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

   1 /******************************************************************************
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  64  *****************************************************************************/
  65
  66 #include <linux/etherdevice.h>
  67 #include <net/mac80211.h>
  68
  69 #include "mvm.h"
  70 #include "iwl-eeprom-parse.h"
  71 #include "fw-api-scan.h"
  72
  73 #define IWL_PLCP_QUIET_THRESH 1
  74 #define IWL_ACTIVE_QUIET_TIME 10
  75 #define IWL_DENSE_EBS_SCAN_RATIO 5
  76 #define IWL_SPARSE_EBS_SCAN_RATIO 1
  77
  78 struct iwl_mvm_scan_params {
  79         u32 max_out_time;
  80         u32 suspend_time;
  81         bool passive_fragmented;
  82         struct _dwell {
  83                 u16 passive;
  84                 u16 active;
  85         } dwell[IEEE80211_NUM_BANDS];
  86 };
  87
  88 enum iwl_umac_scan_uid_type {
  89         IWL_UMAC_SCAN_UID_REG_SCAN      = BIT(0),
  90         IWL_UMAC_SCAN_UID_SCHED_SCAN    = BIT(1),
  91         IWL_UMAC_SCAN_UID_ALL           = IWL_UMAC_SCAN_UID_REG_SCAN |
  92                                           IWL_UMAC_SCAN_UID_SCHED_SCAN,
  93 };
  94
  95 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
  96                               enum iwl_umac_scan_uid_type type, bool notify);
  97
  98 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm)
  99 {
 100         if (mvm->scan_rx_ant != ANT_NONE)
 101                 return mvm->scan_rx_ant;
 102         return iwl_mvm_get_valid_rx_ant(mvm);
 103 }
 104
 105 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
 106 {
 107         u16 rx_chain;
 108         u8 rx_ant;
 109
 110         rx_ant = iwl_mvm_scan_rx_ant(mvm);
 111         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
 112         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
 113         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
 114         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
 115         return cpu_to_le16(rx_chain);
 116 }
 117
 118 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
 119 {
 120         if (band == IEEE80211_BAND_2GHZ)
 121                 return cpu_to_le32(PHY_BAND_24);
 122         else
 123                 return cpu_to_le32(PHY_BAND_5);
 124 }
 125
 126 static inline __le32
 127 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
 128                           bool no_cck)
 129 {
 130         u32 tx_ant;
 131
 132         mvm->scan_last_antenna_idx =
 133                 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm),
 134                                      mvm->scan_last_antenna_idx);
 135         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 136
 137         if (band == IEEE80211_BAND_2GHZ && !no_cck)
 138                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 139                                    tx_ant);
 140         else
 141                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 142 }
 143
 144 /*
 145  * We insert the SSIDs in an inverted order, because the FW will
 146  * invert it back. The most prioritized SSID, which is first in the
 147  * request list, is not copied here, but inserted directly to the probe
 148  * request.
 149  */
 150 static void iwl_mvm_scan_fill_ssids(struct iwl_ssid_ie *cmd_ssid,
 151                                     struct cfg80211_ssid *ssids,
 152                                     int n_ssids, int first)
 153 {
 154         int fw_idx, req_idx;
 155
 156         for (req_idx = n_ssids - 1, fw_idx = 0; req_idx >= first;
 157              req_idx--, fw_idx++) {
 158                 cmd_ssid[fw_idx].id = WLAN_EID_SSID;
 159                 cmd_ssid[fw_idx].len = ssids[req_idx].ssid_len;
 160                 memcpy(cmd_ssid[fw_idx].ssid,
 161                        ssids[req_idx].ssid,
 162                        ssids[req_idx].ssid_len);
 163         }
 164 }
 165
 166 /*
 167  * If req->n_ssids > 0, it means we should do an active scan.
 168  * In case of active scan w/o directed scan, we receive a zero-length SSID
 169  * just to notify that this scan is active and not passive.
 170  * In order to notify the FW of the number of SSIDs we wish to scan (including
 171  * the zero-length one), we need to set the corresponding bits in chan->type,
 172  * one for each SSID, and set the active bit (first). If the first SSID is
 173  * already included in the probe template, so we need to set only
 174  * req->n_ssids - 1 bits in addition to the first bit.
 175  */
 176 static u16 iwl_mvm_get_active_dwell(struct iwl_mvm *mvm,
 177                                     enum ieee80211_band band, int n_ssids)
 178 {
 179         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
 180                 return 10;
 181         if (band == IEEE80211_BAND_2GHZ)
 182                 return 20  + 3 * (n_ssids + 1);
 183         return 10  + 2 * (n_ssids + 1);
 184 }
 185
 186 static u16 iwl_mvm_get_passive_dwell(struct iwl_mvm *mvm,
 187                                      enum ieee80211_band band)
 188 {
 189         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_BASIC_DWELL)
 190                         return 110;
 191         return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
 192 }
 193
 194 static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd,
 195                                        struct cfg80211_scan_request *req,
 196                                        bool basic_ssid,
 197                                        struct iwl_mvm_scan_params *params)
 198 {
 199         struct iwl_scan_channel *chan = (struct iwl_scan_channel *)
 200                 (cmd->data + le16_to_cpu(cmd->tx_cmd.len));
 201         int i;
 202         int type = BIT(req->n_ssids) - 1;
 203         enum ieee80211_band band = req->channels[0]->band;
 204
 205         if (!basic_ssid)
 206                 type |= BIT(req->n_ssids);
 207
 208         for (i = 0; i < cmd->channel_count; i++) {
 209                 chan->channel = cpu_to_le16(req->channels[i]->hw_value);
 210                 chan->type = cpu_to_le32(type);
 211                 if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR)
 212                         chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE);
 213                 chan->active_dwell = cpu_to_le16(params->dwell[band].active);
 214                 chan->passive_dwell = cpu_to_le16(params->dwell[band].passive);
 215                 chan->iteration_count = cpu_to_le16(1);
 216                 chan++;
 217         }
 218 }
 219
 220 /*
 221  * Fill in probe request with the following parameters:
 222  * TA is our vif HW address, which mac80211 ensures we have.
 223  * Packet is broadcasted, so this is both SA and DA.
 224  * The probe request IE is made out of two: first comes the most prioritized
 225  * SSID if a directed scan is requested. Second comes whatever extra
 226  * information was given to us as the scan request IE.
 227  */
 228 static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
 229                                   int n_ssids, const u8 *ssid, int ssid_len,
 230                                   const u8 *band_ie, int band_ie_len,
 231                                   const u8 *common_ie, int common_ie_len,
 232                                   int left)
 233 {
 234         int len = 0;
 235         u8 *pos = NULL;
 236
 237         /* Make sure there is enough space for the probe request,
 238          * two mandatory IEs and the data */
 239         left -= 24;
 240         if (left < 0)
 241                 return 0;
 242
 243         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 244         eth_broadcast_addr(frame->da);
 245         memcpy(frame->sa, ta, ETH_ALEN);
 246         eth_broadcast_addr(frame->bssid);
 247         frame->seq_ctrl = 0;
 248
 249         len += 24;
 250
 251         /* for passive scans, no need to fill anything */
 252         if (n_ssids == 0)
 253                 return (u16)len;
 254
 255         /* points to the payload of the request */
 256         pos = &frame->u.probe_req.variable[0];
 257
 258         /* fill in our SSID IE */
 259         left -= ssid_len + 2;
 260         if (left < 0)
 261                 return 0;
 262         *pos++ = WLAN_EID_SSID;
 263         *pos++ = ssid_len;
 264         if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */
 265                 memcpy(pos, ssid, ssid_len);
 266                 pos += ssid_len;
 267         }
 268
 269         len += ssid_len + 2;
 270
 271         if (WARN_ON(left < band_ie_len + common_ie_len))
 272                 return len;
 273
 274         if (band_ie && band_ie_len) {
 275                 memcpy(pos, band_ie, band_ie_len);
 276                 pos += band_ie_len;
 277                 len += band_ie_len;
 278         }
 279
 280         if (common_ie && common_ie_len) {
 281                 memcpy(pos, common_ie, common_ie_len);
 282                 pos += common_ie_len;
 283                 len += common_ie_len;
 284         }
 285
 286         return (u16)len;
 287 }
 288
 289 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 290                                             struct ieee80211_vif *vif)
 291 {
 292         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 293         int *global_cnt = data;
 294
 295         if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 296             mvmvif->phy_ctxt->id < MAX_PHYS)
 297                 *global_cnt += 1;
 298 }
 299
 300 static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
 301                                      struct ieee80211_vif *vif,
 302                                      int n_ssids, u32 flags,
 303                                      struct iwl_mvm_scan_params *params)
 304 {
 305         int global_cnt = 0;
 306         enum ieee80211_band band;
 307         u8 frag_passive_dwell = 0;
 308
 309         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 310                                             IEEE80211_IFACE_ITER_NORMAL,
 311                                             iwl_mvm_scan_condition_iterator,
 312                                             &global_cnt);
 313
 314         if (!global_cnt)
 315                 goto not_bound;
 316
 317         params->suspend_time = 30;
 318         params->max_out_time = 120;
 319
 320         if (iwl_mvm_low_latency(mvm)) {
 321                 if (mvm->fw->ucode_capa.api[0] &
 322                     IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
 323                         params->suspend_time = 105;
 324                         /*
 325                          * If there is more than one active interface make
 326                          * passive scan more fragmented.
