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

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /*
   3  * Copyright (C) 2012-2014, 2018-2023 Intel Corporation
   4  * Copyright (C) 2013-2015 Intel Mobile Communications GmbH
   5  * Copyright (C) 2016-2017 Intel Deutschland GmbH
   6  */
   7 #include <linux/etherdevice.h>
   8 #include <net/mac80211.h>
   9 #include <linux/crc32.h>
  10
  11 #include "mvm.h"
  12 #include "fw/api/scan.h"
  13 #include "iwl-io.h"
  14
  15 #define IWL_DENSE_EBS_SCAN_RATIO 5
  16 #define IWL_SPARSE_EBS_SCAN_RATIO 1
  17
  18 #define IWL_SCAN_DWELL_ACTIVE           10
  19 #define IWL_SCAN_DWELL_PASSIVE          110
  20 #define IWL_SCAN_DWELL_FRAGMENTED       44
  21 #define IWL_SCAN_DWELL_EXTENDED         90
  22 #define IWL_SCAN_NUM_OF_FRAGS           3
  23
  24 /* adaptive dwell max budget time [TU] for full scan */
  25 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300
  26 /* adaptive dwell max budget time [TU] for directed scan */
  27 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100
  28 /* adaptive dwell default high band APs number */
  29 #define IWL_SCAN_ADWELL_DEFAULT_HB_N_APS 8
  30 /* adaptive dwell default low band APs number */
  31 #define IWL_SCAN_ADWELL_DEFAULT_LB_N_APS 2
  32 /* adaptive dwell default APs number in social channels (1, 6, 11) */
  33 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
  34 /* number of scan channels */
  35 #define IWL_SCAN_NUM_CHANNELS 112
  36 /* adaptive dwell number of APs override mask for p2p friendly GO */
  37 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT BIT(20)
  38 /* adaptive dwell number of APs override mask for social channels */
  39 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT BIT(21)
  40 /* adaptive dwell number of APs override for p2p friendly GO channels */
  41 #define IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY 10
  42 /* adaptive dwell number of APs override for social channels */
  43 #define IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS 2
  44
  45 /* minimal number of 2GHz and 5GHz channels in the regular scan request */
  46 #define IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS 4
  47
  48 /* Number of iterations on the channel for mei filtered scan */
  49 #define IWL_MEI_SCAN_NUM_ITER   5U
  50
  51 struct iwl_mvm_scan_timing_params {
  52         u32 suspend_time;
  53         u32 max_out_time;
  54 };
  55
  56 static struct iwl_mvm_scan_timing_params scan_timing[] = {
  57         [IWL_SCAN_TYPE_UNASSOC] = {
  58                 .suspend_time = 0,
  59                 .max_out_time = 0,
  60         },
  61         [IWL_SCAN_TYPE_WILD] = {
  62                 .suspend_time = 30,
  63                 .max_out_time = 120,
  64         },
  65         [IWL_SCAN_TYPE_MILD] = {
  66                 .suspend_time = 120,
  67                 .max_out_time = 120,
  68         },
  69         [IWL_SCAN_TYPE_FRAGMENTED] = {
  70                 .suspend_time = 95,
  71                 .max_out_time = 44,
  72         },
  73         [IWL_SCAN_TYPE_FAST_BALANCE] = {
  74                 .suspend_time = 30,
  75                 .max_out_time = 37,
  76         },
  77 };
  78
  79 struct iwl_mvm_scan_params {
  80         /* For CDB this is low band scan type, for non-CDB - type. */
  81         enum iwl_mvm_scan_type type;
  82         enum iwl_mvm_scan_type hb_type;
  83         u32 n_channels;
  84         u16 delay;
  85         int n_ssids;
  86         struct cfg80211_ssid *ssids;
  87         struct ieee80211_channel **channels;
  88         u32 flags;
  89         u8 *mac_addr;
  90         u8 *mac_addr_mask;
  91         bool no_cck;
  92         bool pass_all;
  93         int n_match_sets;
  94         struct iwl_scan_probe_req preq;
  95         struct cfg80211_match_set *match_sets;
  96         int n_scan_plans;
  97         struct cfg80211_sched_scan_plan *scan_plans;
  98         bool iter_notif;
  99         struct cfg80211_scan_6ghz_params *scan_6ghz_params;
 100         u32 n_6ghz_params;
 101         bool scan_6ghz;
 102         bool enable_6ghz_passive;
 103         bool respect_p2p_go, respect_p2p_go_hb;
 104         u8 bssid[ETH_ALEN] __aligned(2);
 105 };
 106
 107 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
 108 {
 109         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
 110
 111         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
 112                 return (void *)&cmd->v8.data;
 113
 114         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
 115                 return (void *)&cmd->v7.data;
 116
 117         if (iwl_mvm_cdb_scan_api(mvm))
 118                 return (void *)&cmd->v6.data;
 119
 120         return (void *)&cmd->v1.data;
 121 }
 122
 123 static inline struct iwl_scan_umac_chan_param *
 124 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm)
 125 {
 126         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
 127
 128         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
 129                 return &cmd->v8.channel;
 130
 131         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
 132                 return &cmd->v7.channel;
 133
 134         if (iwl_mvm_cdb_scan_api(mvm))
 135                 return &cmd->v6.channel;
 136
 137         return &cmd->v1.channel;
 138 }
 139
 140 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
 141 {
 142         if (mvm->scan_rx_ant != ANT_NONE)
 143                 return mvm->scan_rx_ant;
 144         return iwl_mvm_get_valid_rx_ant(mvm);
 145 }
 146
 147 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 148 {
 149         u16 rx_chain;
 150         u8 rx_ant;
 151
 152         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 153         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 154         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 155         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 156         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 157         return cpu_to_le16(rx_chain);
 158 }
 159
 160 static inline __le32
 161 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
 162                           bool no_cck)
 163 {
 164         u32 tx_ant;
 165
 166         iwl_mvm_toggle_tx_ant(mvm, &mvm->scan_last_antenna_idx);
 167         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 168
 169         if (band == NL80211_BAND_2GHZ && !no_cck)
 170                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK_V1 |
 171                                    tx_ant);
 172         else
 173                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 174 }
 175
 176 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
 177 {
 178         return mvm->tcm.result.global_load;
 179 }
 180
 181 static enum iwl_mvm_traffic_load
 182 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band)
 183 {
 184         return mvm->tcm.result.band_load[band];
 185 }
 186
 187 struct iwl_mvm_scan_iter_data {
 188         u32 global_cnt;
 189         struct ieee80211_vif *current_vif;
 190         bool is_dcm_with_p2p_go;
 191 };
 192
 193 static void iwl_mvm_scan_iterator(void *_data, u8 *mac,
 194                                   struct ieee80211_vif *vif)
 195 {
 196         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 197         struct iwl_mvm_scan_iter_data *data = _data;
 198         struct iwl_mvm_vif *curr_mvmvif;
 199
 200         if (vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 201             mvmvif->deflink.phy_ctxt &&
 202             mvmvif->deflink.phy_ctxt->id < NUM_PHY_CTX)
 203                 data->global_cnt += 1;
 204
 205         if (!data->current_vif || vif == data->current_vif)
 206                 return;
 207
 208         curr_mvmvif = iwl_mvm_vif_from_mac80211(data->current_vif);
 209
 210         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 211             mvmvif->deflink.phy_ctxt && curr_mvmvif->deflink.phy_ctxt &&
 212             mvmvif->deflink.phy_ctxt->id != curr_mvmvif->deflink.phy_ctxt->id)
 213                 data->is_dcm_with_p2p_go = true;
 214 }
 215
 216 static enum
 217 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
 218                                          struct ieee80211_vif *vif,
 219                                          enum iwl_mvm_traffic_load load,
 220                                          bool low_latency)
 221 {
 222         struct iwl_mvm_scan_iter_data data = {
 223                 .current_vif = vif,
 224                 .is_dcm_with_p2p_go = false,
 225                 .global_cnt = 0,
 226         };
 227
 228         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 229                                                    IEEE80211_IFACE_ITER_NORMAL,
 230                                                    iwl_mvm_scan_iterator,
 231                                                    &data);
 232
 233         if (!data.global_cnt)
 234                 return IWL_SCAN_TYPE_UNASSOC;
 235
 236         if (fw_has_api(&mvm->fw->ucode_capa,
 237                        IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
 238                 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
 239                     (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE))
 240                         return IWL_SCAN_TYPE_FRAGMENTED;
 241
 242                 /*
 243                  * in case of DCM with GO where BSS DTIM interval < 220msec
 244                  * set all scan requests as fast-balance scan
 245                  */
 246                 if (vif && vif->type == NL80211_IFTYPE_STATION &&
 247                     data.is_dcm_with_p2p_go &&
 248                     ((vif->bss_conf.beacon_int *
 249                       vif->bss_conf.dtim_period) < 220))
 250                         return IWL_SCAN_TYPE_FAST_BALANCE;
 251         }
 252
 253         if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
 254                 return IWL_SCAN_TYPE_MILD;
 255
 256         return IWL_SCAN_TYPE_WILD;
 257 }
 258
 259 static enum
 260 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
 261                                         struct ieee80211_vif *vif)
 262 {
 263         enum iwl_mvm_traffic_load load;
 264         bool low_latency;
 265
 266         load = iwl_mvm_get_traffic_load(mvm);
 267         low_latency = iwl_mvm_low_latency(mvm);
 268
 269         return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
 270 }
 271
 272 static enum
 273 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm,
 274                                              struct ieee80211_vif *vif,
 275                                              enum nl80211_band band)
 276 {
 277         enum iwl_mvm_traffic_load load;
 278         bool low_latency;
 279
 280         load = iwl_mvm_get_traffic_load_band(mvm, band);
 281         low_latency = iwl_mvm_low_latency_band(mvm, band);
 282
 283         return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
 284 }
 285
 286 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 287 {
 288         /* require rrm scan whenever the fw supports it */
 289         return fw_has_capa(&mvm->fw->ucode_capa,
 290                            IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
 291 }
 292
 293 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
 294 {
 295         int max_probe_len;
 296
 297         max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 298
 299         /* we create the 802.11 header and SSID element */
 300         max_probe_len -= 24 + 2;
 301
 302         /* DS parameter set element is added on 2.4GHZ band if required */
 303         if (iwl_mvm_rrm_scan_needed(mvm))
 304                 max_probe_len -= 3;
 305
 306         return max_probe_len;
 307 }
 308
 309 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 310 {
 311         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
 312
 313         /* TODO: [BUG] This function should return the maximum allowed size of
 314          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 315          * in the same command. So the correct implementation of this function
 316          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 317          * command has only 512 bytes and it would leave us with about 240
 318          * bytes for scan IEs, which is clearly not enough. So meanwhile
 319          * we will report an incorrect value. This may result in a failure to
 320          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 321          * functions with -ENOBUFS, if a large enough probe will be provided.
 322          */
 323         return max_ie_len;
 324 }
 325
 326 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 327                                               struct iwl_rx_cmd_buffer *rxb)
 328 {
 329         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 330         struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
 331
 332         IWL_DEBUG_SCAN(mvm,
 333                        "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
 334                        notif->status, notif->scanned_channels);
 335
 336         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
 337                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
 338                 ieee80211_sched_scan_results(mvm->hw);
 339                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 340         }
 341 }
 342
 343 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
 344                                  struct iwl_rx_cmd_buffer *rxb)
 345 {
 346         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 347         ieee80211_sched_scan_results(mvm->hw);
 348 }
 349
 350 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
 351 {
 352         switch (status) {
 353         case IWL_SCAN_EBS_SUCCESS:
 354                 return "successful";
 355         case IWL_SCAN_EBS_INACTIVE:
 356                 return "inactive";
 357         case IWL_SCAN_EBS_FAILED:
 358         case IWL_SCAN_EBS_CHAN_NOT_FOUND:
 359         default:
 360                 return "failed";
 361         }
 362 }
 363
 364 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
 365                                          struct iwl_rx_cmd_buffer *rxb)
 366 {
 367         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 368         struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
 369         bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 370
 371         /* If this happens, the firmware has mistakenly sent an LMAC
 372          * notification during UMAC scans -- warn and ignore it.
 373          */
 374         if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
 375                                      IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
 376                 return;
 377
 378         /* scan status must be locked for proper checking */
 379         lockdep_assert_held(&mvm->mutex);
 380
 381         /* We first check if we were stopping a scan, in which case we
 382          * just clear the stopping flag.  Then we check if it was a
 383          * firmware initiated stop, in which case we need to inform
 384          * mac80211.
 385          * Note that we can have a stopping and a running scan
 386          * simultaneously, but we can't have two different types of
 387          * scans stopping or running at the same time (since LMAC
 388          * doesn't support it).
 389          */
 390
 391         if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
 392                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
 393
 394                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 395                                aborted ? "aborted" : "completed",
 396                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 397                 IWL_DEBUG_SCAN(mvm,
 398                                "Last line %d, Last iteration %d, Time after last iteration %d\n",
 399                                scan_notif->last_schedule_line,
 400                                scan_notif->last_schedule_iteration,
 401                                __le32_to_cpu(scan_notif->time_after_last_iter));
 402
 403                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
 404         } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
 405                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
 406                                aborted ? "aborted" : "completed",
 407                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 408
 409                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
 410         } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
 411                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
 412
 413                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 414                                aborted ? "aborted" : "completed",
 415                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 416                 IWL_DEBUG_SCAN(mvm,
 417                                "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
 418                                scan_notif->last_schedule_line,
 419                                scan_notif->last_schedule_iteration,
 420                                __le32_to_cpu(scan_notif->time_after_last_iter));
 421
 422                 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
 423                 ieee80211_sched_scan_stopped(mvm->hw);
 424                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 425         } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
 426                 struct cfg80211_scan_info info = {
 427                         .aborted = aborted,
 428                 };
 429
 430                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
 431                                aborted ? "aborted" : "completed",
 432                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 433
 434                 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
 435                 ieee80211_scan_completed(mvm->hw, &info);
 436                 cancel_delayed_work(&mvm->scan_timeout_dwork);
 437                 iwl_mvm_resume_tcm(mvm);
 438         } else {
 439                 IWL_ERR(mvm,
 440                         "got scan complete notification but no scan is running\n");
 441         }
 442
 443         mvm->last_ebs_successful =
 444                         scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
 445                         scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
 446 }
 447
 448 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 449 {
 450         int i;
 451
 452         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 453                 if (!ssid_list[i].len)
 454                         break;
 455                 if (ssid_list[i].len == ssid_len &&
 456                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 457                         return i;
 458         }
 459         return -1;
 460 }
 461
 462 /* We insert the SSIDs in an inverted order, because the FW will
 463  * invert it back.
 464  */
 465 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
 466                                  struct iwl_ssid_ie *ssids,
 467                                  u32 *ssid_bitmap)
 468 {
 469         int i, j;
 470         int index;
 471         u32 tmp_bitmap = 0;
 472
 473         /*
 474          * copy SSIDs from match list.
 475          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 476          * config match list.
