1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2002-2005, Instant802 Networks, Inc. 4 * Copyright 2005-2006, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2013-2014 Intel Mobile Communications GmbH 7 * Copyright (C) 2017 Intel Deutschland GmbH 8 * Copyright (C) 2018-2023 Intel Corporation 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/fips.h> 14 #include <linux/init.h> 15 #include <linux/netdevice.h> 16 #include <linux/types.h> 17 #include <linux/slab.h> 18 #include <linux/skbuff.h> 19 #include <linux/etherdevice.h> 20 #include <linux/if_arp.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/bitmap.h> 23 #include <linux/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/dropreason.h> 26 #include <net/cfg80211.h> 27 #include <net/addrconf.h> 28 29 #include "ieee80211_i.h" 30 #include "driver-ops.h" 31 #include "rate.h" 32 #include "mesh.h" 33 #include "wep.h" 34 #include "led.h" 35 #include "debugfs.h" 36 37 void ieee80211_configure_filter(struct ieee80211_local *local) 38 { 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_allmultis)) 44 new_flags |= FIF_ALLMULTI; 45 46 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 47 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 48 new_flags |= FIF_BCN_PRBRESP_PROMISC; 49 50 if (local->fif_probe_req || local->probe_req_reg) 51 new_flags |= FIF_PROBE_REQ; 52 53 if (local->fif_fcsfail) 54 new_flags |= FIF_FCSFAIL; 55 56 if (local->fif_plcpfail) 57 new_flags |= FIF_PLCPFAIL; 58 59 if (local->fif_control) 60 new_flags |= FIF_CONTROL; 61 62 if (local->fif_other_bss) 63 new_flags |= FIF_OTHER_BSS; 64 65 if (local->fif_pspoll) 66 new_flags |= FIF_PSPOLL; 67 68 if (local->rx_mcast_action_reg) 69 new_flags |= FIF_MCAST_ACTION; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct work_struct *work) 88 { 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93 } 94 95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 96 { 97 struct ieee80211_sub_if_data *sdata; 98 struct cfg80211_chan_def chandef = {}; 99 u32 changed = 0; 100 int power; 101 u32 offchannel_flag; 102 103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 104 105 if (local->scan_chandef.chan) { 106 chandef = local->scan_chandef; 107 } else if (local->tmp_channel) { 108 chandef.chan = local->tmp_channel; 109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 110 chandef.center_freq1 = chandef.chan->center_freq; 111 chandef.freq1_offset = chandef.chan->freq_offset; 112 } else 113 chandef = local->_oper_chandef; 114 115 WARN(!cfg80211_chandef_valid(&chandef), 116 "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz", 117 chandef.chan->center_freq, chandef.chan->freq_offset, 118 chandef.width, chandef.center_freq1, chandef.freq1_offset, 119 chandef.center_freq2); 120 121 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 122 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 123 else 124 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 125 126 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 127 128 if (offchannel_flag || 129 !cfg80211_chandef_identical(&local->hw.conf.chandef, 130 &local->_oper_chandef)) { 131 local->hw.conf.chandef = chandef; 132 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 133 } 134 135 if (!conf_is_ht(&local->hw.conf)) { 136 /* 137 * mac80211.h documents that this is only valid 138 * when the channel is set to an HT type, and 139 * that otherwise STATIC is used. 140 */ 141 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 142 } else if (local->hw.conf.smps_mode != local->smps_mode) { 143 local->hw.conf.smps_mode = local->smps_mode; 144 changed |= IEEE80211_CONF_CHANGE_SMPS; 145 } 146 147 power = ieee80211_chandef_max_power(&chandef); 148 149 rcu_read_lock(); 150 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 151 if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) 152 continue; 153 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 154 continue; 155 if (sdata->vif.bss_conf.txpower == INT_MIN) 156 continue; 157 power = min(power, sdata->vif.bss_conf.txpower); 158 } 159 rcu_read_unlock(); 160 161 if (local->hw.conf.power_level != power) { 162 changed |= IEEE80211_CONF_CHANGE_POWER; 163 local->hw.conf.power_level = power; 164 } 165 166 return changed; 167 } 168 169 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 170 { 171 int ret = 0; 172 173 might_sleep(); 174 175 if (!local->use_chanctx) 176 changed |= ieee80211_hw_conf_chan(local); 177 else 178 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 179 IEEE80211_CONF_CHANGE_POWER | 180 IEEE80211_CONF_CHANGE_SMPS); 181 182 if (changed && local->open_count) { 183 ret = drv_config(local, changed); 184 /* 185 * Goal: 186 * HW reconfiguration should never fail, the driver has told 187 * us what it can support so it should live up to that promise. 188 * 189 * Current status: 190 * rfkill is not integrated with mac80211 and a 191 * configuration command can thus fail if hardware rfkill 192 * is enabled 193 * 194 * FIXME: integrate rfkill with mac80211 and then add this 195 * WARN_ON() back 196 * 197 */ 198 /* WARN_ON(ret); */ 199 } 200 201 return ret; 202 } 203 204 #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ 205 BSS_CHANGED_IDLE |\ 206 BSS_CHANGED_PS |\ 207 BSS_CHANGED_IBSS |\ 208 BSS_CHANGED_ARP_FILTER |\ 209 BSS_CHANGED_SSID) 210 211 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 212 u64 changed) 213 { 214 struct ieee80211_local *local = sdata->local; 215 216 might_sleep(); 217 218 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 219 return; 220 221 if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | 222 BSS_CHANGED_BEACON_ENABLED) && 223 sdata->vif.type != NL80211_IFTYPE_AP && 224 sdata->vif.type != NL80211_IFTYPE_ADHOC && 225 sdata->vif.type != NL80211_IFTYPE_MESH_POINT && 226 sdata->vif.type != NL80211_IFTYPE_OCB)) 227 return; 228 229 if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || 230 sdata->vif.type == NL80211_IFTYPE_NAN || 231 (sdata->vif.type == NL80211_IFTYPE_MONITOR && 232 !sdata->vif.bss_conf.mu_mimo_owner && 233 !