1 /* 2 * Copyright (c) 2017-2019 The Linux Foundation. All rights reserved. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for 5 * any purpose with or without fee is hereby granted, provided that the 6 * above copyright notice and this permission notice appear in all 7 * copies. 8 * 9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL 10 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED 11 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE 12 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL 13 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR 14 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER 15 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /** 20 * DOC: defines driver functions interfacing with linux kernel 21 */ 22 23 #include <qdf_list.h> 24 #include <qdf_status.h> 25 #include <qdf_module.h> 26 #include <linux/wireless.h> 27 #include <linux/netdevice.h> 28 #include <net/cfg80211.h> 29 #include <wlan_scan_utils_api.h> 30 #include <wlan_cfg80211.h> 31 #include <wlan_cfg80211_scan.h> 32 #include <wlan_osif_priv.h> 33 #include <wlan_scan_public_structs.h> 34 #include <wlan_scan_ucfg_api.h> 35 #include <wlan_cfg80211_scan.h> 36 #include <qdf_mem.h> 37 #include <wlan_utility.h> 38 #include "cfg_ucfg_api.h" 39 #ifdef WLAN_POLICY_MGR_ENABLE 40 #include <wlan_policy_mgr_api.h> 41 #endif 42 #include <wlan_reg_services_api.h> 43 #ifdef FEATURE_WLAN_DIAG_SUPPORT 44 #include "host_diag_core_event.h" 45 #endif 46 47 static const 48 struct nla_policy scan_policy[QCA_WLAN_VENDOR_ATTR_SCAN_MAX + 1] = { 49 [QCA_WLAN_VENDOR_ATTR_SCAN_FLAGS] = {.type = NLA_U32}, 50 [QCA_WLAN_VENDOR_ATTR_SCAN_TX_NO_CCK_RATE] = {.type = NLA_FLAG}, 51 [QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE] = {.type = NLA_U64}, 52 }; 53 54 #if defined(CFG80211_SCAN_RANDOM_MAC_ADDR) || \ 55 (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)) 56 /** 57 * wlan_fill_scan_rand_attrs() - Populate the scan randomization attrs 58 * @vdev: pointer to objmgr vdev 59 * @flags: cfg80211 scan flags 60 * @mac_addr: random mac addr from cfg80211 61 * @mac_addr_mask: mac addr mask from cfg80211 62 * @randomize: output variable to check scan randomization status 63 * @addr: output variable to hold random addr 64 * @mask: output variable to hold mac mask 65 * 66 * Return: None 67 */ 68 static void wlan_fill_scan_rand_attrs(struct wlan_objmgr_vdev *vdev, 69 uint32_t flags, 70 uint8_t *mac_addr, 71 uint8_t *mac_addr_mask, 72 bool *randomize, 73 uint8_t *addr, 74 uint8_t *mask) 75 { 76 *randomize = false; 77 if (!(flags & NL80211_SCAN_FLAG_RANDOM_ADDR)) 78 return; 79 80 if (wlan_vdev_mlme_get_opmode(vdev) != QDF_STA_MODE) 81 return; 82 83 if (wlan_vdev_is_up(vdev) == QDF_STATUS_SUCCESS) 84 return; 85 86 *randomize = true; 87 memcpy(addr, mac_addr, QDF_MAC_ADDR_SIZE); 88 memcpy(mask, mac_addr_mask, QDF_MAC_ADDR_SIZE); 89 osif_debug("Random mac addr: %pM and Random mac mask: %pM", 90 addr, mask); 91 } 92 93 /** 94 * wlan_scan_rand_attrs() - Wrapper function to fill scan random attrs 95 * @vdev: pointer to objmgr vdev 96 * @request: pointer to cfg80211 scan request 97 * @req: pointer to cmn module scan request 98 * 99 * This is a wrapper function which invokes wlan_fill_scan_rand_attrs() 100 * to fill random attributes of internal scan request with cfg80211_scan_request 101 * 102 * Return: None 103 */ 104 static void wlan_scan_rand_attrs(struct wlan_objmgr_vdev *vdev, 105 struct cfg80211_scan_request *request, 106 struct scan_start_request *req) 107 { 108 bool *randomize = &req->scan_req.scan_random.randomize; 109 uint8_t *mac_addr = req->scan_req.scan_random.mac_addr; 110 uint8_t *mac_mask = req->scan_req.scan_random.mac_mask; 111 112 wlan_fill_scan_rand_attrs(vdev, request->flags, request->mac_addr, 113 request->mac_addr_mask, randomize, mac_addr, 114 mac_mask); 115 if (!*randomize) 116 return; 117 118 req->scan_req.scan_f_add_spoofed_mac_in_probe = true; 119 req->scan_req.scan_f_add_rand_seq_in_probe = true; 120 } 121 #else 122 /** 123 * wlan_scan_rand_attrs() - Wrapper function to fill scan random attrs 124 * @vdev: pointer to objmgr vdev 125 * @request: pointer to cfg80211 scan request 126 * @req: pointer to cmn module scan request 127 * 128 * This is a wrapper function which invokes wlan_fill_scan_rand_attrs() 129 * to fill random attributes of internal scan request with cfg80211_scan_request 130 * 131 * Return: None 132 */ 133 static void wlan_scan_rand_attrs(struct wlan_objmgr_vdev *vdev, 134 struct cfg80211_scan_request *request, 135 struct scan_start_request *req) 136 { 137 } 138 #endif 139 140 #ifdef FEATURE_WLAN_SCAN_PNO 141 #if ((LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)) || \ 142 defined(CFG80211_MULTI_SCAN_PLAN_BACKPORT)) 143 144 /** 145 * wlan_config_sched_scan_plan() - configures the sched scan plans 146 * from the framework. 147 * @pno_req: pointer to PNO scan request 148 * @request: pointer to scan request from framework 149 * 150 * Return: None 151 */ 152 static void 153 wlan_config_sched_scan_plan(struct pno_scan_req_params *pno_req, 154 struct cfg80211_sched_scan_request *request) 155 { 156 /* 157 * As of now max 2 scan plans were supported by firmware 158 * if number of scan plan supported by firmware increased below logic 159 * must change. 160 */ 161 if (request->n_scan_plans == SCAN_PNO_MAX_PLAN_REQUEST) { 162 pno_req->fast_scan_period = 163 request->scan_plans[0].interval * MSEC_PER_SEC; 164 pno_req->fast_scan_max_cycles = 165 request->scan_plans[0].iterations; 166 pno_req->slow_scan_period = 167 request->scan_plans[1].interval * MSEC_PER_SEC; 168 } else if (request->n_scan_plans == 1) { 169 pno_req->fast_scan_period = 170 request->scan_plans[0].interval * MSEC_PER_SEC; 171 /* 172 * if only one scan plan is configured from framework 173 * then both fast and slow scan should be configured with the 174 * same value that is why fast scan cycles are hardcoded to one 175 */ 176 pno_req->fast_scan_max_cycles = 1; 177 pno_req->slow_scan_period = 178 request->scan_plans[0].interval * MSEC_PER_SEC; 179 } else { 180 osif_err("Invalid number of scan plans %d !!", 181 request->n_scan_plans); 182 } 183 } 184 #else 185 #define wlan_config_sched_scan_plan(pno_req, request) \ 186 __wlan_config_sched_scan_plan(pno_req, request, psoc) 187 188 static void 189 __wlan_config_sched_scan_plan(struct pno_scan_req_params *pno_req, 190 struct cfg80211_sched_scan_request *request, 191 struct wlan_objmgr_psoc *psoc) 192 { 193 uint32_t scan_timer_repeat_value, slow_scan_multiplier; 194 195 scan_timer_repeat_value = ucfg_scan_get_scan_timer_repeat_value(psoc); 196 slow_scan_multiplier = ucfg_scan_get_slow_scan_multiplier(psoc); 197 198 pno_req->fast_scan_period = request->interval; 199 pno_req->fast_scan_max_cycles = scan_timer_repeat_value; 200 pno_req->slow_scan_period = 201 (slow_scan_multiplier * pno_req->fast_scan_period); 202 osif_debug("Base scan interval: %d sec PNO Scan Timer Repeat Value: %d", 203 (request->interval / 1000), scan_timer_repeat_value); 204 } 205 #endif 206 207 #if LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0) 208 static inline void 209 wlan_cfg80211_sched_scan_results(struct wiphy *wiphy, uint64_t reqid) 210 { 211 cfg80211_sched_scan_results(wiphy); 212 } 213 #else 214 static inline void 215 wlan_cfg80211_sched_scan_results(struct wiphy *wiphy, uint64_t reqid) 216 { 217 cfg80211_sched_scan_results(wiphy, reqid); 218 } 219 #endif 220 221 /** 222 * wlan_cfg80211_pno_callback() - pno callback function to handle 223 * pno events. 