main.c 34.1 KB
Newer Older
1
2
3
4
/*
 * Copyright 2002-2005, Instant802 Networks, Inc.
 * Copyright 2005-2006, Devicescape Software, Inc.
 * Copyright 2006-2007	Jiri Benc <jbenc@suse.cz>
5
 * Copyright 2013-2014  Intel Mobile Communications GmbH
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <net/mac80211.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/rtnetlink.h>
#include <linux/bitmap.h>
23
#include <linux/pm_qos.h>
24
#include <linux/inetdevice.h>
25
#include <net/net_namespace.h>
26
#include <net/cfg80211.h>
27
#include <net/addrconf.h>
28
29

#include "ieee80211_i.h"
30
#include "driver-ops.h"
Johannes Berg's avatar
Johannes Berg committed
31
#include "rate.h"
32
#include "mesh.h"
33
#include "wep.h"
Johannes Berg's avatar
Johannes Berg committed
34
#include "led.h"
35
#include "cfg.h"
36
#include "debugfs.h"
37

38
void ieee80211_configure_filter(struct ieee80211_local *local)
39
{
40
	u64 mc;
41
42
43
	unsigned int changed_flags;
	unsigned int new_flags = 0;

44
	if (atomic_read(&local->iff_promiscs))
45
46
		new_flags |= FIF_PROMISC_IN_BSS;

47
	if (atomic_read(&local->iff_allmultis))
48
49
		new_flags |= FIF_ALLMULTI;

50
51
	if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) ||
	    test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning))
52
53
		new_flags |= FIF_BCN_PRBRESP_PROMISC;

54
55
56
	if (local->fif_probe_req || local->probe_req_reg)
		new_flags |= FIF_PROBE_REQ;

57
58
59
60
61
62
63
64
65
66
67
	if (local->fif_fcsfail)
		new_flags |= FIF_FCSFAIL;

	if (local->fif_plcpfail)
		new_flags |= FIF_PLCPFAIL;

	if (local->fif_control)
		new_flags |= FIF_CONTROL;

	if (local->fif_other_bss)
		new_flags |= FIF_OTHER_BSS;
68

69
70
71
	if (local->fif_pspoll)
		new_flags |= FIF_PSPOLL;

72
	spin_lock_bh(&local->filter_lock);
73
74
	changed_flags = local->filter_flags ^ new_flags;

75
	mc = drv_prepare_multicast(local, &local->mc_list);
76
77
	spin_unlock_bh(&local->filter_lock);

78
79
80
	/* be a bit nasty */
	new_flags |= (1<<31);

81
	drv_configure_filter(local, changed_flags, &new_flags, mc);
82
83
84
85
86
87

	WARN_ON(new_flags & (1<<31));

	local->filter_flags = new_flags & ~(1<<31);
}

88
89
90
91
92
93
94
95
static void ieee80211_reconfig_filter(struct work_struct *work)
{
	struct ieee80211_local *local =
		container_of(work, struct ieee80211_local, reconfig_filter);

	ieee80211_configure_filter(local);
}

Johannes Berg's avatar
Johannes Berg committed
96
static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
97
{
98
	struct ieee80211_sub_if_data *sdata;
99
	struct cfg80211_chan_def chandef = {};
Johannes Berg's avatar
Johannes Berg committed
100
	u32 changed = 0;
101
	int power;
102
	u32 offchannel_flag;
103

104
	offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
105

106
107
	if (local->scan_chandef.chan) {
		chandef = local->scan_chandef;
108
	} else if (local->tmp_channel) {
109
110
111
112
113
114
115
116
117
118
119
120
		chandef.chan = local->tmp_channel;
		chandef.width = NL80211_CHAN_WIDTH_20_NOHT;
		chandef.center_freq1 = chandef.chan->center_freq;
	} else
		chandef = local->_oper_chandef;

	WARN(!cfg80211_chandef_valid(&chandef),
	     "control:%d MHz width:%d center: %d/%d MHz",
	     chandef.chan->center_freq, chandef.width,
	     chandef.center_freq1, chandef.center_freq2);

	if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef))
121
122
123
124
		local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL;
	else
		local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL;

125
	offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL;
126

127
128
129
130
	if (offchannel_flag ||
	    !cfg80211_chandef_identical(&local->hw.conf.chandef,
					&local->_oper_chandef)) {
		local->hw.conf.chandef = chandef;
131
132
		changed |= IEEE80211_CONF_CHANGE_CHANNEL;
	}
133

