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

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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
  76 struct iwl_mvm_scan_params {
  77         u32 max_out_time;
  78         u32 suspend_time;
  79         bool passive_fragmented;
  80         struct _dwell {
  81                 u16 passive;
  82                 u16 active;
  83         } dwell[IEEE80211_NUM_BANDS];
  84 };
  85
  86 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm)
  87 {
  88         u16 rx_chain;
  89         u8 rx_ant;
  90
  91         if (mvm->scan_rx_ant != ANT_NONE)
  92                 rx_ant = mvm->scan_rx_ant;
  93         else
  94                 rx_ant = mvm->fw->valid_rx_ant;
  95         rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS;
  96         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS;
  97         rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS;
  98         rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS;
  99         return cpu_to_le16(rx_chain);
 100 }
 101
 102 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band)
 103 {
 104         if (band == IEEE80211_BAND_2GHZ)
 105                 return cpu_to_le32(PHY_BAND_24);
 106         else
 107                 return cpu_to_le32(PHY_BAND_5);
 108 }
 109
 110 static inline __le32
 111 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band,
 112                           bool no_cck)
 113 {
 114         u32 tx_ant;
 115
 116         mvm->scan_last_antenna_idx =
 117                 iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant,
 118                                      mvm->scan_last_antenna_idx);
 119         tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS;
 120
 121         if (band == IEEE80211_BAND_2GHZ && !no_cck)
 122                 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK |
 123                                    tx_ant);
 124         else
 125                 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant);
 126 }
 127
 128 /*
 129  * We insert the SSIDs in an inverted order, because the FW will
 130  * invert it back. The most prioritized SSID, which is first in the
 131  * request list, is not copied here, but inserted directly to the probe
 132  * request.
 133  */
 134 static void iwl_mvm_scan_fill_ssids(struct iwl_ssid_ie *cmd_ssid,
 135                                     struct cfg80211_ssid *ssids,
 136                                     int n_ssids, int first)
 137 {
 138         int fw_idx, req_idx;
 139
 140         for (req_idx = n_ssids - 1, fw_idx = 0; req_idx >= first;
 141              req_idx--, fw_idx++) {
 142                 cmd_ssid[fw_idx].id = WLAN_EID_SSID;
 143                 cmd_ssid[fw_idx].len = ssids[req_idx].ssid_len;
 144                 memcpy(cmd_ssid[fw_idx].ssid,
 145                        ssids[req_idx].ssid,
 146                        ssids[req_idx].ssid_len);
 147         }
 148 }
 149
 150 /*
 151  * If req->n_ssids > 0, it means we should do an active scan.
 152  * In case of active scan w/o directed scan, we receive a zero-length SSID
 153  * just to notify that this scan is active and not passive.
 154  * In order to notify the FW of the number of SSIDs we wish to scan (including
 155  * the zero-length one), we need to set the corresponding bits in chan->type,
 156  * one for each SSID, and set the active bit (first). If the first SSID is
 157  * already included in the probe template, so we need to set only
 158  * req->n_ssids - 1 bits in addition to the first bit.
 159  */
 160 static u16 iwl_mvm_get_active_dwell(enum ieee80211_band band, int n_ssids)
 161 {
 162         if (band == IEEE80211_BAND_2GHZ)
 163                 return 20  + 3 * (n_ssids + 1);
 164         return 10  + 2 * (n_ssids + 1);
 165 }
 166
 167 static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band)
 168 {
 169         return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
 170 }
 171
 172 static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd,
 173                                        struct cfg80211_scan_request *req,
 174                                        bool basic_ssid,
 175                                        struct iwl_mvm_scan_params *params)
 176 {
 177         struct iwl_scan_channel *chan = (struct iwl_scan_channel *)
 178                 (cmd->data + le16_to_cpu(cmd->tx_cmd.len));
 179         int i;
 180         int type = BIT(req->n_ssids) - 1;
 181         enum ieee80211_band band = req->channels[0]->band;
 182
 183         if (!basic_ssid)
 184                 type |= BIT(req->n_ssids);
 185
 186         for (i = 0; i < cmd->channel_count; i++) {
 187                 chan->channel = cpu_to_le16(req->channels[i]->hw_value);
 188                 chan->type = cpu_to_le32(type);
 189                 if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR)
 190                         chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE);
 191                 chan->active_dwell = cpu_to_le16(params->dwell[band].active);
 192                 chan->passive_dwell = cpu_to_le16(params->dwell[band].passive);
 193                 chan->iteration_count = cpu_to_le16(1);
 194                 chan++;
 195         }
 196 }
 197
 198 /*
 199  * Fill in probe request with the following parameters:
 200  * TA is our vif HW address, which mac80211 ensures we have.
 201  * Packet is broadcasted, so this is both SA and DA.
 202  * The probe request IE is made out of two: first comes the most prioritized
 203  * SSID if a directed scan is requested. Second comes whatever extra
 204  * information was given to us as the scan request IE.
