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

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  10  * Copyright(c) 2016 - 2017 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 #define IWL_SCAN_DWELL_ACTIVE           10
  85 #define IWL_SCAN_DWELL_PASSIVE          110
  86 #define IWL_SCAN_DWELL_FRAGMENTED       44
  87 #define IWL_SCAN_DWELL_EXTENDED         90
  88
  89 struct iwl_mvm_scan_timing_params {
  90         u32 suspend_time;
  91         u32 max_out_time;
  92 };
  93
  94 static struct iwl_mvm_scan_timing_params scan_timing[] = {
  95         [IWL_SCAN_TYPE_UNASSOC] = {
  96                 .suspend_time = 0,
  97                 .max_out_time = 0,
  98         },
  99         [IWL_SCAN_TYPE_WILD] = {
 100                 .suspend_time = 30,
 101                 .max_out_time = 120,
 102         },
 103         [IWL_SCAN_TYPE_MILD] = {
 104                 .suspend_time = 120,
 105                 .max_out_time = 120,
 106         },
 107         [IWL_SCAN_TYPE_FRAGMENTED] = {
 108                 .suspend_time = 95,
 109                 .max_out_time = 44,
 110         },
 111 };
 112
 113 struct iwl_mvm_scan_params {
 114         enum iwl_mvm_scan_type type;
 115         u32 n_channels;
 116         u16 delay;
 117         int n_ssids;
 118         struct cfg80211_ssid *ssids;
 119         struct ieee80211_channel **channels;
 120         u32 flags;
 121         u8 *mac_addr;
 122         u8 *mac_addr_mask;
 123         bool no_cck;
 124         bool pass_all;
 125         int n_match_sets;
 126         struct iwl_scan_probe_req preq;
 127         struct cfg80211_match_set *match_sets;
 128         int n_scan_plans;
 129         struct cfg80211_sched_scan_plan *scan_plans;
 130         u32 measurement_dwell;
 131 };
 132
 133 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
 134 {
 135         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
 136
 137         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
 138                 return (void *)&cmd->v7.data;
 139
 140         if (iwl_mvm_has_new_tx_api(mvm))
 141                 return (void *)&cmd->v6.data;
 142
 143         return (void *)&cmd->v1.data;
 144 }
 145
 146 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
 147 {
 148         if (mvm->scan_rx_ant != ANT_NONE)
 149                 return mvm->scan_rx_ant;
 150         return iwl_mvm_get_valid_rx_ant(mvm);
 151 }
 152
 153 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 154 {
 155         u16 rx_chain;
 156         u8 rx_ant;
 157
 158         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 159         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 160         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 161         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 162         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 163         return cpu_to_le16(rx_chain);
 164 }
 165
 166 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band)
 167 {
 168         if (band == NL80211_BAND_2GHZ)
 169                 return cpu_to_le32(PHY_BAND_24);
 170         else
 171                 return cpu_to_le32(PHY_BAND_5);
 172 }
 173
 174 static inline __le32
 175 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
 176                           bool no_cck)
 177 {
 178         u32 tx_ant;
 179
 180         mvm->scan_last_antenna_idx =
 181                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 182                                      mvm->scan_last_antenna_idx);
 183         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 184
 185         if (band == NL80211_BAND_2GHZ && !no_cck)
 186                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 187                                    tx_ant);
 188         else
 189                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 190 }
 191
 192 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 193                                             struct ieee80211_vif *vif)
 194 {
 195         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 196         int *global_cnt = data;
 197
 198         if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 199             mvmvif->phy_ctxt->id < NUM_PHY_CTX)
 200                 *global_cnt += 1;
 201 }
 202
 203 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
 204 {
 205         return IWL_MVM_TRAFFIC_LOW;
 206 }
 207
 208 static enum
 209 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
 210 {
 211         int global_cnt = 0;
 212         enum iwl_mvm_traffic_load load;
 213         bool low_latency;
 214
 215         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 216                                             IEEE80211_IFACE_ITER_NORMAL,
 217                                             iwl_mvm_scan_condition_iterator,
 218                                             &global_cnt);
 219         if (!global_cnt)
 220                 return IWL_SCAN_TYPE_UNASSOC;
 221
 222         load = iwl_mvm_get_traffic_load(mvm);
 223         low_latency = iwl_mvm_low_latency(mvm);
 224
 225         if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
 226             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
 227                 return IWL_SCAN_TYPE_FRAGMENTED;
 228
 229         if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
 230                 return IWL_SCAN_TYPE_MILD;
 231
 232         return IWL_SCAN_TYPE_WILD;
 233 }
 234
 235 static int
 236 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm,
 237                               struct cfg80211_scan_request *req,
 238                               struct iwl_mvm_scan_params *params)
 239 {
 240         if (!req->duration)
 241                 return 0;
 242
 243         if (req->duration_mandatory &&
 244             req->duration > scan_timing[params->type].max_out_time) {
 245                 IWL_DEBUG_SCAN(mvm,
 246                                "Measurement scan - too long dwell %hu (max out time %u)\n",
 247                                req->duration,
 248                                scan_timing[params->type].max_out_time);
 249                 return -EOPNOTSUPP;
 250         }
 251
 252         return min_t(u32, (u32)req->duration,
 253                      scan_timing[params->type].max_out_time);
 254 }
 255
 256 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 257 {
 258         /* require rrm scan whenever the fw supports it */
 259         return fw_has_capa(&mvm->fw->ucode_capa,
 260                            IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
 261 }
 262
 263 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
 264 {
 265         int max_probe_len;
 266
 267         max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 268
 269         /* we create the 802.11 header and SSID element */
 270         max_probe_len -= 24 + 2;
 271
 272         /* DS parameter set element is added on 2.4GHZ band if required */
 273         if (iwl_mvm_rrm_scan_needed(mvm))
 274                 max_probe_len -= 3;
 275
 276         return max_probe_len;
 277 }
 278
 279 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 280 {
 281         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
 282
 283         /* TODO: [BUG] This function should return the maximum allowed size of
 284          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 285          * in the same command. So the correct implementation of this function
 286          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 287          * command has only 512 bytes and it would leave us with about 240
 288          * bytes for scan IEs, which is clearly not enough. So meanwhile
 289          * we will report an incorrect value. This may result in a failure to
 290          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 291          * functions with -ENOBUFS, if a large enough probe will be provided.
