xref: /linux/drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c (revision 258e4bfcbdaa6d128c391e6e25f03d54dee4f226)
1 /******************************************************************************
2  *
3  * This file is provided under a dual BSD/GPLv2 license.  When using or
4  * redistributing this file, you may do so under either license.
5  *
6  * GPL LICENSE SUMMARY
7  *
8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10  * Copyright(c) 2016 Intel Deutschland GmbH
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of version 2 of the GNU General Public License as
14  * published by the Free Software Foundation.
15  *
16  * This program is distributed in the hope that it will be useful, but
17  * WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19  * General Public License for more details.
20  *
21  * You should have received a copy of the GNU General Public License
22  * along with this program; if not, write to the Free Software
23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
24  * USA
25  *
26  * The full GNU General Public License is included in this distribution
27  * in the file called COPYING.
28  *
29  * Contact Information:
30  *  Intel Linux Wireless <linuxwifi@intel.com>
31  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
32  *
33  * BSD LICENSE
34  *
35  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
36  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
37  * All rights reserved.
38  *
39  * Redistribution and use in source and binary forms, with or without
40  * modification, are permitted provided that the following conditions
41  * are met:
42  *
43  *  * Redistributions of source code must retain the above copyright
44  *    notice, this list of conditions and the following disclaimer.
45  *  * Redistributions in binary form must reproduce the above copyright
46  *    notice, this list of conditions and the following disclaimer in
47  *    the documentation and/or other materials provided with the
48  *    distribution.
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50  *    contributors may be used to endorse or promote products derived
51  *    from this software without specific prior written permission.
52  *
53  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
54  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
55  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
56  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
57  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
58  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
59  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
60  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
61  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
62  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
63  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
64  *
65  *****************************************************************************/
66 #include <linux/kernel.h>
67 #include <linux/slab.h>
68 #include <linux/skbuff.h>
69 #include <linux/netdevice.h>
70 #include <linux/etherdevice.h>
71 #include <linux/ip.h>
72 #include <linux/if_arp.h>
73 #include <linux/time.h>
74 #include <net/mac80211.h>
75 #include <net/ieee80211_radiotap.h>
76 #include <net/tcp.h>
77 
78 #include "iwl-op-mode.h"
79 #include "iwl-io.h"
80 #include "mvm.h"
81 #include "sta.h"
82 #include "time-event.h"
83 #include "iwl-eeprom-parse.h"
84 #include "iwl-phy-db.h"
85 #include "testmode.h"
86 #include "iwl-fw-error-dump.h"
87 #include "iwl-prph.h"
88 #include "iwl-nvm-parse.h"
89 #include "fw-dbg.h"
90 
91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
92 	{
93 		.max = 1,
94 		.types = BIT(NL80211_IFTYPE_STATION),
95 	},
96 	{
97 		.max = 1,
98 		.types = BIT(NL80211_IFTYPE_AP) |
99 			BIT(NL80211_IFTYPE_P2P_CLIENT) |
100 			BIT(NL80211_IFTYPE_P2P_GO),
101 	},
102 	{
103 		.max = 1,
104 		.types = BIT(NL80211_IFTYPE_P2P_DEVICE),
105 	},
106 };
107 
108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
109 	{
110 		.num_different_channels = 2,
111 		.max_interfaces = 3,
112 		.limits = iwl_mvm_limits,
113 		.n_limits = ARRAY_SIZE(iwl_mvm_limits),
114 	},
115 };
116 
117 #ifdef CONFIG_PM_SLEEP
118 static const struct nl80211_wowlan_tcp_data_token_feature
119 iwl_mvm_wowlan_tcp_token_feature = {
120 	.min_len = 0,
121 	.max_len = 255,
122 	.bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
123 };
124 
125 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
126 	.tok = &iwl_mvm_wowlan_tcp_token_feature,
127 	.data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
128 			    sizeof(struct ethhdr) -
129 			    sizeof(struct iphdr) -
130 			    sizeof(struct tcphdr),
131 	.data_interval_max = 65535, /* __le16 in API */
132 	.wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
133 			    sizeof(struct ethhdr) -
134 			    sizeof(struct iphdr) -
135 			    sizeof(struct tcphdr),
136 	.seq = true,
137 };
138 #endif
139 
140 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
141 /*
142  * Use the reserved field to indicate magic values.
143  * these values will only be used internally by the driver,
144  * and won't make it to the fw (reserved will be 0).
145  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
146  *	be the vif's ip address. in case there is not a single
147  *	ip address (0, or more than 1), this attribute will
148  *	be skipped.
149  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
150  *	the LSB bytes of the vif's mac address
151  */
152 enum {
153 	BC_FILTER_MAGIC_NONE = 0,
154 	BC_FILTER_MAGIC_IP,
155 	BC_FILTER_MAGIC_MAC,
156 };
157 
158 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
159 	{
160 		/* arp */
161 		.discard = 0,
162 		.frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
163 		.attrs = {
164 			{
165 				/* frame type - arp, hw type - ethernet */
166 				.offset_type =
167 					BCAST_FILTER_OFFSET_PAYLOAD_START,
168 				.offset = sizeof(rfc1042_header),
169 				.val = cpu_to_be32(0x08060001),
170 				.mask = cpu_to_be32(0xffffffff),
171 			},
172 			{
173 				/* arp dest ip */
174 				.offset_type =
175 					BCAST_FILTER_OFFSET_PAYLOAD_START,
176 				.offset = sizeof(rfc1042_header) + 2 +
177 					  sizeof(struct arphdr) +
178 					  ETH_ALEN + sizeof(__be32) +
179 					  ETH_ALEN,
180 				.mask = cpu_to_be32(0xffffffff),
181 				/* mark it as special field */
182 				.reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
183 			},
184 		},
185 	},
186 	{
187 		/* dhcp offer bcast */
188 		.discard = 0,
189 		.frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
190 		.attrs = {
191 			{
192 				/* udp dest port - 68 (bootp client)*/
193 				.offset_type = BCAST_FILTER_OFFSET_IP_END,
194 				.offset = offsetof(struct udphdr, dest),
195 				.val = cpu_to_be32(0x00440000),
196 				.mask = cpu_to_be32(0xffff0000),
197 			},
198 			{
199 				/* dhcp - lsb bytes of client hw address */
200 				.offset_type = BCAST_FILTER_OFFSET_IP_END,
201 				.offset = 38,
202 				.mask = cpu_to_be32(0xffffffff),
203 				/* mark it as special field */
204 				.reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
205 			},
206 		},
207 	},
208 	/* last filter must be empty */
209 	{},
210 };
211 #endif
212 
213 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
214 {
215 	if (!iwl_mvm_is_d0i3_supported(mvm))
216 		return;
217 
218 	IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
219 	spin_lock_bh(&mvm->refs_lock);
220 	mvm->refs[ref_type]++;
221 	spin_unlock_bh(&mvm->refs_lock);
222 	iwl_trans_ref(mvm->trans);
223 }
224 
225 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
226 {
227 	if (!iwl_mvm_is_d0i3_supported(mvm))
228 		return;
229 
230 	IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
231 	spin_lock_bh(&mvm->refs_lock);
232 	WARN_ON(!mvm->refs[ref_type]--);
233 	spin_unlock_bh(&mvm->refs_lock);
234 	iwl_trans_unref(mvm->trans);
235 }
236 
237 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
238 				     enum iwl_mvm_ref_type except_ref)
239 {
240 	int i, j;
241 
242 	if (!iwl_mvm_is_d0i3_supported(mvm))
243 		return;
244 
245 	spin_lock_bh(&mvm->refs_lock);
246 	for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
247 		if (except_ref == i || !mvm->refs[i])
248 			continue;
249 
250 		IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
251 			      i, mvm->refs[i]);
252 		for (j = 0; j < mvm->refs[i]; j++)
253 			iwl_trans_unref(mvm->trans);
254 		mvm->refs[i] = 0;
255 	}
256 	spin_unlock_bh(&mvm->refs_lock);
257 }
258 
259 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
260 {
261 	int i;
262 	bool taken = false;
263 
264 	if (!iwl_mvm_is_d0i3_supported(mvm))
265 		return true;
266 
267 	spin_lock_bh(&mvm->refs_lock);
268 	for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
269 		if (mvm->refs[i]) {
270 			taken = true;
271 			break;
272 		}
273 	}
274 	spin_unlock_bh(&mvm->refs_lock);
275 
276 	return taken;
277 }
278 
279 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
280 {
281 	iwl_mvm_ref(mvm, ref_type);
282 
283 	if (!wait_event_timeout(mvm->d0i3_exit_waitq,
284 				!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
285 				HZ)) {
286 		WARN_ON_ONCE(1);
287 		iwl_mvm_unref(mvm, ref_type);
288 		return -EIO;
289 	}
290 
291 	return 0;
292 }
293 
294 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
295 {
296 	int i;
297 
298 	memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
299 	for (i = 0; i < NUM_PHY_CTX; i++) {
300 		mvm->phy_ctxts[i].id = i;
301 		mvm->phy_ctxts[i].ref = 0;
302 	}
303 }
304 
305 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
306 						  const char *alpha2,
307 						  enum iwl_mcc_source src_id,
308 						  bool *changed)
309 {
310 	struct ieee80211_regdomain *regd = NULL;
311 	struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
312 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
313 	struct iwl_mcc_update_resp *resp;
314 
315 	IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
316 
317 	lockdep_assert_held(&mvm->mutex);
318 
319 	resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
320 	if (IS_ERR_OR_NULL(resp)) {
321 		IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
322 			      PTR_ERR_OR_ZERO(resp));
323 		goto out;
324 	}
325 
326 	if (changed)
327 		*changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
328 
329 	regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
330 				      __le32_to_cpu(resp->n_channels),
331 				      resp->channels,
332 				      __le16_to_cpu(resp->mcc));
333 	/* Store the return source id */
334 	src_id = resp->source_id;
335 	kfree(resp);
336 	if (IS_ERR_OR_NULL(regd)) {
337 		IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
338 			      PTR_ERR_OR_ZERO(regd));
339 		goto out;
340 	}
341 
342 	IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
343 		      regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
344 	mvm->lar_regdom_set = true;
345 	mvm->mcc_src = src_id;
346 
347 out:
348 	return regd;
349 }
350 
351 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
352 {
353 	bool changed;
354 	struct ieee80211_regdomain *regd;
355 
356 	if (!iwl_mvm_is_lar_supported(mvm))
357 		return;
358 
359 	regd = iwl_mvm_get_current_regdomain(mvm, &changed);
360 	if (!IS_ERR_OR_NULL(regd)) {
361 		/* only update the regulatory core if changed */
362 		if (changed)
363 			regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
364 
365 		kfree(regd);
366 	}
367 }
368 
369 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
370 							  bool *changed)
371 {
372 	return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
373 				     iwl_mvm_is_wifi_mcc_supported(mvm) ?
374 				     MCC_SOURCE_GET_CURRENT :
375 				     MCC_SOURCE_OLD_FW, changed);
376 }
377 
378 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
379 {
380 	enum iwl_mcc_source used_src;
381 	struct ieee80211_regdomain *regd;
382 	int ret;
383 	bool changed;
384 	const struct ieee80211_regdomain *r =
385 			rtnl_dereference(mvm->hw->wiphy->regd);
386 
387 	if (!r)
388 		return -ENOENT;
389 
390 	/* save the last source in case we overwrite it below */
391 	used_src = mvm->mcc_src;
392 	if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
393 		/* Notify the firmware we support wifi location updates */
394 		regd = iwl_mvm_get_current_regdomain(mvm, NULL);
395 		if (!IS_ERR_OR_NULL(regd))
396 			kfree(regd);
397 	}
398 
399 	/* Now set our last stored MCC and source */
400 	regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
401 				     &changed);
402 	if (IS_ERR_OR_NULL(regd))
403 		return -EIO;
404 
405 	/* update cfg80211 if the regdomain was changed */
406 	if (changed)
407 		ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
408 	else
409 		ret = 0;
410 
411 	kfree(regd);
412 	return ret;
413 }
414 
415 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
416 {
417 	struct ieee80211_hw *hw = mvm->hw;
418 	int num_mac, ret, i;
419 	static const u32 mvm_ciphers[] = {
420 		WLAN_CIPHER_SUITE_WEP40,
421 		WLAN_CIPHER_SUITE_WEP104,
422 		WLAN_CIPHER_SUITE_TKIP,
423 		WLAN_CIPHER_SUITE_CCMP,
424 	};
425 
426 	/* Tell mac80211 our characteristics */
427 	ieee80211_hw_set(hw, SIGNAL_DBM);
428 	ieee80211_hw_set(hw, SPECTRUM_MGMT);
429 	ieee80211_hw_set(hw, REPORTS_TX_ACK_STATUS);
430 	ieee80211_hw_set(hw, QUEUE_CONTROL);
431 	ieee80211_hw_set(hw, WANT_MONITOR_VIF);
432 	ieee80211_hw_set(hw, SUPPORTS_PS);
433 	ieee80211_hw_set(hw, SUPPORTS_DYNAMIC_PS);
434 	ieee80211_hw_set(hw, AMPDU_AGGREGATION);
435 	ieee80211_hw_set(hw, TIMING_BEACON_ONLY);
436 	ieee80211_hw_set(hw, CONNECTION_MONITOR);
437 	ieee80211_hw_set(hw, CHANCTX_STA_CSA);
438 	ieee80211_hw_set(hw, SUPPORT_FAST_XMIT);
439 	ieee80211_hw_set(hw, SUPPORTS_CLONED_SKBS);
440 	ieee80211_hw_set(hw, SUPPORTS_AMSDU_IN_AMPDU);
441 	ieee80211_hw_set(hw, NEEDS_UNIQUE_STA_ADDR);
442 
443 	if (mvm->trans->max_skb_frags)
444 		hw->netdev_features = NETIF_F_HIGHDMA | NETIF_F_SG;
445 
446 	hw->queues = mvm->first_agg_queue;
447 	hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
448 	hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
449 				    IEEE80211_RADIOTAP_MCS_HAVE_STBC;
450 	hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
451 		IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
452 	hw->rate_control_algorithm = "iwl-mvm-rs";
453 	hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
454 	hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
455 
456 	BUILD_BUG_ON(ARRAY_SIZE(mvm->ciphers) < ARRAY_SIZE(mvm_ciphers) + 2);
457 	memcpy(mvm->ciphers, mvm_ciphers, sizeof(mvm_ciphers));
458 	hw->wiphy->n_cipher_suites = ARRAY_SIZE(mvm_ciphers);
459 	hw->wiphy->cipher_suites = mvm->ciphers;
460 
461 	/*
462 	 * Enable 11w if advertised by firmware and software crypto
463 	 * is not enabled (as the firmware will interpret some mgmt
464 	 * packets, so enabling it with software crypto isn't safe)
465 	 */
466 	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
467 	    !iwlwifi_mod_params.sw_crypto) {
468 		ieee80211_hw_set(hw, MFP_CAPABLE);
469 		mvm->ciphers[hw->wiphy->n_cipher_suites] =
470 			WLAN_CIPHER_SUITE_AES_CMAC;
471 		hw->wiphy->n_cipher_suites++;
472 	}
473 
474 	/* currently FW API supports only one optional cipher scheme */
475 	if (mvm->fw->cs[0].cipher) {
476 		mvm->hw->n_cipher_schemes = 1;
477 		mvm->hw->cipher_schemes = &mvm->fw->cs[0];
478 		mvm->ciphers[hw->wiphy->n_cipher_suites] =
479 			mvm->fw->cs[0].cipher;
480 		hw->wiphy->n_cipher_suites++;
481 	}
482 
483 	ieee80211_hw_set(hw, SINGLE_SCAN_ON_ALL_BANDS);
484 	hw->wiphy->features |=
485 		NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
486 		NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR |
487 		NL80211_FEATURE_ND_RANDOM_MAC_ADDR;
488 
489 	hw->sta_data_size = sizeof(struct iwl_mvm_sta);
490 	hw->vif_data_size = sizeof(struct iwl_mvm_vif);
491 	hw->chanctx_data_size = sizeof(u16);
492 
493 	hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
494 		BIT(NL80211_IFTYPE_P2P_CLIENT) |
495 		BIT(NL80211_IFTYPE_AP) |
496 		BIT(NL80211_IFTYPE_P2P_GO) |
497 		BIT(NL80211_IFTYPE_P2P_DEVICE) |
498 		BIT(NL80211_IFTYPE_ADHOC);
499 
500 	hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
501 	hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
502 	if (iwl_mvm_is_lar_supported(mvm))
503 		hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
504 	else
505 		hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
506 					       REGULATORY_DISABLE_BEACON_HINTS;
507 
508 	if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
509 		hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
510 
511 	hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
512 
513 	hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
514 	hw->wiphy->n_iface_combinations =
515 		ARRAY_SIZE(iwl_mvm_iface_combinations);
516 
517 	hw->wiphy->max_remain_on_channel_duration = 10000;
518 	hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
519 	/* we can compensate an offset of up to 3 channels = 15 MHz */
520 	hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
521 
522 	/* Extract MAC address */
523 	memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
524 	hw->wiphy->addresses = mvm->addresses;
525 	hw->wiphy->n_addresses = 1;
526 
527 	/* Extract additional MAC addresses if available */
528 	num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
529 		min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
530 
531 	for (i = 1; i < num_mac; i++) {
532 		memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
533 		       ETH_ALEN);
534 		mvm->addresses[i].addr[5]++;
535 		hw->wiphy->n_addresses++;
536 	}
537 
538 	iwl_mvm_reset_phy_ctxts(mvm);
539 
540 	hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
541 
542 	hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
543 
544 	BUILD_BUG_ON(IWL_MVM_SCAN_STOPPING_MASK & IWL_MVM_SCAN_MASK);
545 	BUILD_BUG_ON(IWL_MVM_MAX_UMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK) ||
546 		     IWL_MVM_MAX_LMAC_SCANS > HWEIGHT32(IWL_MVM_SCAN_MASK));
547 
548 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN))
549 		mvm->max_scans = IWL_MVM_MAX_UMAC_SCANS;
550 	else
551 		mvm->max_scans = IWL_MVM_MAX_LMAC_SCANS;
552 
553 	if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
554 		hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
555 			&mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
556 	if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
557 		hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
558 			&mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
559 
560 		if (fw_has_capa(&mvm->fw->ucode_capa,
561 				IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
562 		    fw_has_api(&mvm->fw->ucode_capa,
563 			       IWL_UCODE_TLV_API_LQ_SS_PARAMS))
564 			hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
565 				IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
566 	}
567 
568 	hw->wiphy->hw_version = mvm->trans->hw_id;
569 
570 	if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
571 		hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
572 	else
573 		hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
574 
575 	hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
576 	hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
577 	hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
578 	/* we create the 802.11 header and zero length SSID IE. */
579 	hw->wiphy->max_sched_scan_ie_len =
580 		SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
581 	hw->wiphy->max_sched_scan_plans = IWL_MAX_SCHED_SCAN_PLANS;
582 	hw->wiphy->max_sched_scan_plan_interval = U16_MAX;
583 
584 	/*
585 	 * the firmware uses u8 for num of iterations, but 0xff is saved for
586 	 * infinite loop, so the maximum number of iterations is actually 254.