 477          */
 478         for (i = 0, j = params->n_match_sets - 1;
 479              j >= 0 && i < PROBE_OPTION_MAX;
 480              i++, j--) {
 481                 /* skip empty SSID matchsets */
 482                 if (!params->match_sets[j].ssid.ssid_len)
 483                         continue;
 484                 ssids[i].id = WLAN_EID_SSID;
 485                 ssids[i].len = params->match_sets[j].ssid.ssid_len;
 486                 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
 487                        ssids[i].len);
 488         }
 489
 490         /* add SSIDs from scan SSID list */
 491         for (j = params->n_ssids - 1;
 492              j >= 0 && i < PROBE_OPTION_MAX;
 493              i++, j--) {
 494                 index = iwl_ssid_exist(params->ssids[j].ssid,
 495                                        params->ssids[j].ssid_len,
 496                                        ssids);
 497                 if (index < 0) {
 498                         ssids[i].id = WLAN_EID_SSID;
 499                         ssids[i].len = params->ssids[j].ssid_len;
 500                         memcpy(ssids[i].ssid, params->ssids[j].ssid,
 501                                ssids[i].len);
 502                         tmp_bitmap |= BIT(i);
 503                 } else {
 504                         tmp_bitmap |= BIT(index);
 505                 }
 506         }
 507         if (ssid_bitmap)
 508                 *ssid_bitmap = tmp_bitmap;
 509 }
 510
 511 static int
 512 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 513                                    struct cfg80211_sched_scan_request *req)
 514 {
 515         struct iwl_scan_offload_profile *profile;
 516         struct iwl_scan_offload_profile_cfg_v1 *profile_cfg_v1;
 517         struct iwl_scan_offload_blocklist *blocklist;
 518         struct iwl_scan_offload_profile_cfg_data *data;
 519         int max_profiles = iwl_umac_scan_get_max_profiles(mvm->fw);
 520         int profile_cfg_size = sizeof(*data) +
 521                 sizeof(*profile) * max_profiles;
 522         struct iwl_host_cmd cmd = {
 523                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 524                 .len[1] = profile_cfg_size,
 525                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 526                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 527         };
 528         int blocklist_len;
 529         int i;
 530         int ret;
 531
 532         if (WARN_ON(req->n_match_sets > max_profiles))
 533                 return -EIO;
 534
 535         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 536                 blocklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 537         else
 538                 blocklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 539
 540         blocklist = kcalloc(blocklist_len, sizeof(*blocklist), GFP_KERNEL);
 541         if (!blocklist)
 542                 return -ENOMEM;
 543
 544         profile_cfg_v1 = kzalloc(profile_cfg_size, GFP_KERNEL);
 545         if (!profile_cfg_v1) {
 546                 ret = -ENOMEM;
 547                 goto free_blocklist;
 548         }
 549
 550         cmd.data[0] = blocklist;
 551         cmd.len[0] = sizeof(*blocklist) * blocklist_len;
 552         cmd.data[1] = profile_cfg_v1;
 553
 554         /* if max_profile is MAX_PROFILES_V2, we have the new API */
 555         if (max_profiles == IWL_SCAN_MAX_PROFILES_V2) {
 556                 struct iwl_scan_offload_profile_cfg *profile_cfg =
 557                         (struct iwl_scan_offload_profile_cfg *)profile_cfg_v1;
 558
 559                 data = &profile_cfg->data;
 560         } else {
 561                 data = &profile_cfg_v1->data;
 562         }
 563
 564         /* No blocklist configuration */
 565         data->num_profiles = req->n_match_sets;
 566         data->active_clients = SCAN_CLIENT_SCHED_SCAN;
 567         data->pass_match = SCAN_CLIENT_SCHED_SCAN;
 568         data->match_notify = SCAN_CLIENT_SCHED_SCAN;
 569
 570         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 571                 data->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 572
 573         for (i = 0; i < req->n_match_sets; i++) {
 574                 profile = &profile_cfg_v1->profiles[i];
 575                 profile->ssid_index = i;
 576                 /* Support any cipher and auth algorithm */
 577                 profile->unicast_cipher = 0xff;
 578                 profile->auth_alg = IWL_AUTH_ALGO_UNSUPPORTED |
 579                         IWL_AUTH_ALGO_NONE | IWL_AUTH_ALGO_PSK | IWL_AUTH_ALGO_8021X |
 580                         IWL_AUTH_ALGO_SAE | IWL_AUTH_ALGO_8021X_SHA384 | IWL_AUTH_ALGO_OWE;
 581                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 582                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 583                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 584         }
 585
 586         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 587
 588         ret = iwl_mvm_send_cmd(mvm, &cmd);
 589         kfree(profile_cfg_v1);
 590 free_blocklist:
 591         kfree(blocklist);
 592
 593         return ret;
 594 }
 595
 596 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
 597                                   struct cfg80211_sched_scan_request *req)
 598 {
 599         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 600                 IWL_DEBUG_SCAN(mvm,
 601                                "Sending scheduled scan with filtering, n_match_sets %d\n",
 602                                req->n_match_sets);
 603                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 604                 return false;
 605         }
 606
 607         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
 608
 609         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 610         return true;
 611 }
 612
 613 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
 614 {
 615         int ret;
 616         struct iwl_host_cmd cmd = {
 617                 .id = SCAN_OFFLOAD_ABORT_CMD,
 618         };
 619         u32 status = CAN_ABORT_STATUS;
 620
 621         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
 622         if (ret)
 623                 return ret;
 624
 625         if (status != CAN_ABORT_STATUS) {
 626                 /*
 627                  * The scan abort will return 1 for success or
 628                  * 2 for "failure".  A failure condition can be
 629                  * due to simply not being in an active scan which
 630                  * can occur if we send the scan abort before the
 631                  * microcode has notified us that a scan is completed.
 632                  */
 633                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
 634                 ret = -ENOENT;
 635         }
 636
 637         return ret;
 638 }
 639
 640 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
 641                                      struct iwl_scan_req_tx_cmd *tx_cmd,
 642                                      bool no_cck)
 643 {
 644         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 645                                          TX_CMD_FLG_BT_DIS);
 646         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 647                                                            NL80211_BAND_2GHZ,
 648                                                            no_cck);
 649
 650         if (!iwl_mvm_has_new_station_api(mvm->fw)) {
 651                 tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
 652                 tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
 653
 654         /*
 655          * Fw doesn't use this sta anymore, pending deprecation via HOST API
 656          * change
 657          */
 658         } else {
 659                 tx_cmd[0].sta_id = 0xff;
 660                 tx_cmd[1].sta_id = 0xff;
 661         }
 662
 663         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 664                                          TX_CMD_FLG_BT_DIS);
 665
 666         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 667                                                            NL80211_BAND_5GHZ,
 668                                                            no_cck);
 669 }
 670
 671 static void
 672 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
 673                                struct ieee80211_channel **channels,
 674                                int n_channels, u32 ssid_bitmap,
 675                                struct iwl_scan_req_lmac *cmd)
 676 {
 677         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
 678         int i;
 679
 680         for (i = 0; i < n_channels; i++) {
 681                 channel_cfg[i].channel_num =
 682                         cpu_to_le16(channels[i]->hw_value);
 683                 channel_cfg[i].iter_count = cpu_to_le16(1);
 684                 channel_cfg[i].iter_interval = 0;
 685                 channel_cfg[i].flags =
 686                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
 687                                     ssid_bitmap);
 688         }
 689 }
 690
 691 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 692                                            size_t len, u8 *const pos)
 693 {
 694         static const u8 before_ds_params[] = {
 695                         WLAN_EID_SSID,
 696                         WLAN_EID_SUPP_RATES,
 697                         WLAN_EID_REQUEST,
 698                         WLAN_EID_EXT_SUPP_RATES,
 699         };
 700         size_t offs;
 701         u8 *newpos = pos;
 702
 703         if (!iwl_mvm_rrm_scan_needed(mvm)) {
 704                 memcpy(newpos, ies, len);
 705                 return newpos + len;
 706         }
 707
 708         offs = ieee80211_ie_split(ies, len,
 709                                   before_ds_params,
 710                                   ARRAY_SIZE(before_ds_params),
 711                                   0);
 712
 713         memcpy(newpos, ies, offs);
 714         newpos += offs;
 715
 716         /* Add a placeholder for DS Parameter Set element */
 717         *newpos++ = WLAN_EID_DS_PARAMS;
 718         *newpos++ = 1;
 719         *newpos++ = 0;
 720
 721         memcpy(newpos, ies + offs, len - offs);
 722         newpos += len - offs;
 723
 724         return newpos;
 725 }
 726
 727 #define WFA_TPC_IE_LEN  9
 728
 729 static void iwl_mvm_add_tpc_report_ie(u8 *pos)
 730 {
 731         pos[0] = WLAN_EID_VENDOR_SPECIFIC;
 732         pos[1] = WFA_TPC_IE_LEN - 2;
 733         pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
 734         pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
 735         pos[4] = WLAN_OUI_MICROSOFT & 0xff;
 736         pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
 737         pos[6] = 0;
 738         /* pos[7] - tx power will be inserted by the FW */
 739         pos[7] = 0;
 740         pos[8] = 0;
 741 }
 742
 743 static void
 744 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 745                          struct ieee80211_scan_ies *ies,
 746                          struct iwl_mvm_scan_params *params)
 747 {
 748         struct ieee80211_mgmt *frame = (void *)params->preq.buf;
 749         u8 *pos, *newpos;
 750         const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
 751                 params->mac_addr : NULL;
 752
 753         /*
 754          * Unfortunately, right now the offload scan doesn't support randomising
 755          * within the firmware, so until the firmware API is ready we implement
 756          * it in the driver. This means that the scan iterations won't really be
 757          * random, only when it's restarted, but at least that helps a bit.
 758          */
 759         if (mac_addr)
 760                 get_random_mask_addr(frame->sa, mac_addr,
 761                                      params->mac_addr_mask);
 762         else
 763                 memcpy(frame->sa, vif->addr, ETH_ALEN);
 764
 765         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 766         eth_broadcast_addr(frame->da);
 767         ether_addr_copy(frame->bssid, params->bssid);
 768         frame->seq_ctrl = 0;
 769
 770         pos = frame->u.probe_req.variable;
 771         *pos++ = WLAN_EID_SSID;
 772         *pos++ = 0;
 773
 774         params->preq.mac_header.offset = 0;
 775         params->preq.mac_header.len = cpu_to_le16(24 + 2);
 776
 777         /* Insert ds parameter set element on 2.4 GHz band */
 778         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
 779                                                  ies->ies[NL80211_BAND_2GHZ],
 780                                                  ies->len[NL80211_BAND_2GHZ],
 781                                                  pos);
 782         params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
 783         params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
 784         pos = newpos;
 785
 786         memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
 787                ies->len[NL80211_BAND_5GHZ]);
 788         params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
 789         params->preq.band_data[1].len =
 790                 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
 791         pos += ies->len[NL80211_BAND_5GHZ];
 792
 793         memcpy(pos, ies->ies[NL80211_BAND_6GHZ],
 794                ies->len[NL80211_BAND_6GHZ]);
 795         params->preq.band_data[2].offset = cpu_to_le16(pos - params->preq.buf);
 796         params->preq.band_data[2].len =
 797                 cpu_to_le16(ies->len[NL80211_BAND_6GHZ]);
 798         pos += ies->len[NL80211_BAND_6GHZ];
 799         memcpy(pos, ies->common_ies, ies->common_ie_len);
 800         params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
 801
 802         if (iwl_mvm_rrm_scan_needed(mvm) &&
 803             !fw_has_capa(&mvm->fw->ucode_capa,
 804                          IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
 805                 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
 806                 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
 807                                                            WFA_TPC_IE_LEN);
 808         } else {
 809                 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
 810         }
 811 }
 812
 813 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
 814                                     struct iwl_scan_req_lmac *cmd,
 815                                     struct iwl_mvm_scan_params *params)
 816 {
 817         cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
 818         cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
 819         cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
 820         cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
 821         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
 822         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
 823         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
 824 }
 825
 826 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
 827                                      struct ieee80211_scan_ies *ies,
 828                                      int n_channels)
 829 {
 830         return ((n_ssids <= PROBE_OPTION_MAX) &&
 831                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
 832                 (ies->common_ie_len +
 833                  ies->len[NL80211_BAND_2GHZ] +
 834                  ies->len[NL80211_BAND_5GHZ] <=
 835                  iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
 836 }
 837
 838 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 839                                         struct ieee80211_vif *vif)
 840 {
 841         const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
 842         bool low_latency;
 843
 844         if (iwl_mvm_is_cdb_supported(mvm))
 845                 low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ);
 846         else
 847                 low_latency = iwl_mvm_low_latency(mvm);
 848
 849         /* We can only use EBS if:
 850          *      1. the feature is supported;
 851          *      2. the last EBS was successful;
 852          *      3. if only single scan, the single scan EBS API is supported;
 853          *      4. it's not a p2p find operation.
 854          *      5. we are not in low latency mode,
 855          *         or if fragmented ebs is supported by the FW
 856          */
 857         return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 858                 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
 859                 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 860                 (!low_latency || iwl_mvm_is_frag_ebs_supported(mvm)));
 861 }
 862
 863 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
 864 {
 865         return params->n_scan_plans == 1 &&
 866                 params->scan_plans[0].iterations == 1;
 867 }
 868
 869 static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)
 870 {
 871         return (type == IWL_SCAN_TYPE_FRAGMENTED ||
 872                 type == IWL_SCAN_TYPE_FAST_BALANCE);
 873 }
 874
 875 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 876                                    struct iwl_mvm_scan_params *params,
 877                                    struct ieee80211_vif *vif)
 878 {
 879         int flags = 0;
 880
 881         if (params->n_ssids == 0)
 882                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
 883
 884         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
 885                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
 886
 887         if (iwl_mvm_is_scan_fragmented(params->type))
 888                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 889
 890         if (iwl_mvm_rrm_scan_needed(mvm) &&
 891             fw_has_capa(&mvm->fw->ucode_capa,
 892                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 893                 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 894
 895         if (params->pass_all)
 896                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
 897         else
 898                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
 899
 900 #ifdef CONFIG_IWLWIFI_DEBUGFS
 901         if (mvm->scan_iter_notif_enabled)
 902                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 903 #endif
 904
 905         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
 906                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 907
 908         if (iwl_mvm_is_regular_scan(params) &&
 909             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 910             !iwl_mvm_is_scan_fragmented(params->type))
 911                 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
 912
 913         return flags;
 914 }
 915
 916 static void
 917 iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req,
 918                                   struct iwl_scan_probe_req *src_p_req)
 919 {
 920         int i;
 921
 922         p_req->mac_header = src_p_req->mac_header;
 923         for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++)
 924                 p_req->band_data[i] = src_p_req->band_data[i];
 925         p_req->common_data = src_p_req->common_data;
 926         memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf));
 927 }
 928
 929 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 930                              struct iwl_mvm_scan_params *params)
 931 {
 932         struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
 933         struct iwl_scan_probe_req_v1 *preq =
 934                 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
 935                          mvm->fw->ucode_capa.n_scan_channels);
 936         u32 ssid_bitmap = 0;
 937         int i;
 938         u8 band;
 939
 940         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
 941                 return -EINVAL;
 942
 943         iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
 944
 945         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
 946         cmd->iter_num = cpu_to_le32(1);
 947         cmd->n_channels = (u8)params->n_channels;
 948
 949         cmd->delay = cpu_to_le32(params->delay);
 950
 951         cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
 952                                                               vif));
 953
 954         band = iwl_mvm_phy_band_from_nl80211(params->channels[0]->band);
 955         cmd->flags = cpu_to_le32(band);
 956         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 957                                         MAC_FILTER_IN_BEACON);
 958         iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
 959         iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
 960
 961         /* this API uses bits 1-20 instead of 0-19 */
 962         ssid_bitmap <<= 1;
 963
 964         for (i = 0; i < params->n_scan_plans; i++) {
 965                 struct cfg80211_sched_scan_plan *scan_plan =
 966                         &params->scan_plans[i];
 967
 968                 cmd->schedule[i].delay =
 969                         cpu_to_le16(scan_plan->interval);
 970                 cmd->schedule[i].iterations = scan_plan->iterations;
 971                 cmd->schedule[i].full_scan_mul = 1;
 972         }
 973
 974         /*
 975          * If the number of iterations of the last scan plan is set to
 976          * zero, it should run infinitely. However, this is not always the case.