134
135
136
137
138
139
140
141
142
143
144
145
	if (!conf_is_ht(&local->hw.conf)) {
		/*
		 * mac80211.h documents that this is only valid
		 * when the channel is set to an HT type, and
		 * that otherwise STATIC is used.
		 */
		local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC;
	} else if (local->hw.conf.smps_mode != local->smps_mode) {
		local->hw.conf.smps_mode = local->smps_mode;
		changed |= IEEE80211_CONF_CHANGE_SMPS;
	}

146
	power = ieee80211_chandef_max_power(&chandef);
147

148
149
150
151
	rcu_read_lock();
	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
		if (!rcu_access_pointer(sdata->vif.chanctx_conf))
			continue;
152
153
		if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
			continue;
154
155
156
		power = min(power, sdata->vif.bss_conf.txpower);
	}
	rcu_read_unlock();
157

158
159
160
161
	if (local->hw.conf.power_level != power) {
		changed |= IEEE80211_CONF_CHANGE_POWER;
		local->hw.conf.power_level = power;
	}
162

Johannes Berg's avatar
Johannes Berg committed
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
	return changed;
}

int ieee80211_hw_config(struct ieee80211_local *local, u32 changed)
{
	int ret = 0;

	might_sleep();

	if (!local->use_chanctx)
		changed |= ieee80211_hw_conf_chan(local);
	else
		changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL |
			     IEEE80211_CONF_CHANGE_POWER);

178
	if (changed && local->open_count) {
179
		ret = drv_config(local, changed);
180
		/*
181
		 * Goal:
182
183
		 * HW reconfiguration should never fail, the driver has told
		 * us what it can support so it should live up to that promise.
184
185
186
187
188
189
190
191
192
		 *
		 * Current status:
		 * rfkill is not integrated with mac80211 and a
		 * configuration command can thus fail if hardware rfkill
		 * is enabled
		 *
		 * FIXME: integrate rfkill with mac80211 and then add this
		 * WARN_ON() back
		 *
193
		 */
194
		/* WARN_ON(ret); */
195
	}
196

197
198
	return ret;
}
199

200
201
void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
				      u32 changed)
202
{
203
204
	struct ieee80211_local *local = sdata->local;

205
	if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
206
207
		return;

Johannes Berg's avatar
Johannes Berg committed
208
	drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed);
209
210
}

211
u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata)
212
{
213
214
215
	sdata->vif.bss_conf.use_cts_prot = false;
	sdata->vif.bss_conf.use_short_preamble = false;
	sdata->vif.bss_conf.use_short_slot = false;
216
217
218
	return BSS_CHANGED_ERP_CTS_PROT |
	       BSS_CHANGED_ERP_PREAMBLE |
	       BSS_CHANGED_ERP_SLOT;
219
220
}

221
222
223
224
225
226
227
228
229
static void ieee80211_tasklet_handler(unsigned long data)
{
	struct ieee80211_local *local = (struct ieee80211_local *) data;
	struct sk_buff *skb;

	while ((skb = skb_dequeue(&local->skb_queue)) ||
	       (skb = skb_dequeue(&local->skb_queue_unreliable))) {
		switch (skb->pkt_type) {
		case IEEE80211_RX_MSG:
230
			/* Clear skb->pkt_type in order to not confuse kernel
231
232
			 * netstack. */
			skb->pkt_type = 0;
Johannes Berg's avatar
Johannes Berg committed
233
			ieee80211_rx(&local->hw, skb);
234
235
236
			break;
		case IEEE80211_TX_STATUS_MSG:
			skb->pkt_type = 0;
Johannes Berg's avatar
Johannes Berg committed
237
			ieee80211_tx_status(&local->hw, skb);
238
			break;
239
		default:
240
241
			WARN(1, "mac80211: Packet is of unknown type %d\n",
			     skb->pkt_type);
242
243
244
245
246
247
			dev_kfree_skb(skb);
			break;
		}
	}
}

248
249
250
251
252
static void ieee80211_restart_work(struct work_struct *work)
{
	struct ieee80211_local *local =
		container_of(work, struct ieee80211_local, restart_work);

253
254
255
	/* wait for scan work complete */
	flush_workqueue(local->workqueue);

256
257
	WARN(test_bit(SCAN_HW_SCANNING, &local->scanning),
	     "%s called with hardware scan in progress\n", __func__);
258

259
	rtnl_lock();
260
	ieee80211_scan_cancel(local);
261
262
263
264
265
266
267
268
	ieee80211_reconfig(local);
	rtnl_unlock();
}

void ieee80211_restart_hw(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);

Johannes Berg's avatar
Johannes Berg committed
269
270
	trace_api_restart_hw(local);

271
272
273
	wiphy_info(hw->wiphy,
		   "Hardware restart was requested\n");

274
	/* use this reason, ieee80211_reconfig will unblock it */
275
	ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
276
277
					IEEE80211_QUEUE_STOP_REASON_SUSPEND,
					false);
278

