e880f9d4717ba4de642916e252bfaf7279ade237
[cascardo/linux.git] / drivers / net / wireless / iwlwifi / mvm / mac80211.c
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  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of version 2 of the GNU General Public License as
13  * published by the Free Software Foundation.
14  *
15  * This program is distributed in the hope that it will be useful, but
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21  * along with this program; if not, write to the Free Software
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23  * USA
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26  * in the file called COPYING.
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31  *
32  * BSD LICENSE
33  *
34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36  * All rights reserved.
37  *
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39  * modification, are permitted provided that the following conditions
40  * are met:
41  *
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43  *    notice, this list of conditions and the following disclaimer.
44  *  * Redistributions in binary form must reproduce the above copyright
45  *    notice, this list of conditions and the following disclaimer in
46  *    the documentation and/or other materials provided with the
47  *    distribution.
48  *  * Neither the name Intel Corporation nor the names of its
49  *    contributors may be used to endorse or promote products derived
50  *    from this software without specific prior written permission.
51  *
52  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63  *
64  *****************************************************************************/
65 #include <linux/kernel.h>
66 #include <linux/slab.h>
67 #include <linux/skbuff.h>
68 #include <linux/netdevice.h>
69 #include <linux/etherdevice.h>
70 #include <linux/ip.h>
71 #include <linux/if_arp.h>
72 #include <linux/devcoredump.h>
73 #include <net/mac80211.h>
74 #include <net/ieee80211_radiotap.h>
75 #include <net/tcp.h>
76
77 #include "iwl-op-mode.h"
78 #include "iwl-io.h"
79 #include "mvm.h"
80 #include "sta.h"
81 #include "time-event.h"
82 #include "iwl-eeprom-parse.h"
83 #include "fw-api-scan.h"
84 #include "iwl-phy-db.h"
85 #include "testmode.h"
86 #include "iwl-fw-error-dump.h"
87 #include "iwl-prph.h"
88
89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
90         {
91                 .max = 1,
92                 .types = BIT(NL80211_IFTYPE_STATION),
93         },
94         {
95                 .max = 1,
96                 .types = BIT(NL80211_IFTYPE_AP) |
97                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
98                         BIT(NL80211_IFTYPE_P2P_GO),
99         },
100         {
101                 .max = 1,
102                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
103         },
104 };
105
106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
107         {
108                 .num_different_channels = 1,
109                 .max_interfaces = 3,
110                 .limits = iwl_mvm_limits,
111                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
112         },
113 };
114
115 #ifdef CONFIG_PM_SLEEP
116 static const struct nl80211_wowlan_tcp_data_token_feature
117 iwl_mvm_wowlan_tcp_token_feature = {
118         .min_len = 0,
119         .max_len = 255,
120         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
121 };
122
123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
124         .tok = &iwl_mvm_wowlan_tcp_token_feature,
125         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
126                             sizeof(struct ethhdr) -
127                             sizeof(struct iphdr) -
128                             sizeof(struct tcphdr),
129         .data_interval_max = 65535, /* __le16 in API */
130         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
131                             sizeof(struct ethhdr) -
132                             sizeof(struct iphdr) -
133                             sizeof(struct tcphdr),
134         .seq = true,
135 };
136 #endif
137
138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
139 /*
140  * Use the reserved field to indicate magic values.
141  * these values will only be used internally by the driver,
142  * and won't make it to the fw (reserved will be 0).
143  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
144  *      be the vif's ip address. in case there is not a single
145  *      ip address (0, or more than 1), this attribute will
146  *      be skipped.
147  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
148  *      the LSB bytes of the vif's mac address
149  */
150 enum {
151         BC_FILTER_MAGIC_NONE = 0,
152         BC_FILTER_MAGIC_IP,
153         BC_FILTER_MAGIC_MAC,
154 };
155
156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
157         {
158                 /* arp */
159                 .discard = 0,
160                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
161                 .attrs = {
162                         {
163                                 /* frame type - arp, hw type - ethernet */
164                                 .offset_type =
165                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
166                                 .offset = sizeof(rfc1042_header),
167                                 .val = cpu_to_be32(0x08060001),
168                                 .mask = cpu_to_be32(0xffffffff),
169                         },
170                         {
171                                 /* arp dest ip */
172                                 .offset_type =
173                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
174                                 .offset = sizeof(rfc1042_header) + 2 +
175                                           sizeof(struct arphdr) +
176                                           ETH_ALEN + sizeof(__be32) +
177                                           ETH_ALEN,
178                                 .mask = cpu_to_be32(0xffffffff),
179                                 /* mark it as special field */
180                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
181                         },
182                 },
183         },
184         {
185                 /* dhcp offer bcast */
186                 .discard = 0,
187                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
188                 .attrs = {
189                         {
190                                 /* udp dest port - 68 (bootp client)*/
191                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
192                                 .offset = offsetof(struct udphdr, dest),
193                                 .val = cpu_to_be32(0x00440000),
194                                 .mask = cpu_to_be32(0xffff0000),
195                         },
196                         {
197                                 /* dhcp - lsb bytes of client hw address */
198                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
199                                 .offset = 38,
200                                 .mask = cpu_to_be32(0xffffffff),
201                                 /* mark it as special field */
202                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
203                         },
204                 },
205         },
206         /* last filter must be empty */
207         {},
208 };
209 #endif
210
211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
212 {
213         if (!iwl_mvm_is_d0i3_supported(mvm))
214                 return;
215
216         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
217         spin_lock_bh(&mvm->refs_lock);
218         mvm->refs[ref_type]++;
219         spin_unlock_bh(&mvm->refs_lock);
220         iwl_trans_ref(mvm->trans);
221 }
222
223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
224 {
225         if (!iwl_mvm_is_d0i3_supported(mvm))
226                 return;
227
228         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
229         spin_lock_bh(&mvm->refs_lock);
230         WARN_ON(!mvm->refs[ref_type]--);
231         spin_unlock_bh(&mvm->refs_lock);
232         iwl_trans_unref(mvm->trans);
233 }
234
235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
236                                      enum iwl_mvm_ref_type except_ref)
237 {
238         int i, j;
239
240         if (!iwl_mvm_is_d0i3_supported(mvm))
241                 return;
242
243         spin_lock_bh(&mvm->refs_lock);
244         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
245                 if (except_ref == i || !mvm->refs[i])
246                         continue;
247
248                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
249                               i, mvm->refs[i]);
250                 for (j = 0; j < mvm->refs[i]; j++)
251                         iwl_trans_unref(mvm->trans);
252                 mvm->refs[i] = 0;
253         }
254         spin_unlock_bh(&mvm->refs_lock);
255 }
256
257 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
258 {
259         int i;
260         bool taken = false;
261
262         if (!iwl_mvm_is_d0i3_supported(mvm))
263                 return true;
264
265         spin_lock_bh(&mvm->refs_lock);
266         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
267                 if (mvm->refs[i]) {
268                         taken = true;
269                         break;
270                 }
271         }
272         spin_unlock_bh(&mvm->refs_lock);
273
274         return taken;
275 }
276
277 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
278 {
279         iwl_mvm_ref(mvm, ref_type);
280
281         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
282                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
283                                 HZ)) {
284                 WARN_ON_ONCE(1);
285                 iwl_mvm_unref(mvm, ref_type);
286                 return -EIO;
287         }
288
289         return 0;
290 }
291
292 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
293 {
294         int i;
295
296         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
297         for (i = 0; i < NUM_PHY_CTX; i++) {
298                 mvm->phy_ctxts[i].id = i;
299                 mvm->phy_ctxts[i].ref = 0;
300         }
301 }
302
303 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
304 {
305         struct ieee80211_hw *hw = mvm->hw;
306         int num_mac, ret, i;
307
308         /* Tell mac80211 our characteristics */
309         hw->flags = IEEE80211_HW_SIGNAL_DBM |
310                     IEEE80211_HW_SPECTRUM_MGMT |
311                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
312                     IEEE80211_HW_QUEUE_CONTROL |
313                     IEEE80211_HW_WANT_MONITOR_VIF |
314                     IEEE80211_HW_SUPPORTS_PS |
315                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
316                     IEEE80211_HW_AMPDU_AGGREGATION |
317                     IEEE80211_HW_TIMING_BEACON_ONLY |
318                     IEEE80211_HW_CONNECTION_MONITOR |
319                     IEEE80211_HW_CHANCTX_STA_CSA |
320                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
321
322         hw->queues = mvm->first_agg_queue;
323         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
324         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
325                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
326         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
327                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
328         hw->rate_control_algorithm = "iwl-mvm-rs";
329
330         /*
331          * Enable 11w if advertised by firmware and software crypto
332          * is not enabled (as the firmware will interpret some mgmt
333          * packets, so enabling it with software crypto isn't safe)
334          */
335         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
336             !iwlwifi_mod_params.sw_crypto)
337                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
338
339         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
340             !iwlwifi_mod_params.uapsd_disable) {
341                 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
342                 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
343                 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
344         }
345
346         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
347             mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
348                 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
349                 hw->wiphy->features |=
350                         NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
351                         NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
352         }
353
354         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
355         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
356         hw->chanctx_data_size = sizeof(u16);
357
358         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
359                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
360                 BIT(NL80211_IFTYPE_AP) |
361                 BIT(NL80211_IFTYPE_P2P_GO) |
362                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
363                 BIT(NL80211_IFTYPE_ADHOC);
364
365         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
366         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
367                                        REGULATORY_DISABLE_BEACON_HINTS;
368
369         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