 977          * For example, when regular scan is requested the driver sets one scan
 978          * plan with one iteration.
 979          */
 980         if (!cmd->schedule[i - 1].iterations)
 981                 cmd->schedule[i - 1].iterations = 0xff;
 982
 983         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
 984                 cmd->channel_opt[0].flags =
 985                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 986                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 987                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 988                 cmd->channel_opt[0].non_ebs_ratio =
 989                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
 990                 cmd->channel_opt[1].flags =
 991                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 992                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 993                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 994                 cmd->channel_opt[1].non_ebs_ratio =
 995                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
 996         }
 997
 998         iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
 999                                        params->n_channels, ssid_bitmap, cmd);
1000
1001         iwl_mvm_scan_set_legacy_probe_req(preq, &params->preq);
1002
1003         return 0;
1004 }
1005
1006 static int rate_to_scan_rate_flag(unsigned int rate)
1007 {
1008         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1009                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
1010                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
1011                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
1012                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
1013                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
1014                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
1015                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
1016                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
1017                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
1018                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
1019                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
1020                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
1021         };
1022
1023         return rate_to_scan_rate[rate];
1024 }
1025
1026 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1027 {
1028         struct ieee80211_supported_band *band;
1029         unsigned int rates = 0;
1030         int i;
1031
1032         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1033         for (i = 0; i < band->n_bitrates; i++)
1034                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1035         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1036         for (i = 0; i < band->n_bitrates; i++)
1037                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1038
1039         /* Set both basic rates and supported rates */
1040         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1041
1042         return cpu_to_le32(rates);
1043 }
1044
1045 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
1046                                     struct iwl_scan_dwell *dwell)
1047 {
1048         dwell->active = IWL_SCAN_DWELL_ACTIVE;
1049         dwell->passive = IWL_SCAN_DWELL_PASSIVE;
1050         dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
1051         dwell->extended = IWL_SCAN_DWELL_EXTENDED;
1052 }
1053
1054 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels,
1055                                   u32 max_channels)
1056 {
1057         struct ieee80211_supported_band *band;
1058         int i, j = 0;
1059
1060         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1061         for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1062                 channels[j] = band->channels[i].hw_value;
1063         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1064         for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1065                 channels[j] = band->channels[i].hw_value;
1066 }
1067
1068 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
1069                                         u32 flags, u8 channel_flags,
1070                                         u32 max_channels)
1071 {
1072         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL);
1073         struct iwl_scan_config_v1 *cfg = config;
1074
1075         cfg->flags = cpu_to_le32(flags);
1076         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1077         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1078         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1079         cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
1080         cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
1081
1082         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1083
1084         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1085
1086         /* This function should not be called when using ADD_STA ver >=12 */
1087         WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
1088
1089         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1090         cfg->channel_flags = channel_flags;
1091
1092         iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1093 }
1094
1095 static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config,
1096                                         u32 flags, u8 channel_flags,
1097                                         u32 max_channels)
1098 {
1099         struct iwl_scan_config_v2 *cfg = config;
1100
1101         cfg->flags = cpu_to_le32(flags);
1102         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1103         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1104         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1105
1106         if (iwl_mvm_is_cdb_supported(mvm)) {
1107                 enum iwl_mvm_scan_type lb_type, hb_type;
1108
1109                 lb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1110                                                      NL80211_BAND_2GHZ);
1111                 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1112                                                      NL80211_BAND_5GHZ);
1113
1114                 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1115                         cpu_to_le32(scan_timing[lb_type].max_out_time);
1116                 cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1117                         cpu_to_le32(scan_timing[lb_type].suspend_time);
1118
1119                 cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] =
1120                         cpu_to_le32(scan_timing[hb_type].max_out_time);
1121                 cfg->suspend_time[SCAN_HB_LMAC_IDX] =
1122                         cpu_to_le32(scan_timing[hb_type].suspend_time);
1123         } else {
1124                 enum iwl_mvm_scan_type type =
1125                         iwl_mvm_get_scan_type(mvm, NULL);
1126
1127                 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1128                         cpu_to_le32(scan_timing[type].max_out_time);
1129                 cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1130                         cpu_to_le32(scan_timing[type].suspend_time);
1131         }
1132
1133         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1134
1135         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1136
1137         /* This function should not be called when using ADD_STA ver >=12 */
1138         WARN_ON_ONCE(iwl_mvm_has_new_station_api(mvm->fw));
1139
1140         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1141         cfg->channel_flags = channel_flags;
1142
1143         iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1144 }
1145
1146 static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
1147 {
1148         void *cfg;
1149         int ret, cmd_size;
1150         struct iwl_host_cmd cmd = {
1151                 .id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1152         };
1153         enum iwl_mvm_scan_type type;
1154         enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET;
1155         int num_channels =
1156                 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1157                 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1158         u32 flags;
1159         u8 channel_flags;
1160
1161         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1162                 num_channels = mvm->fw->ucode_capa.n_scan_channels;
1163
1164         if (iwl_mvm_is_cdb_supported(mvm)) {
1165                 type = iwl_mvm_get_scan_type_band(mvm, NULL,
1166                                                   NL80211_BAND_2GHZ);
1167                 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1168                                                      NL80211_BAND_5GHZ);
1169                 if (type == mvm->scan_type && hb_type == mvm->hb_scan_type)
1170                         return 0;
1171         } else {
1172                 type = iwl_mvm_get_scan_type(mvm, NULL);
1173                 if (type == mvm->scan_type)
1174                         return 0;
1175         }
1176
1177         if (iwl_mvm_cdb_scan_api(mvm))
1178                 cmd_size = sizeof(struct iwl_scan_config_v2);
1179         else
1180                 cmd_size = sizeof(struct iwl_scan_config_v1);
1181         cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1182
1183         cfg = kzalloc(cmd_size, GFP_KERNEL);
1184         if (!cfg)
1185                 return -ENOMEM;
1186
1187         flags = SCAN_CONFIG_FLAG_ACTIVATE |
1188                  SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1189                  SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1190                  SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1191                  SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1192                  SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1193                  SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1194                  SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1195                  SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1196                  SCAN_CONFIG_N_CHANNELS(num_channels) |
1197                  (iwl_mvm_is_scan_fragmented(type) ?
1198                   SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1199                   SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1200
1201         channel_flags = IWL_CHANNEL_FLAG_EBS |
1202                         IWL_CHANNEL_FLAG_ACCURATE_EBS |
1203                         IWL_CHANNEL_FLAG_EBS_ADD |
1204                         IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1205
1206         /*
1207          * Check for fragmented scan on LMAC2 - high band.
1208          * LMAC1 - low band is checked above.
1209          */
1210         if (iwl_mvm_cdb_scan_api(mvm)) {
1211                 if (iwl_mvm_is_cdb_supported(mvm))
1212                         flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ?
1213                                  SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1214                                  SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1215                 iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags,
1216                                             num_channels);
1217         } else {
1218                 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags,
1219                                             num_channels);
1220         }
1221
1222         cmd.data[0] = cfg;
1223         cmd.len[0] = cmd_size;
1224         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1225
1226         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1227
1228         ret = iwl_mvm_send_cmd(mvm, &cmd);
1229         if (!ret) {
1230                 mvm->scan_type = type;
1231                 mvm->hb_scan_type = hb_type;
1232         }
1233
1234         kfree(cfg);
1235         return ret;
1236 }
1237
1238 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1239 {
1240         struct iwl_scan_config cfg;
1241         struct iwl_host_cmd cmd = {
1242                 .id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_CFG_CMD),
1243                 .len[0] = sizeof(cfg),
1244                 .data[0] = &cfg,
1245                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1246         };
1247
1248         if (!iwl_mvm_is_reduced_config_scan_supported(mvm))
1249                 return iwl_mvm_legacy_config_scan(mvm);
1250
1251         memset(&cfg, 0, sizeof(cfg));
1252
1253         if (!iwl_mvm_has_new_station_api(mvm->fw)) {
1254                 cfg.bcast_sta_id = mvm->aux_sta.sta_id;
1255         } else if (iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_CFG_CMD, 0) < 5) {
1256                 /*
1257                  * Fw doesn't use this sta anymore. Deprecated on SCAN_CFG_CMD
1258                  * version 5.
1259                  */
1260                 cfg.bcast_sta_id = 0xff;
1261         }
1262
1263         cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1264         cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1265
1266         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1267
1268         return iwl_mvm_send_cmd(mvm, &cmd);
1269 }
1270
1271 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1272 {
1273         int i;
1274
1275         for (i = 0; i < mvm->max_scans; i++)
1276                 if (mvm->scan_uid_status[i] == status)
1277                         return i;
1278
1279         return -ENOENT;
1280 }
1281
1282 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1283                                     struct iwl_scan_req_umac *cmd,
1284                                     struct iwl_mvm_scan_params *params)
1285 {
1286         struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1287         u8 active_dwell, passive_dwell;
1288
1289         timing = &scan_timing[params->type];
1290         active_dwell = IWL_SCAN_DWELL_ACTIVE;
1291         passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1292
1293         if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1294                 cmd->v7.adwell_default_n_aps_social =
1295                         IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1296                 cmd->v7.adwell_default_n_aps =
1297                         IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1298
1299                 if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm))
1300                         cmd->v9.adwell_default_hb_n_aps =
1301                                 IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1302
1303                 /* if custom max budget was configured with debugfs */
1304                 if (IWL_MVM_ADWELL_MAX_BUDGET)
1305                         cmd->v7.adwell_max_budget =
1306                                 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1307                 else if (params->ssids && params->ssids[0].ssid_len)
1308                         cmd->v7.adwell_max_budget =
1309                                 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1310                 else
1311                         cmd->v7.adwell_max_budget =
1312                                 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1313
1314                 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1315                 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1316                         cpu_to_le32(timing->max_out_time);
1317                 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1318                         cpu_to_le32(timing->suspend_time);
1319
1320                 if (iwl_mvm_is_cdb_supported(mvm)) {
1321                         hb_timing = &scan_timing[params->hb_type];
1322
1323                         cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1324                                 cpu_to_le32(hb_timing->max_out_time);
1325                         cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1326                                 cpu_to_le32(hb_timing->suspend_time);
1327                 }
1328
1329                 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1330                         cmd->v7.active_dwell = active_dwell;
1331                         cmd->v7.passive_dwell = passive_dwell;
1332                         cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1333                 } else {
1334                         cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1335                         cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1336                         if (iwl_mvm_is_cdb_supported(mvm)) {
1337                                 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
1338                                         active_dwell;
1339                                 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
1340                                         passive_dwell;
1341                         }
1342                 }
1343         } else {
1344                 cmd->v1.extended_dwell = IWL_SCAN_DWELL_EXTENDED;
1345                 cmd->v1.active_dwell = active_dwell;
1346                 cmd->v1.passive_dwell = passive_dwell;
1347                 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1348
1349                 if (iwl_mvm_is_cdb_supported(mvm)) {
1350                         hb_timing = &scan_timing[params->hb_type];
1351
1352                         cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1353                                         cpu_to_le32(hb_timing->max_out_time);
1354                         cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1355                                         cpu_to_le32(hb_timing->suspend_time);
1356                 }
1357
1358                 if (iwl_mvm_cdb_scan_api(mvm)) {
1359                         cmd->v6.scan_priority =
1360                                 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1361                         cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1362                                 cpu_to_le32(timing->max_out_time);
1363                         cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1364                                 cpu_to_le32(timing->suspend_time);
1365                 } else {
1366                         cmd->v1.scan_priority =
1367                                 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1368                         cmd->v1.max_out_time =
1369                                 cpu_to_le32(timing->max_out_time);
1370                         cmd->v1.suspend_time =
1371                                 cpu_to_le32(timing->suspend_time);
1372                 }
1373         }
1374
1375         if (iwl_mvm_is_regular_scan(params))
1376                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1377         else
1378                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1379 }
1380
1381 static u32 iwl_mvm_scan_umac_ooc_priority(struct iwl_mvm_scan_params *params)
1382 {
1383         return iwl_mvm_is_regular_scan(params) ?
