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(v: &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(lock: &local->filter_lock); |
72 | changed_flags = local->filter_flags ^ new_flags; |
73 | |
74 | mc = drv_prepare_multicast(local, mc_list: &local->mc_list); |
75 | spin_unlock_bh(lock: &local->filter_lock); |
76 | |
77 | /* be a bit nasty */ |
78 | new_flags |= (1<<31); |
79 | |
80 | drv_configure_filter(local, changed_flags, total_flags: &new_flags, multicast: 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 wiphy *wiphy, |
88 | struct wiphy_work *work) |
89 | { |
90 | struct ieee80211_local *local = |
91 | container_of(work, struct ieee80211_local, reconfig_filter); |
92 | |
93 | ieee80211_configure_filter(local); |
94 | } |
95 | |
96 | static u32 ieee80211_calc_hw_conf_chan(struct ieee80211_local *local, |
97 | struct ieee80211_chanctx_conf *ctx) |
98 | { |
99 | struct ieee80211_sub_if_data *sdata; |
100 | struct cfg80211_chan_def chandef = {}; |
101 | struct cfg80211_chan_def *oper = NULL; |
102 | enum ieee80211_smps_mode smps_mode = IEEE80211_SMPS_STATIC; |
103 | u32 changed = 0; |
104 | int power; |
105 | u32 offchannel_flag; |
106 | |
107 | if (!local->emulate_chanctx) |
108 | return 0; |
109 | |
110 | offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; |
111 | |
112 | if (ctx && !WARN_ON(!ctx->def.chan)) { |
113 | oper = &ctx->def; |
114 | if (ctx->rx_chains_static > 1) |
115 | smps_mode = IEEE80211_SMPS_OFF; |
116 | else if (ctx->rx_chains_dynamic > 1) |
117 | smps_mode = IEEE80211_SMPS_DYNAMIC; |
118 | else |
119 | smps_mode = IEEE80211_SMPS_STATIC; |
120 | } |
121 | |
122 | if (local->scan_chandef.chan) { |
123 | chandef = local->scan_chandef; |
124 | } else if (local->tmp_channel) { |
125 | chandef.chan = local->tmp_channel; |
126 | chandef.width = NL80211_CHAN_WIDTH_20_NOHT; |
127 | chandef.center_freq1 = chandef.chan->center_freq; |
128 | chandef.freq1_offset = chandef.chan->freq_offset; |
129 | } else if (oper) { |
130 | chandef = *oper; |
131 | } else { |
132 | chandef = local->dflt_chandef; |
133 | } |
134 | |
135 | if (WARN(!cfg80211_chandef_valid(&chandef), |
136 | "control:%d.%03d MHz width:%d center: %d.%03d/%d MHz" , |
137 | chandef.chan ? chandef.chan->center_freq : -1, |
138 | chandef.chan ? chandef.chan->freq_offset : 0, |
139 | chandef.width, chandef.center_freq1, chandef.freq1_offset, |
140 | chandef.center_freq2)) |
141 | return 0; |
142 | |
143 | if (!oper || !cfg80211_chandef_identical(chandef1: &chandef, chandef2: oper)) |
144 | local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; |
145 | else |
146 | local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; |
147 | |
148 | offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; |
149 | |
150 | /* force it also for scanning, since drivers might config differently */ |
151 | if (offchannel_flag || local->scanning || |
152 | !cfg80211_chandef_identical(chandef1: &local->hw.conf.chandef, chandef2: &chandef)) { |
153 | local->hw.conf.chandef = chandef; |
154 | changed |= IEEE80211_CONF_CHANGE_CHANNEL; |
155 | } |
156 | |
157 | if (!conf_is_ht(conf: &local->hw.conf)) { |
158 | /* |
159 | * mac80211.h documents that this is only valid |
160 | * when the channel is set to an HT type, and |
161 | * that otherwise STATIC is used. |
162 | */ |
163 | local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; |
164 | } else if (local->hw.conf.smps_mode != smps_mode) { |
165 | local->hw.conf.smps_mode = smps_mode; |
166 | changed |= IEEE80211_CONF_CHANGE_SMPS; |
167 | } |
168 | |
169 | power = ieee80211_chandef_max_power(chandef: &chandef); |
170 | |
171 | rcu_read_lock(); |
172 | list_for_each_entry_rcu(sdata, &local->interfaces, list) { |
173 | if (!rcu_access_pointer(sdata->vif.bss_conf.chanctx_conf)) |
174 | continue; |
175 | if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
176 | continue; |
177 | if (sdata->vif.bss_conf.txpower == INT_MIN) |
178 | continue; |
179 | power = min(power, sdata->vif.bss_conf.txpower); |
180 | } |
181 | rcu_read_unlock(); |
182 | |
183 | if (local->hw.conf.power_level != power) { |
184 | changed |= IEEE80211_CONF_CHANGE_POWER; |
185 | local->hw.conf.power_level = power; |
186 | } |
187 | |
188 | return changed; |
189 | } |
190 | |
191 | int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) |
192 | { |
193 | int ret = 0; |
194 | |
195 | might_sleep(); |
196 | |
197 | WARN_ON(changed & (IEEE80211_CONF_CHANGE_CHANNEL | |
198 | IEEE80211_CONF_CHANGE_POWER | |
199 | IEEE80211_CONF_CHANGE_SMPS)); |
200 | |
201 | if (changed && local->open_count) { |
202 | ret = drv_config(local, changed); |
203 | /* |
204 | * Goal: |
205 | * HW reconfiguration should never fail, the driver has told |
206 | * us what it can support so it should live up to that promise. |
207 | * |
208 | * Current status: |
209 | * rfkill is not integrated with mac80211 and a |
210 | * configuration command can thus fail if hardware rfkill |
211 | * is enabled |
212 | * |
213 | * FIXME: integrate rfkill with mac80211 and then add this |
214 | * WARN_ON() back |
215 | * |
216 | */ |
217 | /* WARN_ON(ret); */ |
218 | } |
219 | |
220 | return ret; |
221 | } |
222 | |
223 | /* for scanning, offchannel and chanctx emulation only */ |
224 | static int _ieee80211_hw_conf_chan(struct ieee80211_local *local, |
225 | struct ieee80211_chanctx_conf *ctx) |
226 | { |
227 | u32 changed; |
228 | |
229 | if (!local->open_count) |
230 | return 0; |
231 | |
232 | changed = ieee80211_calc_hw_conf_chan(local, ctx); |
233 | if (!changed) |
234 | return 0; |
235 | |
236 | return drv_config(local, changed); |
237 | } |
238 | |
239 | int ieee80211_hw_conf_chan(struct ieee80211_local *local) |
240 | { |
241 | struct ieee80211_chanctx *ctx; |
242 | |
243 | ctx = list_first_entry_or_null(&local->chanctx_list, |
244 | struct ieee80211_chanctx, |
245 | list); |
246 | |
247 | return _ieee80211_hw_conf_chan(local, ctx: ctx ? &ctx->conf : NULL); |
248 | } |
249 | |
250 | void ieee80211_hw_conf_init(struct ieee80211_local *local) |
251 | { |
252 | u32 changed = ~(IEEE80211_CONF_CHANGE_CHANNEL | |
253 | IEEE80211_CONF_CHANGE_POWER | |
254 | IEEE80211_CONF_CHANGE_SMPS); |
255 | |
256 | if (WARN_ON(!local->open_count)) |
257 | return; |
258 | |
259 | if (local->emulate_chanctx) { |
260 | struct ieee80211_chanctx *ctx; |
261 | |
262 | ctx = list_first_entry_or_null(&local->chanctx_list, |
263 | struct ieee80211_chanctx, |
264 | list); |
265 | |
266 | changed |= ieee80211_calc_hw_conf_chan(local, |
267 | ctx: ctx ? &ctx->conf : NULL); |
268 | } |
269 | |
270 | WARN_ON(drv_config(local, changed)); |
271 | } |
272 | |
273 | int ieee80211_emulate_add_chanctx(struct ieee80211_hw *hw, |
274 | struct ieee80211_chanctx_conf *ctx) |
275 | { |
276 | struct ieee80211_local *local = hw_to_local(hw); |
277 | |
278 | local->hw.conf.radar_enabled = ctx->radar_enabled; |
279 | |
280 | return _ieee80211_hw_conf_chan(local, ctx); |
281 | } |
282 | EXPORT_SYMBOL(ieee80211_emulate_add_chanctx); |
283 | |
284 | void ieee80211_emulate_remove_chanctx(struct ieee80211_hw *hw, |
285 | struct ieee80211_chanctx_conf *ctx) |
286 | { |
287 | struct ieee80211_local *local = hw_to_local(hw); |
288 | |
289 | local->hw.conf.radar_enabled = false; |
290 | |
291 | _ieee80211_hw_conf_chan(local, NULL); |
292 | } |
293 | EXPORT_SYMBOL(ieee80211_emulate_remove_chanctx); |
294 | |
295 | void ieee80211_emulate_change_chanctx(struct ieee80211_hw *hw, |
296 | struct ieee80211_chanctx_conf *ctx, |
297 | u32 changed) |
298 | { |
299 | struct ieee80211_local *local = hw_to_local(hw); |
300 | |
301 | local->hw.conf.radar_enabled = ctx->radar_enabled; |
302 | |
303 | _ieee80211_hw_conf_chan(local, ctx); |
304 | } |
305 | EXPORT_SYMBOL(ieee80211_emulate_change_chanctx); |
306 | |
307 | int ieee80211_emulate_switch_vif_chanctx(struct ieee80211_hw *hw, |