 205  */
 206 static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta,
 207                                   int n_ssids, const u8 *ssid, int ssid_len,
 208                                   const u8 *band_ie, int band_ie_len,
 209                                   const u8 *common_ie, int common_ie_len,
 210                                   int left)
 211 {
 212         int len = 0;
 213         u8 *pos = NULL;
 214
 215         /* Make sure there is enough space for the probe request,
 216          * two mandatory IEs and the data */
 217         left -= 24;
 218         if (left < 0)
 219                 return 0;
 220
 221         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
 222         eth_broadcast_addr(frame->da);
 223         memcpy(frame->sa, ta, ETH_ALEN);
 224         eth_broadcast_addr(frame->bssid);
 225         frame->seq_ctrl = 0;
 226
 227         len += 24;
 228
 229         /* for passive scans, no need to fill anything */
 230         if (n_ssids == 0)
 231                 return (u16)len;
 232
 233         /* points to the payload of the request */
 234         pos = &frame->u.probe_req.variable[0];
 235
 236         /* fill in our SSID IE */
 237         left -= ssid_len + 2;
 238         if (left < 0)
 239                 return 0;
 240         *pos++ = WLAN_EID_SSID;
 241         *pos++ = ssid_len;
 242         if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */
 243                 memcpy(pos, ssid, ssid_len);
 244                 pos += ssid_len;
 245         }
 246
 247         len += ssid_len + 2;
 248
 249         if (WARN_ON(left < band_ie_len + common_ie_len))
 250                 return len;
 251
 252         if (band_ie && band_ie_len) {
 253                 memcpy(pos, band_ie, band_ie_len);
 254                 pos += band_ie_len;
 255                 len += band_ie_len;
 256         }
 257
 258         if (common_ie && common_ie_len) {
 259                 memcpy(pos, common_ie, common_ie_len);
 260                 pos += common_ie_len;
 261                 len += common_ie_len;
 262         }
 263
 264         return (u16)len;
 265 }
 266
 267 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac,
 268                                             struct ieee80211_vif *vif)
 269 {
 270         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
 271         bool *global_bound = data;
 272
 273         if (mvmvif->phy_ctxt && mvmvif->phy_ctxt->id < MAX_PHYS)
 274                 *global_bound = true;
 275 }
 276
 277 static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
 278                                      struct ieee80211_vif *vif,
 279                                      int n_ssids, u32 flags,
 280                                      struct iwl_mvm_scan_params *params)
 281 {
 282         bool global_bound = false;
 283         enum ieee80211_band band;
 284         u8 frag_passive_dwell = 0;
 285
 286         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 287                                             IEEE80211_IFACE_ITER_NORMAL,
 288                                             iwl_mvm_scan_condition_iterator,
 289                                             &global_bound);
 290
 291         if (!global_bound)
 292                 goto not_bound;
 293
 294         params->suspend_time = 30;
 295         params->max_out_time = 170;
 296
 297         if (iwl_mvm_low_latency(mvm)) {
 298                 if (mvm->fw->ucode_capa.api[0] &
 299                     IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
 300                         params->suspend_time = 105;
 301                         params->max_out_time = 70;
 302                         frag_passive_dwell = 20;
 303                 } else {
 304                         params->suspend_time = 120;
 305                         params->max_out_time = 120;
 306                 }
 307         }
 308
 309         if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
 310                                    IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
 311                 /*
 312                  * P2P device scan should not be fragmented to avoid negative
 313                  * impact on P2P device discovery. Configure max_out_time to be
 314                  * equal to dwell time on passive channel. Take a longest
 315                  * possible value, one that corresponds to 2GHz band
 316                  */
 317                 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 318                         u32 passive_dwell =
 319                                 iwl_mvm_get_passive_dwell(IEEE80211_BAND_2GHZ);
 320                         params->max_out_time = passive_dwell;
 321                 } else {
 322                         params->passive_fragmented = true;
 323                 }
 324         }
 325
 326         if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
 327                 params->max_out_time = 200;
 328
 329 not_bound:
 330
 331         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
 332                 if (params->passive_fragmented)
 333                         params->dwell[band].passive = frag_passive_dwell;
 334                 else
 335                         params->dwell[band].passive =
 336                                 iwl_mvm_get_passive_dwell(band);
 337                 params->dwell[band].active = iwl_mvm_get_active_dwell(band,
 338                                                                       n_ssids);
 339         }
 340 }
 341
 342 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 343 {
 344         /* require rrm scan whenever the fw supports it */
 345         return mvm->fw->ucode_capa.capa[0] &
 346                IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
 347 }
 348
 349 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm,
 350                                            bool is_sched_scan)
 351 {
 352         int max_probe_len;
 353
 354         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 355                 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 356         else
 357                 max_probe_len = mvm->fw->ucode_capa.max_probe_length;
 358
 359         /* we create the 802.11 header and SSID element */
 360         max_probe_len -= 24 + 2;
 361
 362         /* basic ssid is added only for hw_scan with and old api */
 363         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) &&
 364             !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) &&
 365             !is_sched_scan)
 366                 max_probe_len -= 32;
 367
 368         return max_probe_len;
 369 }
 370
 371 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan)
 372 {
 373         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan);
 374
 375         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN))
 376                 return max_ie_len;
 377
 378         /* TODO: [BUG] This function should return the maximum allowed size of
 379          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 380          * in the same command. So the correct implementation of this function
 381          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 382          * command has only 512 bytes and it would leave us with about 240
 383          * bytes for scan IEs, which is clearly not enough. So meanwhile
 384          * we will report an incorrect value. This may result in a failure to
 385          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 386          * functions with -ENOBUFS, if a large enough probe will be provided.