370                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
371
372         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
373
374         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
375         hw->wiphy->n_iface_combinations =
376                 ARRAY_SIZE(iwl_mvm_iface_combinations);
377
378         hw->wiphy->max_remain_on_channel_duration = 10000;
379         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
380
381         /* Extract MAC address */
382         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
383         hw->wiphy->addresses = mvm->addresses;
384         hw->wiphy->n_addresses = 1;
385
386         /* Extract additional MAC addresses if available */
387         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
388                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
389
390         for (i = 1; i < num_mac; i++) {
391                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
392                        ETH_ALEN);
393                 mvm->addresses[i].addr[5]++;
394                 hw->wiphy->n_addresses++;
395         }
396
397         iwl_mvm_reset_phy_ctxts(mvm);
398
399         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
400
401         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
402
403         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
404                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
405                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
406         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
407                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
408                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
409
410         hw->wiphy->hw_version = mvm->trans->hw_id;
411
412         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
413                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
414         else
415                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
416
417         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
418                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
419                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
420                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
421                 /* we create the 802.11 header and zero length SSID IE. */
422                 hw->wiphy->max_sched_scan_ie_len =
423                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
424         }
425
426         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
427                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
428                                NL80211_FEATURE_P2P_GO_OPPPS |
429                                NL80211_FEATURE_DYNAMIC_SMPS |
430                                NL80211_FEATURE_STATIC_SMPS |
431                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
432
433         if (mvm->fw->ucode_capa.capa[0] &
434             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
435                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
436         if (mvm->fw->ucode_capa.capa[0] &
437             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
438                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
439
440         if (mvm->fw->ucode_capa.capa[0] &
441             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
442                 hw->wiphy->features |=
443                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
444
445         if (mvm->fw->ucode_capa.capa[0] &
446             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
447                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
448
449         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
450
451         /* currently FW API supports only one optional cipher scheme */
452         if (mvm->fw->cs[0].cipher) {
453                 mvm->hw->n_cipher_schemes = 1;
454                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
455         }
456
457 #ifdef CONFIG_PM_SLEEP
458         if (iwl_mvm_is_d0i3_supported(mvm) &&
459             device_can_wakeup(mvm->trans->dev)) {
460                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
461                 hw->wiphy->wowlan = &mvm->wowlan;
462         } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
463             mvm->trans->ops->d3_suspend &&
464             mvm->trans->ops->d3_resume &&
465             device_can_wakeup(mvm->trans->dev)) {
466                 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
467                                     WIPHY_WOWLAN_DISCONNECT |
468                                     WIPHY_WOWLAN_EAP_IDENTITY_REQ |
469                                     WIPHY_WOWLAN_RFKILL_RELEASE |
470                                     WIPHY_WOWLAN_NET_DETECT;
471                 if (!iwlwifi_mod_params.sw_crypto)
472                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
473                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
474                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
475
476                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
477                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
478                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
479                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
480                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
481                 hw->wiphy->wowlan = &mvm->wowlan;
482         }
483 #endif
484
485 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
486         /* assign default bcast filtering configuration */
487         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
488 #endif
489
490         ret = iwl_mvm_leds_init(mvm);
491         if (ret)
492                 return ret;
493
494         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
495                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
496                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
497         }
498
499         if (mvm->fw->ucode_capa.capa[0] &
500             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
501                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
502                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
503         }
504
505         ret = ieee80211_register_hw(mvm->hw);
506         if (ret)
507                 iwl_mvm_leds_exit(mvm);
508
509         return ret;
510 }
511
512 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
513                              struct ieee80211_sta *sta,
514                              struct sk_buff *skb)
515 {
516         struct iwl_mvm_sta *mvmsta;
517         bool defer = false;
518
519         /*
520          * double check the IN_D0I3 flag both before and after
521          * taking the spinlock, in order to prevent taking
522          * the spinlock when not needed.
523          */
524         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
525                 return false;
526
527         spin_lock(&mvm->d0i3_tx_lock);
528         /*
529          * testing the flag again ensures the skb dequeue
530          * loop (on d0i3 exit) hasn't run yet.
531          */
532         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
533                 goto out;
534
535         mvmsta = iwl_mvm_sta_from_mac80211(sta);
536         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
537             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
538                 goto out;
539
540         __skb_queue_tail(&mvm->d0i3_tx, skb);
541         ieee80211_stop_queues(mvm->hw);
542
543         /* trigger wakeup */
544         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
545         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
546
547         defer = true;
548 out:
549         spin_unlock(&mvm->d0i3_tx_lock);
550         return defer;
551 }
552
553 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
554                            struct ieee80211_tx_control *control,
555                            struct sk_buff *skb)
556 {
557         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
558         struct ieee80211_sta *sta = control->sta;
559         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
560         struct ieee80211_hdr *hdr = (void *)skb->data;
561
562         if (iwl_mvm_is_radio_killed(mvm)) {
563                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
564                 goto drop;
565         }
566
567         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
568             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
569             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
570                 goto drop;
571
572         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
573         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
574                      ieee80211_is_mgmt(hdr->frame_control) &&
575                      !ieee80211_is_deauth(hdr->frame_control) &&
576                      !ieee80211_is_disassoc(hdr->frame_control) &&
577                      !ieee80211_is_action(hdr->frame_control)))
578                 sta = NULL;
579
580         if (sta) {
581                 if (iwl_mvm_defer_tx(mvm, sta, skb))
582                         return;
583                 if (iwl_mvm_tx_skb(mvm, skb, sta))
584                         goto drop;
585                 return;
586         }
587
588         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
589                 goto drop;
590         return;
591  drop:
592         ieee80211_free_txskb(hw, skb);
593 }
594
595 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
596 {
597         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
598                 return false;
599         return true;
600 }
601
602 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
603 {
604         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
605                 return false;
606         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
607                 return true;
608
609         /* enabled by default */
610         return true;
611 }
612
613 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
614                                     struct ieee80211_vif *vif,
615                                     enum ieee80211_ampdu_mlme_action action,
616                                     struct ieee80211_sta *sta, u16 tid,
617                                     u16 *ssn, u8 buf_size)
618 {
619         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
620         int ret;
621         bool tx_agg_ref = false;
622
623         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
624                      sta->addr, tid, action);
625
626         if (!(mvm->nvm_data->sku_cap_11n_enable))
627                 return -EACCES;
628
629         /* return from D0i3 before starting a new Tx aggregation */
630         switch (action) {
631         case IEEE80211_AMPDU_TX_START:
632         case IEEE80211_AMPDU_TX_STOP_CONT:
633         case IEEE80211_AMPDU_TX_STOP_FLUSH:
634         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
635         case IEEE80211_AMPDU_TX_OPERATIONAL:
636                 /*
637                  * for tx start, wait synchronously until D0i3 exit to
638                  * get the correct sequence number for the tid.
639                  * additionally, some other ampdu actions use direct
640                  * target access, which is not handled automatically
641                  * by the trans layer (unlike commands), so wait for
642                  * d0i3 exit in these cases as well.
643                  */
644                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
645                 if (ret)
646                         return ret;
647
648                 tx_agg_ref = true;
649                 break;
650         default:
651                 break;
652         }
653
654         mutex_lock(&mvm->mutex);
655
656         switch (action) {
657         case IEEE80211_AMPDU_RX_START:
658                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
659                         ret = -EINVAL;
660                         break;
661                 }
662                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
663                 break;
664         case IEEE80211_AMPDU_RX_STOP:
665                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
666                 break;
667         case IEEE80211_AMPDU_TX_START:
668                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
669                         ret = -EINVAL;
670                         break;
671                 }
672                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
673                 break;
674         case IEEE80211_AMPDU_TX_STOP_CONT:
675                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
676                 break;
677         case IEEE80211_AMPDU_TX_STOP_FLUSH:
678         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
679                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
680                 break;
681         case IEEE80211_AMPDU_TX_OPERATIONAL:
682                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
683                 break;
684         default:
685                 WARN_ON_ONCE(1);
686                 ret = -EINVAL;
687                 break;
688         }
689         mutex_unlock(&mvm->mutex);
690
691         /*
692          * If the tid is marked as started, we won't use it for offloaded
693          * traffic on the next D0i3 entry. It's safe to unref.