224 * @vdev: vdev ptr 225 * @event: scan events 226 * @args: argument 227 * 228 * Return: void 229 */ 230 static void wlan_cfg80211_pno_callback(struct wlan_objmgr_vdev *vdev, 231 struct scan_event *event, 232 void *args) 233 { 234 struct wlan_objmgr_pdev *pdev; 235 struct pdev_osif_priv *pdev_ospriv; 236 237 if (event->type != SCAN_EVENT_TYPE_NLO_COMPLETE) 238 return; 239 240 osif_debug("vdev id = %d", event->vdev_id); 241 242 pdev = wlan_vdev_get_pdev(vdev); 243 if (!pdev) { 244 osif_err("pdev is NULL"); 245 return; 246 } 247 248 pdev_ospriv = wlan_pdev_get_ospriv(pdev); 249 if (!pdev_ospriv) { 250 osif_err("pdev_ospriv is NULL"); 251 return; 252 } 253 wlan_cfg80211_sched_scan_results(pdev_ospriv->wiphy, 0); 254 } 255 256 #ifdef WLAN_POLICY_MGR_ENABLE 257 static bool wlan_cfg80211_is_ap_go_present(struct wlan_objmgr_psoc *psoc) 258 { 259 return policy_mgr_mode_specific_connection_count(psoc, 260 PM_SAP_MODE, 261 NULL) || 262 policy_mgr_mode_specific_connection_count(psoc, 263 PM_P2P_GO_MODE, 264 NULL); 265 } 266 267 static QDF_STATUS wlan_cfg80211_is_chan_ok_for_dnbs( 268 struct wlan_objmgr_psoc *psoc, 269 u16 chan_freq, bool *ok) 270 { 271 QDF_STATUS status = policy_mgr_is_chan_ok_for_dnbs( 272 psoc, chan_freq, ok); 273 274 if (QDF_IS_STATUS_ERROR(status)) { 275 osif_err("DNBS check failed"); 276 return status; 277 } 278 279 return QDF_STATUS_SUCCESS; 280 } 281 #else 282 static bool wlan_cfg80211_is_ap_go_present(struct wlan_objmgr_psoc *psoc) 283 { 284 return false; 285 } 286 287 static QDF_STATUS wlan_cfg80211_is_chan_ok_for_dnbs( 288 struct wlan_objmgr_psoc *psoc, 289 u16 chan_freq, 290 bool *ok) 291 { 292 if (!ok) 293 return QDF_STATUS_E_INVAL; 294 295 *ok = true; 296 return QDF_STATUS_SUCCESS; 297 } 298 #endif 299 300 #if defined(CFG80211_SCAN_RANDOM_MAC_ADDR) || \ 301 (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)) 302 /** 303 * wlan_pno_scan_rand_attr() - Wrapper function to fill sched scan random attrs 304 * @vdev: pointer to objmgr vdev 305 * @request: pointer to cfg80211 sched scan request 306 * @req: pointer to cmn module pno scan request 307 * 308 * This is a wrapper function which invokes wlan_fill_scan_rand_attrs() 309 * to fill random attributes of internal pno scan 310 * with cfg80211_sched_scan_request 311 * 312 * Return: None 313 */ 314 static void wlan_pno_scan_rand_attr(struct wlan_objmgr_vdev *vdev, 315 struct cfg80211_sched_scan_request *request, 316 struct pno_scan_req_params *req) 317 { 318 bool *randomize = &req->scan_random.randomize; 319 uint8_t *mac_addr = req->scan_random.mac_addr; 320 uint8_t *mac_mask = req->scan_random.mac_mask; 321 322 wlan_fill_scan_rand_attrs(vdev, request->flags, request->mac_addr, 323 request->mac_addr_mask, randomize, mac_addr, 324 mac_mask); 325 } 326 #else 327 /** 328 * wlan_pno_scan_rand_attr() - Wrapper function to fill sched scan random attrs 329 * @vdev: pointer to objmgr vdev 330 * @request: pointer to cfg80211 sched scan request 331 * @req: pointer to cmn module pno scan request 332 * 333 * This is a wrapper function which invokes wlan_fill_scan_rand_attrs() 334 * to fill random attributes of internal pno scan 335 * with cfg80211_sched_scan_request 336 * 337 * Return: None 338 */ 339 static void wlan_pno_scan_rand_attr(struct wlan_objmgr_vdev *vdev, 340 struct cfg80211_sched_scan_request *request, 341 struct pno_scan_req_params *req) 342 { 343 } 344 #endif 345 346 /** 347 * wlan_hdd_sched_scan_update_relative_rssi() - update CPNO params 348 * @pno_request: pointer to PNO scan request 349 * @request: Pointer to cfg80211 scheduled scan start request 350 * 351 * This function is used to update Connected PNO params sent by kernel 352 * 353 * Return: None 354 */ 355 #if defined(CFG80211_REPORT_BETTER_BSS_IN_SCHED_SCAN) || \ 356 (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)) 357 static inline void wlan_hdd_sched_scan_update_relative_rssi( 358 struct pno_scan_req_params *pno_request, 359 struct cfg80211_sched_scan_request *request) 360 { 361 pno_request->relative_rssi_set = request->relative_rssi_set; 362 pno_request->relative_rssi = request->relative_rssi; 363 if (NL80211_BAND_2GHZ == request->rssi_adjust.band) 364 pno_request->band_rssi_pref.band = WLAN_BAND_2_4_GHZ; 365 else if (NL80211_BAND_5GHZ == request->rssi_adjust.band) 366 pno_request->band_rssi_pref.band = WLAN_BAND_5_GHZ; 367 pno_request->band_rssi_pref.rssi = request->rssi_adjust.delta; 368 } 369 #else 370 static inline void wlan_hdd_sched_scan_update_relative_rssi( 371 struct pno_scan_req_params *pno_request, 372 struct cfg80211_sched_scan_request *request) 373 { 374 } 375 #endif 376 377 #ifdef FEATURE_WLAN_SCAN_PNO 378 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)) 379 static uint32_t wlan_config_sched_scan_start_delay( 380 struct cfg80211_sched_scan_request *request) 381 { 382 return request->delay; 383 } 384 #else 385 static uint32_t wlan_config_sched_scan_start_delay( 386 struct cfg80211_sched_scan_request *request) 387 { 388 return 0; 389 } 390 #endif /*(LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)) */ 391 #endif /* FEATURE_WLAN_SCAN_PNO */ 392 393 int wlan_cfg80211_sched_scan_start(struct wlan_objmgr_vdev *vdev, 394 struct cfg80211_sched_scan_request *request, 395 uint8_t scan_backoff_multiplier) 396 { 397 struct pno_scan_req_params *req; 398 int i, j, ret = 0; 399 QDF_STATUS status; 400 uint8_t num_chan = 0; 401 uint16_t chan_freq; 402 struct wlan_objmgr_pdev *pdev = wlan_vdev_get_pdev(vdev); 403 struct wlan_objmgr_psoc *psoc; 404 uint32_t valid_ch[SCAN_PNO_MAX_NETW_CHANNELS_EX] = {0}; 405 bool enable_dfs_pno_chnl_scan; 406 407 if (ucfg_scan_get_pno_in_progress(vdev)) { 408 osif_debug("pno is already in progress"); 409 return -EBUSY; 410 } 411 412 if (ucfg_scan_get_pdev_status(pdev) != 413 SCAN_NOT_IN_PROGRESS) { 414 status = wlan_abort_scan(pdev, 415 wlan_objmgr_pdev_get_pdev_id(pdev), 416 INVAL_VDEV_ID, INVAL_SCAN_ID, true); 417 if (QDF_IS_STATUS_ERROR(status)) { 418 osif_err("aborting the existing scan is unsuccessful"); 419 return -EBUSY; 420 } 421 } 422 423 req = qdf_mem_malloc(sizeof(*req)); 424 if (!req) 425 return -ENOMEM; 426 427 wlan_pdev_obj_lock(pdev); 428 psoc = wlan_pdev_get_psoc(pdev); 429 wlan_pdev_obj_unlock(pdev); 430 431 req->networks_cnt = request->n_match_sets; 432 req->vdev_id = wlan_vdev_get_id(vdev); 433 434 if ((!req->networks_cnt) || 435 (req->networks_cnt > SCAN_PNO_MAX_SUPP_NETWORKS)) { 436 osif_err("Network input is not correct %d", 437 req->networks_cnt); 438 ret = -EINVAL; 439 goto error; 440 } 441 442 if (request->n_channels > SCAN_PNO_MAX_NETW_CHANNELS_EX) { 443 osif_err("Incorrect number of channels %d", 444 request->n_channels); 445 ret = -EINVAL; 446 goto error; 447 } 448 449 enable_dfs_pno_chnl_scan = ucfg_scan_is_dfs_chnl_scan_enabled(psoc); 450 if (request->n_channels) { 451 char *chl = qdf_mem_malloc((request->n_channels * 5) + 1); 452 int len = 0; 453 bool ap_or_go_present = wlan_cfg80211_is_ap_go_present(psoc); 454 455 if (!chl) { 456 ret = -ENOMEM; 457 goto error; 458 } 459 for (i = 0; i < request->n_channels; i++) { 460 chan_freq = request->channels[i]->center_freq; 461 if ((!enable_dfs_pno_chnl_scan) && 462 (wlan_reg_is_dfs_for_freq(pdev, chan_freq))) { 463 osif_debug("Dropping DFS channel freq :%d", 464 chan_freq); 465 continue; 466 } 467 if (wlan_reg_is_dsrc_freq(chan_freq)) 468 continue; 469 470 if (ap_or_go_present) { 471 bool ok; 472 473 status = 474 wlan_cfg80211_is_chan_ok_for_dnbs(psoc, 475 chan_freq, 476 &ok); 477 if (QDF_IS_STATUS_ERROR(status)) { 478 osif_err("DNBS check failed"); 479 qdf_mem_free(chl); 480 chl = NULL; 481 ret = -EINVAL; 482 goto error; 483 } 484 if (!ok) 485 continue; 486 } 487 len += snprintf(chl + len, 5, "%d ", chan_freq); 488 valid_ch[num_chan++] = chan_freq; 489 } 490 osif_notice("No. of Scan Channels: %d", num_chan); 491 osif_notice("Channel-List: %s", chl); 492 qdf_mem_free(chl); 493 chl = NULL; 494 /* If all channels are DFS and dropped, 495 * then ignore the PNO request 496 */ 497 if (!num_chan) { 498 osif_notice("Channel list empty due to filtering of DSRC"); 499 ret = -EINVAL; 500 goto error; 501 } 502 } 503 504 /* Filling per profile params */ 505 for (i = 0; i < req->networks_cnt; i++) { 506 req->networks_list[i].ssid.length = 507 request->match_sets[i].ssid.ssid_len; 508 509 if ((!req->networks_list[i].ssid.length) || 510 (req->networks_list[i].ssid.length > WLAN_SSID_MAX_LEN)) { 511 osif_err(" SSID Len %d is not correct for network %d", 512 req->networks_list[i].ssid.length, i); 513 ret = -EINVAL; 514 goto error; 515 } 516 517 qdf_mem_copy(req->networks_list[i].ssid.ssid, 518 request->match_sets[i].ssid.ssid, 519 req->networks_list[i].ssid.length); 520 req->networks_list[i].authentication = 0; /*eAUTH_TYPE_ANY */ 521 req->networks_list[i].encryption = 0; /*eED_ANY */ 522 req->networks_list[i].bc_new_type = 0; /*eBCAST_UNKNOWN */ 523 524 osif_notice("Received ssid:%.