1 /****************************************************************************** 2 * 3 * This file is provided under a dual BSD/GPLv2 license. When using or 4 * redistributing this file, you may do so under either license. 5 * 6 * GPL LICENSE SUMMARY 7 * 8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 9 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 10 * Copyright(c) 2016 Intel Deutschland GmbH 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of version 2 of the GNU General Public License as 14 * published by the Free Software Foundation. 15 * 16 * This program is distributed in the hope that it will be useful, but 17 * WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 * General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, 24 * USA 25 * 26 * The full GNU General Public License is included in this distribution 27 * in the file called COPYING. 28 * 29 * Contact Information: 30 * Intel Linux Wireless <linuxwifi@intel.com> 31 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 32 * 33 * BSD LICENSE 34 * 35 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. 36 * Copyright(c) 2013 - 2015 Intel Mobile Communications GmbH 37 * Copyright(c) 2016 Intel Deutschland GmbH 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 44 * * Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * * Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in 48 * the documentation and/or other materials provided with the 49 * distribution. 50 * * Neither the name Intel Corporation nor the names of its 51 * contributors may be used to endorse or promote products derived 52 * from this software without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 55 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 56 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 57 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 58 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 59 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 60 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 61 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 62 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 63 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 64 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 65 * 66 *****************************************************************************/ 67 68 #include <linux/etherdevice.h> 69 #include <net/mac80211.h> 70 71 #include "mvm.h" 72 #include "fw-api-scan.h" 73 74 #define IWL_DENSE_EBS_SCAN_RATIO 5 75 #define IWL_SPARSE_EBS_SCAN_RATIO 1 76 77 enum iwl_mvm_traffic_load { 78 IWL_MVM_TRAFFIC_LOW, 79 IWL_MVM_TRAFFIC_MEDIUM, 80 IWL_MVM_TRAFFIC_HIGH, 81 }; 82 83 struct iwl_mvm_scan_timing_params { 84 u32 dwell_active; 85 u32 dwell_passive; 86 u32 dwell_fragmented; 87 u32 dwell_extended; 88 u32 suspend_time; 89 u32 max_out_time; 90 }; 91 92 static struct iwl_mvm_scan_timing_params scan_timing[] = { 93 [IWL_SCAN_TYPE_UNASSOC] = { 94 .dwell_active = 10, 95 .dwell_passive = 110, 96 .dwell_fragmented = 44, 97 .dwell_extended = 90, 98 .suspend_time = 0, 99 .max_out_time = 0, 100 }, 101 [IWL_SCAN_TYPE_WILD] = { 102 .dwell_active = 10, 103 .dwell_passive = 110, 104 .dwell_fragmented = 44, 105 .dwell_extended = 90, 106 .suspend_time = 30, 107 .max_out_time = 120, 108 }, 109 [IWL_SCAN_TYPE_MILD] = { 110 .dwell_active = 10, 111 .dwell_passive = 110, 112 .dwell_fragmented = 44, 113 .dwell_extended = 90, 114 .suspend_time = 120, 115 .max_out_time = 120, 116 }, 117 [IWL_SCAN_TYPE_FRAGMENTED] = { 118 .dwell_active = 10, 119 .dwell_passive = 110, 120 .dwell_fragmented = 44, 121 .suspend_time = 95, 122 .max_out_time = 44, 123 }, 124 }; 125 126 struct iwl_mvm_scan_params { 127 enum iwl_mvm_scan_type type; 128 u32 n_channels; 129 u16 delay; 130 int n_ssids; 131 struct cfg80211_ssid *ssids; 132 struct ieee80211_channel **channels; 133 u32 flags; 134 u8 *mac_addr; 135 u8 *mac_addr_mask; 136 bool no_cck; 137 bool pass_all; 138 int n_match_sets; 139 struct iwl_scan_probe_req preq; 140 struct cfg80211_match_set *match_sets; 141 int n_scan_plans; 142 struct cfg80211_sched_scan_plan *scan_plans; 143 }; 144 145 static u8 iwl_mvm_scan_rx_ant(struct iwl_mvm *mvm) 146 { 147 if (mvm->scan_rx_ant != ANT_NONE) 148 return mvm->scan_rx_ant; 149 return iwl_mvm_get_valid_rx_ant(mvm); 150 } 151 152 static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) 153 { 154 u16 rx_chain; 155 u8 rx_ant; 156 157 rx_ant = iwl_mvm_scan_rx_ant(mvm); 158 rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; 159 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; 160 rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; 161 rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; 162 return cpu_to_le16(rx_chain); 163 } 164 165 static __le32 iwl_mvm_scan_rxon_flags(enum ieee80211_band band) 166 { 167 if (band == IEEE80211_BAND_2GHZ) 168 return cpu_to_le32(PHY_BAND_24); 169 else 170 return cpu_to_le32(PHY_BAND_5); 171 } 172 173 static inline __le32 174 iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band, 175 bool no_cck) 176 { 177 u32 tx_ant; 178 179 mvm->scan_last_antenna_idx = 180 iwl_mvm_next_antenna(mvm, iwl_mvm_get_valid_tx_ant(mvm), 181 mvm->scan_last_antenna_idx); 182 tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; 183 184 if (band == IEEE80211_BAND_2GHZ && !no_cck) 185 return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | 186 tx_ant); 187 else 188 return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); 189 } 190 191 static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, 192 struct ieee80211_vif *vif) 193 { 194 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); 195 int *global_cnt = data; 196 197 if (vif->type != NL80211_IFTYPE_P2P_DEVICE && mvmvif->phy_ctxt && 198 mvmvif->phy_ctxt->id < MAX_PHYS) 199 *global_cnt += 1; 200 } 201 202 static enum iwl_mvm_traffic_load iwl_mvm_get_traffic_load(struct iwl_mvm *mvm) 203 { 204 return IWL_MVM_TRAFFIC_LOW; 205 } 206 207 static enum 208 iwl_mvm_scan_type iwl_mvm_get_scan_type(struct iwl_mvm *mvm, bool p2p_device) 209 { 210 int global_cnt = 0; 211 enum iwl_mvm_traffic_load load; 212 bool low_latency; 213 214 ieee80211_iterate_active_interfaces_atomic(mvm->hw, 215 IEEE80211_IFACE_ITER_NORMAL, 216 iwl_mvm_scan_condition_iterator, 217 &global_cnt); 218 if (!global_cnt) 219 return IWL_SCAN_TYPE_UNASSOC; 220 221 load = iwl_mvm_get_traffic_load(mvm); 222 low_latency = iwl_mvm_low_latency(mvm); 223 224 if ((load == IWL_MVM_TRAFFIC_HIGH || low_latency) && !p2p_device && 225 fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_FRAGMENTED_SCAN)) 