279
280
281
282
283
284
285
	/*
	 * Stop all Rx during the reconfig. We don't want state changes
	 * or driver callbacks while this is in progress.
	 */
	local->in_reconfig = true;
	barrier();

286
287
288
289
	schedule_work(&local->restart_work);
}
EXPORT_SYMBOL(ieee80211_restart_hw);

290
#ifdef CONFIG_INET
291
292
293
294
295
296
297
298
299
static int ieee80211_ifa_changed(struct notifier_block *nb,
				 unsigned long data, void *arg)
{
	struct in_ifaddr *ifa = arg;
	struct ieee80211_local *local =
		container_of(nb, struct ieee80211_local,
			     ifa_notifier);
	struct net_device *ndev = ifa->ifa_dev->dev;
	struct wireless_dev *wdev = ndev->ieee80211_ptr;
300
	struct in_device *idev;
301
	struct ieee80211_sub_if_data *sdata;
302
	struct ieee80211_bss_conf *bss_conf;
303
	struct ieee80211_if_managed *ifmgd;
304
	int c = 0;
305
306
307
308
309
310
311
312
313

	/* Make sure it's our interface that got changed */
	if (!wdev)
		return NOTIFY_DONE;

	if (wdev->wiphy != local->hw.wiphy)
		return NOTIFY_DONE;

	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);
314
	bss_conf = &sdata->vif.bss_conf;
315
316
317
318
319

	/* ARP filtering is only supported in managed mode */
	if (sdata->vif.type != NL80211_IFTYPE_STATION)
		return NOTIFY_DONE;

Eric Dumazet's avatar
Eric Dumazet committed
320
	idev = __in_dev_get_rtnl(sdata->dev);
321
322
323
	if (!idev)
		return NOTIFY_DONE;

324
	ifmgd = &sdata->u.mgd;
325
	sdata_lock(sdata);
326
327
328

	/* Copy the addresses to the bss_conf list */
	ifa = idev->ifa_list;
329
330
331
	while (ifa) {
		if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN)
			bss_conf->arp_addr_list[c] = ifa->ifa_address;
332
333
334
335
336
337
		ifa = ifa->ifa_next;
		c++;
	}

	bss_conf->arp_addr_cnt = c;

338
	/* Configure driver only if associated (which also implies it is up) */
339
	if (ifmgd->associated)
340
341
342
		ieee80211_bss_info_change_notify(sdata,
						 BSS_CHANGED_ARP_FILTER);

343
	sdata_unlock(sdata);
344

345
	return NOTIFY_OK;
346
}
347
#endif
348

349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
#if IS_ENABLED(CONFIG_IPV6)
static int ieee80211_ifa6_changed(struct notifier_block *nb,
				  unsigned long data, void *arg)
{
	struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg;
	struct inet6_dev *idev = ifa->idev;
	struct net_device *ndev = ifa->idev->dev;
	struct ieee80211_local *local =
		container_of(nb, struct ieee80211_local, ifa6_notifier);
	struct wireless_dev *wdev = ndev->ieee80211_ptr;
	struct ieee80211_sub_if_data *sdata;

	/* Make sure it's our interface that got changed */
	if (!wdev || wdev->wiphy != local->hw.wiphy)
		return NOTIFY_DONE;

	sdata = IEEE80211_DEV_TO_SUB_IF(ndev);

	/*
	 * For now only support station mode. This is mostly because
	 * doing AP would have to handle AP_VLAN in some way ...
	 */
	if (sdata->vif.type != NL80211_IFTYPE_STATION)
		return NOTIFY_DONE;

	drv_ipv6_addr_change(local, sdata, idev);