*s", 525 req->networks_list[i].ssid.length, 526 req->networks_list[i].ssid.ssid); 527 528 /*Copying list of valid channel into request */ 529 qdf_mem_copy(req->networks_list[i].channels, valid_ch, 530 num_chan * sizeof(uint32_t)); 531 req->networks_list[i].channel_cnt = num_chan; 532 req->networks_list[i].rssi_thresh = 533 request->match_sets[i].rssi_thold; 534 } 535 536 /* set scan to passive if no SSIDs are specified in the request */ 537 if (0 == request->n_ssids) 538 req->do_passive_scan = true; 539 else 540 req->do_passive_scan = false; 541 542 for (i = 0; i < request->n_ssids; i++) { 543 j = 0; 544 while (j < req->networks_cnt) { 545 if ((req->networks_list[j].ssid.length == 546 request->ssids[i].ssid_len) && 547 (!qdf_mem_cmp(req->networks_list[j].ssid.ssid, 548 request->ssids[i].ssid, 549 req->networks_list[j].ssid.length))) { 550 req->networks_list[j].bc_new_type = 551 SSID_BC_TYPE_HIDDEN; 552 break; 553 } 554 j++; 555 } 556 } 557 osif_notice("Number of hidden networks being Configured = %d", 558 request->n_ssids); 559 560 /* 561 * Before Kernel 4.4 562 * Driver gets only one time interval which is hard coded in 563 * supplicant for 10000ms. 564 * 565 * After Kernel 4.4 566 * User can configure multiple scan_plans, each scan would have 567 * separate scan cycle and interval. (interval is in unit of second.) 568 * For our use case, we would only have supplicant set one scan_plan, 569 * and firmware also support only one as well, so pick up the first 570 * index. 571 * 572 * Taking power consumption into account 573 * firmware after gPNOScanTimerRepeatValue times fast_scan_period 574 * switches slow_scan_period. This is less frequent scans and firmware 575 * shall be in slow_scan_period mode until next PNO Start. 576 */ 577 wlan_config_sched_scan_plan(req, request); 578 req->delay_start_time = wlan_config_sched_scan_start_delay(request); 579 req->scan_backoff_multiplier = scan_backoff_multiplier; 580 osif_notice("Base scan interval: %d sec, scan cycles: %d, slow scan interval %d", 581 req->fast_scan_period, req->fast_scan_max_cycles, 582 req->slow_scan_period); 583 wlan_hdd_sched_scan_update_relative_rssi(req, request); 584 585 psoc = wlan_pdev_get_psoc(pdev); 586 ucfg_scan_register_pno_cb(psoc, 587 wlan_cfg80211_pno_callback, NULL); 588 ucfg_scan_get_pno_def_params(vdev, req); 589 590 if (req->scan_random.randomize) 591 wlan_pno_scan_rand_attr(vdev, request, req); 592 593 if (ucfg_ie_whitelist_enabled(psoc, vdev)) 594 ucfg_copy_ie_whitelist_attrs(psoc, &req->ie_whitelist); 595 status = ucfg_scan_pno_start(vdev, req); 596 if (QDF_IS_STATUS_ERROR(status)) { 597 osif_err("Failed to enable PNO"); 598 ret = -EINVAL; 599 goto error; 600 } 601 602 osif_info("PNO scan request offloaded"); 603 604 error: 605 qdf_mem_free(req); 606 return ret; 607 } 608 609 int wlan_cfg80211_sched_scan_stop(struct wlan_objmgr_vdev *vdev) 610 { 611 QDF_STATUS status; 612 613 status = ucfg_scan_pno_stop(vdev); 614 if (QDF_IS_STATUS_ERROR(status)) 615 osif_err("Failed to disabled PNO"); 616 else 617 osif_info("PNO scan disabled"); 618 619 return 0; 620 } 621 #endif /*FEATURE_WLAN_SCAN_PNO */ 622 623 /** 624 * wlan_copy_bssid_scan_request() - API to copy the bssid to Scan request 625 * @scan_req: Pointer to scan_start_request 626 * @request: scan request from Supplicant 627 * 628 * This API copies the BSSID in scan request from Supplicant and copies it to 629 * the scan_start_request 630 * 631 * Return: None 632 */ 633 #if defined(CFG80211_SCAN_BSSID) || \ 634 (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)) 635 static inline void 636 wlan_copy_bssid_scan_request(struct scan_start_request *scan_req, 637 struct cfg80211_scan_request *request) 638 { 639 qdf_mem_copy(scan_req->scan_req.bssid_list[0].bytes, 640 request->bssid, QDF_MAC_ADDR_SIZE); 641 } 642 #else 643 static inline void 644 wlan_copy_bssid_scan_request(struct scan_start_request *scan_req, 645 struct cfg80211_scan_request *request) 646 { 647 648 } 649 #endif 650 651 /** 652 * wlan_scan_request_enqueue() - enqueue Scan Request 653 * @pdev: pointer to pdev object 654 * @req: Pointer to the scan request 655 * @source: source of the scan request 656 * @scan_id: scan identifier 657 * 658 * Enqueue scan request in the global scan list.This list 659 * stores the active scan request information. 660 * 661 * Return: 0 on success, error number otherwise 662 */ 663 static int wlan_scan_request_enqueue(struct wlan_objmgr_pdev *pdev, 664 struct cfg80211_scan_request *req, 665 uint8_t source, uint32_t scan_id) 666 { 667 struct scan_req *scan_req; 668 QDF_STATUS status; 669 struct pdev_osif_priv *osif_ctx; 670 struct osif_scan_pdev *osif_scan; 671 672 scan_req = qdf_mem_malloc(sizeof(*scan_req)); 673 if (!scan_req) 674 return -ENOMEM; 675 676 /* Get NL global context from objmgr*/ 677 osif_ctx = wlan_pdev_get_ospriv(pdev); 678 osif_scan = osif_ctx->osif_scan; 679 scan_req->scan_request = req; 680 scan_req->source = source; 681 scan_req->scan_id = scan_id; 682 scan_req->dev = req->wdev->netdev; 683 684 qdf_mutex_acquire(&osif_scan->scan_req_q_lock); 685 if (qdf_list_size(&osif_scan->scan_req_q) < WLAN_MAX_SCAN_COUNT) 686 status = qdf_list_insert_back(&osif_scan->scan_req_q, 687 &scan_req->node); 688 else 689 status = QDF_STATUS_E_RESOURCES; 690 qdf_mutex_release(&osif_scan->scan_req_q_lock); 691 if (QDF_IS_STATUS_ERROR(status)) { 692 osif_rl_debug("Failed to enqueue Scan Req as max scan %d already queued", 693 qdf_list_size(&osif_scan->scan_req_q)); 694 qdf_mem_free(scan_req); 695 return -EINVAL; 696 } 697 698 return 0; 699 } 700 701 /** 702 * wlan_scan_request_dequeue() - dequeue scan request 703 * @nl_ctx: Global HDD context 704 * @scan_id: scan id 705 * @req: scan request 706 * @dev: net device 707 * @source : returns source of the scan request 708 * 709 * Return: QDF_STATUS 710 */ 711 static QDF_STATUS wlan_scan_request_dequeue( 712 struct wlan_objmgr_pdev *pdev, 713 uint32_t scan_id, struct cfg80211_scan_request **req, 714 uint8_t *source, struct net_device **dev) 715 { 716 QDF_STATUS status = QDF_STATUS_E_FAILURE; 717 struct scan_req *scan_req; 718 qdf_list_node_t *node = NULL, *next_node = NULL; 719 struct pdev_osif_priv *osif_ctx; 720 struct osif_scan_pdev *scan_priv; 721 722 osif_debug("Dequeue Scan id: %d", scan_id); 723 724 if ((!source) || (!req)) { 725 osif_err("source or request is NULL"); 726 return QDF_STATUS_E_NULL_VALUE; 727 } 728 729 /* Get NL global context from objmgr*/ 730 osif_ctx = wlan_pdev_get_ospriv(pdev); 731 if (!osif_ctx) { 732 osif_err("Failed to retrieve osif context"); 733 return status; 734 } 735 scan_priv = osif_ctx->osif_scan; 736 737 if (qdf_list_empty(&scan_priv->scan_req_q)) { 738 osif_info("Scan List is empty"); 739 return QDF_STATUS_E_FAILURE; 740 } 741 742 qdf_mutex_acquire(&scan_priv->scan_req_q_lock); 743 if (QDF_STATUS_SUCCESS != 744 qdf_list_peek_front(&scan_priv->scan_req_q, &next_node)) { 745 qdf_mutex_release(&scan_priv->scan_req_q_lock); 746 osif_err("Failed to remove Scan Req from queue"); 747 return QDF_STATUS_E_FAILURE; 748 } 749 750 do { 751 node = next_node; 752 scan_req = qdf_container_of(node, struct scan_req, node); 753 if (scan_req->scan_id == scan_id) { 754 status = qdf_list_remove_node(&scan_priv->scan_req_q, 755 node); 756 if (status == QDF_STATUS_SUCCESS) { 757 *req = scan_req->scan_request; 758 *source = scan_req->source; 759 *dev = scan_req->dev; 760 qdf_mem_free(scan_req); 761 qdf_mutex_release(&scan_priv->scan_req_q_lock); 762 osif_debug("removed Scan id: %d, req = %pK, pending scans %d", 763 scan_id, req, 764 qdf_list_size(&scan_priv->scan_req_q)); 765 return QDF_STATUS_SUCCESS; 766 } else { 767 qdf_mutex_release(&scan_priv->scan_req_q_lock); 768 osif_err("Failed to remove node scan id %d, pending scans %d", 769 scan_id, 770 qdf_list_size(&scan_priv->scan_req_q)); 771 return status; 772 } 773 } 774 } while (QDF_STATUS_SUCCESS == 775 qdf_list_peek_next(&scan_priv->scan_req_q, node, &next_node)); 776 qdf_mutex_release(&scan_priv->scan_req_q_lock); 777 osif_err("Failed to find scan id %d", scan_id); 778 779 return status; 780 } 781 