308 | struct ieee80211_vif_chanctx_switch *vifs, |
309 | int n_vifs, |
310 | enum ieee80211_chanctx_switch_mode mode) |
311 | { |
312 | struct ieee80211_local *local = hw_to_local(hw); |
313 | |
314 | if (n_vifs <= 0) |
315 | return -EINVAL; |
316 | |
317 | local->hw.conf.radar_enabled = vifs[0].new_ctx->radar_enabled; |
318 | _ieee80211_hw_conf_chan(local, ctx: vifs[0].new_ctx); |
319 | |
320 | return 0; |
321 | } |
322 | EXPORT_SYMBOL(ieee80211_emulate_switch_vif_chanctx); |
323 | |
324 | #define BSS_CHANGED_VIF_CFG_FLAGS (BSS_CHANGED_ASSOC |\ |
325 | BSS_CHANGED_IDLE |\ |
326 | BSS_CHANGED_PS |\ |
327 | BSS_CHANGED_IBSS |\ |
328 | BSS_CHANGED_ARP_FILTER |\ |
329 | BSS_CHANGED_SSID |\ |
330 | BSS_CHANGED_MLD_VALID_LINKS |\ |
331 | BSS_CHANGED_MLD_TTLM) |
332 | |
333 | void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, |
334 | u64 changed) |
335 | { |
336 | struct ieee80211_local *local = sdata->local; |
337 | |
338 | might_sleep(); |
339 | |
340 | if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
341 | return; |
342 | |
343 | if (WARN_ON_ONCE(changed & (BSS_CHANGED_BEACON | |
344 | BSS_CHANGED_BEACON_ENABLED) && |
345 | sdata->vif.type != NL80211_IFTYPE_AP && |
346 | sdata->vif.type != NL80211_IFTYPE_ADHOC && |
347 | sdata->vif.type != NL80211_IFTYPE_MESH_POINT && |
348 | sdata->vif.type != NL80211_IFTYPE_OCB)) |
349 | return; |
350 | |
351 | if (WARN_ON_ONCE(sdata->vif.type == NL80211_IFTYPE_P2P_DEVICE || |
352 | sdata->vif.type == NL80211_IFTYPE_NAN || |
353 | (sdata->vif.type == NL80211_IFTYPE_MONITOR && |
354 | !sdata->vif.bss_conf.mu_mimo_owner && |
355 | !(changed & BSS_CHANGED_TXPOWER)))) |
356 | return; |
357 | |
358 | if (!check_sdata_in_driver(sdata)) |
359 | return; |
360 | |
361 | if (changed & BSS_CHANGED_VIF_CFG_FLAGS) { |
362 | u64 ch = changed & BSS_CHANGED_VIF_CFG_FLAGS; |
363 | |
364 | trace_drv_vif_cfg_changed(local, sdata, changed); |
365 | if (local->ops->vif_cfg_changed) |
366 | local->ops->vif_cfg_changed(&local->hw, &sdata->vif, ch); |
367 | } |
368 | |
369 | if (changed & ~BSS_CHANGED_VIF_CFG_FLAGS) { |
370 | u64 ch = changed & ~BSS_CHANGED_VIF_CFG_FLAGS; |
371 | |
372 | /* FIXME: should be for each link */ |
373 | trace_drv_link_info_changed(local, sdata, link_conf: &sdata->vif.bss_conf, |
374 | changed); |
375 | if (local->ops->link_info_changed) |
376 | local->ops->link_info_changed(&local->hw, &sdata->vif, |
377 | &sdata->vif.bss_conf, ch); |
378 | } |
379 | |
380 | if (local->ops->bss_info_changed) |
381 | local->ops->bss_info_changed(&local->hw, &sdata->vif, |
382 | &sdata->vif.bss_conf, changed); |
383 | trace_drv_return_void(local); |
384 | } |
385 | |
386 | void ieee80211_vif_cfg_change_notify(struct ieee80211_sub_if_data *sdata, |
387 | u64 changed) |
388 | { |
389 | struct ieee80211_local *local = sdata->local; |
390 | |
391 | WARN_ON_ONCE(changed & ~BSS_CHANGED_VIF_CFG_FLAGS); |
392 | |
393 | if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
394 | return; |
395 | |
396 | drv_vif_cfg_changed(local, sdata, changed); |
397 | } |
398 | |
399 | void ieee80211_link_info_change_notify(struct ieee80211_sub_if_data *sdata, |
400 | struct ieee80211_link_data *link, |
401 | u64 changed) |
402 | { |
403 | struct ieee80211_local *local = sdata->local; |
404 | |
405 | WARN_ON_ONCE(changed & BSS_CHANGED_VIF_CFG_FLAGS); |
406 | |
407 | if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) |
408 | return; |
409 | |
410 | if (!check_sdata_in_driver(sdata)) |
411 | return; |
412 | |
413 | drv_link_info_changed(local, sdata, info: link->conf, link_id: link->link_id, changed); |
414 | } |
415 | |
416 | u64 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) |
417 | { |
418 | sdata->vif.bss_conf.use_cts_prot = false; |
419 | sdata->vif.bss_conf.use_short_preamble = false; |
420 | sdata->vif.bss_conf.use_short_slot = false; |
421 | return BSS_CHANGED_ERP_CTS_PROT | |
422 | BSS_CHANGED_ERP_PREAMBLE | |
423 | BSS_CHANGED_ERP_SLOT; |
424 | } |
425 | |
426 | static void ieee80211_tasklet_handler(struct tasklet_struct *t) |
427 | { |
428 | struct ieee80211_local *local = from_tasklet(local, t, tasklet); |
429 | struct sk_buff *skb; |
430 | |
431 | while ((skb = skb_dequeue(list: &local->skb_queue)) || |
432 | (skb = skb_dequeue(list: &local->skb_queue_unreliable))) { |
433 | switch (skb->pkt_type) { |
434 | case IEEE80211_RX_MSG: |
435 | /* Clear skb->pkt_type in order to not confuse kernel |
436 | * netstack. */ |
437 | skb->pkt_type = 0; |
438 | ieee80211_rx(hw: &local->hw, skb); |
439 | break; |
440 | case IEEE80211_TX_STATUS_MSG: |
441 | skb->pkt_type = 0; |
442 | ieee80211_tx_status_skb(hw: &local->hw, skb); |
443 | break; |
444 | default: |
445 | WARN(1, "mac80211: Packet is of unknown type %d\n" , |
446 | skb->pkt_type); |
447 | dev_kfree_skb(skb); |
448 | break; |
449 | } |
450 | } |
451 | } |
452 | |
453 | static void ieee80211_restart_work(struct work_struct *work) |
454 | { |
455 | struct ieee80211_local *local = |
456 | container_of(work, struct ieee80211_local, restart_work); |
457 | struct ieee80211_sub_if_data *sdata; |
458 | int ret; |
459 | |
460 | flush_workqueue(local->workqueue); |
461 | |
462 | rtnl_lock(); |
463 | /* we might do interface manipulations, so need both */ |
464 | wiphy_lock(wiphy: local->hw.wiphy); |
465 | wiphy_work_flush(wiphy: local->hw.wiphy, NULL); |
466 | |
467 | WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), |
468 | "%s called with hardware scan in progress\n" , __func__); |
469 | |
470 | list_for_each_entry(sdata, &local->interfaces, list) { |
471 | /* |
472 | * XXX: there may be more work for other vif types and even |
473 | * for station mode: a good thing would be to run most of |
474 | * the iface type's dependent _stop (ieee80211_mg_stop, |
475 | * ieee80211_ibss_stop) etc... |
476 | * For now, fix only the specific bug that was seen: race |
477 | * between csa_connection_drop_work and us. |
478 | */ |
479 | if (sdata->vif.type == NL80211_IFTYPE_STATION) { |
480 | /* |
481 | * This worker is scheduled from the iface worker that |
482 | * runs on mac80211's workqueue, so we can't be |
483 | * scheduling this worker after the cancel right here. |
484 | * The exception is ieee80211_chswitch_done. |
485 | * Then we can have a race... |
486 | */ |
487 | wiphy_work_cancel(wiphy: local->hw.wiphy, |
488 | work: &sdata->u.mgd.csa_connection_drop_work); |
489 | if (sdata->vif.bss_conf.csa_active) |
490 | ieee80211_sta_connection_lost(sdata, |
491 | reason: WLAN_REASON_UNSPECIFIED, |
492 | tx: false); |
493 | } |
494 | wiphy_delayed_work_flush(wiphy: local->hw.wiphy, |
495 | dwork: &sdata->dec_tailroom_needed_wk); |
496 | } |
497 | ieee80211_scan_cancel(local); |
498 | |
499 | /* make sure any new ROC will consider local->in_reconfig */ |
500 | wiphy_delayed_work_flush(wiphy: local->hw.wiphy, dwork: &local->roc_work); |
501 | wiphy_work_flush(wiphy: local->hw.wiphy, work: &local->hw_roc_done); |
502 | |
503 | /* wait for all packet processing to be done */ |
504 | synchronize_net(); |
505 | |
506 | ret = ieee80211_reconfig(local); |
507 | wiphy_unlock(wiphy: local->hw.wiphy); |
508 | |
509 | if (ret) |
510 | cfg80211_shutdown_all_interfaces(wiphy: local->hw.wiphy); |
511 | |
512 | rtnl_unlock(); |
513 | } |
514 | |
515 | void ieee80211_restart_hw(struct ieee80211_hw *hw) |
516 | { |
517 | struct ieee80211_local *local = hw_to_local(hw); |
518 | |
519 | trace_api_restart_hw(local); |
520 | |
521 | wiphy_info(hw->wiphy, |
522 | "Hardware restart was requested\n" ); |
523 | |
524 | /* use this reason, ieee80211_reconfig will unblock it */ |
525 | ieee80211_stop_queues_by_reason(hw, queues: IEEE80211_MAX_QUEUE_MAP, |
526 | reason: IEEE80211_QUEUE_STOP_REASON_SUSPEND, |
527 | refcounted: false); |
528 | |
529 | /* |
530 | * Stop all Rx during the reconfig. We don't want state changes |
531 | * or driver callbacks while this is in progress. |