(changed & BSS_CHANGED_TXPOWER)))) 234 return; 235 236 if (!check_sdata_in_driver(sdata)) 237 return; 238 239 if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { 240 u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; 241 242 trace_drv_vif_cfg_changed(local, sdata, changed); 243 if (local->ops->vif_cfg_changed) 244 local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); 245 } 246 247 if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { 248 u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; 249 250 /* FIXME: should be for each link */ 251 trace_drv_link_info_changed(local, sdata, &sdata->vif.bss_conf, 252 changed); 253 if (local->ops->link_info_changed) 254 local->ops->link_info_changed(&local->hw, &sdata->vif, 255 &sdata->vif.bss_conf, ch); 256 } 257 258 if (local->ops->bss_info_changed) 259 local->ops->bss_info_changed(&local->hw, &sdata->vif, 260 &sdata->vif.bss_conf, changed); 261 trace_drv_return_void(local); 262 } 263 264 void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, 265 u64 changed) 266 { 267 struct ieee80211_local *local = sdata->local; 268 269 WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); 270 271 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 272 return; 273 274 drv_vif_cfg_changed(local, sdata, changed); 275 } 276 277 void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, 278 struct ieee80211_link_data *link, 279 u64 changed) 280 { 281 struct ieee80211_local *local = sdata->local; 282 283 WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); 284 285 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 286 return; 287 288 if (!check_sdata_in_driver(sdata)) 289 return; 290 291 drv_link_info_changed(local, sdata, link->conf, link->link_id, changed); 292 } 293 294 u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 295 { 296 sdata->vif.bss_conf.use_cts_prot = false; 297 sdata->vif.bss_conf.use_short_preamble = false; 298 sdata->vif.bss_conf.use_short_slot = false; 299 return BSS_CHANGED_ERP_CTS_PROT | 300 BSS_CHANGED_ERP_PREAMBLE | 301 BSS_CHANGED_ERP_SLOT; 302 } 303 304 /* context: requires softirqs disabled */ 305 void ieee80211_handle_queued_frames(struct ieee80211_local *local) 306 { 307 struct sk_buff *skb; 308 309 while ((skb = skb_dequeue(&local->skb_queue)) || 310 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 311 switch (skb->pkt_type) { 312 case IEEE80211_RX_MSG: 313 /* Clear skb->pkt_type in order to not confuse kernel 314 * netstack. */ 315 skb->pkt_type = 0; 316 ieee80211_rx(&local->hw, skb); 317 break; 318 case IEEE80211_TX_STATUS_MSG: 319 skb->pkt_type = 0; 320 ieee80211_tx_status(&local->hw, skb); 321 break; 322 default: 323 WARN(1, "mac80211: Packet is of unknown type %d\n", 324 skb->pkt_type); 325 dev_kfree_skb(skb); 326 break; 327 } 328 } 329 } 330 331 static void ieee80211_tasklet_handler(struct tasklet_struct *t) 332 { 333 struct ieee80211_local *local = from_tasklet(local, t, tasklet); 334 335 ieee80211_handle_queued_frames(local); 336 } 337 338 static void ieee80211_restart_work(struct work_struct *work) 339 { 340 struct ieee80211_local *local = 341 container_of(work, struct ieee80211_local, restart_work); 342 struct ieee80211_sub_if_data *sdata; 343 int ret; 344 345 flush_workqueue(local->workqueue); 346 347 rtnl_lock(); 348 /* we might do interface manipulations, so need both */ 349 wiphy_lock(local->hw.wiphy); 350 351 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 352 "%s called with hardware scan in progress\n", __func__); 353 354 list_for_each_entry(sdata, &local->interfaces, list) { 355 /* 356 * XXX: there may be more work for other vif types and even 357 * for station mode: a good thing would be to run most of 358 * the iface type's dependent _stop (ieee80211_mg_stop, 359 * ieee80211_ibss_stop) etc... 360 * For now, fix only the specific bug that was seen: race 361 * between csa_connection_drop_work and us. 362 */ 363 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 364 /* 365 * This worker is scheduled from the iface worker that 366 * runs on mac80211's workqueue, so we can't be 367 * scheduling this worker after the cancel right here. 368 * The exception is ieee80211_chswitch_done. 369 * Then we can have a race... 370 */ 371 wiphy_work_cancel(local->hw.wiphy, 372 &sdata->u.mgd.csa_connection_drop_work); 373 if (sdata->vif.bss_conf.csa_active) { 374 sdata_lock(sdata); 375 ieee80211_sta_connection_lost(sdata, 376 WLAN_REASON_UNSPECIFIED, 377 false); 378 sdata_unlock(sdata); 379 } 380 } 381 flush_delayed_work(&sdata->dec_tailroom_needed_wk); 382 } 383 ieee80211_scan_cancel(local); 384 385 /* make sure any new ROC will consider local->in_reconfig */ 386 wiphy_delayed_work_flush(local->hw.wiphy, &local->roc_work); 387 wiphy_work_flush(local->hw.wiphy, &local->hw_roc_done); 388 389 /* wait for all packet processing to be done */ 390 synchronize_net(); 391 392 ret = ieee80211_reconfig(local); 393 wiphy_unlock(local->hw.wiphy); 394 395 if (ret) 396 cfg80211_shutdown_all_interfaces(local->hw.wiphy); 397 398 rtnl_unlock(); 399 } 400 401 void ieee80211_restart_hw(struct ieee80211_hw *hw) 402 { 403 struct ieee80211_local *local = hw_to_local(hw); 404 405 trace_api_restart_hw(local); 406 407 wiphy_info(hw->wiphy, 408 "Hardware restart was requested\n"); 409 410 /* use this reason, ieee80211_reconfig will unblock it */ 411 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 412 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 413 false); 414 415 /* 416 * Stop all Rx during the reconfig. We don't want state changes 417 * or driver callbacks while this is in progress. 418 */ 419 local->in_reconfig = true; 420 barrier(); 421 422 queue_work(system_freezable_wq, &local->restart_work); 423 } 424 EXPORT_SYMBOL(ieee80211_restart_hw); 425 426 #ifdef CONFIG_INET 427 static int ieee80211_ifa_changed(struct notifier_block *nb, 428 unsigned long data, void *arg) 429 { 430 struct in_ifaddr *ifa = arg; 431 struct ieee80211_local *local = 432 container_of(nb, struct ieee80211_local, 433 ifa_notifier); 434 struct net_device *ndev = ifa->ifa_dev->dev; 435 struct wireless_dev *wdev = ndev->ieee80211_ptr; 436 struct in_device *idev; 437 struct ieee80211_sub_if_data *sdata; 438 struct ieee80211_vif_cfg *vif_cfg; 439 struct ieee80211_if_managed *ifmgd; 440 int c = 0; 441 442 /* Make sure it's our interface that got changed */ 443 if (!wdev) 444 return NOTIFY_DONE; 445 446 if (wdev->wiphy != local->hw.wiphy) 447 return NOTIFY_DONE; 448 449 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 450 vif_cfg = &sdata->vif.cfg; 451 452 /* ARP filtering is only supported in