 327                          */
 328                         frag_passive_dwell = (global_cnt < 2) ? 40 : 20;
 329                         params->max_out_time = frag_passive_dwell;
 330                 } else {
 331                         params->suspend_time = 120;
 332                         params->max_out_time = 120;
 333                 }
 334         }
 335
 336         if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
 337                                    IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
 338                 /*
 339                  * P2P device scan should not be fragmented to avoid negative
 340                  * impact on P2P device discovery. Configure max_out_time to be
 341                  * equal to dwell time on passive channel. Take a longest
 342                  * possible value, one that corresponds to 2GHz band
 343                  */
 344                 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 345                         u32 passive_dwell =
 346                                 iwl_mvm_get_passive_dwell(mvm,
 347                                                           IEEE80211_BAND_2GHZ);
 348                         params->max_out_time = passive_dwell;
 349                 } else {
 350                         params->passive_fragmented = true;
 351                 }
 352         }
 353
 354         if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
 355                 params->max_out_time = 200;
 356
 357 not_bound:
 358
 359         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
 360                 if (params->passive_fragmented)
 361                         params->dwell[band].passive = frag_passive_dwell;
 362                 else
 363                         params->dwell[band].passive =
 364                                 iwl_mvm_get_passive_dwell(mvm, band);
 365                 params->dwell[band].active = iwl_mvm_get_active_dwell(mvm, band,
 366                                                                       n_ssids);
 367         }
 368 }
 369
 370 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 371 {
 372         /* require rrm scan whenever the fw supports it */
 373         return mvm->fw->ucode_capa.capa[0] &
 374                IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
 375 }
 376
 377 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm,
 378                                            bool is_sched_scan)
 379 {
 380         int max_probe_len;
 381
 382         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 383                 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 384         else
 385                 max_probe_len = mvm->fw->ucode_capa.max_probe_length;
 386
 387         /* we create the 802.11 header and SSID element */
 388         max_probe_len -= 24 + 2;
 389
 390         /* basic ssid is added only for hw_scan with and old api */
 391         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) &&
 392             !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) &&
 393             !is_sched_scan)
 394                 max_probe_len -= 32;
 395
 396         /* DS parameter set element is added on 2.4GHZ band if required */
 397         if (iwl_mvm_rrm_scan_needed(mvm))
 398                 max_probe_len -= 3;
 399
 400         return max_probe_len;
 401 }
 402
 403 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan)
 404 {
 405         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan);
 406
 407         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN))
 408                 return max_ie_len;
 409
 410         /* TODO: [BUG] This function should return the maximum allowed size of
 411          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 412          * in the same command. So the correct implementation of this function
 413          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 414          * command has only 512 bytes and it would leave us with about 240
 415          * bytes for scan IEs, which is clearly not enough. So meanwhile
 416          * we will report an incorrect value. This may result in a failure to
 417          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 418          * functions with -ENOBUFS, if a large enough probe will be provided.
 419          */
 420         return max_ie_len;
 421 }
 422
 423 int iwl_mvm_scan_request(struct iwl_mvm *mvm,
 424                          struct ieee80211_vif *vif,
 425                          struct cfg80211_scan_request *req)
 426 {
 427         struct iwl_host_cmd hcmd = {
 428                 .id = SCAN_REQUEST_CMD,
 429                 .len = { 0, },
 430                 .data = { mvm->scan_cmd, },
 431                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 432         };
 433         struct iwl_scan_cmd *cmd = mvm->scan_cmd;
 434         int ret;
 435         u32 status;
 436         int ssid_len = 0;
 437         u8 *ssid = NULL;
 438         bool basic_ssid = !(mvm->fw->ucode_capa.flags &
 439                            IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
 440         struct iwl_mvm_scan_params params = {};
 441
 442         lockdep_assert_held(&mvm->mutex);
 443
 444         /* we should have failed registration if scan_cmd was NULL */
 445         if (WARN_ON(mvm->scan_cmd == NULL))
 446                 return -ENOMEM;
 447
 448         IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
 449         mvm->scan_status = IWL_MVM_SCAN_OS;
 450         memset(cmd, 0, ksize(cmd));
 451
 452         cmd->channel_count = (u8)req->n_channels;
 453         cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
 454         cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
 455         cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
 456
 457         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, &params);
 458         cmd->max_out_time = cpu_to_le32(params.max_out_time);
 459         cmd->suspend_time = cpu_to_le32(params.suspend_time);
 460         if (params.passive_fragmented)
 461                 cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
 462
 463         cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
 464         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 465                                         MAC_FILTER_IN_BEACON);
 466
 467         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 468                 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
 469         else
 470                 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
 471
 472         cmd->repeats = cpu_to_le32(1);
 473
 474         /*
 475          * If the user asked for passive scan, don't change to active scan if
 476          * you see any activity on the channel - remain passive.
 477          */
 478         if (req->n_ssids > 0) {
 479                 cmd->passive2active = cpu_to_le16(1);
 480                 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
 481                 if (basic_ssid) {
 482                         ssid = req->ssids[0].ssid;
 483                         ssid_len = req->ssids[0].ssid_len;
 484                 }
 485         } else {
 486                 cmd->passive2active = 0;
 487                 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
 488         }
 489
 490         iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids,
 491                                 basic_ssid ? 1 : 0);
 492
 493         cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 494                                            3 << TX_CMD_FLG_BT_PRIO_POS);
 495
 496         cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
 497         cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 498         cmd->tx_cmd.rate_n_flags =
 499                         iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
 500                                                   req->no_cck);
 501
 502         cmd->tx_cmd.len =
 503                 cpu_to_le16(iwl_mvm_fill_probe_req(
 504                             (struct ieee80211_mgmt *)cmd->data,
 505                             vif->addr,
 506                             req->n_ssids, ssid, ssid_len,
 507                             req->ie, req->ie_len, NULL, 0,
 508                             mvm->fw->ucode_capa.max_probe_length));
 509
 510         iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, &params);
 511
 512         cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
 513                 le16_to_cpu(cmd->tx_cmd.len) +
 514                 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
 515         hcmd.len[0] = le16_to_cpu(cmd->len);
 516
 517         status = SCAN_RESPONSE_OK;
 518         ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
 519         if (!ret && status == SCAN_RESPONSE_OK) {
 520                 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
 521         } else {
 522                 /*
 523                  * If the scan failed, it usually means that the FW was unable
 524                  * to allocate the time events. Warn on it, but maybe we
 525                  * should try to send the command again with different params.
 526                  */
 527                 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
 528                         status, ret);
 529                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 530                 ret = -EIO;
 531         }
 532         return ret;
 533 }
 534
 535 int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 536                           struct iwl_device_cmd *cmd)
 537 {
 538         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 539         struct iwl_cmd_response *resp = (void *)pkt->data;
 540
 541         IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
 542                        le32_to_cpu(resp->status));
 543         return 0;
 544 }
 545
 546 int iwl_mvm_rx_scan_offload_iter_complete_notif(struct iwl_mvm *mvm,
 547                                                 struct iwl_rx_cmd_buffer *rxb,
 548                                                 struct iwl_device_cmd *cmd)
 549 {
 550         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 551         struct iwl_scan_complete_notif *notif = (void *)pkt->data;
 552
 553         IWL_DEBUG_SCAN(mvm,
 554                        "Scan offload iteration complete: status=0x%x scanned channels=%d\n",
 555                        notif->status, notif->scanned_channels);
 556         return 0;
 557 }
 558
 559 int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 560                           struct iwl_device_cmd *cmd)
 561 {
 562         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 563         struct iwl_scan_complete_notif *notif = (void *)pkt->data;
 564
 565         lockdep_assert_held(&mvm->mutex);
 566
 567         IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
 568                        notif->status, notif->scanned_channels);
 569
 570         if (mvm->scan_status == IWL_MVM_SCAN_OS)
 571                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 572         ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
 573
 574         iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 575
 576         return 0;
 577 }
 578
 579 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
 580                                     struct iwl_rx_cmd_buffer *rxb,
 581                                     struct iwl_device_cmd *cmd)
 582 {
 583         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 584
 585         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) &&
 586             !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
 587                 struct iwl_sched_scan_results *notif = (void *)pkt->data;
 588
 589                 if (!(notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN))
 590                         return 0;
 591         }
 592
 593         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 594         ieee80211_sched_scan_results(mvm->hw);
 595
 596         return 0;
 597 }
 598
 599 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
 600                                      struct iwl_rx_packet *pkt, void *data)
 601 {
 602         struct iwl_mvm *mvm =
 603                 container_of(notif_wait, struct iwl_mvm, notif_wait);
 604         struct iwl_scan_complete_notif *notif;
 605         u32 *resp;
 606
 607         switch (pkt->hdr.cmd) {
 608         case SCAN_ABORT_CMD:
 609                 resp = (void *)pkt->data;
 610                 if (*resp == CAN_ABORT_STATUS) {
 611                         IWL_DEBUG_SCAN(mvm,
 612                                        "Scan can be aborted, wait until completion\n");
 613                         return false;
 614                 }
 615
 616                 /*
 617                  * If scan cannot be aborted, it means that we had a
 618                  * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
 619                  * ieee80211_scan_completed already.
