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

   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  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of version 2 of the GNU General Public License as
  14  * published by the Free Software Foundation.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  24  * USA
  25  *
  26  * The full GNU General Public License is included in this distribution
  27  * in the file called COPYING.
  28  *
  29  * Contact Information:
  30  *  Intel Linux Wireless <linuxwifi@intel.com>
  31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  32  *
  33  * BSD LICENSE
  34  *
  35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
  36  * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH
  37  * Copyright(c) 2016 - 2017 Intel Deutschland GmbH
  38  * Copyright(c) 2018 Intel Corporation
  39  * All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms, with or without
  42  * modification, are permitted provided that the following conditions
  43  * are met:
  44  *
  45  *  * Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  *  * Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in
  49  *    the documentation and/or other materials provided with the
  50  *    distribution.
  51  *  * Neither the name Intel Corporation nor the names of its
  52  *    contributors may be used to endorse or promote products derived
  53  *    from this software without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  56  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  57  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  58  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  59  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  60  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  61  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  62  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  63  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  64  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  65  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  66  *
  67  *****************************************************************************/
  68
  69 #include <linux/etherdevice.h>
  70 #include <net/mac80211.h>
  71
  72 #include "mvm.h"
  73 #include "fw/api/scan.h"
  74 #include "iwl-io.h"
  75
  76 #define IWL_DENSE_EBS_SCAN_RATIO 5
  77 #define IWL_SPARSE_EBS_SCAN_RATIO 1
  78
  79 enum iwl_mvm_traffic_load {
  80         IWL_MVM_TRAFFIC_LOW,
  81         IWL_MVM_TRAFFIC_MEDIUM,
  82         IWL_MVM_TRAFFIC_HIGH,
  83 };
  84
  85 #define IWL_SCAN_DWELL_ACTIVE           10
  86 #define IWL_SCAN_DWELL_PASSIVE          110
  87 #define IWL_SCAN_DWELL_FRAGMENTED       44
  88 #define IWL_SCAN_DWELL_EXTENDED         90
  89 #define IWL_SCAN_NUM_OF_FRAGS           3
  90
  91
  92 /* adaptive dwell max budget time [TU] for full scan */
  93 #define IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN 300
  94 /* adaptive dwell max budget time [TU] for directed scan */
  95 #define IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN 100
  96 /* adaptive dwell default APs number */
  97 #define IWL_SCAN_ADWELL_DEFAULT_N_APS 2
  98 /* adaptive dwell default APs number in social channels (1, 6, 11) */
  99 #define IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL 10
 100
 101 struct iwl_mvm_scan_timing_params {
 102         u32 suspend_time;
 103         u32 max_out_time;
 104 };
 105
 106 static struct iwl_mvm_scan_timing_params scan_timing[] = {
 107         [IWL_SCAN_TYPE_UNASSOC] = {
 108                 .suspend_time = 0,
 109                 .max_out_time = 0,
 110         },
 111         [IWL_SCAN_TYPE_WILD] = {
 112                 .suspend_time = 30,
 113                 .max_out_time = 120,
 114         },
 115         [IWL_SCAN_TYPE_MILD] = {
 116                 .suspend_time = 120,
 117                 .max_out_time = 120,
 118         },
 119         [IWL_SCAN_TYPE_FRAGMENTED] = {
 120                 .suspend_time = 95,
 121                 .max_out_time = 44,
 122         },
 123 };
 124
 125 struct iwl_mvm_scan_params {
 126         enum iwl_mvm_scan_type type;
 127         u32 n_channels;
 128         u16 delay;
 129         int n_ssids;
 130         struct cfg80211_ssid *ssids;
 131         struct ieee80211_channel **channels;
 132         u32 flags;
 133         u8 *mac_addr;
 134         u8 *mac_addr_mask;
 135         bool no_cck;
 136         bool pass_all;
 137         int n_match_sets;
 138         struct iwl_scan_probe_req preq;
 139         struct cfg80211_match_set *match_sets;
 140         int n_scan_plans;
 141         struct cfg80211_sched_scan_plan *scan_plans;
 142         u32 measurement_dwell;
 143 };
 144
 145 static inline void *iwl_mvm_get_scan_req_umac_data(struct iwl_mvm *mvm)
 146 {
 147         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
 148
 149         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
 150                 return (void *)&cmd->v8.data;
 151
 152         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
 153                 return (void *)&cmd->v7.data;
 154
 155         if (iwl_mvm_has_new_tx_api(mvm))
 156                 return (void *)&cmd->v6.data;
 157
 158         return (void *)&cmd->v1.data;
 159 }
 160
 161 static inline struct iwl_scan_umac_chan_param *
 162 iwl_mvm_get_scan_req_umac_channel(struct iwl_mvm *mvm)
 163 {
 164         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
 165
 166         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
 167                 return &cmd->v8.channel;
 168
 169         if (iwl_mvm_is_adaptive_dwell_supported(mvm))
 170                 return &cmd->v7.channel;
 171
 172         if (iwl_mvm_has_new_tx_api(mvm))
 173                 return &cmd->v6.channel;
 174
 175         return &cmd->v1.channel;
 176 }
 177
 178 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
 179 {
 180         if (mvm->scan_rx_ant != ANT_NONE)
 181                 return mvm->scan_rx_ant;
 182         return iwl_mvm_get_valid_rx_ant(mvm);
 183 }
 184
 185 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 186 {
 187         u16 rx_chain;
 188         u8 rx_ant;
 189
 190         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 191         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 192         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 193         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 194         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 195         return cpu_to_le16(rx_chain);
 196 }
 197
 198 static __le32 iwl_mvm_scan_rxon_flags(enum nl80211_band band)
 199 {
 200         if (band == NL80211_BAND_2GHZ)
 201                 return cpu_to_le32(PHY_BAND_24);
 202         else
 203                 return cpu_to_le32(PHY_BAND_5);
 204 }
 205
 206 static inline __le32
 207 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum nl80211_band band,
 208                           bool no_cck)
 209 {
 210         u32 tx_ant;
 211
 212         mvm->scan_last_antenna_idx =
 213                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 214                                      mvm->scan_last_antenna_idx);
 215         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 216
 217         if (band == NL80211_BAND_2GHZ && !no_cck)
 218                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 219                                    tx_ant);
 220         else
 221                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 222 }
 223
 224 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 225                                             struct ieee80211_vif *vif)
 226 {
 227         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 228         int *global_cnt = data;
 229
 230         if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 231             mvmvif->phy_ctxt->id < NUM_PHY_CTX)
 232                 *global_cnt += 1;
 233 }
 234
 235 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm)
 236 {
 237         return IWL_MVM_TRAFFIC_LOW;
 238 }
 239
 240 static enum
 241 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device)
 242 {
 243         int global_cnt = 0;
 244         enum iwl_mvm_traffic_load load;
 245         bool low_latency;
 246
 247         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 248                                             IEEE80211_IFACE_ITER_NORMAL,
 249                                             iwl_mvm_scan_condition_iterator,
 250                                             &global_cnt);
 251         if (!global_cnt)
 252                 return IWL_SCAN_TYPE_UNASSOC;
 253
 254         load = iwl_mvm_get_traffic_load(mvm);
 255         low_latency = iwl_mvm_low_latency(mvm);
 256
 257         if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device &&
 258             fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN))
 259                 return IWL_SCAN_TYPE_FRAGMENTED;
 260
 261         if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency)
 262                 return IWL_SCAN_TYPE_MILD;
 263
 264         return IWL_SCAN_TYPE_WILD;
 265 }
 266
 267 static int
 268 iwl_mvm_get_measurement_dwell(struct iwl_mvm *mvm,
 269                               struct cfg80211_scan_request *req,
 270                               struct iwl_mvm_scan_params *params)
 271 {
 272         if (!req->duration)
 273                 return 0;
 274
 275         if (req->duration_mandatory &&
 276             req->duration > scan_timing[params->type].max_out_time) {
 277                 IWL_DEBUG_SCAN(mvm,
 278                                "Measurement scan - too long dwell %hu (max out time %u)\n",
 279                                req->duration,
 280                                scan_timing[params->type].max_out_time);
 281                 return -EOPNOTSUPP;
 282         }
 283
 284         return min_t(u32, (u32)req->duration,
 285                      scan_timing[params->type].max_out_time);
 286 }
 287
 288 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 289 {
 290         /* require rrm scan whenever the fw supports it */
 291         return fw_has_capa(&mvm->fw->ucode_capa,
 292                            IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT);
 293 }
 294
 295 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm)
 296 {
 297         int max_probe_len;
 298
 299         max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 300
 301         /* we create the 802.11 header and SSID element */
 302         max_probe_len -= 24 + 2;
 303
 304         /* DS parameter set element is added on 2.4GHZ band if required */
 305         if (iwl_mvm_rrm_scan_needed(mvm))
 306                 max_probe_len -= 3;
 307
 308         return max_probe_len;
 309 }
 310
 311 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
 312 {
 313         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm);
 314
 315         /* TODO: [BUG] This function should return the maximum allowed size of
 316          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 317          * in the same command. So the correct implementation of this function
 318          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 319          * command has only 512 bytes and it would leave us with about 240
 320          * bytes for scan IEs, which is clearly not enough. So meanwhile
 321          * we will report an incorrect value. This may result in a failure to
 322          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 323          * functions with -ENOBUFS, if a large enough probe will be provided.