587 	 */
588 	hw->wiphy->max_sched_scan_plan_iterations = 254;
589 
590 	hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
591 			       NL80211_FEATURE_LOW_PRIORITY_SCAN |
592 			       NL80211_FEATURE_P2P_GO_OPPPS |
593 			       NL80211_FEATURE_DYNAMIC_SMPS |
594 			       NL80211_FEATURE_STATIC_SMPS |
595 			       NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
596 
597 	if (fw_has_capa(&mvm->fw->ucode_capa,
598 			IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT))
599 		hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
600 	if (fw_has_capa(&mvm->fw->ucode_capa,
601 			IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT))
602 		hw->wiphy->features |= NL80211_FEATURE_QUIET;
603 
604 	if (fw_has_capa(&mvm->fw->ucode_capa,
605 			IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT))
606 		hw->wiphy->features |=
607 			NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
608 
609 	if (fw_has_capa(&mvm->fw->ucode_capa,
610 			IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT))
611 		hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
612 
613 	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
614 
615 #ifdef CONFIG_PM_SLEEP
616 	if (iwl_mvm_is_d0i3_supported(mvm) &&
617 	    device_can_wakeup(mvm->trans->dev)) {
618 		mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
619 		hw->wiphy->wowlan = &mvm->wowlan;
620 	}
621 
622 	if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
623 	    mvm->trans->ops->d3_suspend &&
624 	    mvm->trans->ops->d3_resume &&
625 	    device_can_wakeup(mvm->trans->dev)) {
626 		mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
627 				     WIPHY_WOWLAN_DISCONNECT |
628 				     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
629 				     WIPHY_WOWLAN_RFKILL_RELEASE |
630 				     WIPHY_WOWLAN_NET_DETECT;
631 		if (!iwlwifi_mod_params.sw_crypto)
632 			mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
633 					     WIPHY_WOWLAN_GTK_REKEY_FAILURE |
634 					     WIPHY_WOWLAN_4WAY_HANDSHAKE;
635 
636 		mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
637 		mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
638 		mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
639 		mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
640 		mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
641 		hw->wiphy->wowlan = &mvm->wowlan;
642 	}
643 #endif
644 
645 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
646 	/* assign default bcast filtering configuration */
647 	mvm->bcast_filters = iwl_mvm_default_bcast_filters;
648 #endif
649 
650 	ret = iwl_mvm_leds_init(mvm);
651 	if (ret)
652 		return ret;
653 
654 	if (fw_has_capa(&mvm->fw->ucode_capa,
655 			IWL_UCODE_TLV_CAPA_TDLS_SUPPORT)) {
656 		IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
657 		hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
658 		ieee80211_hw_set(hw, TDLS_WIDER_BW);
659 	}
660 
661 	if (fw_has_capa(&mvm->fw->ucode_capa,
662 			IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH)) {
663 		IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
664 		hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
665 	}
666 
667 	hw->netdev_features |= mvm->cfg->features;
668 	if (!iwl_mvm_is_csum_supported(mvm))
669 		hw->netdev_features &= ~NETIF_F_RXCSUM;
670 
671 	if (IWL_MVM_SW_TX_CSUM_OFFLOAD)
672 		hw->netdev_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
673 			NETIF_F_TSO | NETIF_F_TSO6;
674 
675 	ret = ieee80211_register_hw(mvm->hw);
676 	if (ret)
677 		iwl_mvm_leds_exit(mvm);
678 
679 	return ret;
680 }
681 
682 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
683 			     struct ieee80211_sta *sta,
684 			     struct sk_buff *skb)
685 {
686 	struct iwl_mvm_sta *mvmsta;
687 	bool defer = false;
688 
689 	/*
690 	 * double check the IN_D0I3 flag both before and after
691 	 * taking the spinlock, in order to prevent taking
692 	 * the spinlock when not needed.
693 	 */
694 	if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
695 		return false;
696 
697 	spin_lock(&mvm->d0i3_tx_lock);
698 	/*
699 	 * testing the flag again ensures the skb dequeue
700 	 * loop (on d0i3 exit) hasn't run yet.
701 	 */
702 	if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
703 		goto out;
704 
705 	mvmsta = iwl_mvm_sta_from_mac80211(sta);
706 	if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
707 	    mvmsta->sta_id != mvm->d0i3_ap_sta_id)
708 		goto out;
709 
710 	__skb_queue_tail(&mvm->d0i3_tx, skb);
711 	ieee80211_stop_queues(mvm->hw);
712 
713 	/* trigger wakeup */
714 	iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
715 	iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
716 
717 	defer = true;
718 out:
719 	spin_unlock(&mvm->d0i3_tx_lock);
720 	return defer;
721 }
722 
723 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
724 			   struct ieee80211_tx_control *control,
725 			   struct sk_buff *skb)
726 {
727 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
728 	struct ieee80211_sta *sta = control->sta;
729 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
730 	struct ieee80211_hdr *hdr = (void *)skb->data;
731 
732 	if (iwl_mvm_is_radio_killed(mvm)) {
733 		IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
734 		goto drop;
735 	}
736 
737 	if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
738 	    !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
739 	    !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
740 		goto drop;
741 
742 	/* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
743 	if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
744 		     ieee80211_is_mgmt(hdr->frame_control) &&
745 		     !ieee80211_is_deauth(hdr->frame_control) &&
746 		     !ieee80211_is_disassoc(hdr->frame_control) &&
747 		     !ieee80211_is_action(hdr->frame_control)))
748 		sta = NULL;
749 
750 	if (sta) {
751 		if (iwl_mvm_defer_tx(mvm, sta, skb))
752 			return;
753 		if (iwl_mvm_tx_skb(mvm, skb, sta))
754 			goto drop;
755 		return;
756 	}
757 
758 	if (iwl_mvm_tx_skb_non_sta(mvm, skb))
759 		goto drop;
760 	return;
761  drop:
762 	ieee80211_free_txskb(hw, skb);
763 }
764 
765 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
766 {
767 	if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
768 		return false;
769 	return true;
770 }
771 
772 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
773 {
774 	if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
775 		return false;
776 	if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
777 		return true;
778 
779 	/* enabled by default */
780 	return true;
781 }
782 
783 #define CHECK_BA_TRIGGER(_mvm, _trig, _tid_bm, _tid, _fmt...)	\
784 	do {							\
785 		if (!(le16_to_cpu(_tid_bm) & BIT(_tid)))	\
786 			break;					\
787 		iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);	\
788 	} while (0)
789 
790 static void
791 iwl_mvm_ampdu_check_trigger(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
792 			    struct ieee80211_sta *sta, u16 tid, u16 rx_ba_ssn,
793 			    enum ieee80211_ampdu_mlme_action action)
794 {
795 	struct iwl_fw_dbg_trigger_tlv *trig;
796 	struct iwl_fw_dbg_trigger_ba *ba_trig;
797 
798 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
799 		return;
800 
801 	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
802 	ba_trig = (void *)trig->data;
803 
804 	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
805 		return;
806 
807 	switch (action) {
808 	case IEEE80211_AMPDU_TX_OPERATIONAL: {
809 		struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
810 		struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
811 
812 		CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_start, tid,
813 				 "TX AGG START: MAC %pM tid %d ssn %d\n",
814 				 sta->addr, tid, tid_data->ssn);
815 		break;
816 		}
817 	case IEEE80211_AMPDU_TX_STOP_CONT:
818 		CHECK_BA_TRIGGER(mvm, trig, ba_trig->tx_ba_stop, tid,
819 				 "TX AGG STOP: MAC %pM tid %d\n",
820 				 sta->addr, tid);
821 		break;
822 	case IEEE80211_AMPDU_RX_START:
823 		CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_start, tid,
824 				 "RX AGG START: MAC %pM tid %d ssn %d\n",
825 				 sta->addr, tid, rx_ba_ssn);
826 		break;
827 	case IEEE80211_AMPDU_RX_STOP:
828 		CHECK_BA_TRIGGER(mvm, trig, ba_trig->rx_ba_stop, tid,
829 				 "RX AGG STOP: MAC %pM tid %d\n",
830 				 sta->addr, tid);
831 		break;
832 	default:
833 		break;
834 	}
835 }
836 
837 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
838 				    struct ieee80211_vif *vif,
839 				    struct ieee80211_ampdu_params *params)
840 {
841 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
842 	int ret;
843 	bool tx_agg_ref = false;
844 	struct ieee80211_sta *sta = params->sta;
845 	enum ieee80211_ampdu_mlme_action action = params->action;
846 	u16 tid = params->tid;
847 	u16 *ssn = &params->ssn;
848 	u8 buf_size = params->buf_size;
849 	bool amsdu = params->amsdu;
850 
851 	IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
852 		     sta->addr, tid, action);
853 
854 	if (!(mvm->nvm_data->sku_cap_11n_enable))
855 		return -EACCES;
856 
857 	/* return from D0i3 before starting a new Tx aggregation */
858 	switch (action) {
859 	case IEEE80211_AMPDU_TX_START:
860 	case IEEE80211_AMPDU_TX_STOP_CONT:
861 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
862 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
863 	case IEEE80211_AMPDU_TX_OPERATIONAL:
864 		/*
865 		 * for tx start, wait synchronously until D0i3 exit to
866 		 * get the correct sequence number for the tid.
867 		 * additionally, some other ampdu actions use direct
868 		 * target access, which is not handled automatically
869 		 * by the trans layer (unlike commands), so wait for
870 		 * d0i3 exit in these cases as well.
871 		 */
872 		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
873 		if (ret)
874 			return ret;
875 
876 		tx_agg_ref = true;
877 		break;
878 	default:
879 		break;
880 	}
881 
882 	mutex_lock(&mvm->mutex);
883 
884 	switch (action) {
885 	case IEEE80211_AMPDU_RX_START:
886 		if (!iwl_enable_rx_ampdu(mvm->cfg)) {
887 			ret = -EINVAL;
888 			break;
889 		}
890 		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true, buf_size);
891 		break;
892 	case IEEE80211_AMPDU_RX_STOP:
893 		ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false, buf_size);
894 		break;
895 	case IEEE80211_AMPDU_TX_START:
896 		if (!iwl_enable_tx_ampdu(mvm->cfg)) {
897 			ret = -EINVAL;
898 			break;
899 		}
900 		ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
901 		break;
902 	case IEEE80211_AMPDU_TX_STOP_CONT:
903 		ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
904 		break;
905 	case IEEE80211_AMPDU_TX_STOP_FLUSH:
906 	case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
907 		ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
908 		break;
909 	case IEEE80211_AMPDU_TX_OPERATIONAL:
910 		ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid,
911 					      buf_size, amsdu);
912 		break;
913 	default:
914 		WARN_ON_ONCE(1);
915 		ret = -EINVAL;
916 		break;
917 	}
918 
919 	if (!ret) {
920 		u16 rx_ba_ssn = 0;
921 
922 		if (action == IEEE80211_AMPDU_RX_START)
923 			rx_ba_ssn = *ssn;
924 
925 		iwl_mvm_ampdu_check_trigger(mvm, vif, sta, tid,
926 					    rx_ba_ssn, action);
927 	}
928 	mutex_unlock(&mvm->mutex);
929 
930 	/*
931 	 * If the tid is marked as started, we won't use it for offloaded
932 	 * traffic on the next D0i3 entry. It's safe to unref.
933 	 */
934 	if (tx_agg_ref)
935 		iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
936 
937 	return ret;
938 }
939 
940 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
941 				     struct ieee80211_vif *vif)
942 {
943 	struct iwl_mvm *mvm = data;
944 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
945 
946 	mvmvif->uploaded = false;
947 	mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
948 
949 	spin_lock_bh(&mvm->time_event_lock);
950 	iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
951 	spin_unlock_bh(&mvm->time_event_lock);
952 
953 	mvmvif->phy_ctxt = NULL;
954 	memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
955 }
956 
957 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
958 {
959 	/* clear the D3 reconfig, we only need it to avoid dumping a
960 	 * firmware coredump on reconfiguration, we shouldn't do that
961 	 * on D3->D0 transition
962 	 */
963 	if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
964 		mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
965 		iwl_mvm_fw_error_dump(mvm);
966 	}
967 
968 	/* cleanup all stale references (scan, roc), but keep the
969 	 * ucode_down ref until reconfig is complete
970 	 */
971 	iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
972 
973 	iwl_mvm_stop_device(mvm);
974 
975 	mvm->scan_status = 0;
976 	mvm->ps_disabled = false;
977 	mvm->calibrating = false;
978 
979 	/* just in case one was running */
980 	iwl_mvm_cleanup_roc_te(mvm);
981 	ieee80211_remain_on_channel_expired(mvm->hw);
982 
983 	/*
984 	 * cleanup all interfaces, even inactive ones, as some might have
985 	 * gone down during the HW restart
986 	 */
987 	ieee80211_iterate_interfaces(mvm->hw, 0, iwl_mvm_cleanup_iterator, mvm);
988 
989 	mvm->p2p_device_vif = NULL;
990 	mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
991 
992 	iwl_mvm_reset_phy_ctxts(mvm);
993 	memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
994 	memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
995 	memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
996 	memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
997 	memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
998 	memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
999 	memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1000 	memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1001 	memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1002 
1003 	ieee80211_wake_queues(mvm->hw);
1004 
1005 	/* clear any stale d0i3 state */
1006 	clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1007 
1008 	mvm->vif_count = 0;
1009 	mvm->rx_ba_sessions = 0;
1010 	mvm->fw_dbg_conf = FW_DBG_INVALID;
1011 
1012 	/* keep statistics ticking */
1013 	iwl_mvm_accu_radio_stats(mvm);
1014 }
1015 
1016 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1017 {
1018 	int ret;
1019 
1020 	lockdep_assert_held(&mvm->mutex);
1021 
1022 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1023 		/* Clean up some internal and mac80211 state on restart */
1024 		iwl_mvm_restart_cleanup(mvm);
1025 	} else {
1026 		/* Hold the reference to prevent runtime suspend while
1027 		 * the start procedure runs.  It's a bit confusing
1028 		 * that the UCODE_DOWN reference is taken, but it just
1029 		 * means "UCODE is not UP yet". ( TODO: rename this
1030 		 * reference).
1031 		 */
1032 		iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1033 	}
1034 	ret = iwl_mvm_up(mvm);
1035 
1036 	if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1037 		/* Something went wrong - we need to finish some cleanup
1038 		 * that normally iwl_mvm_mac_restart_complete() below
1039 		 * would do.