 292          */
 293         return max_ie_len;
 294 }
 295
 296 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 297                                               struct iwl_rx_cmd_buffer *rxb)
 298 {
 299         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 300         struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
 301
 302         IWL_DEBUG_SCAN(mvm,
 303                        "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
 304                        notif->status, notif->scanned_channels);
 305
 306         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
 307                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
 308                 ieee80211_sched_scan_results(mvm->hw);
 309                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 310         }
 311 }
 312
 313 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
 314                                  struct iwl_rx_cmd_buffer *rxb)
 315 {
 316         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 317         ieee80211_sched_scan_results(mvm->hw);
 318 }
 319
 320 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
 321 {
 322         switch (status) {
 323         case IWL_SCAN_EBS_SUCCESS:
 324                 return "successful";
 325         case IWL_SCAN_EBS_INACTIVE:
 326                 return "inactive";
 327         case IWL_SCAN_EBS_FAILED:
 328         case IWL_SCAN_EBS_CHAN_NOT_FOUND:
 329         default:
 330                 return "failed";
 331         }
 332 }
 333
 334 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
 335                                          struct iwl_rx_cmd_buffer *rxb)
 336 {
 337         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 338         struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
 339         bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 340
 341         /* If this happens, the firmware has mistakenly sent an LMAC
 342          * notification during UMAC scans -- warn and ignore it.
 343          */
 344         if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
 345                                      IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
 346                 return;
 347
 348         /* scan status must be locked for proper checking */
 349         lockdep_assert_held(&mvm->mutex);
 350
 351         /* We first check if we were stopping a scan, in which case we
 352          * just clear the stopping flag.  Then we check if it was a
 353          * firmware initiated stop, in which case we need to inform
 354          * mac80211.
 355          * Note that we can have a stopping and a running scan
 356          * simultaneously, but we can't have two different types of
 357          * scans stopping or running at the same time (since LMAC
 358          * doesn't support it).
 359          */
 360
 361         if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
 362                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
 363
 364                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 365                                aborted ? "aborted" : "completed",
 366                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 367                 IWL_DEBUG_SCAN(mvm,
 368                                "Last line %d, Last iteration %d, Time after last iteration %d\n",
 369                                scan_notif->last_schedule_line,
 370                                scan_notif->last_schedule_iteration,
 371                                __le32_to_cpu(scan_notif->time_after_last_iter));
 372
 373                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
 374         } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
 375                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
 376                                aborted ? "aborted" : "completed",
 377                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 378
 379                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
 380         } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
 381                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
 382
 383                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 384                                aborted ? "aborted" : "completed",
 385                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 386                 IWL_DEBUG_SCAN(mvm,
 387                                "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
 388                                scan_notif->last_schedule_line,
 389                                scan_notif->last_schedule_iteration,
 390                                __le32_to_cpu(scan_notif->time_after_last_iter));
 391
 392                 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
 393                 ieee80211_sched_scan_stopped(mvm->hw);
 394                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 395         } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
 396                 struct cfg80211_scan_info info = {
 397                         .aborted = aborted,
 398                 };
 399
 400                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
 401                                aborted ? "aborted" : "completed",
 402                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 403
 404                 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
 405                 ieee80211_scan_completed(mvm->hw, &info);
 406                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 407                 cancel_delayed_work(&mvm->scan_timeout_dwork);
 408         } else {
 409                 IWL_ERR(mvm,
 410                         "got scan complete notification but no scan is running\n");
 411         }
 412
 413         mvm->last_ebs_successful =
 414                         scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
 415                         scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
 416 }
 417
 418 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 419 {
 420         int i;
 421
 422         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 423                 if (!ssid_list[i].len)
 424                         break;
 425                 if (ssid_list[i].len == ssid_len &&
 426                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 427                         return i;
 428         }
 429         return -1;
 430 }
 431
 432 /* We insert the SSIDs in an inverted order, because the FW will
 433  * invert it back.
 434  */
 435 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
 436                                  struct iwl_ssid_ie *ssids,
 437                                  u32 *ssid_bitmap)
 438 {
 439         int i, j;
 440         int index;
 441
 442         /*
 443          * copy SSIDs from match list.
 444          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 445          * config match list.
 446          */
 447         for (i = 0, j = params->n_match_sets - 1;
 448              j >= 0 && i < PROBE_OPTION_MAX;
 449              i++, j--) {
 450                 /* skip empty SSID matchsets */
 451                 if (!params->match_sets[j].ssid.ssid_len)
 452                         continue;
 453                 ssids[i].id = WLAN_EID_SSID;
 454                 ssids[i].len = params->match_sets[j].ssid.ssid_len;
 455                 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
 456                        ssids[i].len);
 457         }
 458
 459         /* add SSIDs from scan SSID list */
 460         *ssid_bitmap = 0;
 461         for (j = params->n_ssids - 1;
 462              j >= 0 && i < PROBE_OPTION_MAX;
 463              i++, j--) {
 464                 index = iwl_ssid_exist(params->ssids[j].ssid,
 465                                        params->ssids[j].ssid_len,
 466                                        ssids);
 467                 if (index < 0) {
 468                         ssids[i].id = WLAN_EID_SSID;
 469                         ssids[i].len = params->ssids[j].ssid_len;
 470                         memcpy(ssids[i].ssid, params->ssids[j].ssid,
 471                                ssids[i].len);
 472                         *ssid_bitmap |= BIT(i);
 473                 } else {
 474                         *ssid_bitmap |= BIT(index);
 475                 }
 476         }
 477 }
 478
 479 static int
 480 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 481                                    struct cfg80211_sched_scan_request *req)
 482 {
 483         struct iwl_scan_offload_profile *profile;
 484         struct iwl_scan_offload_profile_cfg *profile_cfg;
 485         struct iwl_scan_offload_blacklist *blacklist;
 486         struct iwl_host_cmd cmd = {
 487                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 488                 .len[1] = sizeof(*profile_cfg),
 489                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 490                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 491         };
 492         int blacklist_len;
 493         int i;
 494         int ret;
 495
 496         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 497                 return -EIO;
 498
 499         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 500                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 501         else
 502                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 503
 504         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 505         if (!blacklist)
 506                 return -ENOMEM;
 507
 508         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 509         if (!profile_cfg) {
 510                 ret = -ENOMEM;
 511                 goto free_blacklist;
 512         }
 513
 514         cmd.data[0] = blacklist;
 515         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 516         cmd.data[1] = profile_cfg;
 517
 518         /* No blacklist configuration */
 519
 520         profile_cfg->num_profiles = req->n_match_sets;
 521         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 522         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 523         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 524         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 525                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 526
 527         for (i = 0; i < req->n_match_sets; i++) {
 528                 profile = &profile_cfg->profiles[i];
 529                 profile->ssid_index = i;
 530                 /* Support any cipher and auth algorithm */
 531                 profile->unicast_cipher = 0xff;
 532                 profile->auth_alg = 0xff;
 533                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 534                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 535                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 536         }
 537
 538         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 539
 540         ret = iwl_mvm_send_cmd(mvm, &cmd);
 541         kfree(profile_cfg);
 542 free_blacklist:
 543         kfree(blacklist);
 544
 545         return ret;
 546 }
 547
 548 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
 549                                   struct cfg80211_sched_scan_request *req)
 550 {
 551         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 552                 IWL_DEBUG_SCAN(mvm,
 553                                "Sending scheduled scan with filtering, n_match_sets %d\n",
 554                                req->n_match_sets);
 555                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 556                 return false;
 557         }
 558
 559         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
 560
 561         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 562         return true;
 563 }
 564
 565 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
 566 {
 567         int ret;
 568         struct iwl_host_cmd cmd = {
 569                 .id = SCAN_OFFLOAD_ABORT_CMD,
 570         };
 571         u32 status = CAN_ABORT_STATUS;
 572
 573         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
 574         if (ret)
 575                 return ret;
 576
 577         if (status != CAN_ABORT_STATUS) {
 578                 /*
 579                  * The scan abort will return 1 for success or
 580                  * 2 for "failure".  A failure condition can be
 581                  * due to simply not being in an active scan which
 582                  * can occur if we send the scan abort before the
 583                  * microcode has notified us that a scan is completed.