 324          */
 325         return max_ie_len;
 326 }
 327
 328 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm,
 329                                               struct iwl_rx_cmd_buffer *rxb)
 330 {
 331         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 332         struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data;
 333
 334         IWL_DEBUG_SCAN(mvm,
 335                        "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
 336                        notif->status, notif->scanned_channels);
 337
 338         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
 339                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
 340                 ieee80211_sched_scan_results(mvm->hw);
 341                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 342         }
 343 }
 344
 345 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm,
 346                                  struct iwl_rx_cmd_buffer *rxb)
 347 {
 348         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 349         ieee80211_sched_scan_results(mvm->hw);
 350 }
 351
 352 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status)
 353 {
 354         switch (status) {
 355         case IWL_SCAN_EBS_SUCCESS:
 356                 return "successful";
 357         case IWL_SCAN_EBS_INACTIVE:
 358                 return "inactive";
 359         case IWL_SCAN_EBS_FAILED:
 360         case IWL_SCAN_EBS_CHAN_NOT_FOUND:
 361         default:
 362                 return "failed";
 363         }
 364 }
 365
 366 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm,
 367                                          struct iwl_rx_cmd_buffer *rxb)
 368 {
 369         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 370         struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data;
 371         bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED);
 372
 373         /* If this happens, the firmware has mistakenly sent an LMAC
 374          * notification during UMAC scans -- warn and ignore it.
 375          */
 376         if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa,
 377                                      IWL_UCODE_TLV_CAPA_UMAC_SCAN)))
 378                 return;
 379
 380         /* scan status must be locked for proper checking */
 381         lockdep_assert_held(&mvm->mutex);
 382
 383         /* We first check if we were stopping a scan, in which case we
 384          * just clear the stopping flag.  Then we check if it was a
 385          * firmware initiated stop, in which case we need to inform
 386          * mac80211.
 387          * Note that we can have a stopping and a running scan
 388          * simultaneously, but we can't have two different types of
 389          * scans stopping or running at the same time (since LMAC
 390          * doesn't support it).
 391          */
 392
 393         if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) {
 394                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR);
 395
 396                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 397                                aborted ? "aborted" : "completed",
 398                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 399                 IWL_DEBUG_SCAN(mvm,
 400                                "Last line %d, Last iteration %d, Time after last iteration %d\n",
 401                                scan_notif->last_schedule_line,
 402                                scan_notif->last_schedule_iteration,
 403                                __le32_to_cpu(scan_notif->time_after_last_iter));
 404
 405                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED;
 406         } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) {
 407                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n",
 408                                aborted ? "aborted" : "completed",
 409                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 410
 411                 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR;
 412         } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) {
 413                 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR);
 414
 415                 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n",
 416                                aborted ? "aborted" : "completed",
 417                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 418                 IWL_DEBUG_SCAN(mvm,
 419                                "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n",
 420                                scan_notif->last_schedule_line,
 421                                scan_notif->last_schedule_iteration,
 422                                __le32_to_cpu(scan_notif->time_after_last_iter));
 423
 424                 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED;
 425                 ieee80211_sched_scan_stopped(mvm->hw);
 426                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 427         } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
 428                 struct cfg80211_scan_info info = {
 429                         .aborted = aborted,
 430                 };
 431
 432                 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n",
 433                                aborted ? "aborted" : "completed",
 434                                iwl_mvm_ebs_status_str(scan_notif->ebs_status));
 435
 436                 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR;
 437                 ieee80211_scan_completed(mvm->hw, &info);
 438                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 439                 cancel_delayed_work(&mvm->scan_timeout_dwork);
 440         } else {
 441                 IWL_ERR(mvm,
 442                         "got scan complete notification but no scan is running\n");
 443         }
 444
 445         mvm->last_ebs_successful =
 446                         scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS ||
 447                         scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE;
 448 }
 449
 450 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 451 {
 452         int i;
 453
 454         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 455                 if (!ssid_list[i].len)
 456                         break;
 457                 if (ssid_list[i].len == ssid_len &&
 458                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 459                         return i;
 460         }
 461         return -1;
 462 }
 463
 464 /* We insert the SSIDs in an inverted order, because the FW will
 465  * invert it back.
 466  */
 467 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params,
 468                                  struct iwl_ssid_ie *ssids,
 469                                  u32 *ssid_bitmap)
 470 {
 471         int i, j;
 472         int index;
 473
 474         /*
 475          * copy SSIDs from match list.
 476          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 477          * config match list.
 478          */
 479         for (i = 0, j = params->n_match_sets - 1;
 480              j >= 0 && i < PROBE_OPTION_MAX;
 481              i++, j--) {
 482                 /* skip empty SSID matchsets */
 483                 if (!params->match_sets[j].ssid.ssid_len)
 484                         continue;
 485                 ssids[i].id = WLAN_EID_SSID;
 486                 ssids[i].len = params->match_sets[j].ssid.ssid_len;
 487                 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid,
 488                        ssids[i].len);
 489         }
 490
 491         /* add SSIDs from scan SSID list */
 492         *ssid_bitmap = 0;
 493         for (j = params->n_ssids - 1;
 494              j >= 0 && i < PROBE_OPTION_MAX;
 495              i++, j--) {
 496                 index = iwl_ssid_exist(params->ssids[j].ssid,
 497                                        params->ssids[j].ssid_len,
 498                                        ssids);
 499                 if (index < 0) {
 500                         ssids[i].id = WLAN_EID_SSID;
 501                         ssids[i].len = params->ssids[j].ssid_len;
 502                         memcpy(ssids[i].ssid, params->ssids[j].ssid,
 503                                ssids[i].len);
 504                         *ssid_bitmap |= BIT(i);
 505                 } else {
 506                         *ssid_bitmap |= BIT(index);
 507                 }
 508         }
 509 }
 510
 511 static int
 512 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 513                                    struct cfg80211_sched_scan_request *req)
 514 {
 515         struct iwl_scan_offload_profile *profile;
 516         struct iwl_scan_offload_profile_cfg *profile_cfg;
 517         struct iwl_scan_offload_blacklist *blacklist;
 518         struct iwl_host_cmd cmd = {
 519                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 520                 .len[1] = sizeof(*profile_cfg),
 521                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 522                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 523         };
 524         int blacklist_len;
 525         int i;
 526         int ret;
 527
 528         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 529                 return -EIO;
 530
 531         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 532                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 533         else
 534                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 535
 536         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 537         if (!blacklist)
 538                 return -ENOMEM;
 539
 540         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 541         if (!profile_cfg) {
 542                 ret = -ENOMEM;
 543                 goto free_blacklist;
 544         }
 545
 546         cmd.data[0] = blacklist;
 547         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 548         cmd.data[1] = profile_cfg;
 549
 550         /* No blacklist configuration */
 551
 552         profile_cfg->num_profiles = req->n_match_sets;
 553         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 554         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 555         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 556         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 557                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 558
 559         for (i = 0; i < req->n_match_sets; i++) {
 560                 profile = &profile_cfg->profiles[i];
 561                 profile->ssid_index = i;
 562                 /* Support any cipher and auth algorithm */
 563                 profile->unicast_cipher = 0xff;
 564                 profile->auth_alg = 0xff;
 565                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 566                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 567                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 568         }
 569
 570         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 571
 572         ret = iwl_mvm_send_cmd(mvm, &cmd);
 573         kfree(profile_cfg);
 574 free_blacklist:
 575         kfree(blacklist);
 576
 577         return ret;
 578 }
 579
 580 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
 581                                   struct cfg80211_sched_scan_request *req)
 582 {
 583         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 584                 IWL_DEBUG_SCAN(mvm,
 585                                "Sending scheduled scan with filtering, n_match_sets %d\n",
 586                                req->n_match_sets);
 587                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
 588                 return false;
 589         }
 590
 591         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
 592
 593         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
 594         return true;
 595 }
 596
 597 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm)
 598 {
 599         int ret;
 600         struct iwl_host_cmd cmd = {
 601                 .id = SCAN_OFFLOAD_ABORT_CMD,
 602         };
 603         u32 status = CAN_ABORT_STATUS;
 604
 605         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
 606         if (ret)
 607                 return ret;
 608
 609         if (status != CAN_ABORT_STATUS) {
 610                 /*
 611                  * The scan abort will return 1 for success or
 612                  * 2 for "failure".  A failure condition can be
 613                  * due to simply not being in an active scan which
 614                  * can occur if we send the scan abort before the
 615                  * microcode has notified us that a scan is completed.
