947
 948         if (type == mvm->scan_type) {
 949                 IWL_DEBUG_SCAN(mvm,
 950                                "Ignoring UMAC scan config of the same type\n");
 951                 return 0;
 952         }
 953
 954         cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
 955
 956         scan_config = kzalloc(cmd_size, GFP_KERNEL);
 957         if (!scan_config)
 958                 return -ENOMEM;
 959
 960         scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
 961                                          SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
 962                                          SCAN_CONFIG_FLAG_SET_TX_CHAINS |
 963                                          SCAN_CONFIG_FLAG_SET_RX_CHAINS |
 964                                          SCAN_CONFIG_FLAG_SET_ALL_TIMES |
 965                                          SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
 966                                          SCAN_CONFIG_FLAG_SET_MAC_ADDR |
 967                                          SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
 968                                          SCAN_CONFIG_N_CHANNELS(num_channels) |
 969                                          (type == IWL_SCAN_TYPE_FRAGMENTED ?
 970                                           SCAN_CONFIG_FLAG_SET_FRAGMENTED :
 971                                           SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED));
 972         scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
 973         scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
 974         scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
 975         scan_config->out_of_channel_time =
 976                 cpu_to_le32(scan_timing[type].max_out_time);
 977         scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
 978         scan_config->dwell_active = scan_timing[type].dwell_active;
 979         scan_config->dwell_passive = scan_timing[type].dwell_passive;
 980         scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented;
 981         scan_config->dwell_extended = scan_timing[type].dwell_extended;
 982
 983         memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
 984
 985         scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
 986         scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
 987                                      IWL_CHANNEL_FLAG_ACCURATE_EBS |
 988                                      IWL_CHANNEL_FLAG_EBS_ADD |
 989                                      IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
 990
 991         band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
 992         for (i = 0; i < band->n_channels; i++, j++)
 993                 scan_config->channel_array[j] = band->channels[i].hw_value;
 994         band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
 995         for (i = 0; i < band->n_channels; i++, j++)
 996                 scan_config->channel_array[j] = band->channels[i].hw_value;
 997
 998         cmd.data[0] = scan_config;
 999         cmd.len[0] = cmd_size;
1000         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1001
1002         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1003
1004         ret = iwl_mvm_send_cmd(mvm, &cmd);
1005         if (!ret)
1006                 mvm->scan_type = type;
1007
1008         kfree(scan_config);
1009         return ret;
1010 }
1011
1012 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1013 {
1014         int i;
1015
1016         for (i = 0; i < mvm->max_scans; i++)
1017                 if (mvm->scan_uid_status[i] == status)
1018                         return i;
1019
1020         return -ENOENT;
1021 }
1022
1023 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1024                                     struct iwl_scan_req_umac *cmd,
1025                                     struct iwl_mvm_scan_params *params)
1026 {
1027         cmd->extended_dwell = scan_timing[params->type].dwell_extended;
1028         cmd->active_dwell = scan_timing[params->type].dwell_active;
1029         cmd->passive_dwell = scan_timing[params->type].dwell_passive;
1030         cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented;
1031         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
1032         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
1033         cmd->scan_priority =
1034                 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1035
1036         if (iwl_mvm_is_regular_scan(params))
1037                 cmd->ooc_priority =
1038                         iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6);
1039         else
1040                 cmd->ooc_priority =
1041                         iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2);
1042 }
1043
1044 static void
1045 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1046                                struct ieee80211_channel **channels,
1047                                int n_channels, u32 ssid_bitmap,
1048                                struct iwl_scan_req_umac *cmd)
1049 {
1050         struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1051         int i;
1052
1053         for (i = 0; i < n_channels; i++) {
1054                 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1055                 channel_cfg[i].channel_num = channels[i]->hw_value;
1056                 channel_cfg[i].iter_count = 1;
1057                 channel_cfg[i].iter_interval = 0;
1058         }
1059 }
1060
1061 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1062                                    struct iwl_mvm_scan_params *params,
1063                                    struct ieee80211_vif *vif)
1064 {
1065         int flags = 0;
1066
1067         if (params->n_ssids == 0)
1068                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1069
1070         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1071                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1072