 584                  */
 585                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
 586                 ret = -ENOENT;
 587         }
 588
 589         return ret;
 590 }
 591
 592 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
 593                                      struct iwl_scan_req_tx_cmd *tx_cmd,
 594                                      bool no_cck)
 595 {
 596         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 597                                          TX_CMD_FLG_BT_DIS);
 598         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 599                                                            NL80211_BAND_2GHZ,
 600                                                            no_cck);
 601         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
 602
 603         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 604                                          TX_CMD_FLG_BT_DIS);
 605         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 606                                                            NL80211_BAND_5GHZ,
 607                                                            no_cck);
 608         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
 609 }
 610
 611 static void
 612 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
 613                                struct ieee80211_channel **channels,
 614                                int n_channels, u32 ssid_bitmap,
 615                                struct iwl_scan_req_lmac *cmd)
 616 {
 617         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
 618         int i;
 619
 620         for (i = 0; i < n_channels; i++) {
 621                 channel_cfg[i].channel_num =
 622                         cpu_to_le16(channels[i]->hw_value);
 623                 channel_cfg[i].iter_count = cpu_to_le16(1);
 624                 channel_cfg[i].iter_interval = 0;
 625                 channel_cfg[i].flags =
 626                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
 627                                     ssid_bitmap);
 628         }
 629 }
 630
 631 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 632                                            size_t len, u8 *const pos)
 633 {
 634         static const u8 before_ds_params[] = {
 635                         WLAN_EID_SSID,
 636                         WLAN_EID_SUPP_RATES,
 637                         WLAN_EID_REQUEST,
 638                         WLAN_EID_EXT_SUPP_RATES,
 639         };
 640         size_t offs;
 641         u8 *newpos = pos;
 642
 643         if (!iwl_mvm_rrm_scan_needed(mvm)) {
 644                 memcpy(newpos, ies, len);
 645                 return newpos + len;
 646         }
 647
 648         offs = ieee80211_ie_split(ies, len,
 649                                   before_ds_params,
 650                                   ARRAY_SIZE(before_ds_params),
 651                                   0);
 652
 653         memcpy(newpos, ies, offs);
 654         newpos += offs;
 655
 656         /* Add a placeholder for DS Parameter Set element */
 657         *newpos++ = WLAN_EID_DS_PARAMS;
 658         *newpos++ = 1;
 659         *newpos++ = 0;
 660
 661         memcpy(newpos, ies + offs, len - offs);
 662         newpos += len - offs;
 663
 664         return newpos;
 665 }
 666
 667 static void
 668 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 669                          struct ieee80211_scan_ies *ies,
 670                          struct iwl_mvm_scan_params *params)
 671 {
 672         struct ieee80211_mgmt *frame = (void *)params->preq.buf;
 673         u8 *pos, *newpos;
 674         const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
 675                 params->mac_addr : NULL;
 676
 677         /*
 678          * Unfortunately, right now the offload scan doesn't support randomising
 679          * within the firmware, so until the firmware API is ready we implement
 680          * it in the driver. This means that the scan iterations won't really be
 681          * random, only when it's restarted, but at least that helps a bit.
 682          */
 683         if (mac_addr)
 684                 get_random_mask_addr(frame->sa, mac_addr,
 685                                      params->mac_addr_mask);
 686         else
 687                 memcpy(frame->sa, vif->addr, ETH_ALEN);
 688
 689         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 690         eth_broadcast_addr(frame->da);
 691         eth_broadcast_addr(frame->bssid);
 692         frame->seq_ctrl = 0;
 693
 694         pos = frame->u.probe_req.variable;
 695         *pos++ = WLAN_EID_SSID;
 696         *pos++ = 0;
 697
 698         params->preq.mac_header.offset = 0;
 699         params->preq.mac_header.len = cpu_to_le16(24 + 2);
 700
 701         /* Insert ds parameter set element on 2.4 GHz band */
 702         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
 703                                                  ies->ies[NL80211_BAND_2GHZ],
 704                                                  ies->len[NL80211_BAND_2GHZ],
 705                                                  pos);
 706         params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
 707         params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
 708         pos = newpos;
 709
 710         memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
 711                ies->len[NL80211_BAND_5GHZ]);
 712         params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
 713         params->preq.band_data[1].len =
 714                 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
 715         pos += ies->len[NL80211_BAND_5GHZ];
 716
 717         memcpy(pos, ies->common_ies, ies->common_ie_len);
 718         params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
 719         params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
 720 }
 721
 722 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
 723                                     struct iwl_scan_req_lmac *cmd,
 724                                     struct iwl_mvm_scan_params *params)
 725 {
 726         cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
 727         cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
 728         cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
 729         cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
 730         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
 731         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
 732         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
 733 }
 734
 735 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
 736                                      struct ieee80211_scan_ies *ies,
 737                                      int n_channels)
 738 {
 739         return ((n_ssids <= PROBE_OPTION_MAX) &&
 740                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
 741                 (ies->common_ie_len +
 742                  ies->len[NL80211_BAND_2GHZ] +
 743                  ies->len[NL80211_BAND_5GHZ] <=
 744                  iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
 745 }
 746
 747 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 748                                         struct ieee80211_vif *vif)
 749 {
 750         const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
 751
 752         /* We can only use EBS if:
 753          *      1. the feature is supported;
 754          *      2. the last EBS was successful;
 755          *      3. if only single scan, the single scan EBS API is supported;
 756          *      4. it's not a p2p find operation.