 387          */
 388         return max_ie_len;
 389 }
 390
 391 int iwl_mvm_scan_request(struct iwl_mvm *mvm,
 392                          struct ieee80211_vif *vif,
 393                          struct cfg80211_scan_request *req)
 394 {
 395         struct iwl_host_cmd hcmd = {
 396                 .id = SCAN_REQUEST_CMD,
 397                 .len = { 0, },
 398                 .data = { mvm->scan_cmd, },
 399                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 400         };
 401         struct iwl_scan_cmd *cmd = mvm->scan_cmd;
 402         int ret;
 403         u32 status;
 404         int ssid_len = 0;
 405         u8 *ssid = NULL;
 406         bool basic_ssid = !(mvm->fw->ucode_capa.flags &
 407                            IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
 408         struct iwl_mvm_scan_params params = {};
 409
 410         lockdep_assert_held(&mvm->mutex);
 411
 412         /* we should have failed registration if scan_cmd was NULL */
 413         if (WARN_ON(mvm->scan_cmd == NULL))
 414                 return -ENOMEM;
 415
 416         IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
 417         mvm->scan_status = IWL_MVM_SCAN_OS;
 418         memset(cmd, 0, ksize(cmd));
 419
 420         cmd->channel_count = (u8)req->n_channels;
 421         cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
 422         cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
 423         cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
 424
 425         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, &params);
 426         cmd->max_out_time = cpu_to_le32(params.max_out_time);
 427         cmd->suspend_time = cpu_to_le32(params.suspend_time);
 428         if (params.passive_fragmented)
 429                 cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
 430
 431         cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
 432         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 433                                         MAC_FILTER_IN_BEACON);
 434
 435         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 436                 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
 437         else
 438                 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
 439
 440         cmd->repeats = cpu_to_le32(1);
 441
 442         /*
 443          * If the user asked for passive scan, don't change to active scan if
 444          * you see any activity on the channel - remain passive.
 445          */
 446         if (req->n_ssids > 0) {
 447                 cmd->passive2active = cpu_to_le16(1);
 448                 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
 449                 if (basic_ssid) {
 450                         ssid = req->ssids[0].ssid;
 451                         ssid_len = req->ssids[0].ssid_len;
 452                 }
 453         } else {
 454                 cmd->passive2active = 0;
 455                 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
 456         }
 457
 458         iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids,
 459                                 basic_ssid ? 1 : 0);
 460
 461         cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 462                                            TX_CMD_FLG_BT_DIS);
 463         cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
 464         cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 465         cmd->tx_cmd.rate_n_flags =
 466                         iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
 467                                                   req->no_cck);
 468
 469         cmd->tx_cmd.len =
 470                 cpu_to_le16(iwl_mvm_fill_probe_req(
 471                             (struct ieee80211_mgmt *)cmd->data,
 472                             vif->addr,
 473                             req->n_ssids, ssid, ssid_len,
 474                             req->ie, req->ie_len, NULL, 0,
 475                             mvm->fw->ucode_capa.max_probe_length));
 476
 477         iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, &params);
 478
 479         cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
 480                 le16_to_cpu(cmd->tx_cmd.len) +
 481                 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
 482         hcmd.len[0] = le16_to_cpu(cmd->len);
 483
 484         status = SCAN_RESPONSE_OK;
 485         ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
 486         if (!ret && status == SCAN_RESPONSE_OK) {
 487                 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
 488         } else {
 489                 /*
 490                  * If the scan failed, it usually means that the FW was unable
 491                  * to allocate the time events. Warn on it, but maybe we
 492                  * should try to send the command again with different params.
 493                  */
 494                 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
 495                         status, ret);
 496                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 497                 ret = -EIO;
 498         }
 499         return ret;
 500 }
 501
 502 int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 503                           struct iwl_device_cmd *cmd)
 504 {
 505         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 506         struct iwl_cmd_response *resp = (void *)pkt->data;
 507
 508         IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
 509                        le32_to_cpu(resp->status));
 510         return 0;
 511 }
 512
 513 int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 514                           struct iwl_device_cmd *cmd)
 515 {
 516         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 517         struct iwl_scan_complete_notif *notif = (void *)pkt->data;
 518
 519         lockdep_assert_held(&mvm->mutex);
 520
 521         IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
 522                        notif->status, notif->scanned_channels);
 523
 524         if (mvm->scan_status == IWL_MVM_SCAN_OS)
 525                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 526         ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
 527
 528         iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 529
 530         return 0;
 531 }
 532
 533 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
 534                                     struct iwl_rx_cmd_buffer *rxb,
 535                                     struct iwl_device_cmd *cmd)
 536 {
 537         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 538         u8 client_bitmap = 0;
 539
 540         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
 541                 struct iwl_sched_scan_results *notif = (void *)pkt->data;
 542
 543                 client_bitmap = notif->client_bitmap;
 544         }
 545
 546         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
 547             client_bitmap & SCAN_CLIENT_SCHED_SCAN) {
 548                 if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
 549                         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 550                         ieee80211_sched_scan_results(mvm->hw);
 551                 } else {
 552                         IWL_DEBUG_SCAN(mvm, "Scan results\n");
 553                 }
 554         }
 555
 556         return 0;
 557 }
 558
 559 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
 560                                      struct iwl_rx_packet *pkt, void *data)
 561 {
 562         struct iwl_mvm *mvm =
 563                 container_of(notif_wait, struct iwl_mvm, notif_wait);
 564         struct iwl_scan_complete_notif *notif;
 565         u32 *resp;
 566
 567         switch (pkt->hdr.cmd) {
 568         case SCAN_ABORT_CMD:
 569                 resp = (void *)pkt->data;
 570                 if (*resp == CAN_ABORT_STATUS) {
 571                         IWL_DEBUG_SCAN(mvm,
 572                                        "Scan can be aborted, wait until completion\n");
 573                         return false;
 574                 }
 575
 576                 /*
 577                  * If scan cannot be aborted, it means that we had a
 578                  * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
 579                  * ieee80211_scan_completed already.