694          */
695         if (tx_agg_ref)
696                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
697
698         return ret;
699 }
700
701 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
702                                      struct ieee80211_vif *vif)
703 {
704         struct iwl_mvm *mvm = data;
705         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
706
707         mvmvif->uploaded = false;
708         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
709
710         /* does this make sense at all? */
711         mvmvif->color++;
712
713         spin_lock_bh(&mvm->time_event_lock);
714         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
715         spin_unlock_bh(&mvm->time_event_lock);
716
717         mvmvif->phy_ctxt = NULL;
718         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
719 }
720
721 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
722                                      const void *data, size_t datalen)
723 {
724         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
725         ssize_t bytes_read;
726         ssize_t bytes_read_trans;
727
728         if (offset < dump_ptrs->op_mode_len) {
729                 bytes_read = min_t(ssize_t, count,
730                                    dump_ptrs->op_mode_len - offset);
731                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
732                        bytes_read);
733                 offset += bytes_read;
734                 count -= bytes_read;
735
736                 if (count == 0)
737                         return bytes_read;
738         } else {
739                 bytes_read = 0;
740         }
741
742         if (!dump_ptrs->trans_ptr)
743                 return bytes_read;
744
745         offset -= dump_ptrs->op_mode_len;
746         bytes_read_trans = min_t(ssize_t, count,
747                                  dump_ptrs->trans_ptr->len - offset);
748         memcpy(buffer + bytes_read,
749                (u8 *)dump_ptrs->trans_ptr->data + offset,
750                bytes_read_trans);
751
752         return bytes_read + bytes_read_trans;
753 }
754
755 static void iwl_mvm_free_coredump(const void *data)
756 {
757         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
758
759         vfree(fw_error_dump->op_mode_ptr);
760         vfree(fw_error_dump->trans_ptr);
761         kfree(fw_error_dump);
762 }
763
764 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
765 {
766         struct iwl_fw_error_dump_file *dump_file;
767         struct iwl_fw_error_dump_data *dump_data;
768         struct iwl_fw_error_dump_info *dump_info;
769         struct iwl_mvm_dump_ptrs *fw_error_dump;
770         const struct fw_img *img;
771         u32 sram_len, sram_ofs;
772         u32 file_len, rxf_len;
773         unsigned long flags;
774         int reg_val;
775
776         lockdep_assert_held(&mvm->mutex);
777
778         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
779         if (!fw_error_dump)
780                 return;
781
782         img = &mvm->fw->img[mvm->cur_ucode];
783         sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
784         sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
785
786         /* reading buffer size */
787         reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
788         rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
789
790         /* the register holds the value divided by 128 */
791         rxf_len = rxf_len << 7;
792
793         file_len = sizeof(*dump_file) +
794                    sizeof(*dump_data) * 3 +
795                    sram_len +
796                    rxf_len +
797                    sizeof(*dump_info);
798
799         dump_file = vzalloc(file_len);
800         if (!dump_file) {
801                 kfree(fw_error_dump);
802                 return;
803         }
804
805         fw_error_dump->op_mode_ptr = dump_file;
806
807         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
808         dump_data = (void *)dump_file->data;
809
810         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
811         dump_data->len = cpu_to_le32(sizeof(*dump_info));
812         dump_info = (void *) dump_data->data;
813         dump_info->device_family =
814                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
815                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
816                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
817         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
818                sizeof(dump_info->fw_human_readable));
819         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
820                 sizeof(dump_info->dev_human_readable));
821         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
822                 sizeof(dump_info->bus_human_readable));
823
824         dump_data = iwl_fw_error_next_data(dump_data);
825         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
826         dump_data->len = cpu_to_le32(rxf_len);
827
828         if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
829                 u32 *rxf = (void *)dump_data->data;
830                 int i;
831
832                 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
833                         iwl_trans_write_prph(mvm->trans,
834                                              RXF_LD_FENCE_OFFSET_ADDR,
835                                              i * sizeof(u32));
836                         rxf[i] = iwl_trans_read_prph(mvm->trans,
837                                                      RXF_FIFO_RD_FENCE_ADDR);
838                 }
839                 iwl_trans_release_nic_access(mvm->trans, &flags);
840         }
841
842         dump_data = iwl_fw_error_next_data(dump_data);
843         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
844         dump_data->len = cpu_to_le32(sram_len);
845         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
846                                  sram_len);
847
848         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
849         fw_error_dump->op_mode_len = file_len;
850         if (fw_error_dump->trans_ptr)
851                 file_len += fw_error_dump->trans_ptr->len;
852         dump_file->file_len = cpu_to_le32(file_len);
853
854         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
855                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
856 }
857
858 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
859 {
860         /* clear the D3 reconfig, we only need it to avoid dumping a
861          * firmware coredump on reconfiguration, we shouldn't do that
862          * on D3->D0 transition
863          */
864         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
865                 iwl_mvm_fw_error_dump(mvm);
866
867         iwl_trans_stop_device(mvm->trans);
868
869         mvm->scan_status = IWL_MVM_SCAN_NONE;
870         mvm->ps_disabled = false;
871         mvm->calibrating = false;
872
873         /* just in case one was running */
874         ieee80211_remain_on_channel_expired(mvm->hw);
875
876         ieee80211_iterate_active_interfaces_atomic(
877                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
878                 iwl_mvm_cleanup_iterator, mvm);
879
880         mvm->p2p_device_vif = NULL;
881         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
882
883         iwl_mvm_reset_phy_ctxts(mvm);
884         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
885         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
886         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
887         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
888         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
889         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
890         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
891         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
892         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
893
894         ieee80211_wake_queues(mvm->hw);
895
896         /* cleanup all stale references (scan, roc), but keep the
897          * ucode_down ref until reconfig is complete */
898         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
899
900         /* clear any stale d0i3 state */
901         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
902
903         mvm->vif_count = 0;
904         mvm->rx_ba_sessions = 0;
905 }
906
907 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
908 {
909         int ret;
910
911         lockdep_assert_held(&mvm->mutex);
912
913         /* Clean up some internal and mac80211 state on restart */
914         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
915                 iwl_mvm_restart_cleanup(mvm);
916
917         ret = iwl_mvm_up(mvm);
918
919         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
920                 /* Something went wrong - we need to finish some cleanup
921                  * that normally iwl_mvm_mac_restart_complete() below
922                  * would do.
923                  */
924                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
925                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
926         }
927
928         return ret;
929 }
930
931 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
932 {
933         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
934         int ret;
935
936         mutex_lock(&mvm->mutex);
937         ret = __iwl_mvm_mac_start(mvm);
938         mutex_unlock(&mvm->mutex);
939
940         return ret;
941 }
942
943 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
944 {
945         int ret;
946
947         mutex_lock(&mvm->mutex);
948
949         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
950         iwl_mvm_d0i3_enable_tx(mvm, NULL);
951         ret = iwl_mvm_update_quotas(mvm, NULL);
952         if (ret)
953                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
954                         ret);
955
956         /* allow transport/FW low power modes */
957         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
958
959         /*
960          * If we have TDLS peers, remove them. We don't know the last seqno/PN
961          * of packets the FW sent out, so we must reconnect.
962          */
963         iwl_mvm_teardown_tdls_peers(mvm);
964
965         mutex_unlock(&mvm->mutex);
966 }
967
968 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
969 {
970         bool exit_now;
971
972         if (!iwl_mvm_is_d0i3_supported(mvm))
973                 return;
974
975         mutex_lock(&mvm->d0i3_suspend_mutex);
976         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
977         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
978                                         &mvm->d0i3_suspend_flags);
979         mutex_unlock(&mvm->d0i3_suspend_mutex);
980
981         if (exit_now) {
982                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
983                 _iwl_mvm_exit_d0i3(mvm);
984         }
985 }
986
987 static void
988 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
989                               enum ieee80211_reconfig_type reconfig_type)
990 {
991         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
992
993         switch (reconfig_type) {
994         case IEEE80211_RECONFIG_TYPE_RESTART:
995                 iwl_mvm_restart_complete(mvm);
996                 break;
997         case IEEE80211_RECONFIG_TYPE_SUSPEND:
998                 iwl_mvm_resume_complete(mvm);
999                 break;
1000         }
1001 }
1002
1003 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1004 {
1005         lockdep_assert_held(&mvm->mutex);
1006
1007         /*
1008          * Disallow low power states when the FW is down by taking
1009          * the UCODE_DOWN ref. in case of ongoing hw restart the
1010          * ref is already taken, so don't take it again.
1011          */
1012         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1013                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1014
1015         /* async_handlers_wk is now blocked */
1016
1017         /*
1018          * The work item could be running or queued if the
1019          * ROC time event stops just as we get here.
1020          */
1021         cancel_work_sync(&mvm->roc_done_wk);
1022
1023         iwl_trans_stop_device(mvm->trans);
1024
1025         iwl_mvm_async_handlers_purge(mvm);
1026         /* async_handlers_list is empty and will stay empty: HW is stopped */
1027
1028         /* the fw is stopped, the aux sta is dead: clean up driver state */
1029         iwl_mvm_del_aux_sta(mvm);
1030
1031         /*
1032          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1033          * won't be called in this case).
1034          */
1035         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1036
1037         mvm->ucode_loaded = false;
1038 }
1039
1040 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1041 {
1042         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1043
1044         flush_work(&mvm->d0i3_exit_work);
1045         flush_work(&mvm->async_handlers_wk);
1046         flush_work(&mvm->fw_error_dump_wk);
1047
1048         mutex_lock(&mvm->mutex);
1049         __iwl_mvm_mac_stop(mvm);
1050         mutex_unlock(&mvm->mutex);
1051
1052         /*
1053          * The worker might have been waiting for the mutex, let it run and
1054          * discover that its list is now empty.