 757          */
 758         return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 759                 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
 760                 vif->type != NL80211_IFTYPE_P2P_DEVICE);
 761 }
 762
 763 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
 764 {
 765         return params->n_scan_plans == 1 &&
 766                 params->scan_plans[0].iterations == 1;
 767 }
 768
 769 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 770                                    struct iwl_mvm_scan_params *params,
 771                                    struct ieee80211_vif *vif)
 772 {
 773         int flags = 0;
 774
 775         if (params->n_ssids == 0)
 776                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
 777
 778         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
 779                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
 780
 781         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
 782                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 783
 784         if (iwl_mvm_rrm_scan_needed(mvm))
 785                 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 786
 787         if (params->pass_all)
 788                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
 789         else
 790                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
 791
 792 #ifdef CONFIG_IWLWIFI_DEBUGFS
 793         if (mvm->scan_iter_notif_enabled)
 794                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 795 #endif
 796
 797         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
 798                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 799
 800         if (iwl_mvm_is_regular_scan(params) &&
 801             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 802             params->type != IWL_SCAN_TYPE_FRAGMENTED)
 803                 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
 804
 805         return flags;
 806 }
 807
 808 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 809                              struct iwl_mvm_scan_params *params)
 810 {
 811         struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
 812         struct iwl_scan_probe_req *preq =
 813                 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
 814                          mvm->fw->ucode_capa.n_scan_channels);
 815         u32 ssid_bitmap = 0;
 816         int i;
 817
 818         lockdep_assert_held(&mvm->mutex);
 819
 820         memset(cmd, 0, ksize(cmd));
 821
 822         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
 823                 return -EINVAL;
 824
 825         iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
 826
 827         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
 828         cmd->iter_num = cpu_to_le32(1);
 829         cmd->n_channels = (u8)params->n_channels;
 830
 831         cmd->delay = cpu_to_le32(params->delay);
 832
 833         cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
 834                                                               vif));
 835
 836         cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
 837         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 838                                         MAC_FILTER_IN_BEACON);
 839         iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
 840         iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
 841
 842         /* this API uses bits 1-20 instead of 0-19 */
 843         ssid_bitmap <<= 1;
 844
 845         for (i = 0; i < params->n_scan_plans; i++) {
 846                 struct cfg80211_sched_scan_plan *scan_plan =
 847                         &params->scan_plans[i];
 848
 849                 cmd->schedule[i].delay =
 850                         cpu_to_le16(scan_plan->interval);
 851                 cmd->schedule[i].iterations = scan_plan->iterations;
 852                 cmd->schedule[i].full_scan_mul = 1;
 853         }
 854
 855         /*
 856          * If the number of iterations of the last scan plan is set to
 857          * zero, it should run infinitely. However, this is not always the case.
 858          * For example, when regular scan is requested the driver sets one scan
 859          * plan with one iteration.
 860          */
 861         if (!cmd->schedule[i - 1].iterations)
 862                 cmd->schedule[i - 1].iterations = 0xff;
 863
 864         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
 865                 cmd->channel_opt[0].flags =
 866                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 867                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 868                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 869                 cmd->channel_opt[0].non_ebs_ratio =
 870                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
 871                 cmd->channel_opt[1].flags =
 872                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 873                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 874                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 875                 cmd->channel_opt[1].non_ebs_ratio =
 876                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
 877         }
 878
 879         iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
 880                                        params->n_channels, ssid_bitmap, cmd);
 881
 882         *preq = params->preq;
 883
 884         return 0;
 885 }
 886
 887 static int rate_to_scan_rate_flag(unsigned int rate)
 888 {
 889         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
 890                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
 891                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
 892                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
 893                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
 894                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
 895                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
 896                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
 897                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
 898                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
 899                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
 900                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
 901                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
 902         };
 903
 904         return rate_to_scan_rate[rate];
 905 }
 906
 907 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
 908 {
 909         struct ieee80211_supported_band *band;
 910         unsigned int rates = 0;
 911         int i;
 912
 913         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 914         for (i = 0; i < band->n_bitrates; i++)
 915                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 916         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 917         for (i = 0; i < band->n_bitrates; i++)
 918                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 919
 920         /* Set both basic rates and supported rates */
 921         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
 922
 923         return cpu_to_le32(rates);
 924 }
 925
 926 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
 927                                     struct iwl_scan_dwell *dwell)
 928 {
 929         dwell->active = IWL_SCAN_DWELL_ACTIVE;
 930         dwell->passive = IWL_SCAN_DWELL_PASSIVE;
 931         dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
 932         dwell->extended = IWL_SCAN_DWELL_EXTENDED;
 933 }
 934
 935 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels)
 936 {
 937         struct ieee80211_supported_band *band;
 938         int i, j = 0;
 939
 940         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 941         for (i = 0; i < band->n_channels; i++, j++)
 942                 channels[j] = band->channels[i].hw_value;
 943         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 944         for (i = 0; i < band->n_channels; i++, j++)
 945                 channels[j] = band->channels[i].hw_value;
 946 }
 947
 948 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
 949                                         u32 flags, u8 channel_flags)
 950 {
 951         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
 952         struct iwl_scan_config_v1 *cfg = config;
 953
 954         cfg->flags = cpu_to_le32(flags);
 955         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
 956         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
 957         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
 958         cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
 959         cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
 960
 961         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
