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

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DEFINITIONS

This source file includes following definitions.
  1. iwl_mvm_get_scan_req_umac_data
  2. iwl_mvm_get_scan_req_umac_channel
  3. iwl_mvm_scan_rx_ant
  4. iwl_mvm_scan_rx_chain
  5. iwl_mvm_scan_rxon_flags
  6. iwl_mvm_scan_rate_n_flags
  7. iwl_mvm_scan_condition_iterator
  8. iwl_mvm_get_traffic_load
  9. iwl_mvm_get_traffic_load_band
  10. iwl_mvm_is_dcm_with_go_iterator
  11. _iwl_mvm_get_scan_type
  12. iwl_mvm_get_scan_type
  13. iwl_mvm_get_scan_type_band
  14. iwl_mvm_get_measurement_dwell
  15. iwl_mvm_rrm_scan_needed
  16. iwl_mvm_max_scan_ie_fw_cmd_room
  17. iwl_mvm_max_scan_ie_len
  18. iwl_mvm_rx_lmac_scan_iter_complete_notif
  19. iwl_mvm_rx_scan_match_found
  20. iwl_mvm_ebs_status_str
  21. iwl_mvm_rx_lmac_scan_complete_notif
  22. iwl_ssid_exist
  23. iwl_scan_build_ssids
  24. iwl_mvm_config_sched_scan_profiles
  25. iwl_mvm_scan_pass_all
  26. iwl_mvm_lmac_scan_abort
  27. iwl_mvm_scan_fill_tx_cmd
  28. iwl_mvm_lmac_scan_cfg_channels
  29. iwl_mvm_copy_and_insert_ds_elem
  30. iwl_mvm_add_tpc_report_ie
  31. iwl_mvm_build_scan_probe
  32. iwl_mvm_scan_lmac_dwell
  33. iwl_mvm_scan_fits
  34. iwl_mvm_scan_use_ebs
  35. iwl_mvm_is_regular_scan
  36. iwl_mvm_is_scan_fragmented
  37. iwl_mvm_scan_lmac_flags
  38. iwl_mvm_scan_set_legacy_probe_req
  39. iwl_mvm_scan_lmac
  40. rate_to_scan_rate_flag
  41. iwl_mvm_scan_config_rates
  42. iwl_mvm_fill_scan_dwell
  43. iwl_mvm_fill_channels
  44. iwl_mvm_fill_scan_config_v1
  45. iwl_mvm_fill_scan_config_v2
  46. iwl_mvm_legacy_config_scan
  47. iwl_mvm_config_scan
  48. iwl_mvm_scan_uid_by_status
  49. iwl_mvm_scan_umac_dwell
  50. iwl_mvm_umac_scan_cfg_channels
  51. iwl_mvm_scan_umac_flags
  52. iwl_mvm_scan_umac
  53. iwl_mvm_num_scans
  54. iwl_mvm_check_running_scans
  55. iwl_mvm_scan_timeout_wk
  56. iwl_mvm_fill_scan_type
  57. iwl_mvm_reg_scan_start
  58. iwl_mvm_sched_scan_start
  59. iwl_mvm_rx_umac_scan_complete_notif
  60. iwl_mvm_rx_umac_scan_iter_complete_notif
  61. iwl_mvm_umac_scan_abort
  62. iwl_mvm_scan_stop_wait
  63. iwl_mvm_scan_size
  64. iwl_mvm_report_scan_aborted
  65. iwl_mvm_scan_stop

   1 /******************************************************************************
   2  *
   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
   5  *
   6  * GPL LICENSE SUMMARY
   7  *
   8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
   9  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  10  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  11  * Copyright(c) 2018 - 2019 Intel Corporation
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of version 2 of the GNU General Public License as
  15  * published by the Free Software Foundation.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20  * General Public License for more details.
  21  *
  22  * The full GNU General Public License is included in this distribution
  23  * in the file called COPYING.
  24  *
  25  * Contact Information:
  26  *  Intel Linux Wireless <linuxwifi@intel.com>
  27  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  28  *
  29  * BSD LICENSE
  30  *
  31  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  32  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  33  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  34  * Copyright(c) 2018 - 2019 Intel Corporation
  35  * All rights reserved.
  36  *
  37  * Redistribution and use in source and binary forms, with or without
  38  * modification, are permitted provided that the following conditions
  39  * are met:
  40  *
  41  *  * Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  *  * Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in
  45  *    the documentation and/or other materials provided with the
  46  *    distribution.
  47  *  * Neither the name Intel Corporation nor the names of its
  48  *    contributors may be used to endorse or promote products derived
  49  *    from this software without specific prior written permission.
  50  *
  51  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  52  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  53  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  54  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  55  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  56  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  57  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  58  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  59  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  60  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  61  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  62  *
  63  *****************************************************************************/
  64 
  65 #include <linux/etherdevice.h>
  66 #include <net/mac80211.h>
  67 
  68 #include "mvm.h"
  69 #include "fw/api/scan.h"
  70 #include "iwl-io.h"
  71 
  72 #define IWL_DENSE_EBS_SCAN_RATIO 5
  73 #define IWL_SPARSE_EBS_SCAN_RATIO 1
  74 
  75 #define IWL_SCAN_DWELL_ACTIVE           10
  76 #define IWL_SCAN_DWELL_PASSIVE          110
  77 #define IWL_SCAN_DWELL_FRAGMENTED       44
  78 #define IWL_SCAN_DWELL_EXTENDED         90
  79 #define IWL_SCAN_NUM_OF_FRAGS           3
  80 #define IWL_SCAN_LAST_2_4_CHN           14
  81 
  82 #define IWL_SCAN_BAND_5_2               0
  83 #define IWL_SCAN_BAND_2_4               1
  84 
  85 /* adaptive dwell max budget time [TU] for full scan */
  86 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300
  87 /* adaptive dwell max budget time [TU] for directed scan */
  88 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100
  89 /* adaptive dwell default high band APs number */
  90 #define IWL_SCAN_ADWELL_DEFAULT_HB_N_APS 8
  91 /* adaptive dwell default low band APs number */
  92 #define IWL_SCAN_ADWELL_DEFAULT_LB_N_APS 2
  93 /* adaptive dwell default APs number in social channels (1, 6, 11) */
  94 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
  95 
  96 struct iwl_mvm_scan_timing_params {
  97         u32 suspend_time;
  98         u32 max_out_time;
  99 };
 100 
 101 static struct iwl_mvm_scan_timing_params scan_timing[] = {
 102         [IWL_SCAN_TYPE_UNASSOC] = {
 103                 .suspend_time = 0,
 104                 .max_out_time = 0,
 105         },
 106         [IWL_SCAN_TYPE_WILD] = {
 107                 .suspend_time = 30,
 108                 .max_out_time = 120,
 109         },
 110         [IWL_SCAN_TYPE_MILD] = {
 111                 .suspend_time = 120,
 112                 .max_out_time = 120,
 113         },
 114         [IWL_SCAN_TYPE_FRAGMENTED] = {
 115                 .suspend_time = 95,
 116                 .max_out_time = 44,
 117         },
 118         [IWL_SCAN_TYPE_FAST_BALANCE] = {
 119                 .suspend_time = 30,
 120                 .max_out_time = 37,
 121         },
 122 };
 123 
 124 struct iwl_mvm_scan_params {
 125         /* For CDB this is low band scan type, for non-CDB - type. */
 126         enum iwl_mvm_scan_type type;
 127         enum iwl_mvm_scan_type hb_type;
 128         u32 n_channels;
 129         u16 delay;
 130         int n_ssids;
 131         struct cfg80211_ssid *ssids;
 132         struct ieee80211_channel **channels;
 133         u32 flags;
 134         u8 *mac_addr;
 135         u8 *mac_addr_mask;
 136         bool no_cck;
 137         bool pass_all;
 138         int n_match_sets;
 139         struct iwl_scan_probe_req preq;
 140         struct cfg80211_match_set *match_sets;
 141         int n_scan_plans;
 142         struct cfg80211_sched_scan_plan *scan_plans;
 143         u32 measurement_dwell;
 144 };
 145 
 146 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
 147 {
 148         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
 149 
 150         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
 151                 return (void *)&cmd->v8.data;
 152 
 153         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
 154                 return (void *)&cmd->v7.data;
 155 
 156         if (iwl_mvm_cdb_scan_api(mvm))
 157                 return (void *)&cmd->v6.data;
 158 
 159         return (void *)&cmd->v1.data;
 160 }
 161 
 162 static inline struct iwl_scan_umac_chan_param *
 163 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm)
 164 {
 165         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
 166 
 167         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
 168                 return &cmd->v8.channel;
 169 
 170         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
 171                 return &cmd->v7.channel;
 172 
 173         if (iwl_mvm_cdb_scan_api(mvm))
 174                 return &cmd->v6.channel;
 175 
 176         return &cmd->v1.channel;
 177 }
 178 
 179 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
 180 {
 181         if (mvm->scan_rx_ant != ANT_NONE)
 182                 return mvm->scan_rx_ant;
 183         return iwl_mvm_get_valid_rx_ant(mvm);
 184 }
 185 
 186 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 187 {
 188         u16 rx_chain;
 189         u8 rx_ant;
 190 
 191         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 192         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 193         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 194         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 195         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 196         return cpu_to_le16(rx_chain);
 197 }
 198 
 199 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band)
 200 {
 201         if (band == NL80211_BAND_2GHZ)
 202                 return cpu_to_le32(PHY_BAND_24);
 203         else
 204                 return cpu_to_le32(PHY_BAND_5);
 205 }
 206 
 207 static inline __le32
 208 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
 209                           bool no_cck)
 210 {
 211         u32 tx_ant;
 212 
 213         iwl_mvm_toggle_tx_ant(mvm, &mvm->scan_last_antenna_idx);
 214         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 215 
 216         if (band == NL80211_BAND_2GHZ && !no_cck)
 217                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 218                                    tx_ant);
 219         else