226 return IWL_SCAN_TYPE_FRAGMENTED; 227 228 if (load >= IWL_MVM_TRAFFIC_MEDIUM || low_latency) 229 return IWL_SCAN_TYPE_MILD; 230 231 return IWL_SCAN_TYPE_WILD; 232 } 233 234 static inline bool iwl_mvm_rrm_scan_needed(struct iwl_mvm *mvm) 235 { 236 /* require rrm scan whenever the fw supports it */ 237 return fw_has_capa(&mvm->fw->ucode_capa, 238 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT); 239 } 240 241 static int iwl_mvm_max_scan_ie_fw_cmd_room(struct iwl_mvm *mvm) 242 { 243 int max_probe_len; 244 245 max_probe_len = SCAN_OFFLOAD_PROBE_REQ_SIZE; 246 247 /* we create the 802.11 header and SSID element */ 248 max_probe_len -= 24 + 2; 249 250 /* DS parameter set element is added on 2.4GHZ band if required */ 251 if (iwl_mvm_rrm_scan_needed(mvm)) 252 max_probe_len -= 3; 253 254 return max_probe_len; 255 } 256 257 int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm) 258 { 259 int max_ie_len = iwl_mvm_max_scan_ie_fw_cmd_room(mvm); 260 261 /* TODO: [BUG] This function should return the maximum allowed size of 262 * scan IEs, however the LMAC scan api contains both 2GHZ and 5GHZ IEs 263 * in the same command. So the correct implementation of this function 264 * is just iwl_mvm_max_scan_ie_fw_cmd_room() / 2. Currently the scan 265 * command has only 512 bytes and it would leave us with about 240 266 * bytes for scan IEs, which is clearly not enough. So meanwhile 267 * we will report an incorrect value. This may result in a failure to 268 * issue a scan in unified_scan_lmac and unified_sched_scan_lmac 269 * functions with -ENOBUFS, if a large enough probe will be provided. 270 */ 271 return max_ie_len; 272 } 273 274 static u8 *iwl_mvm_dump_channel_list(struct iwl_scan_results_notif *res, 275 int num_res, u8 *buf, size_t buf_size) 276 { 277 int i; 278 u8 *pos = buf, *end = buf + buf_size; 279 280 for (i = 0; pos < end && i < num_res; i++) 281 pos += snprintf(pos, end - pos, " %u", res[i].channel); 282 283 /* terminate the string in case the buffer was too short */ 284 *(buf + buf_size - 1) = '\0'; 285 286 return buf; 287 } 288 289 void iwl_mvm_rx_lmac_scan_iter_complete_notif(struct iwl_mvm *mvm, 290 struct iwl_rx_cmd_buffer *rxb) 291 { 292 struct iwl_rx_packet *pkt = rxb_addr(rxb); 293 struct iwl_lmac_scan_complete_notif *notif = (void *)pkt->data; 294 u8 buf[256]; 295 296 IWL_DEBUG_SCAN(mvm, 297 "Scan offload iteration complete: status=0x%x scanned channels=%d channels list: %s\n", 298 notif->status, notif->scanned_channels, 299 iwl_mvm_dump_channel_list(notif->results, 300 notif->scanned_channels, buf, 301 sizeof(buf))); 302 303 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 304 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 305 ieee80211_sched_scan_results(mvm->hw); 306 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 307 } 308 } 309 310 void iwl_mvm_rx_scan_match_found(struct iwl_mvm *mvm, 311 struct iwl_rx_cmd_buffer *rxb) 312 { 313 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); 314 ieee80211_sched_scan_results(mvm->hw); 315 } 316 317 static const char *iwl_mvm_ebs_status_str(enum iwl_scan_ebs_status status) 318 { 319 switch (status) { 320 case IWL_SCAN_EBS_SUCCESS: 321 return "successful"; 322 case IWL_SCAN_EBS_INACTIVE: 323 return "inactive"; 324 case IWL_SCAN_EBS_FAILED: 325 case IWL_SCAN_EBS_CHAN_NOT_FOUND: 326 default: 327 return "failed"; 328 } 329 } 330 331 void iwl_mvm_rx_lmac_scan_complete_notif(struct iwl_mvm *mvm, 332 struct iwl_rx_cmd_buffer *rxb) 333 { 334 struct iwl_rx_packet *pkt = rxb_addr(rxb); 335 struct iwl_periodic_scan_complete *scan_notif = (void *)pkt->data; 336 bool aborted = (scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 337 338 /* If this happens, the firmware has mistakenly sent an LMAC 339 * notification during UMAC scans -- warn and ignore it. 340 */ 341 if (WARN_ON_ONCE(fw_has_capa(&mvm->fw->ucode_capa, 342 IWL_UCODE_TLV_CAPA_UMAC_SCAN))) 343 return; 344 345 /* scan status must be locked for proper checking */ 346 lockdep_assert_held(&mvm->mutex); 347 348 /* We first check if we were stopping a scan, in which case we 349 * just clear the stopping flag. Then we check if it was a 350 * firmware initiated stop, in which case we need to inform 351 * mac80211. 352 * Note that we can have a stopping and a running scan 353 * simultaneously, but we can't have two different types of 354 * scans stopping or running at the same time (since LMAC 355 * doesn't support it). 356 */ 357 358 if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_SCHED) { 359 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR); 360 361 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 362 aborted ? "aborted" : "completed", 363 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 364 IWL_DEBUG_SCAN(mvm, 365 "Last line %d, Last iteration %d, Time after last iteration %d\n", 366 scan_notif->last_schedule_line, 367 scan_notif->last_schedule_iteration, 368 __le32_to_cpu(scan_notif->time_after_last_iter)); 369 370 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_SCHED; 371 } else if (mvm->scan_status & IWL_MVM_SCAN_STOPPING_REGULAR) { 372 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s\n", 373 aborted ? "aborted" : "completed", 374 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 375 376 mvm->scan_status &= ~IWL_MVM_SCAN_STOPPING_REGULAR; 377 } else if (mvm->scan_status & IWL_MVM_SCAN_SCHED) { 378 WARN_ON_ONCE(mvm->scan_status & IWL_MVM_SCAN_REGULAR); 379 380 IWL_DEBUG_SCAN(mvm, "Scheduled scan %s, EBS status %s\n", 381 aborted ? "aborted" : "completed", 382 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 383 IWL_DEBUG_SCAN(mvm, 384 "Last line %d, Last iteration %d, Time after last iteration %d (FW)\n", 385 scan_notif->last_schedule_line, 386 scan_notif->last_schedule_iteration, 387 __le32_to_cpu(scan_notif->time_after_last_iter)); 388 389 mvm->scan_status &= ~IWL_MVM_SCAN_SCHED; 390 ieee80211_sched_scan_stopped(mvm->hw); 391 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 392 } else if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) { 393 IWL_DEBUG_SCAN(mvm, "Regular scan %s, EBS status %s (FW)\n", 394 aborted ? "aborted" : "completed", 395 iwl_mvm_ebs_status_str(scan_notif->ebs_status)); 396 397 mvm->scan_status &= ~IWL_MVM_SCAN_REGULAR; 398 ieee80211_scan_completed(mvm->hw, 399 scan_notif->status == IWL_SCAN_OFFLOAD_ABORTED); 400 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 401 } 402 403 mvm->last_ebs_successful = 404 scan_notif->ebs_status == IWL_SCAN_EBS_SUCCESS || 405 scan_notif->ebs_status == IWL_SCAN_EBS_INACTIVE; 406 } 407 408 static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) 409 { 410 int i; 411 412 for (i = 0; i < PROBE_OPTION_MAX; i++) { 413 if (!ssid_list[i].len) 414 break; 415 if (ssid_list[i].len == ssid_len && 416 !memcmp(ssid_list->ssid, ssid, ssid_len)) 417 return i; 418 } 419 return -1; 420 } 421 422 /* We insert the SSIDs in an inverted order, because the FW will 423 * invert it back. 424 */ 425 static void iwl_scan_build_ssids(struct iwl_mvm_scan_params *params, 426 struct iwl_ssid_ie *ssids, 427 u32 *ssid_bitmap) 428 { 429 int i, j; 430 int index; 431 432 /* 433 * copy SSIDs from match list. 434 * iwl_config_sched_scan_profiles() uses the order of these ssids to 435 * config match list. 436 */ 437 for (i = 0, j = params->n_match_sets - 1; 438 j >= 0 && i < PROBE_OPTION_MAX; 439 i++, j--) { 440 /* skip empty SSID matchsets */ 441 if (!params->match_sets[j].ssid.ssid_len) 442 continue; 443 ssids[i].id = WLAN_EID_SSID; 444 ssids[i].len = params->match_sets[j].ssid.ssid_len; 445 memcpy(ssids[i].ssid, params->match_sets[j].ssid.ssid, 446 ssids[i].len); 447 } 448 449 /* add SSIDs from scan SSID list */ 450 *ssid_bitmap = 0; 451 for (j = params->n_ssids - 1; 452 j >= 0 && i < PROBE_OPTION_MAX; 453 i++, j--) { 454 index = iwl_ssid_exist(params->ssids[j].ssid, 455 params->ssids[j].ssid_len, 456 ssids); 457 if (index < 0) { 458 ssids[i].id = WLAN_EID_SSID; 459 ssids[i].len = params->ssids[j].ssid_len; 460 memcpy(ssids[i].ssid, params->ssids[j].ssid, 461 ssids[i].len); 462 *ssid_bitmap |= BIT(i); 463 } else { 464 *ssid_bitmap |= BIT(index); 465 } 466 } 467 } 468 469 static int 470 iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, 471 struct cfg80211_sched_scan_request *req) 472 { 473 struct iwl_scan_offload_profile *profile; 474 struct iwl_scan_offload_profile_cfg *profile_cfg; 475 struct iwl_scan_offload_blacklist *blacklist; 476 struct iwl_host_cmd cmd = { 477 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, 478 .len[1] = sizeof(*profile_cfg), 479 .dataflags[0] = IWL_HCMD_DFL_NOCOPY, 480 .dataflags[1] = IWL_HCMD_DFL_NOCOPY, 481 }; 482 int blacklist_len; 483 int i; 484 int ret; 485 486 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) 487 return -EIO; 488 489 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) 490 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; 491 else 492 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; 493 494 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); 495 if (!blacklist) 496 return -ENOMEM; 497 498 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); 499 if (!profile_cfg) { 500 ret = -ENOMEM; 501 goto free_blacklist; 502 } 503 504 cmd.data[0] = blacklist; 505 cmd.len[0] = sizeof(*blacklist) * blacklist_len; 506 cmd.data[1] = profile_cfg; 507 508 /* No blacklist configuration */ 509 510 profile_cfg->num_profiles = req->n_match_sets; 511 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; 512 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; 513 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; 514 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) 515 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; 516 517 for (i = 0; i < req->n_match_sets; i++) { 518 profile = &profile_cfg->profiles[i]; 519 profile->ssid_index = i; 520 /* Support any cipher and auth algorithm */ 521 profile->unicast_cipher = 0xff; 522 profile->auth_alg = 0xff; 523 profile->network_type = IWL_NETWORK_TYPE_ANY; 524 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; 525 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; 526 } 527 528 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); 529 530 ret = iwl_mvm_send_cmd(mvm, &cmd); 531 kfree(profile_cfg); 532 free_blacklist: 533 kfree(blacklist); 534 535 return ret; 536 } 537 538 static bool iwl_mvm_scan_pass_all(struct iwl_mvm *mvm, 539 struct cfg80211_sched_scan_request *req) 540 { 541 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { 542 IWL_DEBUG_SCAN(mvm, 543 "Sending scheduled scan with filtering, n_match_sets %d\n", 544 req->n_match_sets); 545 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 546 return false; 547 } 548 549 IWL_DEBUG_SCAN(mvm, "Sending Scheduled scan without filtering\n"); 550 551 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 552 return true; 553 } 554 555 static int iwl_mvm_lmac_scan_abort(struct iwl_mvm *mvm) 556 { 557 int ret; 558 struct iwl_host_cmd cmd = { 559 .id = SCAN_OFFLOAD_ABORT_CMD, 560 }; 561 u32 status; 562 563 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); 564 if (ret) 565 return ret; 566 567 if (status != CAN_ABORT_STATUS) { 568 /* 569 * The scan abort will return 1 for success or 570 * 2 for "failure". A failure condition can be 571 * due to simply not being in an active scan which 572 * can occur if we send the scan abort before the 573 * microcode has notified us that a scan is completed. 574 */ 575 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); 576 ret = -ENOENT; 577 } 578 579 return ret; 580 } 581 582 static void iwl_mvm_scan_fill_tx_cmd(struct iwl_mvm *mvm, 583 struct iwl_scan_req_tx_cmd *tx_cmd, 584 bool no_cck) 585 { 586 tx_cmd[0].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 587 TX_CMD_FLG_BT_DIS); 588 tx_cmd[0].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 589 IEEE80211_BAND_2GHZ, 590 no_cck); 591 tx_cmd[0].sta_id = mvm->aux_sta.sta_id; 592 593 tx_cmd[1].tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | 594 TX_CMD_FLG_BT_DIS); 595 tx_cmd[1].rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, 596 IEEE80211_BAND_5GHZ, 597 no_cck); 598 tx_cmd[1].sta_id = mvm->aux_sta.sta_id; 599 } 600 601 static void 602 iwl_mvm_lmac_scan_cfg_channels(struct iwl_mvm *mvm, 603 struct ieee80211_channel **channels, 604 int n_channels, u32 ssid_bitmap, 605 struct iwl_scan_req_lmac *cmd) 606 { 607 struct iwl_scan_channel_cfg_lmac *channel_cfg = (void *)&cmd->data; 608 int i; 609 610 for (i = 0; i < n_channels; i++) { 611 channel_cfg[i].channel_num = 612 cpu_to_le16(channels[i]->hw_value); 613 channel_cfg[i].iter_count = cpu_to_le16(1); 614 channel_cfg[i].iter_interval = 0; 615 channel_cfg[i].flags = 616 cpu_to_le32(IWL_UNIFIED_SCAN_CHANNEL_PARTIAL | 617 ssid_bitmap); 618 } 619 } 620 621 static u8 *iwl_mvm_copy_and_insert_ds_elem(struct iwl_mvm *mvm, const u8 *ies, 622 size_t len, u8 *const pos) 623 { 624 static const u8 before_ds_params[] = { 625 WLAN_EID_SSID, 626 WLAN_EID_SUPP_RATES, 627 WLAN_EID_REQUEST, 628 WLAN_EID_EXT_SUPP_RATES, 629 }; 630 size_t offs; 631 u8 *newpos = pos; 632 633 if (!iwl_mvm_rrm_scan_needed(mvm)) { 634 memcpy(newpos, ies, len); 635 return newpos + len; 636 } 637 638 offs = ieee80211_ie_split(ies, len, 639 before_ds_params, 640 ARRAY_SIZE(before_ds_params), 641 0); 642 643 memcpy(newpos, ies, offs); 644 newpos += offs; 645 646 /* Add a placeholder for DS Parameter Set element */ 647 *newpos++ = WLAN_EID_DS_PARAMS; 648 *newpos++ = 1; 649 *newpos++ = 0; 650 651 memcpy(newpos, ies + offs, len - offs); 652 newpos += len - offs; 653 654 return newpos; 655 } 656 657 static void 658 iwl_mvm_build_scan_probe(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 659 struct ieee80211_scan_ies *ies, 660 struct iwl_mvm_scan_params *params) 661 { 662 struct ieee80211_mgmt *frame = (void *)params->preq.buf; 663 u8 *pos, *newpos; 664 const u8 *mac_addr = params->flags & NL80211_SCAN_FLAG_RANDOM_ADDR ? 