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