 580                  */
 581                 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
 582                                *resp);
 583                 return true;
 584
 585         case SCAN_COMPLETE_NOTIFICATION:
 586                 notif = (void *)pkt->data;
 587                 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
 588                                notif->status);
 589                 return true;
 590
 591         default:
 592                 WARN_ON(1);
 593                 return false;
 594         };
 595 }
 596
 597 static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm)
 598 {
 599         struct iwl_notification_wait wait_scan_abort;
 600         static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
 601                                                SCAN_COMPLETE_NOTIFICATION };
 602         int ret;
 603
 604         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
 605                 return 0;
 606
 607         if (iwl_mvm_is_radio_killed(mvm)) {
 608                 ieee80211_scan_completed(mvm->hw, true);
 609                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 610                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 611                 return 0;
 612         }
 613
 614         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
 615                                    scan_abort_notif,
 616                                    ARRAY_SIZE(scan_abort_notif),
 617                                    iwl_mvm_scan_abort_notif, NULL);
 618
 619         ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
 620         if (ret) {
 621                 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
 622                 /* mac80211's state will be cleaned in the nic_restart flow */
 623                 goto out_remove_notif;
 624         }
 625
 626         return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
 627
 628 out_remove_notif:
 629         iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
 630         return ret;
 631 }
 632
 633 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
 634                                            struct iwl_rx_cmd_buffer *rxb,
 635                                            struct iwl_device_cmd *cmd)
 636 {
 637         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 638         u8 status, ebs_status;
 639
 640         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
 641                 struct iwl_periodic_scan_complete *scan_notif;
 642
 643                 scan_notif = (void *)pkt->data;
 644                 status = scan_notif->status;
 645                 ebs_status = scan_notif->ebs_status;
 646         } else  {
 647                 struct iwl_scan_offload_complete *scan_notif;
 648
 649                 scan_notif = (void *)pkt->data;
 650                 status = scan_notif->status;
 651                 ebs_status = scan_notif->ebs_status;
 652         }
 653         /* scan status must be locked for proper checking */
 654         lockdep_assert_held(&mvm->mutex);
 655
 656         IWL_DEBUG_SCAN(mvm,
 657                        "%s completed, status %s, EBS status %s\n",
 658                        mvm->scan_status == IWL_MVM_SCAN_SCHED ?
 659                                 "Scheduled scan" : "Scan",
 660                        status == IWL_SCAN_OFFLOAD_COMPLETED ?
 661                                 "completed" : "aborted",
 662                        ebs_status == IWL_SCAN_EBS_SUCCESS ?
 663                                 "success" : "failed");
 664
 665
 666         /* only call mac80211 completion if the stop was initiated by FW */
 667         if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
 668                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 669                 ieee80211_sched_scan_stopped(mvm->hw);
 670         } else if (mvm->scan_status == IWL_MVM_SCAN_OS) {
 671                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 672                 ieee80211_scan_completed(mvm->hw,
 673                                          status == IWL_SCAN_OFFLOAD_ABORTED);
 674         }
 675
 676         mvm->last_ebs_successful = !ebs_status;
 677
 678         return 0;
 679 }
 680
 681 static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
 682                                           struct ieee80211_vif *vif,
 683                                           struct ieee80211_scan_ies *ies,
 684                                           enum ieee80211_band band,
 685                                           struct iwl_tx_cmd *cmd,
 686                                           u8 *data)
 687 {
 688         u16 cmd_len;
 689
 690         cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
 691         cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 692         cmd->sta_id = mvm->aux_sta.sta_id;
 693
 694         cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
 695
 696         cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
 697                                          vif->addr,
 698                                          1, NULL, 0,
 699                                          ies->ies[band], ies->len[band],
 700                                          ies->common_ies, ies->common_ie_len,
 701                                          SCAN_OFFLOAD_PROBE_REQ_SIZE);
 702         cmd->len = cpu_to_le16(cmd_len);
 703 }
 704
 705 static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
 706                                struct ieee80211_vif *vif,
 707                                struct cfg80211_sched_scan_request *req,
 708                                struct iwl_scan_offload_cmd *scan,
 709                                struct iwl_mvm_scan_params *params)
 710 {
 711         scan->channel_count = req->n_channels;
 712         scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
 713         scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
 714         scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
 715         scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
 716
 717         scan->max_out_time = cpu_to_le32(params->max_out_time);
 718         scan->suspend_time = cpu_to_le32(params->suspend_time);
 719
 720         scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 721                                           MAC_FILTER_IN_BEACON);
 722         scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
 723         scan->rep_count = cpu_to_le32(1);
 724
 725         if (params->passive_fragmented)
 726                 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
 727 }
 728
 729 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 730 {
 731         int i;
 732
 733         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 734                 if (!ssid_list[i].len)
 735                         break;
 736                 if (ssid_list[i].len == ssid_len &&
 737                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 738                         return i;
 739         }
 740         return -1;
 741 }
 742
 743 static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
 744                                         struct iwl_ssid_ie *direct_scan,
 745                                         u32 *ssid_bitmap, bool basic_ssid)
 746 {
 747         int i, j;
 748         int index;
 749
 750         /*
 751          * copy SSIDs from match list.