782 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)) 783 /** 784 * wlan_cfg80211_scan_done() - Scan completed callback to cfg80211 785 * @netdev: Net device 786 * @req : Scan request 787 * @aborted : true scan aborted false scan success 788 * 789 * This function notifies scan done to cfg80211 790 * 791 * Return: none 792 */ 793 static void wlan_cfg80211_scan_done(struct net_device *netdev, 794 struct cfg80211_scan_request *req, 795 bool aborted) 796 { 797 struct cfg80211_scan_info info = { 798 .aborted = aborted 799 }; 800 801 if (netdev->flags & IFF_UP) 802 cfg80211_scan_done(req, &info); 803 } 804 #elif (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 14, 0)) 805 /** 806 * wlan_cfg80211_scan_done() - Scan completed callback to cfg80211 807 * @netdev: Net device 808 * @req : Scan request 809 * @aborted : true scan aborted false scan success 810 * 811 * This function notifies scan done to cfg80211 812 * 813 * Return: none 814 */ 815 static void wlan_cfg80211_scan_done(struct net_device *netdev, 816 struct cfg80211_scan_request *req, 817 bool aborted) 818 { 819 if (netdev->flags & IFF_UP) 820 cfg80211_scan_done(req, aborted); 821 } 822 #endif 823 824 /** 825 * wlan_vendor_scan_callback() - Scan completed callback event 826 * 827 * @req : Scan request 828 * @aborted : true scan aborted false scan success 829 * 830 * This function sends scan completed callback event to NL. 831 * 832 * Return: none 833 */ 834 static void wlan_vendor_scan_callback(struct cfg80211_scan_request *req, 835 bool aborted) 836 { 837 struct sk_buff *skb; 838 struct nlattr *attr; 839 int i; 840 uint8_t scan_status; 841 uint64_t cookie; 842 843 skb = cfg80211_vendor_event_alloc(req->wdev->wiphy, req->wdev, 844 SCAN_DONE_EVENT_BUF_SIZE + 4 + NLMSG_HDRLEN, 845 QCA_NL80211_VENDOR_SUBCMD_SCAN_DONE_INDEX, 846 GFP_ATOMIC); 847 848 if (!skb) { 849 osif_err("skb alloc failed"); 850 qdf_mem_free(req); 851 return; 852 } 853 854 cookie = (uintptr_t)req; 855 856 attr = nla_nest_start(skb, QCA_WLAN_VENDOR_ATTR_SCAN_SSIDS); 857 if (!attr) 858 goto nla_put_failure; 859 for (i = 0; i < req->n_ssids; i++) { 860 if (nla_put(skb, i, req->ssids[i].ssid_len, req->ssids[i].ssid)) 861 goto nla_put_failure; 862 } 863 nla_nest_end(skb, attr); 864 865 attr = nla_nest_start(skb, QCA_WLAN_VENDOR_ATTR_SCAN_FREQUENCIES); 866 if (!attr) 867 goto nla_put_failure; 868 for (i = 0; i < req->n_channels; i++) { 869 if (nla_put_u32(skb, i, req->channels[i]->center_freq)) 870 goto nla_put_failure; 871 } 872 nla_nest_end(skb, attr); 873 874 if (req->ie && 875 nla_put(skb, QCA_WLAN_VENDOR_ATTR_SCAN_IE, req->ie_len, 876 req->ie)) 877 goto nla_put_failure; 878 879 if (req->flags && 880 nla_put_u32(skb, QCA_WLAN_VENDOR_ATTR_SCAN_FLAGS, req->flags)) 881 goto nla_put_failure; 882 883 if (wlan_cfg80211_nla_put_u64(skb, QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE, 884 cookie)) 885 goto nla_put_failure; 886 887 scan_status = (aborted == true) ? VENDOR_SCAN_STATUS_ABORTED : 888 VENDOR_SCAN_STATUS_NEW_RESULTS; 889 if (nla_put_u8(skb, QCA_WLAN_VENDOR_ATTR_SCAN_STATUS, scan_status)) 890 goto nla_put_failure; 891 892 cfg80211_vendor_event(skb, GFP_ATOMIC); 893 qdf_mem_free(req); 894 895 return; 896 897 nla_put_failure: 898 kfree_skb(skb); 899 qdf_mem_free(req); 900 } 901 902 /** 903 * wlan_scan_acquire_wake_lock_timeout() - acquire scan wake lock 904 * @psoc: psoc ptr 905 * @scan_wake_lock: Scan wake lock 906 * @timeout: timeout in ms 907 * 908 * Return: void 909 */ 910 static inline 911 void wlan_scan_acquire_wake_lock_timeout(struct wlan_objmgr_psoc *psoc, 912 qdf_wake_lock_t *scan_wake_lock, 913 uint32_t timeout) 914 { 915 if (!psoc || !scan_wake_lock) 916 return; 917 918 if (ucfg_scan_wake_lock_in_user_scan(psoc)) 919 qdf_wake_lock_timeout_acquire(scan_wake_lock, timeout); 920 } 921 922 923 /** 924 * wlan_scan_release_wake_lock() - release scan wake lock 925 * @psoc: psoc ptr 926 * @scan_wake_lock: Scan wake lock 927 * 928 * Return: void 929 */ 930 #ifdef FEATURE_WLAN_DIAG_SUPPORT 931 static inline 932 void wlan_scan_release_wake_lock(struct wlan_objmgr_psoc *psoc, 933 qdf_wake_lock_t *scan_wake_lock) 934 { 935 if (!psoc || !scan_wake_lock) 936 return; 937 938 if (ucfg_scan_wake_lock_in_user_scan(psoc)) 939 qdf_wake_lock_release(scan_wake_lock, 940 WIFI_POWER_EVENT_WAKELOCK_SCAN); 941 } 942 #else 943 static inline 944 void wlan_scan_release_wake_lock(struct wlan_objmgr_psoc *psoc, 945 qdf_wake_lock_t *scan_wake_lock) 946 { 947 if (!psoc || !scan_wake_lock) 948 return; 949 950 if (ucfg_scan_wake_lock_in_user_scan(psoc)) 951 qdf_wake_lock_release(scan_wake_lock, 0); 952 } 953 #endif 954 955 /** 956 * wlan_cfg80211_scan_done_callback() - scan done callback function called after 957 * scan is finished 958 * @vdev: vdev ptr 959 * @event: Scan event 960 * @args: Scan cb arg 961 * 962 * Return: void 963 */ 964 static void wlan_cfg80211_scan_done_callback( 965 struct wlan_objmgr_vdev *vdev, 966 struct scan_event *event, 967 void *args) 968 { 969 struct cfg80211_scan_request *req = NULL; 970 bool success = false; 971 uint32_t scan_id = event->scan_id; 972 uint8_t source = NL_SCAN; 973 struct wlan_objmgr_pdev *pdev; 974 struct pdev_osif_priv *osif_priv; 975 struct net_device *netdev = NULL; 976 QDF_STATUS status; 977 978 qdf_mtrace(QDF_MODULE_ID_SCAN, QDF_MODULE_ID_OS_IF, event->type, 979 event->vdev_id, event->scan_id); 980 981 if (!util_is_scan_completed(event, &success)) 982 return; 983 984 osif_debug("scan ID = %d vdev id = %d, event type %s(%d) reason = %s(%d)", 985 scan_id, event->vdev_id, 986 util_scan_get_ev_type_name(event->type), event->type, 987 util_scan_get_ev_reason_name(event->reason), 988 event->reason); 989 990 pdev = wlan_vdev_get_pdev(vdev); 991 status = wlan_scan_request_dequeue( 992 pdev, scan_id, &req, &source, &netdev); 993 if (QDF_IS_STATUS_ERROR(status)) { 994 osif_err("Dequeue of scan request failed ID: %d", scan_id); 995 goto allow_suspend; 996 } 997 998 if (!netdev) { 999 osif_err("net dev is NULL,Drop scan event Id: %d", scan_id); 1000 goto allow_suspend; 1001 } 1002 1003 /* Make sure vdev is active */ 1004 status = wlan_objmgr_vdev_try_get_ref(vdev, WLAN_OSIF_ID); 1005 if (QDF_IS_STATUS_ERROR(status)) { 1006 osif_err("Failed to get vdev reference: scan Id: %d", scan_id); 1007 goto allow_suspend; 1008 } 1009 1010 /* 1011 * Scan can be triggred from NL or vendor scan 1012 * - If scan is triggered from NL then cfg80211 scan done should be 1013 * called to updated scan completion to NL. 1014 * - If scan is triggred through vendor command then 1015 * scan done event will be posted 1016 */ 1017 if (NL_SCAN == source) 1018 wlan_cfg80211_scan_done(netdev, req, !success); 1019 else 1020 wlan_vendor_scan_callback(req, !success); 1021 1022 wlan_objmgr_vdev_release_ref(vdev, WLAN_OSIF_ID); 1023 allow_suspend: 1024 osif_priv = wlan_pdev_get_ospriv(pdev); 1025 if (qdf_list_empty(&osif_priv->osif_scan->scan_req_q)) { 1026 struct wlan_objmgr_psoc *psoc; 1027 1028 qdf_runtime_pm_allow_suspend( 1029 &osif_priv->osif_scan->runtime_pm_lock); 1030 1031 psoc = wlan_pdev_get_psoc(pdev); 1032 wlan_scan_release_wake_lock(psoc, 1033 &osif_priv->osif_scan->scan_wake_lock); 1034 /* 1035 * Acquire wakelock to handle the case where APP's tries 1036 * to suspend immediately after the driver gets connect 1037 * request(i.e after scan) from supplicant, this result in 1038 * app's is suspending and not able to process the connect 1039 * request to AP 1040 */ 1041 wlan_scan_acquire_wake_lock_timeout(psoc, 1042 &osif_priv->osif_scan->scan_wake_lock, 1043 SCAN_WAKE_LOCK_CONNECT_DURATION); 1044 } 1045 } 1046 1047 QDF_STATUS wlan_scan_runtime_pm_init(struct wlan_objmgr_pdev *pdev) 1048 { 1049 struct pdev_osif_priv *osif_priv; 1050 struct osif_scan_pdev *scan_priv; 1051 1052 wlan_pdev_obj_lock(pdev); 1053 osif_priv = wlan_pdev_get_ospriv(pdev); 1054 wlan_pdev_obj_unlock(pdev); 1055 1056 scan_priv = osif_priv->osif_scan; 1057 1058 return qdf_runtime_lock_init(&scan_priv->runtime_pm_lock); 1059 } 1060 1061 void wlan_scan_runtime_pm_deinit(struct wlan_objmgr_pdev *pdev) 1062 { 1063 struct pdev_osif_priv *osif_priv; 1064 struct osif_scan_pdev *scan_priv; 1065 1066 wlan_pdev_obj_lock(pdev); 