665 params->mac_addr : NULL; 666 667 /* 668 * Unfortunately, right now the offload scan doesn't support randomising 669 * within the firmware, so until the firmware API is ready we implement 670 * it in the driver. This means that the scan iterations won't really be 671 * random, only when it's restarted, but at least that helps a bit. 672 */ 673 if (mac_addr) 674 get_random_mask_addr(frame->sa, mac_addr, 675 params->mac_addr_mask); 676 else 677 memcpy(frame->sa, vif->addr, ETH_ALEN); 678 679 frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); 680 eth_broadcast_addr(frame->da); 681 eth_broadcast_addr(frame->bssid); 682 frame->seq_ctrl = 0; 683 684 pos = frame->u.probe_req.variable; 685 *pos++ = WLAN_EID_SSID; 686 *pos++ = 0; 687 688 params->preq.mac_header.offset = 0; 689 params->preq.mac_header.len = cpu_to_le16(24 + 2); 690 691 /* Insert ds parameter set element on 2.4 GHz band */ 692 newpos = iwl_mvm_copy_and_insert_ds_elem(mvm, 693 ies->ies[IEEE80211_BAND_2GHZ], 694 ies->len[IEEE80211_BAND_2GHZ], 695 pos); 696 params->preq.band_data[0].offset = cpu_to_le16(pos - params->preq.buf); 697 params->preq.band_data[0].len = cpu_to_le16(newpos - pos); 698 pos = newpos; 699 700 memcpy(pos, ies->ies[IEEE80211_BAND_5GHZ], 701 ies->len[IEEE80211_BAND_5GHZ]); 702 params->preq.band_data[1].offset = cpu_to_le16(pos - params->preq.buf); 703 params->preq.band_data[1].len = 704 cpu_to_le16(ies->len[IEEE80211_BAND_5GHZ]); 705 pos += ies->len[IEEE80211_BAND_5GHZ]; 706 707 memcpy(pos, ies->common_ies, ies->common_ie_len); 708 params->preq.common_data.offset = cpu_to_le16(pos - params->preq.buf); 709 params->preq.common_data.len = cpu_to_le16(ies->common_ie_len); 710 } 711 712 static __le32 iwl_mvm_scan_priority(struct iwl_mvm *mvm, 713 enum iwl_scan_priority_ext prio) 714 { 715 if (fw_has_api(&mvm->fw->ucode_capa, 716 IWL_UCODE_TLV_API_EXT_SCAN_PRIORITY)) 717 return cpu_to_le32(prio); 718 719 if (prio <= IWL_SCAN_PRIORITY_EXT_2) 720 return cpu_to_le32(IWL_SCAN_PRIORITY_LOW); 721 722 if (prio <= IWL_SCAN_PRIORITY_EXT_4) 723 return cpu_to_le32(IWL_SCAN_PRIORITY_MEDIUM); 724 725 return cpu_to_le32(IWL_SCAN_PRIORITY_HIGH); 726 } 727 728 static void iwl_mvm_scan_lmac_dwell(struct iwl_mvm *mvm, 729 struct iwl_scan_req_lmac *cmd, 730 struct iwl_mvm_scan_params *params) 731 { 732 cmd->active_dwell = scan_timing[params->type].dwell_active; 733 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 734 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 735 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 736 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 737 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 738 cmd->scan_prio = iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 739 } 740 741 static inline bool iwl_mvm_scan_fits(struct iwl_mvm *mvm, int n_ssids, 742 struct ieee80211_scan_ies *ies, 743 int n_channels) 744 { 745 return ((n_ssids <= PROBE_OPTION_MAX) && 746 (n_channels <= mvm->fw->ucode_capa.n_scan_channels) & 747 (ies->common_ie_len + 748 ies->len[NL80211_BAND_2GHZ] + 749 ies->len[NL80211_BAND_5GHZ] <= 750 iwl_mvm_max_scan_ie_fw_cmd_room(mvm))); 751 } 752 753 static inline bool iwl_mvm_scan_use_ebs(struct iwl_mvm *mvm, 754 struct ieee80211_vif *vif) 755 { 756 const struct iwl_ucode_capabilities *capa = &mvm->fw->ucode_capa; 757 758 /* We can only use EBS if: 759 * 1. the feature is supported; 760 * 2. the last EBS was successful; 761 * 3. if only single scan, the single scan EBS API is supported; 762 * 4. it's not a p2p find operation. 763 */ 764 return ((capa->flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) && 765 mvm->last_ebs_successful && 766 vif->type != NL80211_IFTYPE_P2P_DEVICE); 767 } 768 769 static inline bool iwl_mvm_is_regular_scan(struct iwl_mvm_scan_params *params) 770 { 771 return params->n_scan_plans == 1 && 772 params->scan_plans[0].iterations == 1; 773 } 774 775 static int iwl_mvm_scan_lmac_flags(struct iwl_mvm *mvm, 776 struct iwl_mvm_scan_params *params, 777 struct ieee80211_vif *vif) 778 { 779 int flags = 0; 780 781 if (params->n_ssids == 0) 782 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASSIVE; 783 784 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 785 flags |= IWL_MVM_LMAC_SCAN_FLAG_PRE_CONNECTION; 786 787 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 788 flags |= IWL_MVM_LMAC_SCAN_FLAG_FRAGMENTED; 789 790 if (iwl_mvm_rrm_scan_needed(mvm)) 791 flags |= IWL_MVM_LMAC_SCAN_FLAGS_RRM_ENABLED; 792 793 if (params->pass_all) 794 flags |= IWL_MVM_LMAC_SCAN_FLAG_PASS_ALL; 795 else 796 flags |= IWL_MVM_LMAC_SCAN_FLAG_MATCH; 797 798 #ifdef CONFIG_IWLWIFI_DEBUGFS 799 if (mvm->scan_iter_notif_enabled) 800 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 801 #endif 802 803 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 804 flags |= IWL_MVM_LMAC_SCAN_FLAG_ITER_COMPLETE; 805 806 if (iwl_mvm_is_regular_scan(params) && 807 vif->type != NL80211_IFTYPE_P2P_DEVICE && 808 params->type != IWL_SCAN_TYPE_FRAGMENTED) 809 flags |= IWL_MVM_LMAC_SCAN_FLAG_EXTENDED_DWELL; 810 811 return flags; 812 } 813 814 static int iwl_mvm_scan_lmac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 815 struct iwl_mvm_scan_params *params) 816 { 817 struct iwl_scan_req_lmac *cmd = mvm->scan_cmd; 818 struct iwl_scan_probe_req *preq = 819 (void *)(cmd->data + sizeof(struct iwl_scan_channel_cfg_lmac) * 820 mvm->fw->ucode_capa.n_scan_channels); 821 u32 ssid_bitmap = 0; 822 int i; 823 824 lockdep_assert_held(&mvm->mutex); 825 826 memset(cmd, 0, ksize(cmd)); 827 828 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 829 return -EINVAL; 830 831 iwl_mvm_scan_lmac_dwell(mvm, cmd, params); 832 833 cmd->rx_chain_select = iwl_mvm_scan_rx_chain(mvm); 