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 (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt &&
 274             mvmvif->phy_ctxt->id < MAX_PHYS)
 275                 *global_bound = true;
 276 }
 277
 278 static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm,
 279                                      struct ieee80211_vif *vif,
 280                                      int n_ssids, u32 flags,
 281                                      struct iwl_mvm_scan_params *params)
 282 {
 283         bool global_bound = false;
 284         enum ieee80211_band band;
 285         u8 frag_passive_dwell = 0;
 286
 287         ieee80211_iterate_active_interfaces_atomic(mvm->hw,
 288                                             IEEE80211_IFACE_ITER_NORMAL,
 289                                             iwl_mvm_scan_condition_iterator,
 290                                             &global_bound);
 291
 292         if (!global_bound)
 293                 goto not_bound;
 294
 295         params->suspend_time = 30;
 296         params->max_out_time = 170;
 297
 298         if (iwl_mvm_low_latency(mvm)) {
 299                 if (mvm->fw->ucode_capa.api[0] &
 300                     IWL_UCODE_TLV_API_FRAGMENTED_SCAN) {
 301                         params->suspend_time = 105;
 302                         params->max_out_time = 70;
 303                         frag_passive_dwell = 20;
 304                 } else {
 305                         params->suspend_time = 120;
 306                         params->max_out_time = 120;
 307                 }
 308         }
 309
 310         if (frag_passive_dwell && (mvm->fw->ucode_capa.api[0] &
 311                                    IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) {
 312                 /*
 313                  * P2P device scan should not be fragmented to avoid negative
 314                  * impact on P2P device discovery. Configure max_out_time to be
 315                  * equal to dwell time on passive channel. Take a longest
 316                  * possible value, one that corresponds to 2GHz band
 317                  */
 318                 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
 319                         u32 passive_dwell =
 320                                 iwl_mvm_get_passive_dwell(IEEE80211_BAND_2GHZ);
 321                         params->max_out_time = passive_dwell;
 322                 } else {
 323                         params->passive_fragmented = true;
 324                 }
 325         }
 326
 327         if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY)
 328                 params->max_out_time = 200;
 329
 330 not_bound:
 331
 332         for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) {
 333                 if (params->passive_fragmented)
 334                         params->dwell[band].passive = frag_passive_dwell;
 335                 else
 336                         params->dwell[band].passive =
 337                                 iwl_mvm_get_passive_dwell(band);
 338                 params->dwell[band].active = iwl_mvm_get_active_dwell(band,
 339                                                                       n_ssids);
 340         }
 341 }
 342
 343 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm)
 344 {
 345         /* require rrm scan whenever the fw supports it */
 346         return mvm->fw->ucode_capa.capa[0] &
 347                IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT;
 348 }
 349
 350 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm,
 351                                            bool is_sched_scan)
 352 {
 353         int max_probe_len;
 354
 355         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
 356                 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE;
 357         else
 358                 max_probe_len = mvm->fw->ucode_capa.max_probe_length;
 359
 360         /* we create the 802.11 header and SSID element */
 361         max_probe_len -= 24 + 2;
 362
 363         /* basic ssid is added only for hw_scan with and old api */
 364         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID) &&
 365             !(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) &&
 366             !is_sched_scan)
 367                 max_probe_len -= 32;
 368
 369         return max_probe_len;
 370 }
 371
 372 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm, bool is_sched_scan)
 373 {
 374         int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm, is_sched_scan);
 375
 376         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN))
 377                 return max_ie_len;
 378
 379         /* TODO: [BUG] This function should return the maximum allowed size of
 380          * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs
 381          * in the same command. So the correct implementation of this function
 382          * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan
 383          * command has only 512 bytes and it would leave us with about 240
 384          * bytes for scan IEs, which is clearly not enough. So meanwhile
 385          * we will report an incorrect value. This may result in a failure to
 386          * issue a scan in unified_scan_lmac and unified_sched_scan_lmac
 387          * functions with -ENOBUFS, if a large enough probe will be provided.
 388          */
 389         return max_ie_len;
 390 }
 391
 392 int iwl_mvm_scan_request(struct iwl_mvm *mvm,
 393                          struct ieee80211_vif *vif,
 394                          struct cfg80211_scan_request *req)
 395 {
 396         struct iwl_host_cmd hcmd = {
 397                 .id = SCAN_REQUEST_CMD,
 398                 .len = { 0, },
 399                 .data = { mvm->scan_cmd, },
 400                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
 401         };
 402         struct iwl_scan_cmd *cmd = mvm->scan_cmd;
 403         int ret;
 404         u32 status;
 405         int ssid_len = 0;
 406         u8 *ssid = NULL;
 407         bool basic_ssid = !(mvm->fw->ucode_capa.flags &
 408                            IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
 409         struct iwl_mvm_scan_params params = {};
 410
 411         lockdep_assert_held(&mvm->mutex);
 412
 413         /* we should have failed registration if scan_cmd was NULL */
 414         if (WARN_ON(mvm->scan_cmd == NULL))
 415                 return -ENOMEM;
 416
 417         IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n");
 418         mvm->scan_status = IWL_MVM_SCAN_OS;
 419         memset(cmd, 0, ksize(cmd));
 420
 421         cmd->channel_count = (u8)req->n_channels;
 422         cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
 423         cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
 424         cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
 425
 426         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, req->flags, &params);
 427         cmd->max_out_time = cpu_to_le32(params.max_out_time);
 428         cmd->suspend_time = cpu_to_le32(params.suspend_time);
 429         if (params.passive_fragmented)
 430                 cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
 431
 432         cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
 433         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 434                                         MAC_FILTER_IN_BEACON);
 435
 436         if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
 437                 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
 438         else
 439                 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
 440
 441         cmd->repeats = cpu_to_le32(1);
 442
 443         /*
 444          * If the user asked for passive scan, don't change to active scan if
 445          * you see any activity on the channel - remain passive.