 620                  */
 621                 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
 622                                *resp);
 623                 return true;
 624
 625         case SCAN_COMPLETE_NOTIFICATION:
 626                 notif = (void *)pkt->data;
 627                 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
 628                                notif->status);
 629                 return true;
 630
 631         default:
 632                 WARN_ON(1);
 633                 return false;
 634         };
 635 }
 636
 637 static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm)
 638 {
 639         struct iwl_notification_wait wait_scan_abort;
 640         static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
 641                                                SCAN_COMPLETE_NOTIFICATION };
 642         int ret;
 643
 644         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
 645                                    scan_abort_notif,
 646                                    ARRAY_SIZE(scan_abort_notif),
 647                                    iwl_mvm_scan_abort_notif, NULL);
 648
 649         ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
 650         if (ret) {
 651                 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
 652                 /* mac80211's state will be cleaned in the nic_restart flow */
 653                 goto out_remove_notif;
 654         }
 655
 656         return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
 657
 658 out_remove_notif:
 659         iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
 660         return ret;
 661 }
 662
 663 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
 664                                            struct iwl_rx_cmd_buffer *rxb,
 665                                            struct iwl_device_cmd *cmd)
 666 {
 667         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 668         u8 status, ebs_status;
 669
 670         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
 671                 struct iwl_periodic_scan_complete *scan_notif;
 672
 673                 scan_notif = (void *)pkt->data;
 674                 status = scan_notif->status;
 675                 ebs_status = scan_notif->ebs_status;
 676         } else  {
 677                 struct iwl_scan_offload_complete *scan_notif;
 678
 679                 scan_notif = (void *)pkt->data;
 680                 status = scan_notif->status;
 681                 ebs_status = scan_notif->ebs_status;
 682         }
 683         /* scan status must be locked for proper checking */
 684         lockdep_assert_held(&mvm->mutex);
 685
 686         IWL_DEBUG_SCAN(mvm,
 687                        "%s completed, status %s, EBS status %s\n",
 688                        mvm->scan_status == IWL_MVM_SCAN_SCHED ?
 689                                 "Scheduled scan" : "Scan",
 690                        status == IWL_SCAN_OFFLOAD_COMPLETED ?
 691                                 "completed" : "aborted",
 692                        ebs_status == IWL_SCAN_EBS_SUCCESS ?
 693                                 "success" : "failed");
 694
 695
 696         /* only call mac80211 completion if the stop was initiated by FW */
 697         if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
 698                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 699                 ieee80211_sched_scan_stopped(mvm->hw);
 700         } else if (mvm->scan_status == IWL_MVM_SCAN_OS) {
 701                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 702                 ieee80211_scan_completed(mvm->hw,
 703                                          status == IWL_SCAN_OFFLOAD_ABORTED);
 704                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 705         }
 706
 707         if (ebs_status)
 708                 mvm->last_ebs_successful = false;
 709
 710         return 0;
 711 }
 712
 713 static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
 714                                           struct ieee80211_vif *vif,
 715                                           struct ieee80211_scan_ies *ies,
 716                                           enum ieee80211_band band,
 717                                           struct iwl_tx_cmd *cmd,
 718                                           u8 *data)
 719 {
 720         u16 cmd_len;
 721
 722         cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
 723         cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 724         cmd->sta_id = mvm->aux_sta.sta_id;
 725
 726         cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
 727
 728         cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
 729                                          vif->addr,
 730                                          1, NULL, 0,
 731                                          ies->ies[band], ies->len[band],
 732                                          ies->common_ies, ies->common_ie_len,
 733                                          SCAN_OFFLOAD_PROBE_REQ_SIZE);
 734         cmd->len = cpu_to_le16(cmd_len);
 735 }
 736
 737 static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
 738                                struct ieee80211_vif *vif,
 739                                struct cfg80211_sched_scan_request *req,
 740                                struct iwl_scan_offload_cmd *scan,
 741                                struct iwl_mvm_scan_params *params)
 742 {
 743         scan->channel_count = req->n_channels;
 744         scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
 745         scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
 746         scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
 747         scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
 748
 749         scan->max_out_time = cpu_to_le32(params->max_out_time);
 750         scan->suspend_time = cpu_to_le32(params->suspend_time);
 751
 752         scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 753                                           MAC_FILTER_IN_BEACON);
 754         scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
 755         scan->rep_count = cpu_to_le32(1);
 756
 757         if (params->passive_fragmented)
 758                 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
 759 }
 760
 761 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 762 {
 763         int i;
 764
 765         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 766                 if (!ssid_list[i].len)
 767                         break;
 768                 if (ssid_list[i].len == ssid_len &&
 769                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 770                         return i;
 771         }
 772         return -1;
 773 }
 774
 775 static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
 776                                         struct iwl_ssid_ie *direct_scan,
 777                                         u32 *ssid_bitmap, bool basic_ssid)
 778 {
 779         int i, j;
 780         int index;
 781
 782         /*
 783          * copy SSIDs from match list.
 784          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 785          * config match list.
 786          */
 787         for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
 788                 /* skip empty SSID matchsets */
 789                 if (!req->match_sets[i].ssid.ssid_len)
 790                         continue;
 791                 direct_scan[i].id = WLAN_EID_SSID;
 792                 direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
 793                 memcpy(direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
 794                        direct_scan[i].len);
 795         }
 796
 797         /* add SSIDs from scan SSID list */
 798         *ssid_bitmap = 0;
 799         for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
 800                 index = iwl_ssid_exist(req->ssids[j].ssid,
 801                                        req->ssids[j].ssid_len,
 802                                        direct_scan);
 803                 if (index < 0) {
 804                         if (!req->ssids[j].ssid_len && basic_ssid)
 805                                 continue;
 806                         direct_scan[i].id = WLAN_EID_SSID;
 807                         direct_scan[i].len = req->ssids[j].ssid_len;
 808                         memcpy(direct_scan[i].ssid, req->ssids[j].ssid,
 809                                direct_scan[i].len);
 810                         *ssid_bitmap |= BIT(i + 1);
 811                         i++;
 812                 } else {
 813                         *ssid_bitmap |= BIT(index + 1);
 814                 }
 815         }
 816 }
 817
 818 static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
 819                                   struct cfg80211_sched_scan_request *req,
 820                                   u8 *channels_buffer,
 821                                   enum ieee80211_band band,
 822                                   int *head,
 823                                   u32 ssid_bitmap,
 824                                   struct iwl_mvm_scan_params *params)
 825 {
 826         u32 n_channels = mvm->fw->ucode_capa.n_scan_channels;
 827         __le32 *type = (__le32 *)channels_buffer;
 828         __le16 *channel_number = (__le16 *)(type + n_channels);
 829         __le16 *iter_count = channel_number + n_channels;
 830         __le32 *iter_interval = (__le32 *)(iter_count + n_channels);
 831         u8 *active_dwell = (u8 *)(iter_interval + n_channels);
 832         u8 *passive_dwell = active_dwell + n_channels;
 833         int i, index = 0;
 834
 835         for (i = 0; i < req->n_channels; i++) {
 836                 struct ieee80211_channel *chan = req->channels[i];
 837
 838                 if (chan->band != band)
 839                         continue;
 840
 841                 index = *head;
 842                 (*head)++;
 843
 844                 channel_number[index] = cpu_to_le16(chan->hw_value);
 845                 active_dwell[index] = params->dwell[band].active;
 846                 passive_dwell[index] = params->dwell[band].passive;
 847
 848                 iter_count[index] = cpu_to_le16(1);
 849                 iter_interval[index] = 0;
 850
 851                 if (!(chan->flags & IEEE80211_CHAN_NO_IR))
 852                         type[index] |=
 853                                 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
 854
 855                 type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL |
 856                                            IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
 857
 858                 if (chan->flags & IEEE80211_CHAN_NO_HT40)
 859                         type[index] |=
 860                                 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
 861
 862                 /* scan for all SSIDs from req->ssids */
 863                 type[index] |= cpu_to_le32(ssid_bitmap);
 864         }
 865 }
 866
 867 int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
 868                               struct ieee80211_vif *vif,
 869                               struct cfg80211_sched_scan_request *req,
 870                               struct ieee80211_scan_ies *ies)
 871 {
 872         int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
 873         int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
 874         int head = 0;
 875         u32 ssid_bitmap;
 876         int cmd_len;
 877         int ret;
 878         u8 *probes;
 879         bool basic_ssid = !(mvm->fw->ucode_capa.flags &
 880                             IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
 881
 882         struct iwl_scan_offload_cfg *scan_cfg;
 883         struct iwl_host_cmd cmd = {
 884                 .id = SCAN_OFFLOAD_CONFIG_CMD,
 885         };
 886         struct iwl_mvm_scan_params params = {};
 887
 888         lockdep_assert_held(&mvm->mutex);
 889