 752          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 753          * config match list.
 754          */
 755         for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
 756                 /* skip empty SSID matchsets */
 757                 if (!req->match_sets[i].ssid.ssid_len)
 758                         continue;
 759                 direct_scan[i].id = WLAN_EID_SSID;
 760                 direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
 761                 memcpy(direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
 762                        direct_scan[i].len);
 763         }
 764
 765         /* add SSIDs from scan SSID list */
 766         *ssid_bitmap = 0;
 767         for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
 768                 index = iwl_ssid_exist(req->ssids[j].ssid,
 769                                        req->ssids[j].ssid_len,
 770                                        direct_scan);
 771                 if (index < 0) {
 772                         if (!req->ssids[j].ssid_len && basic_ssid)
 773                                 continue;
 774                         direct_scan[i].id = WLAN_EID_SSID;
 775                         direct_scan[i].len = req->ssids[j].ssid_len;
 776                         memcpy(direct_scan[i].ssid, req->ssids[j].ssid,
 777                                direct_scan[i].len);
 778                         *ssid_bitmap |= BIT(i + 1);
 779                         i++;
 780                 } else {
 781                         *ssid_bitmap |= BIT(index + 1);
 782                 }
 783         }
 784 }
 785
 786 static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
 787                                   struct cfg80211_sched_scan_request *req,
 788                                   u8 *channels_buffer,
 789                                   enum ieee80211_band band,
 790                                   int *head,
 791                                   u32 ssid_bitmap,
 792                                   struct iwl_mvm_scan_params *params)
 793 {
 794         u32 n_channels = mvm->fw->ucode_capa.n_scan_channels;
 795         __le32 *type = (__le32 *)channels_buffer;
 796         __le16 *channel_number = (__le16 *)(type + n_channels);
 797         __le16 *iter_count = channel_number + n_channels;
 798         __le32 *iter_interval = (__le32 *)(iter_count + n_channels);
 799         u8 *active_dwell = (u8 *)(iter_interval + n_channels);
 800         u8 *passive_dwell = active_dwell + n_channels;
 801         int i, index = 0;
 802
 803         for (i = 0; i < req->n_channels; i++) {
 804                 struct ieee80211_channel *chan = req->channels[i];
 805
 806                 if (chan->band != band)
 807                         continue;
 808
 809                 index = *head;
 810                 (*head)++;
 811
 812                 channel_number[index] = cpu_to_le16(chan->hw_value);
 813                 active_dwell[index] = params->dwell[band].active;
 814                 passive_dwell[index] = params->dwell[band].passive;
 815
 816                 iter_count[index] = cpu_to_le16(1);
 817                 iter_interval[index] = 0;
 818
 819                 if (!(chan->flags & IEEE80211_CHAN_NO_IR))
 820                         type[index] |=
 821                                 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
 822
 823                 type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL |
 824                                            IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
 825
 826                 if (chan->flags & IEEE80211_CHAN_NO_HT40)
 827                         type[index] |=
 828                                 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
 829
 830                 /* scan for all SSIDs from req->ssids */
 831                 type[index] |= cpu_to_le32(ssid_bitmap);
 832         }
 833 }
 834
 835 int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
 836                               struct ieee80211_vif *vif,
 837                               struct cfg80211_sched_scan_request *req,
 838                               struct ieee80211_scan_ies *ies)
 839 {
 840         int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
 841         int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
 842         int head = 0;
 843         u32 ssid_bitmap;
 844         int cmd_len;
 845         int ret;
 846         u8 *probes;
 847         bool basic_ssid = !(mvm->fw->ucode_capa.flags &
 848                             IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
 849
 850         struct iwl_scan_offload_cfg *scan_cfg;
 851         struct iwl_host_cmd cmd = {
 852                 .id = SCAN_OFFLOAD_CONFIG_CMD,
 853         };
 854         struct iwl_mvm_scan_params params = {};
 855
 856         lockdep_assert_held(&mvm->mutex);
 857
 858         cmd_len = sizeof(struct iwl_scan_offload_cfg) +
 859                   mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE +
 860                   2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
 861
 862         scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
 863         if (!scan_cfg)
 864                 return -ENOMEM;
 865
 866         probes = scan_cfg->data +
 867                 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE;
 868
 869         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
 870         iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, &params);
 871         scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
 872
 873         iwl_scan_offload_build_ssid(req, scan_cfg->scan_cmd.direct_scan,
 874                                     &ssid_bitmap, basic_ssid);
 875         /* build tx frames for supported bands */
 876         if (band_2ghz) {
 877                 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
 878                                               IEEE80211_BAND_2GHZ,
 879                                               &scan_cfg->scan_cmd.tx_cmd[0],
 880                                               probes);
 881                 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
 882                                       IEEE80211_BAND_2GHZ, &head,
 883                                       ssid_bitmap, &params);
 884         }
 885         if (band_5ghz) {
 886                 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
 887                                               IEEE80211_BAND_5GHZ,
 888                                               &scan_cfg->scan_cmd.tx_cmd[1],
 889                                               probes +
 890                                                 SCAN_OFFLOAD_PROBE_REQ_SIZE);
 891                 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
 892                                       IEEE80211_BAND_5GHZ, &head,
 893                                       ssid_bitmap, &params);
 894         }
 895
 896         cmd.data[0] = scan_cfg;
 897         cmd.len[0] = cmd_len;
 898         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 899
 900         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
 901
 902         ret = iwl_mvm_send_cmd(mvm, &cmd);
 903         kfree(scan_cfg);
 904         return ret;
 905 }
 906
 907 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 908                                        struct cfg80211_sched_scan_request *req)