 446          */
 447         if (req->n_ssids > 0) {
 448                 cmd->passive2active = cpu_to_le16(1);
 449                 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
 450                 if (basic_ssid) {
 451                         ssid = req->ssids[0].ssid;
 452                         ssid_len = req->ssids[0].ssid_len;
 453                 }
 454         } else {
 455                 cmd->passive2active = 0;
 456                 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
 457         }
 458
 459         iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->ssids, req->n_ssids,
 460                                 basic_ssid ? 1 : 0);
 461
 462         cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
 463                                            3 << TX_CMD_FLG_BT_PRIO_POS);
 464
 465         cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
 466         cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 467         cmd->tx_cmd.rate_n_flags =
 468                         iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
 469                                                   req->no_cck);
 470
 471         cmd->tx_cmd.len =
 472                 cpu_to_le16(iwl_mvm_fill_probe_req(
 473                             (struct ieee80211_mgmt *)cmd->data,
 474                             vif->addr,
 475                             req->n_ssids, ssid, ssid_len,
 476                             req->ie, req->ie_len, NULL, 0,
 477                             mvm->fw->ucode_capa.max_probe_length));
 478
 479         iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, &params);
 480
 481         cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
 482                 le16_to_cpu(cmd->tx_cmd.len) +
 483                 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
 484         hcmd.len[0] = le16_to_cpu(cmd->len);
 485
 486         status = SCAN_RESPONSE_OK;
 487         ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
 488         if (!ret && status == SCAN_RESPONSE_OK) {
 489                 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
 490         } else {
 491                 /*
 492                  * If the scan failed, it usually means that the FW was unable
 493                  * to allocate the time events. Warn on it, but maybe we
 494                  * should try to send the command again with different params.
 495                  */
 496                 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
 497                         status, ret);
 498                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 499                 ret = -EIO;
 500         }
 501         return ret;
 502 }
 503
 504 int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 505                           struct iwl_device_cmd *cmd)
 506 {
 507         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 508         struct iwl_cmd_response *resp = (void *)pkt->data;
 509
 510         IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
 511                        le32_to_cpu(resp->status));
 512         return 0;
 513 }
 514
 515 int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
 516                           struct iwl_device_cmd *cmd)
 517 {
 518         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 519         struct iwl_scan_complete_notif *notif = (void *)pkt->data;
 520
 521         lockdep_assert_held(&mvm->mutex);
 522
 523         IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
 524                        notif->status, notif->scanned_channels);
 525
 526         if (mvm->scan_status == IWL_MVM_SCAN_OS)
 527                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 528         ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
 529
 530         iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 531
 532         return 0;
 533 }
 534
 535 int iwl_mvm_rx_scan_offload_results(struct iwl_mvm *mvm,
 536                                     struct iwl_rx_cmd_buffer *rxb,
 537                                     struct iwl_device_cmd *cmd)
 538 {
 539         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 540         u8 client_bitmap = 0;
 541
 542         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
 543                 struct iwl_sched_scan_results *notif = (void *)pkt->data;
 544
 545                 client_bitmap = notif->client_bitmap;
 546         }
 547
 548         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
 549             client_bitmap & SCAN_CLIENT_SCHED_SCAN) {
 550                 if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
 551                         IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
 552                         ieee80211_sched_scan_results(mvm->hw);
 553                 } else {
 554                         IWL_DEBUG_SCAN(mvm, "Scan results\n");
 555                 }
 556         }
 557
 558         return 0;
 559 }
 560
 561 static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
 562                                      struct iwl_rx_packet *pkt, void *data)
 563 {
 564         struct iwl_mvm *mvm =
 565                 container_of(notif_wait, struct iwl_mvm, notif_wait);
 566         struct iwl_scan_complete_notif *notif;
 567         u32 *resp;
 568
 569         switch (pkt->hdr.cmd) {
 570         case SCAN_ABORT_CMD:
 571                 resp = (void *)pkt->data;
 572                 if (*resp == CAN_ABORT_STATUS) {
 573                         IWL_DEBUG_SCAN(mvm,
 574                                        "Scan can be aborted, wait until completion\n");
 575                         return false;
 576                 }
 577
 578                 /*
 579                  * If scan cannot be aborted, it means that we had a
 580                  * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
 581                  * ieee80211_scan_completed already.