 962
 963         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
 964
 965         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
 966         cfg->channel_flags = channel_flags;
 967
 968         iwl_mvm_fill_channels(mvm, cfg->channel_array);
 969 }
 970
 971 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config,
 972                                      u32 flags, u8 channel_flags)
 973 {
 974         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
 975         struct iwl_scan_config *cfg = config;
 976
 977         cfg->flags = cpu_to_le32(flags);
 978         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
 979         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
 980         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
 981         cfg->out_of_channel_time[0] =
 982                 cpu_to_le32(scan_timing[type].max_out_time);
 983         cfg->suspend_time[0] = cpu_to_le32(scan_timing[type].suspend_time);
 984
 985         if (iwl_mvm_is_cdb_supported(mvm)) {
 986                 cfg->suspend_time[1] =
 987                         cpu_to_le32(scan_timing[type].suspend_time);
 988                 cfg->out_of_channel_time[1] =
 989                         cpu_to_le32(scan_timing[type].max_out_time);
 990         }
 991
 992         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
 993
 994         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
 995
 996         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
 997         cfg->channel_flags = channel_flags;
 998
 999         iwl_mvm_fill_channels(mvm, cfg->channel_array);
1000 }
1001
1002 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1003 {
1004         void *cfg;
1005         int ret, cmd_size;
1006         struct iwl_host_cmd cmd = {
1007                 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
1008         };
1009         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
1010         int num_channels =
1011                 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1012                 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1013         u32 flags;
1014         u8 channel_flags;
1015
1016         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1017                 return -ENOBUFS;
1018
1019         if (type == mvm->scan_type)
1020                 return 0;
1021
1022         if (iwl_mvm_has_new_tx_api(mvm))
1023                 cmd_size = sizeof(struct iwl_scan_config);
1024         else
1025                 cmd_size = sizeof(struct iwl_scan_config_v1);
1026         cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1027
1028         cfg = kzalloc(cmd_size, GFP_KERNEL);
1029         if (!cfg)
1030                 return -ENOMEM;
1031
1032         flags = SCAN_CONFIG_FLAG_ACTIVATE |
1033                  SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1034                  SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1035                  SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1036                  SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1037                  SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1038                  SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1039                  SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1040                  SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1041                  SCAN_CONFIG_N_CHANNELS(num_channels) |
1042                  (type == IWL_SCAN_TYPE_FRAGMENTED ?
1043                   SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1044                   SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1045
1046         channel_flags = IWL_CHANNEL_FLAG_EBS |
1047                         IWL_CHANNEL_FLAG_ACCURATE_EBS |
1048                         IWL_CHANNEL_FLAG_EBS_ADD |
1049                         IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1050
1051         if (iwl_mvm_has_new_tx_api(mvm)) {
1052                 flags |= (type == IWL_SCAN_TYPE_FRAGMENTED) ?
1053                          SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1054                          SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1055                 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags);
1056         } else {
1057                 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags);
1058         }
1059
1060         cmd.data[0] = cfg;
1061         cmd.len[0] = cmd_size;
1062         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1063
1064         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1065
1066         ret = iwl_mvm_send_cmd(mvm, &cmd);
1067         if (!ret)
1068                 mvm->scan_type = type;
1069
1070         kfree(cfg);
1071         return ret;
1072 }
1073
1074 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1075 {
1076         int i;
1077
1078         for (i = 0; i < mvm->max_scans; i++)
1079                 if (mvm->scan_uid_status[i] == status)
1080                         return i;
1081
1082         return -ENOENT;
1083 }
1084
1085 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1086                                     struct iwl_scan_req_umac *cmd,
1087                                     struct iwl_mvm_scan_params *params)
1088 {
1089         struct iwl_mvm_scan_timing_params *timing = &scan_timing[params->type];
1090
1091         if (iwl_mvm_is_regular_scan(params))
1092                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1093         else
1094                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1095
1096         if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1097                 if (params->measurement_dwell) {
1098                         cmd->v7.active_dwell = params->measurement_dwell;
1099                         cmd->v7.passive_dwell = params->measurement_dwell;
1100                 } else {
1101                         cmd->v7.active_dwell = IWL_SCAN_DWELL_ACTIVE;
1102                         cmd->v7.passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1103                 }
1104                 cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1105
1106                 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1107                 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1108                         cpu_to_le32(timing->max_out_time);
1109                 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1110                         cpu_to_le32(timing->suspend_time);
1111                 if (iwl_mvm_is_cdb_supported(mvm)) {
1112                         cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1113                                 cpu_to_le32(timing->max_out_time);
1114                         cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1115                                 cpu_to_le32(timing->suspend_time);
1116                 }
1117
1118                 return;
1119         }
1120
1121         if (params->measurement_dwell) {
1122                 cmd->v1.active_dwell = params->measurement_dwell;
1123                 cmd->v1.passive_dwell = params->measurement_dwell;
1124                 cmd->v1.extended_dwell = params->measurement_dwell;
1125         } else {
1126                 cmd->v1.active_dwell = IWL_SCAN_DWELL_ACTIVE;
1127                 cmd->v1.passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1128                 cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED;
1129         }
1130         cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1131
1132         if (iwl_mvm_has_new_tx_api(mvm)) {
1133                 cmd->v6.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1134                 cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1135                         cpu_to_le32(timing->max_out_time);
1136                 cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1137                         cpu_to_le32(timing->suspend_time);
1138                 if (iwl_mvm_is_cdb_supported(mvm)) {
1139                         cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1140                                 cpu_to_le32(timing->max_out_time);
1141                         cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1142                                 cpu_to_le32(timing->suspend_time);
1143                 }
1144         } else {
1145                 cmd->v1.max_out_time = cpu_to_le32(timing->max_out_time);
1146                 cmd->v1.suspend_time = cpu_to_le32(timing->suspend_time);
1147                 cmd->v1.scan_priority =
1148                         cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1149         }
1150 }
1151
1152 static void
1153 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1154                                struct ieee80211_channel **channels,
1155                                int n_channels, u32 ssid_bitmap,
1156                                struct iwl_scan_channel_cfg_umac *channel_cfg)
1157 {