 220                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 221 }
 222 
 223 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 224                                             struct ieee80211_vif *vif)
 225 {
 226         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 227         int *global_cnt = data;
 228 
 229         if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 230             mvmvif->phy_ctxt->id < NUM_PHY_CTX)
 231                 *global_cnt += 1;
 232 }
 233 
 234 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
 235 {
 236         return mvm->tcm.result.global_load;
 237 }
 238 
 239 static enum iwl_mvm_traffic_load
 240 iwl_mvm_get_traffic_load_band(struct iwl_mvm *mvm, enum nl80211_band band)
 241 {
 242         return mvm->tcm.result.band_load[band];
 243 }
 244 
 245 struct iwl_is_dcm_with_go_iterator_data {
 246         struct ieee80211_vif *current_vif;
 247         bool is_dcm_with_p2p_go;
 248 };
 249 
 250 static void iwl_mvm_is_dcm_with_go_iterator(void *_data, u8 *mac,
 251                                             struct ieee80211_vif *vif)
 252 {
 253         struct iwl_is_dcm_with_go_iterator_data *data = _data;
 254         struct iwl_mvm_vif *other_mvmvif = iwl_mvm_vif_from_mac80211(vif);
 255         struct iwl_mvm_vif *curr_mvmvif =
 256                 iwl_mvm_vif_from_mac80211(data->current_vif);
 257 
 258         /* exclude the given vif */
 259         if (vif == data->current_vif)
 260                 return;
 261 
 262         if (vif->type == NL80211_IFTYPE_AP && vif->p2p &&
 263             other_mvmvif->phy_ctxt && curr_mvmvif->phy_ctxt &&
 264             other_mvmvif->phy_ctxt->id != curr_mvmvif->phy_ctxt->id)
 265                 data->is_dcm_with_p2p_go = true;
 266 }
 267 
 268 static enum
 269 iwl_mvm_scan_type _iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
 270                                          struct ieee80211_vif *vif,
 271                                          enum iwl_mvm_traffic_load load,
 272                                          bool low_latency)
 273 {
 274         int global_cnt = 0;
 275 
 276         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 277                                             IEEE80211_IFACE_ITER_NORMAL,
 278                                             iwl_mvm_scan_condition_iterator,
 279                                             &global_cnt);
 280         if (!global_cnt)
 281                 return IWL_SCAN_TYPE_UNASSOC;
 282 
 283         if (fw_has_api(&mvm->fw->ucode_capa,
 284                        IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
 285                 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) &&
 286                     (!vif || vif->type != NL80211_IFTYPE_P2P_DEVICE))
 287                         return IWL_SCAN_TYPE_FRAGMENTED;
 288 
 289                 /* in case of DCM with GO where BSS DTIM interval < 220msec
 290                  * set all scan requests as fast-balance scan
 291                  * */
 292                 if (vif && vif->type == NL80211_IFTYPE_STATION &&
 293                     vif->bss_conf.dtim_period < 220) {
 294                         struct iwl_is_dcm_with_go_iterator_data data = {
 295                                 .current_vif = vif,
 296                                 .is_dcm_with_p2p_go = false,
 297                         };
 298 
 299                         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 300                                                 IEEE80211_IFACE_ITER_NORMAL,
 301                                                 iwl_mvm_is_dcm_with_go_iterator,
 302                                                 &data);
 303                         if (data.is_dcm_with_p2p_go)
 304                                 return IWL_SCAN_TYPE_FAST_BALANCE;
 305                 }
 306         }
 307 
 308         if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
 309                 return IWL_SCAN_TYPE_MILD;
 310 
 311         return IWL_SCAN_TYPE_WILD;
 312 }
 313 
 314 static enum
 315 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm,
 316                                         struct ieee80211_vif *vif)
 317 {
 318         enum iwl_mvm_traffic_load load;
 319         bool low_latency;
 320 
 321         load = iwl_mvm_get_traffic_load(mvm);
 322         low_latency = iwl_mvm_low_latency(mvm);
 323 
 324         return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
 325 }
 326 
 327 static enum
 328 iwl_mvm_scan_type iwl_mvm_get_scan_type_band(struct iwl_mvm *mvm,
 329                                              struct ieee80211_vif *vif,
 330                                              enum nl80211_band band)
 331 {
 332         enum iwl_mvm_traffic_load load;
 333         bool low_latency;
 334 
 335         load = iwl_mvm_get_traffic_load_band(mvm, band);
 336         low_latency = iwl_mvm_low_latency_band(mvm, band);
 337 
 338         return _iwl_mvm_get_scan_type(mvm, vif, load, low_latency);
 339 }
 340 
 341 static int
 342 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm,
 343                               struct cfg80211_scan_request *req,
 344                               struct iwl_mvm_scan_params *params)
 345 {
 346         u32 duration = scan_timing[params->type].max_out_time;
 347 
 348         if (!req->duration)
 349                 return 0;
 350 
 351         if (iwl_mvm_is_cdb_supported(mvm)) {
 352                 u32 hb_time = scan_timing[params->hb_type].max_out_time;
 353 
 354                 duration = min_t(u32, duration, hb_time);
 355         }
 356 
 357         if (req->duration_mandatory && req->duration > duration) {
 358                 IWL_DEBUG_SCAN(mvm,
 359                                "Measurement scan - too long dwell %hu (max out time %u)\n",
 360                                req->duration,
 361                                duration);
 362                 return -EOPNOTSUPP;
 363         }
 364 
 365         return min_t(u32, (u32)req->duration, duration);
 366 }
 367 
 368 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 369 {
 370         /* require rrm scan whenever the fw supports it */
 371         return fw_has_capa(&mvm->fw->ucode_capa,
 372                            IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
 373 }
 374 
 375 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
 376 {
 377         int max_probe_len;
 378 
 379         max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 380 
 381         /* we create the 802.11 header and SSID element */
 382         max_probe_len -= 24 + 2;
 383 
 384         /* DS parameter set element is added on 2.4GHZ band if required */
 385         if (iwl_mvm_rrm_scan_needed(mvm))
 386                 max_probe_len -= 3;
 387 
 388         return max_probe_len;
 389 }
 390 
 391 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 392 {
 393         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
 394 
 395         /* TODO: [BUG] This function should return the maximum allowed size of
 396          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 397          * in the same command. So the correct implementation of this function
 398          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 399          * command has only 512 bytes and it would leave us with about 240
 400          * bytes for scan IEs, which is clearly not enough. So meanwhile
 401          * we will report an incorrect value. This may result in a failure to
 402          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 403          * functions with -ENOBUFS, if a large enough probe will be provided.
 404          */
 405         return max_ie_len;
 406 }
 407 
 408 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 409                                               struct iwl_rx_cmd_buffer *rxb)
 410 {
 411         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 412         struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
 413 
 414         IWL_DEBUG_SCAN(mvm,
 415                        "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
 416                        notif->status, notif->scanned_channels);
 417 
 418         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
 419                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
 420                 ieee80211_sched_scan_results(mvm->hw);
 421                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 422         }
 423 }
 424 
 425 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
 426                                  struct iwl_rx_cmd_buffer *rxb)
 427 {
 428         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 429         ieee80211_sched_scan_results(mvm->hw);
 430 }
 431 
 432 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
 433 {
 434         switch (status) {
 435         case IWL_SCAN_EBS_SUCCESS:
 436                 return "successful";
 437         case IWL_SCAN_EBS_INACTIVE:
 438                 return "inactive";
 439         case IWL_SCAN_EBS_FAILED:
 440         case IWL_SCAN_EBS_CHAN_NOT_FOUND:
 441         default:
 442                 return "failed";
 443         }
 444 }
 445 
 446 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
 447                                          struct iwl_rx_cmd_buffer *rxb)
 448 {
 449         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 450         struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
 451         bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 452 
 453         /* If this happens, the firmware has mistakenly sent an LMAC
 454          * notification during UMAC scans -- warn and ignore it.
 455          */
 456         if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
 457                                      IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
 458                 return;
 459 
 460         /* scan status must be locked for proper checking */
 461         lockdep_assert_held(&mvm->mutex);
 462 
 463         /* We first check if we were stopping a scan, in which case we
 464          * just clear the stopping flag.  Then we check if it was a
 465          * firmware initiated stop, in which case we need to inform
 466          * mac80211.