1067 osif_priv = wlan_pdev_get_ospriv(pdev); 1068 wlan_pdev_obj_unlock(pdev); 1069 1070 scan_priv = osif_priv->osif_scan; 1071 qdf_runtime_lock_deinit(&scan_priv->runtime_pm_lock); 1072 } 1073 1074 QDF_STATUS wlan_cfg80211_scan_priv_init(struct wlan_objmgr_pdev *pdev) 1075 { 1076 struct pdev_osif_priv *osif_priv; 1077 struct osif_scan_pdev *scan_priv; 1078 struct wlan_objmgr_psoc *psoc; 1079 wlan_scan_requester req_id; 1080 1081 psoc = wlan_pdev_get_psoc(pdev); 1082 1083 req_id = ucfg_scan_register_requester(psoc, "CFG", 1084 wlan_cfg80211_scan_done_callback, NULL); 1085 1086 osif_priv = wlan_pdev_get_ospriv(pdev); 1087 scan_priv = qdf_mem_malloc(sizeof(*scan_priv)); 1088 if (!scan_priv) 1089 return QDF_STATUS_E_NOMEM; 1090 1091 /* Initialize the scan request queue */ 1092 osif_priv->osif_scan = scan_priv; 1093 scan_priv->req_id = req_id; 1094 qdf_list_create(&scan_priv->scan_req_q, WLAN_MAX_SCAN_COUNT); 1095 qdf_mutex_create(&scan_priv->scan_req_q_lock); 1096 qdf_wake_lock_create(&scan_priv->scan_wake_lock, "scan_wake_lock"); 1097 1098 return QDF_STATUS_SUCCESS; 1099 } 1100 1101 QDF_STATUS wlan_cfg80211_scan_priv_deinit(struct wlan_objmgr_pdev *pdev) 1102 { 1103 struct pdev_osif_priv *osif_priv; 1104 struct osif_scan_pdev *scan_priv; 1105 struct wlan_objmgr_psoc *psoc; 1106 1107 psoc = wlan_pdev_get_psoc(pdev); 1108 osif_priv = wlan_pdev_get_ospriv(pdev); 1109 1110 wlan_cfg80211_cleanup_scan_queue(pdev, NULL); 1111 scan_priv = osif_priv->osif_scan; 1112 qdf_wake_lock_destroy(&scan_priv->scan_wake_lock); 1113 qdf_mutex_destroy(&scan_priv->scan_req_q_lock); 1114 qdf_list_destroy(&scan_priv->scan_req_q); 1115 ucfg_scan_unregister_requester(psoc, scan_priv->req_id); 1116 osif_priv->osif_scan = NULL; 1117 qdf_mem_free(scan_priv); 1118 1119 return QDF_STATUS_SUCCESS; 1120 } 1121 1122 /** 1123 * wlan_cfg80211_enqueue_for_cleanup() - Function to populate scan cleanup queue 1124 * @scan_cleanup_q: Scan cleanup queue to be populated 1125 * @scan_priv: Pointer to scan related data used by cfg80211 scan 1126 * @dev: Netdevice pointer 1127 * 1128 * The function synchrounously iterates through the global scan queue to 1129 * identify entries that have to be cleaned up, copies identified entries 1130 * to another queue(to send scan complete event to NL later) and removes the 1131 * entry from the global scan queue. 1132 * 1133 * Return: None 1134 */ 1135 static void 1136 wlan_cfg80211_enqueue_for_cleanup(qdf_list_t *scan_cleanup_q, 1137 struct osif_scan_pdev *scan_priv, 1138 struct net_device *dev) 1139 { 1140 struct scan_req *scan_req, *scan_cleanup; 1141 qdf_list_node_t *node = NULL, *next_node = NULL; 1142 1143 qdf_mutex_acquire(&scan_priv->scan_req_q_lock); 1144 if (QDF_STATUS_SUCCESS != 1145 qdf_list_peek_front(&scan_priv->scan_req_q, 1146 &node)) { 1147 qdf_mutex_release(&scan_priv->scan_req_q_lock); 1148 return; 1149 } 1150 1151 while (node) { 1152 /* 1153 * Keep track of the next node, to traverse through the list 1154 * in the event of the current node being deleted. 1155 */ 1156 qdf_list_peek_next(&scan_priv->scan_req_q, 1157 node, &next_node); 1158 scan_req = qdf_container_of(node, struct scan_req, node); 1159 if (!dev || (dev == scan_req->dev)) { 1160 scan_cleanup = qdf_mem_malloc(sizeof(struct scan_req)); 1161 if (!scan_cleanup) { 1162 qdf_mutex_release(&scan_priv->scan_req_q_lock); 1163 return; 1164 } 1165 scan_cleanup->scan_request = scan_req->scan_request; 1166 scan_cleanup->scan_id = scan_req->scan_id; 1167 scan_cleanup->source = scan_req->source; 1168 scan_cleanup->dev = scan_req->dev; 1169 qdf_list_insert_back(scan_cleanup_q, 1170 &scan_cleanup->node); 1171 if (QDF_STATUS_SUCCESS != 1172 qdf_list_remove_node(&scan_priv->scan_req_q, 1173 node)) { 1174 qdf_mutex_release(&scan_priv->scan_req_q_lock); 1175 osif_err("Failed to remove scan request"); 1176 return; 1177 } 1178 qdf_mem_free(scan_req); 1179 } 1180 node = next_node; 1181 next_node = NULL; 1182 } 1183 qdf_mutex_release(&scan_priv->scan_req_q_lock); 1184 } 1185 1186 void wlan_cfg80211_cleanup_scan_queue(struct wlan_objmgr_pdev *pdev, 1187 struct net_device *dev) 1188 { 1189 struct scan_req *scan_req; 1190 struct cfg80211_scan_request *req; 1191 uint8_t source; 1192 bool aborted = true; 1193 struct pdev_osif_priv *osif_priv; 1194 qdf_list_t scan_cleanup_q; 1195 qdf_list_node_t *node = NULL; 1196 1197 if (!pdev) { 1198 osif_err("pdev is Null"); 1199 return; 1200 } 1201 1202 osif_priv = wlan_pdev_get_ospriv(pdev); 1203 1204 /* 1205 * To avoid any race conditions, create a local list to copy all the 1206 * scan entries to be removed and then send scan complete for each of 1207 * the identified entries to NL. 1208 */ 1209 qdf_list_create(&scan_cleanup_q, WLAN_MAX_SCAN_COUNT); 1210 wlan_cfg80211_enqueue_for_cleanup(&scan_cleanup_q, 1211 osif_priv->osif_scan, dev); 1212 1213 while (!qdf_list_empty(&scan_cleanup_q)) { 1214 if (QDF_STATUS_SUCCESS != qdf_list_remove_front(&scan_cleanup_q, 1215 &node)) { 1216 osif_err("Failed to remove scan request"); 1217 return; 1218 } 1219 scan_req = container_of(node, struct scan_req, node); 1220 req = scan_req->scan_request; 1221 source = scan_req->source; 1222 if (NL_SCAN == source) 1223 wlan_cfg80211_scan_done(scan_req->dev, req, 1224 aborted); 1225 else 1226 wlan_vendor_scan_callback(req, aborted); 1227 1228 qdf_mem_free(scan_req); 1229 } 1230 qdf_list_destroy(&scan_cleanup_q); 1231 1232 return; 1233 } 1234 1235 /** 1236 * wlan_cfg80211_update_scan_policy_type_flags() - Set scan flags according to 1237 * scan request 1238 * @scan_req: Pointer to csr scan req 1239 * 1240 * Return: None 1241 */ 1242 #if defined(CFG80211_SCAN_DBS_CONTROL_SUPPORT) || \ 1243 (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) 1244 static void wlan_cfg80211_update_scan_policy_type_flags( 1245 struct cfg80211_scan_request *req, 1246 struct scan_req_params *scan_req) 1247 { 1248 if (req->flags & NL80211_SCAN_FLAG_HIGH_ACCURACY) 1249 scan_req->scan_policy_high_accuracy = true; 1250 if (req->flags & NL80211_SCAN_FLAG_LOW_SPAN) 1251 scan_req->scan_policy_low_span = true; 1252 if (req->flags & NL80211_SCAN_FLAG_LOW_POWER) 1253 scan_req->scan_policy_low_power = true; 1254 } 1255 #else 1256 static inline void wlan_cfg80211_update_scan_policy_type_flags( 1257 struct cfg80211_scan_request *req, 1258 struct scan_req_params *scan_req) 1259 { 1260 } 1261 #endif 1262 1263 #ifdef WLAN_POLICY_MGR_ENABLE 1264 static bool 1265 wlan_cfg80211_allow_simultaneous_scan(struct wlan_objmgr_psoc *psoc) 1266 { 1267 return policy_mgr_is_scan_simultaneous_capable(psoc); 1268 } 1269 #else 1270 static bool 1271 wlan_cfg80211_allow_simultaneous_scan(struct wlan_objmgr_psoc *psoc) 1272 { 1273 return true; 1274 } 1275 #endif 1276 1277 int wlan_cfg80211_scan(struct wlan_objmgr_vdev *vdev, 1278 struct cfg80211_scan_request *request, 1279 struct scan_params *params) 1280 { 1281 struct scan_start_request *req; 1282 struct wlan_ssid *pssid; 1283 uint8_t i; 1284 int ret = 0; 1285 uint8_t num_chan = 0; 1286 uint32_t c_freq; 1287 struct wlan_objmgr_pdev *pdev = wlan_vdev_get_pdev(vdev); 1288 wlan_scan_requester req_id; 1289 struct pdev_osif_priv *osif_priv; 1290 struct wlan_objmgr_psoc *psoc; 1291 wlan_scan_id scan_id; 1292 bool is_p2p_scan = false; 1293 enum wlan_band band; 1294 struct net_device *netdev = NULL; 1295 QDF_STATUS qdf_status; 1296 uint32_t extra_ie_len = 0; 1297 1298 psoc = wlan_pdev_get_psoc(pdev); 1299 if (!psoc) { 1300 osif_err("Invalid psoc object"); 1301 return -EINVAL; 1302 } 1303 1304 /* Get NL global context from objmgr*/ 1305 osif_priv = wlan_pdev_get_ospriv(pdev); 1306 if (!osif_priv) { 1307 osif_err("Invalid osif priv object"); 1308 return -EINVAL; 1309 } 1310 1311 /* 1312 * For a non-SAP vdevs, if a scan is already going on i.e the scan queue 1313 * is not empty, and the simultaneous scan is disabled, dont allow 2nd 1314 * scan. 1315 */ 1316 if (!wlan_cfg80211_allow_simultaneous_scan(psoc) && 1317 !qdf_list_empty(&osif_priv->osif_scan->scan_req_q) && 1318 wlan_vdev_mlme_get_opmode(vdev) != QDF_SAP_MODE) { 1319 osif_err("Simultaneous scan disabled, reject scan"); 1320 return -EBUSY; 1321 } 1322 1323 req = qdf_mem_malloc(sizeof(*req)); 1324 if (!req) 1325 return -EINVAL; 1326 1327 /* Initialize the scan global params */ 1328 ucfg_scan_init_default_params(vdev, req); 1329 1330 req_id = osif_priv->osif_scan->req_id; 1331 scan_id = ucfg_scan_get_scan_id(psoc); 1332 if (!scan_id) { 1333 osif_err("Invalid scan id"); 1334 qdf_mem_free(req); 1335 return -EINVAL; 1336 } 1337 1338 /* fill the scan request structure */ 1339 req->vdev = vdev; 1340 req->scan_req.vdev_id = wlan_vdev_get_id(vdev); 1341 req->scan_req.scan_id = scan_id; 1342 req->scan_req.scan_req_id = req_id; 1343 1344 /* Enqueue the scan request */ 1345 ret = wlan_scan_request_enqueue(pdev, request, params->source, 1346 req->scan_req.scan_id); 1347 if (ret) { 1348 qdf_mem_free(req); 1349 return ret; 1350 } 1351 1352 /* Update scan policy type flags according to cfg scan request */ 1353 wlan_cfg80211_update_scan_policy_type_flags(request, 1354 &req->scan_req); 1355 /* 1356 * Even though supplicant doesn't provide any SSIDs, n_ssids is 1357 * set to 1. Because of this, driver is assuming that this is not 1358 * wildcard scan and so is not aging out the scan results. 