834 cmd->iter_num = cpu_to_le32(1); 835 cmd->n_channels = (u8)params->n_channels; 836 837 cmd->delay = cpu_to_le32(params->delay); 838 839 cmd->scan_flags = cpu_to_le32(iwl_mvm_scan_lmac_flags(mvm, params, 840 vif)); 841 842 cmd->flags = iwl_mvm_scan_rxon_flags(params->channels[0]->band); 843 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | 844 MAC_FILTER_IN_BEACON); 845 iwl_mvm_scan_fill_tx_cmd(mvm, cmd->tx_cmd, params->no_cck); 846 iwl_scan_build_ssids(params, cmd->direct_scan, &ssid_bitmap); 847 848 /* this API uses bits 1-20 instead of 0-19 */ 849 ssid_bitmap <<= 1; 850 851 for (i = 0; i < params->n_scan_plans; i++) { 852 struct cfg80211_sched_scan_plan *scan_plan = 853 ¶ms->scan_plans[i]; 854 855 cmd->schedule[i].delay = 856 cpu_to_le16(scan_plan->interval); 857 cmd->schedule[i].iterations = scan_plan->iterations; 858 cmd->schedule[i].full_scan_mul = 1; 859 } 860 861 /* 862 * If the number of iterations of the last scan plan is set to 863 * zero, it should run infinitely. However, this is not always the case. 864 * For example, when regular scan is requested the driver sets one scan 865 * plan with one iteration. 866 */ 867 if (!cmd->schedule[i - 1].iterations) 868 cmd->schedule[i - 1].iterations = 0xff; 869 870 if (iwl_mvm_scan_use_ebs(mvm, vif)) { 871 cmd->channel_opt[0].flags = 872 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 873 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 874 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 875 cmd->channel_opt[0].non_ebs_ratio = 876 cpu_to_le16(IWL_DENSE_EBS_SCAN_RATIO); 877 cmd->channel_opt[1].flags = 878 cpu_to_le16(IWL_SCAN_CHANNEL_FLAG_EBS | 879 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 880 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD); 881 cmd->channel_opt[1].non_ebs_ratio = 882 cpu_to_le16(IWL_SPARSE_EBS_SCAN_RATIO); 883 } 884 885 iwl_mvm_lmac_scan_cfg_channels(mvm, params->channels, 886 params->n_channels, ssid_bitmap, cmd); 887 888 *preq = params->preq; 889 890 return 0; 891 } 892 893 static int rate_to_scan_rate_flag(unsigned int rate) 894 { 895 static const int rate_to_scan_rate[IWL_RATE_COUNT] = { 896 [IWL_RATE_1M_INDEX] = SCAN_CONFIG_RATE_1M, 897 [IWL_RATE_2M_INDEX] = SCAN_CONFIG_RATE_2M, 898 [IWL_RATE_5M_INDEX] = SCAN_CONFIG_RATE_5M, 899 [IWL_RATE_11M_INDEX] = SCAN_CONFIG_RATE_11M, 900 [IWL_RATE_6M_INDEX] = SCAN_CONFIG_RATE_6M, 901 [IWL_RATE_9M_INDEX] = SCAN_CONFIG_RATE_9M, 902 [IWL_RATE_12M_INDEX] = SCAN_CONFIG_RATE_12M, 903 [IWL_RATE_18M_INDEX] = SCAN_CONFIG_RATE_18M, 904 [IWL_RATE_24M_INDEX] = SCAN_CONFIG_RATE_24M, 905 [IWL_RATE_36M_INDEX] = SCAN_CONFIG_RATE_36M, 906 [IWL_RATE_48M_INDEX] = SCAN_CONFIG_RATE_48M, 907 [IWL_RATE_54M_INDEX] = SCAN_CONFIG_RATE_54M, 908 }; 909 910 return rate_to_scan_rate[rate]; 911 } 912 913 static __le32 iwl_mvm_scan_config_rates(struct iwl_mvm *mvm) 914 { 915 struct ieee80211_supported_band *band; 916 unsigned int rates = 0; 917 int i; 918 919 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ]; 920 for (i = 0; i < band->n_bitrates; i++) 921 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 922 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ]; 923 for (i = 0; i < band->n_bitrates; i++) 924 rates |= rate_to_scan_rate_flag(band->bitrates[i].hw_value); 925 926 /* Set both basic rates and supported rates */ 927 rates |= SCAN_CONFIG_SUPPORTED_RATE(rates); 928 929 return cpu_to_le32(rates); 930 } 931 932 int iwl_mvm_config_scan(struct iwl_mvm *mvm) 933 { 934 struct iwl_scan_config *scan_config; 935 struct ieee80211_supported_band *band; 936 int num_channels = 937 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels + 938 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; 939 int ret, i, j = 0, cmd_size; 940 struct iwl_host_cmd cmd = { 941 .id = iwl_cmd_id(SCAN_CFG_CMD, IWL_ALWAYS_LONG_GROUP, 0), 942 }; 943 enum iwl_mvm_scan_type type = iwl_mvm_get_scan_type(mvm, false); 944 945 if (WARN_ON(num_channels > mvm->fw->ucode_capa.n_scan_channels)) 946 return -ENOBUFS; 947 948 if (type == mvm->scan_type) { 949 IWL_DEBUG_SCAN(mvm, 950 "Ignoring UMAC scan config of the same type\n"); 951 return 0; 952 } 953 954 cmd_size = sizeof(*scan_config) + mvm->fw->ucode_capa.n_scan_channels; 955 956 scan_config = kzalloc(cmd_size, GFP_KERNEL); 957 if (!scan_config) 958 return -ENOMEM; 959 960 scan_config->flags = cpu_to_le32(SCAN_CONFIG_FLAG_ACTIVATE | 961 SCAN_CONFIG_FLAG_ALLOW_CHUB_REQS | 962 SCAN_CONFIG_FLAG_SET_TX_CHAINS | 963 SCAN_CONFIG_FLAG_SET_RX_CHAINS | 964 SCAN_CONFIG_FLAG_SET_ALL_TIMES | 965 SCAN_CONFIG_FLAG_SET_LEGACY_RATES | 966 SCAN_CONFIG_FLAG_SET_MAC_ADDR | 967 SCAN_CONFIG_FLAG_SET_CHANNEL_FLAGS| 968 SCAN_CONFIG_N_CHANNELS(num_channels) | 969 (type == IWL_SCAN_TYPE_FRAGMENTED ? 970 SCAN_CONFIG_FLAG_SET_FRAGMENTED : 971 SCAN_CONFIG_FLAG_CLEAR_FRAGMENTED)); 972 scan_config->tx_chains = cpu_to_le32(iwl_mvm_get_valid_tx_ant(mvm)); 973 scan_config->rx_chains = cpu_to_le32(iwl_mvm_scan_rx_ant(mvm)); 974 scan_config->legacy_rates = iwl_mvm_scan_config_rates(mvm); 975 scan_config->out_of_channel_time = 976 cpu_to_le32(scan_timing[type].max_out_time); 977 scan_config->suspend_time = cpu_to_le32(scan_timing[type].suspend_time); 978 scan_config->dwell_active = scan_timing[type].dwell_active; 979 scan_config->dwell_passive = scan_timing[type].dwell_passive; 980 scan_config->dwell_fragmented = scan_timing[type].dwell_fragmented; 981 scan_config->dwell_extended = scan_timing[type].dwell_extended; 982 983 memcpy(&scan_config->mac_addr, &mvm->addresses[0].addr, ETH_ALEN); 984 985 scan_config->bcast_sta_id = mvm->aux_sta.sta_id; 986 scan_config->channel_flags = IWL_CHANNEL_FLAG_EBS | 987 IWL_CHANNEL_FLAG_ACCURATE_EBS | 988 IWL_CHANNEL_FLAG_EBS_ADD | 989 IWL_CHANNEL_FLAG_PRE_SCAN_PASSIVE2ACTIVE; 990 991 band = &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ]; 992 for (i = 0; i < band->n_channels; i++, j++) 993 scan_config->channel_array[j] = band->channels[i].hw_value; 994 band = &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ]; 995 for (i = 0; i < band->n_channels; i++, j++) 996 scan_config->channel_array[j] = band->channels[i].hw_value; 997 998 cmd.data[0] = scan_config; 999 cmd.len[0] = cmd_size; 1000 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; 1001 1002 IWL_DEBUG_SCAN(mvm, "Sending UMAC scan config\n"); 1003 1004 ret = iwl_mvm_send_cmd(mvm, &cmd); 1005 if (!ret) 1006 mvm->scan_type = type; 1007 1008 kfree(scan_config); 1009 return ret; 1010 } 1011 1012 static int iwl_mvm_scan_uid_by_status(struct iwl_mvm *mvm, int status) 1013 { 1014 int