1384                 IWL_SCAN_PRIORITY_EXT_6 :
1385                 IWL_SCAN_PRIORITY_EXT_2;
1386 }
1387
1388 static void
1389 iwl_mvm_scan_umac_dwell_v11(struct iwl_mvm *mvm,
1390                             struct iwl_scan_general_params_v11 *general_params,
1391                             struct iwl_mvm_scan_params *params)
1392 {
1393         struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1394         u8 active_dwell, passive_dwell;
1395
1396         timing = &scan_timing[params->type];
1397         active_dwell = IWL_SCAN_DWELL_ACTIVE;
1398         passive_dwell = IWL_SCAN_DWELL_PASSIVE;
1399
1400         general_params->adwell_default_social_chn =
1401                 IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1402         general_params->adwell_default_2g = IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1403         general_params->adwell_default_5g = IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1404
1405         /* if custom max budget was configured with debugfs */
1406         if (IWL_MVM_ADWELL_MAX_BUDGET)
1407                 general_params->adwell_max_budget =
1408                         cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1409         else if (params->ssids && params->ssids[0].ssid_len)
1410                 general_params->adwell_max_budget =
1411                         cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1412         else
1413                 general_params->adwell_max_budget =
1414                         cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1415
1416         general_params->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1417         general_params->max_out_of_time[SCAN_LB_LMAC_IDX] =
1418                 cpu_to_le32(timing->max_out_time);
1419         general_params->suspend_time[SCAN_LB_LMAC_IDX] =
1420                 cpu_to_le32(timing->suspend_time);
1421
1422         hb_timing = &scan_timing[params->hb_type];
1423
1424         general_params->max_out_of_time[SCAN_HB_LMAC_IDX] =
1425                 cpu_to_le32(hb_timing->max_out_time);
1426         general_params->suspend_time[SCAN_HB_LMAC_IDX] =
1427                 cpu_to_le32(hb_timing->suspend_time);
1428
1429         general_params->active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1430         general_params->passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1431         general_params->active_dwell[SCAN_HB_LMAC_IDX] = active_dwell;
1432         general_params->passive_dwell[SCAN_HB_LMAC_IDX] = passive_dwell;
1433 }
1434
1435 struct iwl_mvm_scan_channel_segment {
1436         u8 start_idx;
1437         u8 end_idx;
1438         u8 first_channel_id;
1439         u8 last_channel_id;
1440         u8 channel_spacing_shift;
1441         u8 band;
1442 };
1443
1444 static const struct iwl_mvm_scan_channel_segment scan_channel_segments[] = {
1445         {
1446                 .start_idx = 0,
1447                 .end_idx = 13,
1448                 .first_channel_id = 1,
1449                 .last_channel_id = 14,
1450                 .channel_spacing_shift = 0,
1451                 .band = PHY_BAND_24
1452         },
1453         {
1454                 .start_idx = 14,
1455                 .end_idx = 41,
1456                 .first_channel_id = 36,
1457                 .last_channel_id = 144,
1458                 .channel_spacing_shift = 2,
1459                 .band = PHY_BAND_5
1460         },
1461         {
1462                 .start_idx = 42,
1463                 .end_idx = 50,
1464                 .first_channel_id = 149,
1465                 .last_channel_id = 181,
1466                 .channel_spacing_shift = 2,
1467                 .band = PHY_BAND_5
1468         },
1469         {
1470                 .start_idx = 51,
1471                 .end_idx = 111,
1472                 .first_channel_id = 1,
1473                 .last_channel_id = 241,
1474                 .channel_spacing_shift = 2,
1475                 .band = PHY_BAND_6
1476         },
1477 };
1478
1479 static int iwl_mvm_scan_ch_and_band_to_idx(u8 channel_id, u8 band)
1480 {
1481         int i, index;
1482
1483         if (!channel_id)
1484                 return -EINVAL;
1485
1486         for (i = 0; i < ARRAY_SIZE(scan_channel_segments); i++) {
1487                 const struct iwl_mvm_scan_channel_segment *ch_segment =
1488                         &scan_channel_segments[i];
1489                 u32 ch_offset;
1490
1491                 if (ch_segment->band != band ||
1492                     ch_segment->first_channel_id > channel_id ||
1493                     ch_segment->last_channel_id < channel_id)
1494                         continue;
1495
1496                 ch_offset = (channel_id - ch_segment->first_channel_id) >>
1497                         ch_segment->channel_spacing_shift;
1498
1499                 index = scan_channel_segments[i].start_idx + ch_offset;
1500                 if (index < IWL_SCAN_NUM_CHANNELS)
1501                         return index;
1502
1503                 break;
1504         }
1505
1506         return -EINVAL;
1507 }
1508
1509 static const u8 p2p_go_friendly_chs[] = {
1510         36, 40, 44, 48, 149, 153, 157, 161, 165,
1511 };
1512
1513 static const u8 social_chs[] = {
1514         1, 6, 11
1515 };
1516
1517 static void iwl_mvm_scan_ch_add_n_aps_override(enum nl80211_iftype vif_type,
1518                                                u8 ch_id, u8 band, u8 *ch_bitmap,
1519                                                size_t bitmap_n_entries)
1520 {
1521         int i;
1522
1523         if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1524                 return;
1525
1526         for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1527                 if (p2p_go_friendly_chs[i] == ch_id) {
1528                         int ch_idx, bitmap_idx;
1529
1530                         ch_idx = iwl_mvm_scan_ch_and_band_to_idx(ch_id, band);
1531                         if (ch_idx < 0)
1532                                 return;
1533
1534                         bitmap_idx = ch_idx / 8;
1535                         if (bitmap_idx >= bitmap_n_entries)
1536                                 return;
1537
1538                         ch_idx = ch_idx % 8;
1539                         ch_bitmap[bitmap_idx] |= BIT(ch_idx);
1540
1541                         return;
1542                 }
1543         }
1544 }
1545
1546 static u32 iwl_mvm_scan_ch_n_aps_flag(enum nl80211_iftype vif_type, u8 ch_id)
1547 {
1548         int i;
1549         u32 flags = 0;
1550
1551         if (vif_type != NL80211_IFTYPE_P2P_DEVICE)
1552                 goto out;
1553
1554         for (i = 0; i < ARRAY_SIZE(p2p_go_friendly_chs); i++) {
1555                 if (p2p_go_friendly_chs[i] == ch_id) {
1556                         flags |= IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY_BIT;
1557                         break;
1558                 }
1559         }
1560
1561         if (flags)
1562                 goto out;
1563
1564         for (i = 0; i < ARRAY_SIZE(social_chs); i++) {
1565                 if (social_chs[i] == ch_id) {
1566                         flags |= IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS_BIT;
1567                         break;
1568                 }
1569         }
1570
1571 out:
1572         return flags;
1573 }
1574
1575 static void
1576 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1577                                struct ieee80211_channel **channels,
1578                                int n_channels, u32 flags,
1579                                struct iwl_scan_channel_cfg_umac *channel_cfg)
1580 {
1581         int i;
1582
1583         for (i = 0; i < n_channels; i++) {
1584                 channel_cfg[i].flags = cpu_to_le32(flags);
1585                 channel_cfg[i].v1.channel_num = channels[i]->hw_value;
1586                 if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
1587                         enum nl80211_band band = channels[i]->band;
1588
1589                         channel_cfg[i].v2.band =
1590                                 iwl_mvm_phy_band_from_nl80211(band);
1591                         channel_cfg[i].v2.iter_count = 1;
1592                         channel_cfg[i].v2.iter_interval = 0;
1593                 } else {
1594                         channel_cfg[i].v1.iter_count = 1;
1595                         channel_cfg[i].v1.iter_interval = 0;
1596                 }
1597         }
1598 }
1599
1600 static void
1601 iwl_mvm_umac_scan_cfg_channels_v4(struct iwl_mvm *mvm,
1602                                   struct ieee80211_channel **channels,
1603                                   struct iwl_scan_channel_params_v4 *cp,
1604                                   int n_channels, u32 flags,
1605                                   enum nl80211_iftype vif_type)
1606 {
1607         u8 *bitmap = cp->adwell_ch_override_bitmap;
1608         size_t bitmap_n_entries = ARRAY_SIZE(cp->adwell_ch_override_bitmap);
1609         int i;
1610
1611         for (i = 0; i < n_channels; i++) {
1612                 enum nl80211_band band = channels[i]->band;
1613                 struct iwl_scan_channel_cfg_umac *cfg =
1614                         &cp->channel_config[i];
1615
1616                 cfg->flags = cpu_to_le32(flags);
1617                 cfg->v2.channel_num = channels[i]->hw_value;
1618                 cfg->v2.band = iwl_mvm_phy_band_from_nl80211(band);
1619                 cfg->v2.iter_count = 1;
1620                 cfg->v2.iter_interval = 0;
1621
1622                 iwl_mvm_scan_ch_add_n_aps_override(vif_type,
1623                                                    cfg->v2.channel_num,
1624                                                    cfg->v2.band, bitmap,
1625                                                    bitmap_n_entries);
1626         }
1627 }
1628
1629 static void
1630 iwl_mvm_umac_scan_cfg_channels_v7(struct iwl_mvm *mvm,
1631                                   struct ieee80211_channel **channels,
1632                                   struct iwl_scan_channel_params_v7 *cp,
1633                                   int n_channels, u32 flags,
1634                                   enum nl80211_iftype vif_type, u32 version)
1635 {
1636         int i;
1637
1638         for (i = 0; i < n_channels; i++) {
1639                 enum nl80211_band band = channels[i]->band;
1640                 struct iwl_scan_channel_cfg_umac *cfg = &cp->channel_config[i];
1641                 u32 n_aps_flag =
1642                         iwl_mvm_scan_ch_n_aps_flag(vif_type,
1643                                                    channels[i]->hw_value);
1644                 u8 iwl_band = iwl_mvm_phy_band_from_nl80211(band);
1645
1646                 cfg->flags = cpu_to_le32(flags | n_aps_flag);
1647                 cfg->v2.channel_num = channels[i]->hw_value;
1648                 if (cfg80211_channel_is_psc(channels[i]))
1649                         cfg->flags = 0;
1650                 cfg->v2.iter_count = 1;
1651                 cfg->v2.iter_interval = 0;
1652                 if (version < 17)
1653                         cfg->v2.band = iwl_band;
1654                 else
1655                         cfg->flags |= cpu_to_le32((iwl_band <<
1656                                                    IWL_CHAN_CFG_FLAGS_BAND_POS));
1657         }
1658 }
1659
1660 static void
1661 iwl_mvm_umac_scan_fill_6g_chan_list(struct iwl_mvm *mvm,
1662                                     struct iwl_mvm_scan_params *params,
1663                                      struct iwl_scan_probe_params_v4 *pp)
1664 {
1665         int j, idex_s = 0, idex_b = 0;
1666         struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1667                 params->scan_6ghz_params;
1668         bool hidden_supported = fw_has_capa(&mvm->fw->ucode_capa,
1669                                             IWL_UCODE_TLV_CAPA_HIDDEN_6GHZ_SCAN);
1670
1671         for (j = 0; j < params->n_ssids && idex_s < SCAN_SHORT_SSID_MAX_SIZE;
1672              j++) {
1673                 if (!params->ssids[j].ssid_len)
1674                         continue;
1675
1676                 pp->short_ssid[idex_s] =
1677                         cpu_to_le32(~crc32_le(~0, params->ssids[j].ssid,
1678                                               params->ssids[j].ssid_len));
1679
1680                 if (hidden_supported) {
1681                         pp->direct_scan[idex_s].id = WLAN_EID_SSID;
1682                         pp->direct_scan[idex_s].len = params->ssids[j].ssid_len;
1683                         memcpy(pp->direct_scan[idex_s].ssid, params->ssids[j].ssid,
1684                                params->ssids[j].ssid_len);
1685                 }
1686                 idex_s++;
1687         }
1688
1689         /*
1690          * Populate the arrays of the short SSIDs and the BSSIDs using the 6GHz
1691          * collocated parameters. This might not be optimal, as this processing
1692          * does not (yet) correspond to the actual channels, so it is possible
1693          * that some entries would be left out.
1694          *
1695          * TODO: improve this logic.
1696          */
1697         for (j = 0; j < params->n_6ghz_params; j++) {
1698                 int k;
1699
1700                 /* First, try to place the short SSID */
1701                 if (scan_6ghz_params[j].short_ssid_valid) {
1702                         for (k = 0; k < idex_s; k++) {
1703                                 if (pp->short_ssid[k] ==
1704                                     cpu_to_le32(scan_6ghz_params[j].short_ssid))
1705                                         break;
1706                         }
1707
1708                         if (k == idex_s && idex_s < SCAN_SHORT_SSID_MAX_SIZE) {
1709                                 pp->short_ssid[idex_s++] =
1710                                         cpu_to_le32(scan_6ghz_params[j].short_ssid);
1711                         }
1712                 }
1713
1714                 /* try to place BSSID for the same entry */
1715                 for (k = 0; k < idex_b; k++) {
1716                         if (!memcmp(&pp->bssid_array[k],
1717                                     scan_6ghz_params[j].bssid, ETH_ALEN))
1718                                 break;
1719                 }
1720
1721                 if (k == idex_b && idex_b < SCAN_BSSID_MAX_SIZE) {
1722                         memcpy(&pp->bssid_array[idex_b++],
1723                                scan_6ghz_params[j].bssid, ETH_ALEN);
1724                 }
1725         }
1726
1727         pp->short_ssid_num = idex_s;
1728         pp->bssid_num = idex_b;
1729 }
1730
1731 /* TODO: this function can be merged with iwl_mvm_scan_umac_fill_ch_p_v7 */
1732 static u32
1733 iwl_mvm_umac_scan_cfg_channels_v7_6g(struct iwl_mvm *mvm,
1734                                      struct iwl_mvm_scan_params *params,
1735                                      u32 n_channels,
1736                                      struct iwl_scan_probe_params_v4 *pp,
1737                                      struct iwl_scan_channel_params_v7 *cp,
1738                                      enum nl80211_iftype vif_type,
1739                                      u32 version)
1740 {
1741         int i;
1742         struct cfg80211_scan_6ghz_params *scan_6ghz_params =
1743                 params->scan_6ghz_params;
1744         u32 ch_cnt;
1745
1746         for (i = 0, ch_cnt = 0; i < params->n_channels; i++) {
1747                 struct iwl_scan_channel_cfg_umac *cfg =
1748                         &cp->channel_config[ch_cnt];
1749
1750                 u32 s_ssid_bitmap = 0, bssid_bitmap = 0, flags = 0;
1751                 u8 j, k, s_max = 0, b_max = 0, n_used_bssid_entries;
1752                 bool force_passive, found = false, allow_passive = true,
1753                      unsolicited_probe_on_chan = false, psc_no_listen = false;
1754                 s8 psd_20 = IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
1755
1756                 /*
1757                  * Avoid performing passive scan on non PSC channels unless the
1758                  * scan is specifically a passive scan, i.e., no SSIDs
1759                  * configured in the scan command.
1760                  */
1761                 if (!cfg80211_channel_is_psc(params->channels[i]) &&
1762                     !params->n_6ghz_params && params->n_ssids)
1763                         continue;
1764
1765                 cfg->v1.channel_num = params->channels[i]->hw_value;
1766                 if (version < 17)
1767                         cfg->v2.band = PHY_BAND_6;
1768                 else
1769                         cfg->flags |= cpu_to_le32(PHY_BAND_6 <<
1770                                                   IWL_CHAN_CFG_FLAGS_BAND_POS);
1771
1772                 cfg->v5.iter_count = 1;
1773                 cfg->v5.iter_interval = 0;
1774
1775                 /*
1776                  * The optimize the scan time, i.e., reduce the scan dwell time
1777                  * on each channel, the below logic tries to set 3 direct BSSID
1778                  * probe requests for each broadcast probe request with a short
1779                  * SSID.