 582                  */
 583                 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
 584                                *resp);
 585                 return true;
 586
 587         case SCAN_COMPLETE_NOTIFICATION:
 588                 notif = (void *)pkt->data;
 589                 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
 590                                notif->status);
 591                 return true;
 592
 593         default:
 594                 WARN_ON(1);
 595                 return false;
 596         };
 597 }
 598
 599 static int iwl_mvm_cancel_regular_scan(struct iwl_mvm *mvm)
 600 {
 601         struct iwl_notification_wait wait_scan_abort;
 602         static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
 603                                                SCAN_COMPLETE_NOTIFICATION };
 604         int ret;
 605
 606         if (mvm->scan_status == IWL_MVM_SCAN_NONE)
 607                 return 0;
 608
 609         if (iwl_mvm_is_radio_killed(mvm)) {
 610                 ieee80211_scan_completed(mvm->hw, true);
 611                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 612                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 613                 return 0;
 614         }
 615
 616         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
 617                                    scan_abort_notif,
 618                                    ARRAY_SIZE(scan_abort_notif),
 619                                    iwl_mvm_scan_abort_notif, NULL);
 620
 621         ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
 622         if (ret) {
 623                 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
 624                 /* mac80211's state will be cleaned in the nic_restart flow */
 625                 goto out_remove_notif;
 626         }
 627
 628         return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
 629
 630 out_remove_notif:
 631         iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
 632         return ret;
 633 }
 634
 635 int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
 636                                            struct iwl_rx_cmd_buffer *rxb,
 637                                            struct iwl_device_cmd *cmd)
 638 {
 639         struct iwl_rx_packet *pkt = rxb_addr(rxb);
 640         u8 status, ebs_status;
 641
 642         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
 643                 struct iwl_periodic_scan_complete *scan_notif;
 644
 645                 scan_notif = (void *)pkt->data;
 646                 status = scan_notif->status;
 647                 ebs_status = scan_notif->ebs_status;
 648         } else  {
 649                 struct iwl_scan_offload_complete *scan_notif;
 650
 651                 scan_notif = (void *)pkt->data;
 652                 status = scan_notif->status;
 653                 ebs_status = scan_notif->ebs_status;
 654         }
 655         /* scan status must be locked for proper checking */
 656         lockdep_assert_held(&mvm->mutex);
 657
 658         IWL_DEBUG_SCAN(mvm,
 659                        "%s completed, status %s, EBS status %s\n",
 660                        mvm->scan_status == IWL_MVM_SCAN_SCHED ?
 661                                 "Scheduled scan" : "Scan",
 662                        status == IWL_SCAN_OFFLOAD_COMPLETED ?
 663                                 "completed" : "aborted",
 664                        ebs_status == IWL_SCAN_EBS_SUCCESS ?
 665                                 "success" : "failed");
 666
 667
 668         /* only call mac80211 completion if the stop was initiated by FW */
 669         if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
 670                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 671                 ieee80211_sched_scan_stopped(mvm->hw);
 672         } else if (mvm->scan_status == IWL_MVM_SCAN_OS) {
 673                 mvm->scan_status = IWL_MVM_SCAN_NONE;
 674                 ieee80211_scan_completed(mvm->hw,
 675                                          status == IWL_SCAN_OFFLOAD_ABORTED);
 676                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
 677         }
 678
 679         mvm->last_ebs_successful = !ebs_status;
 680
 681         return 0;
 682 }
 683
 684 static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
 685                                           struct ieee80211_vif *vif,
 686                                           struct ieee80211_scan_ies *ies,
 687                                           enum ieee80211_band band,
 688                                           struct iwl_tx_cmd *cmd,
 689                                           u8 *data)
 690 {
 691         u16 cmd_len;
 692
 693         cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
 694         cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
 695         cmd->sta_id = mvm->aux_sta.sta_id;
 696
 697         cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
 698
 699         cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
 700                                          vif->addr,
 701                                          1, NULL, 0,
 702                                          ies->ies[band], ies->len[band],
 703                                          ies->common_ies, ies->common_ie_len,
 704                                          SCAN_OFFLOAD_PROBE_REQ_SIZE);
 705         cmd->len = cpu_to_le16(cmd_len);
 706 }
 707
 708 static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
 709                                struct ieee80211_vif *vif,
 710                                struct cfg80211_sched_scan_request *req,
 711                                struct iwl_scan_offload_cmd *scan,
 712                                struct iwl_mvm_scan_params *params)
 713 {
 714         scan->channel_count = req->n_channels;
 715         scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
 716         scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
 717         scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
 718         scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
 719
 720         scan->max_out_time = cpu_to_le32(params->max_out_time);
 721         scan->suspend_time = cpu_to_le32(params->suspend_time);
 722
 723         scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
 724                                           MAC_FILTER_IN_BEACON);
 725         scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
 726         scan->rep_count = cpu_to_le32(1);
 727
 728         if (params->passive_fragmented)
 729                 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
 730 }
 731
 732 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
 733 {
 734         int i;
 735
 736         for (i = 0; i < PROBE_OPTION_MAX; i++) {
 737                 if (!ssid_list[i].len)
 738                         break;
 739                 if (ssid_list[i].len == ssid_len &&
 740                     !memcmp(ssid_list->ssid, ssid, ssid_len))
 741                         return i;
 742         }
 743         return -1;
 744 }
 745
 746 static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
 747                                         struct iwl_ssid_ie *direct_scan,
 748                                         u32 *ssid_bitmap, bool basic_ssid)
 749 {
 750         int i, j;
 751         int index;
 752
 753         /*
 754          * copy SSIDs from match list.