i; 1015 1016 for (i = 0; i < mvm->max_scans; i++) 1017 if (mvm->scan_uid_status[i] == status) 1018 return i; 1019 1020 return -ENOENT; 1021 } 1022 1023 static void iwl_mvm_scan_umac_dwell(struct iwl_mvm *mvm, 1024 struct iwl_scan_req_umac *cmd, 1025 struct iwl_mvm_scan_params *params) 1026 { 1027 cmd->extended_dwell = scan_timing[params->type].dwell_extended; 1028 cmd->active_dwell = scan_timing[params->type].dwell_active; 1029 cmd->passive_dwell = scan_timing[params->type].dwell_passive; 1030 cmd->fragmented_dwell = scan_timing[params->type].dwell_fragmented; 1031 cmd->max_out_time = cpu_to_le32(scan_timing[params->type].max_out_time); 1032 cmd->suspend_time = cpu_to_le32(scan_timing[params->type].suspend_time); 1033 cmd->scan_priority = 1034 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 1035 1036 if (iwl_mvm_is_regular_scan(params)) 1037 cmd->ooc_priority = 1038 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_6); 1039 else 1040 cmd->ooc_priority = 1041 iwl_mvm_scan_priority(mvm, IWL_SCAN_PRIORITY_EXT_2); 1042 } 1043 1044 static void 1045 iwl_mvm_umac_scan_cfg_channels(struct iwl_mvm *mvm, 1046 struct ieee80211_channel **channels, 1047 int n_channels, u32 ssid_bitmap, 1048 struct iwl_scan_req_umac *cmd) 1049 { 1050 struct iwl_scan_channel_cfg_umac *channel_cfg = (void *)&cmd->data; 1051 int i; 1052 1053 for (i = 0; i < n_channels; i++) { 1054 channel_cfg[i].flags = cpu_to_le32(ssid_bitmap); 1055 channel_cfg[i].channel_num = channels[i]->hw_value; 1056 channel_cfg[i].iter_count = 1; 1057 channel_cfg[i].iter_interval = 0; 1058 } 1059 } 1060 1061 static u32 iwl_mvm_scan_umac_flags(struct iwl_mvm *mvm, 1062 struct iwl_mvm_scan_params *params, 1063 struct ieee80211_vif *vif) 1064 { 1065 int flags = 0; 1066 1067 if (params->n_ssids == 0) 1068 flags = IWL_UMAC_SCAN_GEN_FLAGS_PASSIVE; 1069 1070 if (params->n_ssids == 1 && params->ssids[0].ssid_len != 0) 1071 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PRE_CONNECT; 1072 1073 if (params->type == IWL_SCAN_TYPE_FRAGMENTED) 1074 flags |= IWL_UMAC_SCAN_GEN_FLAGS_FRAGMENTED; 1075 1076 if (iwl_mvm_rrm_scan_needed(mvm)) 1077 flags |= IWL_UMAC_SCAN_GEN_FLAGS_RRM_ENABLED; 1078 1079 if (params->pass_all) 1080 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PASS_ALL; 1081 else 1082 flags |= IWL_UMAC_SCAN_GEN_FLAGS_MATCH; 1083 1084 if (!iwl_mvm_is_regular_scan(params)) 1085 flags |= IWL_UMAC_SCAN_GEN_FLAGS_PERIODIC; 1086 1087 #ifdef CONFIG_IWLWIFI_DEBUGFS 1088 if (mvm->scan_iter_notif_enabled) 1089 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1090 #endif 1091 1092 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_ENABLED) 1093 flags |= IWL_UMAC_SCAN_GEN_FLAGS_ITER_COMPLETE; 1094 1095 if (iwl_mvm_is_regular_scan(params) && 1096 vif->type != NL80211_IFTYPE_P2P_DEVICE && 1097 params->type != IWL_SCAN_TYPE_FRAGMENTED) 1098 flags |= IWL_UMAC_SCAN_GEN_FLAGS_EXTENDED_DWELL; 1099 1100 return flags; 1101 } 1102 1103 static int iwl_mvm_scan_umac(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1104 struct iwl_mvm_scan_params *params, 1105 int type) 1106 { 1107 struct iwl_scan_req_umac *cmd = mvm->scan_cmd; 1108 struct iwl_scan_req_umac_tail *sec_part = (void *)&cmd->data + 1109 sizeof(struct iwl_scan_channel_cfg_umac) * 1110 mvm->fw->ucode_capa.n_scan_channels; 1111 int uid, i; 1112 u32 ssid_bitmap = 0; 1113 1114 lockdep_assert_held(&mvm->mutex); 1115 1116 if (WARN_ON(params->n_scan_plans > IWL_MAX_SCHED_SCAN_PLANS)) 1117 return -EINVAL; 1118 1119 uid = iwl_mvm_scan_uid_by_status(mvm, 0); 1120 if (uid < 0) 1121 return uid; 1122 1123 memset(cmd, 0, ksize(cmd)); 1124 1125 iwl_mvm_scan_umac_dwell(mvm, cmd, params); 1126 1127 mvm->scan_uid_status[uid] = type; 1128 1129 cmd->uid = cpu_to_le32(uid); 1130 cmd->general_flags = cpu_to_le32(iwl_mvm_scan_umac_flags(mvm, params, 1131 vif)); 1132 1133 if (type == IWL_MVM_SCAN_SCHED || type == IWL_MVM_SCAN_NETDETECT) 1134 cmd->flags = cpu_to_le32(IWL_UMAC_SCAN_FLAG_PREEMPTIVE); 1135 1136 if (iwl_mvm_scan_use_ebs(mvm, vif)) 1137 cmd->channel_flags = IWL_SCAN_CHANNEL_FLAG_EBS | 1138 IWL_SCAN_CHANNEL_FLAG_EBS_ACCURATE | 1139 IWL_SCAN_CHANNEL_FLAG_CACHE_ADD; 1140 1141 cmd->n_channels = params->n_channels; 1142 1143 iwl_scan_build_ssids(params, sec_part->direct_scan, &ssid_bitmap); 1144 1145 iwl_mvm_umac_scan_cfg_channels(mvm, params->channels, 1146 params->n_channels, ssid_bitmap, cmd); 1147 1148 for (i = 0; i < params->n_scan_plans; i++) { 1149 struct cfg80211_sched_scan_plan *scan_plan = 1150 ¶ms->scan_plans[i]; 1151 1152 sec_part->schedule[i].iter_count = scan_plan->iterations; 1153 sec_part->schedule[i].interval = 1154 cpu_to_le16(scan_plan->interval); 1155 } 1156 1157 /* 1158 * If the number of iterations of the last scan plan is set to 1159 * zero, it should run infinitely. However, this is not always the case. 1160 * For example, when regular scan is requested the driver sets one scan 1161 * plan with one iteration. 1162 */ 1163 if (!sec_part->schedule[i - 1].iter_count) 1164 sec_part->schedule[i - 1].iter_count = 0xff; 1165 1166 sec_part->delay = cpu_to_le16(params->delay); 1167 sec_part->preq = params->preq; 1168 1169 return 0; 1170 } 1171 1172 static int iwl_mvm_num_scans(struct iwl_mvm *mvm) 1173 { 1174 return hweight32(mvm->scan_status & IWL_MVM_SCAN_MASK); 1175 } 1176 1177 static int iwl_mvm_check_running_scans(struct iwl_mvm *mvm, int type) 1178 { 1179 /* This looks a bit arbitrary, but the idea is that if we run 1180 * out of possible simultaneous scans and the userspace is 1181 * trying to run a scan type that is already running, we 1182 * return -EBUSY. But if the userspace wants to start a 1183 * different type of scan, we stop the opposite type to make 1184 * space for the new request. The reason is backwards 1185 * compatibility with old wpa_supplicant that wouldn't stop a 1186 * scheduled scan before starting a normal scan. 1187 */ 1188 1189 if (iwl_mvm_num_scans(mvm) < mvm->max_scans) 1190 return 0; 1191 1192 /* Use a switch, even though this is a bitmask, so that more 1193 * than one bits set will fall in default and we will warn. 1194 */ 1195 switch (type) { 1196 case IWL_MVM_SCAN_REGULAR: 1197 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR_MASK) 1198 return -EBUSY; 1199 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true); 1200 case IWL_MVM_SCAN_SCHED: 1201 if (mvm->scan_status & IWL_MVM_SCAN_SCHED_MASK) 1202 return -EBUSY; 1203 return iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true); 1204 case IWL_MVM_SCAN_NETDETECT: 1205 /* No need to stop anything for net-detect since the 1206 * firmware is restarted anyway. This way, any sched 1207 * scans that were running will be restarted when we 1208 * resume. 