1359 */ 1360 if ((request->ssids) && (request->n_ssids == 1) && 1361 ('\0' == request->ssids->ssid[0])) { 1362 request->n_ssids = 0; 1363 } 1364 1365 if ((request->ssids) && (0 < request->n_ssids)) { 1366 int j; 1367 req->scan_req.num_ssids = request->n_ssids; 1368 1369 if (req->scan_req.num_ssids > WLAN_SCAN_MAX_NUM_SSID) { 1370 osif_info("number of ssid received %d is greater than MAX %d so copy only MAX nuber of SSIDs", 1371 req->scan_req.num_ssids, 1372 WLAN_SCAN_MAX_NUM_SSID); 1373 req->scan_req.num_ssids = WLAN_SCAN_MAX_NUM_SSID; 1374 } 1375 /* copy all the ssid's and their length */ 1376 for (j = 0; j < req->scan_req.num_ssids; j++) { 1377 pssid = &req->scan_req.ssid[j]; 1378 /* get the ssid length */ 1379 pssid->length = request->ssids[j].ssid_len; 1380 if (pssid->length > WLAN_SSID_MAX_LEN) 1381 pssid->length = WLAN_SSID_MAX_LEN; 1382 qdf_mem_copy(pssid->ssid, 1383 &request->ssids[j].ssid[0], 1384 pssid->length); 1385 osif_info("SSID number %d: %.*s", j, pssid->length, 1386 pssid->ssid); 1387 } 1388 } 1389 if (request->ssids || 1390 (wlan_vdev_mlme_get_opmode(vdev) == QDF_P2P_GO_MODE)) 1391 req->scan_req.scan_f_passive = false; 1392 1393 if (params->half_rate) 1394 req->scan_req.scan_f_half_rate = true; 1395 else if (params->quarter_rate) 1396 req->scan_req.scan_f_quarter_rate = true; 1397 1398 if (params->strict_pscan) 1399 req->scan_req.scan_f_strict_passive_pch = true; 1400 1401 if ((request->n_ssids == 1) && request->ssids && 1402 !qdf_mem_cmp(&request->ssids[0], "DIRECT-", 7)) 1403 is_p2p_scan = true; 1404 1405 if (is_p2p_scan && request->no_cck) 1406 req->scan_req.scan_type = SCAN_TYPE_P2P_SEARCH; 1407 1408 /* Set dwell time mode according to scan policy type flags */ 1409 if (ucfg_scan_cfg_honour_nl_scan_policy_flags(psoc)) { 1410 if (req->scan_req.scan_policy_high_accuracy) 1411 req->scan_req.adaptive_dwell_time_mode = 1412 SCAN_DWELL_MODE_STATIC; 1413 if (req->scan_req.scan_policy_low_power || 1414 req->scan_req.scan_policy_low_span) 1415 req->scan_req.adaptive_dwell_time_mode = 1416 SCAN_DWELL_MODE_AGGRESSIVE; 1417 } 1418 1419 /* 1420 * FW require at least 1 MAC to send probe request. 1421 * If MAC is all 0 set it to BC addr as this is the address on 1422 * which fw will send probe req. 1423 */ 1424 req->scan_req.num_bssid = 1; 1425 wlan_copy_bssid_scan_request(req, request); 1426 if (qdf_is_macaddr_zero(&req->scan_req.bssid_list[0])) 1427 qdf_set_macaddr_broadcast(&req->scan_req.bssid_list[0]); 1428 1429 if (request->n_channels) { 1430 uint32_t buff_len = (request->n_channels * 5) + 1; 1431 char *chl = qdf_mem_malloc(buff_len); 1432 int len = 0; 1433 #ifdef WLAN_POLICY_MGR_ENABLE 1434 bool ap_or_go_present = 1435 policy_mgr_mode_specific_connection_count( 1436 psoc, PM_SAP_MODE, NULL) || 1437 policy_mgr_mode_specific_connection_count( 1438 psoc, PM_P2P_GO_MODE, NULL); 1439 #endif 1440 if (!chl) { 1441 ret = -ENOMEM; 1442 goto err; 1443 } 1444 for (i = 0; i < request->n_channels; i++) { 1445 c_freq = request->channels[i]->center_freq; 1446 if (wlan_reg_is_dsrc_freq(c_freq)) 1447 continue; 1448 #ifdef WLAN_POLICY_MGR_ENABLE 1449 if (ap_or_go_present) { 1450 bool ok; 1451 1452 qdf_status = policy_mgr_is_chan_ok_for_dnbs( 1453 psoc, c_freq, &ok); 1454 1455 if (QDF_IS_STATUS_ERROR(qdf_status)) { 1456 osif_err("DNBS check failed"); 1457 qdf_mem_free(chl); 1458 chl = NULL; 1459 ret = -EINVAL; 1460 goto err; 1461 } 1462 if (!ok) 1463 continue; 1464 } 1465 #endif 1466 len += snprintf(chl + len, buff_len - len, "%d ", 1467 c_freq); 1468 req->scan_req.chan_list.chan[num_chan].freq = c_freq; 1469 band = util_scan_scm_freq_to_band(c_freq); 1470 if (band == WLAN_BAND_2_4_GHZ) 1471 req->scan_req.chan_list.chan[num_chan].phymode = 1472 SCAN_PHY_MODE_11G; 1473 else 1474 req->scan_req.chan_list.chan[num_chan].phymode = 1475 SCAN_PHY_MODE_11A; 1476 num_chan++; 1477 if (num_chan >= NUM_CHANNELS) 1478 break; 1479 } 1480 osif_info("Channel-List: %s", chl); 1481 qdf_mem_free(chl); 1482 chl = NULL; 1483 osif_info("No. of Scan Channels: %d", num_chan); 1484 } 1485 if (!num_chan) { 1486 osif_err("Received zero non-dsrc channels"); 1487 ret = -EINVAL; 1488 goto err; 1489 } 1490 req->scan_req.chan_list.num_chan = num_chan; 1491 1492 /* P2P increase the scan priority */ 1493 if (is_p2p_scan) 1494 req->scan_req.scan_priority = SCAN_PRIORITY_HIGH; 1495 1496 if (params->priority != SCAN_PRIORITY_COUNT) 1497 req->scan_req.scan_priority = params->priority; 1498 1499 if (request->ie_len) 1500 extra_ie_len = request->ie_len; 1501 else if (params->default_ie.ptr && params->default_ie.len) 1502 extra_ie_len = params->default_ie.len; 1503 1504 if (params->vendor_ie.ptr && params->vendor_ie.len) 1505 extra_ie_len += params->vendor_ie.len; 1506 1507 if (extra_ie_len) { 1508 req->scan_req.extraie.ptr = qdf_mem_malloc(extra_ie_len); 1509 if (!req->scan_req.extraie.ptr) { 1510 ret = -ENOMEM; 1511 goto err; 1512 } 1513 } 1514 1515 if (request->ie_len) { 1516 req->scan_req.extraie.len = request->ie_len; 1517 qdf_mem_copy(req->scan_req.extraie.ptr, request->ie, 1518 request->ie_len); 1519 } else if (params->default_ie.ptr && params->default_ie.len) { 1520 req->scan_req.extraie.len = params->default_ie.len; 1521 qdf_mem_copy(req->scan_req.extraie.ptr, params->default_ie.ptr, 1522 params->default_ie.len); 1523 } 1524 1525 if (params->vendor_ie.ptr && params->vendor_ie.len) { 1526 qdf_mem_copy((req->scan_req.extraie.ptr + 1527 req->scan_req.extraie.len), 1528 params->vendor_ie.ptr, params->vendor_ie.len); 1529 1530 req->scan_req.extraie.len += params->vendor_ie.len; 1531 } 1532 1533 if (!is_p2p_scan) { 1534 if (req->scan_req.scan_random.randomize) 1535 wlan_scan_rand_attrs(vdev, request, req); 1536 if (ucfg_ie_whitelist_enabled(psoc, vdev) && 1537 ucfg_copy_ie_whitelist_attrs(psoc, 1538 &req->scan_req.ie_whitelist)) 1539 req->scan_req.scan_f_en_ie_whitelist_in_probe = true; 1540 } 1541 1542 if (request->flags & NL80211_SCAN_FLAG_FLUSH) 1543 ucfg_scan_flush_results(pdev, NULL); 1544 1545 /* 1546 * Acquire wakelock to handle the case where APP's send scan to connect. 1547 * If suspend is received during scan scan will be aborted and APP will 1548 * not get scan result and not connect. eg if PNO is implemented in 1549 * framework. 1550 */ 1551 wlan_scan_acquire_wake_lock_timeout(psoc, 1552 &osif_priv->osif_scan->scan_wake_lock, 1553 SCAN_WAKE_LOCK_SCAN_DURATION); 1554 1555 qdf_runtime_pm_prevent_suspend( 1556 &osif_priv->osif_scan->runtime_pm_lock); 1557 1558 qdf_status = ucfg_scan_start(req); 1559 if (QDF_IS_STATUS_ERROR(qdf_status)) { 1560 osif_err("ucfg_scan_start returned error %d", qdf_status); 1561 if (qdf_status == QDF_STATUS_E_RESOURCES) 1562 osif_err("HO is in progress.So defer the scan by informing busy"); 1563 wlan_scan_request_dequeue(pdev, scan_id, &request, 1564 ¶ms->source, &netdev); 1565 if (qdf_list_empty(&osif_priv->osif_scan->scan_req_q)) { 1566 qdf_runtime_pm_allow_suspend( 1567 &osif_priv->osif_scan->runtime_pm_lock); 1568 wlan_scan_release_wake_lock(psoc, 1569 &osif_priv->osif_scan->scan_wake_lock); 1570 } 1571 } 1572 1573 return qdf_status_to_os_return(qdf_status); 1574 1575 err: 1576 qdf_mem_free(req); 1577 wlan_scan_request_dequeue(pdev, scan_id, &request, 1578 ¶ms->source, &netdev); 1579 return ret; 1580 } 1581 1582 /** 1583 * wlan_get_scanid() - API to get the scan id 1584 * from the scan cookie attribute. 