 616                  */
 617                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
 618                 ret = -ENOENT;
 619         }
 620
 621         return ret;
 622 }
 623
 624 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm,
 625                                      struct iwl_scan_req_tx_cmd *tx_cmd,
 626                                      bool no_cck)
 627 {
 628         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 629                                          TX_CMD_FLG_BT_DIS);
 630         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 631                                                            NL80211_BAND_2GHZ,
 632                                                            no_cck);
 633         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
 634
 635         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 636                                          TX_CMD_FLG_BT_DIS);
 637         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
 638                                                            NL80211_BAND_5GHZ,
 639                                                            no_cck);
 640         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
 641 }
 642
 643 static void
 644 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
 645                                struct ieee80211_channel **channels,
 646                                int n_channels, u32 ssid_bitmap,
 647                                struct iwl_scan_req_lmac *cmd)
 648 {
 649         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
 650         int i;
 651
 652         for (i = 0; i < n_channels; i++) {
 653                 channel_cfg[i].channel_num =
 654                         cpu_to_le16(channels[i]->hw_value);
 655                 channel_cfg[i].iter_count = cpu_to_le16(1);
 656                 channel_cfg[i].iter_interval = 0;
 657                 channel_cfg[i].flags =
 658                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
 659                                     ssid_bitmap);
 660         }
 661 }
 662
 663 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
 664                                            size_t len, u8 *const pos)
 665 {
 666         static const u8 before_ds_params[] = {
 667                         WLAN_EID_SSID,
 668                         WLAN_EID_SUPP_RATES,
 669                         WLAN_EID_REQUEST,
 670                         WLAN_EID_EXT_SUPP_RATES,
 671         };
 672         size_t offs;
 673         u8 *newpos = pos;
 674
 675         if (!iwl_mvm_rrm_scan_needed(mvm)) {
 676                 memcpy(newpos, ies, len);
 677                 return newpos + len;
 678         }
 679
 680         offs = ieee80211_ie_split(ies, len,
 681                                   before_ds_params,
 682                                   ARRAY_SIZE(before_ds_params),
 683                                   0);
 684
 685         memcpy(newpos, ies, offs);
 686         newpos += offs;
 687
 688         /* Add a placeholder for DS Parameter Set element */
 689         *newpos++ = WLAN_EID_DS_PARAMS;
 690         *newpos++ = 1;
 691         *newpos++ = 0;
 692
 693         memcpy(newpos, ies + offs, len - offs);
 694         newpos += len - offs;
 695
 696         return newpos;
 697 }
 698
 699 #define WFA_TPC_IE_LEN  9
 700
 701 static void iwl_mvm_add_tpc_report_ie(u8 *pos)
 702 {
 703         pos[0] = WLAN_EID_VENDOR_SPECIFIC;
 704         pos[1] = WFA_TPC_IE_LEN - 2;
 705         pos[2] = (WLAN_OUI_MICROSOFT >> 16) & 0xff;
 706         pos[3] = (WLAN_OUI_MICROSOFT >> 8) & 0xff;
 707         pos[4] = WLAN_OUI_MICROSOFT & 0xff;
 708         pos[5] = WLAN_OUI_TYPE_MICROSOFT_TPC;
 709         pos[6] = 0;
 710         /* pos[7] - tx power will be inserted by the FW */
 711         pos[7] = 0;
 712         pos[8] = 0;
 713 }
 714
 715 static void
 716 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 717                          struct ieee80211_scan_ies *ies,
 718                          struct iwl_mvm_scan_params *params)
 719 {
 720         struct ieee80211_mgmt *frame = (void *)params->preq.buf;
 721         u8 *pos, *newpos;
 722         const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
 723                 params->mac_addr : NULL;
 724
 725         /*
 726          * Unfortunately, right now the offload scan doesn't support randomising
 727          * within the firmware, so until the firmware API is ready we implement
 728          * it in the driver. This means that the scan iterations won't really be
 729          * random, only when it's restarted, but at least that helps a bit.
 730          */
 731         if (mac_addr)
 732                 get_random_mask_addr(frame->sa, mac_addr,
 733                                      params->mac_addr_mask);
 734         else
 735                 memcpy(frame->sa, vif->addr, ETH_ALEN);
 736
 737         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 738         eth_broadcast_addr(frame->da);
 739         eth_broadcast_addr(frame->bssid);
 740         frame->seq_ctrl = 0;
 741
 742         pos = frame->u.probe_req.variable;
 743         *pos++ = WLAN_EID_SSID;
 744         *pos++ = 0;
 745
 746         params->preq.mac_header.offset = 0;
 747         params->preq.mac_header.len = cpu_to_le16(24 + 2);
 748
 749         /* Insert ds parameter set element on 2.4 GHz band */
 750         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
 751                                                  ies->ies[NL80211_BAND_2GHZ],
 752                                                  ies->len[NL80211_BAND_2GHZ],
 753                                                  pos);
 754         params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf);
 755         params->preq.band_data[0].len = cpu_to_le16(newpos - pos);
 756         pos = newpos;
 757
 758         memcpy(pos, ies->ies[NL80211_BAND_5GHZ],
 759                ies->len[NL80211_BAND_5GHZ]);
 760         params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf);
 761         params->preq.band_data[1].len =
 762                 cpu_to_le16(ies->len[NL80211_BAND_5GHZ]);
 763         pos += ies->len[NL80211_BAND_5GHZ];
 764
 765         memcpy(pos, ies->common_ies, ies->common_ie_len);
 766         params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf);
 767
 768         if (iwl_mvm_rrm_scan_needed(mvm) &&
 769             !fw_has_capa(&mvm->fw->ucode_capa,
 770                          IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)) {
 771                 iwl_mvm_add_tpc_report_ie(pos + ies->common_ie_len);
 772                 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len +
 773                                                            WFA_TPC_IE_LEN);
 774         } else {
 775                 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len);
 776         }
 777 }
 778
 779 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm,
 780                                     struct iwl_scan_req_lmac *cmd,
 781                                     struct iwl_mvm_scan_params *params)
 782 {
 783         cmd->active_dwell = IWL_SCAN_DWELL_ACTIVE;
 784         cmd->passive_dwell = IWL_SCAN_DWELL_PASSIVE;
 785         cmd->fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
 786         cmd->extended_dwell = IWL_SCAN_DWELL_EXTENDED;
 787         cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time);
 788         cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time);
 789         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
 790 }
 791
 792 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids,
 793                                      struct ieee80211_scan_ies *ies,
 794                                      int n_channels)
 795 {
 796         return ((n_ssids <= PROBE_OPTION_MAX) &&
 797                 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) &
 798                 (ies->common_ie_len +
 799                  ies->len[NL80211_BAND_2GHZ] +
 800                  ies->len[NL80211_BAND_5GHZ] <=
 801                  iwl_mvm_max_scan_ie_fw_cmd_room(mvm)));
 802 }
 803
 804 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm,
 805                                         struct ieee80211_vif *vif)
 806 {
 807         const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa;
 808
 809         /* We can only use EBS if:
 810          *      1. the feature is supported;
 811          *      2. the last EBS was successful;
 812          *      3. if only single scan, the single scan EBS API is supported;
 813          *      4. it's not a p2p find operation.