1209 */ 1210 return 0; 1211 default: 1212 WARN_ON(1); 1213 break; 1214 } 1215 1216 return -EIO; 1217 } 1218 1219 int iwl_mvm_reg_scan_start(struct iwl_mvm *mvm, struct ieee80211_vif *vif, 1220 struct cfg80211_scan_request *req, 1221 struct ieee80211_scan_ies *ies) 1222 { 1223 struct iwl_host_cmd hcmd = { 1224 .len = { iwl_mvm_scan_size(mvm), }, 1225 .data = { mvm->scan_cmd, }, 1226 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1227 }; 1228 struct iwl_mvm_scan_params params = {}; 1229 int ret; 1230 struct cfg80211_sched_scan_plan scan_plan = { .iterations = 1 }; 1231 1232 lockdep_assert_held(&mvm->mutex); 1233 1234 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1235 IWL_ERR(mvm, "scan while LAR regdomain is not set\n"); 1236 return -EBUSY; 1237 } 1238 1239 ret = iwl_mvm_check_running_scans(mvm, IWL_MVM_SCAN_REGULAR); 1240 if (ret) 1241 return ret; 1242 1243 /* we should have failed registration if scan_cmd was NULL */ 1244 if (WARN_ON(!mvm->scan_cmd)) 1245 return -ENOMEM; 1246 1247 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1248 return -ENOBUFS; 1249 1250 params.n_ssids = req->n_ssids; 1251 params.flags = req->flags; 1252 params.n_channels = req->n_channels; 1253 params.delay = 0; 1254 params.ssids = req->ssids; 1255 params.channels = req->channels; 1256 params.mac_addr = req->mac_addr; 1257 params.mac_addr_mask = req->mac_addr_mask; 1258 params.no_cck = req->no_cck; 1259 params.pass_all = true; 1260 params.n_match_sets = 0; 1261 params.match_sets = NULL; 1262 1263 params.scan_plans = &scan_plan; 1264 params.n_scan_plans = 1; 1265 1266 params.type = 1267 iwl_mvm_get_scan_type(mvm, 1268 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1269 1270 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1271 1272 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1273 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1274 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, 1275 IWL_MVM_SCAN_REGULAR); 1276 } else { 1277 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1278 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1279 } 1280 1281 if (ret) 1282 return ret; 1283 1284 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1285 if (ret) { 1286 /* If the scan failed, it usually means that the FW was unable 1287 * to allocate the time events. Warn on it, but maybe we 1288 * should try to send the command again with different params. 1289 */ 1290 IWL_ERR(mvm, "Scan failed! ret %d\n", ret); 1291 return ret; 1292 } 1293 1294 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); 1295 mvm->scan_status |= IWL_MVM_SCAN_REGULAR; 1296 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN); 1297 1298 return 0; 1299 } 1300 1301 int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, 1302 struct ieee80211_vif *vif, 1303 struct cfg80211_sched_scan_request *req, 1304 struct ieee80211_scan_ies *ies, 1305 int type) 1306 { 1307 struct iwl_host_cmd hcmd = { 1308 .len = { iwl_mvm_scan_size(mvm), }, 1309 .data = { mvm->scan_cmd, }, 1310 .dataflags = { IWL_HCMD_DFL_NOCOPY, }, 1311 }; 1312 struct iwl_mvm_scan_params params = {}; 1313 int ret; 1314 1315 lockdep_assert_held(&mvm->mutex); 1316 1317 if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) { 1318 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n"); 1319 return -EBUSY; 1320 } 1321 1322 ret = iwl_mvm_check_running_scans(mvm, type); 1323 if (ret) 1324 return ret; 1325 1326 /* we should have failed registration if scan_cmd was NULL */ 1327 if (WARN_ON(!mvm->scan_cmd)) 1328 return -ENOMEM; 1329 1330 if (!iwl_mvm_scan_fits(mvm, req->n_ssids, ies, req->n_channels)) 1331 return -ENOBUFS; 1332 1333 params.n_ssids = req->n_ssids; 1334 params.flags = req->flags; 1335 params.n_channels = req->n_channels; 1336 params.ssids = req->ssids; 1337 params.channels = req->channels; 1338 params.mac_addr = req->mac_addr; 1339 params.mac_addr_mask = req->mac_addr_mask; 1340 params.no_cck = false; 1341 params.pass_all = iwl_mvm_scan_pass_all(mvm, req); 1342 params.n_match_sets = req->n_match_sets; 1343 params.match_sets = req->match_sets; 1344 if (!req->n_scan_plans) 1345 return -EINVAL; 1346 1347 params.n_scan_plans = req->n_scan_plans; 1348 params.scan_plans = req->scan_plans; 1349 1350 params.type = 1351 iwl_mvm_get_scan_type(mvm, 1352 vif->type == NL80211_IFTYPE_P2P_DEVICE); 1353 1354 /* In theory, LMAC scans can handle a 32-bit delay, but since 1355 * waiting for over 18 hours to start the scan is a bit silly 1356 * and to keep it aligned with UMAC scans (which only support 1357 * 16-bit delays), trim it down to 16-bits. 1358 */ 1359 if (req->delay > U16_MAX) { 1360 IWL_DEBUG_SCAN(mvm, 1361 "delay value is > 16-bits, set to max possible\n"); 1362 params.delay = U16_MAX; 1363 } else { 1364 params.delay = req->delay; 1365 } 1366 1367 ret = iwl_mvm_config_sched_scan_profiles(mvm, req); 1368 if (ret) 1369 return ret; 1370 1371 iwl_mvm_build_scan_probe(mvm, vif, ies, ¶ms); 1372 1373 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1374 hcmd.id = iwl_cmd_id(SCAN_REQ_UMAC, IWL_ALWAYS_LONG_GROUP, 0); 1375 ret = iwl_mvm_scan_umac(mvm, vif, ¶ms, type); 1376 } else { 1377 hcmd.id = SCAN_OFFLOAD_REQUEST_CMD; 1378 ret = iwl_mvm_scan_lmac(mvm, vif, ¶ms); 1379 } 1380 1381 if (ret) 1382 return ret; 1383 1384 ret = iwl_mvm_send_cmd(mvm, &hcmd); 1385 if (!ret) { 1386 IWL_DEBUG_SCAN(mvm, 1387 "Sched scan request was sent successfully\n"); 1388 mvm->scan_status |= type; 1389 } else { 1390 /* If the scan failed, it usually means that the FW was unable 1391 * to allocate the time events. Warn on it, but maybe we 1392 * should try to send the command again with different params. 1393 */ 1394 IWL_ERR(mvm, "Sched scan failed! ret %d\n", ret); 1395 } 1396 1397 return ret; 1398 } 1399 1400 void iwl_mvm_rx_umac_scan_complete_notif(struct iwl_mvm *mvm, 1401 struct iwl_rx_cmd_buffer *rxb) 1402 { 1403 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1404 struct iwl_umac_scan_complete *notif = (void *)pkt->data; 1405 u32 uid = __le32_to_cpu(notif->uid); 1406 bool aborted = (notif->status == IWL_SCAN_OFFLOAD_ABORTED); 1407 1408 if (WARN_ON(!