 467          * Note that we can have a stopping and a running scan
 468          * simultaneously, but we can't have two different types of
 469          * scans stopping or running at the same time (since LMAC
 470          * doesn't support it).
 471          */
 472 
 473         if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
 474                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
 475 
 476                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 477                                aborted ? "aborted" : "completed",
 478                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 479                 IWL_DEBUG_SCAN(mvm,
 480                                "Last line %d, Last iteration %d, Time after last iteration %d\n",
 481                                scan_notif->last_schedule_line,
 482                                scan_notif->last_schedule_iteration,
 483                                __le32_to_cpu(scan_notif->time_after_last_iter));
 484 
 485                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
 486         } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
 487                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
 488                                aborted ? "aborted" : "completed",
 489                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 490 
 491                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
 492         } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
 493                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
 494 
 495                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 496                                aborted ? "aborted" : "completed",
 497                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 498                 IWL_DEBUG_SCAN(mvm,
 499                                "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
 500                                scan_notif->last_schedule_line,
 501                                scan_notif->last_schedule_iteration,
 502                                __le32_to_cpu(scan_notif->time_after_last_iter));
 503 
 504                 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
 505                 ieee80211_sched_scan_stopped(mvm->hw);
 506                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 507         } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
 508                 struct cfg80211_scan_info info = {
 509                         .aborted = aborted,
 510                 };
 511 
 512                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
 513                                aborted ? "aborted" : "completed",
 514                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 515 
 516                 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
 517                 ieee80211_scan_completed(mvm->hw, &info);
 518                 cancel_delayed_work(&mvm->scan_timeout_dwork);
 519                 iwl_mvm_resume_tcm(mvm);
 520         } else {
 521                 IWL_ERR(mvm,
 522                         "got scan complete notification but no scan is running\n");
 523         }
 524 
 525         mvm->last_ebs_successful =
 526                         scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
 527                         scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
 528 }
 529 
 530 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 531 {
 532         int i;
 533 
 534         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 535                 if (!ssid_list[i].len)
 536                         break;
 537                 if (ssid_list[i].len == ssid_len &&
 538                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 539                         return i;
 540         }
 541         return -1;
 542 }
 543 
 544 /* We insert the SSIDs in an inverted order, because the FW will
 545  * invert it back.
 546  */
 547 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
 548                                  struct iwl_ssid_ie *ssids,
 549                                  u32 *ssid_bitmap)
 550 {
 551         int i, j;
 552         int index;
 553 
 554         /*
 555          * copy SSIDs from match list.
 556          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 557          * config match list.
 558          */
 559         for (i = 0, j = params->n_match_sets - 1;
 560              j >= 0 && i < PROBE_OPTION_MAX;
 561              i++, j--) {
 562                 /* skip empty SSID matchsets */
 563                 if (!params->match_sets[j].ssid.ssid_len)
 564                         continue;
 565                 ssids[i].id = WLAN_EID_SSID;
 566                 ssids[i].len = params->match_sets[j].ssid.ssid_len;
 567                 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
 568                        ssids[i].len);
 569         }
 570 
 571         /* add SSIDs from scan SSID list */
 572         *ssid_bitmap = 0;
 573         for (j = params->n_ssids - 1;
 574              j >= 0 && i < PROBE_OPTION_MAX;
 575              i++, j--) {
 576                 index = iwl_ssid_exist(params->ssids[j].ssid,
 577                                        params->ssids[j].ssid_len,
 578                                        ssids);
 579                 if (index < 0) {
 580                         ssids[i].id = WLAN_EID_SSID;
 581                         ssids[i].len = params->ssids[j].ssid_len;
 582                         memcpy(ssids[i].ssid, params->ssids[j].ssid,
 583                                ssids[i].len);
 584                         *ssid_bitmap |= BIT(i);
 585                 } else {
 586                         *ssid_bitmap |= BIT(index);
 587                 }
 588         }
 589 }
 590 
 591 static int
 592 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 593                                    struct cfg80211_sched_scan_request *req)
 594 {
 595         struct iwl_scan_offload_profile *profile;
 596         struct iwl_scan_offload_profile_cfg *profile_cfg;
 597         struct iwl_scan_offload_blacklist *blacklist;
 598         struct iwl_host_cmd cmd = {
 599                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 600                 .len[1] = sizeof(*profile_cfg),
 601                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 602                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 603         };
 604         int blacklist_len;
 605         int i;
 606         int ret;
 607 
 608         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 609                 return -EIO;
 610 
 611         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 612                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 613         else
 614                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 615 
 616         blacklist = kcalloc(blacklist_len, sizeof(*blacklist), GFP_KERNEL);
 617         if (!blacklist)
 618                 return -ENOMEM;
 619 
 620         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 621         if (!profile_cfg) {
 622                 ret = -ENOMEM;
 623                 goto free_blacklist;
 624         }
 625 
 626         cmd.data[0] = blacklist;
 627         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 628         cmd.data[1] = profile_cfg;
 629 
 630         /* No blacklist configuration */
 631 
 632         profile_cfg->num_profiles = req->n_match_sets;
 633         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 634         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 635         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 636         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 637                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 638 
 639         for (i = 0; i < req->n_match_sets; i++) {
 640                 profile = &profile_cfg->profiles[i];
 641                 profile->ssid_index = i;
 642                 /* Support any cipher and auth algorithm */
 643                 profile->unicast_cipher = 0xff;
 644                 profile->auth_alg = 0xff;
 645                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 646                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 647                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 648         }
 649 
 650         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 651 
 652         ret = iwl_mvm_send_cmd(mvm, &cmd);
 653         kfree(profile_cfg);
 654 free_blacklist:
 655         kfree(blacklist);
 656 
 657         return ret;
 658 }
 659 
 660 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
 661                                   struct cfg80211_sched_scan_request *req)
 662 {
 663         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 664                 IWL_DEBUG_SCAN(mvm,
 665                                "Sending scheduled scan with filtering, n_match_sets %d\n",
 666                                req->n_match_sets);
 667                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 668                 return false;
 669         }
 670 
 671         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
 672 
 673         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 674         return true;
 675 }
 676 
 677 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
 678 {
 679         int ret;
 680         struct iwl_host_cmd cmd = {
 681                 .id = SCAN_OFFLOAD_ABORT_CMD,
 682         };
 683         u32 status = CAN_ABORT_STATUS;
 684 
 685         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
 686         if (ret)
 687                 return ret;
 688 
 689         if (status != CAN_ABORT_STATUS) {
 690                 /*
 691                  * The scan abort will return 1 for success or
 692                  * 2 for "failure".  A failure condition can be
 693                  * due to simply not being in an active scan which
 694                  * can occur if we send the scan abort before the
 695                  * microcode has notified us that a scan is completed.
 696                  */
 697                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
 698                 ret = -ENOENT;
 699         }
 700 
 701         return ret;
 702 }
 703 
 704 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
 705                                      struct iwl_scan_req_tx_cmd *tx_cmd,
 706                                      bool no_cck)
 707 {
 708         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 709                                          TX_CMD_FLG_BT_DIS);
 710         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 711                                                            NL80211_BAND_2GHZ,
 712                                                            no_cck);
 713         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
 714 
 715         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 716                                          TX_CMD_FLG_BT_DIS);
 717         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 718                                                            NL80211_BAND_5GHZ,
 719                                                            no_cck);
 720         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
 721 }
 722 
 723 static void
 724 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
 725                                struct ieee80211_channel **channels,
 726                                int n_channels, u32 ssid_bitmap,
 727                                struct iwl_scan_req_lmac *cmd)
 728 {
 729         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
 730         int i;
 731 
 732         for (i = 0; i < n_channels; i++) {
 733                 channel_cfg[i].channel_num =
 734                         cpu_to_le16(channels[i]->hw_value);
 735                 channel_cfg[i].iter_count = cpu_to_le16(1);
 736                 channel_cfg[i].iter_interval = 0;
 737                 channel_cfg[i].flags =
 738                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
 739                                     ssid_bitmap);
 740         }
 741 }
 742 
 743 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 744                                            size_t len, u8 *const pos)
 745 {
 746         static const u8 before_ds_params[] = {
 747                         WLAN_EID_SSID,
 748                         WLAN_EID_SUPP_RATES,
 749                         WLAN_EID_REQUEST,
 750                         WLAN_EID_EXT_SUPP_RATES,
 751         };
 752         size_t offs;
 753         u8 *newpos = pos;
 754 
 755         if (!iwl_mvm_rrm_scan_needed(mvm)) {
 756                 memcpy(newpos, ies, len);
 757                 return newpos + len;
 758         }
 759 
 760         offs = ieee80211_ie_split(ies, len,
 761                                   before_ds_params,
 762                                   ARRAY_SIZE(before_ds_params),
 763                                   0);
 764 
 765         memcpy(newpos, ies, offs);
 766         newpos += offs;
 767 
 768         /* Add a placeholder for DS Parameter Set element */
 769         *newpos++ = WLAN_EID_DS_PARAMS;
 770         *newpos++ = 1;
 771         *newpos++ = 0;
 772 
 773         memcpy(newpos, ies + offs, len - offs);
 774         newpos += len - offs;
 775 
 776         return newpos;
 777 }
 778 
 779 #define WFA_TPC_IE_LEN  9
 780 
 781 static void iwl_mvm_add_tpc_report_ie(u8 *pos)
 782 {
 783         pos[0] = WLAN_EID_VENDOR_SPECIFIC;
 784         pos[1] = WFA_TPC_IE_LEN - 2;
 785         pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
 786         pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
 787         pos[4] = WLAN_OUI_MICROSOFT & 0xff;
 788         pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
 789         pos[6] = 0;
 790         /* pos[7] - tx power will be inserted by the FW */
 791         pos[7] = 0;
 792         pos[8] = 0;
 793 }
 794 
 795 static void
 796 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 797                          struct ieee80211_scan_ies *ies,
 798                          struct iwl_mvm_scan_params *params)
 799 {
 800         struct ieee80211_mgmt *frame = (void *)params->preq.buf;
 801         u8 *pos, *newpos;
 802         const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
 803                 params->mac_addr : NULL;
 804 
 805         /*
 806          * Unfortunately, right now the offload scan doesn't support randomising
 807          * within the firmware, so until the firmware API is ready we implement
 808          * it in the driver. This means that the scan iterations won't really be
 809          * random, only when it's restarted, but at least that helps a bit.