 814          */
 815         return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) &&
 816                 mvm->last_ebs_successful && IWL_MVM_ENABLE_EBS &&
 817                 vif->type != NL80211_IFTYPE_P2P_DEVICE);
 818 }
 819
 820 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params)
 821 {
 822         return params->n_scan_plans == 1 &&
 823                 params->scan_plans[0].iterations == 1;
 824 }
 825
 826 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm,
 827                                    struct iwl_mvm_scan_params *params,
 828                                    struct ieee80211_vif *vif)
 829 {
 830         int flags = 0;
 831
 832         if (params->n_ssids == 0)
 833                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
 834
 835         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
 836                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
 837
 838         if (params->type == IWL_SCAN_TYPE_FRAGMENTED)
 839                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
 840
 841         if (iwl_mvm_rrm_scan_needed(mvm) &&
 842             fw_has_capa(&mvm->fw->ucode_capa,
 843                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
 844                 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED;
 845
 846         if (params->pass_all)
 847                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
 848         else
 849                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
 850
 851 #ifdef CONFIG_IWLWIFI_DEBUGFS
 852         if (mvm->scan_iter_notif_enabled)
 853                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 854 #endif
 855
 856         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
 857                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
 858
 859         if (iwl_mvm_is_regular_scan(params) &&
 860             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
 861             params->type != IWL_SCAN_TYPE_FRAGMENTED)
 862                 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL;
 863
 864         return flags;
 865 }
 866
 867 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
 868                              struct iwl_mvm_scan_params *params)
 869 {
 870         struct iwl_scan_req_lmac *cmd = mvm->scan_cmd;
 871         struct iwl_scan_probe_req *preq =
 872                 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
 873                          mvm->fw->ucode_capa.n_scan_channels);
 874         u32 ssid_bitmap = 0;
 875         int i;
 876
 877         lockdep_assert_held(&mvm->mutex);
 878
 879         memset(cmd, 0, ksize(cmd));
 880
 881         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
 882                 return -EINVAL;
 883
 884         iwl_mvm_scan_lmac_dwell(mvm, cmd, params);
 885
 886         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
 887         cmd->iter_num = cpu_to_le32(1);
 888         cmd->n_channels = (u8)params->n_channels;
 889
 890         cmd->delay = cpu_to_le32(params->delay);
 891
 892         cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params,
 893                                                               vif));
 894
 895         cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band);
 896         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 897                                         MAC_FILTER_IN_BEACON);
 898         iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck);
 899         iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap);
 900
 901         /* this API uses bits 1-20 instead of 0-19 */
 902         ssid_bitmap <<= 1;
 903
 904         for (i = 0; i < params->n_scan_plans; i++) {
 905                 struct cfg80211_sched_scan_plan *scan_plan =
 906                         &params->scan_plans[i];
 907
 908                 cmd->schedule[i].delay =
 909                         cpu_to_le16(scan_plan->interval);
 910                 cmd->schedule[i].iterations = scan_plan->iterations;
 911                 cmd->schedule[i].full_scan_mul = 1;
 912         }
 913
 914         /*
 915          * If the number of iterations of the last scan plan is set to
 916          * zero, it should run infinitely. However, this is not always the case.
 917          * For example, when regular scan is requested the driver sets one scan
 918          * plan with one iteration.
 919          */
 920         if (!cmd->schedule[i - 1].iterations)
 921                 cmd->schedule[i - 1].iterations = 0xff;
 922
 923         if (iwl_mvm_scan_use_ebs(mvm, vif)) {
 924                 cmd->channel_opt[0].flags =
 925                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 926                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 927                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 928                 cmd->channel_opt[0].non_ebs_ratio =
 929                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
 930                 cmd->channel_opt[1].flags =
 931                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
 932                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
 933                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
 934                 cmd->channel_opt[1].non_ebs_ratio =
 935                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
 936         }
 937
 938         iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels,
 939                                        params->n_channels, ssid_bitmap, cmd);
 940
 941         *preq = params->preq;
 942
 943         return 0;
 944 }
 945
 946 static int rate_to_scan_rate_flag(unsigned int rate)
 947 {
 948         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
 949                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
 950                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
 951                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
 952                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
 953                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
 954                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
 955                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
 956                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
 957                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
 958                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
 959                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
 960                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
 961         };
 962
 963         return rate_to_scan_rate[rate];
 964 }
 965
 966 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
 967 {
 968         struct ieee80211_supported_band *band;
 969         unsigned int rates = 0;
 970         int i;
 971
 972         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
 973         for (i = 0; i < band->n_bitrates; i++)
 974                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 975         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
 976         for (i = 0; i < band->n_bitrates; i++)
 977                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
 978
 979         /* Set both basic rates and supported rates */
 980         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
 981
 982         return cpu_to_le32(rates);
 983 }
 984
 985 static void iwl_mvm_fill_scan_dwell(struct iwl_mvm *mvm,
 986                                     struct iwl_scan_dwell *dwell)
 987 {
 988         dwell->active = IWL_SCAN_DWELL_ACTIVE;
 989         dwell->passive = IWL_SCAN_DWELL_PASSIVE;
 990         dwell->fragmented = IWL_SCAN_DWELL_FRAGMENTED;
 991         dwell->extended = IWL_SCAN_DWELL_EXTENDED;
 992 }
 993
 994 static void iwl_mvm_fill_channels(struct iwl_mvm *mvm, u8 *channels)
 995 {
 996         struct ieee80211_supported_band *band;
 997         int i, j = 0;
 998
 999         band = &mvm->nvm_data->bands[NL80211_BAND_2GHZ];
1000         for (i = 0; i < band->n_channels; i++, j++)
1001                 channels[j] = band->channels[i].hw_value;
1002         band = &mvm->nvm_data->bands[NL80211_BAND_5GHZ];
1003         for (i = 0; i < band->n_channels; i++, j++)
1004                 channels[j] = band->channels[i].hw_value;
1005 }
1006
1007 static void iwl_mvm_fill_scan_config_v1(struct iwl_mvm *mvm, void *config,
1008                                         u32 flags, u8 channel_flags)
1009 {
1010         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
1011         struct iwl_scan_config_v1 *cfg = config;
1012
1013         cfg->flags = cpu_to_le32(flags);
1014         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1015         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1016         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1017         cfg->out_of_channel_time = cpu_to_le32(scan_timing[type].max_out_time);
1018         cfg->suspend_time = cpu_to_le32(scan_timing[type].suspend_time);
1019
1020         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1021
1022         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1023
1024         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1025         cfg->channel_flags = channel_flags;
1026
1027         iwl_mvm_fill_channels(mvm, cfg->channel_array);
1028 }
1029
1030 static void iwl_mvm_fill_scan_config(struct iwl_mvm *mvm, void *config,
1031                                      u32 flags, u8 channel_flags)
1032 {
1033         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
1034         struct iwl_scan_config *cfg = config;
1035
1036         cfg->flags = cpu_to_le32(flags);
1037         cfg->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1038         cfg->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1039         cfg->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1040         cfg->out_of_channel_time[0] =
1041                 cpu_to_le32(scan_timing[type].max_out_time);
1042         cfg->suspend_time[0] = cpu_to_le32(scan_timing[type].suspend_time);
1043
1044         if (iwl_mvm_is_cdb_supported(mvm)) {
1045                 cfg->suspend_time[1] =
1046                         cpu_to_le32(scan_timing[type].suspend_time);
1047                 cfg->out_of_channel_time[1] =
1048                         cpu_to_le32(scan_timing[type].max_out_time);
1049         }
1050
1051         iwl_mvm_fill_scan_dwell(mvm, &cfg->dwell);
1052
1053         memcpy(&cfg->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1054
1055         cfg->bcast_sta_id = mvm->aux_sta.sta_id;
1056         cfg->channel_flags = channel_flags;
1057
1058         iwl_mvm_fill_channels(mvm, cfg->channel_array);
1059 }
1060
1061 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1062 {
1063         void *cfg;
1064         int ret, cmd_size;
1065         struct iwl_host_cmd cmd = {
1066                 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0),
1067         };
1068         enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false);
1069         int num_channels =
1070                 mvm->nvm_data->bands[NL80211_BAND_2GHZ].n_channels +
1071                 mvm->nvm_data->bands[NL80211_BAND_5GHZ].n_channels;
1072         u32 flags;
1073         u8 channel_flags;
1074
1075         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1076                 return -ENOBUFS;
1077
1078         if (type == mvm->scan_type)
1079                 return 0;
1080
1081         if (iwl_mvm_has_new_tx_api(mvm))
1082                 cmd_size = sizeof(struct iwl_scan_config);
1083         else
1084                 cmd_size = sizeof(struct iwl_scan_config_v1);
1085         cmd_size += mvm->fw->ucode_capa.n_scan_channels;
1086
1087         cfg = kzalloc(cmd_size, GFP_KERNEL);
1088         if (!cfg)
1089                 return -ENOMEM;
1090
1091         flags = SCAN_CONFIG_FLAG_ACTIVATE |
1092                  SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1093                  SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1094                  SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1095                  SCAN_CONFIG_FLAG_SET_AUX_STA_ID |
1096                  SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1097                  SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1098                  SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1099                  SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS |
1100                  SCAN_CONFIG_N_CHANNELS(num_channels) |
1101                  (type == IWL_SCAN_TYPE_FRAGMENTED ?
