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