(mvm->scan_uid_status[uid] & mvm->scan_status))) 1409 return; 1410 1411 /* if the scan is already stopping, we don't need to notify mac80211 */ 1412 if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_REGULAR) { 1413 ieee80211_scan_completed(mvm->hw, aborted); 1414 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1415 } else if (mvm->scan_uid_status[uid] == IWL_MVM_SCAN_SCHED) { 1416 ieee80211_sched_scan_stopped(mvm->hw); 1417 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1418 } 1419 1420 mvm->scan_status &= ~mvm->scan_uid_status[uid]; 1421 IWL_DEBUG_SCAN(mvm, 1422 "Scan completed, uid %u type %u, status %s, EBS status %s\n", 1423 uid, mvm->scan_uid_status[uid], 1424 notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? 1425 "completed" : "aborted", 1426 iwl_mvm_ebs_status_str(notif->ebs_status)); 1427 IWL_DEBUG_SCAN(mvm, 1428 "Last line %d, Last iteration %d, Time from last iteration %d\n", 1429 notif->last_schedule, notif->last_iter, 1430 __le32_to_cpu(notif->time_from_last_iter)); 1431 1432 if (notif->ebs_status != IWL_SCAN_EBS_SUCCESS && 1433 notif->ebs_status != IWL_SCAN_EBS_INACTIVE) 1434 mvm->last_ebs_successful = false; 1435 1436 mvm->scan_uid_status[uid] = 0; 1437 } 1438 1439 void iwl_mvm_rx_umac_scan_iter_complete_notif(struct iwl_mvm *mvm, 1440 struct iwl_rx_cmd_buffer *rxb) 1441 { 1442 struct iwl_rx_packet *pkt = rxb_addr(rxb); 1443 struct iwl_umac_scan_iter_complete_notif *notif = (void *)pkt->data; 1444 u8 buf[256]; 1445 1446 IWL_DEBUG_SCAN(mvm, 1447 "UMAC Scan iteration complete: status=0x%x scanned_channels=%d channels list: %s\n", 1448 notif->status, notif->scanned_channels, 1449 iwl_mvm_dump_channel_list(notif->results, 1450 notif->scanned_channels, buf, 1451 sizeof(buf))); 1452 1453 if (mvm->sched_scan_pass_all == SCHED_SCAN_PASS_ALL_FOUND) { 1454 IWL_DEBUG_SCAN(mvm, "Pass all scheduled scan results found\n"); 1455 ieee80211_sched_scan_results(mvm->hw); 1456 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_ENABLED; 1457 } 1458 } 1459 1460 static int iwl_mvm_umac_scan_abort(struct iwl_mvm *mvm, int type) 1461 { 1462 struct iwl_umac_scan_abort cmd = {}; 1463 int uid, ret; 1464 1465 lockdep_assert_held(&mvm->mutex); 1466 1467 /* We should always get a valid index here, because we already 1468 * checked that this type of scan was running in the generic 1469 * code. 1470 */ 1471 uid = iwl_mvm_scan_uid_by_status(mvm, type); 1472 if (WARN_ON_ONCE(uid < 0)) 1473 return uid; 1474 1475 cmd.uid = cpu_to_le32(uid); 1476 1477 IWL_DEBUG_SCAN(mvm, "Sending scan abort, uid %u\n", uid); 1478 1479 ret = iwl_mvm_send_cmd_pdu(mvm, 1480 iwl_cmd_id(SCAN_ABORT_UMAC, 1481 IWL_ALWAYS_LONG_GROUP, 0), 1482 0, sizeof(cmd), &cmd); 1483 if (!ret) 1484 mvm->scan_uid_status[uid] = type << IWL_MVM_SCAN_STOPPING_SHIFT; 1485 1486 return ret; 1487 } 1488 1489 static int iwl_mvm_scan_stop_wait(struct iwl_mvm *mvm, int type) 1490 { 1491 struct iwl_notification_wait wait_scan_done; 1492 static const u16 scan_done_notif[] = { SCAN_COMPLETE_UMAC, 1493 SCAN_OFFLOAD_COMPLETE, }; 1494 int ret; 1495 1496 lockdep_assert_held(&mvm->mutex); 1497 1498 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, 1499 scan_done_notif, 1500 ARRAY_SIZE(scan_done_notif), 1501 NULL, NULL); 1502 1503 IWL_DEBUG_SCAN(mvm, "Preparing to stop scan, type %x\n", type); 1504 1505 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1506 ret = iwl_mvm_umac_scan_abort(mvm, type); 1507 else 1508 ret = iwl_mvm_lmac_scan_abort(mvm); 1509 1510 if (ret) { 1511 IWL_DEBUG_SCAN(mvm, "couldn't stop scan type %d\n", type); 1512 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); 1513 return ret; 1514 } 1515 1516 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); 1517 1518 return ret; 1519 } 1520 1521 int iwl_mvm_scan_size(struct iwl_mvm *mvm) 1522 { 1523 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) 1524 return sizeof(struct iwl_scan_req_umac) + 1525 sizeof(struct iwl_scan_channel_cfg_umac) * 1526 mvm->fw->ucode_capa.n_scan_channels + 1527 sizeof(struct iwl_scan_req_umac_tail); 1528 1529 return sizeof(struct iwl_scan_req_lmac) + 1530 sizeof(struct iwl_scan_channel_cfg_lmac) * 1531 mvm->fw->ucode_capa.n_scan_channels + 1532 sizeof(struct iwl_scan_probe_req); 1533 } 1534 1535 /* 1536 * This function is used in nic restart flow, to inform mac80211 about scans 1537 * that was aborted by restart flow or by an assert. 1538 */ 1539 void iwl_mvm_report_scan_aborted(struct iwl_mvm *mvm) 1540 { 1541 if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) { 1542 int uid, i; 1543 1544 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_REGULAR); 1545 if (uid >= 0) { 1546 ieee80211_scan_completed(mvm->hw, true); 1547 mvm->scan_uid_status[uid] = 0; 1548 } 1549 uid = iwl_mvm_scan_uid_by_status(mvm, IWL_MVM_SCAN_SCHED); 1550 if (uid >= 0 && !mvm->restart_fw) { 1551 ieee80211_sched_scan_stopped(mvm->hw); 1552 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1553 mvm->scan_uid_status[uid] = 0; 1554 } 1555 1556 /* We shouldn't have any UIDs still set. Loop over all the 1557 * UIDs to make sure there's nothing left there and warn if 1558 * any is found. 1559 */ 1560 for (i = 0; i < mvm->max_scans; i++) { 1561 if (WARN_ONCE(mvm->scan_uid_status[i], 1562 "UMAC scan UID %d status was not cleaned\n", 1563 i)) 1564 mvm->scan_uid_status[i] = 0; 1565 } 1566 } else { 1567 if (mvm->scan_status & IWL_MVM_SCAN_REGULAR) 1568 ieee80211_scan_completed(mvm->hw, true); 1569 1570 /* Sched scan will be restarted by mac80211 in 1571 * restart_hw, so do not report if FW is about to be 1572 * restarted. 1573 */ 1574 if ((mvm->scan_status & IWL_MVM_SCAN_SCHED) && 1575 !mvm->restart_fw) { 1576 ieee80211_sched_scan_stopped(mvm->hw); 1577 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1578 } 1579 } 1580 } 1581 1582 int iwl_mvm_scan_stop(struct iwl_mvm *mvm, int type, bool notify) 1583 { 1584 int ret; 1585 1586 if (!(mvm->scan_status & type)) 1587 return 0; 1588 1589 if (iwl_mvm_is_radio_killed(mvm)) { 1590 ret = 0; 1591 goto out; 1592 } 1593 1594 ret = iwl_mvm_scan_stop_wait(mvm, type); 1595 if (!ret) 1596 mvm->scan_status |= type << IWL_MVM_SCAN_STOPPING_SHIFT; 1597 out: 1598 /* Clear the scan status so the next scan requests will 1599 * succeed and mark the scan as stopping, so that the Rx 1600 * handler doesn't do anything, as the scan was stopped from 1601 * above. 1602 */ 1603 mvm->scan_status &= ~type; 1604 1605 if (type == IWL_MVM_SCAN_REGULAR) { 1606 /* Since the rx handler won't do anything now, we have 1607 * to release the scan reference here. 1608 */ 1609 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); 1610 if (notify) 1611 ieee80211_scan_completed(mvm->hw, true); 1612 } else if (notify) { 1613 ieee80211_sched_scan_stopped(mvm->hw); 1614 mvm->sched_scan_pass_all = SCHED_SCAN_PASS_ALL_DISABLED; 1615 } 1616 1617 return ret; 1618 } 1619