1055          */
1056         cancel_work_sync(&mvm->async_handlers_wk);
1057 }
1058
1059 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1060 {
1061         u16 i;
1062
1063         lockdep_assert_held(&mvm->mutex);
1064
1065         for (i = 0; i < NUM_PHY_CTX; i++)
1066                 if (!mvm->phy_ctxts[i].ref)
1067                         return &mvm->phy_ctxts[i];
1068
1069         IWL_ERR(mvm, "No available PHY context\n");
1070         return NULL;
1071 }
1072
1073 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1074                                 s8 tx_power)
1075 {
1076         /* FW is in charge of regulatory enforcement */
1077         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1078                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1079                 .pwr_restriction = cpu_to_le16(tx_power),
1080         };
1081
1082         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1083                                     sizeof(reduce_txpwr_cmd),
1084                                     &reduce_txpwr_cmd);
1085 }
1086
1087 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1088                                      struct ieee80211_vif *vif)
1089 {
1090         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1091         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1092         int ret;
1093
1094         /*
1095          * make sure D0i3 exit is completed, otherwise a target access
1096          * during tx queue configuration could be done when still in
1097          * D0i3 state.
1098          */
1099         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1100         if (ret)
1101                 return ret;
1102
1103         /*
1104          * Not much to do here. The stack will not allow interface
1105          * types or combinations that we didn't advertise, so we
1106          * don't really have to check the types.
1107          */
1108
1109         mutex_lock(&mvm->mutex);
1110
1111         /* Allocate resources for the MAC context, and add it to the fw  */
1112         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1113         if (ret)
1114                 goto out_unlock;
1115
1116         /* Counting number of interfaces is needed for legacy PM */
1117         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1118                 mvm->vif_count++;
1119
1120         /*
1121          * The AP binding flow can be done only after the beacon
1122          * template is configured (which happens only in the mac80211
1123          * start_ap() flow), and adding the broadcast station can happen
1124          * only after the binding.
1125          * In addition, since modifying the MAC before adding a bcast
1126          * station is not allowed by the FW, delay the adding of MAC context to
1127          * the point where we can also add the bcast station.
1128          * In short: there's not much we can do at this point, other than
1129          * allocating resources :)
1130          */
1131         if (vif->type == NL80211_IFTYPE_AP ||
1132             vif->type == NL80211_IFTYPE_ADHOC) {
1133                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1134                 if (ret) {
1135                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1136                         goto out_release;
1137                 }
1138
1139                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1140                 goto out_unlock;
1141         }
1142
1143         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1144         if (ret)
1145                 goto out_release;
1146
1147         ret = iwl_mvm_power_update_mac(mvm);
1148         if (ret)
1149                 goto out_release;
1150
1151         /* beacon filtering */
1152         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1153         if (ret)
1154                 goto out_remove_mac;
1155
1156         if (!mvm->bf_allowed_vif &&
1157             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1158                 mvm->bf_allowed_vif = mvmvif;
1159                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1160                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1161         }
1162
1163         /*
1164          * P2P_DEVICE interface does not have a channel context assigned to it,
1165          * so a dedicated PHY context is allocated to it and the corresponding
1166          * MAC context is bound to it at this stage.
1167          */
1168         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1169
1170                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1171                 if (!mvmvif->phy_ctxt) {
1172                         ret = -ENOSPC;
1173                         goto out_free_bf;
1174                 }
1175
1176                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1177                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1178                 if (ret)
1179                         goto out_unref_phy;
1180
1181                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1182                 if (ret)
1183                         goto out_unbind;
1184
1185                 /* Save a pointer to p2p device vif, so it can later be used to
1186                  * update the p2p device MAC when a GO is started/stopped */
1187                 mvm->p2p_device_vif = vif;
1188         }
1189
1190         iwl_mvm_vif_dbgfs_register(mvm, vif);
1191         goto out_unlock;
1192
1193  out_unbind:
1194         iwl_mvm_binding_remove_vif(mvm, vif);
1195  out_unref_phy:
1196         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1197  out_free_bf:
1198         if (mvm->bf_allowed_vif == mvmvif) {
1199                 mvm->bf_allowed_vif = NULL;
1200                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1201                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1202         }
1203  out_remove_mac:
1204         mvmvif->phy_ctxt = NULL;
1205         iwl_mvm_mac_ctxt_remove(mvm, vif);
1206  out_release:
1207         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1208                 mvm->vif_count--;
1209
1210         iwl_mvm_mac_ctxt_release(mvm, vif);
1211  out_unlock:
1212         mutex_unlock(&mvm->mutex);
1213
1214         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1215
1216         return ret;
1217 }
1218
1219 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1220                                         struct ieee80211_vif *vif)
1221 {
1222         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1223
1224         if (tfd_msk) {
1225                 mutex_lock(&mvm->mutex);
1226                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1227                 mutex_unlock(&mvm->mutex);
1228         }
1229
1230         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1231                 /*
1232                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1233                  * We assume here that all the packets sent to the OFFCHANNEL
1234                  * queue are sent in ROC session.
1235                  */
1236                 flush_work(&mvm->roc_done_wk);
1237         } else {
1238                 /*
1239                  * By now, all the AC queues are empty. The AGG queues are
1240                  * empty too. We already got all the Tx responses for all the
1241                  * packets in the queues. The drain work can have been
1242                  * triggered. Flush it.
1243                  */
1244                 flush_work(&mvm->sta_drained_wk);
1245         }
1246 }
1247
1248 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1249                                          struct ieee80211_vif *vif)
1250 {
1251         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1252         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1253
1254         iwl_mvm_prepare_mac_removal(mvm, vif);
1255
1256         mutex_lock(&mvm->mutex);
1257
1258         if (mvm->bf_allowed_vif == mvmvif) {
1259                 mvm->bf_allowed_vif = NULL;
1260                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1261                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1262         }
1263
1264         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1265
1266         /*
1267          * For AP/GO interface, the tear down of the resources allocated to the
1268          * interface is be handled as part of the stop_ap flow.
1269          */
1270         if (vif->type == NL80211_IFTYPE_AP ||
1271             vif->type == NL80211_IFTYPE_ADHOC) {
1272 #ifdef CONFIG_NL80211_TESTMODE
1273                 if (vif == mvm->noa_vif) {
1274                         mvm->noa_vif = NULL;
1275                         mvm->noa_duration = 0;
1276                 }
1277 #endif
1278                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1279                 goto out_release;
1280         }
1281
1282         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1283                 mvm->p2p_device_vif = NULL;
1284                 iwl_mvm_rm_bcast_sta(mvm, vif);
1285                 iwl_mvm_binding_remove_vif(mvm, vif);
1286                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1287                 mvmvif->phy_ctxt = NULL;
1288         }
1289
1290         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1291                 mvm->vif_count--;
1292
1293         iwl_mvm_power_update_mac(mvm);
1294         iwl_mvm_mac_ctxt_remove(mvm, vif);
1295
1296 out_release:
1297         iwl_mvm_mac_ctxt_release(mvm, vif);
1298         mutex_unlock(&mvm->mutex);
1299 }
1300
1301 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1302 {
1303         return 0;
1304 }
1305
1306 struct iwl_mvm_mc_iter_data {
1307         struct iwl_mvm *mvm;
1308         int port_id;
1309 };
1310
1311 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1312                                       struct ieee80211_vif *vif)
1313 {
1314         struct iwl_mvm_mc_iter_data *data = _data;
1315         struct iwl_mvm *mvm = data->mvm;
1316         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1317         int ret, len;
1318
1319         /* if we don't have free ports, mcast frames will be dropped */
1320         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1321                 return;
1322
1323         if (vif->type != NL80211_IFTYPE_STATION ||
1324             !vif->bss_conf.assoc)
1325                 return;
1326
1327         cmd->port_id = data->port_id++;
1328         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1329         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1330
1331         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1332         if (ret)
1333                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1334 }
1335
1336 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1337 {
1338         struct iwl_mvm_mc_iter_data iter_data = {
1339                 .mvm = mvm,
1340         };
1341
1342         lockdep_assert_held(&mvm->mutex);
1343
1344         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1345                 return;
1346
1347         ieee80211_iterate_active_interfaces_atomic(
1348                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1349                 iwl_mvm_mc_iface_iterator, &iter_data);
1350 }
1351
1352 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1353                                      struct netdev_hw_addr_list *mc_list)
1354 {
1355         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1356         struct iwl_mcast_filter_cmd *cmd;
1357         struct netdev_hw_addr *addr;
1358         int addr_count;
1359         bool pass_all;
1360         int len;
1361
1362         addr_count = netdev_hw_addr_list_count(mc_list);
1363         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1364                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1365         if (pass_all)
1366                 addr_count = 0;
1367
1368         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1369         cmd = kzalloc(len, GFP_ATOMIC);
1370         if (!cmd)
1371                 return 0;
1372
1373         if (pass_all) {
1374                 cmd->pass_all = 1;
1375                 return (u64)(unsigned long)cmd;
1376         }
1377
1378         netdev_hw_addr_list_for_each(addr, mc_list) {
1379                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1380                                    cmd->count, addr->addr);
1381                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1382                        addr->addr, ETH_ALEN);
1383                 cmd->count++;
1384         }
1385
1386         return (u64)(unsigned long)cmd;
1387 }
1388
1389 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1390                                      unsigned int changed_flags,
1391                                      unsigned int *total_flags,
1392                                      u64 multicast)
1393 {
1394         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1395         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1396
1397         mutex_lock(&mvm->mutex);
1398
1399         /* replace previous configuration */
1400         kfree(mvm->mcast_filter_cmd);
1401         mvm->mcast_filter_cmd = cmd;
1402
1403         if (!cmd)
1404                 goto out;
1405
1406         iwl_mvm_recalc_multicast(mvm);
1407 out:
1408         mutex_unlock(&mvm->mutex);
1409         *total_flags = 0;
1410 }
1411
1412 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1413 struct iwl_bcast_iter_data {
1414         struct iwl_mvm *mvm;
1415         struct iwl_bcast_filter_cmd *cmd;
1416         u8 current_filter;
1417 };
1418
1419 static void
1420 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1421                          const struct iwl_fw_bcast_filter *in_filter,
1422                          struct iwl_fw_bcast_filter *out_filter)
1423 {
1424         struct iwl_fw_bcast_filter_attr *attr;
1425         int i;
1426
1427         memcpy(out_filter, in_filter, sizeof(*out_filter));
1428
1429         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1430                 attr = &out_filter->attrs[i];
1431
1432                 if (!attr->mask)
1433                         break;
1434
1435                 switch (attr->reserved1) {
1436                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1437                         if (vif->bss_conf.arp_addr_cnt != 1) {
1438                                 attr->mask = 0;
1439                                 continue;
1440                         }
1441
1442                         attr->val = vif->bss_conf.arp_addr_list[0];
1443                         break;
1444                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1445                         attr->val = *(__be32 *)&vif->addr[2];
1446                         break;
1447                 default:
1448                         break;
1449                 }
1450                 attr->reserved1 = 0;
1451                 out_filter->num_attrs++;
1452         }
1453 }
1454
1455 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1456                                           struct ieee80211_vif *vif)
1457 {
1458         struct iwl_bcast_iter_data *data = _data;
1459         struct iwl_mvm *mvm = data->mvm;
1460         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1461         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1462         struct iwl_fw_bcast_mac *bcast_mac;
1463         int i;
1464
1465         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1466                 return;
1467
1468         bcast_mac = &cmd->macs[mvmvif->id];
1469
1470         /*
1471          * enable filtering only for associated stations, but not for P2P
1472          * Clients
1473          */
1474         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1475             !vif->bss_conf.assoc)
1476                 return;
1477
1478         bcast_mac->default_discard = 1;
1479
1480         /* copy all configured filters */
1481         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1482                 /*
1483                  * Make sure we don't exceed our filters limit.