1073         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
1074                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1075
1076         if (iwl_mvm_rrm_scan_needed(mvm))
1077                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1078
1079         if (params->pass_all)
1080                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1081         else
1082                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1083
1084         if (!iwl_mvm_is_regular_scan(params))
1085                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1086
1087 #ifdef CONFIG_IWLWIFI_DEBUGFS
1088         if (mvm->scan_iter_notif_enabled)
1089                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1090 #endif
1091
1092         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1093                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1094
1095         if (iwl_mvm_is_regular_scan(params) &&
1096             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1097             params->type != IWL_SCAN_TYPE_FRAGMENTED)
1098                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1099
1100         return flags;
1101 }
1102
1103 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1104                              struct iwl_mvm_scan_params *params,
1105                              int type)
1106 {
1107         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1108         struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1109                 sizeof(struct iwl_scan_channel_cfg_umac) *
1110                         mvm->fw->ucode_capa.n_scan_channels;
1111         int uid, i;
1112         u32 ssid_bitmap = 0;
1113
1114         lockdep_assert_held(&mvm->mutex);
1115
1116         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1117                 return -EINVAL;
1118
1119         uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1120         if (uid < 0)
1121                 return uid;
1122
1123         memset(cmd, 0, ksize(cmd));
1124
1125         iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1126
1127         mvm->scan_uid_status[uid] = type;
1128
1129         cmd->uid = cpu_to_le32(uid);
1130         cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params,
1131                                                                  vif));
1132
1133         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1134                 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1135
1136         if (iwl_mvm_scan_use_ebs(mvm, vif))
1137                 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1138                                      IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1139                                      IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1140
1141         cmd->n_channels = params->n_channels;
1142
1143         iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1144
1145         iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1146                                        params->n_channels, ssid_bitmap, cmd);
1147
1148         for (i = 0; i < params->n_scan_plans; i++) {
1149                 struct cfg80211_sched_scan_plan *scan_plan =
1150                         &params->scan_plans[i];
1151
1152                 sec_part->schedule[i].iter_count = scan_plan->iterations;
1153                 sec_part->schedule[i].interval =
1154                         cpu_to_le16(scan_plan->interval);
1155         }
1156
1157         /*
1158          * If the number of iterations of the last scan plan is set to
1159          * zero, it should run infinitely. However, this is not always the case.
1160          * For example, when regular scan is requested the driver sets one scan
1161          * plan with one iteration.
1162          */
1163         if (!sec_part->schedule[i - 1].iter_count)
1164                 sec_part->schedule[i - 1].iter_count = 0xff;
1165
1166         sec_part->delay = cpu_to_le16(params->delay);
1167         sec_part->preq = params->preq;
1168
1169         return 0;
1170 }
1171
1172 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1173 {
1174         return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1175 }
1176
1177 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1178 {
1179         /* This looks a bit arbitrary, but the idea is that if we run
1180          * out of possible simultaneous scans and the userspace is
1181          * trying to run a scan type that is already running, we
1182          * return -EBUSY.  But if the userspace wants to start a
1183          * different type of scan, we stop the opposite type to make
1184          * space for the new request.  The reason is backwards
1185          * compatibility with old wpa_supplicant that wouldn't stop a
1186          * scheduled scan before starting a normal scan.
1187          */
1188
1189         if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1190                 return 0;
1191
1192         /* Use a switch, even though this is a bitmask, so that more
1193          * than one bits set will fall in default and we will warn.
1194          */
1195         switch (type) {
1196         case IWL_MVM_SCAN_REGULAR:
1197                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1198                         return -EBUSY;
1199                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1200         case IWL_MVM_SCAN_SCHED:
1201                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1202                         return -EBUSY;
1203                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1204         case IWL_MVM_SCAN_NETDETECT:
1205                 /* No need to stop anything for net-detect since the
1206                  * firmware is restarted anyway.  This way, any sched
1207                  * scans that were running will be restarted when we
1208                  * resume.