1102                   SCAN_CONFIG_FLAG_SET_FRAGMENTED :
1103                   SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED);
1104
1105         channel_flags = IWL_CHANNEL_FLAG_EBS |
1106                         IWL_CHANNEL_FLAG_ACCURATE_EBS |
1107                         IWL_CHANNEL_FLAG_EBS_ADD |
1108                         IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1109
1110         if (iwl_mvm_has_new_tx_api(mvm)) {
1111                 flags |= (type == IWL_SCAN_TYPE_FRAGMENTED) ?
1112                          SCAN_CONFIG_FLAG_SET_LMAC2_FRAGMENTED :
1113                          SCAN_CONFIG_FLAG_CLEAR_LMAC2_FRAGMENTED;
1114                 iwl_mvm_fill_scan_config(mvm, cfg, flags, channel_flags);
1115         } else {
1116                 iwl_mvm_fill_scan_config_v1(mvm, cfg, flags, channel_flags);
1117         }
1118
1119         cmd.data[0] = cfg;
1120         cmd.len[0] = cmd_size;
1121         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1122
1123         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1124
1125         ret = iwl_mvm_send_cmd(mvm, &cmd);
1126         if (!ret)
1127                 mvm->scan_type = type;
1128
1129         kfree(cfg);
1130         return ret;
1131 }
1132
1133 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status)
1134 {
1135         int i;
1136
1137         for (i = 0; i < mvm->max_scans; i++)
1138                 if (mvm->scan_uid_status[i] == status)
1139                         return i;
1140
1141         return -ENOENT;
1142 }
1143
1144 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm,
1145                                     struct iwl_scan_req_umac *cmd,
1146                                     struct iwl_mvm_scan_params *params)
1147 {
1148         struct iwl_mvm_scan_timing_params *timing, *hb_timing;
1149         u8 active_dwell, passive_dwell;
1150
1151         timing = &scan_timing[params->type];
1152         active_dwell = params->measurement_dwell ?
1153                 params->measurement_dwell : IWL_SCAN_DWELL_ACTIVE;
1154         passive_dwell = params->measurement_dwell ?
1155                 params->measurement_dwell : IWL_SCAN_DWELL_PASSIVE;
1156
1157         if (iwl_mvm_is_adaptive_dwell_supported(mvm)) {
1158                 cmd->v7.adwell_default_n_aps_social =
1159                         IWL_SCAN_ADWELL_DEFAULT_N_APS_SOCIAL;
1160                 cmd->v7.adwell_default_n_aps =
1161                         IWL_SCAN_ADWELL_DEFAULT_N_APS;
1162
1163                 /* if custom max budget was configured with debugfs */
1164                 if (IWL_MVM_ADWELL_MAX_BUDGET)
1165                         cmd->v7.adwell_max_budget =
1166                                 cpu_to_le16(IWL_MVM_ADWELL_MAX_BUDGET);
1167                 else if (params->ssids && params->ssids[0].ssid_len)
1168                         cmd->v7.adwell_max_budget =
1169                                 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_DIRECTED_SCAN);
1170                 else
1171                         cmd->v7.adwell_max_budget =
1172                                 cpu_to_le16(IWL_SCAN_ADWELL_MAX_BUDGET_FULL_SCAN);
1173
1174                 cmd->v7.scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1175                 cmd->v7.max_out_time[SCAN_LB_LMAC_IDX] =
1176                         cpu_to_le32(timing->max_out_time);
1177                 cmd->v7.suspend_time[SCAN_LB_LMAC_IDX] =
1178                         cpu_to_le32(timing->suspend_time);
1179
1180                 if (iwl_mvm_is_cdb_supported(mvm)) {
1181                         hb_timing = &scan_timing[params->type];
1182
1183                         cmd->v7.max_out_time[SCAN_HB_LMAC_IDX] =
1184                                 cpu_to_le32(hb_timing->max_out_time);
1185                         cmd->v7.suspend_time[SCAN_HB_LMAC_IDX] =
1186                                 cpu_to_le32(hb_timing->suspend_time);
1187                 }
1188
1189                 if (!iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1190                         cmd->v7.active_dwell = active_dwell;
1191                         cmd->v7.passive_dwell = passive_dwell;
1192                         cmd->v7.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1193                 } else {
1194                         cmd->v8.active_dwell[SCAN_LB_LMAC_IDX] = active_dwell;
1195                         cmd->v8.passive_dwell[SCAN_LB_LMAC_IDX] = passive_dwell;
1196                         if (iwl_mvm_is_cdb_supported(mvm)) {
1197                                 cmd->v8.active_dwell[SCAN_HB_LMAC_IDX] =
1198                                         active_dwell;
1199                                 cmd->v8.passive_dwell[SCAN_HB_LMAC_IDX] =
1200                                         passive_dwell;
1201                         }
1202                 }
1203         } else {
1204                 cmd->v1.extended_dwell = params->measurement_dwell ?