1484                  * if there is still a valid filter to be configured,
1485                  * be on the safe side and just allow bcast for this mac.
1486                  */
1487                 if (WARN_ON_ONCE(data->current_filter >=
1488                                  ARRAY_SIZE(cmd->filters))) {
1489                         bcast_mac->default_discard = 0;
1490                         bcast_mac->attached_filters = 0;
1491                         break;
1492                 }
1493
1494                 iwl_mvm_set_bcast_filter(vif,
1495                                          &mvm->bcast_filters[i],
1496                                          &cmd->filters[data->current_filter]);
1497
1498                 /* skip current filter if it contains no attributes */
1499                 if (!cmd->filters[data->current_filter].num_attrs)
1500                         continue;
1501
1502                 /* attach the filter to current mac */
1503                 bcast_mac->attached_filters |=
1504                                 cpu_to_le16(BIT(data->current_filter));
1505
1506                 data->current_filter++;
1507         }
1508 }
1509
1510 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1511                                     struct iwl_bcast_filter_cmd *cmd)
1512 {
1513         struct iwl_bcast_iter_data iter_data = {
1514                 .mvm = mvm,
1515                 .cmd = cmd,
1516         };
1517
1518         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1519                 return false;
1520
1521         memset(cmd, 0, sizeof(*cmd));
1522         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1523         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1524
1525 #ifdef CONFIG_IWLWIFI_DEBUGFS
1526         /* use debugfs filters/macs if override is configured */
1527         if (mvm->dbgfs_bcast_filtering.override) {
1528                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1529                        sizeof(cmd->filters));
1530                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1531                        sizeof(cmd->macs));
1532                 return true;
1533         }
1534 #endif
1535
1536         /* if no filters are configured, do nothing */
1537         if (!mvm->bcast_filters)
1538                 return false;
1539
1540         /* configure and attach these filters for each associated sta vif */
1541         ieee80211_iterate_active_interfaces(
1542                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1543                 iwl_mvm_bcast_filter_iterator, &iter_data);
1544
1545         return true;
1546 }
1547 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1548                                           struct ieee80211_vif *vif)
1549 {
1550         struct iwl_bcast_filter_cmd cmd;
1551
1552         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1553                 return 0;
1554
1555         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1556                 return 0;
1557
1558         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1559                                     sizeof(cmd), &cmd);
1560 }
1561 #else
1562 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1563                                                  struct ieee80211_vif *vif)
1564 {
1565         return 0;
1566 }
1567 #endif
1568
1569 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1570                                              struct ieee80211_vif *vif,
1571                                              struct ieee80211_bss_conf *bss_conf,
1572                                              u32 changes)
1573 {
1574         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1575         int ret;
1576
1577         /*
1578          * Re-calculate the tsf id, as the master-slave relations depend on the
1579          * beacon interval, which was not known when the station interface was
1580          * added.
1581          */
1582         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1583                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1584
1585         /*
1586          * If we're not associated yet, take the (new) BSSID before associating
1587          * so the firmware knows. If we're already associated, then use the old
1588          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1589          * branch for disassociation below.
1590          */
1591         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1592                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1593
1594         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1595         if (ret)
1596                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1597
1598         /* after sending it once, adopt mac80211 data */
1599         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1600         mvmvif->associated = bss_conf->assoc;
1601
1602         if (changes & BSS_CHANGED_ASSOC) {
1603                 if (bss_conf->assoc) {
1604                         /* add quota for this interface */
1605                         ret = iwl_mvm_update_quotas(mvm, NULL);
1606                         if (ret) {
1607                                 IWL_ERR(mvm, "failed to update quotas\n");
1608                                 return;
1609                         }
1610
1611                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1612                                      &mvm->status)) {
1613                                 /*
1614                                  * If we're restarting then the firmware will
1615                                  * obviously have lost synchronisation with
1616                                  * the AP. It will attempt to synchronise by
1617                                  * itself, but we can make it more reliable by
1618                                  * scheduling a session protection time event.
1619                                  *
1620                                  * The firmware needs to receive a beacon to
1621                                  * catch up with synchronisation, use 110% of
1622                                  * the beacon interval.
1623                                  *
1624                                  * Set a large maximum delay to allow for more
1625                                  * than a single interface.
1626                                  */
1627                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1628                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1629                                                         5 * dur, false);
1630                         }
1631
1632                         iwl_mvm_sf_update(mvm, vif, false);
1633                         iwl_mvm_power_vif_assoc(mvm, vif);
1634                         if (vif->p2p) {
1635                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1636                                 iwl_mvm_update_smps(mvm, vif,
1637                                                     IWL_MVM_SMPS_REQ_PROT,
1638                                                     IEEE80211_SMPS_DYNAMIC);
1639                         }
1640                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1641                         /*
1642                          * If update fails - SF might be running in associated
1643                          * mode while disassociated - which is forbidden.
1644                          */
1645                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1646                                   "Failed to update SF upon disassociation\n");
1647
1648                         /* remove AP station now that the MAC is unassoc */
1649                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1650                         if (ret)
1651                                 IWL_ERR(mvm, "failed to remove AP station\n");
1652
1653                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1654                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1655                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1656                         /* remove quota for this interface */
1657                         ret = iwl_mvm_update_quotas(mvm, NULL);
1658                         if (ret)
1659                                 IWL_ERR(mvm, "failed to update quotas\n");
1660
1661                         if (vif->p2p)
1662                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1663
1664                         /* this will take the cleared BSSID from bss_conf */
1665                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1666                         if (ret)
1667                                 IWL_ERR(mvm,
1668                                         "failed to update MAC %pM (clear after unassoc)\n",
1669                                         vif->addr);
1670                 }
1671
1672                 iwl_mvm_recalc_multicast(mvm);
1673                 iwl_mvm_configure_bcast_filter(mvm, vif);
1674
1675                 /* reset rssi values */
1676                 mvmvif->bf_data.ave_beacon_signal = 0;
1677
1678                 iwl_mvm_bt_coex_vif_change(mvm);
1679                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1680                                     IEEE80211_SMPS_AUTOMATIC);
1681         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1682                 /*
1683                  * We received a beacon _after_ association so
1684                  * remove the session protection.