532 | */ |
533 | local->in_reconfig = true; |
534 | barrier(); |
535 | |
536 | queue_work(wq: system_freezable_wq, work: &local->restart_work); |
537 | } |
538 | EXPORT_SYMBOL(ieee80211_restart_hw); |
539 | |
540 | #ifdef CONFIG_INET |
541 | static int ieee80211_ifa_changed(struct notifier_block *nb, |
542 | unsigned long data, void *arg) |
543 | { |
544 | struct in_ifaddr *ifa = arg; |
545 | struct ieee80211_local *local = |
546 | container_of(nb, struct ieee80211_local, |
547 | ifa_notifier); |
548 | struct net_device *ndev = ifa->ifa_dev->dev; |
549 | struct wireless_dev *wdev = ndev->ieee80211_ptr; |
550 | struct in_device *idev; |
551 | struct ieee80211_sub_if_data *sdata; |
552 | struct ieee80211_vif_cfg *vif_cfg; |
553 | struct ieee80211_if_managed *ifmgd; |
554 | int c = 0; |
555 | |
556 | /* Make sure it's our interface that got changed */ |
557 | if (!wdev) |
558 | return NOTIFY_DONE; |
559 | |
560 | if (wdev->wiphy != local->hw.wiphy || !wdev->registered) |
561 | return NOTIFY_DONE; |
562 | |
563 | sdata = IEEE80211_DEV_TO_SUB_IF(dev: ndev); |
564 | vif_cfg = &sdata->vif.cfg; |
565 | |
566 | /* ARP filtering is only supported in managed mode */ |
567 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
568 | return NOTIFY_DONE; |
569 | |
570 | idev = __in_dev_get_rtnl(dev: sdata->dev); |
571 | if (!idev) |
572 | return NOTIFY_DONE; |
573 | |
574 | ifmgd = &sdata->u.mgd; |
575 | |
576 | /* |
577 | * The nested here is needed to convince lockdep that this is |
578 | * all OK. Yes, we lock the wiphy mutex here while we already |
579 | * hold the notifier rwsem, that's the normal case. And yes, |
580 | * we also acquire the notifier rwsem again when unregistering |
581 | * a netdev while we already hold the wiphy mutex, so it does |
582 | * look like a typical ABBA deadlock. |
583 | * |
584 | * However, both of these things happen with the RTNL held |
585 | * already. Therefore, they can't actually happen, since the |
586 | * lock orders really are ABC and ACB, which is fine due to |
587 | * the RTNL (A). |
588 | * |
589 | * We still need to prevent recursion, which is accomplished |
590 | * by the !wdev->registered check above. |
591 | */ |
592 | mutex_lock_nested(lock: &local->hw.wiphy->mtx, subclass: 1); |
593 | __acquire(&local->hw.wiphy->mtx); |
594 | |
595 | /* Copy the addresses to the vif config list */ |
596 | ifa = rtnl_dereference(idev->ifa_list); |
597 | while (ifa) { |
598 | if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) |
599 | vif_cfg->arp_addr_list[c] = ifa->ifa_address; |
600 | ifa = rtnl_dereference(ifa->ifa_next); |
601 | c++; |
602 | } |
603 | |
604 | vif_cfg->arp_addr_cnt = c; |
605 | |
606 | /* Configure driver only if associated (which also implies it is up) */ |
607 | if (ifmgd->associated) |
608 | ieee80211_vif_cfg_change_notify(sdata, changed: BSS_CHANGED_ARP_FILTER); |
609 | |
610 | wiphy_unlock(wiphy: local->hw.wiphy); |
611 | |
612 | return NOTIFY_OK; |
613 | } |
614 | #endif |
615 | |
616 | #if IS_ENABLED(CONFIG_IPV6) |
617 | static int ieee80211_ifa6_changed(struct notifier_block *nb, |
618 | unsigned long data, void *arg) |
619 | { |
620 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; |
621 | struct inet6_dev *idev = ifa->idev; |
622 | struct net_device *ndev = ifa->idev->dev; |
623 | struct ieee80211_local *local = |
624 | container_of(nb, struct ieee80211_local, ifa6_notifier); |
625 | struct wireless_dev *wdev = ndev->ieee80211_ptr; |
626 | struct ieee80211_sub_if_data *sdata; |
627 | |
628 | /* Make sure it's our interface that got changed */ |
629 | if (!wdev || wdev->wiphy != local->hw.wiphy) |
630 | return NOTIFY_DONE; |
631 | |
632 | sdata = IEEE80211_DEV_TO_SUB_IF(dev: ndev); |
633 | |
634 | /* |
635 | * For now only support station mode. This is mostly because |
636 | * doing AP would have to handle AP_VLAN in some way ... |
637 | */ |
638 | if (sdata->vif.type != NL80211_IFTYPE_STATION) |
639 | return NOTIFY_DONE; |
640 | |
641 | drv_ipv6_addr_change(local, sdata, idev); |
642 | |
643 | return NOTIFY_OK; |
644 | } |
645 | #endif |
646 | |
647 | /* There isn't a lot of sense in it, but you can transmit anything you like */ |
648 | static const struct ieee80211_txrx_stypes |
649 | ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { |
650 | [NL80211_IFTYPE_ADHOC] = { |
651 | .tx = 0xffff, |
652 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | |
653 | BIT(IEEE80211_STYPE_AUTH >> 4) | |
654 | BIT(IEEE80211_STYPE_DEAUTH >> 4) | |
655 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4), |
656 | }, |
657 | [NL80211_IFTYPE_STATION] = { |
658 | .tx = 0xffff, |
659 | /* |
660 | * To support Pre Association Security Negotiation (PASN) while |
661 | * already associated to one AP, allow user space to register to |
662 | * Rx authentication frames, so that the user space logic would |
663 | * be able to receive/handle authentication frames from a |
664 | * different AP as part of PASN. |
665 | * It is expected that user space would intelligently register |
666 | * for Rx authentication frames, i.e., only when PASN is used |
667 | * and configure a match filter only for PASN authentication |
668 | * algorithm, as otherwise the MLME functionality of mac80211 |
669 | * would be broken. |
670 | */ |
671 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | |
672 | BIT(IEEE80211_STYPE_AUTH >> 4) | |
673 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4), |
674 | }, |
675 | [NL80211_IFTYPE_AP] = { |
676 | .tx = 0xffff, |
677 | .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | |
678 | BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | |
679 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | |
680 | BIT(IEEE80211_STYPE_DISASSOC >> 4) | |
681 | BIT(IEEE80211_STYPE_AUTH >> 4) | |
682 | BIT(IEEE80211_STYPE_DEAUTH >> 4) | |
683 | BIT(IEEE80211_STYPE_ACTION >> 4), |
684 | }, |
685 | [NL80211_IFTYPE_AP_VLAN] = { |
686 | /* copy AP */ |
687 | .tx = 0xffff, |
688 | .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | |
689 | BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | |
690 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | |
691 | BIT(IEEE80211_STYPE_DISASSOC >> 4) | |
692 | BIT(IEEE80211_STYPE_AUTH >> 4) | |
693 | BIT(IEEE80211_STYPE_DEAUTH >> 4) | |
694 | BIT(IEEE80211_STYPE_ACTION >> 4), |
695 | }, |
696 | [NL80211_IFTYPE_P2P_CLIENT] = { |
697 | .tx = 0xffff, |
698 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | |
699 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4), |
700 | }, |
701 | [NL80211_IFTYPE_P2P_GO] = { |
702 | .tx = 0xffff, |
703 | .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | |
704 | BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | |
705 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | |
706 | BIT(IEEE80211_STYPE_DISASSOC >> 4) | |
707 | BIT(IEEE80211_STYPE_AUTH >> 4) | |
708 | BIT(IEEE80211_STYPE_DEAUTH >> 4) | |
709 | BIT(IEEE80211_STYPE_ACTION >> 4), |
710 | }, |
711 | [NL80211_IFTYPE_MESH_POINT] = { |
712 | .tx = 0xffff, |
713 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | |
714 | BIT(IEEE80211_STYPE_AUTH >> 4) | |
715 | BIT(IEEE80211_STYPE_DEAUTH >> 4), |
716 | }, |
717 | [NL80211_IFTYPE_P2P_DEVICE] = { |
718 | .tx = 0xffff, |
719 | .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | |
720 | BIT(IEEE80211_STYPE_PROBE_REQ >> 4), |
721 | }, |
722 | }; |
723 | |
724 | static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { |
725 | .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | |
726 | IEEE80211_HT_AMPDU_PARM_DENSITY, |
727 | |
728 | .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | |
729 | IEEE80211_HT_CAP_MAX_AMSDU | |
730 | IEEE80211_HT_CAP_SGI_20 | |
731 | IEEE80211_HT_CAP_SGI_40 | |
732 | IEEE80211_HT_CAP_TX_STBC | |
733 | IEEE80211_HT_CAP_RX_STBC | |
734 | IEEE80211_HT_CAP_LDPC_CODING | |