 909 {
 910         struct iwl_scan_offload_profile *profile;
 911         struct iwl_scan_offload_profile_cfg *profile_cfg;
 912         struct iwl_scan_offload_blacklist *blacklist;
 913         struct iwl_host_cmd cmd = {
 914                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 915                 .len[1] = sizeof(*profile_cfg),
 916                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 917                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 918         };
 919         int blacklist_len;
 920         int i;
 921         int ret;
 922
 923         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 924                         return -EIO;
 925
 926         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 927                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 928         else
 929                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 930
 931         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 932         if (!blacklist)
 933                 return -ENOMEM;
 934
 935         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 936         if (!profile_cfg) {
 937                 ret = -ENOMEM;
 938                 goto free_blacklist;
 939         }
 940
 941         cmd.data[0] = blacklist;
 942         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 943         cmd.data[1] = profile_cfg;
 944
 945         /* No blacklist configuration */
 946
 947         profile_cfg->num_profiles = req->n_match_sets;
 948         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 949         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 950         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 951         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 952                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 953
 954         for (i = 0; i < req->n_match_sets; i++) {
 955                 profile = &profile_cfg->profiles[i];
 956                 profile->ssid_index = i;
 957                 /* Support any cipher and auth algorithm */
 958                 profile->unicast_cipher = 0xff;
 959                 profile->auth_alg = 0xff;
 960                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 961                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 962                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 963         }
 964
 965         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 966
 967         ret = iwl_mvm_send_cmd(mvm, &cmd);
 968         kfree(profile_cfg);
 969 free_blacklist:
 970         kfree(blacklist);
 971
 972         return ret;
 973 }
 974
 975 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
 976                              struct cfg80211_sched_scan_request *req)
 977 {
 978         struct iwl_scan_offload_req scan_req = {
 979                 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
 980
 981                 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
 982                 .schedule_line[0].delay = cpu_to_le16(req->interval / 1000),
 983                 .schedule_line[0].full_scan_mul = 1,
 984
 985                 .schedule_line[1].iterations = 0xff,
 986                 .schedule_line[1].delay = cpu_to_le16(req->interval / 1000),
 987                 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
 988         };
 989
 990         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 991                 IWL_DEBUG_SCAN(mvm,
 992                                "Sending scheduled scan with filtering, filter len %d\n",
 993                                req->n_match_sets);
 994         } else {
 995                 IWL_DEBUG_SCAN(mvm,
 996                                "Sending Scheduled scan without filtering\n");
 997                 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
 998         }
 999
1000         if (mvm->last_ebs_successful &&
1001             mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
1002                 scan_req.flags |=
1003                         cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
1004
1005         return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
1006                                     sizeof(scan_req), &scan_req);
1007 }
1008
1009 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
1010 {
1011         int ret;
1012         struct iwl_host_cmd cmd = {
1013                 .id = SCAN_OFFLOAD_ABORT_CMD,
1014         };
1015         u32 status;
1016
1017         /* Exit instantly with error when device is not ready
1018          * to receive scan abort command or it does not perform
1019          * scheduled scan currently */
1020         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1021             (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1022              mvm->scan_status != IWL_MVM_SCAN_OS))
1023                 return -EIO;
1024
1025         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
1026         if (ret)
1027                 return ret;
1028
1029         if (status != CAN_ABORT_STATUS) {
1030                 /*
1031                  * The scan abort will return 1 for success or
1032                  * 2 for "failure".  A failure condition can be
1033                  * due to simply not being in an active scan which
1034                  * can occur if we send the scan abort before the
1035                  * microcode has notified us that a scan is completed.
1036                  */
1037                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
1038                 ret = -ENOENT;
1039         }
1040
1041         return ret;
1042 }
1043
1044 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
1045 {
1046         int ret;
1047         struct iwl_notification_wait wait_scan_done;
1048         static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
1049         bool sched = mvm->scan_status == IWL_MVM_SCAN_SCHED;
1050
1051         lockdep_assert_held(&mvm->mutex);
1052
1053         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1054             (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1055              mvm->scan_status != IWL_MVM_SCAN_OS)) {
1056                 IWL_DEBUG_SCAN(mvm, "No scan to stop\n");
1057                 return 0;
1058         }
1059
1060         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1061                                    scan_done_notif,
1062                                    ARRAY_SIZE(scan_done_notif),
1063                                    NULL, NULL);
1064
1065         ret = iwl_mvm_send_scan_offload_abort(mvm);
1066         if (ret) {
1067                 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
1068                                sched ? "offloaded " : "", ret);
1069                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1070                 return ret;
1071         }
1072
1073         IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
1074                        sched ? "offloaded " : "");
1075
1076         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1077         if (ret)
1078                 return ret;
1079
1080         /*
1081          * Clear the scan status so the next scan requests will succeed. This
1082          * also ensures the Rx handler doesn't do anything, as the scan was
1083          * stopped from above.