376
	return NOTIFY_OK;
377
378
379
}
#endif

380
381
382
383
384
/* There isn't a lot of sense in it, but you can transmit anything you like */
static const struct ieee80211_txrx_stypes
ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = {
	[NL80211_IFTYPE_ADHOC] = {
		.tx = 0xffff,
385
386
		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
			BIT(IEEE80211_STYPE_AUTH >> 4) |
387
388
			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
	},
	[NL80211_IFTYPE_STATION] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
	},
	[NL80211_IFTYPE_AP] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
			BIT(IEEE80211_STYPE_AUTH >> 4) |
			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
			BIT(IEEE80211_STYPE_ACTION >> 4),
	},
	[NL80211_IFTYPE_AP_VLAN] = {
		/* copy AP */
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
			BIT(IEEE80211_STYPE_AUTH >> 4) |
			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
414
415
416
417
418
419
420
421
422
423
424
425
			BIT(IEEE80211_STYPE_ACTION >> 4),
	},
	[NL80211_IFTYPE_P2P_CLIENT] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
	},
	[NL80211_IFTYPE_P2P_GO] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) |
			BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) |
			BIT(IEEE80211_STYPE_PROBE_REQ >> 4) |
426
427
428
429
430
			BIT(IEEE80211_STYPE_DISASSOC >> 4) |
			BIT(IEEE80211_STYPE_AUTH >> 4) |
			BIT(IEEE80211_STYPE_DEAUTH >> 4) |
			BIT(IEEE80211_STYPE_ACTION >> 4),
	},
431
432
	[NL80211_IFTYPE_MESH_POINT] = {
		.tx = 0xffff,
433
434
435
		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
			BIT(IEEE80211_STYPE_AUTH >> 4) |
			BIT(IEEE80211_STYPE_DEAUTH >> 4),
436
	},
437
438
439
440
441
	[NL80211_IFTYPE_P2P_DEVICE] = {
		.tx = 0xffff,
		.rx = BIT(IEEE80211_STYPE_ACTION >> 4) |
			BIT(IEEE80211_STYPE_PROBE_REQ >> 4),
	},
442
443
};

444
445
446
447
448
449
static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = {
	.ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR |
			     IEEE80211_HT_AMPDU_PARM_DENSITY,

	.cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
				IEEE80211_HT_CAP_MAX_AMSDU |
Ben Greear's avatar
Ben Greear committed
450
				IEEE80211_HT_CAP_SGI_20 |
451
				IEEE80211_HT_CAP_SGI_40 |
452
453
				IEEE80211_HT_CAP_LDPC_CODING |
				IEEE80211_HT_CAP_40MHZ_INTOLERANT),
454
455
456
457
458
459
	.mcs = {
		.rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff,
			     0xff, 0xff, 0xff, 0xff, 0xff, },
	},
};

460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = {
	.vht_cap_info =
		cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC |
			    IEEE80211_VHT_CAP_SHORT_GI_80 |
			    IEEE80211_VHT_CAP_SHORT_GI_160 |
			    IEEE80211_VHT_CAP_RXSTBC_1 |
			    IEEE80211_VHT_CAP_RXSTBC_2 |
			    IEEE80211_VHT_CAP_RXSTBC_3 |
			    IEEE80211_VHT_CAP_RXSTBC_4 |
			    IEEE80211_VHT_CAP_TXSTBC |
			    IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE |
			    IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE |
			    IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN |
			    IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN |
			    IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK),
	.supp_mcs = {
		.rx_mcs_map = cpu_to_le16(~0),
		.tx_mcs_map = cpu_to_le16(~0),
	},
};

481
482
483
struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
					   const struct ieee80211_ops *ops,
					   const char *requested_name)
484
485
{
	struct ieee80211_local *local;
486
	int priv_size, i;
487
	struct wiphy *wiphy;
488
	bool use_chanctx;
489

490
491
492
493
494
	if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config ||
		    !ops->add_interface || !ops->remove_interface ||
		    !ops->configure_filter))
		return NULL;

495
496
497
	if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove)))
		return NULL;

498
499
500
501
502
503
	/* check all or no channel context operations exist */
	i = !!ops->add_chanctx + !!ops->remove_chanctx +
	    !!ops->change_chanctx + !!ops->assign_vif_chanctx +
	    !!ops->unassign_vif_chanctx;
	if (WARN_ON(i != 0 && i != 5))
		return NULL;
504
	use_chanctx = i == 5;
505

506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
	/* Ensure 32-byte alignment of our private data and hw private data.
	 * We use the wiphy priv data for both our ieee80211_local and for
	 * the driver's private data
	 *
	 * In memory it'll be like this:
	 *
	 * +-------------------------+
	 * | struct wiphy	    |
	 * +-------------------------+
	 * | struct ieee80211_local  |
	 * +-------------------------+
	 * | driver's private data   |
	 * +-------------------------+
	 *
	 */
521
	priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len;
522

523
	wiphy = wiphy_new_nm(&mac80211_config_ops, priv_size, requested_name);
524
525
526
527

	if (!wiphy)
		return NULL;

528
529
	wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes;

530
531
	wiphy->privid = mac80211_wiphy_privid;

532
533
	wiphy->flags |= WIPHY_FLAG_NETNS_OK |
			WIPHY_FLAG_4ADDR_AP |
Johannes Berg's avatar
Johannes Berg committed
534
			WIPHY_FLAG_4ADDR_STATION |
535
			WIPHY_FLAG_REPORTS_OBSS |
536
537
538
539
			WIPHY_FLAG_OFFCHAN_TX;

	if (ops->remain_on_channel)
		wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL;
540