1040 		 */
1041 		clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1042 		iwl_mvm_d0i3_enable_tx(mvm, NULL);
1043 	}
1044 
1045 	return ret;
1046 }
1047 
1048 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1049 {
1050 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1051 	int ret;
1052 
1053 	/* Some hw restart cleanups must not hold the mutex */
1054 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1055 		/*
1056 		 * Make sure we are out of d0i3. This is needed
1057 		 * to make sure the reference accounting is correct
1058 		 * (and there is no stale d0i3_exit_work).
1059 		 */
1060 		wait_event_timeout(mvm->d0i3_exit_waitq,
1061 				   !test_bit(IWL_MVM_STATUS_IN_D0I3,
1062 					     &mvm->status),
1063 				   HZ);
1064 	}
1065 
1066 	mutex_lock(&mvm->mutex);
1067 	ret = __iwl_mvm_mac_start(mvm);
1068 	mutex_unlock(&mvm->mutex);
1069 
1070 	return ret;
1071 }
1072 
1073 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1074 {
1075 	int ret;
1076 
1077 	mutex_lock(&mvm->mutex);
1078 
1079 	clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1080 	iwl_mvm_d0i3_enable_tx(mvm, NULL);
1081 	ret = iwl_mvm_update_quotas(mvm, true, NULL);
1082 	if (ret)
1083 		IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1084 			ret);
1085 
1086 	/* allow transport/FW low power modes */
1087 	iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1088 
1089 	/*
1090 	 * If we have TDLS peers, remove them. We don't know the last seqno/PN
1091 	 * of packets the FW sent out, so we must reconnect.
1092 	 */
1093 	iwl_mvm_teardown_tdls_peers(mvm);
1094 
1095 	mutex_unlock(&mvm->mutex);
1096 }
1097 
1098 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1099 {
1100 	if (iwl_mvm_is_d0i3_supported(mvm) &&
1101 	    iwl_mvm_enter_d0i3_on_suspend(mvm))
1102 		WARN_ONCE(!wait_event_timeout(mvm->d0i3_exit_waitq,
1103 					      !test_bit(IWL_MVM_STATUS_IN_D0I3,
1104 							&mvm->status),
1105 					      HZ),
1106 			  "D0i3 exit on resume timed out\n");
1107 }
1108 
1109 static void
1110 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1111 			      enum ieee80211_reconfig_type reconfig_type)
1112 {
1113 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1114 
1115 	switch (reconfig_type) {
1116 	case IEEE80211_RECONFIG_TYPE_RESTART:
1117 		iwl_mvm_restart_complete(mvm);
1118 		break;
1119 	case IEEE80211_RECONFIG_TYPE_SUSPEND:
1120 		iwl_mvm_resume_complete(mvm);
1121 		break;
1122 	}
1123 }
1124 
1125 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1126 {
1127 	lockdep_assert_held(&mvm->mutex);
1128 
1129 	/* firmware counters are obviously reset now, but we shouldn't
1130 	 * partially track so also clear the fw_reset_accu counters.
1131 	 */
1132 	memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1133 
1134 	/* async_handlers_wk is now blocked */
1135 
1136 	/*
1137 	 * The work item could be running or queued if the
1138 	 * ROC time event stops just as we get here.
1139 	 */
1140 	flush_work(&mvm->roc_done_wk);
1141 
1142 	iwl_mvm_stop_device(mvm);
1143 
1144 	iwl_mvm_async_handlers_purge(mvm);
1145 	/* async_handlers_list is empty and will stay empty: HW is stopped */
1146 
1147 	/* the fw is stopped, the aux sta is dead: clean up driver state */
1148 	iwl_mvm_del_aux_sta(mvm);
1149 
1150 	iwl_free_fw_paging(mvm);
1151 
1152 	/*
1153 	 * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1154 	 * won't be called in this case).
1155 	 * But make sure to cleanup interfaces that have gone down before/during
1156 	 * HW restart was requested.
1157 	 */
1158 	if (test_and_clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1159 		ieee80211_iterate_interfaces(mvm->hw, 0,
1160 					     iwl_mvm_cleanup_iterator, mvm);
1161 
1162 	/* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1163 	 * make sure there's nothing left there and warn if any is found.
1164 	 */
1165 	if (fw_has_capa(&mvm->fw->ucode_capa, IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1166 		int i;
1167 
1168 		for (i = 0; i < mvm->max_scans; i++) {
1169 			if (WARN_ONCE(mvm->scan_uid_status[i],
1170 				      "UMAC scan UID %d status was not cleaned\n",
1171 				      i))
1172 				mvm->scan_uid_status[i] = 0;
1173 		}
1174 	}
1175 }
1176 
1177 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1178 {
1179 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1180 
1181 	flush_work(&mvm->d0i3_exit_work);
1182 	flush_work(&mvm->async_handlers_wk);
1183 	cancel_delayed_work_sync(&mvm->fw_dump_wk);
1184 	iwl_mvm_free_fw_dump_desc(mvm);
1185 
1186 	mutex_lock(&mvm->mutex);
1187 	__iwl_mvm_mac_stop(mvm);
1188 	mutex_unlock(&mvm->mutex);
1189 
1190 	/*
1191 	 * The worker might have been waiting for the mutex, let it run and
1192 	 * discover that its list is now empty.
1193 	 */
1194 	cancel_work_sync(&mvm->async_handlers_wk);
1195 }
1196 
1197 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1198 {
1199 	u16 i;
1200 
1201 	lockdep_assert_held(&mvm->mutex);
1202 
1203 	for (i = 0; i < NUM_PHY_CTX; i++)
1204 		if (!mvm->phy_ctxts[i].ref)
1205 			return &mvm->phy_ctxts[i];
1206 
1207 	IWL_ERR(mvm, "No available PHY context\n");
1208 	return NULL;
1209 }
1210 
1211 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1212 				s16 tx_power)
1213 {
1214 	struct iwl_dev_tx_power_cmd cmd = {
1215 		.v2.set_mode = cpu_to_le32(IWL_TX_POWER_MODE_SET_MAC),
1216 		.v2.mac_context_id =
1217 			cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1218 		.v2.pwr_restriction = cpu_to_le16(8 * tx_power),
1219 	};
1220 	int len = sizeof(cmd);
1221 
1222 	if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1223 		cmd.v2.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1224 
1225 	if (!fw_has_api(&mvm->fw->ucode_capa, IWL_UCODE_TLV_API_TX_POWER_CHAIN))
1226 		len = sizeof(cmd.v2);
1227 
1228 	return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0, len, &cmd);
1229 }
1230 
1231 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1232 				     struct ieee80211_vif *vif)
1233 {
1234 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1235 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1236 	int ret;
1237 
1238 	mvmvif->mvm = mvm;
1239 
1240 	/*
1241 	 * make sure D0i3 exit is completed, otherwise a target access
1242 	 * during tx queue configuration could be done when still in
1243 	 * D0i3 state.
1244 	 */
1245 	ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1246 	if (ret)
1247 		return ret;
1248 
1249 	/*
1250 	 * Not much to do here. The stack will not allow interface
1251 	 * types or combinations that we didn't advertise, so we
1252 	 * don't really have to check the types.
1253 	 */
1254 
1255 	mutex_lock(&mvm->mutex);
1256 
1257 	/* make sure that beacon statistics don't go backwards with FW reset */
1258 	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1259 		mvmvif->beacon_stats.accu_num_beacons +=
1260 			mvmvif->beacon_stats.num_beacons;
1261 
1262 	/* Allocate resources for the MAC context, and add it to the fw  */
1263 	ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1264 	if (ret)
1265 		goto out_unlock;
1266 
1267 	/* Counting number of interfaces is needed for legacy PM */
1268 	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1269 		mvm->vif_count++;
1270 
1271 	/*
1272 	 * The AP binding flow can be done only after the beacon
1273 	 * template is configured (which happens only in the mac80211
1274 	 * start_ap() flow), and adding the broadcast station can happen
1275 	 * only after the binding.
1276 	 * In addition, since modifying the MAC before adding a bcast
1277 	 * station is not allowed by the FW, delay the adding of MAC context to
1278 	 * the point where we can also add the bcast station.
1279 	 * In short: there's not much we can do at this point, other than
1280 	 * allocating resources :)
1281 	 */
1282 	if (vif->type == NL80211_IFTYPE_AP ||
1283 	    vif->type == NL80211_IFTYPE_ADHOC) {
1284 		ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1285 		if (ret) {
1286 			IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1287 			goto out_release;
1288 		}
1289 
1290 		iwl_mvm_vif_dbgfs_register(mvm, vif);
1291 		goto out_unlock;
1292 	}
1293 
1294 	mvmvif->features |= hw->netdev_features;
1295 
1296 	ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1297 	if (ret)
1298 		goto out_release;
1299 
1300 	ret = iwl_mvm_power_update_mac(mvm);
1301 	if (ret)
1302 		goto out_remove_mac;
1303 
1304 	/* beacon filtering */
1305 	ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1306 	if (ret)
1307 		goto out_remove_mac;
1308 
1309 	if (!mvm->bf_allowed_vif &&
1310 	    vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1311 		mvm->bf_allowed_vif = mvmvif;
1312 		vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1313 				     IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1314 	}
1315 
1316 	/*
1317 	 * P2P_DEVICE interface does not have a channel context assigned to it,
1318 	 * so a dedicated PHY context is allocated to it and the corresponding
1319 	 * MAC context is bound to it at this stage.
1320 	 */
1321 	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1322 
1323 		mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1324 		if (!mvmvif->phy_ctxt) {
1325 			ret = -ENOSPC;
1326 			goto out_free_bf;
1327 		}
1328 
1329 		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1330 		ret = iwl_mvm_binding_add_vif(mvm, vif);
1331 		if (ret)
1332 			goto out_unref_phy;
1333 
1334 		ret = iwl_mvm_add_bcast_sta(mvm, vif);
1335 		if (ret)
1336 			goto out_unbind;
1337 
1338 		/* Save a pointer to p2p device vif, so it can later be used to
1339 		 * update the p2p device MAC when a GO is started/stopped */
1340 		mvm->p2p_device_vif = vif;
1341 	}
1342 
1343 	iwl_mvm_vif_dbgfs_register(mvm, vif);
1344 	goto out_unlock;
1345 
1346  out_unbind:
1347 	iwl_mvm_binding_remove_vif(mvm, vif);
1348  out_unref_phy:
1349 	iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1350  out_free_bf:
1351 	if (mvm->bf_allowed_vif == mvmvif) {
1352 		mvm->bf_allowed_vif = NULL;
1353 		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1354 				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1355 	}
1356  out_remove_mac:
1357 	mvmvif->phy_ctxt = NULL;
1358 	iwl_mvm_mac_ctxt_remove(mvm, vif);
1359  out_release:
1360 	if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1361 		mvm->vif_count--;
1362 
1363 	iwl_mvm_mac_ctxt_release(mvm, vif);
1364  out_unlock:
1365 	mutex_unlock(&mvm->mutex);
1366 
1367 	iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1368 
1369 	return ret;
1370 }
1371 
1372 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1373 					struct ieee80211_vif *vif)
1374 {
1375 	u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1376 
1377 	if (tfd_msk) {
1378 		/*
1379 		 * mac80211 first removes all the stations of the vif and
1380 		 * then removes the vif. When it removes a station it also
1381 		 * flushes the AMPDU session. So by now, all the AMPDU sessions
1382 		 * of all the stations of this vif are closed, and the queues
1383 		 * of these AMPDU sessions are properly closed.
1384 		 * We still need to take care of the shared queues of the vif.
1385 		 * Flush them here.
1386 		 */
1387 		mutex_lock(&mvm->mutex);
1388 		iwl_mvm_flush_tx_path(mvm, tfd_msk, 0);
1389 		mutex_unlock(&mvm->mutex);
1390 
1391 		/*
1392 		 * There are transports that buffer a few frames in the host.
1393 		 * For these, the flush above isn't enough since while we were
1394 		 * flushing, the transport might have sent more frames to the
1395 		 * device. To solve this, wait here until the transport is
1396 		 * empty. Technically, this could have replaced the flush
1397 		 * above, but flush is much faster than draining. So flush
1398 		 * first, and drain to make sure we have no frames in the
1399 		 * transport anymore.
1400 		 * If a station still had frames on the shared queues, it is
1401 		 * already marked as draining, so to complete the draining, we
1402 		 * just need to wait until the transport is empty.
1403 		 */
1404 		iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1405 	}
1406 
1407 	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1408 		/*
1409 		 * Flush the ROC worker which will flush the OFFCHANNEL queue.
1410 		 * We assume here that all the packets sent to the OFFCHANNEL
1411 		 * queue are sent in ROC session.
1412 		 */
1413 		flush_work(&mvm->roc_done_wk);
1414 	} else {
1415 		/*
1416 		 * By now, all the AC queues are empty. The AGG queues are
1417 		 * empty too. We already got all the Tx responses for all the
1418 		 * packets in the queues. The drain work can have been
1419 		 * triggered. Flush it.
1420 		 */
1421 		flush_work(&mvm->sta_drained_wk);
1422 	}
1423 }
1424 
1425 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1426 					 struct ieee80211_vif *vif)
1427 {
1428 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1429 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1430 
1431 	iwl_mvm_prepare_mac_removal(mvm, vif);
1432 
1433 	mutex_lock(&mvm->mutex);
1434 
1435 	if (mvm->bf_allowed_vif == mvmvif) {
1436 		mvm->bf_allowed_vif = NULL;
1437 		vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1438 				       IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1439 	}
1440 
1441 	iwl_mvm_vif_dbgfs_clean(mvm, vif);
1442 
1443 	/*
1444 	 * For AP/GO interface, the tear down of the resources allocated to the
1445 	 * interface is be handled as part of the stop_ap flow.