1585 * @pdev: Pointer to pdev object 1586 * @scan_id: Pointer to scan id 1587 * @cookie : Scan cookie attribute 1588 * 1589 * API to get the scan id from the scan cookie attribute 1590 * sent from supplicant by matching scan request. 1591 * 1592 * Return: 0 for success, non zero for failure 1593 */ 1594 static int wlan_get_scanid(struct wlan_objmgr_pdev *pdev, 1595 uint32_t *scan_id, uint64_t cookie) 1596 { 1597 struct scan_req *scan_req; 1598 qdf_list_node_t *node = NULL; 1599 qdf_list_node_t *ptr_node = NULL; 1600 int ret = -EINVAL; 1601 struct pdev_osif_priv *osif_ctx; 1602 struct osif_scan_pdev *scan_priv; 1603 1604 /* Get NL global context from objmgr*/ 1605 osif_ctx = wlan_pdev_get_ospriv(pdev); 1606 if (!osif_ctx) { 1607 osif_err("Failed to retrieve osif context"); 1608 return ret; 1609 } 1610 scan_priv = osif_ctx->osif_scan; 1611 qdf_mutex_acquire(&scan_priv->scan_req_q_lock); 1612 if (qdf_list_empty(&scan_priv->scan_req_q)) { 1613 qdf_mutex_release(&scan_priv->scan_req_q_lock); 1614 osif_err("Failed to retrieve scan id"); 1615 return ret; 1616 } 1617 1618 if (QDF_STATUS_SUCCESS != 1619 qdf_list_peek_front(&scan_priv->scan_req_q, 1620 &ptr_node)) { 1621 qdf_mutex_release(&scan_priv->scan_req_q_lock); 1622 return ret; 1623 } 1624 1625 do { 1626 node = ptr_node; 1627 scan_req = qdf_container_of(node, struct scan_req, node); 1628 if (cookie == 1629 (uintptr_t)(scan_req->scan_request)) { 1630 *scan_id = scan_req->scan_id; 1631 ret = 0; 1632 break; 1633 } 1634 } while (QDF_STATUS_SUCCESS == 1635 qdf_list_peek_next(&scan_priv->scan_req_q, 1636 node, &ptr_node)); 1637 1638 qdf_mutex_release(&scan_priv->scan_req_q_lock); 1639 1640 return ret; 1641 } 1642 1643 QDF_STATUS wlan_abort_scan(struct wlan_objmgr_pdev *pdev, 1644 uint32_t pdev_id, uint32_t vdev_id, 1645 wlan_scan_id scan_id, bool sync) 1646 { 1647 struct scan_cancel_request *req; 1648 struct pdev_osif_priv *osif_ctx; 1649 struct osif_scan_pdev *scan_priv; 1650 QDF_STATUS status; 1651 struct wlan_objmgr_vdev *vdev; 1652 1653 req = qdf_mem_malloc(sizeof(*req)); 1654 if (!req) 1655 return QDF_STATUS_E_NOMEM; 1656 1657 /* Get NL global context from objmgr*/ 1658 osif_ctx = wlan_pdev_get_ospriv(pdev); 1659 if (!osif_ctx) { 1660 osif_err("Failed to retrieve osif context"); 1661 qdf_mem_free(req); 1662 return QDF_STATUS_E_FAILURE; 1663 } 1664 if (vdev_id == INVAL_VDEV_ID) 1665 vdev = wlan_objmgr_pdev_get_first_vdev(pdev, WLAN_OSIF_ID); 1666 else 1667 vdev = wlan_objmgr_get_vdev_by_id_from_pdev(pdev, 1668 vdev_id, WLAN_OSIF_ID); 1669 1670 if (!vdev) { 1671 osif_err("Failed get vdev"); 1672 qdf_mem_free(req); 1673 return QDF_STATUS_E_INVAL; 1674 } 1675 scan_priv = osif_ctx->osif_scan; 1676 req->cancel_req.requester = scan_priv->req_id; 1677 req->vdev = vdev; 1678 req->cancel_req.scan_id = scan_id; 1679 req->cancel_req.pdev_id = pdev_id; 1680 req->cancel_req.vdev_id = vdev_id; 1681 if (scan_id != INVAL_SCAN_ID) 1682 req->cancel_req.req_type = WLAN_SCAN_CANCEL_SINGLE; 1683 else if (vdev_id == INVAL_VDEV_ID) 1684 req->cancel_req.req_type = WLAN_SCAN_CANCEL_PDEV_ALL; 1685 else 1686 req->cancel_req.req_type = WLAN_SCAN_CANCEL_VDEV_ALL; 1687 1688 if (sync) 1689 status = ucfg_scan_cancel_sync(req); 1690 else 1691 status = ucfg_scan_cancel(req); 1692 if (QDF_IS_STATUS_ERROR(status)) 1693 osif_err("Cancel scan request failed"); 1694 1695 wlan_objmgr_vdev_release_ref(vdev, WLAN_OSIF_ID); 1696 1697 return status; 1698 } 1699 1700 qdf_export_symbol(wlan_abort_scan); 1701 1702 int wlan_cfg80211_abort_scan(struct wlan_objmgr_pdev *pdev) 1703 { 1704 uint8_t pdev_id; 1705 1706 pdev_id = wlan_objmgr_pdev_get_pdev_id(pdev); 1707 1708 if (ucfg_scan_get_pdev_status(pdev) != 1709 SCAN_NOT_IN_PROGRESS) 1710 wlan_abort_scan(pdev, pdev_id, 1711 INVAL_VDEV_ID, INVAL_SCAN_ID, true); 1712 1713 return 0; 1714 } 1715 1716 int wlan_vendor_abort_scan(struct wlan_objmgr_pdev *pdev, 1717 const void *data, int data_len) 1718 { 1719 struct nlattr *tb[QCA_WLAN_VENDOR_ATTR_SCAN_MAX + 1]; 1720 int ret = -EINVAL; 1721 wlan_scan_id scan_id; 1722 uint64_t cookie; 1723 uint8_t pdev_id; 1724 1725 pdev_id = wlan_objmgr_pdev_get_pdev_id(pdev); 1726 if (wlan_cfg80211_nla_parse(tb, QCA_WLAN_VENDOR_ATTR_SCAN_MAX, data, 1727 data_len, scan_policy)) { 1728 osif_err("Invalid ATTR"); 1729 return ret; 1730 } 1731 1732 if (tb[QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE]) { 1733 cookie = nla_get_u64( 1734 tb[QCA_WLAN_VENDOR_ATTR_SCAN_COOKIE]); 1735 ret = wlan_get_scanid(pdev, &scan_id, cookie); 1736 if (ret != 0) 1737 return ret; 1738 if (ucfg_scan_get_pdev_status(pdev) != 1739 SCAN_NOT_IN_PROGRESS) 1740 wlan_abort_scan(pdev, INVAL_PDEV_ID, 1741 INVAL_VDEV_ID, scan_id, true); 1742 } 1743 return 0; 1744 } 1745 1746 static inline struct ieee80211_channel * 1747 wlan_get_ieee80211_channel(struct wiphy *wiphy, 1748 struct wlan_objmgr_pdev *pdev, 1749 int chan_freq) 1750 { 1751 struct ieee80211_channel *chan; 1752 1753 chan = ieee80211_get_channel(wiphy, chan_freq); 1754 if (!chan) 1755 osif_err("chan is NULL, freq: %d", chan_freq); 1756 1757 return chan; 1758 } 1759 1760 #ifdef WLAN_ENABLE_AGEIE_ON_SCAN_RESULTS 1761 static inline int wlan_get_frame_len(struct scan_cache_entry *scan_params) 1762 { 1763 return util_scan_entry_frame_len(scan_params) + sizeof(qcom_ie_age); 1764 } 1765 1766 static inline void wlan_add_age_ie(uint8_t *mgmt_frame, 1767 struct scan_cache_entry *scan_params) 1768 { 1769 qcom_ie_age *qie_age = NULL; 1770 1771 /* GPS Requirement: need age ie per entry. Using vendor specific. */ 1772 /* Assuming this is the last IE, copy at the end */ 1773 qie_age = (qcom_ie_age *) (mgmt_frame + 1774 util_scan_entry_frame_len(scan_params)); 1775 qie_age->element_id = QCOM_VENDOR_IE_ID; 1776 qie_age->len = QCOM_VENDOR_IE_AGE_LEN; 1777 qie_age->oui_1 = QCOM_OUI1; 1778 qie_age->oui_2 = QCOM_OUI2; 1779 qie_age->oui_3 = QCOM_OUI3; 1780 qie_age->type = QCOM_VENDOR_IE_AGE_TYPE; 1781 /* 1782 * Lowi expects the timestamp of bss in units of 1/10 ms. In driver 1783 * all bss related timestamp is in units of ms. Due to this when scan 1784 * results are sent to lowi the scan age is high.To address this, 1785 * send age in units of 1/10 ms. 1786 */ 1787 qie_age->age = 1788 (uint32_t)(qdf_mc_timer_get_system_time() - 1789 scan_params->scan_entry_time)/10; 1790 qie_age->tsf_delta = scan_params->tsf_delta; 1791 memcpy(&qie_age->beacon_tsf, scan_params->tsf_info.data, 1792 sizeof(qie_age->beacon_tsf)); 1793 memcpy(&qie_age->seq_ctrl, &scan_params->seq_num, 1794 sizeof(qie_age->seq_ctrl)); 1795 } 1796 #else 1797 static inline int wlan_get_frame_len(struct scan_cache_entry *scan_params) 1798 { 1799 return util_scan_entry_frame_len(scan_params); 1800 } 1801 1802 static inline void wlan_add_age_ie(uint8_t *mgmt_frame, 1803 struct scan_cache_entry *scan_params) 1804 { 1805 } 1806 #endif /* WLAN_ENABLE_AGEIE_ON_SCAN_RESULTS */ 1807 1808 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 0)) || \ 1809 defined(CFG80211_INFORM_BSS_FRAME_DATA) 1810 /** 1811 * wlan_fill_per_chain_rssi() - fill per chain RSSI in inform bss 1812 * @data: bss data 1813 * @per_chain_snr: per chain RSSI 1814 * 1815 * Return: void 1816 */ 1817 #if defined(CFG80211_SCAN_PER_CHAIN_RSSI_SUPPORT) || \ 1818 (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 16, 0)) 1819 static void wlan_fill_per_chain_rssi(struct cfg80211_inform_bss *data, 1820 struct wlan_cfg80211_inform_bss *bss) 1821 { 1822 1823 uint32_t i; 1824 1825 if (!bss || !data) { 1826 osif_err("Received bss is NULL"); 1827 return; 1828 } 1829 for (i = 0; i < WLAN_MGMT_TXRX_HOST_MAX_ANTENNA; i++) { 1830 if (!bss->per_chain_rssi[i] || 1831 (bss->per_chain_rssi[i] == WLAN_INVALID_PER_CHAIN_RSSI)) 1832 continue; 1833 data->chain_signal[i] = bss->per_chain_rssi[i]; 1834 data->chains |= BIT(i); 1835 } 1836 } 1837 #else 1838 static inline void 1839 wlan_fill_per_chain_rssi(struct cfg80211_inform_bss *data, 1840 