 890         cmd_len = sizeof(struct iwl_scan_offload_cfg) +
 891                   mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE +
 892                   2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
 893
 894         scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
 895         if (!scan_cfg)
 896                 return -ENOMEM;
 897
 898         probes = scan_cfg->data +
 899                 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE;
 900
 901         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
 902         iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, &params);
 903         scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
 904
 905         iwl_scan_offload_build_ssid(req, scan_cfg->scan_cmd.direct_scan,
 906                                     &ssid_bitmap, basic_ssid);
 907         /* build tx frames for supported bands */
 908         if (band_2ghz) {
 909                 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
 910                                               IEEE80211_BAND_2GHZ,
 911                                               &scan_cfg->scan_cmd.tx_cmd[0],
 912                                               probes);
 913                 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
 914                                       IEEE80211_BAND_2GHZ, &head,
 915                                       ssid_bitmap, &params);
 916         }
 917         if (band_5ghz) {
 918                 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
 919                                               IEEE80211_BAND_5GHZ,
 920                                               &scan_cfg->scan_cmd.tx_cmd[1],
 921                                               probes +
 922                                                 SCAN_OFFLOAD_PROBE_REQ_SIZE);
 923                 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
 924                                       IEEE80211_BAND_5GHZ, &head,
 925                                       ssid_bitmap, &params);
 926         }
 927
 928         cmd.data[0] = scan_cfg;
 929         cmd.len[0] = cmd_len;
 930         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 931
 932         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
 933
 934         ret = iwl_mvm_send_cmd(mvm, &cmd);
 935         kfree(scan_cfg);
 936         return ret;
 937 }
 938
 939 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 940                                        struct cfg80211_sched_scan_request *req)
 941 {
 942         struct iwl_scan_offload_profile *profile;
 943         struct iwl_scan_offload_profile_cfg *profile_cfg;
 944         struct iwl_scan_offload_blacklist *blacklist;
 945         struct iwl_host_cmd cmd = {
 946                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 947                 .len[1] = sizeof(*profile_cfg),
 948                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 949                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 950         };
 951         int blacklist_len;
 952         int i;
 953         int ret;
 954
 955         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 956                         return -EIO;
 957
 958         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 959                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 960         else
 961                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 962
 963         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 964         if (!blacklist)
 965                 return -ENOMEM;
 966
 967         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 968         if (!profile_cfg) {
 969                 ret = -ENOMEM;
 970                 goto free_blacklist;
 971         }
 972
 973         cmd.data[0] = blacklist;
 974         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 975         cmd.data[1] = profile_cfg;
 976
 977         /* No blacklist configuration */
 978
 979         profile_cfg->num_profiles = req->n_match_sets;
 980         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 981         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 982         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 983         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 984                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 985
 986         for (i = 0; i < req->n_match_sets; i++) {
 987                 profile = &profile_cfg->profiles[i];
 988                 profile->ssid_index = i;
 989                 /* Support any cipher and auth algorithm */
 990                 profile->unicast_cipher = 0xff;
 991                 profile->auth_alg = 0xff;
 992                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 993                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 994                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 995         }
 996
 997         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 998
 999         ret = iwl_mvm_send_cmd(mvm, &cmd);
1000         kfree(profile_cfg);
1001 free_blacklist:
1002         kfree(blacklist);
1003
1004         return ret;
1005 }
1006
1007 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm,
1008                                   struct cfg80211_sched_scan_request *req)
1009 {
1010         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
1011                 IWL_DEBUG_SCAN(mvm,
1012                                "Sending scheduled scan with filtering, n_match_sets %d\n",
1013                                req->n_match_sets);
1014                 return false;
1015         }
1016
1017         IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n");
1018         return true;
1019 }
1020
1021 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
1022                              struct cfg80211_sched_scan_request *req)
1023 {
1024         struct iwl_scan_offload_req scan_req = {
1025                 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
1026
1027                 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
1028                 .schedule_line[0].delay = cpu_to_le16(req->interval / 1000),
1029                 .schedule_line[0].full_scan_mul = 1,
1030
1031                 .schedule_line[1].iterations = 0xff,
1032                 .schedule_line[1].delay = cpu_to_le16(req->interval / 1000),
1033                 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
1034         };
1035
1036         if (iwl_mvm_scan_pass_all(mvm, req))
1037                 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
1038
1039         if (mvm->last_ebs_successful &&
1040             mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
1041                 scan_req.flags |=
1042                         cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
1043
1044         return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
1045                                     sizeof(scan_req), &scan_req);
1046 }
1047
1048 int iwl_mvm_scan_offload_start(struct iwl_mvm *mvm,
1049                                struct ieee80211_vif *vif,
1050                                struct cfg80211_sched_scan_request *req,
1051                                struct ieee80211_scan_ies *ies)
1052 {
1053         int ret;
1054
1055         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1056                 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1057                 if (ret)
1058                         return ret;
1059                 ret = iwl_mvm_sched_scan_umac(mvm, vif, req, ies);
1060         } else if ((mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
1061                 mvm->scan_status = IWL_MVM_SCAN_SCHED;
1062                 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1063                 if (ret)
1064                         return ret;
1065                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
1066         } else {
1067                 mvm->scan_status = IWL_MVM_SCAN_SCHED;
1068                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1069                 if (ret)
1070                         return ret;
1071                 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1072                 if (ret)
1073                         return ret;
1074                 ret = iwl_mvm_sched_scan_start(mvm, req);
1075         }
1076
1077         return ret;
1078 }
1079
1080 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
1081 {
1082         int ret;
1083         struct iwl_host_cmd cmd = {
1084                 .id = SCAN_OFFLOAD_ABORT_CMD,
1085         };
1086         u32 status;
1087
1088         /* Exit instantly with error when device is not ready
1089          * to receive scan abort command or it does not perform
1090          * scheduled scan currently */
1091         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1092             (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1093              mvm->scan_status != IWL_MVM_SCAN_OS))
1094                 return -EIO;
1095
1096         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
1097         if (ret)
1098                 return ret;
1099
1100         if (status != CAN_ABORT_STATUS) {
1101                 /*
1102                  * The scan abort will return 1 for success or
1103                  * 2 for "failure".  A failure condition can be
1104                  * due to simply not being in an active scan which
1105                  * can occur if we send the scan abort before the
1106                  * microcode has notified us that a scan is completed.
1107                  */
1108                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
1109                 ret = -ENOENT;
1110         }
1111
1112         return ret;
1113 }
1114
1115 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
1116 {
1117         int ret;
1118         struct iwl_notification_wait wait_scan_done;
1119         static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
1120         bool sched = mvm->scan_status == IWL_MVM_SCAN_SCHED;
1121
1122         lockdep_assert_held(&mvm->mutex);
1123
1124         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1125                 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN,
1126                                           notify);
1127
1128         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1129                 return 0;
1130
1131         if (iwl_mvm_is_radio_killed(mvm)) {
1132                 ret = 0;
1133                 goto out;
1134         }
1135
1136         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1137             (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1138              mvm->scan_status != IWL_MVM_SCAN_OS)) {
1139                 IWL_DEBUG_SCAN(mvm, "No scan to stop\n");
1140                 return 0;
1141         }
1142
1143         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1144                                    scan_done_notif,
1145                                    ARRAY_SIZE(scan_done_notif),
1146                                    NULL, NULL);
1147
1148         ret = iwl_mvm_send_scan_offload_abort(mvm);
1149         if (ret) {
1150                 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
1151                                sched ? "offloaded " : "", ret);
1152                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1153                 goto out;
1154         }
1155
1156         IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
1157                        sched ? "offloaded " : "");
1158
1159         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1160 out:
1161         /*
1162          * Clear the scan status so the next scan requests will succeed. This
1163          * also ensures the Rx handler doesn't do anything, as the scan was
1164          * stopped from above. Since the rx handler won't do anything now,
1165          * we have to release the scan reference here.