1780                  * TODO: improve this logic
1781                  */
1782                 n_used_bssid_entries = 3;
1783                 for (j = 0; j < params->n_6ghz_params; j++) {
1784                         s8 tmp_psd_20;
1785
1786                         if (!(scan_6ghz_params[j].channel_idx == i))
1787                                 continue;
1788
1789                         /* Use the highest PSD value allowed as advertised by
1790                          * APs for this channel
1791                          */
1792                         tmp_psd_20 = scan_6ghz_params[j].psd_20;
1793                         if (tmp_psd_20 !=
1794                             IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED &&
1795                             (psd_20 ==
1796                              IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED ||
1797                              psd_20 < tmp_psd_20))
1798                                 psd_20 = tmp_psd_20;
1799
1800                         found = false;
1801                         unsolicited_probe_on_chan |=
1802                                 scan_6ghz_params[j].unsolicited_probe;
1803                         psc_no_listen |= scan_6ghz_params[j].psc_no_listen;
1804
1805                         for (k = 0; k < pp->short_ssid_num; k++) {
1806                                 if (!scan_6ghz_params[j].unsolicited_probe &&
1807                                     le32_to_cpu(pp->short_ssid[k]) ==
1808                                     scan_6ghz_params[j].short_ssid) {
1809                                         /* Relevant short SSID bit set */
1810                                         if (s_ssid_bitmap & BIT(k)) {
1811                                                 found = true;
1812                                                 break;
1813                                         }
1814
1815                                         /*
1816                                          * Use short SSID only to create a new
1817                                          * iteration during channel dwell or in
1818                                          * case that the short SSID has a
1819                                          * matching SSID, i.e., scan for hidden
1820                                          * APs.
1821                                          */
1822                                         if (n_used_bssid_entries >= 3) {
1823                                                 s_ssid_bitmap |= BIT(k);
1824                                                 s_max++;
1825                                                 n_used_bssid_entries -= 3;
1826                                                 found = true;
1827                                                 break;
1828                                         } else if (pp->direct_scan[k].len) {
1829                                                 s_ssid_bitmap |= BIT(k);
1830                                                 s_max++;
1831                                                 found = true;
1832                                                 allow_passive = false;
1833                                                 break;
1834                                         }
1835                                 }
1836                         }
1837
1838                         if (found)
1839                                 continue;
1840
1841                         for (k = 0; k < pp->bssid_num; k++) {
1842                                 if (!memcmp(&pp->bssid_array[k],
1843                                             scan_6ghz_params[j].bssid,
1844                                             ETH_ALEN)) {
1845                                         if (!(bssid_bitmap & BIT(k))) {
1846                                                 bssid_bitmap |= BIT(k);
1847                                                 b_max++;
1848                                                 n_used_bssid_entries++;
1849                                         }
1850                                         break;
1851                                 }
1852                         }
1853                 }
1854
1855                 if (cfg80211_channel_is_psc(params->channels[i]) &&
1856                     psc_no_listen)
1857                         flags |= IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN;
1858
1859                 if (unsolicited_probe_on_chan)
1860                         flags |= IWL_UHB_CHAN_CFG_FLAG_UNSOLICITED_PROBE_RES;
1861
1862                 /*
1863                  * In the following cases apply passive scan:
1864                  * 1. Non fragmented scan:
1865                  *      - PSC channel with NO_LISTEN_FLAG on should be treated
1866                  *        like non PSC channel
1867                  *      - Non PSC channel with more than 3 short SSIDs or more
1868                  *        than 9 BSSIDs.
1869                  *      - Non PSC Channel with unsolicited probe response and
1870                  *        more than 2 short SSIDs or more than 6 BSSIDs.
1871                  *      - PSC channel with more than 2 short SSIDs or more than
1872                  *        6 BSSIDs.
1873                  * 3. Fragmented scan:
1874                  *      - PSC channel with more than 1 SSID or 3 BSSIDs.
1875                  *      - Non PSC channel with more than 2 SSIDs or 6 BSSIDs.
1876                  *      - Non PSC channel with unsolicited probe response and
1877                  *        more than 1 SSID or more than 3 BSSIDs.
1878                  */
1879                 if (!iwl_mvm_is_scan_fragmented(params->type)) {
1880                         if (!cfg80211_channel_is_psc(params->channels[i]) ||
1881                             flags & IWL_UHB_CHAN_CFG_FLAG_PSC_CHAN_NO_LISTEN) {
1882                                 force_passive = (s_max > 3 || b_max > 9);
1883                                 force_passive |= (unsolicited_probe_on_chan &&
1884                                                   (s_max > 2 || b_max > 6));
1885                         } else {
1886                                 force_passive = (s_max > 2 || b_max > 6);
1887                         }
1888                 } else if (cfg80211_channel_is_psc(params->channels[i])) {
1889                         force_passive = (s_max > 1 || b_max > 3);
1890                 } else {
1891                         force_passive = (s_max > 2 || b_max > 6);
1892                         force_passive |= (unsolicited_probe_on_chan &&
1893                                           (s_max > 1 || b_max > 3));
1894                 }
1895                 if ((allow_passive && force_passive) ||
1896                     (!(bssid_bitmap | s_ssid_bitmap) &&
1897                      !cfg80211_channel_is_psc(params->channels[i])))
1898                         flags |= IWL_UHB_CHAN_CFG_FLAG_FORCE_PASSIVE;
1899                 else
1900                         flags |= bssid_bitmap | (s_ssid_bitmap << 16);
1901
1902                 cfg->flags |= cpu_to_le32(flags);
1903                 if (version >= 17)
1904                         cfg->v5.psd_20 = psd_20;
1905
1906                 ch_cnt++;
1907         }
1908
1909         if (params->n_channels > ch_cnt)
1910                 IWL_DEBUG_SCAN(mvm,
1911                                "6GHz: reducing number channels: (%u->%u)\n",
1912                                params->n_channels, ch_cnt);
1913
1914         return ch_cnt;
1915 }
1916
1917 static u8 iwl_mvm_scan_umac_chan_flags_v2(struct iwl_mvm *mvm,
1918                                           struct iwl_mvm_scan_params *params,
1919                                           struct ieee80211_vif *vif)
1920 {
1921         u8 flags = 0;
1922
1923         flags |= IWL_SCAN_CHANNEL_FLAG_ENABLE_CHAN_ORDER;
1924
1925         if (iwl_mvm_scan_use_ebs(mvm, vif))
1926                 flags |= IWL_SCAN_CHANNEL_FLAG_EBS |
1927                         IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1928                         IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1929
1930         /* set fragmented ebs for fragmented scan on HB channels */
1931         if ((!iwl_mvm_is_cdb_supported(mvm) &&
1932              iwl_mvm_is_scan_fragmented(params->type)) ||
1933             (iwl_mvm_is_cdb_supported(mvm) &&
1934              iwl_mvm_is_scan_fragmented(params->hb_type)))
1935                 flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
1936
1937         /*
1938          * force EBS in case the scan is a fragmented and there is a need to take P2P
1939          * GO operation into consideration during scan operation.
1940          */
1941         if ((!iwl_mvm_is_cdb_supported(mvm) &&
1942              iwl_mvm_is_scan_fragmented(params->type) && params->respect_p2p_go) ||
1943             (iwl_mvm_is_cdb_supported(mvm) &&
1944              iwl_mvm_is_scan_fragmented(params->hb_type) &&
1945              params->respect_p2p_go_hb)) {
1946                 IWL_DEBUG_SCAN(mvm, "Respect P2P GO. Force EBS\n");
1947                 flags |= IWL_SCAN_CHANNEL_FLAG_FORCE_EBS;
1948         }
1949
1950         return flags;
1951 }
1952
1953 static void iwl_mvm_scan_6ghz_passive_scan(struct iwl_mvm *mvm,
1954                                            struct iwl_mvm_scan_params *params,
1955                                            struct ieee80211_vif *vif)
1956 {
1957         struct ieee80211_supported_band *sband =
1958                 &mvm->nvm_data->bands[NL80211_BAND_6GHZ];
1959         u32 n_disabled, i;
1960
1961         params->enable_6ghz_passive = false;
1962
1963         if (params->scan_6ghz)
1964                 return;
1965
1966         if (!fw_has_capa(&mvm->fw->ucode_capa,
1967                          IWL_UCODE_TLV_CAPA_PASSIVE_6GHZ_SCAN)) {
1968                 IWL_DEBUG_SCAN(mvm,
1969                                "6GHz passive scan: Not supported by FW\n");
1970                 return;
1971         }
1972
1973         /* 6GHz passive scan allowed only on station interface  */
1974         if (vif->type != NL80211_IFTYPE_STATION) {
1975                 IWL_DEBUG_SCAN(mvm,
1976                                "6GHz passive scan: not station interface\n");
1977                 return;
1978         }
1979
1980         /*
1981          * 6GHz passive scan is allowed in a defined time interval following HW
1982          * reset or resume flow, or while not associated and a large interval
1983          * has passed since the last 6GHz passive scan.
1984          */
1985         if ((vif->cfg.assoc ||
1986              time_after(mvm->last_6ghz_passive_scan_jiffies +
1987                         (IWL_MVM_6GHZ_PASSIVE_SCAN_TIMEOUT * HZ), jiffies)) &&
1988             (time_before(mvm->last_reset_or_resume_time_jiffies +
1989                          (IWL_MVM_6GHZ_PASSIVE_SCAN_ASSOC_TIMEOUT * HZ),
1990                          jiffies))) {
1991                 IWL_DEBUG_SCAN(mvm, "6GHz passive scan: %s\n",
1992                                vif->cfg.assoc ? "associated" :
1993                                "timeout did not expire");
1994                 return;
1995         }
1996
1997         /* not enough channels in the regular scan request */
1998         if (params->n_channels < IWL_MVM_6GHZ_PASSIVE_SCAN_MIN_CHANS) {
1999                 IWL_DEBUG_SCAN(mvm,
2000                                "6GHz passive scan: not enough channels\n");
2001                 return;
2002         }
2003
2004         for (i = 0; i < params->n_ssids; i++) {
2005                 if (!params->ssids[i].ssid_len)
2006                         break;
2007         }
2008
2009         /* not a wildcard scan, so cannot enable passive 6GHz scan */
2010         if (i == params->n_ssids) {
2011                 IWL_DEBUG_SCAN(mvm,
2012                                "6GHz passive scan: no wildcard SSID\n");
2013                 return;
2014         }
2015
2016         if (!sband || !sband->n_channels) {
2017                 IWL_DEBUG_SCAN(mvm,
2018                                "6GHz passive scan: no 6GHz channels\n");
2019                 return;
2020         }
2021
2022         for (i = 0, n_disabled = 0; i < sband->n_channels; i++) {
2023                 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED))
2024                         n_disabled++;
2025         }
2026
2027         /*
2028          * Not all the 6GHz channels are disabled, so no need for 6GHz passive
2029          * scan
2030          */
2031         if (n_disabled != sband->n_channels) {
2032                 IWL_DEBUG_SCAN(mvm,
2033                                "6GHz passive scan: 6GHz channels enabled\n");
2034                 return;
2035         }
2036
2037         /* all conditions to enable 6ghz passive scan are satisfied */
2038         IWL_DEBUG_SCAN(mvm, "6GHz passive scan: can be enabled\n");
2039         params->enable_6ghz_passive = true;
2040 }
2041
2042 static u16 iwl_mvm_scan_umac_flags_v2(struct iwl_mvm *mvm,
2043                                       struct iwl_mvm_scan_params *params,
2044                                       struct ieee80211_vif *vif,
2045                                       int type)
2046 {
2047         u16 flags = 0;
2048
2049         /*
2050          * If no direct SSIDs are provided perform a passive scan. Otherwise,
2051          * if there is a single SSID which is not the broadcast SSID, assume
2052          * that the scan is intended for roaming purposes and thus enable Rx on
2053          * all chains to improve chances of hearing the beacons/probe responses.
2054          */
2055         if (params->n_ssids == 0)
2056                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FORCE_PASSIVE;
2057         else if (params->n_ssids == 1 && params->ssids[0].ssid_len)
2058                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_USE_ALL_RX_CHAINS;
2059
2060         if (iwl_mvm_is_scan_fragmented(params->type))
2061                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1;
2062
2063         if (iwl_mvm_is_scan_fragmented(params->hb_type))
2064                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2;
2065
2066         if (params->pass_all)
2067                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PASS_ALL;
2068         else
2069                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_MATCH;
2070
2071         if (!iwl_mvm_is_regular_scan(params))
2072                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PERIODIC;
2073
2074         if (params->iter_notif ||
2075             mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2076                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_NTFY_ITER_COMPLETE;
2077
2078         if (IWL_MVM_ADWELL_ENABLE)
2079                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_ADAPTIVE_DWELL;
2080
2081         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2082                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_PREEMPTIVE;
2083
2084         if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2085             params->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ)
2086                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_TRIGGER_UHB_SCAN;
2087
2088         if (params->enable_6ghz_passive)
2089                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_6GHZ_PASSIVE_SCAN;
2090
2091         if (iwl_mvm_is_oce_supported(mvm) &&
2092             (params->flags & (NL80211_SCAN_FLAG_ACCEPT_BCAST_PROBE_RESP |
2093                               NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE |
2094                               NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME)))
2095                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_V2_OCE;
2096
2097         return flags;
2098 }
2099
2100 static u8 iwl_mvm_scan_umac_flags2(struct iwl_mvm *mvm,
2101                                    struct iwl_mvm_scan_params *params,
2102                                    struct ieee80211_vif *vif, int type)
2103 {
2104         u8 flags = 0;
2105
2106         if (iwl_mvm_is_cdb_supported(mvm)) {
2107                 if (params->respect_p2p_go)
2108                         flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB;
2109                 if (params->respect_p2p_go_hb)
2110                         flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2111         } else {
2112                 if (params->respect_p2p_go)
2113                         flags = IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_LB |
2114                                 IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_RESPECT_P2P_GO_HB;
2115         }
2116
2117         if (params->scan_6ghz &&
2118             fw_has_capa(&mvm->fw->ucode_capa,
2119                         IWL_UCODE_TLV_CAPA_SCAN_DONT_TOGGLE_ANT))
2120                 flags |= IWL_UMAC_SCAN_GEN_PARAMS_FLAGS2_DONT_TOGGLE_ANT;
2121
2122         return flags;
2123 }
2124
2125 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
2126                                    struct iwl_mvm_scan_params *params,
2127                                    struct ieee80211_vif *vif)
2128 {
2129         u16 flags = 0;
2130
2131         if (params->n_ssids == 0)
2132                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
2133
2134         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
2135                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
2136
2137         if (iwl_mvm_is_scan_fragmented(params->type))
2138                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
2139
2140         if (iwl_mvm_is_cdb_supported(mvm) &&
2141             iwl_mvm_is_scan_fragmented(params->hb_type))
2142                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
2143
2144         if (iwl_mvm_rrm_scan_needed(mvm) &&
2145             fw_has_capa(&mvm->fw->ucode_capa,
2146                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
2147                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
2148
2149         if (params->pass_all)
2150                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
2151         else
2152                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
2153
2154         if (!iwl_mvm_is_regular_scan(params))
2155                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
2156
2157         if (params->iter_notif)
2158                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2159
2160 #ifdef CONFIG_IWLWIFI_DEBUGFS
2161         if (mvm->scan_iter_notif_enabled)
2162                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2163 #endif
2164
2165         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
2166                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
2167
2168         if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE)
2169                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
2170
2171         /*
2172          * Extended dwell is relevant only for low band to start with, as it is
2173          * being used for social channles only (1, 6, 11), so we can check
2174          * only scan type on low band also for CDB.