managed mode */ 453 if (sdata->vif.type != NL80211_IFTYPE_STATION) 454 return NOTIFY_DONE; 455 456 idev = __in_dev_get_rtnl(sdata->dev); 457 if (!idev) 458 return NOTIFY_DONE; 459 460 ifmgd = &sdata->u.mgd; 461 sdata_lock(sdata); 462 463 /* Copy the addresses to the vif config list */ 464 ifa = rtnl_dereference(idev->ifa_list); 465 while (ifa) { 466 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 467 vif_cfg->arp_addr_list[c] = ifa->ifa_address; 468 ifa = rtnl_dereference(ifa->ifa_next); 469 c++; 470 } 471 472 vif_cfg->arp_addr_cnt = c; 473 474 /* Configure driver only if associated (which also implies it is up) */ 475 if (ifmgd->associated) 476 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_ARP_FILTER); 477 478 sdata_unlock(sdata); 479 480 return NOTIFY_OK; 481 } 482 #endif 483 484 #if IS_ENABLED(CONFIG_IPV6) 485 static int ieee80211_ifa6_changed(struct notifier_block *nb, 486 unsigned long data, void *arg) 487 { 488 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 489 struct inet6_dev *idev = ifa->idev; 490 struct net_device *ndev = ifa->idev->dev; 491 struct ieee80211_local *local = 492 container_of(nb, struct ieee80211_local, ifa6_notifier); 493 struct wireless_dev *wdev = ndev->ieee80211_ptr; 494 struct ieee80211_sub_if_data *sdata; 495 496 /* Make sure it's our interface that got changed */ 497 if (!wdev || wdev->wiphy != local->hw.wiphy) 498 return NOTIFY_DONE; 499 500 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 501 502 /* 503 * For now only support station mode. This is mostly because 504 * doing AP would have to handle AP_VLAN in some way ... 505 */ 506 if (sdata->vif.type != NL80211_IFTYPE_STATION) 507 return NOTIFY_DONE; 508 509 drv_ipv6_addr_change(local, sdata, idev); 510 511 return NOTIFY_OK; 512 } 513 #endif 514 515 /* There isn't a lot of sense in it, but you can transmit anything you like */ 516 static const struct ieee80211_txrx_stypes 517 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 518 [NL80211_IFTYPE_ADHOC] = { 519 .tx = 0xffff, 520 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 521 BIT(IEEE80211_STYPE_AUTH >> 4) | 522 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 523 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 524 }, 525 [NL80211_IFTYPE_STATION] = { 526 .tx = 0xffff, 527 /* 528 * To support Pre Association Security Negotiation (PASN) while 529 * already associated to one AP, allow user space to register to 530 * Rx authentication frames, so that the user space logic would 531 * be able to receive/handle authentication frames from a 532 * different AP as part of PASN. 533 * It is expected that user space would intelligently register 534 * for Rx authentication frames, i.e., only when PASN is used 535 * and configure a match filter only for PASN authentication 536 * algorithm, as otherwise the MLME functionality of mac80211 537 * would be broken. 538 */ 539 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 540 BIT(IEEE80211_STYPE_AUTH >> 4) | 541 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 542 }, 543 [NL80211_IFTYPE_AP] = { 544 .tx = 0xffff, 545 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 546 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 547 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 548 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 549 BIT(IEEE80211_STYPE_AUTH >> 4) | 550 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 551 BIT(IEEE80211_STYPE_ACTION >> 4), 552 }, 553 [NL80211_IFTYPE_AP_VLAN] = { 554 /* copy AP */ 555 .tx = 0xffff, 556 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 557 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 558 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 559 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 560 BIT(IEEE80211_STYPE_AUTH >> 4) | 561 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 562 BIT(IEEE80211_STYPE_ACTION >> 4), 563 }, 564 [NL80211_IFTYPE_P2P_CLIENT] = { 565 .tx = 0xffff, 566 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 567 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 568 }, 569 [NL80211_IFTYPE_P2P_GO] = { 570 .tx = 0xffff, 571 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 572 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 573 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 574 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 575 BIT(IEEE80211_STYPE_AUTH >> 4) | 576 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 577 BIT(IEEE80211_STYPE_ACTION >> 4), 578 }, 579 [NL80211_IFTYPE_MESH_POINT] = { 580 .tx = 0xffff, 581 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 582 BIT(IEEE80211_STYPE_AUTH >> 4) | 583 BIT(IEEE80211_STYPE_DEAUTH >> 4), 584 }, 585 [NL80211_IFTYPE_P2P_DEVICE] = { 586 .tx = 0xffff, 587 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 588 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 589 }, 590 }; 591 592 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 593 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 594 IEEE80211_HT_AMPDU_PARM_DENSITY, 595 596 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 597 IEEE80211_HT_CAP_MAX_AMSDU | 598 IEEE80211_HT_CAP_SGI_20 | 599 IEEE80211_HT_CAP_SGI_40 | 600 IEEE80211_HT_CAP_TX_STBC | 601 IEEE80211_HT_CAP_RX_STBC | 602 IEEE80211_HT_CAP_LDPC_CODING | 603 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 604 .mcs = { 605 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 606 0xff, 0xff, 0xff, 0xff, 0xff, }, 607 }, 608 }; 609 610 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 611 .vht_cap_info = 612 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 613 IEEE80211_VHT_CAP_SHORT_GI_80 | 614 IEEE80211_VHT_CAP_SHORT_GI_160 | 615 IEEE80211_VHT_CAP_RXSTBC_MASK | 616 IEEE80211_VHT_CAP_TXSTBC | 617 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 618 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 619 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 620 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 621 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 622 .supp_mcs = { 623 .rx_mcs_map = cpu_to_le16(~0), 624 .tx_mcs_map = cpu_to_le16(~0), 625 }, 626 }; 627 628 struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, 629 const struct ieee80211_ops *ops, 630 const char *requested_name) 631 { 632 struct ieee80211_local *local; 633 int priv_size, i; 634 struct wiphy *wiphy; 635 bool use_chanctx; 636 637 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 638 !ops->add_interface || !ops->remove_interface || 639 !ops->configure_filter || !ops->wake_tx_queue)) 640 return NULL; 641 642 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 643 return NULL; 644 645 if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || 646 (ops->link_info_changed && ops->bss_info_changed))) 647 return NULL; 648 649 /* check all or no channel context operations exist */ 650 i = !!ops->add_chanctx + !!ops->remove_chanctx + 651 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 652 !!ops->unassign_vif_chanctx; 653 if (WARN_ON(i != 0 && i != 5)) 654 return NULL; 655 use_chanctx = i == 5; 656 657 /* Ensure 32-byte alignment of our private data and hw private data. 658 * We use the wiphy priv data for both our ieee80211_local and for 659 * the driver's private data 660 * 661 * In memory it'll be like this: 662 * 663 * +-------------------------+ 664 * | struct wiphy | 665 * +-------------------------+ 666 * | struct ieee80211_local | 667 * +-------------------------+ 668 * | driver's private data | 669 * +-------------------------+ 670 * 671 */ 672 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 673 674 wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name); 675 676 if (!wiphy) 677 return NULL; 678 679 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 680 681 wiphy->privid = mac80211_wiphy_privid; 682 683 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 684 WIPHY_FLAG_4ADDR_AP | 685 WIPHY_FLAG_4ADDR_STATION | 686 WIPHY_FLAG_REPORTS_OBSS | 687 WIPHY_FLAG_OFFCHAN_TX; 688 689 if (!use_chanctx || ops->remain_on_channel) 690 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 691 692 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 693 NL80211_FEATURE_SAE | 694 NL80211_FEATURE_HT_IBSS | 695 NL80211_FEATURE_VIF_TXPOWER | 696 NL80211_FEATURE_MAC_ON_CREATE | 697 NL80211_FEATURE_USERSPACE_MPM | 698 NL80211_FEATURE_FULL_AP_CLIENT_STATE; 699 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_FILS_STA); 700 wiphy_ext_feature_set(wiphy, 701 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); 702 wiphy_ext_feature_set(wiphy, 703 NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); 704 wiphy_ext_feature_set(wiphy, 705 NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); 706 wiphy_ext_feature_set(wiphy, 707 NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); 708 wiphy_ext_feature_set(wiphy, 709 NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); 710 711 if (!ops->hw_scan) { 712 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 713 NL80211_FEATURE_AP_SCAN; 714 /* 715 * if the driver behaves correctly using the probe request 716 * (template) from mac80211, then both of these should be 717 * supported even with hw scan - but let drivers opt in. 718 */ 719 wiphy_ext_feature_set(wiphy, 720 NL80211_EXT_FEATURE_SCAN_RANDOM_SN); 721 wiphy_ext_feature_set(wiphy, 722 NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); 723 } 724 725 if (!ops->set_key) 726 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 727 728 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_TXQS); 729 wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_RRM); 730 731 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 732 733 local = wiphy_priv(wiphy); 734 735 if (sta_info_init(local)) 736 goto err_free; 737 738 local->hw.wiphy = wiphy; 739 740 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 741 742 local->ops = ops; 743 local->use_chanctx = use_chanctx; 744 745 /* 746 * We need a bit of data queued to build aggregates properly, so 747 * instruct the TCP stack to allow more than a single ms of data 748 * to be queued in the stack. The value is a bit-shift of 1 749 * second, so 7 is ~8ms of queued data. Only affects local TCP 750 * sockets. 751 * This is the default, anyhow - drivers may need to override it 752 * for local reasons (longer buffers, longer completion time, or 753 * similar). 754 */ 755 local->hw.tx_sk_pacing_shift = 7; 756 757 /* set up some defaults */ 758 local->hw.queues = 1; 759 local->hw.max_rates = 1; 760 local->hw.max_report_rates = 0; 761 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 762 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; 763 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 764 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 765 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 766 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 767 IEEE80211_RADIOTAP_MCS_HAVE_GI | 768 IEEE80211_RADIOTAP_MCS_HAVE_BW; 769 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 770 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 771 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 772 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 773 local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; 774 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 775 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 776 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 777 778 local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; 779 780 wiphy->extended_capabilities = local->ext_capa; 781 wiphy->extended_capabilities_mask = local->ext_capa; 782 wiphy->extended_capabilities_len = 783 ARRAY_SIZE(local->ext_capa); 784 785 INIT_LIST_HEAD(&local->interfaces); 786 INIT_LIST_HEAD(&local->mon_list); 787 788 __hw_addr_init(&local->mc_list); 789 790 mutex_init(&local->iflist_mtx); 791 mutex_init(&local->mtx); 792 793 mutex_init(&local->key_mtx); 794 spin_lock_init(&local->filter_lock); 795 spin_lock_init(&local->rx_path_lock); 796 spin_lock_init(&local->queue_stop_reason_lock); 797 798 for (i = 0; i < IEEE80211_NUM_ACS; i++) { 799 INIT_LIST_HEAD(&local->active_txqs[i]); 800 spin_lock_init(&local->active_txq_lock[i]); 801 local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; 802 local->aql_txq_limit_high[i] = 803 IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; 804 atomic_set(&local->aql_ac_pending_airtime[i], 0); 805 } 806 807 local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; 808 local->aql_threshold = IEEE80211_AQL_THRESHOLD; 809 atomic_set(&local->aql_total_pending_airtime, 0); 810 811 