735 | IEEE80211_HT_CAP_40MHZ_INTOLERANT), |
736 | .mcs = { |
737 | .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, |
738 | 0xff, 0xff, 0xff, 0xff, 0xff, }, |
739 | }, |
740 | }; |
741 | |
742 | static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { |
743 | .vht_cap_info = |
744 | cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | |
745 | IEEE80211_VHT_CAP_SHORT_GI_80 | |
746 | IEEE80211_VHT_CAP_SHORT_GI_160 | |
747 | IEEE80211_VHT_CAP_RXSTBC_MASK | |
748 | IEEE80211_VHT_CAP_TXSTBC | |
749 | IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | |
750 | IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | |
751 | IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | |
752 | IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | |
753 | IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), |
754 | .supp_mcs = { |
755 | .rx_mcs_map = cpu_to_le16(~0), |
756 | .tx_mcs_map = cpu_to_le16(~0), |
757 | }, |
758 | }; |
759 | |
760 | struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len, |
761 | const struct ieee80211_ops *ops, |
762 | const char *requested_name) |
763 | { |
764 | struct ieee80211_local *local; |
765 | int priv_size, i; |
766 | struct wiphy *wiphy; |
767 | bool emulate_chanctx; |
768 | |
769 | if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || |
770 | !ops->add_interface || !ops->remove_interface || |
771 | !ops->configure_filter || !ops->wake_tx_queue)) |
772 | return NULL; |
773 | |
774 | if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) |
775 | return NULL; |
776 | |
777 | if (WARN_ON(!!ops->link_info_changed != !!ops->vif_cfg_changed || |
778 | (ops->link_info_changed && ops->bss_info_changed))) |
779 | return NULL; |
780 | |
781 | /* check all or no channel context operations exist */ |
782 | if (ops->add_chanctx == ieee80211_emulate_add_chanctx && |
783 | ops->remove_chanctx == ieee80211_emulate_remove_chanctx && |
784 | ops->change_chanctx == ieee80211_emulate_change_chanctx) { |
785 | if (WARN_ON(ops->assign_vif_chanctx || |
786 | ops->unassign_vif_chanctx)) |
787 | return NULL; |
788 | emulate_chanctx = true; |
789 | } else { |
790 | if (WARN_ON(ops->add_chanctx == ieee80211_emulate_add_chanctx || |
791 | ops->remove_chanctx == ieee80211_emulate_remove_chanctx || |
792 | ops->change_chanctx == ieee80211_emulate_change_chanctx)) |
793 | return NULL; |
794 | if (WARN_ON(!ops->add_chanctx || |
795 | !ops->remove_chanctx || |
796 | !ops->change_chanctx || |
797 | !ops->assign_vif_chanctx || |
798 | !ops->unassign_vif_chanctx)) |
799 | return NULL; |
800 | emulate_chanctx = false; |
801 | } |
802 | |
803 | /* Ensure 32-byte alignment of our private data and hw private data. |
804 | * We use the wiphy priv data for both our ieee80211_local and for |
805 | * the driver's private data |
806 | * |
807 | * In memory it'll be like this: |
808 | * |
809 | * +-------------------------+ |
810 | * | struct wiphy | |
811 | * +-------------------------+ |
812 | * | struct ieee80211_local | |
813 | * +-------------------------+ |
814 | * | driver's private data | |
815 | * +-------------------------+ |
816 | * |
817 | */ |
818 | priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; |
819 | |
820 | wiphy = wiphy_new_nm(ops: &mac80211_config_ops, sizeof_priv: priv_size, requested_name); |
821 | |
822 | if (!wiphy) |
823 | return NULL; |
824 | |
825 | wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; |
826 | |
827 | wiphy->privid = mac80211_wiphy_privid; |
828 | |
829 | wiphy->flags |= WIPHY_FLAG_NETNS_OK | |
830 | WIPHY_FLAG_4ADDR_AP | |
831 | WIPHY_FLAG_4ADDR_STATION | |
832 | WIPHY_FLAG_REPORTS_OBSS | |
833 | WIPHY_FLAG_OFFCHAN_TX; |
834 | |
835 | if (emulate_chanctx || ops->remain_on_channel) |
836 | wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; |
837 | |
838 | wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | |
839 | NL80211_FEATURE_SAE | |
840 | NL80211_FEATURE_HT_IBSS | |
841 | NL80211_FEATURE_VIF_TXPOWER | |
842 | NL80211_FEATURE_MAC_ON_CREATE | |
843 | NL80211_FEATURE_USERSPACE_MPM | |
844 | NL80211_FEATURE_FULL_AP_CLIENT_STATE; |
845 | wiphy_ext_feature_set(wiphy, ftidx: NL80211_EXT_FEATURE_FILS_STA); |
846 | wiphy_ext_feature_set(wiphy, |
847 | ftidx: NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211); |
848 | wiphy_ext_feature_set(wiphy, |
849 | ftidx: NL80211_EXT_FEATURE_CONTROL_PORT_NO_PREAUTH); |
850 | wiphy_ext_feature_set(wiphy, |
851 | ftidx: NL80211_EXT_FEATURE_CONTROL_PORT_OVER_NL80211_TX_STATUS); |
852 | wiphy_ext_feature_set(wiphy, |
853 | ftidx: NL80211_EXT_FEATURE_SCAN_FREQ_KHZ); |
854 | wiphy_ext_feature_set(wiphy, |
855 | ftidx: NL80211_EXT_FEATURE_POWERED_ADDR_CHANGE); |
856 | |
857 | if (!ops->hw_scan) { |
858 | wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | |
859 | NL80211_FEATURE_AP_SCAN; |
860 | /* |
861 | * if the driver behaves correctly using the probe request |
862 | * (template) from mac80211, then both of these should be |
863 | * supported even with hw scan - but let drivers opt in. |
864 | */ |
865 | wiphy_ext_feature_set(wiphy, |
866 | ftidx: NL80211_EXT_FEATURE_SCAN_RANDOM_SN); |
867 | wiphy_ext_feature_set(wiphy, |
868 | ftidx: NL80211_EXT_FEATURE_SCAN_MIN_PREQ_CONTENT); |
869 | } |
870 | |
871 | if (!ops->set_key) { |
872 | wiphy->flags |= WIPHY_FLAG_IBSS_RSN; |
873 | wiphy_ext_feature_set(wiphy, |
874 | ftidx: NL80211_EXT_FEATURE_SPP_AMSDU_SUPPORT); |
875 | } |
876 | |
877 | wiphy_ext_feature_set(wiphy, ftidx: NL80211_EXT_FEATURE_TXQS); |
878 | wiphy_ext_feature_set(wiphy, ftidx: NL80211_EXT_FEATURE_RRM); |
879 | |
880 | wiphy->bss_priv_size = sizeof(struct ieee80211_bss); |
881 | |
882 | local = wiphy_priv(wiphy); |
883 | |
884 | if (sta_info_init(local)) |
885 | goto err_free; |
886 | |
887 | local->hw.wiphy = wiphy; |
888 | |
889 | local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); |
890 | |
891 | local->ops = ops; |
892 | local->emulate_chanctx = emulate_chanctx; |
893 | |
894 | if (emulate_chanctx) |
895 | ieee80211_hw_set(&local->hw, CHANCTX_STA_CSA); |
896 | |
897 | /* |
898 | * We need a bit of data queued to build aggregates properly, so |
899 | * instruct the TCP stack to allow more than a single ms of data |
900 | * to be queued in the stack. The value is a bit-shift of 1 |
901 | * second, so 7 is ~8ms of queued data. Only affects local TCP |
902 | * sockets. |
903 | * This is the default, anyhow - drivers may need to override it |
904 | * for local reasons (longer buffers, longer completion time, or |
905 | * similar). |
906 | */ |
907 | local->hw.tx_sk_pacing_shift = 7; |
908 | |
909 | /* set up some defaults */ |
910 | local->hw.queues = 1; |
911 | local->hw.max_rates = 1; |
912 | local->hw.max_report_rates = 0; |
913 | local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; |
914 | local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF_HT; |
915 | local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; |
916 | local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; |
917 | local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; |
918 | local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | |
919 | IEEE80211_RADIOTAP_MCS_HAVE_GI | |
920 | IEEE80211_RADIOTAP_MCS_HAVE_BW; |
921 | local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | |
922 | IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; |
923 | local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; |
924 | local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; |
925 | local->hw.max_mtu = IEEE80211_MAX_DATA_LEN; |
926 | local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; |
927 | wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; |
928 | wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; |
929 | |
930 | local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF; |
931 | |
932 | wiphy->extended_capabilities = local->ext_capa; |