 810          */
 811         if (mac_addr)
 812                 get_random_mask_addr(frame->sa, mac_addr,
 813                                      params->mac_addr_mask);
 814         else
 815                 memcpy(frame->sa, vif->addr, ETH_ALEN);
 816 
 817         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 818         eth_broadcast_addr(frame->da);
 819         eth_broadcast_addr(frame->bssid);
 820         frame->seq_ctrl = 0;
 821 
 822         pos = frame->u.probe_req.variable;
 823         *pos++ = WLAN_EID_SSID;
 824         *pos++ = 0;
 825 
 826         params->preq.mac_header.offset = 0;
 827         params->preq.mac_header.len = cpu_to_le16(24 + 2);
 828 
 829         /* Insert ds parameter set element on 2.4 GHz band */
 830         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
 831                                                  ies->ies[NL80211_BAND_2GHZ],
 832                                                  ies->len[NL80211_BAND_2GHZ],
 833                                                  pos);
 834         params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
 835         params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
 836         pos = newpos;
 837 
 838         memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
 839                ies->len[NL80211_BAND_5GHZ]);
 840         params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
 841         params->preq.band_data[1].len =
 842                 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
 843         pos += ies->len[NL80211_BAND_5GHZ];
 844 
 845         memcpy(pos, ies->common_ies, ies->common_ie_len);
 846         params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
 847 
 848         if (iwl_mvm_rrm_scan_needed(mvm) &&
 849             !fw_has_capa(&mvm->fw->ucode_capa,
 850                          IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
 851                 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
 852                 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
 853                                                            WFA_TPC_IE_LEN);
 854         } else {
 855                 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
 856         }
 857 }
 858 
 859 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
 860                                     struct iwl_scan_req_lmac *cmd,
 861                                     struct iwl_mvm_scan_params *params)
 862 {
 863         cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
 864         cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
 865         cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
 866         cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
 867         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
 868         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
 869         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
 870 }
 871 
 872 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
 873                                      struct ieee80211_scan_ies *ies,
 874                                      int n_channels)
 875 {
 876         return ((n_ssids <= PROBE_OPTION_MAX) &&
 877                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
 878                 (ies->common_ie_len +
 879                  ies->len[NL80211_BAND_2GHZ] +
 880                  ies->len[NL80211_BAND_5GHZ] <=
 881                  iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
 882 }
 883 
 884 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 885                                         struct ieee80211_vif *vif)
 886 {
 887         const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
 888         bool low_latency;
 889 
 890         if (iwl_mvm_is_cdb_supported(mvm))
 891                 low_latency = iwl_mvm_low_latency_band(mvm, NL80211_BAND_5GHZ);
 892         else
 893                 low_latency = iwl_mvm_low_latency(mvm);
 894 
 895         /* We can only use EBS if:
 896          *      1. the feature is supported;
 897          *      2. the last EBS was successful;
 898          *      3. if only single scan, the single scan EBS API is supported;
 899          *      4. it's not a p2p find operation.
 900          *      5. we are not in low latency mode,
 901          *         or if fragmented ebs is supported by the FW
 902          */
 903         return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 904                 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
 905                 vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 906                 (!low_latency || iwl_mvm_is_frag_ebs_supported(mvm)));
 907 }
 908 
 909 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
 910 {
 911         return params->n_scan_plans == 1 &&
 912                 params->scan_plans[0].iterations == 1;
 913 }
 914 
 915 static bool iwl_mvm_is_scan_fragmented(enum iwl_mvm_scan_type type)
 916 {
 917         return (type == IWL_SCAN_TYPE_FRAGMENTED ||
 918                 type == IWL_SCAN_TYPE_FAST_BALANCE);
 919 }
 920 
 921 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 922                                    struct iwl_mvm_scan_params *params,
 923                                    struct ieee80211_vif *vif)
 924 {
 925         int flags = 0;
 926 
 927         if (params->n_ssids == 0)
 928                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
 929 
 930         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
 931                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
 932 
 933         if (iwl_mvm_is_scan_fragmented(params->type))
 934                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 935 
 936         if (iwl_mvm_rrm_scan_needed(mvm) &&
 937             fw_has_capa(&mvm->fw->ucode_capa,
 938                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 939                 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 940 
 941         if (params->pass_all)
 942                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
 943         else
 944                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
 945 
 946 #ifdef CONFIG_IWLWIFI_DEBUGFS
 947         if (mvm->scan_iter_notif_enabled)
 948                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 949 #endif
 950 
 951         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
 952                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 953 
 954         if (iwl_mvm_is_regular_scan(params) &&
 955             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 956             !iwl_mvm_is_scan_fragmented(params->type))
 957                 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
 958 
 959         return flags;
 960 }
 961 
 962 static void
 963 iwl_mvm_scan_set_legacy_probe_req(struct iwl_scan_probe_req_v1 *p_req,
 964                                   struct iwl_scan_probe_req *src_p_req)
 965 {
 966         int i;
 967 
 968         p_req->mac_header = src_p_req->mac_header;
 969         for (i = 0; i < SCAN_NUM_BAND_PROBE_DATA_V_1; i++)
 970                 p_req->band_data[i] = src_p_req->band_data[i];
 971         p_req->common_data = src_p_req->common_data;
 972         memcpy(p_req->buf, src_p_req->buf, sizeof(p_req->buf));
 973 }
 974 
 975 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 976                              struct iwl_mvm_scan_params *params)
 977 {
 978         struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
 979         struct iwl_scan_probe_req_v1 *preq =
 980                 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
 981                          mvm->fw->ucode_capa.n_scan_channels);
 982         u32 ssid_bitmap = 0;
 983         int i;
 984 
 985         lockdep_assert_held(&mvm->mutex);
 986 
 987         memset(cmd, 0, ksize(cmd));
 988 
 989         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
 990                 return -EINVAL;
 991 
 992         iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
 993 
 994         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
 995         cmd->iter_num = cpu_to_le32(1);
 996         cmd->n_channels = (u8)params->n_channels;
 997 
 998         cmd->delay = cpu_to_le32(params->delay);
 999 
1000         cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
1001                                                               vif));
1002 
1003         cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
1004         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1005                                         MAC_FILTER_IN_BEACON);
1006         iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
1007         iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
1008 
1009         /* this API uses bits 1-20 instead of 0-19 */
1010         ssid_bitmap <<= 1;
1011 
1012         for (i = 0; i < params->n_scan_plans; i++) {
1013                 struct cfg80211_sched_scan_plan *scan_plan =
1014                         &params->scan_plans[i];
1015 
1016                 cmd->schedule[i].delay =
1017                         cpu_to_le16(scan_plan->interval);
1018                 cmd->schedule[i].iterations = scan_plan->iterations;
1019                 cmd->schedule[i].full_scan_mul = 1;
1020         }
1021 
1022         /*
1023          * If the number of iterations of the last scan plan is set to
1024          * zero, it should run infinitely. However, this is not always the case.
1025          * For example, when regular scan is requested the driver sets one scan
1026          * plan with one iteration.