spin_lock_init(&local->handle_wake_tx_queue_lock); 812 813 INIT_LIST_HEAD(&local->chanctx_list); 814 mutex_init(&local->chanctx_mtx); 815 816 wiphy_delayed_work_init(&local->scan_work, ieee80211_scan_work); 817 818 INIT_WORK(&local->restart_work, ieee80211_restart_work); 819 820 wiphy_work_init(&local->radar_detected_work, 821 ieee80211_dfs_radar_detected_work); 822 823 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 824 local->smps_mode = IEEE80211_SMPS_OFF; 825 826 INIT_WORK(&local->dynamic_ps_enable_work, 827 ieee80211_dynamic_ps_enable_work); 828 INIT_WORK(&local->dynamic_ps_disable_work, 829 ieee80211_dynamic_ps_disable_work); 830 timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); 831 832 wiphy_work_init(&local->sched_scan_stopped_work, 833 ieee80211_sched_scan_stopped_work); 834 835 spin_lock_init(&local->ack_status_lock); 836 idr_init(&local->ack_status_frames); 837 838 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 839 skb_queue_head_init(&local->pending[i]); 840 atomic_set(&local->agg_queue_stop[i], 0); 841 } 842 tasklet_setup(&local->tx_pending_tasklet, ieee80211_tx_pending); 843 tasklet_setup(&local->wake_txqs_tasklet, ieee80211_wake_txqs); 844 tasklet_setup(&local->tasklet, ieee80211_tasklet_handler); 845 846 skb_queue_head_init(&local->skb_queue); 847 skb_queue_head_init(&local->skb_queue_unreliable); 848 849 ieee80211_alloc_led_names(local); 850 851 ieee80211_roc_setup(local); 852 853 local->hw.radiotap_timestamp.units_pos = -1; 854 local->hw.radiotap_timestamp.accuracy = -1; 855 856 return &local->hw; 857 err_free: 858 wiphy_free(wiphy); 859 return NULL; 860 } 861 EXPORT_SYMBOL(ieee80211_alloc_hw_nm); 862 863 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 864 { 865 bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ 866 bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); 867 int r = 0, w = 0; 868 u32 *suites; 869 static const u32 cipher_suites[] = { 870 /* keep WEP first, it may be removed below */ 871 WLAN_CIPHER_SUITE_WEP40, 872 WLAN_CIPHER_SUITE_WEP104, 873 WLAN_CIPHER_SUITE_TKIP, 874 WLAN_CIPHER_SUITE_CCMP, 875 WLAN_CIPHER_SUITE_CCMP_256, 876 WLAN_CIPHER_SUITE_GCMP, 877 WLAN_CIPHER_SUITE_GCMP_256, 878 879 /* keep last -- depends on hw flags! */ 880 WLAN_CIPHER_SUITE_AES_CMAC, 881 WLAN_CIPHER_SUITE_BIP_CMAC_256, 882 WLAN_CIPHER_SUITE_BIP_GMAC_128, 883 WLAN_CIPHER_SUITE_BIP_GMAC_256, 884 }; 885 886 if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || 887 local->hw.wiphy->cipher_suites) { 888 /* If the driver advertises, or doesn't support SW crypto, 889 * we only need to remove WEP if necessary. 890 */ 891 if (have_wep) 892 return 0; 893 894 /* well if it has _no_ ciphers ... fine */ 895 if (!local->hw.wiphy->n_cipher_suites) 896 return 0; 897 898 /* Driver provides cipher suites, but we need to exclude WEP */ 899 suites = kmemdup(local->hw.wiphy->cipher_suites, 900 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 901 GFP_KERNEL); 902 if (!suites) 903 return -ENOMEM; 904 905 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 906 u32 suite = local->hw.wiphy->cipher_suites[r]; 907 908 if (suite == WLAN_CIPHER_SUITE_WEP40 || 909 suite == WLAN_CIPHER_SUITE_WEP104) 910 continue; 911 suites[w++] = suite; 912 } 913 } else { 914 /* assign the (software supported and perhaps offloaded) 915 * cipher suites 916 */ 917 local->hw.wiphy->cipher_suites = cipher_suites; 918 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 919 920 if (!have_mfp) 921 local->hw.wiphy->n_cipher_suites -= 4; 922 923 if (!have_wep) { 924 local->hw.wiphy->cipher_suites += 2; 925 local->hw.wiphy->n_cipher_suites -= 2; 926 } 927 928 /* not dynamically allocated, so just return */ 929 return 0; 930 } 931 932 local->hw.wiphy->cipher_suites = suites; 933 local->hw.wiphy->n_cipher_suites = w; 934 local->wiphy_ciphers_allocated = true; 935 936 return 0; 937 } 938 939 int ieee80211_register_hw(struct ieee80211_hw *hw) 940 { 941 struct ieee80211_local *local = hw_to_local(hw); 942 int result, i; 943 enum nl80211_band band; 944 int channels, max_bitrates; 945 bool supp_ht, supp_vht, supp_he, supp_eht; 946 struct cfg80211_chan_def dflt_chandef = {}; 947 948 if (ieee80211_hw_check(hw, QUEUE_CONTROL) && 949 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 950 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 951 return -EINVAL; 952 953 if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && 954 (!local->ops->tdls_channel_switch || 955 !local->ops->tdls_cancel_channel_switch || 956 !local->ops->tdls_recv_channel_switch)) 957 return -EOPNOTSUPP; 958 959 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && 960 !local->ops->set_frag_threshold)) 961 return -EINVAL; 962 963 if (WARN_ON(local->hw.wiphy->interface_modes & 964 BIT(NL80211_IFTYPE_NAN) && 965 (!local->ops->start_nan || !local->ops->stop_nan))) 966 return -EINVAL; 967 968 if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { 969 /* 970 * For drivers capable of doing MLO, assume modern driver 971 * or firmware facilities, so software doesn't have to do 972 * as much, e.g. monitoring beacons would be hard if we 973 * might not even know which link is active at which time. 974 */ 975 if (WARN_ON(!local->use_chanctx)) 976 return -EINVAL; 977 978 if (WARN_ON(!local->ops->link_info_changed)) 979 return -EINVAL; 980 981 if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) 982 return -EINVAL; 983 984 if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) 985 return -EINVAL; 986 987 if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) 988 return -EINVAL; 989 990 if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && 991 (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || 992 ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) 993 return -EINVAL; 994 995 if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) 996 return -EINVAL; 997 998 if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) 999 return -EINVAL; 1000 1001 if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) 1002 return -EINVAL; 1003 1004 if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) 1005 return -EINVAL; 1006 1007 if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) 1008 return -EINVAL; 1009 1010 if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) 1011 return -EINVAL; 1012 } 1013 1014 #ifdef CONFIG_PM 1015 