1205                         params->measurement_dwell : IWL_SCAN_DWELL_EXTENDED;
1206                 cmd->v1.active_dwell = active_dwell;
1207                 cmd->v1.passive_dwell = passive_dwell;
1208                 cmd->v1.fragmented_dwell = IWL_SCAN_DWELL_FRAGMENTED;
1209
1210                 if (iwl_mvm_is_cdb_supported(mvm)) {
1211                         hb_timing = &scan_timing[params->type];
1212
1213                         cmd->v6.max_out_time[SCAN_HB_LMAC_IDX] =
1214                                         cpu_to_le32(hb_timing->max_out_time);
1215                         cmd->v6.suspend_time[SCAN_HB_LMAC_IDX] =
1216                                         cpu_to_le32(hb_timing->suspend_time);
1217                 }
1218
1219                 if (iwl_mvm_has_new_tx_api(mvm)) {
1220                         cmd->v6.scan_priority =
1221                                 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1222                         cmd->v6.max_out_time[SCAN_LB_LMAC_IDX] =
1223                                 cpu_to_le32(timing->max_out_time);
1224                         cmd->v6.suspend_time[SCAN_LB_LMAC_IDX] =
1225                                 cpu_to_le32(timing->suspend_time);
1226                 } else {
1227                         cmd->v1.scan_priority =
1228                                 cpu_to_le32(IWL_SCAN_PRIORITY_EXT_6);
1229                         cmd->v1.max_out_time =
1230                                 cpu_to_le32(timing->max_out_time);
1231                         cmd->v1.suspend_time =
1232                                 cpu_to_le32(timing->suspend_time);
1233                 }
1234         }
1235 }
1236
1237 static void
1238 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1239                                struct ieee80211_channel **channels,
1240                                int n_channels, u32 ssid_bitmap,
1241                                struct iwl_scan_channel_cfg_umac *channel_cfg)
1242 {
1243         int i;
1244
1245         for (i = 0; i < n_channels; i++) {
1246                 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1247                 channel_cfg[i].channel_num = channels[i]->hw_value;
1248                 channel_cfg[i].iter_count = 1;
1249                 channel_cfg[i].iter_interval = 0;
1250         }
1251 }
1252
1253 static u16 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm,
1254                                    struct iwl_mvm_scan_params *params,
1255                                    struct ieee80211_vif *vif)
1256 {
1257         u16 flags = 0;
1258
1259         if (params->n_ssids == 0)
1260                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1261
1262         if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0)
1263                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1264
1265         if (params->type == IWL_SCAN_TYPE_FRAGMENTED) {
1266                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1267                 if (iwl_mvm_is_cdb_supported(mvm))
1268                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED;
1269         }
1270
1271         if (iwl_mvm_rrm_scan_needed(mvm) &&
1272             fw_has_capa(&mvm->fw->ucode_capa,
1273                         IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
1274                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1275
1276         if (params->pass_all)
1277                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1278         else
1279                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1280
1281         if (!iwl_mvm_is_regular_scan(params))
1282                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1283
1284         if (params->measurement_dwell)
1285                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1286
1287 #ifdef CONFIG_IWLWIFI_DEBUGFS
1288         if (mvm->scan_iter_notif_enabled)
1289                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1290 #endif
1291
1292         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED)
1293                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE;
1294
1295         if (iwl_mvm_is_adaptive_dwell_supported(mvm) && IWL_MVM_ADWELL_ENABLE &&
1296             vif->type != NL80211_IFTYPE_P2P_DEVICE)
1297                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ADAPTIVE_DWELL;
1298
1299         /*
1300          * Extended dwell is relevant only for low band to start with, as it is
1301          * being used for social channles only (1, 6, 11), so we can check
1302          * only scan type on low band also for CDB.
1303          */
1304         if (iwl_mvm_is_regular_scan(params) &&
1305             vif->type != NL80211_IFTYPE_P2P_DEVICE &&
1306             params->type != IWL_SCAN_TYPE_FRAGMENTED &&
1307             !iwl_mvm_is_adaptive_dwell_supported(mvm) &&
1308             !iwl_mvm_is_oce_supported(mvm))
1309                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL;
1310
1311         if (iwl_mvm_is_oce_supported(mvm)) {
1312                 if ((params->flags &
1313                      NL80211_SCAN_FLAG_OCE_PROBE_REQ_HIGH_TX_RATE))
1314                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_HIGH_TX_RATE;
1315                 /* Since IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL and
1316                  * NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION shares
1317                  * the same bit, we need to make sure that we use this bit here
1318                  * only when IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL cannot be
1319                  * used. */
1320                 if ((params->flags &
1321                      NL80211_SCAN_FLAG_OCE_PROBE_REQ_DEFERRAL_SUPPRESSION) &&
1322                      !WARN_ON_ONCE(!iwl_mvm_is_adaptive_dwell_supported(mvm)))
1323                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PROB_REQ_DEFER_SUPP;
1324                 if ((params->flags & NL80211_SCAN_FLAG_FILS_MAX_CHANNEL_TIME))
1325                         flags |= IWL_UMAC_SCAN_GEN_FLAGS_MAX_CHNL_TIME;
1326         }
1327
1328         return flags;
1329 }
1330
1331 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1332                              struct iwl_mvm_scan_params *params,
1333                              int type)
1334 {
1335         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1336         struct iwl_scan_umac_chan_param *chan_param;
1337         void *cmd_data = iwl_mvm_get_scan_req_umac_data(mvm);
1338         struct iwl_scan_req_umac_tail *sec_part = cmd_data +
1339                 sizeof(struct iwl_scan_channel_cfg_umac) *
1340                         mvm->fw->ucode_capa.n_scan_channels;
1341         int uid, i;
1342         u32 ssid_bitmap = 0;
1343         u8 channel_flags = 0;
1344         u16 gen_flags;
1345         struct iwl_mvm_vif *scan_vif = iwl_mvm_vif_from_mac80211(vif);
1346
1347         chan_param = iwl_mvm_get_scan_req_umac_channel(mvm);
1348
1349         lockdep_assert_held(&mvm->mutex);
1350
1351         if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS))
1352                 return -EINVAL;
1353
1354         uid = iwl_mvm_scan_uid_by_status(mvm, 0);
1355         if (uid < 0)
1356                 return uid;
1357
1358         memset(cmd, 0, ksize(cmd));
1359
1360         iwl_mvm_scan_umac_dwell(mvm, cmd, params);
1361
1362         mvm->scan_uid_status[uid] = type;
1363
1364         cmd->uid = cpu_to_le32(uid);
1365         gen_flags = iwl_mvm_scan_umac_flags(mvm, params, vif);
1366         cmd->general_flags = cpu_to_le16(gen_flags);
1367         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm)) {
1368                 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED)
1369                         cmd->v8.num_of_fragments[SCAN_LB_LMAC_IDX] =
1370                                                         IWL_SCAN_NUM_OF_FRAGS;
1371                 if (gen_flags & IWL_UMAC_SCAN_GEN_FLAGS_LMAC2_FRAGMENTED)
1372                         cmd->v8.num_of_fragments[SCAN_HB_LMAC_IDX] =
1373                                                         IWL_SCAN_NUM_OF_FRAGS;
1374         }
1375
1376         cmd->scan_start_mac_id = scan_vif->id;
1377
1378         if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT)
1379                 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1380
1381         if (iwl_mvm_scan_use_ebs(mvm, vif))
1382                 channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1383                                 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1384                                 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1385
1386         chan_param->flags = channel_flags;
1387         chan_param->count = params->n_channels;
1388
1389         iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap);
1390
1391         iwl_mvm_umac_scan_cfg_channels(mvm, params->channels,
1392                                        params->n_channels, ssid_bitmap,
1393                                        cmd_data);
1394
1395         for (i = 0; i < params->n_scan_plans; i++) {
1396                 struct cfg80211_sched_scan_plan *scan_plan =
1397                         &params->scan_plans[i];
1398
1399                 sec_part->schedule[i].iter_count = scan_plan->iterations;
1400                 sec_part->schedule[i].interval =
1401                         cpu_to_le16(scan_plan->interval);
1402         }
1403
1404         /*
1405          * If the number of iterations of the last scan plan is set to
1406          * zero, it should run infinitely. However, this is not always the case.
1407          * For example, when regular scan is requested the driver sets one scan
1408          * plan with one iteration.
1409          */
1410         if (!sec_part->schedule[i - 1].iter_count)
1411                 sec_part->schedule[i - 1].iter_count = 0xff;
1412
1413         sec_part->delay = cpu_to_le16(params->delay);
1414         sec_part->preq = params->preq;
1415
1416         return 0;
1417 }
1418
1419 static int iwl_mvm_num_scans(struct iwl_mvm *mvm)
1420 {
1421         return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK);
1422 }
1423
1424 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type)
1425 {
1426         bool unified_image = fw_has_capa(&mvm->fw->ucode_capa,
1427                                          IWL_UCODE_TLV_CAPA_CNSLDTD_D3_D0_IMG);
1428
1429         /* This looks a bit arbitrary, but the idea is that if we run
1430          * out of possible simultaneous scans and the userspace is
1431          * trying to run a scan type that is already running, we
1432          * return -EBUSY.  But if the userspace wants to start a
1433          * different type of scan, we stop the opposite type to make
1434          * space for the new request.  The reason is backwards
1435          * compatibility with old wpa_supplicant that wouldn't stop a
1436          * scheduled scan before starting a normal scan.
1437          */
1438
1439         if (iwl_mvm_num_scans(mvm) < mvm->max_scans)
1440                 return 0;
1441
1442         /* Use a switch, even though this is a bitmask, so that more
1443          * than one bits set will fall in default and we will warn.