541
542
	wiphy->features |= NL80211_FEATURE_SK_TX_STATUS |
			   NL80211_FEATURE_SAE |
543
			   NL80211_FEATURE_HT_IBSS |
544
			   NL80211_FEATURE_VIF_TXPOWER |
545
			   NL80211_FEATURE_MAC_ON_CREATE |
546
			   NL80211_FEATURE_USERSPACE_MPM;
547

548
	if (!ops->hw_scan)
549
550
551
		wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN |
				   NL80211_FEATURE_AP_SCAN;

552

553
554
	if (!ops->set_key)
		wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
555

556
	wiphy->bss_priv_size = sizeof(struct ieee80211_bss);
557
558

	local = wiphy_priv(wiphy);
559

560
561
	local->hw.wiphy = wiphy;

562
	local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN);
563
564

	local->ops = ops;
565
	local->use_chanctx = use_chanctx;
566

567
568
569
	/* set up some defaults */
	local->hw.queues = 1;
	local->hw.max_rates = 1;
570
	local->hw.max_report_rates = 0;
571
	local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
572
	local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF;
573
	local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE;
574
575
	local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
	local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
576
577
578
	local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS |
					 IEEE80211_RADIOTAP_MCS_HAVE_GI |
					 IEEE80211_RADIOTAP_MCS_HAVE_BW;
579
580
	local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI |
					 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH;
581
582
	local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES;
	local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN;
583
	local->user_power_level = IEEE80211_UNSET_POWER_LEVEL;
584
	wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask;
585
	wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask;
586

587
588
589
590
591
592
593
	local->ext_capa[7] = WLAN_EXT_CAPA8_OPMODE_NOTIF;

	wiphy->extended_capabilities = local->ext_capa;
	wiphy->extended_capabilities_mask = local->ext_capa;
	wiphy->extended_capabilities_len =
		ARRAY_SIZE(local->ext_capa);

594
	INIT_LIST_HEAD(&local->interfaces);
595
596
597

	__hw_addr_init(&local->mc_list);

598
	mutex_init(&local->iflist_mtx);
599
	mutex_init(&local->mtx);
600

Johannes Berg's avatar
Johannes Berg committed
601
	mutex_init(&local->key_mtx);
Johannes Berg's avatar
Johannes Berg committed
602
	spin_lock_init(&local->filter_lock);
603
	spin_lock_init(&local->rx_path_lock);
604
605
	spin_lock_init(&local->queue_stop_reason_lock);

606
607
608
	INIT_LIST_HEAD(&local->chanctx_list);
	mutex_init(&local->chanctx_mtx);

609
	INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work);
610

611
612
	INIT_WORK(&local->restart_work, ieee80211_restart_work);

613
614
615
	INIT_WORK(&local->radar_detected_work,
		  ieee80211_dfs_radar_detected_work);

616
	INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter);
617
	local->smps_mode = IEEE80211_SMPS_OFF;
618

619
620
621
622
623
624
625
	INIT_WORK(&local->dynamic_ps_enable_work,
		  ieee80211_dynamic_ps_enable_work);
	INIT_WORK(&local->dynamic_ps_disable_work,
		  ieee80211_dynamic_ps_disable_work);
	setup_timer(&local->dynamic_ps_timer,
		    ieee80211_dynamic_ps_timer, (unsigned long) local);

626
627
628
	INIT_WORK(&local->sched_scan_stopped_work,
		  ieee80211_sched_scan_stopped_work);

629
630
631
	spin_lock_init(&local->ack_status_lock);
	idr_init(&local->ack_status_frames);

632
633
	sta_info_init(local);

634
	for (i = 0; i < IEEE80211_MAX_QUEUES; i++) {
635
		skb_queue_head_init(&local->pending[i]);
636
637
		atomic_set(&local->agg_queue_stop[i], 0);
	}
638
639
640
641
642
643
644
645
646
647
	tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending,
		     (unsigned long)local);

	tasklet_init(&local->tasklet,
		     ieee80211_tasklet_handler,
		     (unsigned long) local);

	skb_queue_head_init(&local->skb_queue);
	skb_queue_head_init(&local->skb_queue_unreliable);

648
649
	ieee80211_led_names(local);

650
	ieee80211_roc_setup(local);
651

Johannes Berg's avatar
Johannes Berg committed
652
	return &local->hw;
653
}
654
EXPORT_SYMBOL(ieee80211_alloc_hw_nm);
655