933 | wiphy->extended_capabilities_mask = local->ext_capa; |
934 | wiphy->extended_capabilities_len = |
935 | ARRAY_SIZE(local->ext_capa); |
936 | |
937 | INIT_LIST_HEAD(list: &local->interfaces); |
938 | INIT_LIST_HEAD(list: &local->mon_list); |
939 | |
940 | __hw_addr_init(list: &local->mc_list); |
941 | |
942 | mutex_init(&local->iflist_mtx); |
943 | spin_lock_init(&local->filter_lock); |
944 | spin_lock_init(&local->rx_path_lock); |
945 | spin_lock_init(&local->queue_stop_reason_lock); |
946 | |
947 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { |
948 | INIT_LIST_HEAD(list: &local->active_txqs[i]); |
949 | spin_lock_init(&local->active_txq_lock[i]); |
950 | local->aql_txq_limit_low[i] = IEEE80211_DEFAULT_AQL_TXQ_LIMIT_L; |
951 | local->aql_txq_limit_high[i] = |
952 | IEEE80211_DEFAULT_AQL_TXQ_LIMIT_H; |
953 | atomic_set(v: &local->aql_ac_pending_airtime[i], i: 0); |
954 | } |
955 | |
956 | local->airtime_flags = AIRTIME_USE_TX | AIRTIME_USE_RX; |
957 | local->aql_threshold = IEEE80211_AQL_THRESHOLD; |
958 | atomic_set(v: &local->aql_total_pending_airtime, i: 0); |
959 | |
960 | spin_lock_init(&local->handle_wake_tx_queue_lock); |
961 | |
962 | INIT_LIST_HEAD(list: &local->chanctx_list); |
963 | |
964 | wiphy_delayed_work_init(dwork: &local->scan_work, func: ieee80211_scan_work); |
965 | |
966 | INIT_WORK(&local->restart_work, ieee80211_restart_work); |
967 | |
968 | wiphy_work_init(work: &local->radar_detected_work, |
969 | func: ieee80211_dfs_radar_detected_work); |
970 | |
971 | wiphy_work_init(work: &local->reconfig_filter, func: ieee80211_reconfig_filter); |
972 | |
973 | wiphy_work_init(work: &local->dynamic_ps_enable_work, |
974 | func: ieee80211_dynamic_ps_enable_work); |
975 | wiphy_work_init(work: &local->dynamic_ps_disable_work, |
976 | func: ieee80211_dynamic_ps_disable_work); |
977 | timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0); |
978 | |
979 | wiphy_work_init(work: &local->sched_scan_stopped_work, |
980 | func: ieee80211_sched_scan_stopped_work); |
981 | |
982 | spin_lock_init(&local->ack_status_lock); |
983 | idr_init(idr: &local->ack_status_frames); |
984 | |
985 | for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { |
986 | skb_queue_head_init(list: &local->pending[i]); |
987 | atomic_set(v: &local->agg_queue_stop[i], i: 0); |
988 | } |
989 | tasklet_setup(t: &local->tx_pending_tasklet, callback: ieee80211_tx_pending); |
990 | tasklet_setup(t: &local->wake_txqs_tasklet, callback: ieee80211_wake_txqs); |
991 | tasklet_setup(t: &local->tasklet, callback: ieee80211_tasklet_handler); |
992 | |
993 | skb_queue_head_init(list: &local->skb_queue); |
994 | skb_queue_head_init(list: &local->skb_queue_unreliable); |
995 | |
996 | ieee80211_alloc_led_names(local); |
997 | |
998 | ieee80211_roc_setup(local); |
999 | |
1000 | local->hw.radiotap_timestamp.units_pos = -1; |
1001 | local->hw.radiotap_timestamp.accuracy = -1; |
1002 | |
1003 | return &local->hw; |
1004 | err_free: |
1005 | wiphy_free(wiphy); |
1006 | return NULL; |
1007 | } |
1008 | EXPORT_SYMBOL(ieee80211_alloc_hw_nm); |
1009 | |
1010 | static int ieee80211_init_cipher_suites(struct ieee80211_local *local) |
1011 | { |
1012 | bool have_wep = !fips_enabled; /* FIPS does not permit the use of RC4 */ |
1013 | bool have_mfp = ieee80211_hw_check(&local->hw, MFP_CAPABLE); |
1014 | int r = 0, w = 0; |
1015 | u32 *suites; |
1016 | static const u32 cipher_suites[] = { |
1017 | /* keep WEP first, it may be removed below */ |
1018 | WLAN_CIPHER_SUITE_WEP40, |
1019 | WLAN_CIPHER_SUITE_WEP104, |
1020 | WLAN_CIPHER_SUITE_TKIP, |
1021 | WLAN_CIPHER_SUITE_CCMP, |
1022 | WLAN_CIPHER_SUITE_CCMP_256, |
1023 | WLAN_CIPHER_SUITE_GCMP, |
1024 | WLAN_CIPHER_SUITE_GCMP_256, |
1025 | |
1026 | /* keep last -- depends on hw flags! */ |
1027 | WLAN_CIPHER_SUITE_AES_CMAC, |
1028 | WLAN_CIPHER_SUITE_BIP_CMAC_256, |
1029 | WLAN_CIPHER_SUITE_BIP_GMAC_128, |
1030 | WLAN_CIPHER_SUITE_BIP_GMAC_256, |
1031 | }; |
1032 | |
1033 | if (ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL) || |
1034 | local->hw.wiphy->cipher_suites) { |
1035 | /* If the driver advertises, or doesn't support SW crypto, |
1036 | * we only need to remove WEP if necessary. |
1037 | */ |
1038 | if (have_wep) |
1039 | return 0; |
1040 | |
1041 | /* well if it has _no_ ciphers ... fine */ |
1042 | if (!local->hw.wiphy->n_cipher_suites) |
1043 | return 0; |
1044 | |
1045 | /* Driver provides cipher suites, but we need to exclude WEP */ |
1046 | suites = kmemdup(p: local->hw.wiphy->cipher_suites, |
1047 | size: sizeof(u32) * local->hw.wiphy->n_cipher_suites, |
1048 | GFP_KERNEL); |
1049 | if (!suites) |
1050 | return -ENOMEM; |
1051 | |
1052 | for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { |
1053 | u32 suite = local->hw.wiphy->cipher_suites[r]; |
1054 | |
1055 | if (suite == WLAN_CIPHER_SUITE_WEP40 || |
1056 | suite == WLAN_CIPHER_SUITE_WEP104) |
1057 | continue; |
1058 | suites[w++] = suite; |
1059 | } |
1060 | } else { |
1061 | /* assign the (software supported and perhaps offloaded) |
1062 | * cipher suites |
1063 | */ |
1064 | local->hw.wiphy->cipher_suites = cipher_suites; |
1065 | local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); |
1066 | |
1067 | if (!have_mfp) |
1068 | local->hw.wiphy->n_cipher_suites -= 4; |
1069 | |
1070 | if (!have_wep) { |
1071 | local->hw.wiphy->cipher_suites += 2; |
1072 | local->hw.wiphy->n_cipher_suites -= 2; |
1073 | } |
1074 | |
1075 | /* not dynamically allocated, so just return */ |
1076 | return 0; |
1077 | } |
1078 | |
1079 | local->hw.wiphy->cipher_suites = suites; |
1080 | local->hw.wiphy->n_cipher_suites = w; |
1081 | local->wiphy_ciphers_allocated = true; |
1082 | |
1083 | return 0; |
1084 | } |
1085 | |
1086 | int ieee80211_register_hw(struct ieee80211_hw *hw) |
1087 | { |
1088 | struct ieee80211_local *local = hw_to_local(hw); |
1089 | int result, i; |
1090 | enum nl80211_band band; |
1091 | int channels, max_bitrates; |
1092 | bool supp_ht, supp_vht, supp_he, supp_eht; |
1093 | struct cfg80211_chan_def dflt_chandef = {}; |
1094 | |
1095 | if (ieee80211_hw_check(hw, QUEUE_CONTROL) && |
1096 | (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || |
1097 | local->hw.offchannel_tx_hw_queue >= local->hw.queues)) |
1098 | return -EINVAL; |
1099 | |
1100 | if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) && |
1101 | (!local->ops->tdls_channel_switch || |
1102 | !local->ops->tdls_cancel_channel_switch || |
1103 | !local->ops->tdls_recv_channel_switch)) |
1104 | return -EOPNOTSUPP; |
1105 | |
1106 | if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_TX_FRAG) && |
1107 | !local->ops->set_frag_threshold)) |
1108 | return -EINVAL; |
1109 | |
1110 | if (WARN_ON(local->hw.wiphy->interface_modes & |
1111 | BIT(NL80211_IFTYPE_NAN) && |
1112 | (!local->ops->start_nan || !local->ops->stop_nan))) |
1113 | return -EINVAL; |
1114 | |
1115 | if (hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) { |
1116 | /* |
1117 | * For drivers capable of doing MLO, assume modern driver |
1118 | * or firmware facilities, so software doesn't have to do |
1119 | * as much, e.g. monitoring beacons would be hard if we |
1120 | * might not even know which link is active at which time. |
1121 | */ |
1122 | if (WARN_ON(local->emulate_chanctx)) |
1123 | return -EINVAL; |
1124 | |
1125 | if (WARN_ON(!local->ops->link_info_changed)) |
1126 | return -EINVAL; |
1127 | |
1128 | if (WARN_ON(!ieee80211_hw_check(hw, HAS_RATE_CONTROL))) |
1129 | return -EINVAL; |
1130 | |
1131 | if (WARN_ON(!ieee80211_hw_check(hw, AMPDU_AGGREGATION))) |
1132 | return -EINVAL; |
1133 | |
1134 | if (WARN_ON(ieee80211_hw_check(hw, HOST_BROADCAST_PS_BUFFERING))) |
1135 | return -EINVAL; |
1136 | |
1137 | if (WARN_ON(ieee80211_hw_check(hw, SUPPORTS_PS) && |
1138 | (!ieee80211_hw_check(hw, SUPPORTS_DYNAMIC_PS) || |