1685                  */
1686                 iwl_mvm_remove_time_event(mvm, mvmvif,
1687                                           &mvmvif->time_event_data);
1688         }
1689
1690         if (changes & BSS_CHANGED_BEACON_INFO) {
1691                 iwl_mvm_sf_update(mvm, vif, false);
1692                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1693         }
1694
1695         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1696                 ret = iwl_mvm_power_update_mac(mvm);
1697                 if (ret)
1698                         IWL_ERR(mvm, "failed to update power mode\n");
1699         }
1700
1701         if (changes & BSS_CHANGED_TXPOWER) {
1702                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1703                                 bss_conf->txpower);
1704                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1705         }
1706
1707         if (changes & BSS_CHANGED_CQM) {
1708                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1709                 /* reset cqm events tracking */
1710                 mvmvif->bf_data.last_cqm_event = 0;
1711                 if (mvmvif->bf_data.bf_enabled) {
1712                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1713                         if (ret)
1714                                 IWL_ERR(mvm,
1715                                         "failed to update CQM thresholds\n");
1716                 }
1717         }
1718
1719         if (changes & BSS_CHANGED_ARP_FILTER) {
1720                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1721                 iwl_mvm_configure_bcast_filter(mvm, vif);
1722         }
1723 }
1724
1725 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1726                                  struct ieee80211_vif *vif)
1727 {
1728         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1729         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1730         int ret;
1731
1732         /*
1733          * iwl_mvm_mac_ctxt_add() might read directly from the device
1734          * (the system time), so make sure it is available.
1735          */
1736         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1737         if (ret)
1738                 return ret;
1739
1740         mutex_lock(&mvm->mutex);
1741
1742         /* Send the beacon template */
1743         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1744         if (ret)
1745                 goto out_unlock;
1746
1747         /*
1748          * Re-calculate the tsf id, as the master-slave relations depend on the
1749          * beacon interval, which was not known when the AP interface was added.
1750          */
1751         if (vif->type == NL80211_IFTYPE_AP)
1752                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1753
1754         /* Add the mac context */
1755         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1756         if (ret)
1757                 goto out_unlock;
1758
1759         /* Perform the binding */
1760         ret = iwl_mvm_binding_add_vif(mvm, vif);
1761         if (ret)
1762                 goto out_remove;
1763
1764         /* Send the bcast station. At this stage the TBTT and DTIM time events
1765          * are added and applied to the scheduler */
1766         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1767         if (ret)
1768                 goto out_unbind;
1769
1770         /* must be set before quota calculations */
1771         mvmvif->ap_ibss_active = true;
1772
1773         /* power updated needs to be done before quotas */
1774         iwl_mvm_power_update_mac(mvm);
1775
1776         ret = iwl_mvm_update_quotas(mvm, NULL);
1777         if (ret)
1778                 goto out_quota_failed;
1779
1780         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1781         if (vif->p2p && mvm->p2p_device_vif)
1782                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1783
1784         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1785
1786         iwl_mvm_bt_coex_vif_change(mvm);
1787
1788         /* we don't support TDLS during DCM */
1789         if (iwl_mvm_phy_ctx_count(mvm) > 1)
1790                 iwl_mvm_teardown_tdls_peers(mvm);
1791
1792         mutex_unlock(&mvm->mutex);
1793         return 0;
1794
1795 out_quota_failed:
1796         iwl_mvm_power_update_mac(mvm);
1797         mvmvif->ap_ibss_active = false;
1798         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1799 out_unbind:
1800         iwl_mvm_binding_remove_vif(mvm, vif);
1801 out_remove:
1802         iwl_mvm_mac_ctxt_remove(mvm, vif);
1803 out_unlock:
1804         mutex_unlock(&mvm->mutex);
1805         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1806         return ret;
1807 }
1808
1809 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1810                                  struct ieee80211_vif *vif)
1811 {
1812         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1813         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1814
1815         iwl_mvm_prepare_mac_removal(mvm, vif);
1816
1817         mutex_lock(&mvm->mutex);
1818
1819         /* Handle AP stop while in CSA */
1820         if (rcu_access_pointer(mvm->csa_vif) == vif) {
1821                 iwl_mvm_remove_time_event(mvm, mvmvif,
1822                                           &mvmvif->time_event_data);
1823                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1824         }
1825
1826         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1827                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1828                 mvm->csa_tx_block_bcn_timeout = 0;
1829         }
1830
1831         mvmvif->ap_ibss_active = false;
1832         mvm->ap_last_beacon_gp2 = 0;
1833
1834         iwl_mvm_bt_coex_vif_change(mvm);
1835
1836         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1837
1838         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1839         if (vif->p2p && mvm->p2p_device_vif)
1840                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1841
1842         iwl_mvm_update_quotas(mvm, NULL);
1843         iwl_mvm_send_rm_bcast_sta(mvm, vif);
1844         iwl_mvm_binding_remove_vif(mvm, vif);
1845
1846         iwl_mvm_power_update_mac(mvm);
1847
1848         iwl_mvm_mac_ctxt_remove(mvm, vif);
1849
1850         mutex_unlock(&mvm->mutex);
1851 }
1852
1853 static void
1854 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1855                                  struct ieee80211_vif *vif,
1856                                  struct ieee80211_bss_conf *bss_conf,
1857                                  u32 changes)
1858 {
1859         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1860
1861         /* Changes will be applied when the AP/IBSS is started */
1862         if (!mvmvif->ap_ibss_active)
1863                 return;
1864
1865         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1866                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1867             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1868                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1869
1870         /* Need to send a new beacon template to the FW */
1871         if (changes & BSS_CHANGED_BEACON &&
1872             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1873                 IWL_WARN(mvm, "Failed updating beacon data\n");
1874
1875         if (changes & BSS_CHANGED_TXPOWER) {
1876                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1877                                 bss_conf->txpower);
1878                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1879         }
1880
1881 }
1882
1883 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1884                                      struct ieee80211_vif *vif,
1885                                      struct ieee80211_bss_conf *bss_conf,
1886                                      u32 changes)
1887 {
1888         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1889
1890         /*
1891          * iwl_mvm_bss_info_changed_station() might call
1892          * iwl_mvm_protect_session(), which reads directly from
1893          * the device (the system time), so make sure it is available.
1894          */
1895         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1896                 return;
1897
1898         mutex_lock(&mvm->mutex);
1899
1900         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1901                 iwl_mvm_scan_offload_stop(mvm, true);
1902
1903         switch (vif->type) {
1904         case NL80211_IFTYPE_STATION:
1905                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1906                 break;
1907         case NL80211_IFTYPE_AP:
1908         case NL80211_IFTYPE_ADHOC:
1909                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1910                 break;
1911         default:
1912                 /* shouldn't happen */
1913                 WARN_ON_ONCE(1);
1914         }
1915
1916         mutex_unlock(&mvm->mutex);
1917         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1918 }
1919
1920 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1921                                           enum iwl_scan_status scan_type)
1922 {
1923         int ret;
1924         bool wait_for_handlers = false;
1925
1926         mutex_lock(&mvm->mutex);
1927
1928         if (mvm->scan_status != scan_type) {
1929                 ret = 0;
1930                 /* make sure there are no pending notifications */
1931                 wait_for_handlers = true;
1932                 goto out;
1933         }
1934
1935         switch (scan_type) {
1936         case IWL_MVM_SCAN_SCHED:
1937                 ret = iwl_mvm_scan_offload_stop(mvm, true);
1938                 break;
1939         case IWL_MVM_SCAN_OS:
1940                 ret = iwl_mvm_cancel_scan(mvm);
1941                 break;
1942         case IWL_MVM_SCAN_NONE:
1943         default:
1944                 WARN_ON_ONCE(1);
1945                 ret = -EINVAL;
1946                 break;
1947         }
1948         if (ret)
1949                 goto out;
1950
1951         wait_for_handlers = true;
1952 out:
1953         mutex_unlock(&mvm->mutex);
1954
1955         /* make sure we consume the completion notification */
1956         if (wait_for_handlers)
1957                 iwl_mvm_wait_for_async_handlers(mvm);
1958
1959         return ret;
1960 }
1961 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1962                                struct ieee80211_vif *vif,
1963                                struct ieee80211_scan_request *hw_req)
1964 {
1965         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1966         struct cfg80211_scan_request *req = &hw_req->req;
1967         int ret;
1968
1969         if (req->n_channels == 0 ||
1970             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1971                 return -EINVAL;
1972
1973         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1974                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1975                 if (ret)
1976                         return ret;
1977         }
1978
1979         mutex_lock(&mvm->mutex);
1980
1981         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1982                 ret = -EBUSY;
1983                 goto out;
1984         }
1985
1986         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1987
1988         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1989                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1990         else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1991                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1992         else
1993                 ret = iwl_mvm_scan_request(mvm, vif, req);
1994
1995         if (ret)
1996                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1997 out:
1998         mutex_unlock(&mvm->mutex);
1999         return ret;
2000 }
2001
2002 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2003                                        struct ieee80211_vif *vif)
2004 {
2005         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2006
2007         mutex_lock(&mvm->mutex);
2008
2009         iwl_mvm_cancel_scan(mvm);
2010
2011         mutex_unlock(&mvm->mutex);
2012 }
2013
2014 static void
2015 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2016                                   struct ieee80211_sta *sta, u16 tids,
2017                                   int num_frames,
2018                                   enum ieee80211_frame_release_type reason,
2019                                   bool more_data)
2020 {
2021         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2022
2023         /* Called when we need to transmit (a) frame(s) from mac80211 */
2024
2025         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2026                                           tids, more_data, false);
2027 }
2028
2029 static void
2030 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2031                                     struct ieee80211_sta *sta, u16 tids,
2032                                     int num_frames,
2033                                     enum ieee80211_frame_release_type reason,
2034                                     bool more_data)
2035 {
2036         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2037
2038         /* Called when we need to transmit (a) frame(s) from agg queue */
2039
2040         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2041                                           tids, more_data, true);
2042 }
2043
2044 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2045                                    struct ieee80211_vif *vif,
2046                                    enum sta_notify_cmd cmd,
2047                                    struct ieee80211_sta *sta)
2048 {
2049         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2050         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2051         int tid;
2052
2053         switch (cmd) {
2054         case STA_NOTIFY_SLEEP:
2055                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2056                         ieee80211_sta_block_awake(hw, sta, true);
2057                 spin_lock_bh(&mvmsta->lock);
2058                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2059                         struct iwl_mvm_tid_data *tid_data;
2060
2061                         tid_data = &mvmsta->tid_data[tid];
2062                         if (tid_data->state != IWL_AGG_ON &&
2063                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2064                                 continue;
2065                         if (iwl_mvm_tid_queued(tid_data) == 0)
2066                                 continue;
2067                         ieee80211_sta_set_buffered(sta, tid, true);
2068                 }
2069                 spin_unlock_bh(&mvmsta->lock);
2070                 /*
2071                  * The fw updates the STA to be asleep. Tx packets on the Tx
2072                  * queues to this station will not be transmitted. The fw will
2073                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2074                  */
2075                 break;
2076         case STA_NOTIFY_AWAKE:
2077                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2078                         break;
2079                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2080                 break;
2081         default:
2082                 break;
2083         }
2084 }
2085
2086 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2087                                        struct ieee80211_vif *vif,
2088                                        struct ieee80211_sta *sta)
2089 {
2090         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2091         struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2092
2093         /*
2094          * This is called before mac80211 does RCU synchronisation,
2095          * so here we already invalidate our internal RCU-protected
2096          * station pointer. The rest of the code will thus no longer
2097          * be able to find the station this way, and we don't rely
2098          * on further RCU synchronisation after the sta_state()
2099          * callback deleted the station.