656
static int ieee80211_init_cipher_suites(struct ieee80211_local *local)
657
{
658
659
660
661
662
	bool have_wep = !(IS_ERR(local->wep_tx_tfm) ||
			  IS_ERR(local->wep_rx_tfm));
	bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE;
	int n_suites = 0, r = 0, w = 0;
	u32 *suites;
663
	static const u32 cipher_suites[] = {
664
		/* keep WEP first, it may be removed below */
665
666
667
668
		WLAN_CIPHER_SUITE_WEP40,
		WLAN_CIPHER_SUITE_WEP104,
		WLAN_CIPHER_SUITE_TKIP,
		WLAN_CIPHER_SUITE_CCMP,
Jouni Malinen's avatar
Jouni Malinen committed
669
		WLAN_CIPHER_SUITE_CCMP_256,
670
671
		WLAN_CIPHER_SUITE_GCMP,
		WLAN_CIPHER_SUITE_GCMP_256,
672
673

		/* keep last -- depends on hw flags! */
674
675
		WLAN_CIPHER_SUITE_AES_CMAC,
		WLAN_CIPHER_SUITE_BIP_CMAC_256,
676
677
		WLAN_CIPHER_SUITE_BIP_GMAC_128,
		WLAN_CIPHER_SUITE_BIP_GMAC_256,
678
	};
679

680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
	if (local->hw.flags & IEEE80211_HW_SW_CRYPTO_CONTROL ||
	    local->hw.wiphy->cipher_suites) {
		/* If the driver advertises, or doesn't support SW crypto,
		 * we only need to remove WEP if necessary.
		 */
		if (have_wep)
			return 0;

		/* well if it has _no_ ciphers ... fine */
		if (!local->hw.wiphy->n_cipher_suites)
			return 0;

		/* Driver provides cipher suites, but we need to exclude WEP */
		suites = kmemdup(local->hw.wiphy->cipher_suites,
				 sizeof(u32) * local->hw.wiphy->n_cipher_suites,
				 GFP_KERNEL);
		if (!suites)
			return -ENOMEM;
698

699
700
701
702
703
704
705
706
707
708
709
710
711
		for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) {
			u32 suite = local->hw.wiphy->cipher_suites[r];

			if (suite == WLAN_CIPHER_SUITE_WEP40 ||
			    suite == WLAN_CIPHER_SUITE_WEP104)
				continue;
			suites[w++] = suite;
		}
	} else if (!local->hw.cipher_schemes) {
		/* If the driver doesn't have cipher schemes, there's nothing
		 * else to do other than assign the (software supported and
		 * perhaps offloaded) cipher suites.
		 */
712
713
714
715
		local->hw.wiphy->cipher_suites = cipher_suites;
		local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites);

		if (!have_mfp)
716
			local->hw.wiphy->n_cipher_suites -= 4;
717
718
719
720
721
722

		if (!have_wep) {
			local->hw.wiphy->cipher_suites += 2;
			local->hw.wiphy->n_cipher_suites -= 2;
		}

723
		/* not dynamically allocated, so just return */
724
		return 0;
725
726
	} else {
		const struct ieee80211_cipher_scheme *cs;
727

728
729
730
731
732
		cs = local->hw.cipher_schemes;

		/* Driver specifies cipher schemes only (but not cipher suites
		 * including the schemes)
		 *
733
		 * We start counting ciphers defined by schemes, TKIP, CCMP,
Jouni Malinen's avatar
Jouni Malinen committed
734
		 * CCMP-256, GCMP, and GCMP-256
735
		 */
Jouni Malinen's avatar
Jouni Malinen committed
736
		n_suites = local->hw.n_cipher_schemes + 5;
737
738
739
740
741

		/* check if we have WEP40 and WEP104 */
		if (have_wep)
			n_suites += 2;

742
743
744
		/* check if we have AES_CMAC, BIP-CMAC-256, BIP-GMAC-128,
		 * BIP-GMAC-256
		 */
745
		if (have_mfp)
746
			n_suites += 4;
747
748
749
750
751
752

		suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL);
		if (!suites)
			return -ENOMEM;

		suites[w++] = WLAN_CIPHER_SUITE_CCMP;
Jouni Malinen's avatar
Jouni Malinen committed
753
		suites[w++] = WLAN_CIPHER_SUITE_CCMP_256;
754
		suites[w++] = WLAN_CIPHER_SUITE_TKIP;
755
756
		suites[w++] = WLAN_CIPHER_SUITE_GCMP;
		suites[w++] = WLAN_CIPHER_SUITE_GCMP_256;
757
758
759
760
761
762

		if (have_wep) {
			suites[w++] = WLAN_CIPHER_SUITE_WEP40;
			suites[w++] = WLAN_CIPHER_SUITE_WEP104;
		}