1139 | ieee80211_hw_check(hw, PS_NULLFUNC_STACK)))) |
1140 | return -EINVAL; |
1141 | |
1142 | if (WARN_ON(!ieee80211_hw_check(hw, MFP_CAPABLE))) |
1143 | return -EINVAL; |
1144 | |
1145 | if (WARN_ON(!ieee80211_hw_check(hw, CONNECTION_MONITOR))) |
1146 | return -EINVAL; |
1147 | |
1148 | if (WARN_ON(ieee80211_hw_check(hw, NEED_DTIM_BEFORE_ASSOC))) |
1149 | return -EINVAL; |
1150 | |
1151 | if (WARN_ON(ieee80211_hw_check(hw, TIMING_BEACON_ONLY))) |
1152 | return -EINVAL; |
1153 | |
1154 | if (WARN_ON(!ieee80211_hw_check(hw, AP_LINK_PS))) |
1155 | return -EINVAL; |
1156 | |
1157 | if (WARN_ON(ieee80211_hw_check(hw, DEAUTH_NEED_MGD_TX_PREP))) |
1158 | return -EINVAL; |
1159 | } |
1160 | |
1161 | #ifdef CONFIG_PM |
1162 | if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) |
1163 | return -EINVAL; |
1164 | #endif |
1165 | |
1166 | if (local->emulate_chanctx) { |
1167 | for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { |
1168 | const struct ieee80211_iface_combination *comb; |
1169 | |
1170 | comb = &local->hw.wiphy->iface_combinations[i]; |
1171 | |
1172 | if (comb->num_different_channels > 1) |
1173 | return -EINVAL; |
1174 | } |
1175 | } else { |
1176 | /* DFS is not supported with multi-channel combinations yet */ |
1177 | for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { |
1178 | const struct ieee80211_iface_combination *comb; |
1179 | |
1180 | comb = &local->hw.wiphy->iface_combinations[i]; |
1181 | |
1182 | if (comb->radar_detect_widths && |
1183 | comb->num_different_channels > 1) |
1184 | return -EINVAL; |
1185 | } |
1186 | } |
1187 | |
1188 | /* Only HW csum features are currently compatible with mac80211 */ |
1189 | if (WARN_ON(hw->netdev_features & ~MAC80211_SUPPORTED_FEATURES)) |
1190 | return -EINVAL; |
1191 | |
1192 | if (hw->max_report_rates == 0) |
1193 | hw->max_report_rates = hw->max_rates; |
1194 | |
1195 | local->rx_chains = 1; |
1196 | |
1197 | /* |
1198 | * generic code guarantees at least one band, |
1199 | * set this very early because much code assumes |
1200 | * that hw.conf.channel is assigned |
1201 | */ |
1202 | channels = 0; |
1203 | max_bitrates = 0; |
1204 | supp_ht = false; |
1205 | supp_vht = false; |
1206 | supp_he = false; |
1207 | supp_eht = false; |
1208 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
1209 | const struct ieee80211_sband_iftype_data *iftd; |
1210 | struct ieee80211_supported_band *sband; |
1211 | |
1212 | sband = local->hw.wiphy->bands[band]; |
1213 | if (!sband) |
1214 | continue; |
1215 | |
1216 | if (!dflt_chandef.chan) { |
1217 | /* |
1218 | * Assign the first enabled channel to dflt_chandef |
1219 | * from the list of channels |
1220 | */ |
1221 | for (i = 0; i < sband->n_channels; i++) |
1222 | if (!(sband->channels[i].flags & |
1223 | IEEE80211_CHAN_DISABLED)) |
1224 | break; |
1225 | /* if none found then use the first anyway */ |
1226 | if (i == sband->n_channels) |
1227 | i = 0; |
1228 | cfg80211_chandef_create(chandef: &dflt_chandef, |
1229 | channel: &sband->channels[i], |
1230 | chantype: NL80211_CHAN_NO_HT); |
1231 | /* init channel we're on */ |
1232 | local->monitor_chanreq.oper = dflt_chandef; |
1233 | if (local->emulate_chanctx) { |
1234 | local->dflt_chandef = dflt_chandef; |
1235 | local->hw.conf.chandef = dflt_chandef; |
1236 | } |
1237 | } |
1238 | |
1239 | channels += sband->n_channels; |
1240 | |
1241 | /* |
1242 | * Due to the way the aggregation code handles this and it |
1243 | * being an HT capability, we can't really support delayed |
1244 | * BA in MLO (yet). |
1245 | */ |
1246 | if (WARN_ON(sband->ht_cap.ht_supported && |
1247 | (sband->ht_cap.cap & IEEE80211_HT_CAP_DELAY_BA) && |
1248 | hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO)) |
1249 | return -EINVAL; |
1250 | |
1251 | if (max_bitrates < sband->n_bitrates) |
1252 | max_bitrates = sband->n_bitrates; |
1253 | supp_ht = supp_ht || sband->ht_cap.ht_supported; |
1254 | supp_vht = supp_vht || sband->vht_cap.vht_supported; |
1255 | |
1256 | for_each_sband_iftype_data(sband, i, iftd) { |
1257 | u8 he_40_mhz_cap; |
1258 | |
1259 | supp_he = supp_he || iftd->he_cap.has_he; |
1260 | supp_eht = supp_eht || iftd->eht_cap.has_eht; |
1261 | |
1262 | if (band == NL80211_BAND_2GHZ) |
1263 | he_40_mhz_cap = |
1264 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G; |
1265 | else |
1266 | he_40_mhz_cap = |
1267 | IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G; |
1268 | |
1269 | /* currently no support for HE client where HT has 40 MHz but not HT */ |
1270 | if (iftd->he_cap.has_he && |
1271 | iftd->types_mask & (BIT(NL80211_IFTYPE_STATION) | |
1272 | BIT(NL80211_IFTYPE_P2P_CLIENT)) && |
1273 | sband->ht_cap.ht_supported && |
1274 | sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 && |
1275 | !(iftd->he_cap.he_cap_elem.phy_cap_info[0] & he_40_mhz_cap)) |
1276 | return -EINVAL; |
1277 | } |
1278 | |
1279 | /* HT, VHT, HE require QoS, thus >= 4 queues */ |
1280 | if (WARN_ON(local->hw.queues < IEEE80211_NUM_ACS && |
1281 | (supp_ht || supp_vht || supp_he))) |
1282 | return -EINVAL; |
1283 | |
1284 | /* EHT requires HE support */ |
1285 | if (WARN_ON(supp_eht && !supp_he)) |
1286 | return -EINVAL; |
1287 | |
1288 | if (!sband->ht_cap.ht_supported) |
1289 | continue; |
1290 | |
1291 | /* TODO: consider VHT for RX chains, hopefully it's the same */ |
1292 | local->rx_chains = |
1293 | max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), |
1294 | local->rx_chains); |
1295 | |
1296 | /* no need to mask, SM_PS_DISABLED has all bits set */ |
1297 | sband->ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED << |
1298 | IEEE80211_HT_CAP_SM_PS_SHIFT; |
1299 | } |
1300 | |
1301 | /* if low-level driver supports AP, we also support VLAN. |
1302 | * drivers advertising SW_CRYPTO_CONTROL should enable AP_VLAN |
1303 | * based on their support to transmit SW encrypted packets. |
1304 | */ |
1305 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP) && |
1306 | !ieee80211_hw_check(&local->hw, SW_CRYPTO_CONTROL)) { |
1307 | hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); |
1308 | hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); |
1309 | } |
1310 | |
1311 | /* mac80211 always supports monitor */ |
1312 | hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); |
1313 | hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); |
1314 | |
1315 | /* mac80211 doesn't support more than one IBSS interface right now */ |
1316 | for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { |
1317 | const struct ieee80211_iface_combination *c; |
1318 | int j; |
1319 | |
1320 | c = &hw->wiphy->iface_combinations[i]; |
1321 | |
1322 | for (j = 0; j < c->n_limits; j++) |
1323 | if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && |
1324 | c->limits[j].max > 1) |
1325 | return -EINVAL; |
1326 | } |
1327 | |
1328 | local->int_scan_req = kzalloc(size: sizeof(*local->int_scan_req) + |
1329 | sizeof(void *) * channels, GFP_KERNEL); |
1330 | if (!local->int_scan_req) |
1331 | return -ENOMEM; |
1332 | |
1333 | eth_broadcast_addr(addr: local->int_scan_req->bssid); |
1334 | |
1335 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
1336 | if (!local->hw.wiphy->bands[band]) |
1337 | continue; |
1338 | local->int_scan_req->rates[band] = (u32) -1; |
1339 | } |
1340 | |
1341 | #ifndef CONFIG_MAC80211_MESH |
1342 | /* mesh depends on Kconfig, but drivers should set it if they want */ |
1343 | local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); |
1344 | #endif |
1345 | |
1346 | /* if the underlying driver supports mesh, mac80211 will (at least) |
1347 | * provide routing of mesh authentication frames to userspace */ |
1348 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) |
1349 | local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; |
1350 | |
1351 | /* mac80211 supports control port protocol changing */ |