1166          */
1167         if (mvm->scan_status == IWL_MVM_SCAN_OS)
1168                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1169
1170         mvm->scan_status = IWL_MVM_SCAN_NONE;
1171
1172         if (notify) {
1173                 if (sched)
1174                         ieee80211_sched_scan_stopped(mvm->hw);
1175                 else
1176                         ieee80211_scan_completed(mvm->hw, true);
1177         }
1178
1179         return ret;
1180 }
1181
1182 static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm *mvm,
1183                                              struct iwl_scan_req_tx_cmd *tx_cmd,
1184                                              bool no_cck)
1185 {
1186         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1187                                          TX_CMD_FLG_BT_DIS);
1188         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1189                                                            IEEE80211_BAND_2GHZ,
1190                                                            no_cck);
1191         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
1192
1193         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1194                                          TX_CMD_FLG_BT_DIS);
1195         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1196                                                            IEEE80211_BAND_5GHZ,
1197                                                            no_cck);
1198         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
1199 }
1200
1201 static void
1202 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
1203                                struct ieee80211_channel **channels,
1204                                int n_channels, u32 ssid_bitmap,
1205                                struct iwl_scan_req_unified_lmac *cmd)
1206 {
1207         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
1208         int i;
1209
1210         for (i = 0; i < n_channels; i++) {
1211                 channel_cfg[i].channel_num =
1212                         cpu_to_le16(channels[i]->hw_value);
1213                 channel_cfg[i].iter_count = cpu_to_le16(1);
1214                 channel_cfg[i].iter_interval = 0;
1215                 channel_cfg[i].flags =
1216                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
1217                                     ssid_bitmap);
1218         }
1219 }
1220
1221 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies,
1222                                            size_t len, u8 *const pos)
1223 {
1224         static const u8 before_ds_params[] = {
1225                         WLAN_EID_SSID,
1226                         WLAN_EID_SUPP_RATES,
1227                         WLAN_EID_REQUEST,
1228                         WLAN_EID_EXT_SUPP_RATES,
1229         };
1230         size_t offs;
1231         u8 *newpos = pos;
1232
1233         if (!iwl_mvm_rrm_scan_needed(mvm)) {
1234                 memcpy(newpos, ies, len);
1235                 return newpos + len;
1236         }
1237
1238         offs = ieee80211_ie_split(ies, len,
1239                                   before_ds_params,
1240                                   ARRAY_SIZE(before_ds_params),
1241                                   0);
1242
1243         memcpy(newpos, ies, offs);
1244         newpos += offs;
1245
1246         /* Add a placeholder for DS Parameter Set element */
1247         *newpos++ = WLAN_EID_DS_PARAMS;
1248         *newpos++ = 1;
1249         *newpos++ = 0;
1250
1251         memcpy(newpos, ies + offs, len - offs);
1252         newpos += len - offs;
1253
1254         return newpos;
1255 }
1256
1257 static void
1258 iwl_mvm_build_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1259                                  struct ieee80211_scan_ies *ies,
1260                                  struct iwl_scan_probe_req *preq,
1261                                  const u8 *mac_addr, const u8 *mac_addr_mask)
1262 {
1263         struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
1264         u8 *pos, *newpos;
1265
1266         /*
1267          * Unfortunately, right now the offload scan doesn't support randomising
1268          * within the firmware, so until the firmware API is ready we implement
1269          * it in the driver. This means that the scan iterations won't really be
1270          * random, only when it's restarted, but at least that helps a bit.
1271          */
1272         if (mac_addr)
1273                 get_random_mask_addr(frame->sa, mac_addr, mac_addr_mask);
1274         else
1275                 memcpy(frame->sa, vif->addr, ETH_ALEN);
1276
1277         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1278         eth_broadcast_addr(frame->da);
1279         eth_broadcast_addr(frame->bssid);
1280         frame->seq_ctrl = 0;
1281
1282         pos = frame->u.probe_req.variable;
1283         *pos++ = WLAN_EID_SSID;
1284         *pos++ = 0;
1285
1286         preq->mac_header.offset = 0;
1287         preq->mac_header.len = cpu_to_le16(24 + 2);
1288
1289         /* Insert ds parameter set element on 2.4 GHz band */
1290         newpos = iwl_mvm_copy_and_insert_ds_elem(mvm,
1291                                                  ies->ies[IEEE80211_BAND_2GHZ],
1292                                                  ies->len[IEEE80211_BAND_2GHZ],
1293                                                  pos);
1294         preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
1295         preq->band_data[0].len = cpu_to_le16(newpos - pos);
1296         pos = newpos;
1297
1298         memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
1299                ies->len[IEEE80211_BAND_5GHZ]);
1300         preq->band_data[1].offset = cpu_to_le16(pos - preq->buf);
1301         preq->band_data[1].len = cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
1302         pos += ies->len[IEEE80211_BAND_5GHZ];
1303
1304         memcpy(pos, ies->common_ies, ies->common_ie_len);
1305         preq->common_data.offset = cpu_to_le16(pos - preq->buf);
1306         preq->common_data.len = cpu_to_le16(ies->common_ie_len);
1307 }
1308
1309 static void
1310 iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
1311                                        struct iwl_scan_req_unified_lmac *cmd,
1312                                        struct iwl_mvm_scan_params *params)
1313 {
1314         memset(cmd, 0, ksize(cmd));
1315         cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1316         cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1317         if (params->passive_fragmented)
1318                 cmd->fragmented_dwell =
1319                                 params->dwell[IEEE80211_BAND_2GHZ].passive;
1320         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
1321         cmd->max_out_time = cpu_to_le32(params->max_out_time);
1322         cmd->suspend_time = cpu_to_le32(params->suspend_time);
1323         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1324         cmd->iter_num = cpu_to_le32(1);
1325
1326         if (iwl_mvm_rrm_scan_needed(mvm))
1327                 cmd->scan_flags |=
1328                         cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
1329 }
1330
1331 int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
1332                               struct ieee80211_vif *vif,
1333                               struct ieee80211_scan_request *req)
1334 {
1335         struct iwl_host_cmd hcmd = {
1336                 .id = SCAN_OFFLOAD_REQUEST_CMD,
1337                 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1338                          sizeof(struct iwl_scan_channel_cfg_lmac) *
1339                                 mvm->fw->ucode_capa.n_scan_channels +
1340                          sizeof(struct iwl_scan_probe_req), },
1341                 .data = { mvm->scan_cmd, },
1342                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1343         };
1344         struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1345         struct iwl_scan_probe_req *preq;
1346         struct iwl_mvm_scan_params params = {};
1347         u32 flags;
1348         u32 ssid_bitmap = 0;
1349         int ret, i;
1350
1351         lockdep_assert_held(&mvm->mutex);
1352
1353         /* we should have failed registration if scan_cmd was NULL */
1354         if (WARN_ON(mvm->scan_cmd == NULL))
1355                 return -ENOMEM;
1356
1357         if (req->req.n_ssids > PROBE_OPTION_MAX ||
1358             req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] +
1359             req->ies.len[NL80211_BAND_5GHZ] >
1360                 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) ||
1361             req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
1362                 return -ENOBUFS;
1363
1364         mvm->scan_status = IWL_MVM_SCAN_OS;
1365
1366         iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1367                                  &params);
1368
1369         iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1370
1371         cmd->n_channels = (u8)req->req.n_channels;
1372
1373         flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1374
1375         if (req->req.n_ssids == 1 && req->req.ssids[0].ssid_len != 0)
1376                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1377
1378         if (params.passive_fragmented)
1379                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1380
1381         if (req->req.n_ssids == 0)
1382                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1383
1384         cmd->scan_flags |= cpu_to_le32(flags);
1385
1386         cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band);
1387         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1388                                         MAC_FILTER_IN_BEACON);
1389         iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, req->req.no_cck);
1390         iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->req.ssids,
1391                                 req->req.n_ssids, 0);
1392
1393         cmd->schedule[0].delay = 0;
1394         cmd->schedule[0].iterations = 1;
1395         cmd->schedule[0].full_scan_mul = 0;
1396         cmd->schedule[1].delay = 0;
1397         cmd->schedule[1].iterations = 0;
1398         cmd->schedule[1].full_scan_mul = 0;
1399
1400         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
1401             mvm->last_ebs_successful) {
1402                 cmd->channel_opt[0].flags =
1403                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1404                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1405                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1406                 cmd->channel_opt[0].non_ebs_ratio =
1407                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
1408                 cmd->channel_opt[1].flags =
1409                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1410                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1411                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1412                 cmd->channel_opt[1].non_ebs_ratio =
1413                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1414         }
1415
1416         for (i = 1; i <= req->req.n_ssids; i++)
1417                 ssid_bitmap |= BIT(i);
1418
1419         iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels,
1420                                        req->req.n_channels, ssid_bitmap,
1421                                        cmd);
1422
1423         preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1424                         mvm->fw->ucode_capa.n_scan_channels);
1425
1426         iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, preq,
1427                 req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1428                         req->req.mac_addr : NULL,
1429                 req->req.mac_addr_mask);
1430
1431         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1432         if (!ret) {
1433                 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1434         } else {
1435                 /*
1436                  * If the scan failed, it usually means that the FW was unable
1437                  * to allocate the time events. Warn on it, but maybe we
1438                  * should try to send the command again with different params.