1027          */
1028         if (!cmd->schedule[i - 1].iterations)
1029                 cmd->schedule[i - 1].iterations = 0xff;
1030 
1031         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
1032                 cmd->channel_opt[0].flags =
1033                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1034                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1035                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1036                 cmd->channel_opt[0].non_ebs_ratio =
1037                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
1038                 cmd->channel_opt[1].flags =
1039                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1040                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1041                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1042                 cmd->channel_opt[1].non_ebs_ratio =
1043                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1044         }
1045 
1046         iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
1047                                        params->n_channels, ssid_bitmap, cmd);
1048 
1049         iwl_mvm_scan_set_legacy_probe_req(preq, &params->preq);
1050 
1051         return 0;
1052 }
1053 
1054 static int rate_to_scan_rate_flag(unsigned int rate)
1055 {
1056         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1057                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
1058                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
1059                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
1060                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
1061                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
1062                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
1063                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
1064                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
1065                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
1066                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
1067                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
1068                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
1069         };
1070 
1071         return rate_to_scan_rate[rate];
1072 }
1073 
1074 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1075 {
1076         struct ieee80211_supported_band *band;
1077         unsigned int rates = 0;
1078         int i;
1079 
1080         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1081         for (i = 0; i < band->n_bitrates; i++)
1082                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1083         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1084         for (i = 0; i < band->n_bitrates; i++)
1085                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1086 
1087         /* Set both basic rates and supported rates */
1088         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1089 
1090         return cpu_to_le32(rates);
1091 }
1092 
1093 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
1094                                     struct iwl_scan_dwell *dwell)
1095 {
1096         dwell->active = IWL_SCAN_DWELL_ACTIVE;
1097         dwell->passive = IWL_SCAN_DWELL_PASSIVE;
1098         dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
1099         dwell->extended = IWL_SCAN_DWELL_EXTENDED;
1100 }
1101 
1102 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels,
1103                                   u32 max_channels)
1104 {
1105         struct ieee80211_supported_band *band;
1106         int i, j = 0;
1107 
1108         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1109         for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1110                 channels[j] = band->channels[i].hw_value;
1111         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1112         for (i = 0; i < band->n_channels && j < max_channels; i++, j++)
1113                 channels[j] = band->channels[i].hw_value;
1114 }
1115 
1116 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
1117                                         u32 flags, u8 channel_flags,
1118                                         u32 max_channels)
1119 {
1120         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, NULL);
1121         struct iwl_scan_config_v1 *cfg = config;
1122 
1123         cfg->flags = cpu_to_le32(flags);
1124         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1125         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1126         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1127         cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
1128         cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
1129 
1130         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1131 
1132         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1133 
1134         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1135         cfg->channel_flags = channel_flags;
1136 
1137         iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1138 }
1139 
1140 static void iwl_mvm_fill_scan_config_v2(struct iwl_mvm *mvm, void *config,
1141                                         u32 flags, u8 channel_flags,
1142                                         u32 max_channels)
1143 {
1144         struct iwl_scan_config_v2 *cfg = config;
1145 
1146         cfg->flags = cpu_to_le32(flags);
1147         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1148         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1149         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1150 
1151         if (iwl_mvm_is_cdb_supported(mvm)) {
1152                 enum iwl_mvm_scan_type lb_type, hb_type;
1153 
1154                 lb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1155                                                      NL80211_BAND_2GHZ);
1156                 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1157                                                      NL80211_BAND_5GHZ);
1158 
1159                 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1160                         cpu_to_le32(scan_timing[lb_type].max_out_time);
1161                 cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1162                         cpu_to_le32(scan_timing[lb_type].suspend_time);
1163 
1164                 cfg->out_of_channel_time[SCAN_HB_LMAC_IDX] =
1165                         cpu_to_le32(scan_timing[hb_type].max_out_time);
1166                 cfg->suspend_time[SCAN_HB_LMAC_IDX] =
1167                         cpu_to_le32(scan_timing[hb_type].suspend_time);
1168         } else {
1169                 enum iwl_mvm_scan_type type =
1170                         iwl_mvm_get_scan_type(mvm, NULL);
1171 
1172                 cfg->out_of_channel_time[SCAN_LB_LMAC_IDX] =
1173                         cpu_to_le32(scan_timing[type].max_out_time);
1174                 cfg->suspend_time[SCAN_LB_LMAC_IDX] =
1175                         cpu_to_le32(scan_timing[type].suspend_time);
1176         }
1177 
1178         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1179 
1180         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1181 
1182         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1183         cfg->channel_flags = channel_flags;
1184 
1185         iwl_mvm_fill_channels(mvm, cfg->channel_array, max_channels);
1186 }
1187 
1188 static int iwl_mvm_legacy_config_scan(struct iwl_mvm *mvm)
1189 {
1190         void *cfg;
1191         int ret, cmd_size;
1192         struct iwl_host_cmd cmd = {
1193                 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
1194         };
1195         enum iwl_mvm_scan_type type;
1196         enum iwl_mvm_scan_type hb_type = IWL_SCAN_TYPE_NOT_SET;
1197         int num_channels =
1198                 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1199                 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1200         u32 flags;
1201         u8 channel_flags;
1202 
1203         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1204                 num_channels = mvm->fw->ucode_capa.n_scan_channels;
1205 
1206         if (iwl_mvm_is_cdb_supported(mvm)) {
1207                 type = iwl_mvm_get_scan_type_band(mvm, NULL,
1208                                                   NL80211_BAND_2GHZ);
1209                 hb_type = iwl_mvm_get_scan_type_band(mvm, NULL,
1210                                                      NL80211_BAND_5GHZ);
1211                 if (type == mvm->scan_type && hb_type == mvm->hb_scan_type)
1212                         return 0;
1213         } else {
1214                 type = iwl_mvm_get_scan_type(mvm, NULL);
1215                 if (type == mvm->scan_type)
1216                         return 0;
1217         }
1218 
1219         if (iwl_mvm_cdb_scan_api(mvm))
1220                 cmd_size = sizeof(struct iwl_scan_config_v2);
1221         else
1222                 cmd_size = sizeof(struct iwl_scan_config_v1);
1223         cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1224 
1225         cfg = kzalloc(cmd_size, GFP_KERNEL);
1226         if (!cfg)
1227                 return -ENOMEM;
1228 
1229         flags = SCAN_CONFIG_FLAG_ACTIVATE |
1230                  SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1231                  SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1232                  SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1233                  SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1234                  SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1235                  SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1236                  SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1237                  SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1238                  SCAN_CONFIG_N_CHANNELS(num_channels) |
1239                  (iwl_mvm_is_scan_fragmented(type) ?
1240                   SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1241                   SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1242 
1243         channel_flags = IWL_CHANNEL_FLAG_EBS |
1244                         IWL_CHANNEL_FLAG_ACCURATE_EBS |
1245                         IWL_CHANNEL_FLAG_EBS_ADD |
1246                         IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1247 
1248         /*
1249          * Check for fragmented scan on LMAC2 - high band.
1250          * LMAC1 - low band is checked above.
1251          */
1252         if (iwl_mvm_cdb_scan_api(mvm)) {
1253                 if (iwl_mvm_is_cdb_supported(mvm))
1254                         flags |= (iwl_mvm_is_scan_fragmented(hb_type)) ?
1255                                  SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1256                                  SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1257                 iwl_mvm_fill_scan_config_v2(mvm, cfg, flags, channel_flags,
1258                                             num_channels);
1259         } else {
1260                 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags,
1261                                             num_channels);
1262         }
1263 
1264         cmd.data[0] = cfg;
1265         cmd.len[0] = cmd_size;
1266         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1267 
1268         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1269 
1270         ret = iwl_mvm_send_cmd(mvm, &cmd);
1271         if (!ret) {
1272                 mvm->scan_type = type;
1273                 mvm->hb_scan_type = hb_type;
1274         }
1275 
1276         kfree(cfg);
1277         return ret;
1278 }
1279 
1280 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1281 {
1282         struct iwl_scan_config cfg;
1283         struct iwl_host_cmd cmd = {
1284                 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
1285                 .len[0] = sizeof(cfg),
1286                 .data[0] = &cfg,
1287                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
1288         };
1289 
1290         if (!iwl_mvm_is_reduced_config_scan_supported(mvm))
1291                 return iwl_mvm_legacy_config_scan(mvm);
1292 
1293         memset(&cfg, 0, sizeof(cfg));
1294 
1295         cfg.bcast_sta_id = mvm->aux_sta.sta_id;
1296         cfg.tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1297         cfg.rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1298 
1299         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1300 
1301         return iwl_mvm_send_cmd(mvm, &cmd);
1302 }
1303 
1304 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1305 {
1306         int i;
1307 
1308         for (i = 0; i < mvm->max_scans; i++)
1309                 if (mvm->scan_uid_status[i] == status)
1310                         return i;
1311 
1312         return -ENOENT;
1313 }
1314 
1315 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1316                                     struct iwl_scan_req_umac *cmd,
1317                                     struct iwl_mvm_scan_params *params)
1318 {
1319         struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1320         u8 active_dwell, passive_dwell;
1321 
1322         timing = &scan_timing[params->type];
1323         active_dwell = params->measurement_dwell ?
1324                 params->measurement_dwell : IWL_SCAN_DWELL_ACTIVE;
1325         passive_dwell = params->measurement_dwell ?