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 1016 return -EINVAL; 1017 #endif 1018 1019 if (!local->use_chanctx) { 1020 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1021 const struct ieee80211_iface_combination *comb; 1022 1023 comb = &local->hw.wiphy->iface_combinations[i]; 1024 1025 if (comb->num_different_channels > 1) 1026 return -EINVAL; 1027 } 1028 } else { 1029 /* DFS is not supported with multi-channel combinations yet */ 1030 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 1031 const struct ieee80211_iface_combination *comb; 1032 1033 comb = &local->hw.wiphy->iface_combinations[i]; 1034 1035 if (comb->radar_detect_widths && 1036 comb->num_different_channels > 1) 1037 return -EINVAL; 1038 } 1039 } 1040 1041 /* Only HW csum features are currently compatible with mac80211 */ 1042 if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) 1043 return -EINVAL; 1044 1045 if (hw->max_report_rates == 0) 1046 hw->max_report_rates = hw->max_rates; 1047 1048 local->rx_chains = 1; 1049 1050 /* 1051 * generic code guarantees at least one band, 1052 * set this very early because much code assumes 1053 * that hw.conf.channel is assigned 1054 */ 1055 channels = 0; 1056 max_bitrates = 0; 1057 supp_ht = false; 1058 supp_vht = false; 1059 supp_he = false; 1060 supp_eht = false; 1061 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1062 struct ieee80211_supported_band *sband; 1063 1064 sband = local->hw.wiphy->bands[band]; 1065 if (!sband) 1066 continue; 1067 1068 if (!dflt_chandef.chan) { 1069 /* 1070 * Assign the first enabled channel to dflt_chandef 1071 * from the list of channels 1072 */ 1073 for (i = 0; i < sband->n_channels; i++) 1074 if (!(sband->channels[i].flags & 1075 IEEE80211_CHAN_DISABLED)) 1076 break; 1077 /* if none found then use the first anyway */ 1078 if (i == sband->n_channels) 1079 i = 0; 1080 cfg80211_chandef_create(&dflt_chandef, 1081 &sband->channels[i], 1082 NL80211_CHAN_NO_HT); 1083 /* init channel we're on */ 1084 if (!local->use_chanctx && !local->_oper_chandef.chan) { 1085 local->hw.conf.chandef = dflt_chandef; 1086 local->_oper_chandef = dflt_chandef; 1087 } 1088 local->monitor_chandef = dflt_chandef; 1089 } 1090 1091 channels += sband->n_channels; 1092 1093 /* 1094 * Due to the way the aggregation code handles this and it 1095 * being an HT capability, we can't really support delayed 1096 * BA in MLO (yet). 1097 */ 1098 if (WARN_ON(sband->ht_cap.ht_supported && 1099 (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && 1100 hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) 1101 return -EINVAL; 1102 1103 if (max_bitrates < sband->n_bitrates) 1104 max_bitrates = sband->n_bitrates; 1105 supp_ht = supp_ht || sband->ht_cap.ht_supported; 1106 supp_vht = supp_vht || sband->vht_cap.vht_supported; 1107 1108 for (i = 0; i < sband->n_iftype_data; i++) { 1109 const struct ieee80211_sband_iftype_data *iftd; 1110 1111 iftd = &sband->iftype_data[i]; 1112 1113 supp_he = supp_he || iftd->he_cap.has_he; 1114 supp_eht = supp_eht || iftd->eht_cap.has_eht; 1115 } 1116 1117 /* HT, VHT, HE require QoS, thus >= 4 queues */ 1118 if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && 1119 (supp_ht || supp_vht || supp_he))) 1120 return -EINVAL; 1121 1122 /* EHT requires HE support */ 1123 if (WARN_ON(supp_eht && !supp_he)) 1124 return -EINVAL; 1125 1126 if (!sband->ht_cap.ht_supported) 1127 continue; 1128 1129 /* TODO: consider VHT for RX chains, hopefully it's the same */ 1130 local->rx_chains = 1131 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 1132 local->rx_chains); 1133 1134 /* no need to mask, SM_PS_DISABLED has all bits set */ 1135 sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1136 IEEE80211_HT_CAP_SM_PS_SHIFT; 1137 } 1138 1139 /* if low-level driver supports AP, we also support VLAN. 1140 * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN 1141 * based on their support to transmit SW encrypted packets. 1142 */ 1143 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && 1144 !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { 1145 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 1146 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 1147 } 1148 1149 /* mac80211 always supports monitor */ 1150 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 1151 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 1152 1153 /* mac80211 doesn't support more than one IBSS interface right now */ 1154 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 1155 const struct ieee80211_iface_combination *c; 1156 int j; 1157 1158 c = &hw->wiphy->iface_combinations[i]; 1159 1160 for (j = 0; j < c->n_limits; j++) 1161 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 1162 c->limits[j].max > 1) 1163 return -EINVAL; 1164 } 1165 1166 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 1167 sizeof(void *) * channels, GFP_KERNEL); 1168 if (!local->int_scan_req) 1169 return -ENOMEM; 1170 1171 eth_broadcast_addr(local->int_scan_req->bssid); 1172 1173 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1174 if (!local->hw.wiphy->bands[band]) 1175 continue; 1176 local->int_scan_req->rates[band] = (u32) -1; 1177 } 1178 1179 #ifndef CONFIG_MAC80211_MESH 1180 /* mesh depends on Kconfig, but drivers should set it if they want */ 1181 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 1182 #endif 1183 1184 /* if the underlying driver supports mesh, mac80211 will (at least) 1185 * provide routing of mesh authentication frames to userspace */ 1186 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 1187 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 1188 1189 /* mac80211 supports control port protocol changing */ 1190 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 1191 1192 if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { 1193 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 1194 } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { 1195 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 1196 if (hw->max_signal <= 0) { 1197 result = -EINVAL; 1198 goto fail_workqueue; 1199 } 1200 } 1201 1202 /* Mac80211 and therefore all drivers using SW crypto only 1203 * are able to handle PTK rekeys and Extended Key ID. 1204 */ 1205 if (!local->ops->set_key) { 1206 wiphy_ext_feature_set(local->hw.wiphy, 1207 NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); 1208 wiphy_ext_feature_set(local->hw.wiphy, 1209 NL80211_EXT_FEATURE_EXT_KEY_ID); 1210 } 1211 1212 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) 1213 wiphy_ext_feature_set(local->hw.wiphy, 1214 NL80211_EXT_FEATURE_DEL_IBSS_STA); 1215 1216 /* 1217 * Calculate scan IE length -- we need this to alloc 1218 * memory and to subtract from the driver limit. It 1219 * includes the DS Params, (extended) supported rates, and HT 1220 * information -- SSID is the driver's responsibility. 