1158         int i;
1159
1160         for (i = 0; i < n_channels; i++) {
1161                 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1162                 channel_cfg[i].channel_num = channels[i]->hw_value;
1163                 channel_cfg[i].iter_count = 1;
1164                 channel_cfg[i].iter_interval = 0;
1165         }
1166 }
1167
1168 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1169                                    struct iwl_mvm_scan_params *params,
1170                                    struct ieee80211_vif *vif)
1171 {
1172         u16 flags = 0;
1173
1174         if (params->n_ssids == 0)
1175                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1176
1177         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1178                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1179
1180         if (params->type == IWL_SCAN_TYPE_FRAGMENTED) {
1181                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1182                 if (iwl_mvm_is_cdb_supported(mvm))
1183                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
1184         }
1185
1186         if (iwl_mvm_rrm_scan_needed(mvm))
1187                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1188
1189         if (params->pass_all)
1190                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1191         else
1192                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1193
1194         if (!iwl_mvm_is_regular_scan(params))
1195                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1196
1197         if (params->measurement_dwell)
1198                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1199
1200 #ifdef CONFIG_IWLWIFI_DEBUGFS
1201         if (mvm->scan_iter_notif_enabled)
1202                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1203 #endif
1204
1205         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1206                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1207
1208         if (iwl_mvm_is_regular_scan(params) &&
1209             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1210             params->type != IWL_SCAN_TYPE_FRAGMENTED)
1211                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1212
1213         return flags;
1214 }
1215
1216 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1217                              struct iwl_mvm_scan_params *params,
1218                              int type)
1219 {
1220         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1221         void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
1222         struct iwl_scan_req_umac_tail *sec_part = cmd_data +
1223                 sizeof(struct iwl_scan_channel_cfg_umac) *
1224                         mvm->fw->ucode_capa.n_scan_channels;
1225         int uid, i;
1226         u32 ssid_bitmap = 0;
1227         u8 channel_flags = 0;
1228         struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
1229
1230         lockdep_assert_held(&mvm->mutex);
1231
1232         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1233                 return -EINVAL;
1234
1235         uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1236         if (uid < 0)
1237                 return uid;
1238
1239         memset(cmd, 0, ksize(cmd));
1240
1241         iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1242
1243         mvm->scan_uid_status[uid] = type;
1244
1245         cmd->uid = cpu_to_le32(uid);
1246         cmd->general_flags = cpu_to_le16(iwl_mvm_scan_umac_flags(mvm, params,
1247                                                                  vif));
1248         cmd->scan_start_mac_id = scan_vif->id;
1249
1250         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1251                 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1252
1253         if (iwl_mvm_scan_use_ebs(mvm, vif))
1254                 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1255                                 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1256                                 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1257
1258         if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1259                 cmd->v7.channel_flags = channel_flags;
1260                 cmd->v7.n_channels = params->n_channels;
1261         } else if (iwl_mvm_has_new_tx_api(mvm)) {
1262                 cmd->v6.channel_flags = channel_flags;
1263                 cmd->v6.n_channels = params->n_channels;
1264         } else {
1265                 cmd->v1.channel_flags = channel_flags;
1266                 cmd->v1.n_channels = params->n_channels;
1267         }
1268
1269         iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1270
1271         iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1272                                        params->n_channels, ssid_bitmap,
1273                                        cmd_data);
1274
1275         for (i = 0; i < params->n_scan_plans; i++) {
1276                 struct cfg80211_sched_scan_plan *scan_plan =
1277                         &params->scan_plans[i];
1278
1279                 sec_part->schedule[i].iter_count = scan_plan->iterations;
1280                 sec_part->schedule[i].interval =
1281                         cpu_to_le16(scan_plan->interval);
1282         }
1283
1284         /*
1285          * If the number of iterations of the last scan plan is set to
1286          * zero, it should run infinitely. However, this is not always the case.
1287          * For example, when regular scan is requested the driver sets one scan
1288          * plan with one iteration.
1289          */
1290         if (!sec_part->schedule[i - 1].iter_count)
1291                 sec_part->schedule[i - 1].iter_count = 0xff;
1292
1293         sec_part->delay = cpu_to_le16(params->delay);
1294         sec_part->preq = params->preq;
1295
1296         return 0;
1297 }
1298
1299 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1300 {
1301         return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1302 }
1303
1304 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1305 {
1306         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1307                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1308
1309         /* This looks a bit arbitrary, but the idea is that if we run
1310          * out of possible simultaneous scans and the userspace is
1311          * trying to run a scan type that is already running, we
1312          * return -EBUSY.  But if the userspace wants to start a
1313          * different type of scan, we stop the opposite type to make
1314          * space for the new request.  The reason is backwards
1315          * compatibility with old wpa_supplicant that wouldn't stop a
1316          * scheduled scan before starting a normal scan.
1317          */
1318
1319         if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1320                 return 0;
1321
1322         /* Use a switch, even though this is a bitmask, so that more
1323          * than one bits set will fall in default and we will warn.
1324          */
1325         switch (type) {
1326         case IWL_MVM_SCAN_REGULAR:
1327                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1328                         return -EBUSY;
1329                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1330         case IWL_MVM_SCAN_SCHED:
1331                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1332                         return -EBUSY;
1333                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1334         case IWL_MVM_SCAN_NETDETECT:
1335                 /* For non-unified images, there's no need to stop
1336                  * anything for net-detect since the firmware is
1337                  * restarted anyway.  This way, any sched scans that
1338                  * were running will be restarted when we resume.
1339                  */
1340                 if (!unified_image)
1341                         return 0;
1342
1343                 /* If this is a unified image and we ran out of scans,
1344                  * we need to stop something.  Prefer stopping regular
1345                  * scans, because the results are useless at this
1346                  * point, and we should be able to keep running
1347                  * another scheduled scan while suspended.
1348                  */
1349                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1350                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
1351                                                  true);
1352                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1353                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
1354                                                  true);
1355
1356                 /* fall through, something is wrong if no scan was
1357                  * running but we ran out of scans.