1326                 params->measurement_dwell : IWL_SCAN_DWELL_PASSIVE;
1327 
1328         if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1329                 cmd->v7.adwell_default_n_aps_social =
1330                         IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1331                 cmd->v7.adwell_default_n_aps =
1332                         IWL_SCAN_ADWELL_DEFAULT_LB_N_APS;
1333 
1334                 if (iwl_mvm_is_adwell_hb_ap_num_supported(mvm))
1335                         cmd->v9.adwell_default_hb_n_aps =
1336                                 IWL_SCAN_ADWELL_DEFAULT_HB_N_APS;
1337 
1338                 /* if custom max budget was configured with debugfs */
1339                 if (IWL_MVM_ADWELL_MAX_BUDGET)
1340                         cmd->v7.adwell_max_budget =
1341                                 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1342                 else if (params->ssids && params->ssids[0].ssid_len)
1343                         cmd->v7.adwell_max_budget =
1344                                 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1345                 else
1346                         cmd->v7.adwell_max_budget =
1347                                 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1348 
1349                 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1350                 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1351                         cpu_to_le32(timing->max_out_time);
1352                 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1353                         cpu_to_le32(timing->suspend_time);
1354 
1355                 if (iwl_mvm_is_cdb_supported(mvm)) {
1356                         hb_timing = &scan_timing[params->hb_type];
1357 
1358                         cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1359                                 cpu_to_le32(hb_timing->max_out_time);
1360                         cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1361                                 cpu_to_le32(hb_timing->suspend_time);
1362                 }
1363 
1364                 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1365                         cmd->v7.active_dwell = active_dwell;
1366                         cmd->v7.passive_dwell = passive_dwell;
1367                         cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1368                 } else {
1369                         cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1370                         cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1371                         if (iwl_mvm_is_cdb_supported(mvm)) {
1372                                 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
1373                                         active_dwell;
1374                                 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
1375                                         passive_dwell;
1376                         }
1377                 }
1378         } else {
1379                 cmd->v1.extended_dwell = params->measurement_dwell ?
1380                         params->measurement_dwell : IWL_SCAN_DWELL_EXTENDED;
1381                 cmd->v1.active_dwell = active_dwell;
1382                 cmd->v1.passive_dwell = passive_dwell;
1383                 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1384 
1385                 if (iwl_mvm_is_cdb_supported(mvm)) {
1386                         hb_timing = &scan_timing[params->hb_type];
1387 
1388                         cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1389                                         cpu_to_le32(hb_timing->max_out_time);
1390                         cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1391                                         cpu_to_le32(hb_timing->suspend_time);
1392                 }
1393 
1394                 if (iwl_mvm_cdb_scan_api(mvm)) {
1395                         cmd->v6.scan_priority =
1396                                 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1397                         cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1398                                 cpu_to_le32(timing->max_out_time);
1399                         cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1400                                 cpu_to_le32(timing->suspend_time);
1401                 } else {
1402                         cmd->v1.scan_priority =
1403                                 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1404                         cmd->v1.max_out_time =
1405                                 cpu_to_le32(timing->max_out_time);
1406                         cmd->v1.suspend_time =
1407                                 cpu_to_le32(timing->suspend_time);
1408                 }
1409         }
1410 
1411         if (iwl_mvm_is_regular_scan(params))
1412                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1413         else
1414                 cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_2);
1415 }
1416 
1417 static void
1418 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1419                                struct ieee80211_channel **channels,
1420                                int n_channels, u32 ssid_bitmap,
1421                                struct iwl_scan_channel_cfg_umac *channel_cfg)
1422 {
1423         int i;
1424 
1425         for (i = 0; i < n_channels; i++) {
1426                 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1427                 channel_cfg[i].v1.channel_num = channels[i]->hw_value;
1428                 if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
1429                         channel_cfg[i].v2.band =
1430                                 channels[i]->hw_value <= IWL_SCAN_LAST_2_4_CHN ?
1431                                         IWL_SCAN_BAND_2_4 : IWL_SCAN_BAND_5_2;
1432                         channel_cfg[i].v2.iter_count = 1;
1433                         channel_cfg[i].v2.iter_interval = 0;
1434                 } else {
1435                         channel_cfg[i].v1.iter_count = 1;
1436                         channel_cfg[i].v1.iter_interval = 0;
1437                 }
1438         }
1439 }
1440 
1441 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1442                                    struct iwl_mvm_scan_params *params,
1443                                    struct ieee80211_vif *vif)
1444 {
1445         u16 flags = 0;
1446 
1447         if (params->n_ssids == 0)
1448                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1449 
1450         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1451                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1452 
1453         if (iwl_mvm_is_scan_fragmented(params->type))
1454                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1455 
1456         if (iwl_mvm_is_cdb_supported(mvm) &&
1457             iwl_mvm_is_scan_fragmented(params->hb_type))
1458                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
1459 
1460         if (iwl_mvm_rrm_scan_needed(mvm) &&
1461             fw_has_capa(&mvm->fw->ucode_capa,
1462                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
1463                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1464 
1465         if (params->pass_all)
1466                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1467         else
1468                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1469 
1470         if (!iwl_mvm_is_regular_scan(params))
1471                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1472 
1473         if (params->measurement_dwell)
1474                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1475 
1476 #ifdef CONFIG_IWLWIFI_DEBUGFS
1477         if (mvm->scan_iter_notif_enabled)
1478                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1479 #endif
1480 
1481         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1482                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1483 
1484         if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE &&
1485             vif->type != NL80211_IFTYPE_P2P_DEVICE)
1486                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
1487 
1488         /*
1489          * Extended dwell is relevant only for low band to start with, as it is
1490          * being used for social channles only (1, 6, 11), so we can check
1491          * only scan type on low band also for CDB.
1492          */
1493         if (iwl_mvm_is_regular_scan(params) &&
1494             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1495             !iwl_mvm_is_scan_fragmented(params->type) &&
1496             !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
1497             !iwl_mvm_is_oce_supported(mvm))
1498                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1499 
1500         if (iwl_mvm_is_oce_supported(mvm)) {
1501                 if ((params->flags &
1502                      NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
1503                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
1504                 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
1505                  * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
1506                  * the same bit, we need to make sure that we use this bit here
1507                  * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
1508                  * used. */
1509                 if ((params->flags &
1510                      NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
1511                      !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
1512                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
1513                 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
1514                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
1515         }
1516 
1517         return flags;
1518 }
1519 
1520 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1521                              struct iwl_mvm_scan_params *params,
1522                              int type)
1523 {
1524         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1525         struct iwl_scan_umac_chan_param *chan_param;
1526         void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
1527         void *sec_part = cmd_data + sizeof(struct iwl_scan_channel_cfg_umac) *
1528                 mvm->fw->ucode_capa.n_scan_channels;
1529         struct iwl_scan_req_umac_tail_v2 *tail_v2 =
1530                 (struct iwl_scan_req_umac_tail_v2 *)sec_part;
1531         struct iwl_scan_req_umac_tail_v1 *tail_v1;
1532         struct iwl_ssid_ie *direct_scan;
1533         int uid, i;
1534         u32 ssid_bitmap = 0;
1535         u8 channel_flags = 0;
1536         u16 gen_flags;
1537         struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
1538 
1539         chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
1540 
1541         lockdep_assert_held(&mvm->mutex);
1542 
1543         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1544                 return -EINVAL;
1545 
1546         uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1547         if (uid < 0)
1548                 return uid;
1549 
1550         memset(cmd, 0, ksize(cmd));
1551 
1552         iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1553 
1554         mvm->scan_uid_status[uid] = type;
1555 
1556         cmd->uid = cpu_to_le32(uid);
1557         gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
1558         cmd->general_flags = cpu_to_le16(gen_flags);
1559         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1560                 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
1561                         cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
1562                                                         IWL_SCAN_NUM_OF_FRAGS;
1563                 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
1564                         cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
1565                                                         IWL_SCAN_NUM_OF_FRAGS;
1566 
1567                 cmd->v8.general_flags2 =
1568                         IWL_UMAC_SCAN_GEN_FLAGS2_ALLOW_CHNL_REORDER;
1569         }
1570 
1571         cmd->scan_start_mac_id = scan_vif->id;
1572 
1573         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1574                 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1575 
1576         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
1577                 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1578                                 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1579                                 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1580 
1581                 /* set fragmented ebs for fragmented scan on HB channels */
1582                 if (iwl_mvm_is_frag_ebs_supported(mvm)) {
1583                         if (gen_flags &
1584                             IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED ||
1585                             (!iwl_mvm_is_cdb_supported(mvm) &&
1586                              gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED))
1587                                 channel_flags |= IWL_SCAN_CHANNEL_FLAG_EBS_FRAG;
1588                 }
1589         }
1590 
1591         chan_param->flags = channel_flags;
1592         chan_param->count = params->n_channels;
1593 
1594         for (i = 0; i < params->n_scan_plans; i++) {
1595                 struct cfg80211_sched_scan_plan *scan_plan =
1596                         &params->scan_plans[i];
1597 
1598                 tail_v2->schedule[i].iter_count = scan_plan->iterations;
1599                 tail_v2->schedule[i].interval =
1600                         cpu_to_le16(scan_plan->interval);
1601         }
1602 
1603         /*
1604          * If the number of iterations of the last scan plan is set to
1605          * zero, it should run infinitely. However, this is not always the case.