 755          * iwl_config_sched_scan_profiles() uses the order of these ssids to
 756          * config match list.
 757          */
 758         for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
 759                 /* skip empty SSID matchsets */
 760                 if (!req->match_sets[i].ssid.ssid_len)
 761                         continue;
 762                 direct_scan[i].id = WLAN_EID_SSID;
 763                 direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
 764                 memcpy(direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
 765                        direct_scan[i].len);
 766         }
 767
 768         /* add SSIDs from scan SSID list */
 769         *ssid_bitmap = 0;
 770         for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
 771                 index = iwl_ssid_exist(req->ssids[j].ssid,
 772                                        req->ssids[j].ssid_len,
 773                                        direct_scan);
 774                 if (index < 0) {
 775                         if (!req->ssids[j].ssid_len && basic_ssid)
 776                                 continue;
 777                         direct_scan[i].id = WLAN_EID_SSID;
 778                         direct_scan[i].len = req->ssids[j].ssid_len;
 779                         memcpy(direct_scan[i].ssid, req->ssids[j].ssid,
 780                                direct_scan[i].len);
 781                         *ssid_bitmap |= BIT(i + 1);
 782                         i++;
 783                 } else {
 784                         *ssid_bitmap |= BIT(index + 1);
 785                 }
 786         }
 787 }
 788
 789 static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
 790                                   struct cfg80211_sched_scan_request *req,
 791                                   u8 *channels_buffer,
 792                                   enum ieee80211_band band,
 793                                   int *head,
 794                                   u32 ssid_bitmap,
 795                                   struct iwl_mvm_scan_params *params)
 796 {
 797         u32 n_channels = mvm->fw->ucode_capa.n_scan_channels;
 798         __le32 *type = (__le32 *)channels_buffer;
 799         __le16 *channel_number = (__le16 *)(type + n_channels);
 800         __le16 *iter_count = channel_number + n_channels;
 801         __le32 *iter_interval = (__le32 *)(iter_count + n_channels);
 802         u8 *active_dwell = (u8 *)(iter_interval + n_channels);
 803         u8 *passive_dwell = active_dwell + n_channels;
 804         int i, index = 0;
 805
 806         for (i = 0; i < req->n_channels; i++) {
 807                 struct ieee80211_channel *chan = req->channels[i];
 808
 809                 if (chan->band != band)
 810                         continue;
 811
 812                 index = *head;
 813                 (*head)++;
 814
 815                 channel_number[index] = cpu_to_le16(chan->hw_value);
 816                 active_dwell[index] = params->dwell[band].active;
 817                 passive_dwell[index] = params->dwell[band].passive;
 818
 819                 iter_count[index] = cpu_to_le16(1);
 820                 iter_interval[index] = 0;
 821
 822                 if (!(chan->flags & IEEE80211_CHAN_NO_IR))
 823                         type[index] |=
 824                                 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
 825
 826                 type[index] |= cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL |
 827                                            IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
 828
 829                 if (chan->flags & IEEE80211_CHAN_NO_HT40)
 830                         type[index] |=
 831                                 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
 832
 833                 /* scan for all SSIDs from req->ssids */
 834                 type[index] |= cpu_to_le32(ssid_bitmap);
 835         }
 836 }
 837
 838 int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
 839                               struct ieee80211_vif *vif,
 840                               struct cfg80211_sched_scan_request *req,
 841                               struct ieee80211_scan_ies *ies)
 842 {
 843         int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
 844         int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
 845         int head = 0;
 846         u32 ssid_bitmap;
 847         int cmd_len;
 848         int ret;
 849         u8 *probes;
 850         bool basic_ssid = !(mvm->fw->ucode_capa.flags &
 851                             IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID);
 852
 853         struct iwl_scan_offload_cfg *scan_cfg;
 854         struct iwl_host_cmd cmd = {
 855                 .id = SCAN_OFFLOAD_CONFIG_CMD,
 856         };
 857         struct iwl_mvm_scan_params params = {};
 858
 859         lockdep_assert_held(&mvm->mutex);
 860
 861         cmd_len = sizeof(struct iwl_scan_offload_cfg) +
 862                   mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE +
 863                   2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
 864
 865         scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
 866         if (!scan_cfg)
 867                 return -ENOMEM;
 868
 869         probes = scan_cfg->data +
 870                 mvm->fw->ucode_capa.n_scan_channels * IWL_SCAN_CHAN_SIZE;
 871
 872         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
 873         iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, &params);
 874         scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
 875
 876         iwl_scan_offload_build_ssid(req, scan_cfg->scan_cmd.direct_scan,
 877                                     &ssid_bitmap, basic_ssid);
 878         /* build tx frames for supported bands */
 879         if (band_2ghz) {
 880                 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
 881                                               IEEE80211_BAND_2GHZ,
 882                                               &scan_cfg->scan_cmd.tx_cmd[0],
 883                                               probes);
 884                 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
 885                                       IEEE80211_BAND_2GHZ, &head,
 886                                       ssid_bitmap, &params);
 887         }
 888         if (band_5ghz) {
 889                 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
 890                                               IEEE80211_BAND_5GHZ,
 891                                               &scan_cfg->scan_cmd.tx_cmd[1],
 892                                               probes +
 893                                                 SCAN_OFFLOAD_PROBE_REQ_SIZE);
 894                 iwl_build_channel_cfg(mvm, req, scan_cfg->data,
 895                                       IEEE80211_BAND_5GHZ, &head,
 896                                       ssid_bitmap, &params);
 897         }
 898