1446 	 */
1447 	if (vif->type == NL80211_IFTYPE_AP ||
1448 	    vif->type == NL80211_IFTYPE_ADHOC) {
1449 #ifdef CONFIG_NL80211_TESTMODE
1450 		if (vif == mvm->noa_vif) {
1451 			mvm->noa_vif = NULL;
1452 			mvm->noa_duration = 0;
1453 		}
1454 #endif
1455 		iwl_mvm_dealloc_bcast_sta(mvm, vif);
1456 		goto out_release;
1457 	}
1458 
1459 	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1460 		mvm->p2p_device_vif = NULL;
1461 		iwl_mvm_rm_bcast_sta(mvm, vif);
1462 		iwl_mvm_binding_remove_vif(mvm, vif);
1463 		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1464 		mvmvif->phy_ctxt = NULL;
1465 	}
1466 
1467 	if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1468 		mvm->vif_count--;
1469 
1470 	iwl_mvm_power_update_mac(mvm);
1471 	iwl_mvm_mac_ctxt_remove(mvm, vif);
1472 
1473 out_release:
1474 	iwl_mvm_mac_ctxt_release(mvm, vif);
1475 	mutex_unlock(&mvm->mutex);
1476 }
1477 
1478 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1479 {
1480 	return 0;
1481 }
1482 
1483 struct iwl_mvm_mc_iter_data {
1484 	struct iwl_mvm *mvm;
1485 	int port_id;
1486 };
1487 
1488 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1489 				      struct ieee80211_vif *vif)
1490 {
1491 	struct iwl_mvm_mc_iter_data *data = _data;
1492 	struct iwl_mvm *mvm = data->mvm;
1493 	struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1494 	int ret, len;
1495 
1496 	/* if we don't have free ports, mcast frames will be dropped */
1497 	if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1498 		return;
1499 
1500 	if (vif->type != NL80211_IFTYPE_STATION ||
1501 	    !vif->bss_conf.assoc)
1502 		return;
1503 
1504 	cmd->port_id = data->port_id++;
1505 	memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1506 	len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1507 
1508 	ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1509 	if (ret)
1510 		IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1511 }
1512 
1513 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1514 {
1515 	struct iwl_mvm_mc_iter_data iter_data = {
1516 		.mvm = mvm,
1517 	};
1518 
1519 	lockdep_assert_held(&mvm->mutex);
1520 
1521 	if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1522 		return;
1523 
1524 	ieee80211_iterate_active_interfaces_atomic(
1525 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1526 		iwl_mvm_mc_iface_iterator, &iter_data);
1527 }
1528 
1529 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1530 				     struct netdev_hw_addr_list *mc_list)
1531 {
1532 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1533 	struct iwl_mcast_filter_cmd *cmd;
1534 	struct netdev_hw_addr *addr;
1535 	int addr_count;
1536 	bool pass_all;
1537 	int len;
1538 
1539 	addr_count = netdev_hw_addr_list_count(mc_list);
1540 	pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1541 		   IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1542 	if (pass_all)
1543 		addr_count = 0;
1544 
1545 	len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1546 	cmd = kzalloc(len, GFP_ATOMIC);
1547 	if (!cmd)
1548 		return 0;
1549 
1550 	if (pass_all) {
1551 		cmd->pass_all = 1;
1552 		return (u64)(unsigned long)cmd;
1553 	}
1554 
1555 	netdev_hw_addr_list_for_each(addr, mc_list) {
1556 		IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1557 				   cmd->count, addr->addr);
1558 		memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1559 		       addr->addr, ETH_ALEN);
1560 		cmd->count++;
1561 	}
1562 
1563 	return (u64)(unsigned long)cmd;
1564 }
1565 
1566 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1567 				     unsigned int changed_flags,
1568 				     unsigned int *total_flags,
1569 				     u64 multicast)
1570 {
1571 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1572 	struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1573 
1574 	mutex_lock(&mvm->mutex);
1575 
1576 	/* replace previous configuration */
1577 	kfree(mvm->mcast_filter_cmd);
1578 	mvm->mcast_filter_cmd = cmd;
1579 
1580 	if (!cmd)
1581 		goto out;
1582 
1583 	iwl_mvm_recalc_multicast(mvm);
1584 out:
1585 	mutex_unlock(&mvm->mutex);
1586 	*total_flags = 0;
1587 }
1588 
1589 static void iwl_mvm_config_iface_filter(struct ieee80211_hw *hw,
1590 					struct ieee80211_vif *vif,
1591 					unsigned int filter_flags,
1592 					unsigned int changed_flags)
1593 {
1594 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1595 
1596 	/* We support only filter for probe requests */
1597 	if (!(changed_flags & FIF_PROBE_REQ))
1598 		return;
1599 
1600 	/* Supported only for p2p client interfaces */
1601 	if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc ||
1602 	    !vif->p2p)
1603 		return;
1604 
1605 	mutex_lock(&mvm->mutex);
1606 	iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1607 	mutex_unlock(&mvm->mutex);
1608 }
1609 
1610 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1611 struct iwl_bcast_iter_data {
1612 	struct iwl_mvm *mvm;
1613 	struct iwl_bcast_filter_cmd *cmd;
1614 	u8 current_filter;
1615 };
1616 
1617 static void
1618 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1619 			 const struct iwl_fw_bcast_filter *in_filter,
1620 			 struct iwl_fw_bcast_filter *out_filter)
1621 {
1622 	struct iwl_fw_bcast_filter_attr *attr;
1623 	int i;
1624 
1625 	memcpy(out_filter, in_filter, sizeof(*out_filter));
1626 
1627 	for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1628 		attr = &out_filter->attrs[i];
1629 
1630 		if (!attr->mask)
1631 			break;
1632 
1633 		switch (attr->reserved1) {
1634 		case cpu_to_le16(BC_FILTER_MAGIC_IP):
1635 			if (vif->bss_conf.arp_addr_cnt != 1) {
1636 				attr->mask = 0;
1637 				continue;
1638 			}
1639 
1640 			attr->val = vif->bss_conf.arp_addr_list[0];
1641 			break;
1642 		case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1643 			attr->val = *(__be32 *)&vif->addr[2];
1644 			break;
1645 		default:
1646 			break;
1647 		}
1648 		attr->reserved1 = 0;
1649 		out_filter->num_attrs++;
1650 	}
1651 }
1652 
1653 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1654 					  struct ieee80211_vif *vif)
1655 {
1656 	struct iwl_bcast_iter_data *data = _data;
1657 	struct iwl_mvm *mvm = data->mvm;
1658 	struct iwl_bcast_filter_cmd *cmd = data->cmd;
1659 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1660 	struct iwl_fw_bcast_mac *bcast_mac;
1661 	int i;
1662 
1663 	if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1664 		return;
1665 
1666 	bcast_mac = &cmd->macs[mvmvif->id];
1667 
1668 	/*
1669 	 * enable filtering only for associated stations, but not for P2P
1670 	 * Clients
1671 	 */
1672 	if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1673 	    !vif->bss_conf.assoc)
1674 		return;
1675 
1676 	bcast_mac->default_discard = 1;
1677 
1678 	/* copy all configured filters */
1679 	for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1680 		/*
1681 		 * Make sure we don't exceed our filters limit.
1682 		 * if there is still a valid filter to be configured,
1683 		 * be on the safe side and just allow bcast for this mac.
1684 		 */
1685 		if (WARN_ON_ONCE(data->current_filter >=
1686 				 ARRAY_SIZE(cmd->filters))) {
1687 			bcast_mac->default_discard = 0;
1688 			bcast_mac->attached_filters = 0;
1689 			break;
1690 		}
1691 
1692 		iwl_mvm_set_bcast_filter(vif,
1693 					 &mvm->bcast_filters[i],
1694 					 &cmd->filters[data->current_filter]);
1695 
1696 		/* skip current filter if it contains no attributes */
1697 		if (!cmd->filters[data->current_filter].num_attrs)
1698 			continue;
1699 
1700 		/* attach the filter to current mac */
1701 		bcast_mac->attached_filters |=
1702 				cpu_to_le16(BIT(data->current_filter));
1703 
1704 		data->current_filter++;
1705 	}
1706 }
1707 
1708 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1709 				    struct iwl_bcast_filter_cmd *cmd)
1710 {
1711 	struct iwl_bcast_iter_data iter_data = {
1712 		.mvm = mvm,
1713 		.cmd = cmd,
1714 	};
1715 
1716 	if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1717 		return false;
1718 
1719 	memset(cmd, 0, sizeof(*cmd));
1720 	cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1721 	cmd->max_macs = ARRAY_SIZE(cmd->macs);
1722 
1723 #ifdef CONFIG_IWLWIFI_DEBUGFS
1724 	/* use debugfs filters/macs if override is configured */
1725 	if (mvm->dbgfs_bcast_filtering.override) {
1726 		memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1727 		       sizeof(cmd->filters));
1728 		memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1729 		       sizeof(cmd->macs));
1730 		return true;
1731 	}
1732 #endif
1733 
1734 	/* if no filters are configured, do nothing */
1735 	if (!mvm->bcast_filters)
1736 		return false;
1737 
1738 	/* configure and attach these filters for each associated sta vif */
1739 	ieee80211_iterate_active_interfaces(
1740 		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1741 		iwl_mvm_bcast_filter_iterator, &iter_data);
1742 
1743 	return true;
1744 }
1745 
1746 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1747 {
1748 	struct iwl_bcast_filter_cmd cmd;
1749 
1750 	if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1751 		return 0;
1752 
1753 	if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1754 		return 0;
1755 
1756 	return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1757 				    sizeof(cmd), &cmd);
1758 }
1759 #else
1760 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm)
1761 {
1762 	return 0;
1763 }
1764 #endif
1765 
1766 static int iwl_mvm_update_mu_groups(struct iwl_mvm *mvm,
1767 				    struct ieee80211_vif *vif)
1768 {
1769 	struct iwl_mu_group_mgmt_cmd cmd = {};
1770 
1771 	memcpy(cmd.membership_status, vif->bss_conf.mu_group.membership,
1772 	       WLAN_MEMBERSHIP_LEN);
1773 	memcpy(cmd.user_position, vif->bss_conf.mu_group.position,
1774 	       WLAN_USER_POSITION_LEN);
1775 
1776 	return iwl_mvm_send_cmd_pdu(mvm,
1777 				    WIDE_ID(DATA_PATH_GROUP,
1778 					    UPDATE_MU_GROUPS_CMD),
1779 				    0, sizeof(cmd), &cmd);
1780 }
1781 
1782 static void iwl_mvm_mu_mimo_iface_iterator(void *_data, u8 *mac,
1783 					   struct ieee80211_vif *vif)
1784 {
1785 	if (vif->mu_mimo_owner) {
1786 		struct iwl_mu_group_mgmt_notif *notif = _data;
1787 
1788 		/*
1789 		 * MU-MIMO Group Id action frame is little endian. We treat
1790 		 * the data received from firmware as if it came from the
1791 		 * action frame, so no conversion is needed.
1792 		 */
1793 		ieee80211_update_mu_groups(vif,
1794 					   (u8 *)&notif->membership_status,
1795 					   (u8 *)&notif->user_position);
1796 	}
1797 }
1798 
1799 void iwl_mvm_mu_mimo_grp_notif(struct iwl_mvm *mvm,
1800 			       struct iwl_rx_cmd_buffer *rxb)
1801 {
1802 	struct iwl_rx_packet *pkt = rxb_addr(rxb);
1803 	struct iwl_mu_group_mgmt_notif *notif = (void *)pkt->data;
1804 
1805 	ieee80211_iterate_active_interfaces_atomic(
1806 			mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1807 			iwl_mvm_mu_mimo_iface_iterator, notif);
1808 }
1809 
1810 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1811 					     struct ieee80211_vif *vif,
1812 					     struct ieee80211_bss_conf *bss_conf,
1813 					     u32 changes)
1814 {
1815 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1816 	int ret;
1817 
1818 	/*
1819 	 * Re-calculate the tsf id, as the master-slave relations depend on the
1820 	 * beacon interval, which was not known when the station interface was
1821 	 * added.
1822 	 */
1823 	if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1824 		iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1825 
1826 	/*
1827 	 * If we're not associated yet, take the (new) BSSID before associating
1828 	 * so the firmware knows. If we're already associated, then use the old
1829 	 * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1830 	 * branch for disassociation below.
1831 	 */
1832 	if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1833 		memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1834 
1835 	ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1836 	if (ret)
1837 		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1838 
1839 	/* after sending it once, adopt mac80211 data */
1840 	memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1841 	mvmvif->associated = bss_conf->assoc;
1842 
1843 	if (changes & BSS_CHANGED_ASSOC) {
1844 		if (bss_conf->assoc) {
1845 			/* clear statistics to get clean beacon counter */
1846 			iwl_mvm_request_statistics(mvm, true);
1847 			memset(&mvmvif->beacon_stats, 0,
1848 			       sizeof(mvmvif->beacon_stats));
1849 
1850 			/* add quota for this interface */
1851 			ret = iwl_mvm_update_quotas(mvm, true, NULL);
1852 			if (ret) {
1853 				IWL_ERR(mvm, "failed to update quotas\n");
1854 				return;
1855 			}
1856 
1857 			if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1858 				     &mvm->status)) {
1859 				/*
1860 				 * If we're restarting then the firmware will
1861 				 * obviously have lost synchronisation with
1862 				 * the AP. It will attempt to synchronise by
1863 				 * itself, but we can make it more reliable by
1864 				 * scheduling a session protection time event.
1865 				 *
1866 				 * The firmware needs to receive a beacon to
1867 				 * catch up with synchronisation, use 110% of
1868 				 * the beacon interval.
1869 				 *
1870 				 * Set a large maximum delay to allow for more
1871 				 * than a single interface.
1872 				 */
1873 				u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1874 				iwl_mvm_protect_session(mvm, vif, dur, dur,
1875 							5 * dur, false);
1876 			}
1877 
1878 			iwl_mvm_sf_update(mvm, vif, false);
1879 			iwl_mvm_power_vif_assoc(mvm, vif);
1880 			if (vif->p2p) {
1881 				iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1882 				iwl_mvm_update_smps(mvm, vif,
1883 						    IWL_MVM_SMPS_REQ_PROT,
1884 						    IEEE80211_SMPS_DYNAMIC);
1885 			}
1886 		} else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1887 			/*
1888 			 * If update fails - SF might be running in associated
1889 			 * mode while disassociated - which is forbidden.
1890 			 */
1891 			WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1892 				  "Failed to update SF upon disassociation\n");
1893 
1894 			/* remove AP station now that the MAC is unassoc */
1895 			ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1896 			if (ret)
1897 				IWL_ERR(mvm, "failed to remove AP station\n");
1898 
1899 			if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1900 				mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1901 			mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1902 			/* remove quota for this interface */
1903 			ret = iwl_mvm_update_quotas(mvm, false, NULL);
1904 			if (ret)
1905 				IWL_ERR(mvm, "failed to update quotas\n");
1906 
1907 			if (vif->p2p)
1908 				iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1909 
1910 			/* this will take the cleared BSSID from bss_conf */
1911 			ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1912 			if (ret)
1913 				IWL_ERR(mvm,
1914 					"failed to update MAC %pM (clear after unassoc)\n",
1915 					vif->addr);
1916 		}
1917 
1918 		/*
1919 		 * The firmware tracks the MU-MIMO group on its own.
1920 		 * However, on HW restart we should restore this data.
1921 		 */
1922 		if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
1923 		    (changes & BSS_CHANGED_MU_GROUPS) && vif->mu_mimo_owner) {
1924 			ret = iwl_mvm_update_mu_groups(mvm, vif);
1925 			if (ret)
1926 				IWL_ERR(mvm,
1927 					"failed to update VHT MU_MIMO groups\n");
1928 		}
1929 
1930 		iwl_mvm_recalc_multicast(mvm);
1931 		iwl_mvm_configure_bcast_filter(mvm);
1932 
1933 		/* reset rssi values */
1934 		mvmvif->bf_data.ave_beacon_signal = 0;
1935 
1936 		iwl_mvm_bt_coex_vif_change(mvm);
1937 		iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1938 				    IEEE80211_SMPS_AUTOMATIC);
1939 		if (fw_has_capa(&mvm->fw->ucode_capa,
1940 				IWL_UCODE_TLV_CAPA_UMAC_SCAN))
1941 			iwl_mvm_config_scan(mvm);
1942 	} else if (changes & BSS_CHANGED_BEACON_INFO) {
1943 		/*
1944 		 * We received a beacon _after_ association so
1945 		 * remove the session protection.
1946 		 */
1947 		iwl_mvm_remove_time_event(mvm, mvmvif,
1948 					  &mvmvif->time_event_data);
1949 	}
1950 
1951 	if (changes & BSS_CHANGED_BEACON_INFO) {
1952 		iwl_mvm_sf_update(mvm, vif, false);
1953 		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1954 	}
1955 
1956 	if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS |
1957 		       /*
1958 			* Send power command on every beacon change,
1959 			* because we may have not enabled beacon abort yet.
1960 			*/
1961 		       BSS_CHANGED_BEACON_INFO)) {
1962 		ret = iwl_mvm_power_update_mac(mvm);
1963 		if (ret)
1964 			IWL_ERR(mvm, "failed to update power mode\n");
1965 	}
1966 
1967 	if (changes & BSS_CHANGED_TXPOWER) {
1968 		IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1969 				bss_conf->txpower);
1970 		iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1971 	}
1972 
1973 	if (changes & BSS_CHANGED_CQM) {
1974 		IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1975 		/* reset cqm events tracking */
1976 		mvmvif->bf_data.last_cqm_event = 0;
1977 		if (mvmvif->bf_data.bf_enabled) {
1978 			ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1979 			if (ret)
1980 				IWL_ERR(mvm,
1981 					"failed to update CQM thresholds\n");
1982 		}
1983 	}
1984 
1985 	if (changes & BSS_CHANGED_ARP_FILTER) {
1986 		IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1987 		iwl_mvm_configure_bcast_filter(mvm);
1988 	}
1989 }
1990 
1991 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1992 				 struct ieee80211_vif *vif)
1993 {
1994 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1995 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1996 	int ret;
1997 
1998 	/*
1999 	 * iwl_mvm_mac_ctxt_add() might read directly from the device
2000 	 * (the system time), so make sure it is available.
2001 	 */
2002 	ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2003 	if (ret)
2004 		return ret;
2005 
2006 	mutex_lock(&mvm->mutex);
2007 
2008 	/* Send the beacon template */
2009 	ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2010 	if (ret)
2011 		goto out_unlock;
2012 
2013 	/*
2014 	 * Re-calculate the tsf id, as the master-slave relations depend on the
2015 	 * beacon interval, which was not known when the AP interface was added.