1444          */
1445         switch (type) {
1446         case IWL_MVM_SCAN_REGULAR:
1447                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1448                         return -EBUSY;
1449                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
1450         case IWL_MVM_SCAN_SCHED:
1451                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1452                         return -EBUSY;
1453                 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
1454         case IWL_MVM_SCAN_NETDETECT:
1455                 /* For non-unified images, there's no need to stop
1456                  * anything for net-detect since the firmware is
1457                  * restarted anyway.  This way, any sched scans that
1458                  * were running will be restarted when we resume.
1459                  */
1460                 if (!unified_image)
1461                         return 0;
1462
1463                 /* If this is a unified image and we ran out of scans,
1464                  * we need to stop something.  Prefer stopping regular
1465                  * scans, because the results are useless at this
1466                  * point, and we should be able to keep running
1467                  * another scheduled scan while suspended.
1468                  */
1469                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK)
1470                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR,
1471                                                  true);
1472                 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK)
1473                         return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED,
1474                                                  true);
1475
1476                 /* fall through, something is wrong if no scan was
1477                  * running but we ran out of scans.
1478                  */
1479         default:
1480                 WARN_ON(1);
1481                 break;
1482         }
1483
1484         return -EIO;
1485 }
1486
1487 #define SCAN_TIMEOUT 20000
1488
1489 void iwl_mvm_scan_timeout_wk(struct work_struct *work)
1490 {
1491         struct delayed_work *delayed_work = to_delayed_work(work);
1492         struct iwl_mvm *mvm = container_of(delayed_work, struct iwl_mvm,
1493                                            scan_timeout_dwork);
1494
1495         IWL_ERR(mvm, "regular scan timed out\n");
1496
1497         iwl_force_nmi(mvm->trans);
1498 }
1499
1500 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1501                            struct cfg80211_scan_request *req,
1502                            struct ieee80211_scan_ies *ies)
1503 {
1504         struct iwl_host_cmd hcmd = {
1505                 .len = { iwl_mvm_scan_size(mvm), },
1506                 .data = { mvm->scan_cmd, },
1507                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1508         };
1509         struct iwl_mvm_scan_params params = {};
1510         int ret;
1511         struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 };
1512
1513         lockdep_assert_held(&mvm->mutex);
1514
1515         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1516                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
1517                 return -EBUSY;
1518         }
1519
1520         ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR);
1521         if (ret)
1522                 return ret;
1523
1524         /* we should have failed registration if scan_cmd was NULL */
1525         if (WARN_ON(!mvm->scan_cmd))
1526                 return -ENOMEM;
1527
1528         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1529                 return -ENOBUFS;
1530
1531         params.n_ssids = req->n_ssids;
1532         params.flags = req->flags;
1533         params.n_channels = req->n_channels;
1534         params.delay = 0;
1535         params.ssids = req->ssids;
1536         params.channels = req->channels;
1537         params.mac_addr = req->mac_addr;
1538         params.mac_addr_mask = req->mac_addr_mask;
1539         params.no_cck = req->no_cck;
1540         params.pass_all = true;
1541         params.n_match_sets = 0;
1542         params.match_sets = NULL;
1543
1544         params.scan_plans = &scan_plan;
1545         params.n_scan_plans = 1;
1546
1547         params.type =
1548                 iwl_mvm_get_scan_type(mvm,
1549                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1550
1551         ret = iwl_mvm_get_measurement_dwell(mvm, req, &params);
1552         if (ret < 0)
1553                 return ret;
1554
1555         params.measurement_dwell = ret;
1556
1557         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1558
1559         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1560                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1561                 ret = iwl_mvm_scan_umac(mvm, vif, &params,
1562                                         IWL_MVM_SCAN_REGULAR);
1563         } else {
1564                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1565                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1566         }
1567
1568         if (ret)
1569                 return ret;
1570
1571         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1572         if (ret) {
1573                 /* If the scan failed, it usually means that the FW was unable
1574                  * to allocate the time events. Warn on it, but maybe we
1575                  * should try to send the command again with different params.
1576                  */
1577                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1578                 return ret;
1579         }
1580
1581         IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1582         mvm->scan_status |= IWL_MVM_SCAN_REGULAR;
1583         mvm->scan_vif = iwl_mvm_vif_from_mac80211(vif);
1584         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1585
1586         schedule_delayed_work(&mvm->scan_timeout_dwork,
1587                               msecs_to_jiffies(SCAN_TIMEOUT));
1588
1589         return 0;
1590 }
1591
1592 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1593                              struct ieee80211_vif *vif,
1594                              struct cfg80211_sched_scan_request *req,
1595                              struct ieee80211_scan_ies *ies,
1596                              int type)
1597 {
1598         struct iwl_host_cmd hcmd = {
1599                 .len = { iwl_mvm_scan_size(mvm), },
1600                 .data = { mvm->scan_cmd, },
1601                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1602         };
1603         struct iwl_mvm_scan_params params = {};
1604         int ret;
1605
1606         lockdep_assert_held(&mvm->mutex);
1607
1608         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
1609                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
1610                 return -EBUSY;
1611         }
1612
1613         ret = iwl_mvm_check_running_scans(mvm, type);
1614         if (ret)
1615                 return ret;
1616
1617         /* we should have failed registration if scan_cmd was NULL */
1618         if (WARN_ON(!mvm->scan_cmd))
1619                 return -ENOMEM;
1620
1621         if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels))
1622                 return -ENOBUFS;
1623
1624         params.n_ssids = req->n_ssids;
1625         params.flags = req->flags;
1626         params.n_channels = req->n_channels;
1627         params.ssids = req->ssids;
1628         params.channels = req->channels;
1629         params.mac_addr = req->mac_addr;
1630         params.mac_addr_mask = req->mac_addr_mask;
1631         params.no_cck = false;
1632         params.pass_all =  iwl_mvm_scan_pass_all(mvm, req);
1633         params.n_match_sets = req->n_match_sets;
1634         params.match_sets = req->match_sets;
1635         if (!req->n_scan_plans)
1636                 return -EINVAL;
1637
1638         params.n_scan_plans = req->n_scan_plans;
1639         params.scan_plans = req->scan_plans;
1640
1641         params.type =
1642                 iwl_mvm_get_scan_type(mvm,
1643                                       vif->type == NL80211_IFTYPE_P2P_DEVICE);
1644
1645         /* In theory, LMAC scans can handle a 32-bit delay, but since
1646          * waiting for over 18 hours to start the scan is a bit silly
1647          * and to keep it aligned with UMAC scans (which only support
1648          * 16-bit delays), trim it down to 16-bits.
1649          */
1650         if (req->delay > U16_MAX) {
1651                 IWL_DEBUG_SCAN(mvm,
1652                                "delay value is > 16-bits, set to max possible\n");
1653                 params.delay = U16_MAX;
1654         } else {
1655                 params.delay = req->delay;
1656         }
1657
1658         ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1659         if (ret)
1660                 return ret;
1661
1662         iwl_mvm_build_scan_probe(mvm, vif, ies, &params);
1663
1664         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1665                 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0);
1666                 ret = iwl_mvm_scan_umac(mvm, vif, &params, type);
1667         } else {
1668                 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD;
1669                 ret = iwl_mvm_scan_lmac(mvm, vif, &params);
1670         }
1671
1672         if (ret)
1673                 return ret;
1674
1675         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1676         if (!ret) {
1677                 IWL_DEBUG_SCAN(mvm,
1678                                "Sched scan request was sent successfully\n");
1679                 mvm->scan_status |= type;
1680         } else {
1681                 /* If the scan failed, it usually means that the FW was unable
1682                  * to allocate the time events. Warn on it, but maybe we
1683                  * should try to send the command again with different params.