2100          */
2101         mutex_lock(&mvm->mutex);
2102         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2103                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2104                                    ERR_PTR(-ENOENT));
2105         mutex_unlock(&mvm->mutex);
2106 }
2107
2108 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2109                                  struct ieee80211_vif *vif,
2110                                  struct ieee80211_sta *sta,
2111                                  enum ieee80211_sta_state old_state,
2112                                  enum ieee80211_sta_state new_state)
2113 {
2114         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2115         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2116         int ret;
2117
2118         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2119                            sta->addr, old_state, new_state);
2120
2121         /* this would be a mac80211 bug ... but don't crash */
2122         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2123                 return -EINVAL;
2124
2125         /* if a STA is being removed, reuse its ID */
2126         flush_work(&mvm->sta_drained_wk);
2127
2128         mutex_lock(&mvm->mutex);
2129         if (old_state == IEEE80211_STA_NOTEXIST &&
2130             new_state == IEEE80211_STA_NONE) {
2131                 /*
2132                  * Firmware bug - it'll crash if the beacon interval is less
2133                  * than 16. We can't avoid connecting at all, so refuse the
2134                  * station state change, this will cause mac80211 to abandon
2135                  * attempts to connect to this AP, and eventually wpa_s will
2136                  * blacklist the AP...
2137                  */
2138                 if (vif->type == NL80211_IFTYPE_STATION &&
2139                     vif->bss_conf.beacon_int < 16) {
2140                         IWL_ERR(mvm,
2141                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2142                                 sta->addr, vif->bss_conf.beacon_int);
2143                         ret = -EINVAL;
2144                         goto out_unlock;
2145                 }
2146
2147                 if (sta->tdls &&
2148                     (vif->p2p ||
2149                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2150                                                 IWL_MVM_TDLS_STA_COUNT ||
2151                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2152                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2153                         ret = -EBUSY;
2154                         goto out_unlock;
2155                 }
2156
2157                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2158                 if (sta->tdls && ret == 0)
2159                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2160         } else if (old_state == IEEE80211_STA_NONE &&
2161                    new_state == IEEE80211_STA_AUTH) {
2162                 /*
2163                  * EBS may be disabled due to previous failures reported by FW.
2164                  * Reset EBS status here assuming environment has been changed.
2165                  */
2166                 mvm->last_ebs_successful = true;
2167                 ret = 0;
2168         } else if (old_state == IEEE80211_STA_AUTH &&
2169                    new_state == IEEE80211_STA_ASSOC) {
2170                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2171                 if (ret == 0)
2172                         iwl_mvm_rs_rate_init(mvm, sta,
2173                                              mvmvif->phy_ctxt->channel->band,
2174                                              true);
2175         } else if (old_state == IEEE80211_STA_ASSOC &&
2176                    new_state == IEEE80211_STA_AUTHORIZED) {
2177
2178                 /* we don't support TDLS during DCM */
2179                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2180                         iwl_mvm_teardown_tdls_peers(mvm);
2181
2182                 /* enable beacon filtering */
2183                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2184                 ret = 0;
2185         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2186                    new_state == IEEE80211_STA_ASSOC) {
2187                 /* disable beacon filtering */
2188                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2189                 ret = 0;
2190         } else if (old_state == IEEE80211_STA_ASSOC &&
2191                    new_state == IEEE80211_STA_AUTH) {
2192                 ret = 0;
2193         } else if (old_state == IEEE80211_STA_AUTH &&
2194                    new_state == IEEE80211_STA_NONE) {
2195                 ret = 0;
2196         } else if (old_state == IEEE80211_STA_NONE &&
2197                    new_state == IEEE80211_STA_NOTEXIST) {
2198                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2199                 if (sta->tdls)
2200                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2201         } else {
2202                 ret = -EIO;
2203         }
2204  out_unlock:
2205         mutex_unlock(&mvm->mutex);
2206
2207         if (sta->tdls && ret == 0) {
2208                 if (old_state == IEEE80211_STA_NOTEXIST &&
2209                     new_state == IEEE80211_STA_NONE)
2210                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2211                 else if (old_state == IEEE80211_STA_NONE &&
2212                          new_state == IEEE80211_STA_NOTEXIST)
2213                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2214         }
2215
2216         return ret;
2217 }
2218
2219 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2220 {
2221         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2222
2223         mvm->rts_threshold = value;
2224
2225         return 0;
2226 }
2227
2228 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2229                                   struct ieee80211_vif *vif,
2230                                   struct ieee80211_sta *sta, u32 changed)
2231 {
2232         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2233
2234         if (vif->type == NL80211_IFTYPE_STATION &&
2235             changed & IEEE80211_RC_NSS_CHANGED)
2236                 iwl_mvm_sf_update(mvm, vif, false);
2237 }
2238
2239 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2240                                struct ieee80211_vif *vif, u16 ac,
2241                                const struct ieee80211_tx_queue_params *params)
2242 {
2243         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2244         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2245
2246         mvmvif->queue_params[ac] = *params;
2247
2248         /*
2249          * No need to update right away, we'll get BSS_CHANGED_QOS
2250          * The exception is P2P_DEVICE interface which needs immediate update.
2251          */
2252         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2253                 int ret;
2254
2255                 mutex_lock(&mvm->mutex);
2256                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2257                 mutex_unlock(&mvm->mutex);
2258                 return ret;
2259         }
2260         return 0;
2261 }
2262
2263 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2264                                       struct ieee80211_vif *vif)
2265 {
2266         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2267         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2268                            200 + vif->bss_conf.beacon_int);
2269         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2270                                100 + vif->bss_conf.beacon_int);
2271
2272         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2273                 return;
2274
2275         /*
2276          * iwl_mvm_protect_session() reads directly from the device
2277          * (the system time), so make sure it is available.