 899         cmd.data[0] = scan_cfg;
 900         cmd.len[0] = cmd_len;
 901         cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
 902
 903         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
 904
 905         ret = iwl_mvm_send_cmd(mvm, &cmd);
 906         kfree(scan_cfg);
 907         return ret;
 908 }
 909
 910 int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
 911                                        struct cfg80211_sched_scan_request *req)
 912 {
 913         struct iwl_scan_offload_profile *profile;
 914         struct iwl_scan_offload_profile_cfg *profile_cfg;
 915         struct iwl_scan_offload_blacklist *blacklist;
 916         struct iwl_host_cmd cmd = {
 917                 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
 918                 .len[1] = sizeof(*profile_cfg),
 919                 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
 920                 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
 921         };
 922         int blacklist_len;
 923         int i;
 924         int ret;
 925
 926         if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
 927                         return -EIO;
 928
 929         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
 930                 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
 931         else
 932                 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
 933
 934         blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
 935         if (!blacklist)
 936                 return -ENOMEM;
 937
 938         profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
 939         if (!profile_cfg) {
 940                 ret = -ENOMEM;
 941                 goto free_blacklist;
 942         }
 943
 944         cmd.data[0] = blacklist;
 945         cmd.len[0] = sizeof(*blacklist) * blacklist_len;
 946         cmd.data[1] = profile_cfg;
 947
 948         /* No blacklist configuration */
 949
 950         profile_cfg->num_profiles = req->n_match_sets;
 951         profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
 952         profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
 953         profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
 954         if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
 955                 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
 956
 957         for (i = 0; i < req->n_match_sets; i++) {
 958                 profile = &profile_cfg->profiles[i];
 959                 profile->ssid_index = i;
 960                 /* Support any cipher and auth algorithm */
 961                 profile->unicast_cipher = 0xff;
 962                 profile->auth_alg = 0xff;
 963                 profile->network_type = IWL_NETWORK_TYPE_ANY;
 964                 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
 965                 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
 966         }
 967
 968         IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
 969
 970         ret = iwl_mvm_send_cmd(mvm, &cmd);
 971         kfree(profile_cfg);
 972 free_blacklist:
 973         kfree(blacklist);
 974
 975         return ret;
 976 }
 977
 978 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
 979                              struct cfg80211_sched_scan_request *req)
 980 {
 981         struct iwl_scan_offload_req scan_req = {
 982                 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
 983
 984                 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
 985                 .schedule_line[0].delay = cpu_to_le16(req->interval / 1000),
 986                 .schedule_line[0].full_scan_mul = 1,
 987
 988                 .schedule_line[1].iterations = 0xff,
 989                 .schedule_line[1].delay = cpu_to_le16(req->interval / 1000),
 990                 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
 991         };
 992
 993         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
 994                 IWL_DEBUG_SCAN(mvm,
 995                                "Sending scheduled scan with filtering, filter len %d\n",
 996                                req->n_match_sets);
 997         } else {
 998                 IWL_DEBUG_SCAN(mvm,
 999                                "Sending Scheduled scan without filtering\n");
1000                 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
1001         }
1002
1003         if (mvm->last_ebs_successful &&
1004             mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
1005                 scan_req.flags |=
1006                         cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
1007
1008         return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
1009                                     sizeof(scan_req), &scan_req);
1010 }
1011
1012 int iwl_mvm_scan_offload_start(struct iwl_mvm *mvm,
1013                                struct ieee80211_vif *vif,
1014                                struct cfg80211_sched_scan_request *req,
1015                                struct ieee80211_scan_ies *ies)
1016 {
1017         int ret;
1018
1019         if ((mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
1020                 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1021                 if (ret)
1022                         return ret;
1023                 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
1024         } else {
1025                 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
1026                 if (ret)
1027                         return ret;
1028                 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
1029                 if (ret)
1030                         return ret;
1031                 ret = iwl_mvm_sched_scan_start(mvm, req);
1032         }
1033
1034         return ret;
1035 }
1036
1037 static int iwl_mvm_send_scan_offload_abort(struct iwl_mvm *mvm)
1038 {
1039         int ret;
1040         struct iwl_host_cmd cmd = {
1041                 .id = SCAN_OFFLOAD_ABORT_CMD,
1042         };
1043         u32 status;
1044
1045         /* Exit instantly with error when device is not ready
1046          * to receive scan abort command or it does not perform
1047          * scheduled scan currently */
1048         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1049             (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1050              mvm->scan_status != IWL_MVM_SCAN_OS))
1051                 return -EIO;
1052
1053         ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
1054         if (ret)
1055                 return ret;
1056
1057         if (status != CAN_ABORT_STATUS) {
1058                 /*
1059                  * The scan abort will return 1 for success or
1060                  * 2 for "failure".  A failure condition can be
1061                  * due to simply not being in an active scan which
1062                  * can occur if we send the scan abort before the
1063                  * microcode has notified us that a scan is completed.