1684                  */
1685                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1686         }
1687
1688         return ret;
1689 }
1690
1691 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
1692                                          struct iwl_rx_cmd_buffer *rxb)
1693 {
1694         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1695         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
1696         u32 uid = __le32_to_cpu(notif->uid);
1697         bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED);
1698
1699         if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status)))
1700                 return;
1701
1702         /* if the scan is already stopping, we don't need to notify mac80211 */
1703         if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) {
1704                 struct cfg80211_scan_info info = {
1705                         .aborted = aborted,
1706                         .scan_start_tsf = mvm->scan_start,
1707                 };
1708
1709                 memcpy(info.tsf_bssid, mvm->scan_vif->bssid, ETH_ALEN);
1710                 ieee80211_scan_completed(mvm->hw, &info);
1711                 mvm->scan_vif = NULL;
1712                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1713                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1714         } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) {
1715                 ieee80211_sched_scan_stopped(mvm->hw);
1716                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1717         }
1718
1719         mvm->scan_status &= ~mvm->scan_uid_status[uid];
1720         IWL_DEBUG_SCAN(mvm,
1721                        "Scan completed, uid %u type %u, status %s, EBS status %s\n",
1722                        uid, mvm->scan_uid_status[uid],
1723                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
1724                                 "completed" : "aborted",
1725                        iwl_mvm_ebs_status_str(notif->ebs_status));
1726         IWL_DEBUG_SCAN(mvm,
1727                        "Last line %d, Last iteration %d, Time from last iteration %d\n",
1728                        notif->last_schedule, notif->last_iter,
1729                        __le32_to_cpu(notif->time_from_last_iter));
1730
1731         if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS &&
1732             notif->ebs_status != IWL_SCAN_EBS_INACTIVE)
1733                 mvm->last_ebs_successful = false;
1734
1735         mvm->scan_uid_status[uid] = 0;
1736 }
1737
1738 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm,
1739                                               struct iwl_rx_cmd_buffer *rxb)
1740 {
1741         struct iwl_rx_packet *pkt = rxb_addr(rxb);
1742         struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data;
1743
1744         mvm->scan_start = le64_to_cpu(notif->start_tsf);
1745
1746         IWL_DEBUG_SCAN(mvm,
1747                        "UMAC Scan iteration complete: status=0x%x scanned_channels=%d\n",
1748                        notif->status, notif->scanned_channels);
1749
1750         if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) {
1751                 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n");
1752                 ieee80211_sched_scan_results(mvm->hw);
1753                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED;
1754         }
1755
1756         IWL_DEBUG_SCAN(mvm,
1757                        "UMAC Scan iteration complete: scan started at %llu (TSF)\n",
1758                        mvm->scan_start);
1759 }
1760
1761 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type)
1762 {
1763         struct iwl_umac_scan_abort cmd = {};
1764         int uid, ret;
1765
1766         lockdep_assert_held(&mvm->mutex);
1767
1768         /* We should always get a valid index here, because we already
1769          * checked that this type of scan was running in the generic
1770          * code.
1771          */
1772         uid = iwl_mvm_scan_uid_by_status(mvm, type);
1773         if (WARN_ON_ONCE(uid < 0))
1774                 return uid;
1775
1776         cmd.uid = cpu_to_le32(uid);
1777
1778         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
1779
1780         ret = iwl_mvm_send_cmd_pdu(mvm,
1781                                    iwl_cmd_id(SCAN_ABORT_UMAC,
1782                                               IWL_ALWAYS_LONG_GROUP, 0),
1783                                    0, sizeof(cmd), &cmd);
1784         if (!ret)
1785                 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT;
1786
1787         return ret;
1788 }
1789
1790 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type)
1791 {
1792         struct iwl_notification_wait wait_scan_done;
1793         static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC,
1794                                               SCAN_OFFLOAD_COMPLETE, };
1795         int ret;
1796
1797         lockdep_assert_held(&mvm->mutex);
1798
1799         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1800                                    scan_done_notif,
1801                                    ARRAY_SIZE(scan_done_notif),
1802                                    NULL, NULL);
1803
1804         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
1805
1806         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1807                 ret = iwl_mvm_umac_scan_abort(mvm, type);
1808         else
1809                 ret = iwl_mvm_lmac_scan_abort(mvm);
1810
1811         if (ret) {
1812                 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type);
1813                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1814                 return ret;
1815         }
1816
1817         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1818
1819         return ret;
1820 }
1821
1822 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
1823 {
1824         int base_size = IWL_SCAN_REQ_UMAC_SIZE_V1;
1825
1826         if (iwl_mvm_is_adaptive_dwell_v2_supported(mvm))
1827                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V8;
1828         else if (iwl_mvm_is_adaptive_dwell_supported(mvm))
1829                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V7;
1830         else if (iwl_mvm_has_new_tx_api(mvm))
1831                 base_size = IWL_SCAN_REQ_UMAC_SIZE_V6;
1832
1833         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1834                 return base_size +
1835                         sizeof(struct iwl_scan_channel_cfg_umac) *
1836                                 mvm->fw->ucode_capa.n_scan_channels +
1837                         sizeof(struct iwl_scan_req_umac_tail);
1838
1839         return sizeof(struct iwl_scan_req_lmac) +
1840                 sizeof(struct iwl_scan_channel_cfg_lmac) *
1841                 mvm->fw->ucode_capa.n_scan_channels +
1842                 sizeof(struct iwl_scan_probe_req);
1843 }
1844
1845 /*
1846  * This function is used in nic restart flow, to inform mac80211 about scans
1847  * that was aborted by restart flow or by an assert.
1848  */
1849 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm)
1850 {
1851         if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1852                 int uid, i;
1853
1854                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR);
1855                 if (uid >= 0) {
1856                         struct cfg80211_scan_info info = {
1857                                 .aborted = true,
1858                         };
1859
1860                         ieee80211_scan_completed(mvm->hw, &info);
1861                         mvm->scan_uid_status[uid] = 0;
1862                 }
1863                 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED);
1864                 if (uid >= 0 && !mvm->fw_restart) {
1865                         ieee80211_sched_scan_stopped(mvm->hw);
1866                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1867                         mvm->scan_uid_status[uid] = 0;
1868                 }
1869
1870                 /* We shouldn't have any UIDs still set.  Loop over all the
1871                  * UIDs to make sure there's nothing left there and warn if
1872                  * any is found.
1873                  */
1874                 for (i = 0; i < mvm->max_scans; i++) {
1875                         if (WARN_ONCE(mvm->scan_uid_status[i],
1876                                       "UMAC scan UID %d status was not cleaned\n",
1877                                       i))
1878                                 mvm->scan_uid_status[i] = 0;
1879                 }
1880         } else {
1881                 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) {
1882                         struct cfg80211_scan_info info = {
1883                                 .aborted = true,
1884                         };
1885
1886                         ieee80211_scan_completed(mvm->hw, &info);
1887                 }
1888
1889                 /* Sched scan will be restarted by mac80211 in
1890                  * restart_hw, so do not report if FW is about to be
1891                  * restarted.
1892                  */
1893                 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) &&
1894                     !mvm->fw_restart) {
1895                         ieee80211_sched_scan_stopped(mvm->hw);
1896                         mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1897                 }
1898         }
1899 }
1900
1901 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify)
1902 {
1903         int ret;
1904
1905         if (!(mvm->scan_status & type))
1906                 return 0;
1907
1908         if (iwl_mvm_is_radio_killed(mvm)) {
1909                 ret = 0;
1910                 goto out;
1911         }
1912
1913         ret = iwl_mvm_scan_stop_wait(mvm, type);
1914         if (!ret)
1915                 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT;
1916 out:
1917         /* Clear the scan status so the next scan requests will
1918          * succeed and mark the scan as stopping, so that the Rx
1919          * handler doesn't do anything, as the scan was stopped from
1920          * above.
1921          */
1922         mvm->scan_status &= ~type;
1923
1924         if (type == IWL_MVM_SCAN_REGULAR) {
1925                 /* Since the rx handler won't do anything now, we have
1926                  * to release the scan reference here.
1927                  */
1928                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1929                 cancel_delayed_work(&mvm->scan_timeout_dwork);
1930                 if (notify) {
1931                         struct cfg80211_scan_info info = {
1932                                 .aborted = true,
1933                         };
1934
1935                         ieee80211_scan_completed(mvm->hw, &info);
1936                 }
1937         } else if (notify) {
1938                 ieee80211_sched_scan_stopped(mvm->hw);
1939                 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED;
1940         }
1941
1942         return ret;
1943 }