1439                  */
1440                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1441                 mvm->scan_status = IWL_MVM_SCAN_NONE;
1442                 ret = -EIO;
1443         }
1444         return ret;
1445 }
1446
1447 int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
1448                                     struct ieee80211_vif *vif,
1449                                     struct cfg80211_sched_scan_request *req,
1450                                     struct ieee80211_scan_ies *ies)
1451 {
1452         struct iwl_host_cmd hcmd = {
1453                 .id = SCAN_OFFLOAD_REQUEST_CMD,
1454                 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1455                          sizeof(struct iwl_scan_channel_cfg_lmac) *
1456                                 mvm->fw->ucode_capa.n_scan_channels +
1457                          sizeof(struct iwl_scan_probe_req), },
1458                 .data = { mvm->scan_cmd, },
1459                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1460         };
1461         struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1462         struct iwl_scan_probe_req *preq;
1463         struct iwl_mvm_scan_params params = {};
1464         int ret;
1465         u32 flags = 0, ssid_bitmap = 0;
1466
1467         lockdep_assert_held(&mvm->mutex);
1468
1469         /* we should have failed registration if scan_cmd was NULL */
1470         if (WARN_ON(mvm->scan_cmd == NULL))
1471                 return -ENOMEM;
1472
1473         if (req->n_ssids > PROBE_OPTION_MAX ||
1474             ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1475             ies->len[NL80211_BAND_5GHZ] >
1476                 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) ||
1477             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1478                 return -ENOBUFS;
1479
1480         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
1481
1482         iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1483
1484         cmd->n_channels = (u8)req->n_channels;
1485
1486         if (iwl_mvm_scan_pass_all(mvm, req))
1487                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1488         else
1489                 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH;
1490
1491         if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0)
1492                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1493
1494         if (params.passive_fragmented)
1495                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1496
1497         if (req->n_ssids == 0)
1498                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1499
1500 #ifdef CONFIG_IWLWIFI_DEBUGFS
1501         if (mvm->scan_iter_notif_enabled)
1502                 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE;
1503 #endif
1504
1505         cmd->scan_flags |= cpu_to_le32(flags);
1506
1507         cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
1508         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1509                                         MAC_FILTER_IN_BEACON);
1510         iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, false);
1511         iwl_scan_offload_build_ssid(req, cmd->direct_scan, &ssid_bitmap, false);
1512
1513         cmd->schedule[0].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1514         cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1515         cmd->schedule[0].full_scan_mul = 1;
1516
1517         cmd->schedule[1].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1518         cmd->schedule[1].iterations = 0xff;
1519         cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1520
1521         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1522             mvm->last_ebs_successful) {
1523                 cmd->channel_opt[0].flags =
1524                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1525                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1526                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1527                 cmd->channel_opt[0].non_ebs_ratio =
1528                         cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO);
1529                 cmd->channel_opt[1].flags =
1530                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1531                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1532                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1533                 cmd->channel_opt[1].non_ebs_ratio =
1534                         cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO);
1535         }
1536
1537         iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1538                                        ssid_bitmap, cmd);
1539
1540         preq = (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) *
1541                         mvm->fw->ucode_capa.n_scan_channels);
1542
1543         iwl_mvm_build_unified_scan_probe(mvm, vif, ies, preq,
1544                 req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1545                         req->mac_addr : NULL,
1546                 req->mac_addr_mask);
1547
1548         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1549         if (!ret) {
1550                 IWL_DEBUG_SCAN(mvm,
1551                                "Sched scan request was sent successfully\n");
1552         } else {
1553                 /*
1554                  * If the scan failed, it usually means that the FW was unable
1555                  * to allocate the time events. Warn on it, but maybe we
1556                  * should try to send the command again with different params.
1557                  */
1558                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1559                 mvm->scan_status = IWL_MVM_SCAN_NONE;
1560                 ret = -EIO;
1561         }
1562         return ret;
1563 }
1564
1565
1566 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
1567 {
1568         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1569                 return iwl_umac_scan_stop(mvm, IWL_UMAC_SCAN_UID_REG_SCAN,
1570                                           true);
1571
1572         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
1573                 return 0;
1574
1575         if (iwl_mvm_is_radio_killed(mvm)) {
1576                 ieee80211_scan_completed(mvm->hw, true);
1577                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1578                 mvm->scan_status = IWL_MVM_SCAN_NONE;
1579                 return 0;
1580         }
1581
1582         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1583                 return iwl_mvm_scan_offload_stop(mvm, true);
1584         return iwl_mvm_cancel_regular_scan(mvm);
1585 }
1586
1587 /* UMAC scan API */
1588
1589 struct iwl_umac_scan_done {
1590         struct iwl_mvm *mvm;
1591         enum iwl_umac_scan_uid_type type;
1592 };
1593
1594 static int rate_to_scan_rate_flag(unsigned int rate)
1595 {
1596         static const int rate_to_scan_rate[IWL_RATE_COUNT] = {
1597                 [IWL_RATE_1M_INDEX]     = SCAN_CONFIG_RATE_1M,
1598                 [IWL_RATE_2M_INDEX]     = SCAN_CONFIG_RATE_2M,
1599                 [IWL_RATE_5M_INDEX]     = SCAN_CONFIG_RATE_5M,
1600                 [IWL_RATE_11M_INDEX]    = SCAN_CONFIG_RATE_11M,
1601                 [IWL_RATE_6M_INDEX]     = SCAN_CONFIG_RATE_6M,
1602                 [IWL_RATE_9M_INDEX]     = SCAN_CONFIG_RATE_9M,
1603                 [IWL_RATE_12M_INDEX]    = SCAN_CONFIG_RATE_12M,
1604                 [IWL_RATE_18M_INDEX]    = SCAN_CONFIG_RATE_18M,
1605                 [IWL_RATE_24M_INDEX]    = SCAN_CONFIG_RATE_24M,
1606                 [IWL_RATE_36M_INDEX]    = SCAN_CONFIG_RATE_36M,
1607                 [IWL_RATE_48M_INDEX]    = SCAN_CONFIG_RATE_48M,
1608                 [IWL_RATE_54M_INDEX]    = SCAN_CONFIG_RATE_54M,
1609         };
1610
1611         return rate_to_scan_rate[rate];
1612 }
1613
1614 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm)
1615 {
1616         struct ieee80211_supported_band *band;
1617         unsigned int rates = 0;
1618         int i;
1619
1620         band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1621         for (i = 0; i < band->n_bitrates; i++)
1622                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1623         band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1624         for (i = 0; i < band->n_bitrates; i++)
1625                 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value);
1626
1627         /* Set both basic rates and supported rates */
1628         rates |= SCAN_CONFIG_SUPPORTED_RATE(rates);
1629
1630         return cpu_to_le32(rates);
1631 }
1632
1633 int iwl_mvm_config_scan(struct iwl_mvm *mvm)
1634 {
1635
1636         struct iwl_scan_config *scan_config;
1637         struct ieee80211_supported_band *band;
1638         int num_channels =
1639                 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
1640                 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
1641         int ret, i, j = 0, cmd_size, data_size;
1642         struct iwl_host_cmd cmd = {
1643                 .id = SCAN_CFG_CMD,
1644         };
1645
1646         if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels))
1647                 return -ENOBUFS;
1648
1649         cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels;
1650
1651         scan_config = kzalloc(cmd_size, GFP_KERNEL);
1652         if (!scan_config)
1653                 return -ENOMEM;
1654
1655         data_size = cmd_size - sizeof(struct iwl_mvm_umac_cmd_hdr);
1656         scan_config->hdr.size = cpu_to_le16(data_size);
1657         scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE |
1658                                          SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS |
1659                                          SCAN_CONFIG_FLAG_SET_TX_CHAINS |
1660                                          SCAN_CONFIG_FLAG_SET_RX_CHAINS |
1661                                          SCAN_CONFIG_FLAG_SET_ALL_TIMES |
1662                                          SCAN_CONFIG_FLAG_SET_LEGACY_RATES |
1663                                          SCAN_CONFIG_FLAG_SET_MAC_ADDR |
1664                                          SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS|
1665                                          SCAN_CONFIG_N_CHANNELS(num_channels));
1666         scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm));
1667         scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm));
1668         scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm);
1669         scan_config->out_of_channel_time = cpu_to_le32(170);
1670         scan_config->suspend_time = cpu_to_le32(30);
1671         scan_config->dwell_active = 20;
1672         scan_config->dwell_passive = 110;
1673         scan_config->dwell_fragmented = 20;
1674
1675         memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN);
1676
1677         scan_config->bcast_sta_id = mvm->aux_sta.sta_id;
1678         scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS |
1679                                      IWL_CHANNEL_FLAG_ACCURATE_EBS |
1680                                      IWL_CHANNEL_FLAG_EBS_ADD |
1681                                      IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE;
1682
1683         band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
1684         for (i = 0; i < band->n_channels; i++, j++)
1685                 scan_config->channel_array[j] = band->channels[i].hw_value;
1686         band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
1687         for (i = 0; i < band->n_channels; i++, j++)
1688                 scan_config->channel_array[j] = band->channels[i].hw_value;
1689
1690         cmd.data[0] = scan_config;
1691         cmd.len[0] = cmd_size;
1692         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
1693
1694         IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n");
1695
1696         ret = iwl_mvm_send_cmd(mvm, &cmd);
1697
1698         kfree(scan_config);
1699         return ret;
1700 }
1701
1702 static int iwl_mvm_find_scan_uid(struct iwl_mvm *mvm, u32 uid)
1703 {
1704         int i;
1705
1706         for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1707                 if (mvm->scan_uid[i] == uid)
1708                         return i;
1709
1710         return i;
1711 }
1712
1713 static int iwl_mvm_find_free_scan_uid(struct iwl_mvm *mvm)
1714 {
1715         return iwl_mvm_find_scan_uid(mvm, 0);
1716 }
1717
1718 static bool iwl_mvm_find_scan_type(struct iwl_mvm *mvm,
1719                                    enum iwl_umac_scan_uid_type type)
1720 {
1721         int i;
1722
1723         for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++)
1724                 if (mvm->scan_uid[i] & type)
1725                         return true;
1726
1727         return false;
1728 }
1729
1730 static u32 iwl_generate_scan_uid(struct iwl_mvm *mvm,
1731                                  enum iwl_umac_scan_uid_type type)
1732 {
1733         u32 uid;
1734
1735         /* make sure exactly one bit is on in scan type */
1736         WARN_ON(hweight8(type) != 1);
1737
1738         /*
1739          * Make sure scan uids are unique. If one scan lasts long time while
1740          * others are completing frequently, the seq number will wrap up and
1741          * we may have more than one scan with the same uid.