2175          */
2176         if (iwl_mvm_is_regular_scan(params) &&
2177             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
2178             !iwl_mvm_is_scan_fragmented(params->type) &&
2179             !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
2180             !iwl_mvm_is_oce_supported(mvm))
2181                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
2182
2183         if (iwl_mvm_is_oce_supported(mvm)) {
2184                 if ((params->flags &
2185                      NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
2186                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
2187                 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
2188                  * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
2189                  * the same bit, we need to make sure that we use this bit here
2190                  * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
2191                  * used. */
2192                 if ((params->flags &
2193                      NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
2194                      !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
2195                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
2196                 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
2197                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
2198         }
2199
2200         return flags;
2201 }
2202
2203 static int
2204 iwl_mvm_fill_scan_sched_params(struct iwl_mvm_scan_params *params,
2205                                struct iwl_scan_umac_schedule *schedule,
2206                                __le16 *delay)
2207 {
2208         int i;
2209         if (WARN_ON(!params->n_scan_plans ||
2210                     params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
2211                 return -EINVAL;
2212
2213         for (i = 0; i < params->n_scan_plans; i++) {
2214                 struct cfg80211_sched_scan_plan *scan_plan =
2215                         &params->scan_plans[i];
2216
2217                 schedule[i].iter_count = scan_plan->iterations;
2218                 schedule[i].interval =
2219                         cpu_to_le16(scan_plan->interval);
2220         }
2221
2222         /*
2223          * If the number of iterations of the last scan plan is set to
2224          * zero, it should run infinitely. However, this is not always the case.
2225          * For example, when regular scan is requested the driver sets one scan
2226          * plan with one iteration.
2227          */
2228         if (!schedule[params->n_scan_plans - 1].iter_count)
2229                 schedule[params->n_scan_plans - 1].iter_count = 0xff;
2230
2231         *delay = cpu_to_le16(params->delay);
2232
2233         return 0;
2234 }
2235
2236 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2237                              struct iwl_mvm_scan_params *params,
2238                              int type, int uid)
2239 {
2240         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
2241         struct iwl_scan_umac_chan_param *chan_param;
2242         void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
2243         void *sec_part = (u8 *)cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) *
2244                 mvm->fw->ucode_capa.n_scan_channels;
2245         struct iwl_scan_req_umac_tail_v2 *tail_v2 =
2246                 (struct iwl_scan_req_umac_tail_v2 *)sec_part;
2247         struct iwl_scan_req_umac_tail_v1 *tail_v1;
2248         struct iwl_ssid_ie *direct_scan;
2249         int ret = 0;
2250         u32 ssid_bitmap = 0;
2251         u8 channel_flags = 0;
2252         u16 gen_flags;
2253         struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2254
2255         chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
2256
2257         iwl_mvm_scan_umac_dwell(mvm, cmd, params);
2258
2259         mvm->scan_uid_status[uid] = type;
2260
2261         cmd->uid = cpu_to_le32(uid);
2262         gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
2263         cmd->general_flags = cpu_to_le16(gen_flags);
2264         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
2265                 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
2266                         cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
2267                                                         IWL_SCAN_NUM_OF_FRAGS;
2268                 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
2269                         cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
2270                                                         IWL_SCAN_NUM_OF_FRAGS;
2271
2272                 cmd->v8.general_flags2 =
2273                         IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER;
2274         }
2275
2276         cmd->scan_start_mac_id = scan_vif->id;
2277
2278         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
2279                 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
2280
2281         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
2282                 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
2283                                 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
2284                                 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
2285
2286                 /* set fragmented ebs for fragmented scan on HB channels */
2287                 if (iwl_mvm_is_frag_ebs_supported(mvm)) {
2288                         if (gen_flags &
2289                             IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED ||
2290                             (!iwl_mvm_is_cdb_supported(mvm) &&
2291                              gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED))
2292                                 channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
2293                 }
2294         }
2295
2296         chan_param->flags = channel_flags;
2297         chan_param->count = params->n_channels;
2298
2299         ret = iwl_mvm_fill_scan_sched_params(params, tail_v2->schedule,
2300                                              &tail_v2->delay);
2301         if (ret) {
2302                 mvm->scan_uid_status[uid] = 0;
2303                 return ret;
2304         }
2305
2306         if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
2307                 tail_v2->preq = params->preq;
2308                 direct_scan = tail_v2->direct_scan;
2309         } else {
2310                 tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part;
2311                 iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq,
2312                                                   &params->preq);
2313                 direct_scan = tail_v1->direct_scan;
2314         }
2315         iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap);
2316         iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
2317                                        params->n_channels, ssid_bitmap,
2318                                        cmd_data);
2319         return 0;
2320 }
2321
2322 static void
2323 iwl_mvm_scan_umac_fill_general_p_v12(struct iwl_mvm *mvm,
2324                                      struct iwl_mvm_scan_params *params,
2325                                      struct ieee80211_vif *vif,
2326                                      struct iwl_scan_general_params_v11 *gp,
2327                                      u16 gen_flags, u8 gen_flags2,
2328                                      u32 version)
2329 {
2330         struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
2331
2332         iwl_mvm_scan_umac_dwell_v11(mvm, gp, params);
2333
2334         IWL_DEBUG_SCAN(mvm, "General: flags=0x%x, flags2=0x%x\n",
2335                        gen_flags, gen_flags2);
2336
2337         gp->flags = cpu_to_le16(gen_flags);
2338         gp->flags2 = gen_flags2;
2339
2340         if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC1)
2341                 gp->num_of_fragments[SCAN_LB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2342         if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_V2_FRAGMENTED_LMAC2)
2343                 gp->num_of_fragments[SCAN_HB_LMAC_IDX] = IWL_SCAN_NUM_OF_FRAGS;
2344
2345         if (version < 16) {
2346                 gp->scan_start_mac_or_link_id = scan_vif->id;
2347         } else {
2348                 struct iwl_mvm_vif_link_info *link_info;
2349                 u8 link_id = 0;
2350
2351                 /* Use one of the active link (if any). In the future it would
2352                  * be possible that the link ID would be part of the scan
2353                  * request coming from upper layers so we would need to use it.
2354                  */
2355                 if (vif->active_links)
2356                         link_id = ffs(vif->active_links) - 1;
2357
2358                 link_info = scan_vif->link[link_id];
2359                 if (!WARN_ON(!link_info))
2360                         gp->scan_start_mac_or_link_id = link_info->fw_link_id;
2361         }
2362 }
2363
2364 static void
2365 iwl_mvm_scan_umac_fill_probe_p_v3(struct iwl_mvm_scan_params *params,
2366                                   struct iwl_scan_probe_params_v3 *pp)
2367 {
2368         pp->preq = params->preq;
2369         pp->ssid_num = params->n_ssids;
2370         iwl_scan_build_ssids(params, pp->direct_scan, NULL);
2371 }
2372
2373 static void
2374 iwl_mvm_scan_umac_fill_probe_p_v4(struct iwl_mvm_scan_params *params,
2375                                   struct iwl_scan_probe_params_v4 *pp,
2376                                   u32 *bitmap_ssid)
2377 {
2378         pp->preq = params->preq;
2379         iwl_scan_build_ssids(params, pp->direct_scan, bitmap_ssid);
2380 }
2381
2382 static void
2383 iwl_mvm_scan_umac_fill_ch_p_v4(struct iwl_mvm *mvm,
2384                                struct iwl_mvm_scan_params *params,
2385                                struct ieee80211_vif *vif,
2386                                struct iwl_scan_channel_params_v4 *cp,
2387                                u32 channel_cfg_flags)
2388 {
2389         cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2390         cp->count = params->n_channels;
2391         cp->num_of_aps_override = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2392
2393         iwl_mvm_umac_scan_cfg_channels_v4(mvm, params->channels, cp,
2394                                           params->n_channels,
2395                                           channel_cfg_flags,
2396                                           vif->type);
2397 }
2398
2399 static void
2400 iwl_mvm_scan_umac_fill_ch_p_v7(struct iwl_mvm *mvm,
2401                                struct iwl_mvm_scan_params *params,
2402                                struct ieee80211_vif *vif,
2403                                struct iwl_scan_channel_params_v7 *cp,
2404                                u32 channel_cfg_flags,
2405                                u32 version)
2406 {
2407         cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2408         cp->count = params->n_channels;
2409         cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2410         cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2411
2412         iwl_mvm_umac_scan_cfg_channels_v7(mvm, params->channels, cp,
2413                                           params->n_channels,
2414                                           channel_cfg_flags,
2415                                           vif->type, version);
2416
2417         if (params->enable_6ghz_passive) {
2418                 struct ieee80211_supported_band *sband =
2419                         &mvm->nvm_data->bands[NL80211_BAND_6GHZ];
2420                 u32 i;
2421
2422                 for (i = 0; i < sband->n_channels; i++) {
2423                         struct ieee80211_channel *channel =
2424                                 &sband->channels[i];
2425
2426                         struct iwl_scan_channel_cfg_umac *cfg =
2427                                 &cp->channel_config[cp->count];
2428
2429                         if (!cfg80211_channel_is_psc(channel))
2430                                 continue;
2431
2432                         cfg->v5.channel_num = channel->hw_value;
2433                         cfg->v5.iter_count = 1;
2434                         cfg->v5.iter_interval = 0;
2435
2436                         if (version < 17) {
2437                                 cfg->flags = 0;
2438                                 cfg->v2.band = PHY_BAND_6;
2439                         } else {
2440                                 cfg->flags = cpu_to_le32(PHY_BAND_6 <<
2441                                                          IWL_CHAN_CFG_FLAGS_BAND_POS);
2442                                 cfg->v5.psd_20 =
2443                                         IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED;
2444                         }
2445                         cp->count++;
2446                 }
2447         }
2448 }
2449
2450 static int iwl_mvm_scan_umac_v12(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2451                                  struct iwl_mvm_scan_params *params, int type,
2452                                  int uid)
2453 {
2454         struct iwl_scan_req_umac_v12 *cmd = mvm->scan_cmd;
2455         struct iwl_scan_req_params_v12 *scan_p = &cmd->scan_params;
2456         int ret;
2457         u16 gen_flags;
2458
2459         mvm->scan_uid_status[uid] = type;
2460
2461         cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2462         cmd->uid = cpu_to_le32(uid);
2463
2464         gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2465         iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
2466                                              &scan_p->general_params,
2467                                              gen_flags, 0, 12);
2468
2469         ret = iwl_mvm_fill_scan_sched_params(params,
2470                                              scan_p->periodic_params.schedule,
2471                                              &scan_p->periodic_params.delay);
2472         if (ret)
2473                 return ret;
2474
2475         iwl_mvm_scan_umac_fill_probe_p_v3(params, &scan_p->probe_params);
2476         iwl_mvm_scan_umac_fill_ch_p_v4(mvm, params, vif,
2477                                        &scan_p->channel_params, 0);
2478
2479         return 0;
2480 }
2481
2482 static int iwl_mvm_scan_umac_v14_and_above(struct iwl_mvm *mvm,
2483                                            struct ieee80211_vif *vif,
2484                                            struct iwl_mvm_scan_params *params,
2485                                            int type, int uid, u32 version)
2486 {
2487         struct iwl_scan_req_umac_v17 *cmd = mvm->scan_cmd;
2488         struct iwl_scan_req_params_v17 *scan_p = &cmd->scan_params;
2489         struct iwl_scan_channel_params_v7 *cp = &scan_p->channel_params;
2490         struct iwl_scan_probe_params_v4 *pb = &scan_p->probe_params;
2491         int ret;
2492         u16 gen_flags;
2493         u8 gen_flags2;
2494         u32 bitmap_ssid = 0;
2495
2496         mvm->scan_uid_status[uid] = type;
2497
2498         cmd->ooc_priority = cpu_to_le32(iwl_mvm_scan_umac_ooc_priority(params));
2499         cmd->uid = cpu_to_le32(uid);
2500
2501         gen_flags = iwl_mvm_scan_umac_flags_v2(mvm, params, vif, type);
2502
2503         if (version >= 15)
2504                 gen_flags2 = iwl_mvm_scan_umac_flags2(mvm, params, vif, type);
2505         else
2506                 gen_flags2 = 0;
2507
2508         iwl_mvm_scan_umac_fill_general_p_v12(mvm, params, vif,
2509                                              &scan_p->general_params,
2510                                              gen_flags, gen_flags2, version);
2511
2512         ret = iwl_mvm_fill_scan_sched_params(params,
2513                                              scan_p->periodic_params.schedule,
2514                                              &scan_p->periodic_params.delay);
2515         if (ret)
2516                 return ret;
2517
2518         if (!params->scan_6ghz) {
2519                 iwl_mvm_scan_umac_fill_probe_p_v4(params,
2520                                                   &scan_p->probe_params,
2521                                                   &bitmap_ssid);
2522                 iwl_mvm_scan_umac_fill_ch_p_v7(mvm, params, vif,
2523                                                &scan_p->channel_params,
2524                                                bitmap_ssid,
2525                                                version);
2526                 return 0;
2527         } else {
2528                 pb->preq = params->preq;
2529         }
2530
2531         cp->flags = iwl_mvm_scan_umac_chan_flags_v2(mvm, params, vif);
2532         cp->n_aps_override[0] = IWL_SCAN_ADWELL_N_APS_GO_FRIENDLY;
2533         cp->n_aps_override[1] = IWL_SCAN_ADWELL_N_APS_SOCIAL_CHS;
2534
2535         iwl_mvm_umac_scan_fill_6g_chan_list(mvm, params, pb);
2536
2537         cp->count = iwl_mvm_umac_scan_cfg_channels_v7_6g(mvm, params,
2538                                                          params->n_channels,
2539                                                          pb, cp, vif->type,
2540                                                          version);
2541         if (!cp->count) {
2542                 mvm->scan_uid_status[uid] = 0;
2543                 return -EINVAL;
2544         }
2545
2546         if (!params->n_ssids ||
2547             (params->n_ssids == 1 && !params->ssids[0].ssid_len))
2548                 cp->flags |= IWL_SCAN_CHANNEL_FLAG_6G_PSC_NO_FILTER;
2549
2550         return 0;
2551 }
2552
2553 static int iwl_mvm_scan_umac_v14(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2554                                  struct iwl_mvm_scan_params *params, int type,
2555                                  int uid)
2556 {
2557         return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 14);
2558 }
2559
2560 static int iwl_mvm_scan_umac_v15(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2561                                  struct iwl_mvm_scan_params *params, int type,
2562                                  int uid)
2563 {
2564         return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 15);
2565 }
2566
2567 static int iwl_mvm_scan_umac_v16(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2568                                  struct iwl_mvm_scan_params *params, int type,
2569                                  int uid)
2570 {
2571         return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 16);
2572 }
2573
2574 static int iwl_mvm_scan_umac_v17(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2575                                  struct iwl_mvm_scan_params *params, int type,
2576                                  int uid)
2577 {
2578         return iwl_mvm_scan_umac_v14_and_above(mvm, vif, params, type, uid, 17);
2579 }
2580
2581 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
2582 {
2583         return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
2584 }
2585
2586 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
2587 {
2588         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
2589                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
2590
2591         /* This looks a bit arbitrary, but the idea is that if we run
2592          * out of possible simultaneous scans and the userspace is
2593          * trying to run a scan type that is already running, we
2594          * return -EBUSY.  But if the userspace wants to start a
2595          * different type of scan, we stop the opposite type to make
2596          * space for the new request.  The reason is backwards
2597          * compatibility with old wpa_supplicant that wouldn't stop a
2598          * scheduled scan before starting a normal scan.