1084          */
1085         mvm->scan_status = IWL_MVM_SCAN_NONE;
1086
1087         if (notify) {
1088                 if (sched)
1089                         ieee80211_sched_scan_stopped(mvm->hw);
1090                 else
1091                         ieee80211_scan_completed(mvm->hw, true);
1092         }
1093
1094         return 0;
1095 }
1096
1097 static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm *mvm,
1098                                              struct iwl_scan_req_tx_cmd *tx_cmd,
1099                                              bool no_cck)
1100 {
1101         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1102                                          TX_CMD_FLG_BT_DIS);
1103         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1104                                                            IEEE80211_BAND_2GHZ,
1105                                                            no_cck);
1106         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
1107
1108         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1109                                          TX_CMD_FLG_BT_DIS);
1110         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1111                                                            IEEE80211_BAND_5GHZ,
1112                                                            no_cck);
1113         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
1114 }
1115
1116 static void
1117 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
1118                                struct ieee80211_channel **channels,
1119                                int n_channels, u32 ssid_bitmap,
1120                                struct iwl_scan_req_unified_lmac *cmd)
1121 {
1122         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
1123         int i;
1124
1125         for (i = 0; i < n_channels; i++) {
1126                 channel_cfg[i].channel_num =
1127                         cpu_to_le16(channels[i]->hw_value);
1128                 channel_cfg[i].iter_count = cpu_to_le16(1);
1129                 channel_cfg[i].iter_interval = 0;
1130                 channel_cfg[i].flags =
1131                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
1132                                     ssid_bitmap);
1133         }
1134 }
1135
1136 static void
1137 iwl_mvm_build_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1138                                  struct ieee80211_scan_ies *ies,
1139                                  struct iwl_scan_req_unified_lmac *cmd)
1140 {
1141         struct iwl_scan_probe_req *preq = (void *)(cmd->data +
1142                 sizeof(struct iwl_scan_channel_cfg_lmac) *
1143                         mvm->fw->ucode_capa.n_scan_channels);
1144         struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
1145         u8 *pos;
1146
1147         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1148         eth_broadcast_addr(frame->da);
1149         memcpy(frame->sa, vif->addr, ETH_ALEN);
1150         eth_broadcast_addr(frame->bssid);
1151         frame->seq_ctrl = 0;
1152
1153         pos = frame->u.probe_req.variable;
1154         *pos++ = WLAN_EID_SSID;
1155         *pos++ = 0;
1156
1157         preq->mac_header.offset = 0;
1158         preq->mac_header.len = cpu_to_le16(24 + 2);
1159
1160         memcpy(pos, ies->ies[IEEE80211_BAND_2GHZ],
1161                ies->len[IEEE80211_BAND_2GHZ]);
1162         preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
1163         preq->band_data[0].len = cpu_to_le16(ies->len[IEEE80211_BAND_2GHZ]);
1164         pos += ies->len[IEEE80211_BAND_2GHZ];
1165
1166         memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
1167                ies->len[IEEE80211_BAND_5GHZ]);
1168         preq->band_data[1].offset = cpu_to_le16(pos - preq->buf);
1169         preq->band_data[1].len = cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
1170         pos += ies->len[IEEE80211_BAND_5GHZ];
1171
1172         memcpy(pos, ies->common_ies, ies->common_ie_len);
1173         preq->common_data.offset = cpu_to_le16(pos - preq->buf);
1174         preq->common_data.len = cpu_to_le16(ies->common_ie_len);
1175 }
1176
1177 static void
1178 iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
1179                                        struct iwl_scan_req_unified_lmac *cmd,
1180                                        struct iwl_mvm_scan_params *params)
1181 {
1182         memset(cmd, 0, ksize(cmd));
1183         cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1184         cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1185         if (params->passive_fragmented)
1186                 cmd->fragmented_dwell =
1187                                 params->dwell[IEEE80211_BAND_2GHZ].passive;
1188         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
1189         cmd->max_out_time = cpu_to_le32(params->max_out_time);
1190         cmd->suspend_time = cpu_to_le32(params->suspend_time);
1191         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1192         cmd->iter_num = cpu_to_le32(1);
1193
1194         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1195             mvm->last_ebs_successful) {
1196                 cmd->channel_opt[0].flags =
1197                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1198                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1199                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1200                 cmd->channel_opt[1].flags =
1201                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1202                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1203                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1204         }
1205
1206         if (iwl_mvm_rrm_scan_needed(mvm))
1207                 cmd->scan_flags |=
1208                         cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
1209 }
1210
1211 int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
1212                               struct ieee80211_vif *vif,
1213                               struct ieee80211_scan_request *req)
1214 {
1215         struct iwl_host_cmd hcmd = {
1216                 .id = SCAN_OFFLOAD_REQUEST_CMD,
1217                 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1218                          sizeof(struct iwl_scan_channel_cfg_lmac) *
1219                                 mvm->fw->ucode_capa.n_scan_channels +
1220                          sizeof(struct iwl_scan_probe_req), },
1221                 .data = { mvm->scan_cmd, },
1222                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1223         };
1224         struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1225         struct iwl_mvm_scan_params params = {};
1226         u32 flags;
1227         int ssid_bitmap = 0;
1228         int ret, i;
1229
1230         lockdep_assert_held(&mvm->mutex);
1231
1232         /* we should have failed registration if scan_cmd was NULL */
1233         if (WARN_ON(mvm->scan_cmd == NULL))
1234                 return -ENOMEM;
1235
1236         if (req->req.n_ssids > PROBE_OPTION_MAX ||
1237             req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] +
1238             req->ies.len[NL80211_BAND_5GHZ] >
1239                 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) ||
1240             req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