2016 	 */
2017 	if (vif->type == NL80211_IFTYPE_AP)
2018 		iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2019 
2020 	mvmvif->ap_assoc_sta_count = 0;
2021 
2022 	/* Add the mac context */
2023 	ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2024 	if (ret)
2025 		goto out_unlock;
2026 
2027 	/* Perform the binding */
2028 	ret = iwl_mvm_binding_add_vif(mvm, vif);
2029 	if (ret)
2030 		goto out_remove;
2031 
2032 	/* Send the bcast station. At this stage the TBTT and DTIM time events
2033 	 * are added and applied to the scheduler */
2034 	ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2035 	if (ret)
2036 		goto out_unbind;
2037 
2038 	/* must be set before quota calculations */
2039 	mvmvif->ap_ibss_active = true;
2040 
2041 	/* power updated needs to be done before quotas */
2042 	iwl_mvm_power_update_mac(mvm);
2043 
2044 	ret = iwl_mvm_update_quotas(mvm, false, NULL);
2045 	if (ret)
2046 		goto out_quota_failed;
2047 
2048 	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2049 	if (vif->p2p && mvm->p2p_device_vif)
2050 		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2051 
2052 	iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2053 
2054 	iwl_mvm_bt_coex_vif_change(mvm);
2055 
2056 	/* we don't support TDLS during DCM */
2057 	if (iwl_mvm_phy_ctx_count(mvm) > 1)
2058 		iwl_mvm_teardown_tdls_peers(mvm);
2059 
2060 	goto out_unlock;
2061 
2062 out_quota_failed:
2063 	iwl_mvm_power_update_mac(mvm);
2064 	mvmvif->ap_ibss_active = false;
2065 	iwl_mvm_send_rm_bcast_sta(mvm, vif);
2066 out_unbind:
2067 	iwl_mvm_binding_remove_vif(mvm, vif);
2068 out_remove:
2069 	iwl_mvm_mac_ctxt_remove(mvm, vif);
2070 out_unlock:
2071 	mutex_unlock(&mvm->mutex);
2072 	iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2073 	return ret;
2074 }
2075 
2076 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2077 				 struct ieee80211_vif *vif)
2078 {
2079 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2080 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2081 
2082 	iwl_mvm_prepare_mac_removal(mvm, vif);
2083 
2084 	mutex_lock(&mvm->mutex);
2085 
2086 	/* Handle AP stop while in CSA */
2087 	if (rcu_access_pointer(mvm->csa_vif) == vif) {
2088 		iwl_mvm_remove_time_event(mvm, mvmvif,
2089 					  &mvmvif->time_event_data);
2090 		RCU_INIT_POINTER(mvm->csa_vif, NULL);
2091 		mvmvif->csa_countdown = false;
2092 	}
2093 
2094 	if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2095 		RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2096 		mvm->csa_tx_block_bcn_timeout = 0;
2097 	}
2098 
2099 	mvmvif->ap_ibss_active = false;
2100 	mvm->ap_last_beacon_gp2 = 0;
2101 
2102 	iwl_mvm_bt_coex_vif_change(mvm);
2103 
2104 	iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2105 
2106 	/* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2107 	if (vif->p2p && mvm->p2p_device_vif)
2108 		iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2109 
2110 	iwl_mvm_update_quotas(mvm, false, NULL);
2111 	iwl_mvm_send_rm_bcast_sta(mvm, vif);
2112 	iwl_mvm_binding_remove_vif(mvm, vif);
2113 
2114 	iwl_mvm_power_update_mac(mvm);
2115 
2116 	iwl_mvm_mac_ctxt_remove(mvm, vif);
2117 
2118 	mutex_unlock(&mvm->mutex);
2119 }
2120 
2121 static void
2122 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2123 				 struct ieee80211_vif *vif,
2124 				 struct ieee80211_bss_conf *bss_conf,
2125 				 u32 changes)
2126 {
2127 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2128 
2129 	/* Changes will be applied when the AP/IBSS is started */
2130 	if (!mvmvif->ap_ibss_active)
2131 		return;
2132 
2133 	if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2134 		       BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2135 	    iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2136 		IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2137 
2138 	/* Need to send a new beacon template to the FW */
2139 	if (changes & BSS_CHANGED_BEACON &&
2140 	    iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2141 		IWL_WARN(mvm, "Failed updating beacon data\n");
2142 
2143 	if (changes & BSS_CHANGED_TXPOWER) {
2144 		IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2145 				bss_conf->txpower);
2146 		iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2147 	}
2148 }
2149 
2150 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2151 				     struct ieee80211_vif *vif,
2152 				     struct ieee80211_bss_conf *bss_conf,
2153 				     u32 changes)
2154 {
2155 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2156 
2157 	/*
2158 	 * iwl_mvm_bss_info_changed_station() might call
2159 	 * iwl_mvm_protect_session(), which reads directly from
2160 	 * the device (the system time), so make sure it is available.
2161 	 */
2162 	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2163 		return;
2164 
2165 	mutex_lock(&mvm->mutex);
2166 
2167 	if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2168 		iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, true);
2169 
2170 	switch (vif->type) {
2171 	case NL80211_IFTYPE_STATION:
2172 		iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2173 		break;
2174 	case NL80211_IFTYPE_AP:
2175 	case NL80211_IFTYPE_ADHOC:
2176 		iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2177 		break;
2178 	default:
2179 		/* shouldn't happen */
2180 		WARN_ON_ONCE(1);
2181 	}
2182 
2183 	mutex_unlock(&mvm->mutex);
2184 	iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2185 }
2186 
2187 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2188 			       struct ieee80211_vif *vif,
2189 			       struct ieee80211_scan_request *hw_req)
2190 {
2191 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2192 	int ret;
2193 
2194 	if (hw_req->req.n_channels == 0 ||
2195 	    hw_req->req.n_channels > mvm->fw->ucode_capa.n_scan_channels)
2196 		return -EINVAL;
2197 
2198 	mutex_lock(&mvm->mutex);
2199 	ret = iwl_mvm_reg_scan_start(mvm, vif, &hw_req->req, &hw_req->ies);
2200 	mutex_unlock(&mvm->mutex);
2201 
2202 	return ret;
2203 }
2204 
2205 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2206 				       struct ieee80211_vif *vif)
2207 {
2208 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2209 
2210 	mutex_lock(&mvm->mutex);
2211 
2212 	/* Due to a race condition, it's possible that mac80211 asks
2213 	 * us to stop a hw_scan when it's already stopped.  This can
2214 	 * happen, for instance, if we stopped the scan ourselves,
2215 	 * called ieee80211_scan_completed() and the userspace called
2216 	 * cancel scan scan before ieee80211_scan_work() could run.
2217 	 * To handle that, simply return if the scan is not running.
2218 	*/
2219 	if (mvm->scan_status & IWL_MVM_SCAN_REGULAR)
2220 		iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_REGULAR, true);
2221 
2222 	mutex_unlock(&mvm->mutex);
2223 }
2224 
2225 static void
2226 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2227 				  struct ieee80211_sta *sta, u16 tids,
2228 				  int num_frames,
2229 				  enum ieee80211_frame_release_type reason,
2230 				  bool more_data)
2231 {
2232 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2233 
2234 	/* Called when we need to transmit (a) frame(s) from mac80211 */
2235 
2236 	iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2237 					  tids, more_data, false);
2238 }
2239 
2240 static void
2241 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2242 				    struct ieee80211_sta *sta, u16 tids,
2243 				    int num_frames,
2244 				    enum ieee80211_frame_release_type reason,
2245 				    bool more_data)
2246 {
2247 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2248 
2249 	/* Called when we need to transmit (a) frame(s) from agg queue */
2250 
2251 	iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2252 					  tids, more_data, true);
2253 }
2254 
2255 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2256 				   struct ieee80211_vif *vif,
2257 				   enum sta_notify_cmd cmd,
2258 				   struct ieee80211_sta *sta)
2259 {
2260 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2261 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2262 	unsigned long txqs = 0, tids = 0;
2263 	int tid;
2264 
2265 	spin_lock_bh(&mvmsta->lock);
2266 	for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2267 		struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2268 
2269 		if (tid_data->state != IWL_AGG_ON &&
2270 		    tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2271 			continue;
2272 
2273 		__set_bit(tid_data->txq_id, &txqs);
2274 
2275 		if (iwl_mvm_tid_queued(tid_data) == 0)
2276 			continue;
2277 
2278 		__set_bit(tid, &tids);
2279 	}
2280 
2281 	switch (cmd) {
2282 	case STA_NOTIFY_SLEEP:
2283 		if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2284 			ieee80211_sta_block_awake(hw, sta, true);
2285 
2286 		for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2287 			ieee80211_sta_set_buffered(sta, tid, true);
2288 
2289 		if (txqs)
2290 			iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2291 		/*
2292 		 * The fw updates the STA to be asleep. Tx packets on the Tx
2293 		 * queues to this station will not be transmitted. The fw will
2294 		 * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2295 		 */
2296 		break;
2297 	case STA_NOTIFY_AWAKE:
2298 		if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2299 			break;
2300 
2301 		if (txqs)
2302 			iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2303 		iwl_mvm_sta_modify_ps_wake(mvm, sta);
2304 		break;
2305 	default:
2306 		break;
2307 	}
2308 	spin_unlock_bh(&mvmsta->lock);
2309 }
2310 
2311 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2312 				       struct ieee80211_vif *vif,
2313 				       struct ieee80211_sta *sta)
2314 {
2315 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2316 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2317 
2318 	/*
2319 	 * This is called before mac80211 does RCU synchronisation,
2320 	 * so here we already invalidate our internal RCU-protected
2321 	 * station pointer. The rest of the code will thus no longer
2322 	 * be able to find the station this way, and we don't rely
2323 	 * on further RCU synchronisation after the sta_state()
2324 	 * callback deleted the station.
2325 	 */
2326 	mutex_lock(&mvm->mutex);
2327 	if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2328 		rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2329 				   ERR_PTR(-ENOENT));
2330 
2331 	mutex_unlock(&mvm->mutex);
2332 }
2333 
2334 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2335 				const u8 *bssid)
2336 {
2337 	if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2338 		return;
2339 
2340 	if (vif->p2p && !iwl_mvm_is_p2p_standalone_uapsd_supported(mvm)) {
2341 		vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2342 		return;
2343 	}
2344 
2345 	if (iwlwifi_mod_params.uapsd_disable) {
2346 		vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2347 		return;
2348 	}
2349 
2350 	vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2351 }
2352 
2353 static void
2354 iwl_mvm_tdls_check_trigger(struct iwl_mvm *mvm,
2355 			   struct ieee80211_vif *vif, u8 *peer_addr,
2356 			   enum nl80211_tdls_operation action)
2357 {
2358 	struct iwl_fw_dbg_trigger_tlv *trig;
2359 	struct iwl_fw_dbg_trigger_tdls *tdls_trig;
2360 
2361 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_TDLS))
2362 		return;
2363 
2364 	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_TDLS);
2365 	tdls_trig = (void *)trig->data;
2366 	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
2367 		return;
2368 
2369 	if (!(tdls_trig->action_bitmap & BIT(action)))
2370 		return;
2371 
2372 	if (tdls_trig->peer_mode &&
2373 	    memcmp(tdls_trig->peer, peer_addr, ETH_ALEN) != 0)
2374 		return;
2375 
2376 	iwl_mvm_fw_dbg_collect_trig(mvm, trig,
2377 				    "TDLS event occurred, peer %pM, action %d",
2378 				    peer_addr, action);
2379 }
2380 
2381 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2382 				 struct ieee80211_vif *vif,
2383 				 struct ieee80211_sta *sta,
2384 				 enum ieee80211_sta_state old_state,
2385 				 enum ieee80211_sta_state new_state)
2386 {
2387 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2388 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2389 	int ret;
2390 
2391 	IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2392 			   sta->addr, old_state, new_state);
2393 
2394 	/* this would be a mac80211 bug ... but don't crash */
2395 	if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2396 		return -EINVAL;
2397 
2398 	/* if a STA is being removed, reuse its ID */
2399 	flush_work(&mvm->sta_drained_wk);
2400 
2401 	mutex_lock(&mvm->mutex);
2402 	if (old_state == IEEE80211_STA_NOTEXIST &&
2403 	    new_state == IEEE80211_STA_NONE) {
2404 		/*
2405 		 * Firmware bug - it'll crash if the beacon interval is less
2406 		 * than 16. We can't avoid connecting at all, so refuse the
2407 		 * station state change, this will cause mac80211 to abandon
2408 		 * attempts to connect to this AP, and eventually wpa_s will
2409 		 * blacklist the AP...
2410 		 */
2411 		if (vif->type == NL80211_IFTYPE_STATION &&
2412 		    vif->bss_conf.beacon_int < 16) {
2413 			IWL_ERR(mvm,
2414 				"AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2415 				sta->addr, vif->bss_conf.beacon_int);
2416 			ret = -EINVAL;
2417 			goto out_unlock;
2418 		}
2419 
2420 		if (sta->tdls &&
2421 		    (vif->p2p ||
2422 		     iwl_mvm_tdls_sta_count(mvm, NULL) ==
2423 						IWL_MVM_TDLS_STA_COUNT ||
2424 		     iwl_mvm_phy_ctx_count(mvm) > 1)) {
2425 			IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2426 			ret = -EBUSY;
2427 			goto out_unlock;
2428 		}
2429 
2430 		ret = iwl_mvm_add_sta(mvm, vif, sta);
2431 		if (sta->tdls && ret == 0) {
2432 			iwl_mvm_recalc_tdls_state(mvm, vif, true);
2433 			iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2434 						   NL80211_TDLS_SETUP);
2435 		}
2436 	} else if (old_state == IEEE80211_STA_NONE &&
2437 		   new_state == IEEE80211_STA_AUTH) {
2438 		/*
2439 		 * EBS may be disabled due to previous failures reported by FW.
2440 		 * Reset EBS status here assuming environment has been changed.
2441 		 */
2442 		mvm->last_ebs_successful = true;
2443 		iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2444 		ret = 0;
2445 	} else if (old_state == IEEE80211_STA_AUTH &&
2446 		   new_state == IEEE80211_STA_ASSOC) {
2447 		if (vif->type == NL80211_IFTYPE_AP) {
2448 			mvmvif->ap_assoc_sta_count++;
2449 			iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2450 		}
2451 		ret = iwl_mvm_update_sta(mvm, vif, sta);
2452 		if (ret == 0)
2453 			iwl_mvm_rs_rate_init(mvm, sta,
2454 					     mvmvif->phy_ctxt->channel->band,
2455 					     true);
2456 	} else if (old_state == IEEE80211_STA_ASSOC &&
2457 		   new_state == IEEE80211_STA_AUTHORIZED) {
2458 
2459 		/* we don't support TDLS during DCM */
2460 		if (iwl_mvm_phy_ctx_count(mvm) > 1)
2461 			iwl_mvm_teardown_tdls_peers(mvm);
2462 
2463 		if (sta->tdls)
2464 			iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2465 						   NL80211_TDLS_ENABLE_LINK);
2466 
2467 		/* enable beacon filtering */
2468 		WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2469 		ret = 0;
2470 	} else if (old_state == IEEE80211_STA_AUTHORIZED &&
2471 		   new_state == IEEE80211_STA_ASSOC) {
2472 		/* disable beacon filtering */
2473 		WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2474 		ret = 0;
2475 	} else if (old_state == IEEE80211_STA_ASSOC &&
2476 		   new_state == IEEE80211_STA_AUTH) {
2477 		if (vif->type == NL80211_IFTYPE_AP) {
2478 			mvmvif->ap_assoc_sta_count--;
2479 			iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2480 		}
2481 		ret = 0;
2482 	} else if (old_state == IEEE80211_STA_AUTH &&
2483 		   new_state == IEEE80211_STA_NONE) {
2484 		ret = 0;
2485 	} else if (old_state == IEEE80211_STA_NONE &&
2486 		   new_state == IEEE80211_STA_NOTEXIST) {
2487 		ret = iwl_mvm_rm_sta(mvm, vif, sta);
2488 		if (sta->tdls) {
2489 			iwl_mvm_recalc_tdls_state(mvm, vif, false);
2490 			iwl_mvm_tdls_check_trigger(mvm, vif, sta->addr,
2491 						   NL80211_TDLS_DISABLE_LINK);
2492 		}
2493 	} else {
2494 		ret = -EIO;
2495 	}
2496  out_unlock:
2497 	mutex_unlock(&mvm->mutex);
2498 
2499 	if (sta->tdls && ret == 0) {
2500 		if (old_state == IEEE80211_STA_NOTEXIST &&
2501 		    new_state == IEEE80211_STA_NONE)
2502 			ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2503 		else if (old_state == IEEE80211_STA_NONE &&
2504 			 new_state == IEEE80211_STA_NOTEXIST)
2505 			ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2506 	}
2507 
2508 	return ret;
2509 }
2510 
2511 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2512 {
2513 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2514 
2515 	mvm->rts_threshold = value;
2516 
2517 	return 0;
2518 }
2519 
2520 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2521 				  struct ieee80211_vif *vif,
2522 				  struct ieee80211_sta *sta, u32 changed)
2523 {
2524 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2525 
2526 	if (vif->type == NL80211_IFTYPE_STATION &&
2527 	    changed & IEEE80211_RC_NSS_CHANGED)
2528 		iwl_mvm_sf_update(mvm, vif, false);
2529 }
2530 
2531 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2532 			       struct ieee80211_vif *vif, u16 ac,
2533 			       const struct ieee80211_tx_queue_params *params)
2534 {
2535 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2536 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2537 
2538 	mvmvif->queue_params[ac] = *params;
2539 
2540 	/*
2541 	 * No need to update right away, we'll get BSS_CHANGED_QOS
2542 	 * The exception is P2P_DEVICE interface which needs immediate update.
2543 	 */
2544 	if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2545 		int ret;
2546 
2547 		mutex_lock(&mvm->mutex);
2548 		ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2549 		mutex_unlock(&mvm->mutex);
2550 		return ret;
2551 	}
2552 	return 0;
2553 }
2554 
2555 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2556 				      struct ieee80211_vif *vif)
2557 {
2558 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2559 	u32 duration = IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS;
2560 	u32 min_duration = IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS;
2561 
2562 	if (WARN_ON_ONCE(vif->bss_conf.assoc))
2563 		return;
2564 
2565 	/*
2566 	 * iwl_mvm_protect_session() reads directly from the device
2567 	 * (the system time), so make sure it is available.