struct wlan_cfg80211_inform_bss *bss) 1841 { 1842 } 1843 #endif 1844 1845 struct cfg80211_bss * 1846 wlan_cfg80211_inform_bss_frame_data(struct wiphy *wiphy, 1847 struct wlan_cfg80211_inform_bss *bss) 1848 { 1849 struct cfg80211_inform_bss data = {0}; 1850 1851 if (!bss) { 1852 osif_err("bss is null"); 1853 return NULL; 1854 } 1855 wlan_fill_per_chain_rssi(&data, bss); 1856 1857 data.chan = bss->chan; 1858 data.boottime_ns = bss->boottime_ns; 1859 data.signal = bss->rssi; 1860 return cfg80211_inform_bss_frame_data(wiphy, &data, bss->mgmt, 1861 bss->frame_len, GFP_ATOMIC); 1862 } 1863 #else 1864 struct cfg80211_bss * 1865 wlan_cfg80211_inform_bss_frame_data(struct wiphy *wiphy, 1866 struct wlan_cfg80211_inform_bss *bss) 1867 1868 { 1869 return cfg80211_inform_bss_frame(wiphy, bss->chan, bss->mgmt, 1870 bss->frame_len, 1871 bss->rssi, GFP_ATOMIC); 1872 } 1873 #endif 1874 1875 #if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)) 1876 static inline void wlan_cfg80211_put_bss(struct wiphy *wiphy, 1877 struct cfg80211_bss *bss) 1878 { 1879 cfg80211_put_bss(wiphy, bss); 1880 } 1881 #else 1882 static inline void wlan_cfg80211_put_bss(struct wiphy *wiphy, 1883 struct cfg80211_bss *bss) 1884 { 1885 cfg80211_put_bss(bss); 1886 } 1887 #endif 1888 1889 void wlan_cfg80211_inform_bss_frame(struct wlan_objmgr_pdev *pdev, 1890 struct scan_cache_entry *scan_params) 1891 { 1892 struct pdev_osif_priv *pdev_ospriv = wlan_pdev_get_ospriv(pdev); 1893 struct wiphy *wiphy; 1894 struct cfg80211_bss *bss = NULL; 1895 struct wlan_cfg80211_inform_bss bss_data = {0}; 1896 1897 if (!pdev_ospriv) { 1898 osif_err("os_priv is NULL"); 1899 return; 1900 } 1901 1902 wiphy = pdev_ospriv->wiphy; 1903 1904 bss_data.frame_len = wlan_get_frame_len(scan_params); 1905 bss_data.mgmt = qdf_mem_malloc_atomic(bss_data.frame_len); 1906 if (!bss_data.mgmt) { 1907 osif_err("mem alloc failed for bss %pM seq %d", 1908 bss_data.mgmt->bssid, scan_params->seq_num); 1909 return; 1910 } 1911 qdf_mem_copy(bss_data.mgmt, 1912 util_scan_entry_frame_ptr(scan_params), 1913 util_scan_entry_frame_len(scan_params)); 1914 /* 1915 * Android does not want the timestamp from the frame. 1916 * Instead it wants a monotonic increasing value 1917 */ 1918 bss_data.mgmt->u.probe_resp.timestamp = qdf_get_monotonic_boottime(); 1919 wlan_add_age_ie((uint8_t *)bss_data.mgmt, scan_params); 1920 /* 1921 * Based on .ini configuration, raw rssi can be reported for bss. 1922 * Raw rssi is typically used for estimating power. 1923 */ 1924 bss_data.rssi = scan_params->rssi_raw; 1925 1926 bss_data.chan = wlan_get_ieee80211_channel(wiphy, pdev, 1927 scan_params->channel.chan_freq); 1928 if (!bss_data.chan) { 1929 osif_err("Channel not found for bss %pM seq %d chan_freq %d", 1930 bss_data.mgmt->bssid, scan_params->seq_num, 1931 scan_params->channel.chan_freq); 1932 qdf_mem_free(bss_data.mgmt); 1933 return; 1934 } 1935 1936 /* 1937 * Supplicant takes the signal strength in terms of 1938 * mBm (1 dBm = 100 mBm). 1939 */ 1940 bss_data.rssi = QDF_MIN(bss_data.rssi, 0) * 100; 1941 1942 bss_data.boottime_ns = scan_params->boottime_ns; 1943 1944 qdf_mem_copy(bss_data.per_chain_rssi, scan_params->per_chain_rssi, 1945 WLAN_MGMT_TXRX_HOST_MAX_ANTENNA); 1946 1947 bss = wlan_cfg80211_inform_bss_frame_data(wiphy, &bss_data); 1948 if (!bss) 1949 osif_err("failed to inform bss %pM seq %d", 1950 bss_data.mgmt->bssid, scan_params->seq_num); 1951 else 1952 wlan_cfg80211_put_bss(wiphy, bss); 1953 1954 qdf_mem_free(bss_data.mgmt); 1955 } 1956 1957 #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 1, 0)) && \ 1958 !defined(WITH_BACKPORTS) && !defined(IEEE80211_PRIVACY) 1959 struct cfg80211_bss *wlan_cfg80211_get_bss(struct wiphy *wiphy, 1960 struct ieee80211_channel *channel, 1961 const u8 *bssid, const u8 *ssid, 1962 size_t ssid_len) 1963 { 1964 return cfg80211_get_bss(wiphy, channel, bssid, 1965 ssid, ssid_len, 1966 WLAN_CAPABILITY_ESS, 1967 WLAN_CAPABILITY_ESS); 1968 } 1969 #else 1970 struct cfg80211_bss *wlan_cfg80211_get_bss(struct wiphy *wiphy, 1971 struct ieee80211_channel *channel, 1972 const u8 *bssid, const u8 *ssid, 1973 size_t ssid_len) 1974 { 1975 return cfg80211_get_bss(wiphy, channel, bssid, 1976 ssid, ssid_len, 1977 IEEE80211_BSS_TYPE_ESS, 1978 IEEE80211_PRIVACY_ANY); 1979 } 1980 #endif 1981 1982 void __wlan_cfg80211_unlink_bss_list(struct wiphy *wiphy, uint8_t *bssid, 1983 uint8_t *ssid, uint8_t ssid_len) 1984 { 1985 struct cfg80211_bss *bss = NULL; 1986 1987 bss = wlan_cfg80211_get_bss(wiphy, NULL, bssid, 1988 ssid, ssid_len); 1989 if (!bss) { 1990 osif_info("BSS %pM not found", bssid); 1991 } else { 1992 osif_debug("unlink entry for ssid:%.*s and BSSID %pM", 1993 ssid_len, ssid, bssid); 1994 cfg80211_unlink_bss(wiphy, bss); 1995 wlan_cfg80211_put_bss(wiphy, bss); 1996 } 1997 1998 /* 1999 * Kernel creates separate entries into it's bss list for probe resp 2000 * and beacon for hidden AP. Both have separate ref count and thus 2001 * deleting one will not delete other entry. 2002 * If beacon entry of the hidden AP is not deleted and AP switch to 2003 * broadcasting SSID from Hiding SSID, kernel will reject the beacon 2004 * entry. So unlink the hidden beacon entry (if present) as well from 2005 * kernel, to avoid such issue. 2006 */ 2007 bss = wlan_cfg80211_get_bss(wiphy, NULL, bssid, NULL, 0); 2008 if (!bss) { 2009 osif_debug("Hidden bss not found for Ssid:%.*s BSSID: %pM sid_len %d", 2010 ssid_len, ssid, bssid, ssid_len); 2011 } else { 2012 osif_debug("unlink entry for Hidden ssid:%.*s and BSSID %pM", 2013 ssid_len, ssid, bssid); 2014 2015 cfg80211_unlink_bss(wiphy, bss); 2016 /* cfg80211_get_bss get bss with ref count so release it */ 2017 wlan_cfg80211_put_bss(wiphy, bss); 2018 } 2019 } 2020 void wlan_cfg80211_unlink_bss_list(struct wlan_objmgr_pdev *pdev, 2021 struct scan_cache_entry *scan_entry) 2022 { 2023 struct pdev_osif_priv *pdev_ospriv = wlan_pdev_get_ospriv(pdev); 2024 struct wiphy *wiphy; 2025 2026 if (!pdev_ospriv) { 2027 osif_err("os_priv is NULL"); 2028 return; 2029 } 2030 2031 wiphy = pdev_ospriv->wiphy; 2032 2033 __wlan_cfg80211_unlink_bss_list(wiphy, scan_entry->bssid.bytes, 2034 scan_entry->ssid.ssid, 2035 scan_entry->ssid.length); 2036 } 2037 2038 #if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 12, 0)) 2039 /* 2040 * wlan_scan_wiphy_set_max_sched_scans() - set maximum number of scheduled scans 2041 * to wiphy. 2042 * @wiphy: pointer to wiphy 2043 * @max_scans: max num scans to be configured 2044 * 2045 */ 2046 static inline void 2047 wlan_scan_wiphy_set_max_sched_scans(struct wiphy *wiphy, uint8_t max_scans) 2048 { 2049 if (max_scans == 0) 2050 wiphy->flags &= ~WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 2051 else 2052 wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN; 2053 } 2054 #else 2055 static inline void 2056 wlan_scan_wiphy_set_max_sched_scans(struct wiphy *wiphy, uint8_t max_scans) 2057 { 2058 wiphy->max_sched_scan_reqs = max_scans; 2059 } 2060 #endif /* KERNEL_VERSION(4, 12, 0) */ 2061 2062 #if defined(CFG80211_REPORT_BETTER_BSS_IN_SCHED_SCAN) || \ 2063 (LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)) 2064 void wlan_scan_cfg80211_add_connected_pno_support(struct wiphy *wiphy) 2065 { 2066 wiphy_ext_feature_set(wiphy, 2067 NL80211_EXT_FEATURE_SCHED_SCAN_RELATIVE_RSSI); 2068 } 2069 #endif 2070 2071 #if ((LINUX_VERSION_CODE > KERNEL_VERSION(4, 4, 0)) || \ 2072 defined(CFG80211_MULTI_SCAN_PLAN_BACKPORT)) && \ 2073 defined(FEATURE_WLAN_SCAN_PNO) 2074 void wlan_config_sched_scan_plans_to_wiphy(struct wiphy *wiphy, 2075 struct wlan_objmgr_psoc *psoc) 2076 { 2077 if (ucfg_scan_get_pno_scan_support(psoc)) { 2078 wlan_scan_wiphy_set_max_sched_scans(wiphy, 1); 2079 wiphy->max_sched_scan_ssids = SCAN_PNO_MAX_SUPP_NETWORKS; 2080 wiphy->max_match_sets = SCAN_PNO_MAX_SUPP_NETWORKS; 2081 wiphy->max_sched_scan_ie_len = SCAN_MAX_IE_LENGTH; 2082 wiphy->max_sched_scan_plans = SCAN_PNO_MAX_PLAN_REQUEST; 2083 2084 wiphy->max_sched_scan_plan_interval = 2085 ucfg_scan_get_max_sched_scan_plan_interval(psoc); 2086 2087 wiphy->max_sched_scan_plan_iterations = 2088 ucfg_scan_get_max_sched_scan_plan_iterations(psoc); 2089 } 2090 } 2091 #endif 2092