1358                  */
1359         default:
1360                 WARN_ON(1);
1361                 break;
1362         }
1363
1364         return -EIO;
1365 }
1366
1367 #define SCAN_TIMEOUT 30000
1368
1369 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
1370 {
1371         struct delayed_work *delayed_work = to_delayed_work(work);
1372         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1373                                            scan_timeout_dwork);
1374
1375         IWL_ERR(mvm, "regular scan timed out\n");
1376
1377         iwl_force_nmi(mvm->trans);
1378 }
1379
1380 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1381                            struct cfg80211_scan_request *req,
1382                            struct ieee80211_scan_ies *ies)
1383 {
1384         struct iwl_host_cmd hcmd = {
1385                 .len = { iwl_mvm_scan_size(mvm), },
1386                 .data = { mvm->scan_cmd, },
1387                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1388         };
1389         struct iwl_mvm_scan_params params = {};
1390         int ret;
1391         struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1392
1393         lockdep_assert_held(&mvm->mutex);
1394
1395         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1396                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1397                 return -EBUSY;
1398         }
1399
1400         ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1401         if (ret)
1402                 return ret;
1403
1404         /* we should have failed registration if scan_cmd was NULL */
1405         if (WARN_ON(!mvm->scan_cmd))
1406                 return -ENOMEM;
1407
1408         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1409                 return -ENOBUFS;
1410
1411         params.n_ssids = req->n_ssids;
1412         params.flags = req->flags;
1413         params.n_channels = req->n_channels;
1414         params.delay = 0;
1415         params.ssids = req->ssids;
1416         params.channels = req->channels;
1417         params.mac_addr = req->mac_addr;
1418         params.mac_addr_mask = req->mac_addr_mask;
1419         params.no_cck = req->no_cck;
1420         params.pass_all = true;
1421         params.n_match_sets = 0;
1422         params.match_sets = NULL;
1423
1424         params.scan_plans = &scan_plan;
1425         params.n_scan_plans = 1;
1426
1427         params.type =
1428                 iwl_mvm_get_scan_type(mvm,
1429                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1430
1431         ret = iwl_mvm_get_measurement_dwell(mvm, req, &params);
1432         if (ret < 0)
1433                 return ret;
1434
1435         params.measurement_dwell = ret;
1436
1437         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1438
1439         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1440                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1441                 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1442                                         IWL_MVM_SCAN_REGULAR);
1443         } else {
1444                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1445                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1446         }
1447
1448         if (ret)
1449                 return ret;
1450
1451         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1452         if (ret) {
1453                 /* If the scan failed, it usually means that the FW was unable
1454                  * to allocate the time events. Warn on it, but maybe we
1455                  * should try to send the command again with different params.
1456                  */
1457                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1458                 return ret;
1459         }
1460
1461         IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1462         mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1463         mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
1464         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1465
1466         schedule_delayed_work(&mvm->scan_timeout_dwork,
1467                               msecs_to_jiffies(SCAN_TIMEOUT));
1468
1469         return 0;
1470 }
1471
1472 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1473                              struct ieee80211_vif *vif,
1474                              struct cfg80211_sched_scan_request *req,
1475                              struct ieee80211_scan_ies *ies,
1476                              int type)
1477 {
1478         struct iwl_host_cmd hcmd = {
1479                 .len = { iwl_mvm_scan_size(mvm), },
1480                 .data = { mvm->scan_cmd, },
1481                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1482         };
1483         struct iwl_mvm_scan_params params = {};
1484         int ret;
1485
1486         lockdep_assert_held(&mvm->mutex);
1487
1488         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1489                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1490                 return -EBUSY;
1491         }
1492
1493         ret = iwl_mvm_check_running_scans(mvm, type);
1494         if (ret)
1495                 return ret;
1496
1497         /* we should have failed registration if scan_cmd was NULL */
1498         if (WARN_ON(!mvm->scan_cmd))
1499                 return -ENOMEM;
1500
1501         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1502                 return -ENOBUFS;
1503
1504         params.n_ssids = req->n_ssids;
1505         params.flags = req->flags;
1506         params.n_channels = req->n_channels;
1507         params.ssids = req->ssids;
1508         params.channels = req->channels;
1509         params.mac_addr = req->mac_addr;
1510         params.mac_addr_mask = req->mac_addr_mask;
1511         params.no_cck = false;
1512         params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
1513         params.n_match_sets = req->n_match_sets;
1514         params.match_sets = req->match_sets;
1515         if (!req->n_scan_plans)
1516                 return -EINVAL;
1517
1518         params.n_scan_plans = req->n_scan_plans;
1519         params.scan_plans = req->scan_plans;
1520
1521         params.type =
1522                 iwl_mvm_get_scan_type(mvm,
1523                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1524
1525         /* In theory, LMAC scans can handle a 32-bit delay, but since
1526          * waiting for over 18 hours to start the scan is a bit silly
1527          * and to keep it aligned with UMAC scans (which only support
1528          * 16-bit delays), trim it down to 16-bits.
1529          */
1530         if (req->delay > U16_MAX) {
1531                 IWL_DEBUG_SCAN(mvm,
1532                                "delay value is > 16-bits, set to max possible\n");
1533                 params.delay = U16_MAX;
1534         } else {
1535                 params.delay = req->delay;
1536         }
1537
1538         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1539         if (ret)
1540                 return ret;
1541
1542         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1543
1544         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1545                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1546                 ret = iwl_mvm_scan_umac(mvm, vif, &params, type);
1547         } else {
1548                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1549                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1550         }
1551
1552         if (ret)
1553                 return ret;
1554
1555         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1556         if (!ret) {
1557                 IWL_DEBUG_SCAN(mvm,
1558                                "Sched scan request was sent successfully\n");
1559                 mvm->scan_status |= type;
1560         } else {
1561                 /* If the scan failed, it usually means that the FW was unable
1562                  * to allocate the time events. Warn on it, but maybe we
1563                  * should try to send the command again with different params.