2568 	 */
2569 	if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2570 		return;
2571 
2572 	mutex_lock(&mvm->mutex);
2573 	/* Try really hard to protect the session and hear a beacon */
2574 	iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2575 	mutex_unlock(&mvm->mutex);
2576 
2577 	iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2578 }
2579 
2580 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2581 					struct ieee80211_vif *vif,
2582 					struct cfg80211_sched_scan_request *req,
2583 					struct ieee80211_scan_ies *ies)
2584 {
2585 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2586 
2587 	int ret;
2588 
2589 	mutex_lock(&mvm->mutex);
2590 
2591 	if (!vif->bss_conf.idle) {
2592 		ret = -EBUSY;
2593 		goto out;
2594 	}
2595 
2596 	ret = iwl_mvm_sched_scan_start(mvm, vif, req, ies, IWL_MVM_SCAN_SCHED);
2597 
2598 out:
2599 	mutex_unlock(&mvm->mutex);
2600 	return ret;
2601 }
2602 
2603 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2604 				       struct ieee80211_vif *vif)
2605 {
2606 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2607 	int ret;
2608 
2609 	mutex_lock(&mvm->mutex);
2610 
2611 	/* Due to a race condition, it's possible that mac80211 asks
2612 	 * us to stop a sched_scan when it's already stopped.  This
2613 	 * can happen, for instance, if we stopped the scan ourselves,
2614 	 * called ieee80211_sched_scan_stopped() and the userspace called
2615 	 * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2616 	 * could run.  To handle this, simply return if the scan is
2617 	 * not running.
2618 	*/
2619 	if (!(mvm->scan_status & IWL_MVM_SCAN_SCHED)) {
2620 		mutex_unlock(&mvm->mutex);
2621 		return 0;
2622 	}
2623 
2624 	ret = iwl_mvm_scan_stop(mvm, IWL_MVM_SCAN_SCHED, false);
2625 	mutex_unlock(&mvm->mutex);
2626 	iwl_mvm_wait_for_async_handlers(mvm);
2627 
2628 	return ret;
2629 }
2630 
2631 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2632 			       enum set_key_cmd cmd,
2633 			       struct ieee80211_vif *vif,
2634 			       struct ieee80211_sta *sta,
2635 			       struct ieee80211_key_conf *key)
2636 {
2637 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2638 	struct iwl_mvm_sta *mvmsta;
2639 	struct iwl_mvm_key_pn *ptk_pn;
2640 	int keyidx = key->keyidx;
2641 	int ret;
2642 	u8 key_offset;
2643 
2644 	if (iwlwifi_mod_params.sw_crypto) {
2645 		IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2646 		return -EOPNOTSUPP;
2647 	}
2648 
2649 	switch (key->cipher) {
2650 	case WLAN_CIPHER_SUITE_TKIP:
2651 		key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2652 		key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2653 		break;
2654 	case WLAN_CIPHER_SUITE_CCMP:
2655 		key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2656 		break;
2657 	case WLAN_CIPHER_SUITE_AES_CMAC:
2658 		WARN_ON_ONCE(!ieee80211_hw_check(hw, MFP_CAPABLE));
2659 		break;
2660 	case WLAN_CIPHER_SUITE_WEP40:
2661 	case WLAN_CIPHER_SUITE_WEP104:
2662 		/* For non-client mode, only use WEP keys for TX as we probably
2663 		 * don't have a station yet anyway and would then have to keep
2664 		 * track of the keys, linking them to each of the clients/peers
2665 		 * as they appear. For now, don't do that, for performance WEP
2666 		 * offload doesn't really matter much, but we need it for some
2667 		 * other offload features in client mode.
2668 		 */
2669 		if (vif->type != NL80211_IFTYPE_STATION)
2670 			return 0;
2671 		break;
2672 	default:
2673 		/* currently FW supports only one optional cipher scheme */
2674 		if (hw->n_cipher_schemes &&
2675 		    hw->cipher_schemes->cipher == key->cipher)
2676 			key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2677 		else
2678 			return -EOPNOTSUPP;
2679 	}
2680 
2681 	mutex_lock(&mvm->mutex);
2682 
2683 	switch (cmd) {
2684 	case SET_KEY:
2685 		if ((vif->type == NL80211_IFTYPE_ADHOC ||
2686 		     vif->type == NL80211_IFTYPE_AP) && !sta) {
2687 			/*
2688 			 * GTK on AP interface is a TX-only key, return 0;
2689 			 * on IBSS they're per-station and because we're lazy
2690 			 * we don't support them for RX, so do the same.
2691 			 * CMAC in AP/IBSS modes must be done in software.
2692 			 */
2693 			if (key->cipher == WLAN_CIPHER_SUITE_AES_CMAC)
2694 				ret = -EOPNOTSUPP;
2695 			else
2696 				ret = 0;
2697 			key->hw_key_idx = STA_KEY_IDX_INVALID;
2698 			break;
2699 		}
2700 
2701 		/* During FW restart, in order to restore the state as it was,
2702 		 * don't try to reprogram keys we previously failed for.
2703 		 */
2704 		if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2705 		    key->hw_key_idx == STA_KEY_IDX_INVALID) {
2706 			IWL_DEBUG_MAC80211(mvm,
2707 					   "skip invalid idx key programming during restart\n");
2708 			ret = 0;
2709 			break;
2710 		}
2711 
2712 		if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status) &&
2713 		    sta && iwl_mvm_has_new_rx_api(mvm) &&
2714 		    key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2715 		    (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2716 		     key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2717 			struct ieee80211_key_seq seq;
2718 			int tid, q;
2719 
2720 			mvmsta = iwl_mvm_sta_from_mac80211(sta);
2721 			WARN_ON(rcu_access_pointer(mvmsta->ptk_pn[keyidx]));
2722 			ptk_pn = kzalloc(sizeof(*ptk_pn) +
2723 					 mvm->trans->num_rx_queues *
2724 						sizeof(ptk_pn->q[0]),
2725 					 GFP_KERNEL);
2726 			if (!ptk_pn) {
2727 				ret = -ENOMEM;
2728 				break;
2729 			}
2730 
2731 			for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2732 				ieee80211_get_key_rx_seq(key, tid, &seq);
2733 				for (q = 0; q < mvm->trans->num_rx_queues; q++)
2734 					memcpy(ptk_pn->q[q].pn[tid],
2735 					       seq.ccmp.pn,
2736 					       IEEE80211_CCMP_PN_LEN);
2737 			}
2738 
2739 			rcu_assign_pointer(mvmsta->ptk_pn[keyidx], ptk_pn);
2740 		}
2741 
2742 		/* in HW restart reuse the index, otherwise request a new one */
2743 		if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
2744 			key_offset = key->hw_key_idx;
2745 		else
2746 			key_offset = STA_KEY_IDX_INVALID;
2747 
2748 		IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2749 		ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, key_offset);
2750 		if (ret) {
2751 			IWL_WARN(mvm, "set key failed\n");
2752 			/*
2753 			 * can't add key for RX, but we don't need it
2754 			 * in the device for TX so still return 0
2755 			 */
2756 			key->hw_key_idx = STA_KEY_IDX_INVALID;
2757 			ret = 0;
2758 		}
2759 
2760 		break;
2761 	case DISABLE_KEY:
2762 		if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2763 			ret = 0;
2764 			break;
2765 		}
2766 
2767 		if (sta && iwl_mvm_has_new_rx_api(mvm) &&
2768 		    key->flags & IEEE80211_KEY_FLAG_PAIRWISE &&
2769 		    (key->cipher == WLAN_CIPHER_SUITE_CCMP ||
2770 		     key->cipher == WLAN_CIPHER_SUITE_GCMP)) {
2771 			mvmsta = iwl_mvm_sta_from_mac80211(sta);
2772 			ptk_pn = rcu_dereference_protected(
2773 						mvmsta->ptk_pn[keyidx],
2774 						lockdep_is_held(&mvm->mutex));
2775 			RCU_INIT_POINTER(mvmsta->ptk_pn[keyidx], NULL);
2776 			if (ptk_pn)
2777 				kfree_rcu(ptk_pn, rcu_head);
2778 		}
2779 
2780 		IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2781 		ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2782 		break;
2783 	default:
2784 		ret = -EINVAL;
2785 	}
2786 
2787 	mutex_unlock(&mvm->mutex);
2788 	return ret;
2789 }
2790 
2791 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2792 					struct ieee80211_vif *vif,
2793 					struct ieee80211_key_conf *keyconf,
2794 					struct ieee80211_sta *sta,
2795 					u32 iv32, u16 *phase1key)
2796 {
2797 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2798 
2799 	if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2800 		return;
2801 
2802 	iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2803 }
2804 
2805 
2806 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2807 			       struct iwl_rx_packet *pkt, void *data)
2808 {
2809 	struct iwl_mvm *mvm =
2810 		container_of(notif_wait, struct iwl_mvm, notif_wait);
2811 	struct iwl_hs20_roc_res *resp;
2812 	int resp_len = iwl_rx_packet_payload_len(pkt);
2813 	struct iwl_mvm_time_event_data *te_data = data;
2814 
2815 	if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2816 		return true;
2817 
2818 	if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2819 		IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2820 		return true;
2821 	}
2822 
2823 	resp = (void *)pkt->data;
2824 
2825 	IWL_DEBUG_TE(mvm,
2826 		     "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2827 		     resp->status, resp->event_unique_id);
2828 
2829 	te_data->uid = le32_to_cpu(resp->event_unique_id);
2830 	IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2831 		     te_data->uid);
2832 
2833 	spin_lock_bh(&mvm->time_event_lock);
2834 	list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2835 	spin_unlock_bh(&mvm->time_event_lock);
2836 
2837 	return true;
2838 }
2839 
2840 #define AUX_ROC_MIN_DURATION MSEC_TO_TU(100)
2841 #define AUX_ROC_MIN_DELAY MSEC_TO_TU(200)
2842 #define AUX_ROC_MAX_DELAY MSEC_TO_TU(600)
2843 #define AUX_ROC_SAFETY_BUFFER MSEC_TO_TU(20)
2844 #define AUX_ROC_MIN_SAFETY_BUFFER MSEC_TO_TU(10)
2845 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2846 				    struct ieee80211_channel *channel,
2847 				    struct ieee80211_vif *vif,
2848 				    int duration)
2849 {
2850 	int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2851 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2852 	struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2853 	static const u16 time_event_response[] = { HOT_SPOT_CMD };
2854 	struct iwl_notification_wait wait_time_event;
2855 	u32 dtim_interval = vif->bss_conf.dtim_period *
2856 		vif->bss_conf.beacon_int;
2857 	u32 req_dur, delay;
2858 	struct iwl_hs20_roc_req aux_roc_req = {
2859 		.action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2860 		.id_and_color =
2861 			cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2862 		.sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2863 		/* Set the channel info data */
2864 		.channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2865 			PHY_BAND_24 : PHY_BAND_5,
2866 		.channel_info.channel = channel->hw_value,
2867 		.channel_info.width = PHY_VHT_CHANNEL_MODE20,
2868 		/* Set the time and duration */
2869 		.apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2870 	 };
2871 
2872 	delay = AUX_ROC_MIN_DELAY;
2873 	req_dur = MSEC_TO_TU(duration);
2874 
2875 	/*
2876 	 * If we are associated we want the delay time to be at least one
2877 	 * dtim interval so that the FW can wait until after the DTIM and
2878 	 * then start the time event, this will potentially allow us to
2879 	 * remain off-channel for the max duration.
2880 	 * Since we want to use almost a whole dtim interval we would also
2881 	 * like the delay to be for 2-3 dtim intervals, in case there are
2882 	 * other time events with higher priority.
2883 	 */
2884 	if (vif->bss_conf.assoc) {
2885 		delay = min_t(u32, dtim_interval * 3, AUX_ROC_MAX_DELAY);
2886 		/* We cannot remain off-channel longer than the DTIM interval */
2887 		if (dtim_interval <= req_dur) {
2888 			req_dur = dtim_interval - AUX_ROC_SAFETY_BUFFER;
2889 			if (req_dur <= AUX_ROC_MIN_DURATION)
2890 				req_dur = dtim_interval -
2891 					AUX_ROC_MIN_SAFETY_BUFFER;
2892 		}
2893 	}
2894 
2895 	aux_roc_req.duration = cpu_to_le32(req_dur);
2896 	aux_roc_req.apply_time_max_delay = cpu_to_le32(delay);
2897 
2898 	IWL_DEBUG_TE(mvm,
2899 		     "ROC: Requesting to remain on channel %u for %ums (requested = %ums, max_delay = %ums, dtim_interval = %ums)\n",
2900 		     channel->hw_value, req_dur, duration, delay,
2901 		     dtim_interval);
2902 	/* Set the node address */
2903 	memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2904 
2905 	lockdep_assert_held(&mvm->mutex);
2906 
2907 	spin_lock_bh(&mvm->time_event_lock);
2908 
2909 	if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2910 		spin_unlock_bh(&mvm->time_event_lock);
2911 		return -EIO;
2912 	}
2913 
2914 	te_data->vif = vif;
2915 	te_data->duration = duration;
2916 	te_data->id = HOT_SPOT_CMD;
2917 
2918 	spin_unlock_bh(&mvm->time_event_lock);
2919 
2920 	/*
2921 	 * Use a notification wait, which really just processes the
2922 	 * command response and doesn't wait for anything, in order
2923 	 * to be able to process the response and get the UID inside
2924 	 * the RX path. Using CMD_WANT_SKB doesn't work because it
2925 	 * stores the buffer and then wakes up this thread, by which
2926 	 * time another notification (that the time event started)
2927 	 * might already be processed unsuccessfully.
2928 	 */
2929 	iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2930 				   time_event_response,
2931 				   ARRAY_SIZE(time_event_response),
2932 				   iwl_mvm_rx_aux_roc, te_data);
2933 
2934 	res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2935 				   &aux_roc_req);
2936 
2937 	if (res) {
2938 		IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2939 		iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2940 		goto out_clear_te;
2941 	}
2942 
2943 	/* No need to wait for anything, so just pass 1 (0 isn't valid) */
2944 	res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2945 	/* should never fail */
2946 	WARN_ON_ONCE(res);
2947 
2948 	if (res) {
2949  out_clear_te:
2950 		spin_lock_bh(&mvm->time_event_lock);
2951 		iwl_mvm_te_clear_data(mvm, te_data);
2952 		spin_unlock_bh(&mvm->time_event_lock);
2953 	}
2954 
2955 	return res;
2956 }
2957 
2958 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2959 		       struct ieee80211_vif *vif,
2960 		       struct ieee80211_channel *channel,
2961 		       int duration,
2962 		       enum ieee80211_roc_type type)
2963 {
2964 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2965 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2966 	struct cfg80211_chan_def chandef;
2967 	struct iwl_mvm_phy_ctxt *phy_ctxt;
2968 	int ret, i;
2969 
2970 	IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2971 			   duration, type);
2972 
2973 	flush_work(&mvm->roc_done_wk);
2974 
2975 	mutex_lock(&mvm->mutex);
2976 
2977 	switch (vif->type) {
2978 	case NL80211_IFTYPE_STATION:
2979 		if (fw_has_capa(&mvm->fw->ucode_capa,
2980 				IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT)) {
2981 			/* Use aux roc framework (HS20) */
2982 			ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2983 						       vif, duration);
2984 			goto out_unlock;
2985 		}
2986 		IWL_ERR(mvm, "hotspot not supported\n");
2987 		ret = -EINVAL;
2988 		goto out_unlock;
2989 	case NL80211_IFTYPE_P2P_DEVICE:
2990 		/* handle below */
2991 		break;
2992 	default:
2993 		IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2994 		ret = -EINVAL;
2995 		goto out_unlock;
2996 	}
2997 
2998 	for (i = 0; i < NUM_PHY_CTX; i++) {
2999 		phy_ctxt = &mvm->phy_ctxts[i];
3000 		if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
3001 			continue;
3002 
3003 		if (phy_ctxt->ref && channel == phy_ctxt->channel) {
3004 			/*
3005 			 * Unbind the P2P_DEVICE from the current PHY context,
3006 			 * and if the PHY context is not used remove it.