763
		if (have_mfp) {
764
			suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC;
765
			suites[w++] = WLAN_CIPHER_SUITE_BIP_CMAC_256;
766
767
			suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_128;
			suites[w++] = WLAN_CIPHER_SUITE_BIP_GMAC_256;
768
		}
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790

		for (r = 0; r < local->hw.n_cipher_schemes; r++)
			suites[w++] = cs[r].cipher;
	}

	local->hw.wiphy->cipher_suites = suites;
	local->hw.wiphy->n_cipher_suites = w;
	local->wiphy_ciphers_allocated = true;

	return 0;
}

int ieee80211_register_hw(struct ieee80211_hw *hw)
{
	struct ieee80211_local *local = hw_to_local(hw);
	int result, i;
	enum ieee80211_band band;
	int channels, max_bitrates;
	bool supp_ht, supp_vht;
	netdev_features_t feature_whitelist;
	struct cfg80211_chan_def dflt_chandef = {};

791
792
793
794
795
	if (hw->flags & IEEE80211_HW_QUEUE_CONTROL &&
	    (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE ||
	     local->hw.offchannel_tx_hw_queue >= local->hw.queues))
		return -EINVAL;

796
797
	if ((hw->wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH) &&
	    (!local->ops->tdls_channel_switch ||
798
799
	     !local->ops->tdls_cancel_channel_switch ||
	     !local->ops->tdls_recv_channel_switch))
800
801
		return -EOPNOTSUPP;

802
#ifdef CONFIG_PM
803
	if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume))
804
		return -EINVAL;
805
#endif
806

807
808
809
810
811
812
813
814
815
	if (!local->use_chanctx) {
		for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
			const struct ieee80211_iface_combination *comb;

			comb = &local->hw.wiphy->iface_combinations[i];

			if (comb->num_different_channels > 1)
				return -EINVAL;
		}
816
	} else {
817
818
819
820
821
822
823
		/*
		 * WDS is currently prohibited when channel contexts are used
		 * because there's no clear definition of which channel WDS
		 * type interfaces use
		 */
		if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS))
			return -EINVAL;
824

825
		/* DFS is not supported with multi-channel combinations yet */
826
827
828
829
830
		for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) {
			const struct ieee80211_iface_combination *comb;

			comb = &local->hw.wiphy->iface_combinations[i];

831
832
			if (comb->radar_detect_widths &&
			    comb->num_different_channels > 1)
833
834
				return -EINVAL;
		}
835
836
	}

837
838
839
840
841
842
	/* Only HW csum features are currently compatible with mac80211 */
	feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
			    NETIF_F_HW_CSUM;
	if (WARN_ON(hw->netdev_features & ~feature_whitelist))
		return -EINVAL;

843
844
845
	if (hw->max_report_rates == 0)
		hw->max_report_rates = hw->max_rates;

846
847
	local->rx_chains = 1;

848
849
850
851
852
	/*
	 * generic code guarantees at least one band,
	 * set this very early because much code assumes
	 * that hw.conf.channel is assigned
	 */
853
	channels = 0;
854
	max_bitrates = 0;
855
	supp_ht = false;
856
	supp_vht = false;
857
858
859
860
	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		struct ieee80211_supported_band *sband;

		sband = local->hw.wiphy->bands[band];
861
862
		if (!sband)
			continue;
863
864
865
866
867

		if (!dflt_chandef.chan) {
			cfg80211_chandef_create(&dflt_chandef,
						&sband->channels[0],
						NL80211_CHAN_NO_HT);
868
			/* init channel we're on */
869
870
871
872
873
			if (!local->use_chanctx && !local->_oper_chandef.chan) {
				local->hw.conf.chandef = dflt_chandef;
				local->_oper_chandef = dflt_chandef;
			}
			local->monitor_chandef = dflt_chandef;
874
		}
875

876
877
878
879
		channels += sband->n_channels;

		if (max_bitrates < sband->n_bitrates)
			max_bitrates = sband->n_bitrates;
880
		supp_ht = supp_ht || sband->ht_cap.ht_supported;
881
		supp_vht = supp_vht || sband->vht_cap.vht_supported;
882
883
884
885
886
887
888

		if (sband->ht_cap.ht_supported)
			local->rx_chains =
				max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs),
				    local->rx_chains);

		/* TODO: consider VHT for RX chains, hopefully it's the same */
889
	}
890

891
	/* if low-level driver supports AP, we also support VLAN */
892
893
894
895
	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) {
		hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN);
		hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN);
	}
896
897

	/* mac80211 always supports monitor */
898
899
900
	hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR);
	hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR);