1606          * For example, when regular scan is requested the driver sets one scan
1607          * plan with one iteration.
1608          */
1609         if (!tail_v2->schedule[i - 1].iter_count)
1610                 tail_v2->schedule[i - 1].iter_count = 0xff;
1611 
1612         tail_v2->delay = cpu_to_le16(params->delay);
1613 
1614         if (iwl_mvm_is_scan_ext_chan_supported(mvm)) {
1615                 tail_v2->preq = params->preq;
1616                 direct_scan = tail_v2->direct_scan;
1617         } else {
1618                 tail_v1 = (struct iwl_scan_req_umac_tail_v1 *)sec_part;
1619                 iwl_mvm_scan_set_legacy_probe_req(&tail_v1->preq,
1620                                                   &params->preq);
1621                 direct_scan = tail_v1->direct_scan;
1622         }
1623         iwl_scan_build_ssids(params, direct_scan, &ssid_bitmap);
1624         iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1625                                        params->n_channels, ssid_bitmap,
1626                                        cmd_data);
1627         return 0;
1628 }
1629 
1630 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1631 {
1632         return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1633 }
1634 
1635 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1636 {
1637         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1638                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1639 
1640         /* This looks a bit arbitrary, but the idea is that if we run
1641          * out of possible simultaneous scans and the userspace is
1642          * trying to run a scan type that is already running, we
1643          * return -EBUSY.  But if the userspace wants to start a
1644          * different type of scan, we stop the opposite type to make
1645          * space for the new request.  The reason is backwards
1646          * compatibility with old wpa_supplicant that wouldn't stop a
1647          * scheduled scan before starting a normal scan.
1648          */
1649 
1650         /* FW supports only a single periodic scan */
1651         if ((type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) &&
1652             mvm->scan_status & (IWL_MVM_SCAN_SCHED | IWL_MVM_SCAN_NETDETECT))
1653                 return -EBUSY;
1654 
1655         if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1656                 return 0;
1657 
1658         /* Use a switch, even though this is a bitmask, so that more
1659          * than one bits set will fall in default and we will warn.
1660          */
1661         switch (type) {
1662         case IWL_MVM_SCAN_REGULAR:
1663                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1664                         return -EBUSY;
1665                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1666         case IWL_MVM_SCAN_SCHED:
1667                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1668                         return -EBUSY;
1669                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1670         case IWL_MVM_SCAN_NETDETECT:
1671                 /* For non-unified images, there's no need to stop
1672                  * anything for net-detect since the firmware is
1673                  * restarted anyway.  This way, any sched scans that
1674                  * were running will be restarted when we resume.
1675                  */
1676                 if (!unified_image)
1677                         return 0;
1678 
1679                 /* If this is a unified image and we ran out of scans,
1680                  * we need to stop something.  Prefer stopping regular
1681                  * scans, because the results are useless at this
1682                  * point, and we should be able to keep running
1683                  * another scheduled scan while suspended.
1684                  */
1685                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1686                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
1687                                                  true);
1688                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1689                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
1690                                                  true);
1691                 /* Something is wrong if no scan was running but we
1692                  * ran out of scans.
1693                  */
1694                 /* fall through */
1695         default:
1696                 WARN_ON(1);
1697                 break;
1698         }
1699 
1700         return -EIO;
1701 }
1702 
1703 #define SCAN_TIMEOUT 20000
1704 
1705 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
1706 {
1707         struct delayed_work *delayed_work = to_delayed_work(work);
1708         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1709                                            scan_timeout_dwork);
1710 
1711         IWL_ERR(mvm, "regular scan timed out\n");
1712 
1713         iwl_force_nmi(mvm->trans);
1714 }
1715 
1716 static void iwl_mvm_fill_scan_type(struct iwl_mvm *mvm,
1717                                    struct iwl_mvm_scan_params *params,
1718                                    struct ieee80211_vif *vif)
1719 {
1720         if (iwl_mvm_is_cdb_supported(mvm)) {
1721                 params->type =
1722                         iwl_mvm_get_scan_type_band(mvm, vif,
1723                                                    NL80211_BAND_2GHZ);
1724                 params->hb_type =
1725                         iwl_mvm_get_scan_type_band(mvm, vif,
1726                                                    NL80211_BAND_5GHZ);
1727         } else {
1728                 params->type = iwl_mvm_get_scan_type(mvm, vif);
1729         }
1730 }
1731 
1732 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1733                            struct cfg80211_scan_request *req,
1734                            struct ieee80211_scan_ies *ies)
1735 {
1736         struct iwl_host_cmd hcmd = {
1737                 .len = { iwl_mvm_scan_size(mvm), },
1738                 .data = { mvm->scan_cmd, },
1739                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1740         };
1741         struct iwl_mvm_scan_params params = {};
1742         int ret;
1743         struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1744 
1745         lockdep_assert_held(&mvm->mutex);
1746 
1747         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1748                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1749                 return -EBUSY;
1750         }
1751 
1752         ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1753         if (ret)
1754                 return ret;
1755 
1756         /* we should have failed registration if scan_cmd was NULL */
1757         if (WARN_ON(!mvm->scan_cmd))
1758                 return -ENOMEM;
1759 
1760         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1761                 return -ENOBUFS;
1762 
1763         params.n_ssids = req->n_ssids;
1764         params.flags = req->flags;
1765         params.n_channels = req->n_channels;
1766         params.delay = 0;
1767         params.ssids = req->ssids;
1768         params.channels = req->channels;
1769         params.mac_addr = req->mac_addr;
1770         params.mac_addr_mask = req->mac_addr_mask;
1771         params.no_cck = req->no_cck;
1772         params.pass_all = true;
1773         params.n_match_sets = 0;
1774         params.match_sets = NULL;
1775 
1776         params.scan_plans = &scan_plan;
1777         params.n_scan_plans = 1;
1778 
1779         iwl_mvm_fill_scan_type(mvm, &params, vif);
1780 
1781         ret = iwl_mvm_get_measurement_dwell(mvm, req, &params);
1782         if (ret < 0)
1783                 return ret;
1784 
1785         params.measurement_dwell = ret;
1786 
1787         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1788 
1789         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1790                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1791                 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1792                                         IWL_MVM_SCAN_REGULAR);
1793         } else {
1794                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1795                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1796         }
1797 
1798         if (ret)
1799                 return ret;
1800 
1801         iwl_mvm_pause_tcm(mvm, false);
1802 
1803         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1804         if (ret) {
1805                 /* If the scan failed, it usually means that the FW was unable
1806                  * to allocate the time events. Warn on it, but maybe we
1807                  * should try to send the command again with different params.
1808                  */
1809                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1810                 iwl_mvm_resume_tcm(mvm);
1811                 return ret;
1812         }
1813 
1814         IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1815         mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1816         mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
1817 
1818         schedule_delayed_work(&mvm->scan_timeout_dwork,
1819                               msecs_to_jiffies(SCAN_TIMEOUT));
1820 
1821         return 0;
1822 }
1823 
1824 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1825                              struct ieee80211_vif *vif,
1826                              struct cfg80211_sched_scan_request *req,
1827                              struct ieee80211_scan_ies *ies,
1828                              int type)
1829 {
1830         struct iwl_host_cmd hcmd = {
1831                 .len = { iwl_mvm_scan_size(mvm), },
1832                 .data = { mvm->scan_cmd, },
1833                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1834         };
1835         struct iwl_mvm_scan_params params = {};
1836         int ret;
1837 
1838         lockdep_assert_held(&mvm->mutex);
1839 
1840         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1841                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1842                 return -EBUSY;
1843         }
1844 
1845         ret = iwl_mvm_check_running_scans(mvm, type);
1846         if (ret)
1847                 return ret;
1848 
1849         /* we should have failed registration if scan_cmd was NULL */
1850         if (WARN_ON(!mvm->scan_cmd))
1851                 return -ENOMEM;
1852 
1853         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1854                 return -ENOBUFS;
1855 
1856         params.n_ssids = req->n_ssids;
1857         params.flags = req->flags;
1858         params.n_channels = req->n_channels;
1859         params.ssids = req->ssids;
1860         params.channels = req->channels;
1861         params.mac_addr = req->mac_addr;
1862         params.mac_addr_mask = req->mac_addr_mask;
1863         params.no_cck = false;
1864         params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
1865         params.n_match_sets = req->n_match_sets;
1866         params.match_sets = req->match_sets;
1867         if (!req->n_scan_plans)
1868                 return -EINVAL;
1869 
1870         params.n_scan_plans = req->n_scan_plans;
1871         params.scan_plans = req->scan_plans;
1872 
1873         iwl_mvm_fill_scan_type(mvm, &params, vif);
1874 
1875         /* In theory, LMAC scans can handle a 32-bit delay, but since
1876          * waiting for over 18 hours to start the scan is a bit silly
1877          * and to keep it aligned with UMAC scans (which only support
1878          * 16-bit delays), trim it down to 16-bits.