2599          */
2600
2601         /* FW supports only a single periodic scan */
2602         if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
2603             mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT))
2604                 return -EBUSY;
2605
2606         if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
2607                 return 0;
2608
2609         /* Use a switch, even though this is a bitmask, so that more
2610          * than one bits set will fall in default and we will warn.
2611          */
2612         switch (type) {
2613         case IWL_MVM_SCAN_REGULAR:
2614                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2615                         return -EBUSY;
2616                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2617         case IWL_MVM_SCAN_SCHED:
2618                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2619                         return -EBUSY;
2620                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2621         case IWL_MVM_SCAN_NETDETECT:
2622                 /* For non-unified images, there's no need to stop
2623                  * anything for net-detect since the firmware is
2624                  * restarted anyway.  This way, any sched scans that
2625                  * were running will be restarted when we resume.
2626                  */
2627                 if (!unified_image)
2628                         return 0;
2629
2630                 /* If this is a unified image and we ran out of scans,
2631                  * we need to stop something.  Prefer stopping regular
2632                  * scans, because the results are useless at this
2633                  * point, and we should be able to keep running
2634                  * another scheduled scan while suspended.
2635                  */
2636                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
2637                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
2638                                                  true);
2639                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
2640                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
2641                                                  true);
2642                 /* Something is wrong if no scan was running but we
2643                  * ran out of scans.
2644                  */
2645                 fallthrough;
2646         default:
2647                 WARN_ON(1);
2648                 break;
2649         }
2650
2651         return -EIO;
2652 }
2653
2654 #define SCAN_TIMEOUT 30000
2655
2656 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
2657 {
2658         struct delayed_work *delayed_work = to_delayed_work(work);
2659         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
2660                                            scan_timeout_dwork);
2661
2662         IWL_ERR(mvm, "regular scan timed out\n");
2663
2664         iwl_force_nmi(mvm->trans);
2665 }
2666
2667 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm,
2668                                    struct iwl_mvm_scan_params *params,
2669                                    struct ieee80211_vif *vif)
2670 {
2671         if (iwl_mvm_is_cdb_supported(mvm)) {
2672                 params->type =
2673                         iwl_mvm_get_scan_type_band(mvm, vif,
2674                                                    NL80211_BAND_2GHZ);
2675                 params->hb_type =
2676                         iwl_mvm_get_scan_type_band(mvm, vif,
2677                                                    NL80211_BAND_5GHZ);
2678         } else {
2679                 params->type = iwl_mvm_get_scan_type(mvm, vif);
2680         }
2681 }
2682
2683 struct iwl_scan_umac_handler {
2684         u8 version;
2685         int (*handler)(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2686                        struct iwl_mvm_scan_params *params, int type, int uid);
2687 };
2688
2689 #define IWL_SCAN_UMAC_HANDLER(_ver) {           \
2690         .version = _ver,                        \
2691         .handler = iwl_mvm_scan_umac_v##_ver,   \
2692 }
2693
2694 static const struct iwl_scan_umac_handler iwl_scan_umac_handlers[] = {
2695         /* set the newest version first to shorten the list traverse time */
2696         IWL_SCAN_UMAC_HANDLER(17),
2697         IWL_SCAN_UMAC_HANDLER(16),
2698         IWL_SCAN_UMAC_HANDLER(15),
2699         IWL_SCAN_UMAC_HANDLER(14),
2700         IWL_SCAN_UMAC_HANDLER(12),
2701 };
2702
2703 static void iwl_mvm_mei_scan_work(struct work_struct *wk)
2704 {
2705         struct iwl_mei_scan_filter *scan_filter =
2706                 container_of(wk, struct iwl_mei_scan_filter, scan_work);
2707         struct iwl_mvm *mvm =
2708                 container_of(scan_filter, struct iwl_mvm, mei_scan_filter);
2709         struct iwl_mvm_csme_conn_info *info;
2710         struct sk_buff *skb;
2711         u8 bssid[ETH_ALEN];
2712
2713         mutex_lock(&mvm->mutex);
2714         info = iwl_mvm_get_csme_conn_info(mvm);
2715         memcpy(bssid, info->conn_info.bssid, ETH_ALEN);
2716         mutex_unlock(&mvm->mutex);
2717
2718         while ((skb = skb_dequeue(&scan_filter->scan_res))) {
2719                 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2720
2721                 if (!memcmp(mgmt->bssid, bssid, ETH_ALEN))
2722                         ieee80211_rx_irqsafe(mvm->hw, skb);
2723                 else
2724                         kfree_skb(skb);
2725         }
2726 }
2727
2728 void iwl_mvm_mei_scan_filter_init(struct iwl_mei_scan_filter *mei_scan_filter)
2729 {
2730         skb_queue_head_init(&mei_scan_filter->scan_res);
2731         INIT_WORK(&mei_scan_filter->scan_work, iwl_mvm_mei_scan_work);
2732 }
2733
2734 /* In case CSME is connected and has link protection set, this function will
2735  * override the scan request to scan only the associated channel and only for
2736  * the associated SSID.
2737  */
2738 static void iwl_mvm_mei_limited_scan(struct iwl_mvm *mvm,
2739                                      struct iwl_mvm_scan_params *params)
2740 {
2741         struct iwl_mvm_csme_conn_info *info = iwl_mvm_get_csme_conn_info(mvm);
2742         struct iwl_mei_conn_info *conn_info;
2743         struct ieee80211_channel *chan;
2744         int scan_iters, i;
2745
2746         if (!info) {
2747                 IWL_DEBUG_SCAN(mvm, "mei_limited_scan: no connection info\n");
2748                 return;
2749         }
2750
2751         conn_info = &info->conn_info;
2752         if (!info->conn_info.lp_state || !info->conn_info.ssid_len)
2753                 return;
2754
2755         if (!params->n_channels || !params->n_ssids)
2756                 return;
2757
2758         mvm->mei_scan_filter.is_mei_limited_scan = true;
2759
2760         chan = ieee80211_get_channel(mvm->hw->wiphy,
2761                                      ieee80211_channel_to_frequency(conn_info->channel,
2762                                                                     conn_info->band));
2763         if (!chan) {
2764                 IWL_DEBUG_SCAN(mvm,
2765                                "Failed to get CSME channel (chan=%u band=%u)\n",
2766                                conn_info->channel, conn_info->band);
2767                 return;
2768         }
2769
2770         /* The mei filtered scan must find the AP, otherwise CSME will
2771          * take the NIC ownership. Add several iterations on the channel to
2772          * make the scan more robust.
2773          */
2774         scan_iters = min(IWL_MEI_SCAN_NUM_ITER, params->n_channels);
2775         params->n_channels = scan_iters;
2776         for (i = 0; i < scan_iters; i++)
2777                 params->channels[i] = chan;
2778
2779         IWL_DEBUG_SCAN(mvm, "Mei scan: num iterations=%u\n", scan_iters);
2780
2781         params->n_ssids = 1;
2782         params->ssids[0].ssid_len = conn_info->ssid_len;
2783         memcpy(params->ssids[0].ssid, conn_info->ssid, conn_info->ssid_len);
2784 }
2785
2786 static int iwl_mvm_build_scan_cmd(struct iwl_mvm *mvm,
2787                                   struct ieee80211_vif *vif,
2788                                   struct iwl_host_cmd *hcmd,
2789                                   struct iwl_mvm_scan_params *params,
2790                                   int type)
2791 {
2792         int uid, i, err;
2793         u8 scan_ver;
2794
2795         lockdep_assert_held(&mvm->mutex);
2796         memset(mvm->scan_cmd, 0, mvm->scan_cmd_size);
2797
2798         iwl_mvm_mei_limited_scan(mvm, params);
2799
2800         if (!fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2801                 hcmd->id = SCAN_OFFLOAD_REQUEST_CMD;
2802
2803                 return iwl_mvm_scan_lmac(mvm, vif, params);
2804         }
2805
2806         uid = iwl_mvm_scan_uid_by_status(mvm, 0);
2807         if (uid < 0)
2808                 return uid;
2809
2810         hcmd->id = WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_REQ_UMAC);
2811
2812         scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
2813                                          IWL_FW_CMD_VER_UNKNOWN);
2814
2815         for (i = 0; i < ARRAY_SIZE(iwl_scan_umac_handlers); i++) {
2816                 const struct iwl_scan_umac_handler *ver_handler =
2817                         &iwl_scan_umac_handlers[i];
2818
2819                 if (ver_handler->version != scan_ver)
2820                         continue;
2821
2822                 return ver_handler->handler(mvm, vif, params, type, uid);
2823         }
2824
2825         err = iwl_mvm_scan_umac(mvm, vif, params, type, uid);
2826         if (err)
2827                 return err;
2828
2829         return uid;
2830 }
2831
2832 struct iwl_mvm_scan_respect_p2p_go_iter_data {
2833         struct ieee80211_vif *current_vif;
2834         bool p2p_go;
2835         enum nl80211_band band;
2836 };
2837
2838 static void iwl_mvm_scan_respect_p2p_go_iter(void *_data, u8 *mac,
2839                                              struct ieee80211_vif *vif)
2840 {
2841         struct iwl_mvm_scan_respect_p2p_go_iter_data *data = _data;
2842         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2843
2844         /* exclude the given vif */
2845         if (vif == data->current_vif)
2846                 return;
2847
2848         if (vif->type == NL80211_IFTYPE_AP && vif->p2p) {
2849                 u32 link_id;
2850
2851                 for (link_id = 0;
2852                      link_id < ARRAY_SIZE(mvmvif->link);
2853                      link_id++) {
2854                         struct iwl_mvm_vif_link_info *link =
2855                                 mvmvif->link[link_id];
2856
2857                         if (link && link->phy_ctxt->id < NUM_PHY_CTX &&
2858                             (data->band == NUM_NL80211_BANDS ||
2859                              link->phy_ctxt->channel->band == data->band)) {
2860                                 data->p2p_go = true;
2861                                 break;
2862                         }
2863                 }
2864         }
2865 }
2866
2867 static bool _iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2868                                         struct ieee80211_vif *vif,
2869                                         bool low_latency,
2870                                         enum nl80211_band band)
2871 {
2872         struct iwl_mvm_scan_respect_p2p_go_iter_data data = {
2873                 .current_vif = vif,
2874                 .p2p_go = false,
2875                 .band = band,
2876         };
2877
2878         if (!low_latency)
2879                 return false;
2880
2881         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
2882                                                    IEEE80211_IFACE_ITER_NORMAL,
2883                                                    iwl_mvm_scan_respect_p2p_go_iter,
2884                                                    &data);
2885
2886         return data.p2p_go;
2887 }
2888
2889 static bool iwl_mvm_get_respect_p2p_go_band(struct iwl_mvm *mvm,
2890                                             struct ieee80211_vif *vif,
2891                                             enum nl80211_band band)
2892 {
2893         bool low_latency = iwl_mvm_low_latency_band(mvm, band);
2894
2895         return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency, band);
2896 }
2897
2898 static bool iwl_mvm_get_respect_p2p_go(struct iwl_mvm *mvm,
2899                                        struct ieee80211_vif *vif)
2900 {
2901         bool low_latency = iwl_mvm_low_latency(mvm);
2902
2903         return _iwl_mvm_get_respect_p2p_go(mvm, vif, low_latency,
2904                                            NUM_NL80211_BANDS);
2905 }
2906
2907 static void iwl_mvm_fill_respect_p2p_go(struct iwl_mvm *mvm,
2908                                         struct iwl_mvm_scan_params *params,
2909                                         struct ieee80211_vif *vif)
2910 {
2911         if (iwl_mvm_is_cdb_supported(mvm)) {
2912                 params->respect_p2p_go =
2913                         iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2914                                                         NL80211_BAND_2GHZ);
2915                 params->respect_p2p_go_hb =
2916                         iwl_mvm_get_respect_p2p_go_band(mvm, vif,
2917                                                         NL80211_BAND_5GHZ);
2918         } else {
2919                 params->respect_p2p_go = iwl_mvm_get_respect_p2p_go(mvm, vif);
2920         }
2921 }
2922
2923 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2924                            struct cfg80211_scan_request *req,
2925                            struct ieee80211_scan_ies *ies)
2926 {
2927         struct iwl_host_cmd hcmd = {
2928                 .len = { iwl_mvm_scan_size(mvm), },
2929                 .data = { mvm->scan_cmd, },
2930                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
2931         };
2932         struct iwl_mvm_scan_params params = {};
2933         int ret, uid;
2934         struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
2935
2936         lockdep_assert_held(&mvm->mutex);
2937
2938         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2939                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
2940                 return -EBUSY;
2941         }
2942
2943         ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
2944         if (ret)
2945                 return ret;
2946
2947         /* we should have failed registration if scan_cmd was NULL */
2948         if (WARN_ON(!mvm->scan_cmd))
2949                 return -ENOMEM;
2950
2951         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
2952                 return -ENOBUFS;
2953
2954         params.n_ssids = req->n_ssids;
2955         params.flags = req->flags;
2956         params.n_channels = req->n_channels;
2957         params.delay = 0;
2958         params.ssids = req->ssids;
2959         params.channels = req->channels;
2960         params.mac_addr = req->mac_addr;
2961         params.mac_addr_mask = req->mac_addr_mask;
2962         params.no_cck = req->no_cck;
2963         params.pass_all = true;
2964         params.n_match_sets = 0;
2965         params.match_sets = NULL;
2966         ether_addr_copy(params.bssid, req->bssid);
2967
2968         params.scan_plans = &scan_plan;
2969         params.n_scan_plans = 1;
2970
2971         params.n_6ghz_params = req->n_6ghz_params;
2972         params.scan_6ghz_params = req->scan_6ghz_params;
2973         params.scan_6ghz = req->scan_6ghz;
2974         iwl_mvm_fill_scan_type(mvm, &params, vif);
2975         iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
2976
2977         if (req->duration)
2978                 params.iter_notif = true;
2979
2980         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
2981
2982         iwl_mvm_scan_6ghz_passive_scan(mvm, &params, vif);
2983
2984         uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params,
2985                                      IWL_MVM_SCAN_REGULAR);
2986
2987         if (uid < 0)
2988                 return uid;
2989
2990         iwl_mvm_pause_tcm(mvm, false);
2991
2992         ret = iwl_mvm_send_cmd(mvm, &hcmd);
2993         if (ret) {
2994                 /* If the scan failed, it usually means that the FW was unable
2995                  * to allocate the time events. Warn on it, but maybe we
2996                  * should try to send the command again with different params.