1352 | local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; |
1353 | |
1354 | if (ieee80211_hw_check(&local->hw, SIGNAL_DBM)) { |
1355 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; |
1356 | } else if (ieee80211_hw_check(&local->hw, SIGNAL_UNSPEC)) { |
1357 | local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; |
1358 | if (hw->max_signal <= 0) { |
1359 | result = -EINVAL; |
1360 | goto fail_workqueue; |
1361 | } |
1362 | } |
1363 | |
1364 | /* Mac80211 and therefore all drivers using SW crypto only |
1365 | * are able to handle PTK rekeys and Extended Key ID. |
1366 | */ |
1367 | if (!local->ops->set_key) { |
1368 | wiphy_ext_feature_set(wiphy: local->hw.wiphy, |
1369 | ftidx: NL80211_EXT_FEATURE_CAN_REPLACE_PTK0); |
1370 | wiphy_ext_feature_set(wiphy: local->hw.wiphy, |
1371 | ftidx: NL80211_EXT_FEATURE_EXT_KEY_ID); |
1372 | } |
1373 | |
1374 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_ADHOC)) |
1375 | wiphy_ext_feature_set(wiphy: local->hw.wiphy, |
1376 | ftidx: NL80211_EXT_FEATURE_DEL_IBSS_STA); |
1377 | |
1378 | /* |
1379 | * Calculate scan IE length -- we need this to alloc |
1380 | * memory and to subtract from the driver limit. It |
1381 | * includes the DS Params, (extended) supported rates, and HT |
1382 | * information -- SSID is the driver's responsibility. |
1383 | */ |
1384 | local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + |
1385 | 3 /* DS Params */; |
1386 | if (supp_ht) |
1387 | local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); |
1388 | |
1389 | if (supp_vht) |
1390 | local->scan_ies_len += |
1391 | 2 + sizeof(struct ieee80211_vht_cap); |
1392 | |
1393 | /* |
1394 | * HE cap element is variable in size - set len to allow max size */ |
1395 | if (supp_he) { |
1396 | local->scan_ies_len += |
1397 | 3 + sizeof(struct ieee80211_he_cap_elem) + |
1398 | sizeof(struct ieee80211_he_mcs_nss_supp) + |
1399 | IEEE80211_HE_PPE_THRES_MAX_LEN; |
1400 | |
1401 | if (supp_eht) |
1402 | local->scan_ies_len += |
1403 | 3 + sizeof(struct ieee80211_eht_cap_elem) + |
1404 | sizeof(struct ieee80211_eht_mcs_nss_supp) + |
1405 | IEEE80211_EHT_PPE_THRES_MAX_LEN; |
1406 | } |
1407 | |
1408 | if (!local->ops->hw_scan) { |
1409 | /* For hw_scan, driver needs to set these up. */ |
1410 | local->hw.wiphy->max_scan_ssids = 4; |
1411 | local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; |
1412 | } |
1413 | |
1414 | /* |
1415 | * If the driver supports any scan IEs, then assume the |
1416 | * limit includes the IEs mac80211 will add, otherwise |
1417 | * leave it at zero and let the driver sort it out; we |
1418 | * still pass our IEs to the driver but userspace will |
1419 | * not be allowed to in that case. |
1420 | */ |
1421 | if (local->hw.wiphy->max_scan_ie_len) |
1422 | local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; |
1423 | |
1424 | result = ieee80211_init_cipher_suites(local); |
1425 | if (result < 0) |
1426 | goto fail_workqueue; |
1427 | |
1428 | if (!local->ops->remain_on_channel) |
1429 | local->hw.wiphy->max_remain_on_channel_duration = 5000; |
1430 | |
1431 | /* mac80211 based drivers don't support internal TDLS setup */ |
1432 | if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) |
1433 | local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; |
1434 | |
1435 | /* mac80211 supports eCSA, if the driver supports STA CSA at all */ |
1436 | if (ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) |
1437 | local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING; |
1438 | |
1439 | /* mac80211 supports multi BSSID, if the driver supports it */ |
1440 | if (ieee80211_hw_check(&local->hw, SUPPORTS_MULTI_BSSID)) { |
1441 | local->hw.wiphy->support_mbssid = true; |
1442 | if (ieee80211_hw_check(&local->hw, |
1443 | SUPPORTS_ONLY_HE_MULTI_BSSID)) |
1444 | local->hw.wiphy->support_only_he_mbssid = true; |
1445 | else |
1446 | local->ext_capa[2] |= |
1447 | WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; |
1448 | } |
1449 | |
1450 | local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CNTDWN_COUNTERS_NUM; |
1451 | |
1452 | /* |
1453 | * We use the number of queues for feature tests (QoS, HT) internally |
1454 | * so restrict them appropriately. |
1455 | */ |
1456 | if (hw->queues > IEEE80211_MAX_QUEUES) |
1457 | hw->queues = IEEE80211_MAX_QUEUES; |
1458 | |
1459 | local->workqueue = |
1460 | alloc_ordered_workqueue("%s" , 0, wiphy_name(local->hw.wiphy)); |
1461 | if (!local->workqueue) { |
1462 | result = -ENOMEM; |
1463 | goto fail_workqueue; |
1464 | } |
1465 | |
1466 | /* |
1467 | * The hardware needs headroom for sending the frame, |
1468 | * and we need some headroom for passing the frame to monitor |
1469 | * interfaces, but never both at the same time. |
1470 | */ |
1471 | local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, |
1472 | IEEE80211_TX_STATUS_HEADROOM); |
1473 | |
1474 | /* |
1475 | * if the driver doesn't specify a max listen interval we |
1476 | * use 5 which should be a safe default |
1477 | */ |
1478 | if (local->hw.max_listen_interval == 0) |
1479 | local->hw.max_listen_interval = 5; |
1480 | |
1481 | local->hw.conf.listen_interval = local->hw.max_listen_interval; |
1482 | |
1483 | local->dynamic_ps_forced_timeout = -1; |
1484 | |
1485 | if (!local->hw.max_nan_de_entries) |
1486 | local->hw.max_nan_de_entries = IEEE80211_MAX_NAN_INSTANCE_ID; |
1487 | |
1488 | if (!local->hw.weight_multiplier) |
1489 | local->hw.weight_multiplier = 1; |
1490 | |
1491 | ieee80211_wep_init(local); |
1492 | |
1493 | local->hw.conf.flags = IEEE80211_CONF_IDLE; |
1494 | |
1495 | ieee80211_led_init(local); |
1496 | |
1497 | result = ieee80211_txq_setup_flows(local); |
1498 | if (result) |
1499 | goto fail_flows; |
1500 | |
1501 | rtnl_lock(); |
1502 | result = ieee80211_init_rate_ctrl_alg(local, |
1503 | name: hw->rate_control_algorithm); |
1504 | rtnl_unlock(); |
1505 | if (result < 0) { |
1506 | wiphy_debug(local->hw.wiphy, |
1507 | "Failed to initialize rate control algorithm\n" ); |
1508 | goto fail_rate; |
1509 | } |
1510 | |
1511 | if (local->rate_ctrl) { |
1512 | clear_bit(nr: IEEE80211_HW_SUPPORTS_VHT_EXT_NSS_BW, addr: hw->flags); |
1513 | if (local->rate_ctrl->ops->capa & RATE_CTRL_CAPA_VHT_EXT_NSS_BW) |
1514 | ieee80211_hw_set(hw, SUPPORTS_VHT_EXT_NSS_BW); |
1515 | } |
1516 | |
1517 | /* |
1518 | * If the VHT capabilities don't have IEEE80211_VHT_EXT_NSS_BW_CAPABLE, |
1519 | * or have it when we don't, copy the sband structure and set/clear it. |
1520 | * This is necessary because rate scaling algorithms could be switched |
1521 | * and have different support values. |
1522 | * Print a message so that in the common case the reallocation can be |
1523 | * avoided. |
1524 | */ |
1525 | BUILD_BUG_ON(NUM_NL80211_BANDS > 8 * sizeof(local->sband_allocated)); |
1526 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
1527 | struct ieee80211_supported_band *sband; |
1528 | bool local_cap, ie_cap; |
1529 | |
1530 | local_cap = ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW); |
1531 | |
1532 | sband = local->hw.wiphy->bands[band]; |
1533 | if (!sband || !sband->vht_cap.vht_supported) |
1534 | continue; |
1535 | |
1536 | ie_cap = !!(sband->vht_cap.vht_mcs.tx_highest & |
1537 | cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE)); |
1538 | |
1539 | if (local_cap == ie_cap) |
1540 | continue; |
1541 | |
1542 | sband = kmemdup(p: sband, size: sizeof(*sband), GFP_KERNEL); |
1543 | if (!sband) { |
1544 | result = -ENOMEM; |
1545 | goto fail_rate; |
1546 | } |
1547 | |
1548 | wiphy_dbg(hw->wiphy, "copying sband (band %d) due to VHT EXT NSS BW flag\n" , |
1549 | band); |
1550 | |
1551 | sband->vht_cap.vht_mcs.tx_highest ^= |
1552 | cpu_to_le16(IEEE80211_VHT_EXT_NSS_BW_CAPABLE); |
1553 | |
1554 | local->hw.wiphy->bands[band] = sband; |
1555 | local->sband_allocated |= BIT(band); |