1064                  */
1065                 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
1066                 ret = -ENOENT;
1067         }
1068
1069         return ret;
1070 }
1071
1072 int iwl_mvm_scan_offload_stop(struct iwl_mvm *mvm, bool notify)
1073 {
1074         int ret;
1075         struct iwl_notification_wait wait_scan_done;
1076         static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
1077         bool sched = mvm->scan_status == IWL_MVM_SCAN_SCHED;
1078
1079         lockdep_assert_held(&mvm->mutex);
1080
1081         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
1082             (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) ||
1083              mvm->scan_status != IWL_MVM_SCAN_OS)) {
1084                 IWL_DEBUG_SCAN(mvm, "No scan to stop\n");
1085                 return 0;
1086         }
1087
1088         iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
1089                                    scan_done_notif,
1090                                    ARRAY_SIZE(scan_done_notif),
1091                                    NULL, NULL);
1092
1093         ret = iwl_mvm_send_scan_offload_abort(mvm);
1094         if (ret) {
1095                 IWL_DEBUG_SCAN(mvm, "Send stop %sscan failed %d\n",
1096                                sched ? "offloaded " : "", ret);
1097                 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
1098                 return ret;
1099         }
1100
1101         IWL_DEBUG_SCAN(mvm, "Successfully sent stop %sscan\n",
1102                        sched ? "offloaded " : "");
1103
1104         ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
1105         if (ret)
1106                 return ret;
1107
1108         /*
1109          * Clear the scan status so the next scan requests will succeed. This
1110          * also ensures the Rx handler doesn't do anything, as the scan was
1111          * stopped from above. Since the rx handler won't do anything now,
1112          * we have to release the scan reference here.
1113          */
1114         if (mvm->scan_status == IWL_MVM_SCAN_OS)
1115                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1116
1117         mvm->scan_status = IWL_MVM_SCAN_NONE;
1118
1119         if (notify) {
1120                 if (sched)
1121                         ieee80211_sched_scan_stopped(mvm->hw);
1122                 else
1123                         ieee80211_scan_completed(mvm->hw, true);
1124         }
1125
1126         return 0;
1127 }
1128
1129 static void iwl_mvm_unified_scan_fill_tx_cmd(struct iwl_mvm *mvm,
1130                                              struct iwl_scan_req_tx_cmd *tx_cmd,
1131                                              bool no_cck)
1132 {
1133         tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1134                                          TX_CMD_FLG_BT_DIS);
1135         tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1136                                                            IEEE80211_BAND_2GHZ,
1137                                                            no_cck);
1138         tx_cmd[0].sta_id = mvm->aux_sta.sta_id;
1139
1140         tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
1141                                          TX_CMD_FLG_BT_DIS);
1142         tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm,
1143                                                            IEEE80211_BAND_5GHZ,
1144                                                            no_cck);
1145         tx_cmd[1].sta_id = mvm->aux_sta.sta_id;
1146 }
1147
1148 static void
1149 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm,
1150                                struct ieee80211_channel **channels,
1151                                int n_channels, u32 ssid_bitmap,
1152                                struct iwl_scan_req_unified_lmac *cmd)
1153 {
1154         struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data;
1155         int i;
1156
1157         for (i = 0; i < n_channels; i++) {
1158                 channel_cfg[i].channel_num =
1159                         cpu_to_le16(channels[i]->hw_value);
1160                 channel_cfg[i].iter_count = cpu_to_le16(1);
1161                 channel_cfg[i].iter_interval = 0;
1162                 channel_cfg[i].flags =
1163                         cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL |
1164                                     ssid_bitmap);
1165         }
1166 }
1167
1168 static void
1169 iwl_mvm_build_unified_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1170                                  struct ieee80211_scan_ies *ies,
1171                                  struct iwl_scan_req_unified_lmac *cmd)
1172 {
1173         struct iwl_scan_probe_req *preq = (void *)(cmd->data +
1174                 sizeof(struct iwl_scan_channel_cfg_lmac) *
1175                         mvm->fw->ucode_capa.n_scan_channels);
1176         struct ieee80211_mgmt *frame = (struct ieee80211_mgmt *)preq->buf;
1177         u8 *pos;
1178
1179         frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ);
1180         eth_broadcast_addr(frame->da);
1181         memcpy(frame->sa, vif->addr, ETH_ALEN);
1182         eth_broadcast_addr(frame->bssid);
1183         frame->seq_ctrl = 0;
1184
1185         pos = frame->u.probe_req.variable;
1186         *pos++ = WLAN_EID_SSID;
1187         *pos++ = 0;
1188
1189         preq->mac_header.offset = 0;
1190         preq->mac_header.len = cpu_to_le16(24 + 2);
1191
1192         memcpy(pos, ies->ies[IEEE80211_BAND_2GHZ],
1193                ies->len[IEEE80211_BAND_2GHZ]);
1194         preq->band_data[0].offset = cpu_to_le16(pos - preq->buf);
1195         preq->band_data[0].len = cpu_to_le16(ies->len[IEEE80211_BAND_2GHZ]);
1196         pos += ies->len[IEEE80211_BAND_2GHZ];
1197
1198         memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ],
1199                ies->len[IEEE80211_BAND_5GHZ]);
1200         preq->band_data[1].offset = cpu_to_le16(pos - preq->buf);
1201         preq->band_data[1].len = cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]);