1742          */
1743         do {
1744                 uid = type | (mvm->scan_seq_num <<
1745                               IWL_UMAC_SCAN_UID_SEQ_OFFSET);
1746                 mvm->scan_seq_num++;
1747         } while (iwl_mvm_find_scan_uid(mvm, uid) <
1748                  IWL_MVM_MAX_SIMULTANEOUS_SCANS);
1749
1750         IWL_DEBUG_SCAN(mvm, "Generated scan UID %u\n", uid);
1751
1752         return uid;
1753 }
1754
1755 static void
1756 iwl_mvm_build_generic_umac_scan_cmd(struct iwl_mvm *mvm,
1757                                     struct iwl_scan_req_umac *cmd,
1758                                     struct iwl_mvm_scan_params *params)
1759 {
1760         memset(cmd, 0, ksize(cmd));
1761         cmd->hdr.size = cpu_to_le16(iwl_mvm_scan_size(mvm) -
1762                                     sizeof(struct iwl_mvm_umac_cmd_hdr));
1763         cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1764         cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1765         if (params->passive_fragmented)
1766                 cmd->fragmented_dwell =
1767                                 params->dwell[IEEE80211_BAND_2GHZ].passive;
1768         cmd->max_out_time = cpu_to_le32(params->max_out_time);
1769         cmd->suspend_time = cpu_to_le32(params->suspend_time);
1770         cmd->scan_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1771 }
1772
1773 static void
1774 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm,
1775                                struct ieee80211_channel **channels,
1776                                int n_channels, u32 ssid_bitmap,
1777                                struct iwl_scan_req_umac *cmd)
1778 {
1779         struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data;
1780         int i;
1781
1782         for (i = 0; i < n_channels; i++) {
1783                 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap);
1784                 channel_cfg[i].channel_num = channels[i]->hw_value;
1785                 channel_cfg[i].iter_count = 1;
1786                 channel_cfg[i].iter_interval = 0;
1787         }
1788 }
1789
1790 static u32 iwl_mvm_scan_umac_common_flags(struct iwl_mvm *mvm, int n_ssids,
1791                                           struct cfg80211_ssid *ssids,
1792                                           int fragmented)
1793 {
1794         int flags = 0;
1795
1796         if (n_ssids == 0)
1797                 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE;
1798
1799         if (n_ssids == 1 && ssids[0].ssid_len != 0)
1800                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT;
1801
1802         if (fragmented)
1803                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED;
1804
1805         if (iwl_mvm_rrm_scan_needed(mvm))
1806                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED;
1807
1808         return flags;
1809 }
1810
1811 int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1812                       struct ieee80211_scan_request *req)
1813 {
1814         struct iwl_host_cmd hcmd = {
1815                 .id = SCAN_REQ_UMAC,
1816                 .len = { iwl_mvm_scan_size(mvm), },
1817                 .data = { mvm->scan_cmd, },
1818                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1819         };
1820         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1821         struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1822                 sizeof(struct iwl_scan_channel_cfg_umac) *
1823                         mvm->fw->ucode_capa.n_scan_channels;
1824         struct iwl_mvm_scan_params params = {};
1825         u32 uid, flags;
1826         u32 ssid_bitmap = 0;
1827         int ret, i, uid_idx;
1828
1829         lockdep_assert_held(&mvm->mutex);
1830
1831         uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1832         if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1833                 return -EBUSY;
1834
1835         /* we should have failed registration if scan_cmd was NULL */
1836         if (WARN_ON(mvm->scan_cmd == NULL))
1837                 return -ENOMEM;
1838
1839         if (WARN_ON(req->req.n_ssids > PROBE_OPTION_MAX ||
1840                     req->ies.common_ie_len +
1841                     req->ies.len[NL80211_BAND_2GHZ] +
1842                     req->ies.len[NL80211_BAND_5GHZ] + 24 + 2 >
1843                     SCAN_OFFLOAD_PROBE_REQ_SIZE || req->req.n_channels >
1844                     mvm->fw->ucode_capa.n_scan_channels))
1845                 return -ENOBUFS;
1846
1847         iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1848                                  &params);
1849
1850         iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1851
1852         uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_REG_SCAN);
1853         mvm->scan_uid[uid_idx] = uid;
1854         cmd->uid = cpu_to_le32(uid);
1855
1856         cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1857
1858         flags = iwl_mvm_scan_umac_common_flags(mvm, req->req.n_ssids,
1859                                                req->req.ssids,
1860                                                params.passive_fragmented);
1861
1862         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1863
1864         cmd->general_flags = cpu_to_le32(flags);
1865
1866         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_SINGLE_SCAN_EBS &&
1867             mvm->last_ebs_successful)
1868                 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1869                                      IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1870                                      IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1871
1872         cmd->n_channels = req->req.n_channels;
1873
1874         for (i = 0; i < req->req.n_ssids; i++)
1875                 ssid_bitmap |= BIT(i);
1876
1877         iwl_mvm_umac_scan_cfg_channels(mvm, req->req.channels,
1878                                        req->req.n_channels, ssid_bitmap, cmd);
1879
1880         sec_part->schedule[0].iter_count = 1;
1881         sec_part->delay = 0;
1882
1883         iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, &sec_part->preq,
1884                 req->req.flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1885                         req->req.mac_addr : NULL,
1886                 req->req.mac_addr_mask);
1887
1888         iwl_mvm_scan_fill_ssids(sec_part->direct_scan, req->req.ssids,
1889                                 req->req.n_ssids, 0);
1890
1891         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1892         if (!ret) {
1893                 IWL_DEBUG_SCAN(mvm,
1894                                "Scan request was sent successfully\n");
1895         } else {
1896                 /*
1897                  * If the scan failed, it usually means that the FW was unable
1898                  * to allocate the time events. Warn on it, but maybe we
1899                  * should try to send the command again with different params.