1221 */ 1222 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 1223 3 /* DS Params */; 1224 if (supp_ht) 1225 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 1226 1227 if (supp_vht) 1228 local->scan_ies_len += 1229 2 + sizeof(struct ieee80211_vht_cap); 1230 1231 /* 1232 * HE cap element is variable in size - set len to allow max size */ 1233 if (supp_he) { 1234 local->scan_ies_len += 1235 3 + sizeof(struct ieee80211_he_cap_elem) + 1236 sizeof(struct ieee80211_he_mcs_nss_supp) + 1237 IEEE80211_HE_PPE_THRES_MAX_LEN; 1238 1239 if (supp_eht) 1240 local->scan_ies_len += 1241 3 + sizeof(struct ieee80211_eht_cap_elem) + 1242 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1243 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1244 } 1245 1246 if (!local->ops->hw_scan) { 1247 /* For hw_scan, driver needs to set these up. */ 1248 local->hw.wiphy->max_scan_ssids = 4; 1249 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 1250 } 1251 1252 /* 1253 * If the driver supports any scan IEs, then assume the 1254 * limit includes the IEs mac80211 will add, otherwise 1255 * leave it at zero and let the driver sort it out; we 1256 * still pass our IEs to the driver but userspace will 1257 * not be allowed to in that case. 1258 */ 1259 if (local->hw.wiphy->max_scan_ie_len) 1260 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 1261 1262 result = ieee80211_init_cipher_suites(local); 1263 if (result < 0) 1264 goto fail_workqueue; 1265 1266 if (!local->ops->remain_on_channel) 1267 local->hw.wiphy->max_remain_on_channel_duration = 5000; 1268 1269 /* mac80211 based drivers don't support internal TDLS setup */ 1270 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 1271 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 1272 1273 /* mac80211 supports eCSA, if the driver supports STA CSA at all */ 1274 if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) 1275 local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; 1276 1277 /* mac80211 supports multi BSSID, if the driver supports it */ 1278 if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { 1279 local->hw.wiphy->support_mbssid = true; 1280 if (ieee80211_hw_check(&local->hw, 1281 SUPPORTS_ONLY_HE_MULTI_BSSID)) 1282 local->hw.wiphy->support_only_he_mbssid = true; 1283 else 1284 local->ext_capa[2] |= 1285 WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1286 } 1287 1288 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; 1289 1290 /* 1291 * We use the number of queues for feature tests (QoS, HT) internally 1292 * so restrict them appropriately. 1293 */ 1294 if (hw->queues > IEEE80211_MAX_QUEUES) 1295 hw->queues = IEEE80211_MAX_QUEUES; 1296 1297 local->workqueue = 1298 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 1299 if (!local->workqueue) { 1300 result = -ENOMEM; 1301 goto fail_workqueue; 1302 } 1303 1304 /* 1305 * The hardware needs headroom for sending the frame, 1306 * and we need some headroom for passing the frame to monitor 1307 * interfaces, but never both at the same time. 1308 */ 1309 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 1310 IEEE80211_TX_STATUS_HEADROOM); 1311 1312 /* 1313 * if the driver doesn't specify a max listen interval we 1314 * use 5 which should be a safe default 1315 */ 1316 if (local->hw.max_listen_interval == 0) 1317 local->hw.max_listen_interval = 5; 1318 1319 local->hw.conf.listen_interval = local->hw.max_listen_interval; 1320 1321 local->dynamic_ps_forced_timeout = -1; 1322 1323 if (!local->hw.max_nan_de_entries) 1324 local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; 1325 1326 if (!local->hw.weight_multiplier) 1327 local->hw.weight_multiplier = 1; 1328 1329 ieee80211_wep_init(local); 1330 1331 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1332 1333 ieee80211_led_init(local); 1334 1335 result = ieee80211_txq_setup_flows(local); 1336 if (result) 1337 goto fail_flows; 1338 1339 rtnl_lock(); 1340 result = ieee80211_init_rate_ctrl_alg(local, 1341 hw->rate_control_algorithm); 1342 rtnl_unlock(); 1343 if (result < 0) { 1344 wiphy_debug(local->hw.wiphy, 1345 "Failed to initialize rate control algorithm\n"); 1346 goto fail_rate; 1347 } 1348 1349 if (local->rate_ctrl) { 1350 clear_bit(IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, hw->flags); 1351 if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) 1352 ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); 1353 } 1354 1355 /* 1356 * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, 1357 * or have it when we don't, copy the sband structure and set/clear it. 1358 * This is necessary because rate scaling algorithms could be switched 1359 * and have different support values. 1360 * Print a message so that in the common case the reallocation can be 1361 * avoided. 1362 */ 1363 BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); 1364 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1365 struct ieee80211_supported_band *sband; 1366 bool local_cap, ie_cap; 1367 1368 local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); 1369 1370 sband = local->hw.wiphy->bands[band]; 1371 if (!sband || !sband->vht_cap.vht_supported) 1372 continue; 1373 1374 ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & 1375 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); 1376 1377 if (local_cap == ie_cap) 1378 continue; 1379 1380 sband = kmemdup(sband, sizeof(*sband), GFP_KERNEL); 1381 if (!sband) { 1382 result = -ENOMEM; 1383 goto fail_rate; 1384 } 1385 1386 wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n", 1387 band); 1388 1389 sband->vht_cap.vht_mcs.tx_highest ^= 1390 cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); 1391 1392 local->hw.wiphy->bands[band] = sband; 1393 local->sband_allocated |= BIT(band); 1394 } 1395 1396 result = wiphy_register(local->hw.wiphy); 1397 if (result < 0) 1398 goto fail_wiphy_register; 1399 1400 debugfs_hw_add(local); 1401 rate_control_add_debugfs(local); 1402 1403 rtnl_lock(); 1404 wiphy_lock(hw->wiphy); 1405 1406 /* add one default STA interface if supported */ 1407 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && 1408 !ieee80211_hw_check(hw, NO_AUTO_VIF)) { 1409 struct vif_params params = {0}; 1410 1411 result = ieee80211_if_add(local, "wlan%d", NET_NAME_ENUM, NULL, 1412 NL80211_IFTYPE_STATION, ¶ms); 1413 if (result) 1414 wiphy_warn(local->hw.wiphy, 1415 "Failed to add default virtual iface\n"); 1416 } 1417 1418 wiphy_unlock(hw->wiphy); 1419 rtnl_unlock(); 1420 1421 #ifdef CONFIG_INET 1422 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1423 result = register_inetaddr_notifier(&local->ifa_notifier); 1424 if (result) 1425 goto fail_ifa; 1426 #endif 1427 1428 #if IS_ENABLED(CONFIG_IPV6) 1429 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1430 result = register_inet6addr_notifier(&local->ifa6_notifier); 1431 if (result) 1432 goto fail_ifa6; 1433 #endif 1434 1435 return 0; 1436 1437 #if IS_ENABLED(CONFIG_IPV6) 1438 fail_ifa6: 1439 #ifdef CONFIG_INET 1440 unregister_inetaddr_notifier(&local->ifa_notifier); 1441 #endif 1442 #endif 1443 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1444 fail_ifa: 1445 #endif 1446 wiphy_unregister(local->hw.wiphy); 1447 fail_wiphy_register: 1448 rtnl_lock(); 1449 rate_control_deinitialize(local); 1450 ieee80211_remove_interfaces(local); 1451 rtnl_unlock(); 1452 fail_rate: 1453 fail_flows: 1454 ieee80211_led_exit(local); 1455 destroy_workqueue(local->workqueue); 1456 fail_workqueue: 1457 if (local->wiphy_ciphers_allocated) { 1458 kfree(local->hw.wiphy->cipher_suites); 1459 local->wiphy_ciphers_allocated = false; 1460 } 1461 kfree(local->int_scan_req); 1462 return result; 1463 } 1464 EXPORT_SYMBOL(ieee80211_register_hw); 1465 1466 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1467 { 1468 struct ieee80211_local *local = hw_to_local(hw); 1469 1470 tasklet_kill(&local->tx_pending_tasklet); 1471 tasklet_kill(&local->tasklet); 1472 1473 #ifdef CONFIG_INET 1474 unregister_inetaddr_notifier(&local->ifa_notifier); 1475 #endif 1476 #if IS_ENABLED(CONFIG_IPV6) 1477 unregister_inet6addr_notifier(&local->ifa6_notifier); 1478 #endif 1479 1480 rtnl_lock(); 1481 1482 /* 1483 * At this point, interface list manipulations are fine 1484 * because the driver cannot be handing us frames any 1485 * more and the tasklet is killed. 1486 */ 1487 ieee80211_remove_interfaces(local); 1488 1489 wiphy_lock(local->hw.wiphy); 1490 wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work); 1491 wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work); 1492 wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work); 1493 wiphy_unlock(local->hw.wiphy); 1494 rtnl_unlock(); 1495 1496 cancel_work_sync(&local->restart_work); 1497 cancel_work_sync(&local->reconfig_filter); 1498 1499 ieee80211_clear_tx_pending(local); 1500 rate_control_deinitialize(local); 1501 1502 if (skb_queue_len(&local->skb_queue) || 1503 skb_queue_len(&local->skb_queue_unreliable)) 1504 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1505 skb_queue_purge(&local->skb_queue); 1506 skb_queue_purge(&local->skb_queue_unreliable); 1507 1508 wiphy_unregister(local->hw.wiphy); 1509 destroy_workqueue(local->workqueue); 1510 ieee80211_led_exit(local); 1511 kfree(local->int_scan_req); 1512 } 1513 EXPORT_SYMBOL(ieee80211_unregister_hw); 1514 1515 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1516 { 1517 WARN_ONCE(1, "Have pending ack frames!\n"); 1518 kfree_skb(p); 1519 return 0; 1520 } 1521 1522 void ieee80211_free_hw(struct ieee80211_hw *hw) 1523 { 1524 struct ieee80211_local *local = hw_to_local(hw); 1525 enum nl80211_band band; 1526 1527 mutex_destroy(&local->iflist_mtx); 1528 mutex_destroy(&local->mtx); 1529 1530 if (local->wiphy_ciphers_allocated) { 1531 kfree(local->hw.wiphy->cipher_suites); 1532 local->wiphy_ciphers_allocated = false; 1533 } 1534 1535 idr_for_each(&local->ack_status_frames, 1536 ieee80211_free_ack_frame, NULL); 1537 idr_destroy(&local->ack_status_frames); 1538 1539 sta_info_stop(local); 1540 1541 ieee80211_free_led_names(local); 1542 1543 for (band = 0; band < NUM_NL80211_BANDS; band++) { 1544 if (!(local->sband_allocated & BIT(band))) 1545 continue; 1546 kfree(local->hw.wiphy->bands[band]); 1547 } 1548 1549 wiphy_free(local->hw.wiphy); 1550 } 1551 EXPORT_SYMBOL(ieee80211_free_hw); 1552 1553 static const char * const drop_reasons_monitor[] = { 1554 #define V(x) #x, 1555 [0] = "RX_DROP_MONITOR", 1556 MAC80211_DROP_REASONS_MONITOR(V) 1557 }; 1558 1559 static struct drop_reason_list drop_reason_list_monitor = { 1560 .reasons = drop_reasons_monitor, 1561 .n_reasons = ARRAY_SIZE(drop_reasons_monitor), 1562 }; 1563 1564 static const char * const drop_reasons_unusable[] = { 1565 [0] = "RX_DROP_UNUSABLE", 1566 MAC80211_DROP_REASONS_UNUSABLE(V) 1567 #undef V 1568 }; 1569 1570 static struct drop_reason_list drop_reason_list_unusable = { 1571 .reasons = drop_reasons_unusable, 1572 .n_reasons = ARRAY_SIZE(drop_reasons_unusable), 1573 }; 1574 1575 static int __init ieee80211_init(void) 1576 { 1577 struct sk_buff *skb; 1578 int ret; 1579 1580 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1581 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1582 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1583 1584 ret = rc80211_minstrel_init(); 1585 if (ret) 1586 return ret; 1587 1588 ret = ieee80211_iface_init(); 1589 if (ret) 1590 goto err_netdev; 1591 1592 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, 1593 &drop_reason_list_monitor); 1594 drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, 1595 &drop_reason_list_unusable); 1596 1597 return 0; 1598 err_netdev: 1599 rc80211_minstrel_exit(); 1600 1601 return ret; 1602 } 1603 1604 static void __exit ieee80211_exit(void) 1605 { 1606 rc80211_minstrel_exit(); 1607 1608 ieee80211s_stop(); 1609 1610 ieee80211_iface_exit(); 1611 1612 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); 1613 drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); 1614 1615 rcu_barrier(); 1616 } 1617 1618 1619 subsys_initcall(ieee80211_init); 1620 module_exit(ieee80211_exit); 1621 1622 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1623 MODULE_LICENSE("GPL"); 1624