1241                 return -ENOBUFS;
1242
1243         mvm->scan_status = IWL_MVM_SCAN_OS;
1244
1245         iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1246                                  &params);
1247
1248         iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1249
1250         cmd->n_channels = (u8)req->req.n_channels;
1251
1252         flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1253
1254         if (req->req.n_ssids == 1 && req->req.ssids[0].ssid_len != 0)
1255                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1256
1257         if (params.passive_fragmented)
1258                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1259
1260         if (req->req.n_ssids == 0)
1261                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1262
1263         cmd->scan_flags |= cpu_to_le32(flags);
1264
1265         cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band);
1266         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1267                                         MAC_FILTER_IN_BEACON);
1268         iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, req->req.no_cck);
1269         iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->req.ssids,
1270                                 req->req.n_ssids, 0);
1271
1272         cmd->schedule[0].delay = 0;
1273         cmd->schedule[0].iterations = 1;
1274         cmd->schedule[0].full_scan_mul = 0;
1275         cmd->schedule[1].delay = 0;
1276         cmd->schedule[1].iterations = 0;
1277         cmd->schedule[1].full_scan_mul = 0;
1278
1279         for (i = 1; i <= req->req.n_ssids; i++)
1280                 ssid_bitmap |= BIT(i);
1281
1282         iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels,
1283                                        req->req.n_channels, ssid_bitmap,
1284                                        cmd);
1285
1286         iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, cmd);
1287
1288         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1289         if (!ret) {
1290                 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1291         } else {
1292                 /*
1293                  * If the scan failed, it usually means that the FW was unable
1294                  * to allocate the time events. Warn on it, but maybe we
1295                  * should try to send the command again with different params.
1296                  */
1297                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1298                 mvm->scan_status = IWL_MVM_SCAN_NONE;
1299                 ret = -EIO;
1300         }
1301         return ret;
1302 }
1303
1304 int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
1305                                     struct ieee80211_vif *vif,
1306                                     struct cfg80211_sched_scan_request *req,
1307                                     struct ieee80211_scan_ies *ies)
1308 {
1309         struct iwl_host_cmd hcmd = {
1310                 .id = SCAN_OFFLOAD_REQUEST_CMD,
1311                 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1312                          sizeof(struct iwl_scan_channel_cfg_lmac) *
1313                                 mvm->fw->ucode_capa.n_scan_channels +
1314                          sizeof(struct iwl_scan_probe_req), },
1315                 .data = { mvm->scan_cmd, },
1316                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1317         };
1318         struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1319         struct iwl_mvm_scan_params params = {};
1320         int ret;
1321         u32 flags = 0, ssid_bitmap = 0;
1322
1323         lockdep_assert_held(&mvm->mutex);
1324
1325         /* we should have failed registration if scan_cmd was NULL */
1326         if (WARN_ON(mvm->scan_cmd == NULL))
1327                 return -ENOMEM;
1328
1329         if (req->n_ssids > PROBE_OPTION_MAX ||
1330             ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1331             ies->len[NL80211_BAND_5GHZ] >
1332                 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) ||
1333             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1334                 return -ENOBUFS;
1335
1336         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
1337
1338         iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1339
1340         cmd->n_channels = (u8)req->n_channels;
1341
1342         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
1343                 IWL_DEBUG_SCAN(mvm,
1344                                "Sending scheduled scan with filtering, n_match_sets %d\n",
1345                                req->n_match_sets);
1346         } else {
1347                 IWL_DEBUG_SCAN(mvm,
1348                                "Sending Scheduled scan without filtering\n");
1349                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1350         }
1351
1352         if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0)
1353                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1354
1355         if (params.passive_fragmented)
1356                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1357
1358         if (req->n_ssids == 0)
1359                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1360
1361         cmd->scan_flags |= cpu_to_le32(flags);
1362
1363         cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
1364         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1365                                         MAC_FILTER_IN_BEACON);
1366         iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, false);
1367         iwl_scan_offload_build_ssid(req, cmd->direct_scan, &ssid_bitmap, false);
1368
1369         cmd->schedule[0].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1370         cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1371         cmd->schedule[0].full_scan_mul = 1;
1372
1373         cmd->schedule[1].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1374         cmd->schedule[1].iterations = 0xff;
1375         cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1376
1377         iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1378                                        ssid_bitmap, cmd);
1379
1380         iwl_mvm_build_unified_scan_probe(mvm, vif, ies, cmd);
1381
1382         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1383         if (!ret) {
1384                 IWL_DEBUG_SCAN(mvm,
1385                                "Sched scan request was sent successfully\n");
1386         } else {
1387                 /*
1388                  * If the scan failed, it usually means that the FW was unable
1389                  * to allocate the time events. Warn on it, but maybe we
1390                  * should try to send the command again with different params.
1391                  */
1392                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1393                 mvm->scan_status = IWL_MVM_SCAN_NONE;
1394                 ret = -EIO;
1395         }
1396         return ret;
1397 }
1398
1399
1400 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
1401 {
1402         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1403                 return iwl_mvm_scan_offload_stop(mvm, true);
1404         return iwl_mvm_cancel_regular_scan(mvm);
1405 }