1209                 */
1210                 return 0;
1211         default:
1212                 WARN_ON(1);
1213                 break;
1214         }
1215
1216         return -EIO;
1217 }
1218
1219 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1220                            struct cfg80211_scan_request *req,
1221                            struct ieee80211_scan_ies *ies)
1222 {
1223         struct iwl_host_cmd hcmd = {
1224                 .len = { iwl_mvm_scan_size(mvm), },
1225                 .data = { mvm->scan_cmd, },
1226                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1227         };
1228         struct iwl_mvm_scan_params params = {};
1229         int ret;
1230         struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1231
1232         lockdep_assert_held(&mvm->mutex);
1233
1234         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1235                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1236                 return -EBUSY;
1237         }
1238
1239         ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1240         if (ret)
1241                 return ret;
1242
1243         /* we should have failed registration if scan_cmd was NULL */
1244         if (WARN_ON(!mvm->scan_cmd))
1245                 return -ENOMEM;
1246
1247         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1248                 return -ENOBUFS;
1249
1250         params.n_ssids = req->n_ssids;
1251         params.flags = req->flags;
1252         params.n_channels = req->n_channels;
1253         params.delay = 0;
1254         params.ssids = req->ssids;
1255         params.channels = req->channels;
1256         params.mac_addr = req->mac_addr;
1257         params.mac_addr_mask = req->mac_addr_mask;
1258         params.no_cck = req->no_cck;
1259         params.pass_all = true;
1260         params.n_match_sets = 0;
1261         params.match_sets = NULL;
1262
1263         params.scan_plans = &scan_plan;
1264         params.n_scan_plans = 1;
1265
1266         params.type =
1267                 iwl_mvm_get_scan_type(mvm,
1268                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1269
1270         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1271
1272         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1273                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1274                 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1275                                         IWL_MVM_SCAN_REGULAR);
1276         } else {
1277                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1278                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1279         }
1280
1281         if (ret)
1282                 return ret;
1283
1284         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1285         if (ret) {
1286                 /* If the scan failed, it usually means that the FW was unable
1287                  * to allocate the time events. Warn on it, but maybe we
1288                  * should try to send the command again with different params.
1289                  */
1290                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1291                 return ret;
1292         }
1293
1294         IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1295         mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1296         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1297
1298         return 0;
1299 }
1300
1301 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1302                              struct ieee80211_vif *vif,
1303                              struct cfg80211_sched_scan_request *req,
1304                              struct ieee80211_scan_ies *ies,
1305                              int type)
1306 {
1307         struct iwl_host_cmd hcmd = {
1308                 .len = { iwl_mvm_scan_size(mvm), },
1309                 .data = { mvm->scan_cmd, },
1310                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1311         };
1312         struct iwl_mvm_scan_params params = {};
1313         int ret;
1314
1315         lockdep_assert_held(&mvm->mutex);
1316
1317         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1318                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1319                 return -EBUSY;
1320         }
1321
1322         ret = iwl_mvm_check_running_scans(mvm, type);
1323         if (ret)
1324                 return ret;
1325
1326         /* we should have failed registration if scan_cmd was NULL */
1327         if (WARN_ON(!mvm->scan_cmd))
1328                 return -ENOMEM;
1329
1330         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1331                 return -ENOBUFS;
1332
1333         params.n_ssids = req->n_ssids;
1334         params.flags = req->flags;
1335         params.n_channels = req->n_channels;
1336         params.ssids = req->ssids;
1337         params.channels = req->channels;
1338         params.mac_addr = req->mac_addr;
1339         params.mac_addr_mask = req->mac_addr_mask;
1340         params.no_cck = false;
1341         params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
1342         params.n_match_sets = req->n_match_sets;
1343         params.match_sets = req->match_sets;
1344         if (!req->n_scan_plans)
1345                 return -EINVAL;
1346
1347         params.n_scan_plans = req->n_scan_plans;
1348         params.scan_plans = req->scan_plans;
1349
1350         params.type =
1351                 iwl_mvm_get_scan_type(mvm,
1352                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1353
1354         /* In theory, LMAC scans can handle a 32-bit delay, but since
1355          * waiting for over 18 hours to start the scan is a bit silly
1356          * and to keep it aligned with UMAC scans (which only support
1357          * 16-bit delays), trim it down to 16-bits.