1202         pos += ies->len[IEEE80211_BAND_5GHZ];
1203
1204         memcpy(pos, ies->common_ies, ies->common_ie_len);
1205         preq->common_data.offset = cpu_to_le16(pos - preq->buf);
1206         preq->common_data.len = cpu_to_le16(ies->common_ie_len);
1207 }
1208
1209 static void
1210 iwl_mvm_build_generic_unified_scan_cmd(struct iwl_mvm *mvm,
1211                                        struct iwl_scan_req_unified_lmac *cmd,
1212                                        struct iwl_mvm_scan_params *params)
1213 {
1214         memset(cmd, 0, ksize(cmd));
1215         cmd->active_dwell = params->dwell[IEEE80211_BAND_2GHZ].active;
1216         cmd->passive_dwell = params->dwell[IEEE80211_BAND_2GHZ].passive;
1217         if (params->passive_fragmented)
1218                 cmd->fragmented_dwell =
1219                                 params->dwell[IEEE80211_BAND_2GHZ].passive;
1220         cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm);
1221         cmd->max_out_time = cpu_to_le32(params->max_out_time);
1222         cmd->suspend_time = cpu_to_le32(params->suspend_time);
1223         cmd->scan_prio = cpu_to_le32(IWL_SCAN_PRIORITY_HIGH);
1224         cmd->iter_num = cpu_to_le32(1);
1225
1226         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT &&
1227             mvm->last_ebs_successful) {
1228                 cmd->channel_opt[0].flags =
1229                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1230                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1231                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1232                 cmd->channel_opt[1].flags =
1233                         cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS |
1234                                     IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE |
1235                                     IWL_SCAN_CHANNEL_FLAG_CACHE_ADD);
1236         }
1237
1238         if (iwl_mvm_rrm_scan_needed(mvm))
1239                 cmd->scan_flags |=
1240                         cpu_to_le32(IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED);
1241 }
1242
1243 int iwl_mvm_unified_scan_lmac(struct iwl_mvm *mvm,
1244                               struct ieee80211_vif *vif,
1245                               struct ieee80211_scan_request *req)
1246 {
1247         struct iwl_host_cmd hcmd = {
1248                 .id = SCAN_OFFLOAD_REQUEST_CMD,
1249                 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1250                          sizeof(struct iwl_scan_channel_cfg_lmac) *
1251                                 mvm->fw->ucode_capa.n_scan_channels +
1252                          sizeof(struct iwl_scan_probe_req), },
1253                 .data = { mvm->scan_cmd, },
1254                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1255         };
1256         struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1257         struct iwl_mvm_scan_params params = {};
1258         u32 flags;
1259         int ssid_bitmap = 0;
1260         int ret, i;
1261
1262         lockdep_assert_held(&mvm->mutex);
1263
1264         /* we should have failed registration if scan_cmd was NULL */
1265         if (WARN_ON(mvm->scan_cmd == NULL))
1266                 return -ENOMEM;
1267
1268         if (req->req.n_ssids > PROBE_OPTION_MAX ||
1269             req->ies.common_ie_len + req->ies.len[NL80211_BAND_2GHZ] +
1270             req->ies.len[NL80211_BAND_5GHZ] >
1271                 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, false) ||
1272             req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
1273                 return -ENOBUFS;
1274
1275         mvm->scan_status = IWL_MVM_SCAN_OS;
1276
1277         iwl_mvm_scan_calc_params(mvm, vif, req->req.n_ssids, req->req.flags,
1278                                  &params);
1279
1280         iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1281
1282         cmd->n_channels = (u8)req->req.n_channels;
1283
1284         flags = IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1285
1286         if (req->req.n_ssids == 1 && req->req.ssids[0].ssid_len != 0)
1287                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1288
1289         if (params.passive_fragmented)
1290                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1291
1292         if (req->req.n_ssids == 0)
1293                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1294
1295         cmd->scan_flags |= cpu_to_le32(flags);
1296
1297         cmd->flags = iwl_mvm_scan_rxon_flags(req->req.channels[0]->band);
1298         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1299                                         MAC_FILTER_IN_BEACON);
1300         iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, req->req.no_cck);
1301         iwl_mvm_scan_fill_ssids(cmd->direct_scan, req->req.ssids,
1302                                 req->req.n_ssids, 0);
1303
1304         cmd->schedule[0].delay = 0;
1305         cmd->schedule[0].iterations = 1;
1306         cmd->schedule[0].full_scan_mul = 0;
1307         cmd->schedule[1].delay = 0;
1308         cmd->schedule[1].iterations = 0;
1309         cmd->schedule[1].full_scan_mul = 0;
1310
1311         for (i = 1; i <= req->req.n_ssids; i++)
1312                 ssid_bitmap |= BIT(i);
1313
1314         iwl_mvm_lmac_scan_cfg_channels(mvm, req->req.channels,
1315                                        req->req.n_channels, ssid_bitmap,
1316                                        cmd);
1317
1318         iwl_mvm_build_unified_scan_probe(mvm, vif, &req->ies, cmd);
1319
1320         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1321         if (!ret) {
1322                 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
1323         } else {
1324                 /*
1325                  * If the scan failed, it usually means that the FW was unable
1326                  * to allocate the time events. Warn on it, but maybe we
1327                  * should try to send the command again with different params.