1564                  */
1565                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1566         }
1567
1568         return ret;
1569 }
1570
1571 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1572                                          struct iwl_rx_cmd_buffer *rxb)
1573 {
1574         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1575         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1576         u32 uid = __le32_to_cpu(notif->uid);
1577         bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1578
1579         if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1580                 return;
1581
1582         /* if the scan is already stopping, we don't need to notify mac80211 */
1583         if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1584                 struct cfg80211_scan_info info = {
1585                         .aborted = aborted,
1586                         .scan_start_tsf = mvm->scan_start,
1587                 };
1588
1589                 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN);
1590                 ieee80211_scan_completed(mvm->hw, &info);
1591                 mvm->scan_vif = NULL;
1592                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1593                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1594         } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1595                 ieee80211_sched_scan_stopped(mvm->hw);
1596                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1597         }
1598
1599         mvm->scan_status &= ~mvm->scan_uid_status[uid];
1600         IWL_DEBUG_SCAN(mvm,
1601                        "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1602                        uid, mvm->scan_uid_status[uid],
1603                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1604                                 "completed" : "aborted",
1605                        iwl_mvm_ebs_status_str(notif->ebs_status));
1606         IWL_DEBUG_SCAN(mvm,
1607                        "Last line %d, Last iteration %d, Time from last iteration %d\n",
1608                        notif->last_schedule, notif->last_iter,
1609                        __le32_to_cpu(notif->time_from_last_iter));
1610
1611         if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1612             notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1613                 mvm->last_ebs_successful = false;
1614
1615         mvm->scan_uid_status[uid] = 0;
1616 }
1617
1618 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1619                                               struct iwl_rx_cmd_buffer *rxb)
1620 {
1621         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1622         struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1623
1624         mvm->scan_start = le64_to_cpu(notif->start_tsf);
1625
1626         IWL_DEBUG_SCAN(mvm,
1627                        "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
1628                        notif->status, notif->scanned_channels);
1629
1630         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1631                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1632                 ieee80211_sched_scan_results(mvm->hw);
1633                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1634         }
1635
1636         IWL_DEBUG_SCAN(mvm,
1637                        "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
1638                        mvm->scan_start);
1639 }
1640
1641 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1642 {
1643         struct iwl_umac_scan_abort cmd = {};
1644         int uid, ret;
1645
1646         lockdep_assert_held(&mvm->mutex);
1647
1648         /* We should always get a valid index here, because we already
1649          * checked that this type of scan was running in the generic
1650          * code.
1651          */
1652         uid = iwl_mvm_scan_uid_by_status(mvm, type);
1653         if (WARN_ON_ONCE(uid < 0))
1654                 return uid;
1655
1656         cmd.uid = cpu_to_le32(uid);
1657
1658         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1659
1660         ret = iwl_mvm_send_cmd_pdu(mvm,
1661                                    iwl_cmd_id(SCAN_ABORT_UMAC,
1662                                               IWL_ALWAYS_LONG_GROUP, 0),
1663                                    0, sizeof(cmd), &cmd);
1664         if (!ret)
1665                 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1666
1667         return ret;
1668 }
1669
1670 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1671 {
1672         struct iwl_notification_wait wait_scan_done;
1673         static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1674                                               SCAN_OFFLOAD_COMPLETE, };
1675         int ret;
1676
1677         lockdep_assert_held(&mvm->mutex);
1678
1679         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1680                                    scan_done_notif,
1681                                    ARRAY_SIZE(scan_done_notif),
1682                                    NULL, NULL);
1683
1684         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1685
1686         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1687                 ret = iwl_mvm_umac_scan_abort(mvm, type);
1688         else
1689                 ret = iwl_mvm_lmac_scan_abort(mvm);
1690
1691         if (ret) {
1692                 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1693                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1694                 return ret;
1695         }
1696
1697         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1698
1699         return ret;
1700 }
1701
1702 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1703 {
1704         int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
1705
1706         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
1707                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
1708         else if (iwl_mvm_has_new_tx_api(mvm))
1709                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
1710
1711         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1712                 return base_size +
1713                         sizeof(struct iwl_scan_channel_cfg_umac) *
1714                                 mvm->fw->ucode_capa.n_scan_channels +
1715                         sizeof(struct iwl_scan_req_umac_tail);
1716
1717         return sizeof(struct iwl_scan_req_lmac) +
1718                 sizeof(struct iwl_scan_channel_cfg_lmac) *
1719                 mvm->fw->ucode_capa.n_scan_channels +
1720                 sizeof(struct iwl_scan_probe_req);
1721 }
1722
1723 /*
1724  * This function is used in nic restart flow, to inform mac80211 about scans
1725  * that was aborted by restart flow or by an assert.
1726  */
1727 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1728 {
1729         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1730                 int uid, i;
1731
1732                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1733                 if (uid >= 0) {
1734                         struct cfg80211_scan_info info = {
1735                                 .aborted = true,
1736                         };
1737
1738                         ieee80211_scan_completed(mvm->hw, &info);
1739                         mvm->scan_uid_status[uid] = 0;
1740                 }
1741                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1742                 if (uid >= 0 && !mvm->fw_restart) {
1743                         ieee80211_sched_scan_stopped(mvm->hw);
1744                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1745                         mvm->scan_uid_status[uid] = 0;
1746                 }
1747
1748                 /* We shouldn't have any UIDs still set.  Loop over all the
1749                  * UIDs to make sure there's nothing left there and warn if
1750                  * any is found.
1751                  */
1752                 for (i = 0; i < mvm->max_scans; i++) {
1753                         if (WARN_ONCE(mvm->scan_uid_status[i],
1754                                       "UMAC scan UID %d status was not cleaned\n",
1755                                       i))
1756                                 mvm->scan_uid_status[i] = 0;
1757                 }
1758         } else {
1759                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
1760                         struct cfg80211_scan_info info = {
1761                                 .aborted = true,
1762                         };
1763
1764                         ieee80211_scan_completed(mvm->hw, &info);
1765                 }
1766
1767                 /* Sched scan will be restarted by mac80211 in
1768                  * restart_hw, so do not report if FW is about to be
1769                  * restarted.
1770                  */
1771                 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
1772                     !mvm->fw_restart) {
1773                         ieee80211_sched_scan_stopped(mvm->hw);
1774                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1775                 }
1776         }
1777 }
1778
1779 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1780 {
1781         int ret;
1782
1783         if (!(mvm->scan_status & type))
1784                 return 0;
1785
1786         if (iwl_mvm_is_radio_killed(mvm)) {
1787                 ret = 0;
1788                 goto out;
1789         }
1790
1791         ret = iwl_mvm_scan_stop_wait(mvm, type);
1792         if (!ret)
1793                 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1794 out:
1795         /* Clear the scan status so the next scan requests will
1796          * succeed and mark the scan as stopping, so that the Rx
1797          * handler doesn't do anything, as the scan was stopped from
1798          * above.
1799          */
1800         mvm->scan_status &= ~type;
1801
1802         if (type == IWL_MVM_SCAN_REGULAR) {
1803                 /* Since the rx handler won't do anything now, we have
1804                  * to release the scan reference here.
1805                  */
1806                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1807                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1808                 if (notify) {
1809                         struct cfg80211_scan_info info = {
1810                                 .aborted = true,
1811                         };
1812
1813                         ieee80211_scan_completed(mvm->hw, &info);
1814                 }
1815         } else if (notify) {
1816                 ieee80211_sched_scan_stopped(mvm->hw);
1817                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1818         }
1819
1820         return ret;
1821 }