1358          */
1359         if (req->delay > U16_MAX) {
1360                 IWL_DEBUG_SCAN(mvm,
1361                                "delay value is > 16-bits, set to max possible\n");
1362                 params.delay = U16_MAX;
1363         } else {
1364                 params.delay = req->delay;
1365         }
1366
1367         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1368         if (ret)
1369                 return ret;
1370
1371         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1372
1373         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1374                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1375                 ret = iwl_mvm_scan_umac(mvm, vif, &params, type);
1376         } else {
1377                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1378                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1379         }
1380
1381         if (ret)
1382                 return ret;
1383
1384         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1385         if (!ret) {
1386                 IWL_DEBUG_SCAN(mvm,
1387                                "Sched scan request was sent successfully\n");
1388                 mvm->scan_status |= type;
1389         } else {
1390                 /* If the scan failed, it usually means that the FW was unable
1391                  * to allocate the time events. Warn on it, but maybe we
1392                  * should try to send the command again with different params.
1393                  */
1394                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1395         }
1396
1397         return ret;
1398 }
1399
1400 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1401                                          struct iwl_rx_cmd_buffer *rxb)
1402 {
1403         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1404         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1405         u32 uid = __le32_to_cpu(notif->uid);
1406         bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1407
1408         if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1409                 return;
1410
1411         /* if the scan is already stopping, we don't need to notify mac80211 */
1412         if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1413                 ieee80211_scan_completed(mvm->hw, aborted);
1414                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1415         } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1416                 ieee80211_sched_scan_stopped(mvm->hw);
1417                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1418         }
1419
1420         mvm->scan_status &= ~mvm->scan_uid_status[uid];
1421         IWL_DEBUG_SCAN(mvm,
1422                        "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1423                        uid, mvm->scan_uid_status[uid],
1424                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1425                                 "completed" : "aborted",
1426                        iwl_mvm_ebs_status_str(notif->ebs_status));
1427         IWL_DEBUG_SCAN(mvm,
1428                        "Last line %d, Last iteration %d, Time from last iteration %d\n",
1429                        notif->last_schedule, notif->last_iter,
1430                        __le32_to_cpu(notif->time_from_last_iter));
1431
1432         if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1433             notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1434                 mvm->last_ebs_successful = false;
1435
1436         mvm->scan_uid_status[uid] = 0;
1437 }
1438
1439 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1440                                               struct iwl_rx_cmd_buffer *rxb)
1441 {
1442         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1443         struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1444         u8 buf[256];
1445
1446         IWL_DEBUG_SCAN(mvm,
1447                        "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n",
1448                        notif->status, notif->scanned_channels,
1449                        iwl_mvm_dump_channel_list(notif->results,
1450                                                  notif->scanned_channels, buf,
1451                                                  sizeof(buf)));
1452
1453         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1454                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1455                 ieee80211_sched_scan_results(mvm->hw);
1456                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1457         }
1458 }
1459
1460 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1461 {
1462         struct iwl_umac_scan_abort cmd = {};
1463         int uid, ret;
1464
1465         lockdep_assert_held(&mvm->mutex);
1466
1467         /* We should always get a valid index here, because we already
1468          * checked that this type of scan was running in the generic
1469          * code.
