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