1328                  */
1329                 IWL_ERR(mvm, "Scan failed! ret %d\n", ret);
1330                 mvm->scan_status = IWL_MVM_SCAN_NONE;
1331                 ret = -EIO;
1332         }
1333         return ret;
1334 }
1335
1336 int iwl_mvm_unified_sched_scan_lmac(struct iwl_mvm *mvm,
1337                                     struct ieee80211_vif *vif,
1338                                     struct cfg80211_sched_scan_request *req,
1339                                     struct ieee80211_scan_ies *ies)
1340 {
1341         struct iwl_host_cmd hcmd = {
1342                 .id = SCAN_OFFLOAD_REQUEST_CMD,
1343                 .len = { sizeof(struct iwl_scan_req_unified_lmac) +
1344                          sizeof(struct iwl_scan_channel_cfg_lmac) *
1345                                 mvm->fw->ucode_capa.n_scan_channels +
1346                          sizeof(struct iwl_scan_probe_req), },
1347                 .data = { mvm->scan_cmd, },
1348                 .dataflags = { IWL_HCMD_DFL_NOCOPY, },
1349         };
1350         struct iwl_scan_req_unified_lmac *cmd = mvm->scan_cmd;
1351         struct iwl_mvm_scan_params params = {};
1352         int ret;
1353         u32 flags = 0, ssid_bitmap = 0;
1354
1355         lockdep_assert_held(&mvm->mutex);
1356
1357         /* we should have failed registration if scan_cmd was NULL */
1358         if (WARN_ON(mvm->scan_cmd == NULL))
1359                 return -ENOMEM;
1360
1361         if (req->n_ssids > PROBE_OPTION_MAX ||
1362             ies->common_ie_len + ies->len[NL80211_BAND_2GHZ] +
1363             ies->len[NL80211_BAND_5GHZ] >
1364                 iwl_mvm_max_scan_ie_fw_cmd_room(mvm, true) ||
1365             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1366                 return -ENOBUFS;
1367
1368         iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, 0, &params);
1369
1370         iwl_mvm_build_generic_unified_scan_cmd(mvm, cmd, &params);
1371
1372         cmd->n_channels = (u8)req->n_channels;
1373
1374         if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
1375                 IWL_DEBUG_SCAN(mvm,
1376                                "Sending scheduled scan with filtering, n_match_sets %d\n",
1377                                req->n_match_sets);
1378         } else {
1379                 IWL_DEBUG_SCAN(mvm,
1380                                "Sending Scheduled scan without filtering\n");
1381                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL;
1382         }
1383
1384         if (req->n_ssids == 1 && req->ssids[0].ssid_len != 0)
1385                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION;
1386
1387         if (params.passive_fragmented)
1388                 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED;
1389
1390         if (req->n_ssids == 0)
1391                 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE;
1392
1393         cmd->scan_flags |= cpu_to_le32(flags);
1394
1395         cmd->flags = iwl_mvm_scan_rxon_flags(req->channels[0]->band);
1396         cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
1397                                         MAC_FILTER_IN_BEACON);
1398         iwl_mvm_unified_scan_fill_tx_cmd(mvm, cmd->tx_cmd, false);
1399         iwl_scan_offload_build_ssid(req, cmd->direct_scan, &ssid_bitmap, false);
1400
1401         cmd->schedule[0].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1402         cmd->schedule[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS;
1403         cmd->schedule[0].full_scan_mul = 1;
1404
1405         cmd->schedule[1].delay = cpu_to_le16(req->interval / MSEC_PER_SEC);
1406         cmd->schedule[1].iterations = 0xff;
1407         cmd->schedule[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER;
1408
1409         iwl_mvm_lmac_scan_cfg_channels(mvm, req->channels, req->n_channels,
1410                                        ssid_bitmap, cmd);
1411
1412         iwl_mvm_build_unified_scan_probe(mvm, vif, ies, cmd);
1413
1414         ret = iwl_mvm_send_cmd(mvm, &hcmd);
1415         if (!ret) {
1416                 IWL_DEBUG_SCAN(mvm,
1417                                "Sched scan request was sent successfully\n");
1418         } else {
1419                 /*
1420                  * If the scan failed, it usually means that the FW was unable
1421                  * to allocate the time events. Warn on it, but maybe we
1422                  * should try to send the command again with different params.
1423                  */
1424                 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret);
1425                 mvm->scan_status = IWL_MVM_SCAN_NONE;
1426                 ret = -EIO;
1427         }
1428         return ret;
1429 }
1430
1431
1432 int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
1433 {
1434         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1435                 return iwl_mvm_scan_offload_stop(mvm, true);
1436         return iwl_mvm_cancel_regular_scan(mvm);
1437 }