1900                  */
1901                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1902         }
1903         return ret;
1904 }
1905
1906 int iwl_mvm_sched_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1907                             struct cfg80211_sched_scan_request *req,
1908                             struct ieee80211_scan_ies *ies)
1909 {
1910
1911         struct iwl_host_cmd hcmd = {
1912                 .id = SCAN_REQ_UMAC,
1913                 .len = { iwl_mvm_scan_size(mvm), },
1914                 .data = { mvm->scan_cmd, },
1915                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1916         };
1917         struct iwl_scan_req_umac *cmd = mvm->scan_cmd;
1918         struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data +
1919                 sizeof(struct iwl_scan_channel_cfg_umac) *
1920                         mvm->fw->ucode_capa.n_scan_channels;
1921         struct iwl_mvm_scan_params params = {};
1922         u32 uid, flags;
1923         u32 ssid_bitmap = 0;
1924         int ret, uid_idx;
1925
1926         lockdep_assert_held(&mvm->mutex);
1927
1928         uid_idx = iwl_mvm_find_free_scan_uid(mvm);
1929         if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
1930                 return -EBUSY;
1931
1932         /* we should have failed registration if scan_cmd was NULL */
1933         if (WARN_ON(mvm->scan_cmd == NULL))
1934                 return -ENOMEM;
1935
1936         if (WARN_ON(req->n_ssids > PROBE_OPTION_MAX ||
1937                     ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1938                     ies->len[NL80211_BAND_5GHZ] + 24 + 2 >
1939                     SCAN_OFFLOAD_PROBE_REQ_SIZE || req->n_channels >
1940                     mvm->fw->ucode_capa.n_scan_channels))
1941                 return -ENOBUFS;
1942
1943         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags,
1944                                          &params);
1945
1946         iwl_mvm_build_generic_umac_scan_cmd(mvm, cmd, &params);
1947
1948         cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE);
1949
1950         uid = iwl_generate_scan_uid(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN);
1951         mvm->scan_uid[uid_idx] = uid;
1952         cmd->uid = cpu_to_le32(uid);
1953
1954         cmd->ooc_priority = cpu_to_le32(IWL_SCAN_PRIORITY_LOW);
1955
1956         flags = iwl_mvm_scan_umac_common_flags(mvm, req->n_ssids, req->ssids,
1957                                                params.passive_fragmented);
1958
1959         flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC;
1960
1961         if (iwl_mvm_scan_pass_all(mvm, req))
1962                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL;
1963         else
1964                 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH;
1965
1966         cmd->general_flags = cpu_to_le32(flags);
1967
1968         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1969             mvm->last_ebs_successful)
1970                 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS |
1971                                      IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1972                                      IWL_SCAN_CHANNEL_FLAG_CACHE_ADD;
1973
1974         cmd->n_channels = req->n_channels;
1975
1976         iwl_scan_offload_build_ssid(req, sec_part->direct_scan, &ssid_bitmap,
1977                                     false);
1978
1979         /* This API uses bits 0-19 instead of 1-20. */
1980         ssid_bitmap = ssid_bitmap >> 1;
1981
1982         iwl_mvm_umac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1983                                        ssid_bitmap, cmd);
1984
1985         sec_part->schedule[0].interval =
1986                                 cpu_to_le16(req->interval / MSEC_PER_SEC);
1987         sec_part->schedule[0].iter_count = 0xff;
1988
1989         sec_part->delay = 0;
1990
1991         iwl_mvm_build_unified_scan_probe(mvm, vif, ies, &sec_part->preq,
1992                 req->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ?
1993                         req->mac_addr : NULL,
1994                 req->mac_addr_mask);
1995
1996         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1997         if (!ret) {
1998                 IWL_DEBUG_SCAN(mvm,
1999                                "Sched scan request was sent successfully\n");
2000         } else {
2001                 /*
2002                  * If the scan failed, it usually means that the FW was unable
2003                  * to allocate the time events. Warn on it, but maybe we
2004                  * should try to send the command again with different params.
2005                  */
2006                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
2007         }
2008         return ret;
2009 }
2010
2011 int iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm,
2012                                         struct iwl_rx_cmd_buffer *rxb,
2013                                         struct iwl_device_cmd *cmd)
2014 {
2015         struct iwl_rx_packet *pkt = rxb_addr(rxb);
2016         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
2017         u32 uid = __le32_to_cpu(notif->uid);
2018         bool sched = !!(uid & IWL_UMAC_SCAN_UID_SCHED_SCAN);
2019         int uid_idx = iwl_mvm_find_scan_uid(mvm, uid);
2020
2021         /*
2022          * Scan uid may be set to zero in case of scan abort request from above.
2023          */
2024         if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
2025                 return 0;
2026
2027         IWL_DEBUG_SCAN(mvm,
2028                        "Scan completed, uid %u type %s, status %s, EBS status %s\n",
2029                        uid, sched ? "sched" : "regular",
2030                        notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
2031                                 "completed" : "aborted",
2032                        notif->ebs_status == IWL_SCAN_EBS_SUCCESS ?
2033                                 "success" : "failed");
2034
2035         if (notif->ebs_status)
2036                 mvm->last_ebs_successful = false;
2037
2038         mvm->scan_uid[uid_idx] = 0;
2039
2040         if (!sched) {
2041                 ieee80211_scan_completed(mvm->hw,
2042                                          notif->status ==
2043                                                 IWL_SCAN_OFFLOAD_ABORTED);
2044                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2045         } else if (!iwl_mvm_find_scan_type(mvm, IWL_UMAC_SCAN_UID_SCHED_SCAN)) {
2046                 ieee80211_sched_scan_stopped(mvm->hw);
2047         } else {
2048                 IWL_DEBUG_SCAN(mvm, "Another sched scan is running\n");
2049         }
2050
2051         return 0;
2052 }
2053
2054 static bool iwl_scan_umac_done_check(struct iwl_notif_wait_data *notif_wait,
2055                                      struct iwl_rx_packet *pkt, void *data)
2056 {
2057         struct iwl_umac_scan_done *scan_done = data;
2058         struct iwl_umac_scan_complete *notif = (void *)pkt->data;
2059         u32 uid = __le32_to_cpu(notif->uid);
2060         int uid_idx = iwl_mvm_find_scan_uid(scan_done->mvm, uid);
2061
2062         if (WARN_ON(pkt->hdr.cmd != SCAN_COMPLETE_UMAC))
2063                 return false;
2064
2065         if (uid_idx >= IWL_MVM_MAX_SIMULTANEOUS_SCANS)
2066                 return false;
2067
2068         /*
2069          * Clear scan uid of scans that was aborted from above and completed
2070          * in FW so the RX handler does nothing. Set last_ebs_successful here if
2071          * needed.
2072          */
2073         scan_done->mvm->scan_uid[uid_idx] = 0;
2074
2075         if (notif->ebs_status)
2076                 scan_done->mvm->last_ebs_successful = false;
2077
2078         return !iwl_mvm_find_scan_type(scan_done->mvm, scan_done->type);
2079 }
2080
2081 static int iwl_umac_scan_abort_one(struct iwl_mvm *mvm, u32 uid)
2082 {
2083         struct iwl_umac_scan_abort cmd = {
2084                 .hdr.size = cpu_to_le16(sizeof(struct iwl_umac_scan_abort) -
2085                                         sizeof(struct iwl_mvm_umac_cmd_hdr)),
2086                 .uid = cpu_to_le32(uid),
2087         };
2088
2089         lockdep_assert_held(&mvm->mutex);
2090
2091         IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid);
2092
2093         return iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_UMAC, 0, sizeof(cmd), &cmd);
2094 }
2095
2096 static int iwl_umac_scan_stop(struct iwl_mvm *mvm,
2097                               enum iwl_umac_scan_uid_type type, bool notify)
2098 {
2099         struct iwl_notification_wait wait_scan_done;
2100         static const u8 scan_done_notif[] = { SCAN_COMPLETE_UMAC, };
2101         struct iwl_umac_scan_done scan_done = {
2102                 .mvm = mvm,
2103                 .type = type,
2104         };
2105         int i, ret = -EIO;
2106
2107         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
2108                                    scan_done_notif,
2109                                    ARRAY_SIZE(scan_done_notif),
2110                                    iwl_scan_umac_done_check, &scan_done);
2111
2112         IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type);
2113
2114         for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) {
2115                 if (mvm->scan_uid[i] & type) {
2116                         int err;
2117
2118                         if (iwl_mvm_is_radio_killed(mvm) &&
2119                             (type & IWL_UMAC_SCAN_UID_REG_SCAN)) {
2120                                 ieee80211_scan_completed(mvm->hw, true);
2121                                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2122                                 break;
2123                         }
2124
2125                         err = iwl_umac_scan_abort_one(mvm, mvm->scan_uid[i]);
2126                         if (!err)
2127                                 ret = 0;
2128                 }
2129         }
2130
2131         if (ret) {
2132                 IWL_DEBUG_SCAN(mvm, "Couldn't stop scan\n");
2133                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
2134                 return ret;
2135         }
2136
2137         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
2138         if (ret)
2139                 return ret;
2140
2141         if (notify) {
2142                 if (type & IWL_UMAC_SCAN_UID_SCHED_SCAN)
2143                         ieee80211_sched_scan_stopped(mvm->hw);
2144                 if (type & IWL_UMAC_SCAN_UID_REG_SCAN) {
2145                         ieee80211_scan_completed(mvm->hw, true);
2146                         iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2147                 }
2148         }
2149
2150         return ret;
2151 }
2152
2153 int iwl_mvm_scan_size(struct iwl_mvm *mvm)
2154 {
2155         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2156                 return sizeof(struct iwl_scan_req_umac) +
2157                         sizeof(struct iwl_scan_channel_cfg_umac) *
2158                                 mvm->fw->ucode_capa.n_scan_channels +
2159                         sizeof(struct iwl_scan_req_umac_tail);
2160
2161         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2162                 return sizeof(struct iwl_scan_req_unified_lmac) +
2163                         sizeof(struct iwl_scan_channel_cfg_lmac) *
2164                                 mvm->fw->ucode_capa.n_scan_channels +
2165                         sizeof(struct iwl_scan_probe_req);
2166
2167         return sizeof(struct iwl_scan_cmd) +
2168                 mvm->fw->ucode_capa.max_probe_length +
2169                         mvm->fw->ucode_capa.n_scan_channels *
2170                 sizeof(struct iwl_scan_channel);
2171 }