1556 | } |
1557 | |
1558 | result = wiphy_register(wiphy: local->hw.wiphy); |
1559 | if (result < 0) |
1560 | goto fail_wiphy_register; |
1561 | |
1562 | debugfs_hw_add(local); |
1563 | rate_control_add_debugfs(local); |
1564 | |
1565 | ieee80211_check_wbrf_support(local); |
1566 | |
1567 | rtnl_lock(); |
1568 | wiphy_lock(wiphy: hw->wiphy); |
1569 | |
1570 | /* add one default STA interface if supported */ |
1571 | if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION) && |
1572 | !ieee80211_hw_check(hw, NO_AUTO_VIF)) { |
1573 | struct vif_params params = {0}; |
1574 | |
1575 | result = ieee80211_if_add(local, name: "wlan%d" , NET_NAME_ENUM, NULL, |
1576 | type: NL80211_IFTYPE_STATION, params: ¶ms); |
1577 | if (result) |
1578 | wiphy_warn(local->hw.wiphy, |
1579 | "Failed to add default virtual iface\n" ); |
1580 | } |
1581 | |
1582 | wiphy_unlock(wiphy: hw->wiphy); |
1583 | rtnl_unlock(); |
1584 | |
1585 | #ifdef CONFIG_INET |
1586 | local->ifa_notifier.notifier_call = ieee80211_ifa_changed; |
1587 | result = register_inetaddr_notifier(nb: &local->ifa_notifier); |
1588 | if (result) |
1589 | goto fail_ifa; |
1590 | #endif |
1591 | |
1592 | #if IS_ENABLED(CONFIG_IPV6) |
1593 | local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; |
1594 | result = register_inet6addr_notifier(nb: &local->ifa6_notifier); |
1595 | if (result) |
1596 | goto fail_ifa6; |
1597 | #endif |
1598 | |
1599 | return 0; |
1600 | |
1601 | #if IS_ENABLED(CONFIG_IPV6) |
1602 | fail_ifa6: |
1603 | #ifdef CONFIG_INET |
1604 | unregister_inetaddr_notifier(nb: &local->ifa_notifier); |
1605 | #endif |
1606 | #endif |
1607 | #if defined(CONFIG_INET) || defined(CONFIG_IPV6) |
1608 | fail_ifa: |
1609 | #endif |
1610 | wiphy_unregister(wiphy: local->hw.wiphy); |
1611 | fail_wiphy_register: |
1612 | rtnl_lock(); |
1613 | rate_control_deinitialize(local); |
1614 | ieee80211_remove_interfaces(local); |
1615 | rtnl_unlock(); |
1616 | fail_rate: |
1617 | ieee80211_txq_teardown_flows(local); |
1618 | fail_flows: |
1619 | ieee80211_led_exit(local); |
1620 | destroy_workqueue(wq: local->workqueue); |
1621 | fail_workqueue: |
1622 | if (local->wiphy_ciphers_allocated) { |
1623 | kfree(objp: local->hw.wiphy->cipher_suites); |
1624 | local->wiphy_ciphers_allocated = false; |
1625 | } |
1626 | kfree(objp: local->int_scan_req); |
1627 | return result; |
1628 | } |
1629 | EXPORT_SYMBOL(ieee80211_register_hw); |
1630 | |
1631 | void ieee80211_unregister_hw(struct ieee80211_hw *hw) |
1632 | { |
1633 | struct ieee80211_local *local = hw_to_local(hw); |
1634 | |
1635 | tasklet_kill(t: &local->tx_pending_tasklet); |
1636 | tasklet_kill(t: &local->tasklet); |
1637 | |
1638 | #ifdef CONFIG_INET |
1639 | unregister_inetaddr_notifier(nb: &local->ifa_notifier); |
1640 | #endif |
1641 | #if IS_ENABLED(CONFIG_IPV6) |
1642 | unregister_inet6addr_notifier(nb: &local->ifa6_notifier); |
1643 | #endif |
1644 | |
1645 | rtnl_lock(); |
1646 | |
1647 | /* |
1648 | * At this point, interface list manipulations are fine |
1649 | * because the driver cannot be handing us frames any |
1650 | * more and the tasklet is killed. |
1651 | */ |
1652 | ieee80211_remove_interfaces(local); |
1653 | |
1654 | ieee80211_txq_teardown_flows(local); |
1655 | |
1656 | wiphy_lock(wiphy: local->hw.wiphy); |
1657 | wiphy_delayed_work_cancel(wiphy: local->hw.wiphy, dwork: &local->roc_work); |
1658 | wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->reconfig_filter); |
1659 | wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->sched_scan_stopped_work); |
1660 | wiphy_work_cancel(wiphy: local->hw.wiphy, work: &local->radar_detected_work); |
1661 | wiphy_unlock(wiphy: local->hw.wiphy); |
1662 | rtnl_unlock(); |
1663 | |
1664 | cancel_work_sync(work: &local->restart_work); |
1665 | |
1666 | ieee80211_clear_tx_pending(local); |
1667 | rate_control_deinitialize(local); |
1668 | |
1669 | if (skb_queue_len(list_: &local->skb_queue) || |
1670 | skb_queue_len(list_: &local->skb_queue_unreliable)) |
1671 | wiphy_warn(local->hw.wiphy, "skb_queue not empty\n" ); |
1672 | skb_queue_purge(list: &local->skb_queue); |
1673 | skb_queue_purge(list: &local->skb_queue_unreliable); |
1674 | |
1675 | wiphy_unregister(wiphy: local->hw.wiphy); |
1676 | destroy_workqueue(wq: local->workqueue); |
1677 | ieee80211_led_exit(local); |
1678 | kfree(objp: local->int_scan_req); |
1679 | } |
1680 | EXPORT_SYMBOL(ieee80211_unregister_hw); |
1681 | |
1682 | static int ieee80211_free_ack_frame(int id, void *p, void *data) |
1683 | { |
1684 | WARN_ONCE(1, "Have pending ack frames!\n" ); |
1685 | kfree_skb(skb: p); |
1686 | return 0; |
1687 | } |
1688 | |
1689 | void ieee80211_free_hw(struct ieee80211_hw *hw) |
1690 | { |
1691 | struct ieee80211_local *local = hw_to_local(hw); |
1692 | enum nl80211_band band; |
1693 | |
1694 | mutex_destroy(lock: &local->iflist_mtx); |
1695 | |
1696 | if (local->wiphy_ciphers_allocated) { |
1697 | kfree(objp: local->hw.wiphy->cipher_suites); |
1698 | local->wiphy_ciphers_allocated = false; |
1699 | } |
1700 | |
1701 | idr_for_each(&local->ack_status_frames, |
1702 | fn: ieee80211_free_ack_frame, NULL); |
1703 | idr_destroy(&local->ack_status_frames); |
1704 | |
1705 | sta_info_stop(local); |
1706 | |
1707 | ieee80211_free_led_names(local); |
1708 | |
1709 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
1710 | if (!(local->sband_allocated & BIT(band))) |
1711 | continue; |
1712 | kfree(objp: local->hw.wiphy->bands[band]); |
1713 | } |
1714 | |
1715 | wiphy_free(wiphy: local->hw.wiphy); |
1716 | } |
1717 | EXPORT_SYMBOL(ieee80211_free_hw); |
1718 | |
1719 | static const char * const drop_reasons_monitor[] = { |
1720 | #define V(x) #x, |
1721 | [0] = "RX_DROP_MONITOR" , |
1722 | MAC80211_DROP_REASONS_MONITOR(V) |
1723 | }; |
1724 | |
1725 | static struct drop_reason_list drop_reason_list_monitor = { |
1726 | .reasons = drop_reasons_monitor, |
1727 | .n_reasons = ARRAY_SIZE(drop_reasons_monitor), |
1728 | }; |
1729 | |
1730 | static const char * const drop_reasons_unusable[] = { |
1731 | [0] = "RX_DROP_UNUSABLE" , |
1732 | MAC80211_DROP_REASONS_UNUSABLE(V) |
1733 | #undef V |
1734 | }; |
1735 | |
1736 | static struct drop_reason_list drop_reason_list_unusable = { |
1737 | .reasons = drop_reasons_unusable, |
1738 | .n_reasons = ARRAY_SIZE(drop_reasons_unusable), |
1739 | }; |
1740 | |
1741 | static int __init ieee80211_init(void) |
1742 | { |
1743 | struct sk_buff *skb; |
1744 | int ret; |
1745 | |
1746 | BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); |
1747 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + |
1748 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); |
1749 | |
1750 | ret = rc80211_minstrel_init(); |
1751 | if (ret) |
1752 | return ret; |
1753 | |
1754 | ret = ieee80211_iface_init(); |
1755 | if (ret) |
1756 | goto err_netdev; |
1757 | |
1758 | drop_reasons_register_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, |
1759 | list: &drop_reason_list_monitor); |
1760 | drop_reasons_register_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, |
1761 | list: &drop_reason_list_unusable); |
1762 | |
1763 | return 0; |
1764 | err_netdev: |
1765 | rc80211_minstrel_exit(); |
1766 | |
1767 | return ret; |
1768 | } |
1769 | |
1770 | static void __exit ieee80211_exit(void) |
1771 | { |
1772 | rc80211_minstrel_exit(); |
1773 | |
1774 | ieee80211s_stop(); |
1775 | |
1776 | ieee80211_iface_exit(); |
1777 | |
1778 | drop_reasons_unregister_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR); |
1779 | drop_reasons_unregister_subsys(subsys: SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE); |
1780 | |
1781 | rcu_barrier(); |
1782 | } |
1783 | |
1784 | |
1785 | subsys_initcall(ieee80211_init); |
1786 | module_exit(ieee80211_exit); |
1787 | |
1788 | MODULE_DESCRIPTION("IEEE 802.11 subsystem" ); |
1789 | MODULE_LICENSE("GPL" ); |
1790 | |