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