1879          */
1880         if (req->delay > U16_MAX) {
1881                 IWL_DEBUG_SCAN(mvm,
1882                                "delay value is > 16-bits, set to max possible\n");
1883                 params.delay = U16_MAX;
1884         } else {
1885                 params.delay = req->delay;
1886         }
1887 
1888         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1889         if (ret)
1890                 return ret;
1891 
1892         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1893 
1894         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1895                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1896                 ret = iwl_mvm_scan_umac(mvm, vif, &params, type);
1897         } else {
1898                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1899                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1900         }
1901 
1902         if (ret)
1903                 return ret;
1904 
1905         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1906         if (!ret) {
1907                 IWL_DEBUG_SCAN(mvm,
1908                                "Sched scan request was sent successfully\n");
1909                 mvm->scan_status |= type;
1910         } else {
1911                 /* If the scan failed, it usually means that the FW was unable
1912                  * to allocate the time events. Warn on it, but maybe we
1913                  * should try to send the command again with different params.
1914                  */
1915                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1916         }
1917 
1918         return ret;
1919 }
1920 
1921 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1922                                          struct iwl_rx_cmd_buffer *rxb)
1923 {
1924         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1925         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1926         u32 uid = __le32_to_cpu(notif->uid);
1927         bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1928 
1929         if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1930                 return;
1931 
1932         /* if the scan is already stopping, we don't need to notify mac80211 */
1933         if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1934                 struct cfg80211_scan_info info = {
1935                         .aborted = aborted,
1936                         .scan_start_tsf = mvm->scan_start,
1937                 };
1938 
1939                 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN);
1940                 ieee80211_scan_completed(mvm->hw, &info);
1941                 mvm->scan_vif = NULL;
1942                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1943                 iwl_mvm_resume_tcm(mvm);
1944         } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1945                 ieee80211_sched_scan_stopped(mvm->hw);
1946                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1947         }
1948 
1949         mvm->scan_status &= ~mvm->scan_uid_status[uid];
1950         IWL_DEBUG_SCAN(mvm,
1951                        "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1952                        uid, mvm->scan_uid_status[uid],
1953                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1954                                 "completed" : "aborted",
1955                        iwl_mvm_ebs_status_str(notif->ebs_status));
1956         IWL_DEBUG_SCAN(mvm,
1957                        "Last line %d, Last iteration %d, Time from last iteration %d\n",
1958                        notif->last_schedule, notif->last_iter,
1959                        __le32_to_cpu(notif->time_from_last_iter));
1960 
1961         if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1962             notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1963                 mvm->last_ebs_successful = false;
1964 
1965         mvm->scan_uid_status[uid] = 0;
1966 }
1967 
1968 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1969                                               struct iwl_rx_cmd_buffer *rxb)
1970 {
1971         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1972         struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1973 
1974         mvm->scan_start = le64_to_cpu(notif->start_tsf);
1975 
1976         IWL_DEBUG_SCAN(mvm,
1977                        "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
1978                        notif->status, notif->scanned_channels);
1979 
1980         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1981                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1982                 ieee80211_sched_scan_results(mvm->hw);
1983                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1984         }
1985 
1986         IWL_DEBUG_SCAN(mvm,
1987                        "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
1988                        mvm->scan_start);
1989 }
1990 
1991 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1992 {
1993         struct iwl_umac_scan_abort cmd = {};
1994         int uid, ret;
1995 
1996         lockdep_assert_held(&mvm->mutex);
1997 
1998         /* We should always get a valid index here, because we already
1999          * checked that this type of scan was running in the generic
2000          * code.
2001          */
2002         uid = iwl_mvm_scan_uid_by_status(mvm, type);
2003         if (WARN_ON_ONCE(uid < 0))
2004                 return uid;
2005 
2006         cmd.uid = cpu_to_le32(uid);
2007 
2008         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
2009 
2010         ret = iwl_mvm_send_cmd_pdu(mvm,
2011                                    iwl_cmd_id(SCAN_ABORT_UMAC,
2012                                               IWL_ALWAYS_LONG_GROUP, 0),
2013                                    0, sizeof(cmd), &cmd);
2014         if (!ret)
2015                 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
2016 
2017         return ret;
2018 }
2019 
2020 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
2021 {
2022         struct iwl_notification_wait wait_scan_done;
2023         static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
2024                                               SCAN_OFFLOAD_COMPLETE, };
2025         int ret;
2026 
2027         lockdep_assert_held(&mvm->mutex);
2028 
2029         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
2030                                    scan_done_notif,
2031                                    ARRAY_SIZE(scan_done_notif),
2032                                    NULL, NULL);
2033 
2034         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
2035 
2036         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2037                 ret = iwl_mvm_umac_scan_abort(mvm, type);
2038         else
2039                 ret = iwl_mvm_lmac_scan_abort(mvm);
2040 
2041         if (ret) {
2042                 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
2043                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
2044                 return ret;
2045         }
2046 
2047         return iwl_wait_notification(&mvm->notif_wait, &wait_scan_done,
2048                                      1 * HZ);
2049 }
2050 
2051 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
2052 {
2053         int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
2054         int tail_size;
2055 
2056         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
2057                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
2058         else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
2059                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
2060         else if (iwl_mvm_cdb_scan_api(mvm))
2061                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
2062 
2063         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2064                 if (iwl_mvm_is_scan_ext_chan_supported(mvm))
2065                         tail_size = sizeof(struct iwl_scan_req_umac_tail_v2);
2066                 else
2067                         tail_size = sizeof(struct iwl_scan_req_umac_tail_v1);
2068 
2069                 return base_size +
2070                         sizeof(struct iwl_scan_channel_cfg_umac) *
2071                                 mvm->fw->ucode_capa.n_scan_channels +
2072                         tail_size;
2073         }
2074         return sizeof(struct iwl_scan_req_lmac) +
2075                 sizeof(struct iwl_scan_channel_cfg_lmac) *
2076                 mvm->fw->ucode_capa.n_scan_channels +
2077                 sizeof(struct iwl_scan_probe_req_v1);
2078 }
2079 
2080 /*
2081  * This function is used in nic restart flow, to inform mac80211 about scans
2082  * that was aborted by restart flow or by an assert.
2083  */
2084 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
2085 {
2086         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2087                 int uid, i;
2088 
2089                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
2090                 if (uid >= 0) {
2091                         struct cfg80211_scan_info info = {
2092                                 .aborted = true,
2093                         };
2094 
2095                         ieee80211_scan_completed(mvm->hw, &info);
2096                         mvm->scan_uid_status[uid] = 0;
2097                 }
2098                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
2099                 if (uid >= 0 && !mvm->fw_restart) {
2100                         ieee80211_sched_scan_stopped(mvm->hw);
2101                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
2102                         mvm->scan_uid_status[uid] = 0;
2103                 }
2104 
2105                 /* We shouldn't have any UIDs still set.  Loop over all the
2106                  * UIDs to make sure there's nothing left there and warn if
2107                  * any is found.
2108                  */
2109                 for (i = 0; i < mvm->max_scans; i++) {
2110                         if (WARN_ONCE(mvm->scan_uid_status[i],
2111                                       "UMAC scan UID %d status was not cleaned\n",
2112                                       i))
2113                                 mvm->scan_uid_status[i] = 0;
2114                 }
2115         } else {
2116                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
2117                         struct cfg80211_scan_info info = {
2118                                 .aborted = true,
2119                         };
2120 
2121                         ieee80211_scan_completed(mvm->hw, &info);
2122                 }
2123 
2124                 /* Sched scan will be restarted by mac80211 in
2125                  * restart_hw, so do not report if FW is about to be
2126                  * restarted.
2127                  */
2128                 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
2129                     !mvm->fw_restart) {
2130                         ieee80211_sched_scan_stopped(mvm->hw);
2131                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
2132                 }
2133         }
2134 }
2135 
2136 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
2137 {
2138         int ret;
2139 
2140         if (!(mvm->scan_status & type))
2141                 return 0;
2142 
2143         if (iwl_mvm_is_radio_killed(mvm)) {
2144                 ret = 0;
2145                 goto out;
2146         }
2147 
2148         ret = iwl_mvm_scan_stop_wait(mvm, type);
2149         if (!ret)
2150                 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
2151 out:
2152         /* Clear the scan status so the next scan requests will
2153          * succeed and mark the scan as stopping, so that the Rx
2154          * handler doesn't do anything, as the scan was stopped from
2155          * above.
2156          */
2157         mvm->scan_status &= ~type;
2158 
2159         if (type == IWL_MVM_SCAN_REGULAR) {
2160                 cancel_delayed_work(&mvm->scan_timeout_dwork);
2161                 if (notify) {
2162                         struct cfg80211_scan_info info = {
2163                                 .aborted = true,
2164                         };
2165 
2166                         ieee80211_scan_completed(mvm->hw, &info);
2167                 }
2168         } else if (notify) {
2169                 ieee80211_sched_scan_stopped(mvm->hw);
2170                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
2171         }
2172 
2173         return ret;
2174 }

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