Johannes Berg's avatar
Johannes Berg committed
901
	/* mac80211 doesn't support more than one IBSS interface right now */
902
903
904
905
906
907
908
909
910
911
912
913
	for (i = 0; i < hw->wiphy->n_iface_combinations; i++) {
		const struct ieee80211_iface_combination *c;
		int j;

		c = &hw->wiphy->iface_combinations[i];

		for (j = 0; j < c->n_limits; j++)
			if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) &&
			    c->limits[j].max > 1)
				return -EINVAL;
	}

914
915
916
917
918
919
920
921
922
923
924
	local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) +
				      sizeof(void *) * channels, GFP_KERNEL);
	if (!local->int_scan_req)
		return -ENOMEM;

	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
		if (!local->hw.wiphy->bands[band])
			continue;
		local->int_scan_req->rates[band] = (u32) -1;
	}

925
926
927
928
929
#ifndef CONFIG_MAC80211_MESH
	/* mesh depends on Kconfig, but drivers should set it if they want */
	local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT);
#endif

930
931
932
933
934
	/* if the underlying driver supports mesh, mac80211 will (at least)
	 * provide routing of mesh authentication frames to userspace */
	if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT))
		local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH;

935
936
937
	/* mac80211 supports control port protocol changing */
	local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL;

938
	if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) {
Johannes Berg's avatar
Johannes Berg committed
939
		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM;
940
	} else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) {
Johannes Berg's avatar
Johannes Berg committed
941
		local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC;
942
943
944
945
946
		if (hw->max_signal <= 0) {
			result = -EINVAL;
			goto fail_wiphy_register;
		}
	}
Johannes Berg's avatar
Johannes Berg committed
947

948
949
950
	/*
	 * Calculate scan IE length -- we need this to alloc
	 * memory and to subtract from the driver limit. It
951
	 * includes the DS Params, (extended) supported rates, and HT
952
953
	 * information -- SSID is the driver's responsibility.
	 */
954
955
	local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ +
		3 /* DS Params */;
956
957
	if (supp_ht)
		local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap);
958

959
	if (supp_vht)
960
		local->scan_ies_len +=
961
			2 + sizeof(struct ieee80211_vht_cap);
962

963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
	if (!local->ops->hw_scan) {
		/* For hw_scan, driver needs to set these up. */
		local->hw.wiphy->max_scan_ssids = 4;
		local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
	}

	/*
	 * If the driver supports any scan IEs, then assume the
	 * limit includes the IEs mac80211 will add, otherwise
	 * leave it at zero and let the driver sort it out; we
	 * still pass our IEs to the driver but userspace will
	 * not be allowed to in that case.
	 */
	if (local->hw.wiphy->max_scan_ie_len)
		local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len;

979
980
981
982
983
984
	WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes,
					 local->hw.n_cipher_schemes));

	result = ieee80211_init_cipher_suites(local);
	if (result < 0)
		goto fail_wiphy_register;
985

986
987
	if (!local->ops->remain_on_channel)
		local->hw.wiphy->max_remain_on_channel_duration = 5000;
988

989
990
991
992
	/* mac80211 based drivers don't support internal TDLS setup */
	if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)
		local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP;

993
994
995
996
	/* mac80211 supports eCSA, if the driver supports STA CSA at all */
	if (local->hw.flags & IEEE80211_HW_CHANCTX_STA_CSA)
		local->ext_capa[0] |= WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING;

997
998
	local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM;

999
1000
	result = wiphy_register(local->hw.wiphy);
	if (result < 0)
1001
		goto fail_wiphy_register;
1002

1003
1004
1005
1006
1007
1008
1009
	/*
	 * We use the number of queues for feature tests (QoS, HT) internally
	 * so restrict them appropriately.
	 */
	if (hw->queues > IEEE80211_MAX_QUEUES)
		hw->queues = IEEE80211_MAX_QUEUES;

1010
	local->workqueue =
1011
		alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy));
1012
	if (!local->workqueue) {
1013
1014
1015
1016
		result = -ENOMEM;
		goto fail_workqueue;
	}

1017
1018
1019
1020
1021
	/*
	 * The hardware needs headroom for sending the frame,
	 * and we need some headroom for passing the frame to monitor
	 * interfaces, but never both at the same time.
	 */
1022
	local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom,
1023
				   IEEE80211_TX_STATUS_HEADROOM);
1024

1025
1026
	debugfs_hw_add(local);

1027
1028
1029
1030
	/*
	 * if the driver doesn't specify a max listen interval we
	 * use 5 which should be a safe default
	 */
1031
	if (local->hw.max_listen_interval == 0)
1032
		local->hw.max_listen_interval = 5;
1033
1034
1035

	local->hw.conf.listen_interval = local->hw.max_listen_interval;

1036
	local->dynamic_ps_forced_timeout = -1;
1037

1038
	result = ieee80211_wep_init(local);
1039
	if (result < 0)