1470          */
1471         uid = iwl_mvm_scan_uid_by_status(mvm, type);
1472         if (WARN_ON_ONCE(uid < 0))
1473                 return uid;
1474
1475         cmd.uid = cpu_to_le32(uid);
1476
1477         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1478
1479         ret = iwl_mvm_send_cmd_pdu(mvm,
1480                                    iwl_cmd_id(SCAN_ABORT_UMAC,
1481                                               IWL_ALWAYS_LONG_GROUP, 0),
1482                                    0, sizeof(cmd), &cmd);
1483         if (!ret)
1484                 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1485
1486         return ret;
1487 }
1488
1489 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1490 {
1491         struct iwl_notification_wait wait_scan_done;
1492         static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1493                                               SCAN_OFFLOAD_COMPLETE, };
1494         int ret;
1495
1496         lockdep_assert_held(&mvm->mutex);
1497
1498         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1499                                    scan_done_notif,
1500                                    ARRAY_SIZE(scan_done_notif),
1501                                    NULL, NULL);
1502
1503         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1504
1505         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1506                 ret = iwl_mvm_umac_scan_abort(mvm, type);
1507         else
1508                 ret = iwl_mvm_lmac_scan_abort(mvm);
1509
1510         if (ret) {
1511                 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1512                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1513                 return ret;
1514         }
1515
1516         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1517
1518         return ret;
1519 }
1520
1521 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1522 {
1523         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1524                 return sizeof(struct iwl_scan_req_umac) +
1525                         sizeof(struct iwl_scan_channel_cfg_umac) *
1526                                 mvm->fw->ucode_capa.n_scan_channels +
1527                         sizeof(struct iwl_scan_req_umac_tail);
1528
1529         return sizeof(struct iwl_scan_req_lmac) +
1530                 sizeof(struct iwl_scan_channel_cfg_lmac) *
1531                 mvm->fw->ucode_capa.n_scan_channels +
1532                 sizeof(struct iwl_scan_probe_req);
1533 }
1534
1535 /*
1536  * This function is used in nic restart flow, to inform mac80211 about scans
1537  * that was aborted by restart flow or by an assert.
1538  */
1539 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1540 {
1541         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1542                 int uid, i;
1543
1544                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1545                 if (uid >= 0) {
1546                         ieee80211_scan_completed(mvm->hw, true);
1547                         mvm->scan_uid_status[uid] = 0;
1548                 }
1549                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1550                 if (uid >= 0 && !mvm->restart_fw) {
1551                         ieee80211_sched_scan_stopped(mvm->hw);
1552                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1553                         mvm->scan_uid_status[uid] = 0;
1554                 }
1555
1556                 /* We shouldn't have any UIDs still set.  Loop over all the
1557                  * UIDs to make sure there's nothing left there and warn if
1558                  * any is found.
1559                  */
1560                 for (i = 0; i < mvm->max_scans; i++) {
1561                         if (WARN_ONCE(mvm->scan_uid_status[i],
1562                                       "UMAC scan UID %d status was not cleaned\n",
1563                                       i))
1564                                 mvm->scan_uid_status[i] = 0;
1565                 }
1566         } else {
1567                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
1568                         ieee80211_scan_completed(mvm->hw, true);
1569
1570                 /* Sched scan will be restarted by mac80211 in
1571                  * restart_hw, so do not report if FW is about to be
1572                  * restarted.
1573                  */
1574                 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
1575                     !mvm->restart_fw) {
1576                         ieee80211_sched_scan_stopped(mvm->hw);
1577                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1578                 }
1579         }
1580 }
1581
1582 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1583 {
1584         int ret;
1585
1586         if (!(mvm->scan_status & type))
1587                 return 0;
1588
1589         if (iwl_mvm_is_radio_killed(mvm)) {
1590                 ret = 0;
1591                 goto out;
1592         }
1593
1594         ret = iwl_mvm_scan_stop_wait(mvm, type);
1595         if (!ret)
1596                 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1597 out:
1598         /* Clear the scan status so the next scan requests will
1599          * succeed and mark the scan as stopping, so that the Rx
1600          * handler doesn't do anything, as the scan was stopped from
1601          * above.
1602          */
1603         mvm->scan_status &= ~type;
1604
1605         if (type == IWL_MVM_SCAN_REGULAR) {
1606                 /* Since the rx handler won't do anything now, we have
1607                  * to release the scan reference here.
1608                  */
1609                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1610                 if (notify)
1611                         ieee80211_scan_completed(mvm->hw, true);
1612         } else if (notify) {
1613                 ieee80211_sched_scan_stopped(mvm->hw);
1614                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1615         }
1616
1617         return ret;
1618 }