2997                  */
2998                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
2999                 iwl_mvm_resume_tcm(mvm);
3000                 mvm->scan_uid_status[uid] = 0;
3001                 return ret;
3002         }
3003
3004         IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
3005         mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
3006         mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
3007
3008         if (params.enable_6ghz_passive)
3009                 mvm->last_6ghz_passive_scan_jiffies = jiffies;
3010
3011         schedule_delayed_work(&mvm->scan_timeout_dwork,
3012                               msecs_to_jiffies(SCAN_TIMEOUT));
3013
3014         return 0;
3015 }
3016
3017 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
3018                              struct ieee80211_vif *vif,
3019                              struct cfg80211_sched_scan_request *req,
3020                              struct ieee80211_scan_ies *ies,
3021                              int type)
3022 {
3023         struct iwl_host_cmd hcmd = {
3024                 .len = { iwl_mvm_scan_size(mvm), },
3025                 .data = { mvm->scan_cmd, },
3026                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
3027         };
3028         struct iwl_mvm_scan_params params = {};
3029         int ret, uid;
3030         int i, j;
3031         bool non_psc_included = false;
3032
3033         lockdep_assert_held(&mvm->mutex);
3034
3035         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
3036                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
3037                 return -EBUSY;
3038         }
3039
3040         ret = iwl_mvm_check_running_scans(mvm, type);
3041         if (ret)
3042                 return ret;
3043
3044         /* we should have failed registration if scan_cmd was NULL */
3045         if (WARN_ON(!mvm->scan_cmd))
3046                 return -ENOMEM;
3047
3048
3049         params.n_ssids = req->n_ssids;
3050         params.flags = req->flags;
3051         params.n_channels = req->n_channels;
3052         params.ssids = req->ssids;
3053         params.channels = req->channels;
3054         params.mac_addr = req->mac_addr;
3055         params.mac_addr_mask = req->mac_addr_mask;
3056         params.no_cck = false;
3057         params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
3058         params.n_match_sets = req->n_match_sets;
3059         params.match_sets = req->match_sets;
3060         eth_broadcast_addr(params.bssid);
3061         if (!req->n_scan_plans)
3062                 return -EINVAL;
3063
3064         params.n_scan_plans = req->n_scan_plans;
3065         params.scan_plans = req->scan_plans;
3066
3067         iwl_mvm_fill_scan_type(mvm, &params, vif);
3068         iwl_mvm_fill_respect_p2p_go(mvm, &params, vif);
3069
3070         /* In theory, LMAC scans can handle a 32-bit delay, but since
3071          * waiting for over 18 hours to start the scan is a bit silly
3072          * and to keep it aligned with UMAC scans (which only support
3073          * 16-bit delays), trim it down to 16-bits.
3074          */
3075         if (req->delay > U16_MAX) {
3076                 IWL_DEBUG_SCAN(mvm,
3077                                "delay value is > 16-bits, set to max possible\n");
3078                 params.delay = U16_MAX;
3079         } else {
3080                 params.delay = req->delay;
3081         }
3082
3083         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
3084         if (ret)
3085                 return ret;
3086
3087         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
3088
3089         /* for 6 GHZ band only PSC channels need to be added */
3090         for (i = 0; i < params.n_channels; i++) {
3091                 struct ieee80211_channel *channel = params.channels[i];
3092
3093                 if (channel->band == NL80211_BAND_6GHZ &&
3094                     !cfg80211_channel_is_psc(channel)) {
3095                         non_psc_included = true;
3096                         break;
3097                 }
3098         }
3099
3100         if (non_psc_included) {
3101                 params.channels = kmemdup(params.channels,
3102                                           sizeof(params.channels[0]) *
3103                                           params.n_channels,
3104                                           GFP_KERNEL);
3105                 if (!params.channels)
3106                         return -ENOMEM;
3107
3108                 for (i = j = 0; i < params.n_channels; i++) {
3109                         if (params.channels[i]->band == NL80211_BAND_6GHZ &&
3110                             !cfg80211_channel_is_psc(params.channels[i]))
3111                                 continue;
3112                         params.channels[j++] = params.channels[i];
3113                 }
3114                 params.n_channels = j;
3115         }
3116
3117         if (non_psc_included &&
3118             !iwl_mvm_scan_fits(mvm, req->n_ssids, ies, params.n_channels)) {
3119                 kfree(params.channels);
3120                 return -ENOBUFS;
3121         }
3122
3123         uid = iwl_mvm_build_scan_cmd(mvm, vif, &hcmd, &params, type);
3124
3125         if (non_psc_included)
3126                 kfree(params.channels);
3127         if (uid < 0)
3128                 return uid;
3129
3130         ret = iwl_mvm_send_cmd(mvm, &hcmd);
3131         if (!ret) {
3132                 IWL_DEBUG_SCAN(mvm,
3133                                "Sched scan request was sent successfully\n");
3134                 mvm->scan_status |= type;
3135         } else {
3136                 /* If the scan failed, it usually means that the FW was unable
3137                  * to allocate the time events. Warn on it, but maybe we
3138                  * should try to send the command again with different params.
3139                  */
3140                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
3141                 mvm->scan_uid_status[uid] = 0;
3142                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3143         }
3144
3145         return ret;
3146 }
3147
3148 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
3149                                          struct iwl_rx_cmd_buffer *rxb)
3150 {
3151         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3152         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
3153         u32 uid = __le32_to_cpu(notif->uid);
3154         bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
3155
3156         mvm->mei_scan_filter.is_mei_limited_scan = false;
3157
3158         if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
3159                 return;
3160
3161         /* if the scan is already stopping, we don't need to notify mac80211 */
3162         if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
3163                 struct cfg80211_scan_info info = {
3164                         .aborted = aborted,
3165                         .scan_start_tsf = mvm->scan_start,
3166                 };
3167
3168                 memcpy(info.tsf_bssid, mvm->scan_vif->deflink.bssid, ETH_ALEN);
3169                 ieee80211_scan_completed(mvm->hw, &info);
3170                 mvm->scan_vif = NULL;
3171                 cancel_delayed_work(&mvm->scan_timeout_dwork);
3172                 iwl_mvm_resume_tcm(mvm);
3173         } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
3174                 ieee80211_sched_scan_stopped(mvm->hw);
3175                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3176         }
3177
3178         mvm->scan_status &= ~mvm->scan_uid_status[uid];
3179         IWL_DEBUG_SCAN(mvm,
3180                        "Scan completed, uid %u type %u, status %s, EBS status %s\n",
3181                        uid, mvm->scan_uid_status[uid],
3182                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
3183                                 "completed" : "aborted",
3184                        iwl_mvm_ebs_status_str(notif->ebs_status));
3185         IWL_DEBUG_SCAN(mvm,
3186                        "Last line %d, Last iteration %d, Time from last iteration %d\n",
3187                        notif->last_schedule, notif->last_iter,
3188                        __le32_to_cpu(notif->time_from_last_iter));
3189
3190         if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
3191             notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
3192                 mvm->last_ebs_successful = false;
3193
3194         mvm->scan_uid_status[uid] = 0;
3195 }
3196
3197 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
3198                                               struct iwl_rx_cmd_buffer *rxb)
3199 {
3200         struct iwl_rx_packet *pkt = rxb_addr(rxb);
3201         struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
3202
3203         mvm->scan_start = le64_to_cpu(notif->start_tsf);
3204
3205         IWL_DEBUG_SCAN(mvm,
3206                        "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
3207                        notif->status, notif->scanned_channels);
3208
3209         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
3210                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
3211                 ieee80211_sched_scan_results(mvm->hw);
3212                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
3213         }
3214
3215         IWL_DEBUG_SCAN(mvm,
3216                        "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
3217                        mvm->scan_start);
3218 }
3219
3220 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
3221 {
3222         struct iwl_umac_scan_abort cmd = {};
3223         int uid, ret;
3224
3225         lockdep_assert_held(&mvm->mutex);
3226
3227         /* We should always get a valid index here, because we already
3228          * checked that this type of scan was running in the generic
3229          * code.
3230          */
3231         uid = iwl_mvm_scan_uid_by_status(mvm, type);
3232         if (WARN_ON_ONCE(uid < 0))
3233                 return uid;
3234
3235         cmd.uid = cpu_to_le32(uid);
3236
3237         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
3238
3239         ret = iwl_mvm_send_cmd_pdu(mvm,
3240                                    WIDE_ID(IWL_ALWAYS_LONG_GROUP, SCAN_ABORT_UMAC),
3241                                    0, sizeof(cmd), &cmd);
3242         if (!ret)
3243                 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
3244
3245         return ret;
3246 }
3247
3248 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
3249 {
3250         struct iwl_notification_wait wait_scan_done;
3251         static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
3252                                               SCAN_OFFLOAD_COMPLETE, };
3253         int ret;
3254
3255         lockdep_assert_held(&mvm->mutex);
3256
3257         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
3258                                    scan_done_notif,
3259                                    ARRAY_SIZE(scan_done_notif),
3260                                    NULL, NULL);
3261
3262         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
3263
3264         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
3265                 ret = iwl_mvm_umac_scan_abort(mvm, type);
3266         else
3267                 ret = iwl_mvm_lmac_scan_abort(mvm);
3268
3269         if (ret) {
3270                 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
3271                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
3272                 return ret;
3273         }
3274
3275         return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done,
3276                                      1 * HZ);
3277 }
3278
3279 static size_t iwl_scan_req_umac_get_size(u8 scan_ver)
3280 {
3281         switch (scan_ver) {
3282         case 12:
3283                 return sizeof(struct iwl_scan_req_umac_v12);
3284         case 14:
3285         case 15:
3286         case 16:
3287         case 17:
3288                 return sizeof(struct iwl_scan_req_umac_v17);
3289         }
3290
3291         return 0;
3292 }
3293
3294 size_t iwl_mvm_scan_size(struct iwl_mvm *mvm)
3295 {
3296         int base_size, tail_size;
3297         u8 scan_ver = iwl_fw_lookup_cmd_ver(mvm->fw, SCAN_REQ_UMAC,
3298                                             IWL_FW_CMD_VER_UNKNOWN);
3299
3300         base_size = iwl_scan_req_umac_get_size(scan_ver);
3301         if (base_size)
3302                 return base_size;
3303
3304
3305         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
3306                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
3307         else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
3308                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
3309         else if (iwl_mvm_cdb_scan_api(mvm))
3310                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
3311         else
3312                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
3313
3314         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3315                 if (iwl_mvm_is_scan_ext_chan_supported(mvm))
3316                         tail_size = sizeof(struct iwl_scan_req_umac_tail_v2);
3317                 else
3318                         tail_size = sizeof(struct iwl_scan_req_umac_tail_v1);
3319
3320                 return base_size +
3321                         sizeof(struct iwl_scan_channel_cfg_umac) *
3322                                 mvm->fw->ucode_capa.n_scan_channels +
3323                         tail_size;
3324         }
3325         return sizeof(struct iwl_scan_req_lmac) +
3326                 sizeof(struct iwl_scan_channel_cfg_lmac) *
3327                 mvm->fw->ucode_capa.n_scan_channels +
3328                 sizeof(struct iwl_scan_probe_req_v1);
3329 }
3330
3331 /*
3332  * This function is used in nic restart flow, to inform mac80211 about scans
3333  * that was aborted by restart flow or by an assert.
3334  */
3335 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
3336 {
3337         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
3338                 int uid, i;
3339
3340                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
3341                 if (uid >= 0) {
3342                         struct cfg80211_scan_info info = {
3343                                 .aborted = true,
3344                         };
3345
3346                         cancel_delayed_work(&mvm->scan_timeout_dwork);
3347
3348                         ieee80211_scan_completed(mvm->hw, &info);
3349                         mvm->scan_uid_status[uid] = 0;
3350                 }
3351                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
3352                 if (uid >= 0) {
3353                         /* Sched scan will be restarted by mac80211 in
3354                          * restart_hw, so do not report if FW is about to be
3355                          * restarted.
3356                          */
3357                         if (!mvm->fw_restart)
3358                                 ieee80211_sched_scan_stopped(mvm->hw);
3359                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3360                         mvm->scan_uid_status[uid] = 0;
3361                 }
3362                 uid = iwl_mvm_scan_uid_by_status(mvm,
3363                                                  IWL_MVM_SCAN_STOPPING_REGULAR);
3364                 if (uid >= 0)
3365                         mvm->scan_uid_status[uid] = 0;
3366
3367                 uid = iwl_mvm_scan_uid_by_status(mvm,
3368                                                  IWL_MVM_SCAN_STOPPING_SCHED);
3369                 if (uid >= 0)
3370                         mvm->scan_uid_status[uid] = 0;
3371
3372                 /* We shouldn't have any UIDs still set.  Loop over all the
3373                  * UIDs to make sure there's nothing left there and warn if
3374                  * any is found.
3375                  */
3376                 for (i = 0; i < mvm->max_scans; i++) {
3377                         if (WARN_ONCE(mvm->scan_uid_status[i],
3378                                       "UMAC scan UID %d status was not cleaned\n",
3379                                       i))
3380                                 mvm->scan_uid_status[i] = 0;
3381                 }
3382         } else {
3383                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
3384                         struct cfg80211_scan_info info = {
3385                                 .aborted = true,
3386                         };
3387
3388                         cancel_delayed_work(&mvm->scan_timeout_dwork);
3389                         ieee80211_scan_completed(mvm->hw, &info);
3390                 }
3391
3392                 /* Sched scan will be restarted by mac80211 in
3393                  * restart_hw, so do not report if FW is about to be
3394                  * restarted.
3395                  */
3396                 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
3397                     !mvm->fw_restart) {
3398                         ieee80211_sched_scan_stopped(mvm->hw);
3399                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3400                 }
3401         }
3402 }
3403
3404 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
3405 {
3406         int ret;
3407
3408         if (!(mvm->scan_status & type))
3409                 return 0;
3410
3411         if (iwl_mvm_is_radio_killed(mvm)) {
3412                 ret = 0;
3413                 goto out;
3414         }
3415
3416         ret = iwl_mvm_scan_stop_wait(mvm, type);
3417         if (!ret)
3418                 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
3419 out:
3420         /* Clear the scan status so the next scan requests will
3421          * succeed and mark the scan as stopping, so that the Rx
3422          * handler doesn't do anything, as the scan was stopped from
3423          * above.
3424          */
3425         mvm->scan_status &= ~type;
3426
3427         if (type == IWL_MVM_SCAN_REGULAR) {
3428                 cancel_delayed_work(&mvm->scan_timeout_dwork);
3429                 if (notify) {
3430                         struct cfg80211_scan_info info = {
3431                                 .aborted = true,
3432                         };
3433
3434                         ieee80211_scan_completed(mvm->hw, &info);
3435                 }
3436         } else if (notify) {
3437                 ieee80211_sched_scan_stopped(mvm->hw);
3438                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
3439         }
3440
3441         return ret;
3442 }