3007 			 */
3008 			ret = iwl_mvm_binding_remove_vif(mvm, vif);
3009 			if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3010 				goto out_unlock;
3011 
3012 			iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3013 
3014 			/* Bind the P2P_DEVICE to the current PHY Context */
3015 			mvmvif->phy_ctxt = phy_ctxt;
3016 
3017 			ret = iwl_mvm_binding_add_vif(mvm, vif);
3018 			if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3019 				goto out_unlock;
3020 
3021 			iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3022 			goto schedule_time_event;
3023 		}
3024 	}
3025 
3026 	/* Need to update the PHY context only if the ROC channel changed */
3027 	if (channel == mvmvif->phy_ctxt->channel)
3028 		goto schedule_time_event;
3029 
3030 	cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
3031 
3032 	/*
3033 	 * Change the PHY context configuration as it is currently referenced
3034 	 * only by the P2P Device MAC
3035 	 */
3036 	if (mvmvif->phy_ctxt->ref == 1) {
3037 		ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
3038 					       &chandef, 1, 1);
3039 		if (ret)
3040 			goto out_unlock;
3041 	} else {
3042 		/*
3043 		 * The PHY context is shared with other MACs. Need to remove the
3044 		 * P2P Device from the binding, allocate an new PHY context and
3045 		 * create a new binding
3046 		 */
3047 		phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3048 		if (!phy_ctxt) {
3049 			ret = -ENOSPC;
3050 			goto out_unlock;
3051 		}
3052 
3053 		ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
3054 					       1, 1);
3055 		if (ret) {
3056 			IWL_ERR(mvm, "Failed to change PHY context\n");
3057 			goto out_unlock;
3058 		}
3059 
3060 		/* Unbind the P2P_DEVICE from the current PHY context */
3061 		ret = iwl_mvm_binding_remove_vif(mvm, vif);
3062 		if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
3063 			goto out_unlock;
3064 
3065 		iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
3066 
3067 		/* Bind the P2P_DEVICE to the new allocated PHY context */
3068 		mvmvif->phy_ctxt = phy_ctxt;
3069 
3070 		ret = iwl_mvm_binding_add_vif(mvm, vif);
3071 		if (WARN(ret, "Failed binding P2P_DEVICE\n"))
3072 			goto out_unlock;
3073 
3074 		iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
3075 	}
3076 
3077 schedule_time_event:
3078 	/* Schedule the time events */
3079 	ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
3080 
3081 out_unlock:
3082 	mutex_unlock(&mvm->mutex);
3083 	IWL_DEBUG_MAC80211(mvm, "leave\n");
3084 	return ret;
3085 }
3086 
3087 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3088 {
3089 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3090 
3091 	IWL_DEBUG_MAC80211(mvm, "enter\n");
3092 
3093 	mutex_lock(&mvm->mutex);
3094 	iwl_mvm_stop_roc(mvm);
3095 	mutex_unlock(&mvm->mutex);
3096 
3097 	IWL_DEBUG_MAC80211(mvm, "leave\n");
3098 	return 0;
3099 }
3100 
3101 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3102 				 struct ieee80211_chanctx_conf *ctx)
3103 {
3104 	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3105 	struct iwl_mvm_phy_ctxt *phy_ctxt;
3106 	int ret;
3107 
3108 	lockdep_assert_held(&mvm->mutex);
3109 
3110 	IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3111 
3112 	phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3113 	if (!phy_ctxt) {
3114 		ret = -ENOSPC;
3115 		goto out;
3116 	}
3117 
3118 	ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3119 				       ctx->rx_chains_static,
3120 				       ctx->rx_chains_dynamic);
3121 	if (ret) {
3122 		IWL_ERR(mvm, "Failed to add PHY context\n");
3123 		goto out;
3124 	}
3125 
3126 	iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3127 	*phy_ctxt_id = phy_ctxt->id;
3128 out:
3129 	return ret;
3130 }
3131 
3132 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3133 			       struct ieee80211_chanctx_conf *ctx)
3134 {
3135 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3136 	int ret;
3137 
3138 	mutex_lock(&mvm->mutex);
3139 	ret = __iwl_mvm_add_chanctx(mvm, ctx);
3140 	mutex_unlock(&mvm->mutex);
3141 
3142 	return ret;
3143 }
3144 
3145 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3146 				     struct ieee80211_chanctx_conf *ctx)
3147 {
3148 	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3149 	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3150 
3151 	lockdep_assert_held(&mvm->mutex);
3152 
3153 	iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3154 }
3155 
3156 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3157 				   struct ieee80211_chanctx_conf *ctx)
3158 {
3159 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3160 
3161 	mutex_lock(&mvm->mutex);
3162 	__iwl_mvm_remove_chanctx(mvm, ctx);
3163 	mutex_unlock(&mvm->mutex);
3164 }
3165 
3166 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3167 				   struct ieee80211_chanctx_conf *ctx,
3168 				   u32 changed)
3169 {
3170 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3171 	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3172 	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3173 
3174 	if (WARN_ONCE((phy_ctxt->ref > 1) &&
3175 		      (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3176 				   IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3177 				   IEEE80211_CHANCTX_CHANGE_RADAR |
3178 				   IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3179 		      "Cannot change PHY. Ref=%d, changed=0x%X\n",
3180 		      phy_ctxt->ref, changed))
3181 		return;
3182 
3183 	mutex_lock(&mvm->mutex);
3184 	iwl_mvm_bt_coex_vif_change(mvm);
3185 	iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3186 				 ctx->rx_chains_static,
3187 				 ctx->rx_chains_dynamic);
3188 	mutex_unlock(&mvm->mutex);
3189 }
3190 
3191 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3192 					struct ieee80211_vif *vif,
3193 					struct ieee80211_chanctx_conf *ctx,
3194 					bool switching_chanctx)
3195 {
3196 	u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3197 	struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3198 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3199 	int ret;
3200 
3201 	lockdep_assert_held(&mvm->mutex);
3202 
3203 	mvmvif->phy_ctxt = phy_ctxt;
3204 
3205 	switch (vif->type) {
3206 	case NL80211_IFTYPE_AP:
3207 		/* only needed if we're switching chanctx (i.e. during CSA) */
3208 		if (switching_chanctx) {
3209 			mvmvif->ap_ibss_active = true;
3210 			break;
3211 		}
3212 	case NL80211_IFTYPE_ADHOC:
3213 		/*
3214 		 * The AP binding flow is handled as part of the start_ap flow
3215 		 * (in bss_info_changed), similarly for IBSS.
3216 		 */
3217 		ret = 0;
3218 		goto out;
3219 	case NL80211_IFTYPE_STATION:
3220 		break;
3221 	case NL80211_IFTYPE_MONITOR:
3222 		/* always disable PS when a monitor interface is active */
3223 		mvmvif->ps_disabled = true;
3224 		break;
3225 	default:
3226 		ret = -EINVAL;
3227 		goto out;
3228 	}
3229 
3230 	ret = iwl_mvm_binding_add_vif(mvm, vif);
3231 	if (ret)
3232 		goto out;
3233 
3234 	/*
3235 	 * Power state must be updated before quotas,
3236 	 * otherwise fw will complain.
3237 	 */
3238 	iwl_mvm_power_update_mac(mvm);
3239 
3240 	/* Setting the quota at this stage is only required for monitor
3241 	 * interfaces. For the other types, the bss_info changed flow
3242 	 * will handle quota settings.
3243 	 */
3244 	if (vif->type == NL80211_IFTYPE_MONITOR) {
3245 		mvmvif->monitor_active = true;
3246 		ret = iwl_mvm_update_quotas(mvm, false, NULL);
3247 		if (ret)
3248 			goto out_remove_binding;
3249 
3250 		ret = iwl_mvm_add_snif_sta(mvm, vif);
3251 		if (ret)
3252 			goto out_remove_binding;
3253 
3254 	}
3255 
3256 	/* Handle binding during CSA */
3257 	if (vif->type == NL80211_IFTYPE_AP) {
3258 		iwl_mvm_update_quotas(mvm, false, NULL);
3259 		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3260 	}
3261 
3262 	if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3263 		u32 duration = 2 * vif->bss_conf.beacon_int;
3264 
3265 		/* iwl_mvm_protect_session() reads directly from the
3266 		 * device (the system time), so make sure it is
3267 		 * available.
3268 		 */
3269 		ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3270 		if (ret)
3271 			goto out_remove_binding;
3272 
3273 		/* Protect the session to make sure we hear the first
3274 		 * beacon on the new channel.
3275 		 */
3276 		iwl_mvm_protect_session(mvm, vif, duration, duration,
3277 					vif->bss_conf.beacon_int / 2,
3278 					true);
3279 
3280 		iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3281 
3282 		iwl_mvm_update_quotas(mvm, false, NULL);
3283 	}
3284 
3285 	goto out;
3286 
3287 out_remove_binding:
3288 	iwl_mvm_binding_remove_vif(mvm, vif);
3289 	iwl_mvm_power_update_mac(mvm);
3290 out:
3291 	if (ret)
3292 		mvmvif->phy_ctxt = NULL;
3293 	return ret;
3294 }
3295 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3296 				      struct ieee80211_vif *vif,
3297 				      struct ieee80211_chanctx_conf *ctx)
3298 {
3299 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3300 	int ret;
3301 
3302 	mutex_lock(&mvm->mutex);
3303 	ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3304 	mutex_unlock(&mvm->mutex);
3305 
3306 	return ret;
3307 }
3308 
3309 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3310 					   struct ieee80211_vif *vif,
3311 					   struct ieee80211_chanctx_conf *ctx,
3312 					   bool switching_chanctx)
3313 {
3314 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3315 	struct ieee80211_vif *disabled_vif = NULL;
3316 
3317 	lockdep_assert_held(&mvm->mutex);
3318 
3319 	iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3320 
3321 	switch (vif->type) {
3322 	case NL80211_IFTYPE_ADHOC:
3323 		goto out;
3324 	case NL80211_IFTYPE_MONITOR:
3325 		mvmvif->monitor_active = false;
3326 		mvmvif->ps_disabled = false;
3327 		iwl_mvm_rm_snif_sta(mvm, vif);
3328 		break;
3329 	case NL80211_IFTYPE_AP:
3330 		/* This part is triggered only during CSA */
3331 		if (!switching_chanctx || !mvmvif->ap_ibss_active)
3332 			goto out;
3333 
3334 		mvmvif->csa_countdown = false;
3335 
3336 		/* Set CS bit on all the stations */
3337 		iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3338 
3339 		/* Save blocked iface, the timeout is set on the next beacon */
3340 		rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3341 
3342 		mvmvif->ap_ibss_active = false;
3343 		break;
3344 	case NL80211_IFTYPE_STATION:
3345 		if (!switching_chanctx)
3346 			break;
3347 
3348 		disabled_vif = vif;
3349 
3350 		iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3351 		break;
3352 	default:
3353 		break;
3354 	}
3355 
3356 	iwl_mvm_update_quotas(mvm, false, disabled_vif);
3357 	iwl_mvm_binding_remove_vif(mvm, vif);
3358 
3359 out:
3360 	mvmvif->phy_ctxt = NULL;
3361 	iwl_mvm_power_update_mac(mvm);
3362 }
3363 
3364 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3365 					 struct ieee80211_vif *vif,
3366 					 struct ieee80211_chanctx_conf *ctx)
3367 {
3368 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3369 
3370 	mutex_lock(&mvm->mutex);
3371 	__iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3372 	mutex_unlock(&mvm->mutex);
3373 }
3374 
3375 static int
3376 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3377 				struct ieee80211_vif_chanctx_switch *vifs)
3378 {
3379 	int ret;
3380 
3381 	mutex_lock(&mvm->mutex);
3382 	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3383 	__iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3384 
3385 	ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3386 	if (ret) {
3387 		IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3388 		goto out_reassign;
3389 	}
3390 
3391 	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3392 					   true);
3393 	if (ret) {
3394 		IWL_ERR(mvm,
3395 			"failed to assign new_ctx during channel switch\n");
3396 		goto out_remove;
3397 	}
3398 
3399 	/* we don't support TDLS during DCM - can be caused by channel switch */
3400 	if (iwl_mvm_phy_ctx_count(mvm) > 1)
3401 		iwl_mvm_teardown_tdls_peers(mvm);
3402 
3403 	goto out;
3404 
3405 out_remove:
3406 	__iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3407 
3408 out_reassign:
3409 	if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3410 		IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3411 		goto out_restart;
3412 	}
3413 
3414 	if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3415 					 true)) {
3416 		IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3417 		goto out_restart;
3418 	}
3419 
3420 	goto out;
3421 
3422 out_restart:
3423 	/* things keep failing, better restart the hw */
3424 	iwl_mvm_nic_restart(mvm, false);
3425 
3426 out:
3427 	mutex_unlock(&mvm->mutex);
3428 
3429 	return ret;
3430 }
3431 
3432 static int
3433 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3434 				    struct ieee80211_vif_chanctx_switch *vifs)
3435 {
3436 	int ret;
3437 
3438 	mutex_lock(&mvm->mutex);
3439 	__iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3440 
3441 	ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3442 					   true);
3443 	if (ret) {
3444 		IWL_ERR(mvm,
3445 			"failed to assign new_ctx during channel switch\n");
3446 		goto out_reassign;
3447 	}
3448 
3449 	goto out;
3450 
3451 out_reassign:
3452 	if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3453 					 true)) {
3454 		IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3455 		goto out_restart;
3456 	}
3457 
3458 	goto out;
3459 
3460 out_restart:
3461 	/* things keep failing, better restart the hw */
3462 	iwl_mvm_nic_restart(mvm, false);
3463 
3464 out:
3465 	mutex_unlock(&mvm->mutex);
3466 
3467 	return ret;
3468 }
3469 
3470 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3471 				      struct ieee80211_vif_chanctx_switch *vifs,
3472 				      int n_vifs,
3473 				      enum ieee80211_chanctx_switch_mode mode)
3474 {
3475 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3476 	int ret;
3477 
3478 	/* we only support a single-vif right now */
3479 	if (n_vifs > 1)
3480 		return -EOPNOTSUPP;
3481 
3482 	switch (mode) {
3483 	case CHANCTX_SWMODE_SWAP_CONTEXTS:
3484 		ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3485 		break;
3486 	case CHANCTX_SWMODE_REASSIGN_VIF:
3487 		ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3488 		break;
3489 	default:
3490 		ret = -EOPNOTSUPP;
3491 		break;
3492 	}
3493 
3494 	return ret;
3495 }
3496 
3497 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3498 			   struct ieee80211_sta *sta,
3499 			   bool set)
3500 {
3501 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3502 	struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3503 
3504 	if (!mvm_sta || !mvm_sta->vif) {
3505 		IWL_ERR(mvm, "Station is not associated to a vif\n");
3506 		return -EINVAL;
3507 	}
3508 
3509 	return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3510 }
3511 
3512 #ifdef CONFIG_NL80211_TESTMODE
3513 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3514 	[IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3515 	[IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3516 	[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3517 };
3518 
3519 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3520 				      struct ieee80211_vif *vif,
3521 				      void *data, int len)
3522 {
3523 	struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3524 	int err;
3525 	u32 noa_duration;
3526 
3527 	err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3528 	if (err)
3529 		return err;
3530 
3531 	if (!tb[IWL_MVM_TM_ATTR_CMD])
3532 		return -EINVAL;
3533 
3534 	switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3535 	case IWL_MVM_TM_CMD_SET_NOA:
3536 		if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3537 		    !vif->bss_conf.enable_beacon ||
3538 		    !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3539 			return -EINVAL;
3540 
3541 		noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3542 		if (noa_duration >= vif->bss_conf.beacon_int)
3543 			return -EINVAL;
3544 
3545 		mvm->noa_duration = noa_duration;
3546 		mvm->noa_vif = vif;
3547 
3548 		return iwl_mvm_update_quotas(mvm, false, NULL);
3549 	case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3550 		/* must be associated client vif - ignore authorized */
3551 		if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3552 		    !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3553 		    !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3554 			return -EINVAL;
3555 
3556 		if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3557 			return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3558 		return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3559 	}
3560 
3561 	return -EOPNOTSUPP;
3562 }
3563 
3564 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3565 				    struct ieee80211_vif *vif,
3566 				    void *data, int len)
3567 {
3568 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3569 	int err;
3570 
3571 	mutex_lock(&mvm->mutex);
3572 	err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3573 	mutex_unlock(&mvm->mutex);
3574 
3575 	return err;
3576 }
3577 #endif
3578 
3579 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3580 				   struct ieee80211_vif *vif,
3581 				   struct ieee80211_channel_switch *chsw)
3582 {
3583 	/* By implementing this operation, we prevent mac80211 from
3584 	 * starting its own channel switch timer, so that we can call
3585 	 * ieee80211_chswitch_done() ourselves at the right time
3586 	 * (which is when the absence time event starts).
3587 	 */
3588 
3589 	IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3590 			   "dummy channel switch op\n");
3591 }
3592 
3593 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3594 				      struct ieee80211_vif *vif,
3595 				      struct ieee80211_channel_switch *chsw)
3596 {
3597 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3598 	struct ieee80211_vif *csa_vif;
3599 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3600 	u32 apply_time;
3601 	int ret;
3602 
3603 	mutex_lock(&mvm->mutex);
3604 
3605 	mvmvif->csa_failed = false;
3606 
3607 	IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3608 			   chsw->chandef.center_freq1);
3609 
3610 	iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH);
3611 
3612 	switch (vif->type) {
3613 	case NL80211_IFTYPE_AP:
3614 		csa_vif =
3615 			rcu_dereference_protected(mvm->csa_vif,
3616 						  lockdep_is_held(&mvm->mutex));
3617 		if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3618 			      "Another CSA is already in progress")) {
3619 			ret = -EBUSY;
3620 			goto out_unlock;
3621 		}
3622 
3623 		rcu_assign_pointer(mvm->csa_vif, vif);
3624 
3625 		if (WARN_ONCE(mvmvif->csa_countdown,
3626 			      "Previous CSA countdown didn't complete")) {
3627 			ret = -EBUSY;
3628 			goto out_unlock;
3629 		}
3630 
3631 		break;
3632 	case NL80211_IFTYPE_STATION:
3633 		/* Schedule the time event to a bit before beacon 1,
3634 		 * to make sure we're in the new channel when the
3635 		 * GO/AP arrives.
3636 		 */
3637 		apply_time = chsw->device_timestamp +
3638 			((vif->bss_conf.beacon_int * (chsw->count - 1) -
3639 			  IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3640 
3641 		if (chsw->block_tx)
3642 			iwl_mvm_csa_client_absent(mvm, vif);
3643 
3644 		iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3645 					    apply_time);
3646 		if (mvmvif->bf_data.bf_enabled) {
3647 			ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3648 			if (ret)
3649 				goto out_unlock;
3650 		}
3651 
3652 		break;
3653 	default:
3654 		break;
3655 	}
3656 
3657 	mvmvif->ps_disabled = true;
3658 
3659 	ret = iwl_mvm_power_update_ps(mvm);
3660 	if (ret)
3661 		goto out_unlock;
3662 
3663 	/* we won't be on this channel any longer */
3664 	iwl_mvm_teardown_tdls_peers(mvm);
3665 
3666 out_unlock:
3667 	mutex_unlock(&mvm->mutex);
3668 
3669 	return ret;
3670 }
3671 
3672 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3673 				       struct ieee80211_vif *vif)
3674 {
3675 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3676 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3677 	int ret;
3678 
3679 	mutex_lock(&mvm->mutex);
3680 
3681 	if (mvmvif->csa_failed) {
3682 		mvmvif->csa_failed = false;
3683 		ret = -EIO;
3684 		goto out_unlock;
3685 	}
3686 
3687 	if (vif->type == NL80211_IFTYPE_STATION) {
3688 		struct iwl_mvm_sta *mvmsta;
3689 
3690 		mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3691 							  mvmvif->ap_sta_id);
3692 
3693 		if (WARN_ON(!mvmsta)) {
3694 			ret = -EIO;
3695 			goto out_unlock;
3696 		}
3697 
3698 		iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3699 
3700 		iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3701 
3702 		ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3703 		if (ret)
3704 			goto out_unlock;
3705 
3706 		iwl_mvm_stop_session_protection(mvm, vif);
3707 	}
3708 
3709 	mvmvif->ps_disabled = false;
3710 
3711 	ret = iwl_mvm_power_update_ps(mvm);
3712 
3713 out_unlock:
3714 	mutex_unlock(&mvm->mutex);
3715 
3716 	return ret;
3717 }
3718 
3719 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3720 			      struct ieee80211_vif *vif, u32 queues, bool drop)
3721 {
3722 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3723 	struct iwl_mvm_vif *mvmvif;
3724 	struct iwl_mvm_sta *mvmsta;
3725 	struct ieee80211_sta *sta;
3726 	int i;
3727 	u32 msk = 0;
3728 
3729 	if (!vif || vif->type != NL80211_IFTYPE_STATION)
3730 		return;
3731 
3732 	mutex_lock(&mvm->mutex);
3733 	mvmvif = iwl_mvm_vif_from_mac80211(vif);
3734 
3735 	/* flush the AP-station and all TDLS peers */
3736 	for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3737 		sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3738 						lockdep_is_held(&mvm->mutex));
3739 		if (IS_ERR_OR_NULL(sta))
3740 			continue;
3741 
3742 		mvmsta = iwl_mvm_sta_from_mac80211(sta);
3743 		if (mvmsta->vif != vif)
3744 			continue;
3745 
3746 		/* make sure only TDLS peers or the AP are flushed */
3747 		WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3748 
3749 		msk |= mvmsta->tfd_queue_msk;
3750 	}
3751 
3752 	if (drop) {
3753 		if (iwl_mvm_flush_tx_path(mvm, msk, 0))
3754 			IWL_ERR(mvm, "flush request fail\n");
3755 		mutex_unlock(&mvm->mutex);
3756 	} else {
3757 		mutex_unlock(&mvm->mutex);
3758 
3759 		/* this can take a while, and we may need/want other operations
3760 		 * to succeed while doing this, so do it without the mutex held
3761 		 */
3762 		iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3763 	}
3764 }
3765 
3766 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3767 				  struct survey_info *survey)
3768 {
3769 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3770 	int ret;
3771 
3772 	memset(survey, 0, sizeof(*survey));
3773 
3774 	/* only support global statistics right now */
3775 	if (idx != 0)
3776 		return -ENOENT;
3777 
3778 	if (fw_has_capa(&mvm->fw->ucode_capa,
3779 			IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3780 		return -ENOENT;
3781 
3782 	mutex_lock(&mvm->mutex);
3783 
3784 	if (mvm->ucode_loaded) {
3785 		ret = iwl_mvm_request_statistics(mvm, false);
3786 		if (ret)
3787 			goto out;
3788 	}
3789 
3790 	survey->filled = SURVEY_INFO_TIME |
3791 			 SURVEY_INFO_TIME_RX |
3792 			 SURVEY_INFO_TIME_TX |
3793 			 SURVEY_INFO_TIME_SCAN;
3794 	survey->time = mvm->accu_radio_stats.on_time_rf +
3795 		       mvm->radio_stats.on_time_rf;
3796 	do_div(survey->time, USEC_PER_MSEC);
3797 
3798 	survey->time_rx = mvm->accu_radio_stats.rx_time +
3799 			  mvm->radio_stats.rx_time;
3800 	do_div(survey->time_rx, USEC_PER_MSEC);
3801 
3802 	survey->time_tx = mvm->accu_radio_stats.tx_time +
3803 			  mvm->radio_stats.tx_time;
3804 	do_div(survey->time_tx, USEC_PER_MSEC);
3805 
3806 	survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3807 			    mvm->radio_stats.on_time_scan;
3808 	do_div(survey->time_scan, USEC_PER_MSEC);
3809 
3810 	ret = 0;
3811  out:
3812 	mutex_unlock(&mvm->mutex);
3813 	return ret;
3814 }
3815 
3816 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3817 				       struct ieee80211_vif *vif,
3818 				       struct ieee80211_sta *sta,
3819 				       struct station_info *sinfo)
3820 {
3821 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3822 	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3823 	struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3824 
3825 	if (fw_has_capa(&mvm->fw->ucode_capa,
3826 			IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3827 		return;
3828 
3829 	/* if beacon filtering isn't on mac80211 does it anyway */
3830 	if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3831 		return;
3832 
3833 	if (!vif->bss_conf.assoc)
3834 		return;
3835 
3836 	mutex_lock(&mvm->mutex);
3837 
3838 	if (mvmvif->ap_sta_id != mvmsta->sta_id)
3839 		goto unlock;
3840 
3841 	if (iwl_mvm_request_statistics(mvm, false))
3842 		goto unlock;
3843 
3844 	sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3845 			   mvmvif->beacon_stats.accu_num_beacons;
3846 	sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3847 	if (mvmvif->beacon_stats.avg_signal) {
3848 		/* firmware only reports a value after RXing a few beacons */
3849 		sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3850 		sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3851 	}
3852  unlock:
3853 	mutex_unlock(&mvm->mutex);
3854 }
3855 
3856 static void iwl_mvm_event_mlme_callback(struct iwl_mvm *mvm,
3857 					struct ieee80211_vif *vif,
3858 					const struct ieee80211_event *event)
3859 {
3860 #define CHECK_MLME_TRIGGER(_mvm, _trig, _buf, _cnt, _fmt...)	\
3861 	do {							\
3862 		if ((_cnt) && --(_cnt))				\
3863 			break;					\
3864 		iwl_mvm_fw_dbg_collect_trig(_mvm, _trig, _fmt);\
3865 	} while (0)
3866 
3867 	struct iwl_fw_dbg_trigger_tlv *trig;
3868 	struct iwl_fw_dbg_trigger_mlme *trig_mlme;
3869 
3870 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_MLME))
3871 		return;
3872 
3873 	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_MLME);
3874 	trig_mlme = (void *)trig->data;
3875 	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3876 		return;
3877 
3878 	if (event->u.mlme.data == ASSOC_EVENT) {
3879 		if (event->u.mlme.status == MLME_DENIED)
3880 			CHECK_MLME_TRIGGER(mvm, trig, buf,
3881 					   trig_mlme->stop_assoc_denied,
3882 					   "DENIED ASSOC: reason %d",
3883 					    event->u.mlme.reason);
3884 		else if (event->u.mlme.status == MLME_TIMEOUT)
3885 			CHECK_MLME_TRIGGER(mvm, trig, buf,
3886 					   trig_mlme->stop_assoc_timeout,
3887 					   "ASSOC TIMEOUT");
3888 	} else if (event->u.mlme.data == AUTH_EVENT) {
3889 		if (event->u.mlme.status == MLME_DENIED)
3890 			CHECK_MLME_TRIGGER(mvm, trig, buf,
3891 					   trig_mlme->stop_auth_denied,
3892 					   "DENIED AUTH: reason %d",
3893 					   event->u.mlme.reason);
3894 		else if (event->u.mlme.status == MLME_TIMEOUT)
3895 			CHECK_MLME_TRIGGER(mvm, trig, buf,
3896 					   trig_mlme->stop_auth_timeout,
3897 					   "AUTH TIMEOUT");
3898 	} else if (event->u.mlme.data == DEAUTH_RX_EVENT) {
3899 		CHECK_MLME_TRIGGER(mvm, trig, buf,
3900 				   trig_mlme->stop_rx_deauth,
3901 				   "DEAUTH RX %d", event->u.mlme.reason);
3902 	} else if (event->u.mlme.data == DEAUTH_TX_EVENT) {
3903 		CHECK_MLME_TRIGGER(mvm, trig, buf,
3904 				   trig_mlme->stop_tx_deauth,
3905 				   "DEAUTH TX %d", event->u.mlme.reason);
3906 	}
3907 #undef CHECK_MLME_TRIGGER
3908 }
3909 
3910 static void iwl_mvm_event_bar_rx_callback(struct iwl_mvm *mvm,
3911 					  struct ieee80211_vif *vif,
3912 					  const struct ieee80211_event *event)
3913 {
3914 	struct iwl_fw_dbg_trigger_tlv *trig;
3915 	struct iwl_fw_dbg_trigger_ba *ba_trig;
3916 
3917 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
3918 		return;
3919 
3920 	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
3921 	ba_trig = (void *)trig->data;
3922 	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3923 		return;
3924 
3925 	if (!(le16_to_cpu(ba_trig->rx_bar) & BIT(event->u.ba.tid)))
3926 		return;
3927 
3928 	iwl_mvm_fw_dbg_collect_trig(mvm, trig,
3929 				    "BAR received from %pM, tid %d, ssn %d",
3930 				    event->u.ba.sta->addr, event->u.ba.tid,
3931 				    event->u.ba.ssn);
3932 }
3933 
3934 static void
3935 iwl_mvm_event_frame_timeout_callback(struct iwl_mvm *mvm,
3936 				     struct ieee80211_vif *vif,
3937 				     const struct ieee80211_event *event)
3938 {
3939 	struct iwl_fw_dbg_trigger_tlv *trig;
3940 	struct iwl_fw_dbg_trigger_ba *ba_trig;
3941 
3942 	if (!iwl_fw_dbg_trigger_enabled(mvm->fw, FW_DBG_TRIGGER_BA))
3943 		return;
3944 
3945 	trig = iwl_fw_dbg_get_trigger(mvm->fw, FW_DBG_TRIGGER_BA);
3946 	ba_trig = (void *)trig->data;
3947 	if (!iwl_fw_dbg_trigger_check_stop(mvm, vif, trig))
3948 		return;
3949 
3950 	if (!(le16_to_cpu(ba_trig->frame_timeout) & BIT(event->u.ba.tid)))
3951 		return;
3952 
3953 	iwl_mvm_fw_dbg_collect_trig(mvm, trig,
3954 				    "Frame from %pM timed out, tid %d",
3955 				    event->u.ba.sta->addr, event->u.ba.tid);
3956 }
3957 
3958 static void iwl_mvm_mac_event_callback(struct ieee80211_hw *hw,
3959 				       struct ieee80211_vif *vif,
3960 				       const struct ieee80211_event *event)
3961 {
3962 	struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3963 
3964 	switch (event->type) {
3965 	case MLME_EVENT:
3966 		iwl_mvm_event_mlme_callback(mvm, vif, event);
3967 		break;
3968 	case BAR_RX_EVENT:
3969 		iwl_mvm_event_bar_rx_callback(mvm, vif, event);
3970 		break;
3971 	case BA_FRAME_TIMEOUT:
3972 		iwl_mvm_event_frame_timeout_callback(mvm, vif, event);
3973 		break;
3974 	default:
3975 		break;
3976 	}
3977 }
3978 
3979 const struct ieee80211_ops iwl_mvm_hw_ops = {
3980 	.tx = iwl_mvm_mac_tx,
3981 	.ampdu_action = iwl_mvm_mac_ampdu_action,
3982 	.start = iwl_mvm_mac_start,
3983 	.reconfig_complete = iwl_mvm_mac_reconfig_complete,
3984 	.stop = iwl_mvm_mac_stop,
3985 	.add_interface = iwl_mvm_mac_add_interface,
3986 	.remove_interface = iwl_mvm_mac_remove_interface,
3987 	.config = iwl_mvm_mac_config,
3988 	.prepare_multicast = iwl_mvm_prepare_multicast,
3989 	.configure_filter = iwl_mvm_configure_filter,
3990 	.config_iface_filter = iwl_mvm_config_iface_filter,
3991 	.bss_info_changed = iwl_mvm_bss_info_changed,
3992 	.hw_scan = iwl_mvm_mac_hw_scan,
3993 	.cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3994 	.sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3995 	.sta_state = iwl_mvm_mac_sta_state,
3996 	.sta_notify = iwl_mvm_mac_sta_notify,
3997 	.allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3998 	.release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3999 	.set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
4000 	.sta_rc_update = iwl_mvm_sta_rc_update,
4001 	.conf_tx = iwl_mvm_mac_conf_tx,
4002 	.mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
4003 	.mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
4004 	.flush = iwl_mvm_mac_flush,
4005 	.sched_scan_start = iwl_mvm_mac_sched_scan_start,
4006 	.sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
4007 	.set_key = iwl_mvm_mac_set_key,
4008 	.update_tkip_key = iwl_mvm_mac_update_tkip_key,
4009 	.remain_on_channel = iwl_mvm_roc,
4010 	.cancel_remain_on_channel = iwl_mvm_cancel_roc,
4011 	.add_chanctx = iwl_mvm_add_chanctx,
4012 	.remove_chanctx = iwl_mvm_remove_chanctx,
4013 	.change_chanctx = iwl_mvm_change_chanctx,
4014 	.assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
4015 	.unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
4016 	.switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
4017 
4018 	.start_ap = iwl_mvm_start_ap_ibss,
4019 	.stop_ap = iwl_mvm_stop_ap_ibss,
4020 	.join_ibss = iwl_mvm_start_ap_ibss,
4021 	.leave_ibss = iwl_mvm_stop_ap_ibss,
4022 
4023 	.set_tim = iwl_mvm_set_tim,
4024 
4025 	.channel_switch = iwl_mvm_channel_switch,
4026 	.pre_channel_switch = iwl_mvm_pre_channel_switch,
4027 	.post_channel_switch = iwl_mvm_post_channel_switch,
4028 
4029 	.tdls_channel_switch = iwl_mvm_tdls_channel_switch,
4030 	.tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
4031 	.tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
4032 
4033 	.event_callback = iwl_mvm_mac_event_callback,
4034 
4035 	CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
4036 
4037 #ifdef CONFIG_PM_SLEEP
4038 	/* look at d3.c */
4039 	.suspend = iwl_mvm_suspend,
4040 	.resume = iwl_mvm_resume,
4041 	.set_wakeup = iwl_mvm_set_wakeup,
4042 	.set_rekey_data = iwl_mvm_set_rekey_data,
4043 #if IS_ENABLED(CONFIG_IPV6)
4044 	.ipv6_addr_change = iwl_mvm_ipv6_addr_change,
4045 #endif
4046 	.set_default_unicast_key = iwl_mvm_set_default_unicast_key,
4047 #endif
4048 	.get_survey = iwl_mvm_mac_get_survey,
4049 	.sta_statistics = iwl_mvm_mac_sta_statistics,
4050 };
4051