2278          */
2279         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2280                 return;
2281
2282         mutex_lock(&mvm->mutex);
2283         /* Try really hard to protect the session and hear a beacon */
2284         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2285         mutex_unlock(&mvm->mutex);
2286
2287         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2288 }
2289
2290 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2291                                         struct ieee80211_vif *vif,
2292                                         struct cfg80211_sched_scan_request *req,
2293                                         struct ieee80211_scan_ies *ies)
2294 {
2295         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2296         int ret;
2297
2298         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2299                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2300                 if (ret)
2301                         return ret;
2302         }
2303
2304         mutex_lock(&mvm->mutex);
2305
2306         /* Newest FW fixes sched scan while connected on another interface */
2307         if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2308                 if (!vif->bss_conf.idle) {
2309                         ret = -EBUSY;
2310                         goto out;
2311                 }
2312         } else if (!iwl_mvm_is_idle(mvm)) {
2313                 ret = -EBUSY;
2314                 goto out;
2315         }
2316
2317         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2318                 ret = -EBUSY;
2319                 goto out;
2320         }
2321
2322         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2323         if (ret)
2324                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2325
2326 out:
2327         mutex_unlock(&mvm->mutex);
2328         return ret;
2329 }
2330
2331 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2332                                        struct ieee80211_vif *vif)
2333 {
2334         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2335         int ret;
2336
2337         mutex_lock(&mvm->mutex);
2338         ret = iwl_mvm_scan_offload_stop(mvm, false);
2339         mutex_unlock(&mvm->mutex);
2340         iwl_mvm_wait_for_async_handlers(mvm);
2341
2342         return ret;
2343
2344 }
2345
2346 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2347                                enum set_key_cmd cmd,
2348                                struct ieee80211_vif *vif,
2349                                struct ieee80211_sta *sta,
2350                                struct ieee80211_key_conf *key)
2351 {
2352         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2353         int ret;
2354
2355         if (iwlwifi_mod_params.sw_crypto) {
2356                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2357                 return -EOPNOTSUPP;
2358         }
2359
2360         switch (key->cipher) {
2361         case WLAN_CIPHER_SUITE_TKIP:
2362                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2363                 /* fall-through */
2364         case WLAN_CIPHER_SUITE_CCMP:
2365                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2366                 break;
2367         case WLAN_CIPHER_SUITE_AES_CMAC:
2368                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2369                 break;
2370         case WLAN_CIPHER_SUITE_WEP40:
2371         case WLAN_CIPHER_SUITE_WEP104:
2372                 /* For non-client mode, only use WEP keys for TX as we probably
2373                  * don't have a station yet anyway and would then have to keep
2374                  * track of the keys, linking them to each of the clients/peers
2375                  * as they appear. For now, don't do that, for performance WEP
2376                  * offload doesn't really matter much, but we need it for some
2377                  * other offload features in client mode.
2378                  */
2379                 if (vif->type != NL80211_IFTYPE_STATION)
2380                         return 0;
2381                 break;
2382         default:
2383                 /* currently FW supports only one optional cipher scheme */
2384                 if (hw->n_cipher_schemes &&
2385                     hw->cipher_schemes->cipher == key->cipher)
2386                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2387                 else
2388                         return -EOPNOTSUPP;
2389         }
2390
2391         mutex_lock(&mvm->mutex);
2392
2393         switch (cmd) {
2394         case SET_KEY:
2395                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2396                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2397                         /*
2398                          * GTK on AP interface is a TX-only key, return 0;
2399                          * on IBSS they're per-station and because we're lazy
2400                          * we don't support them for RX, so do the same.
2401                          */
2402                         ret = 0;
2403                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2404                         break;
2405                 }
2406
2407                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2408                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2409                 if (ret) {
2410                         IWL_WARN(mvm, "set key failed\n");
2411                         /*
2412                          * can't add key for RX, but we don't need it
2413                          * in the device for TX so still return 0
2414                          */
2415                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2416                         ret = 0;
2417                 }
2418
2419                 break;
2420         case DISABLE_KEY:
2421                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2422                         ret = 0;
2423                         break;
2424                 }
2425
2426                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2427                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2428                 break;
2429         default:
2430                 ret = -EINVAL;
2431         }
2432
2433         mutex_unlock(&mvm->mutex);
2434         return ret;
2435 }
2436
2437 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2438                                         struct ieee80211_vif *vif,
2439                                         struct ieee80211_key_conf *keyconf,
2440                                         struct ieee80211_sta *sta,
2441                                         u32 iv32, u16 *phase1key)
2442 {
2443         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2444
2445         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2446                 return;
2447
2448         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2449 }
2450
2451
2452 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2453                                struct iwl_rx_packet *pkt, void *data)
2454 {
2455         struct iwl_mvm *mvm =
2456                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2457         struct iwl_hs20_roc_res *resp;
2458         int resp_len = iwl_rx_packet_payload_len(pkt);
2459         struct iwl_mvm_time_event_data *te_data = data;
2460
2461         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2462                 return true;
2463
2464         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2465                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2466                 return true;
2467         }
2468
2469         resp = (void *)pkt->data;
2470
2471         IWL_DEBUG_TE(mvm,
2472                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2473                      resp->status, resp->event_unique_id);
2474
2475         te_data->uid = le32_to_cpu(resp->event_unique_id);
2476         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2477                      te_data->uid);
2478
2479         spin_lock_bh(&mvm->time_event_lock);
2480         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2481         spin_unlock_bh(&mvm->time_event_lock);
2482
2483         return true;
2484 }
2485
2486 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2487 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2488                                     struct ieee80211_channel *channel,
2489                                     struct ieee80211_vif *vif,
2490                                     int duration)
2491 {
2492         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2493         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2494         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2495         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2496         struct iwl_notification_wait wait_time_event;
2497         struct iwl_hs20_roc_req aux_roc_req = {
2498                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2499                 .id_and_color =
2500                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2501                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2502                 /* Set the channel info data */
2503                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2504                         PHY_BAND_24 : PHY_BAND_5,
2505                 .channel_info.channel = channel->hw_value,
2506                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2507                 /* Set the time and duration */
2508                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2509                 .apply_time_max_delay =
2510                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2511                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2512          };
2513
2514         /* Set the node address */
2515         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2516
2517         lockdep_assert_held(&mvm->mutex);
2518
2519         spin_lock_bh(&mvm->time_event_lock);
2520
2521         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2522                 spin_unlock_bh(&mvm->time_event_lock);
2523                 return -EIO;
2524         }
2525
2526         te_data->vif = vif;
2527         te_data->duration = duration;
2528         te_data->id = HOT_SPOT_CMD;
2529
2530         spin_unlock_bh(&mvm->time_event_lock);
2531
2532         /*
2533          * Use a notification wait, which really just processes the
2534          * command response and doesn't wait for anything, in order
2535          * to be able to process the response and get the UID inside
2536          * the RX path. Using CMD_WANT_SKB doesn't work because it
2537          * stores the buffer and then wakes up this thread, by which
2538          * time another notification (that the time event started)
2539          * might already be processed unsuccessfully.
2540          */
2541         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2542                                    time_event_response,
2543                                    ARRAY_SIZE(time_event_response),
2544                                    iwl_mvm_rx_aux_roc, te_data);
2545
2546         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2547                                    &aux_roc_req);
2548
2549         if (res) {
2550                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2551                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2552                 goto out_clear_te;
2553         }
2554
2555         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2556         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2557         /* should never fail */
2558         WARN_ON_ONCE(res);
2559
2560         if (res) {
2561  out_clear_te:
2562                 spin_lock_bh(&mvm->time_event_lock);
2563                 iwl_mvm_te_clear_data(mvm, te_data);
2564                 spin_unlock_bh(&mvm->time_event_lock);
2565         }
2566
2567         return res;
2568 }
2569
2570 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2571                        struct ieee80211_vif *vif,
2572                        struct ieee80211_channel *channel,
2573                        int duration,
2574                        enum ieee80211_roc_type type)
2575 {
2576         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2577         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2578         struct cfg80211_chan_def chandef;
2579         struct iwl_mvm_phy_ctxt *phy_ctxt;
2580         int ret, i;
2581
2582         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2583                            duration, type);
2584
2585         mutex_lock(&mvm->mutex);
2586
2587         switch (vif->type) {
2588         case NL80211_IFTYPE_STATION:
2589                 if (mvm->fw->ucode_capa.capa[0] &
2590                     IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
2591                         /* Use aux roc framework (HS20) */
2592                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2593                                                        vif, duration);
2594                         goto out_unlock;
2595                 }
2596                 IWL_ERR(mvm, "hotspot not supported\n");
2597                 ret = -EINVAL;
2598                 goto out_unlock;
2599         case NL80211_IFTYPE_P2P_DEVICE:
2600                 /* handle below */
2601                 break;
2602         default:
2603                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2604                 ret = -EINVAL;
2605                 goto out_unlock;
2606         }
2607
2608         for (i = 0; i < NUM_PHY_CTX; i++) {
2609                 phy_ctxt = &mvm->phy_ctxts[i];
2610                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2611                         continue;
2612
2613                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2614                         /*
2615                          * Unbind the P2P_DEVICE from the current PHY context,
2616                          * and if the PHY context is not used remove it.
2617                          */
2618                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2619                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2620                                 goto out_unlock;
2621
2622                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2623
2624                         /* Bind the P2P_DEVICE to the current PHY Context */
2625                         mvmvif->phy_ctxt = phy_ctxt;
2626
2627                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2628                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2629                                 goto out_unlock;
2630
2631                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2632                         goto schedule_time_event;
2633                 }
2634         }
2635
2636         /* Need to update the PHY context only if the ROC channel changed */
2637         if (channel == mvmvif->phy_ctxt->channel)
2638                 goto schedule_time_event;
2639
2640         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2641
2642         /*
2643          * Change the PHY context configuration as it is currently referenced
2644          * only by the P2P Device MAC
2645          */
2646         if (mvmvif->phy_ctxt->ref == 1) {
2647                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2648                                                &chandef, 1, 1);
2649                 if (ret)
2650                         goto out_unlock;
2651         } else {
2652                 /*
2653                  * The PHY context is shared with other MACs. Need to remove the
2654                  * P2P Device from the binding, allocate an new PHY context and
2655                  * create a new binding
2656                  */
2657                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2658                 if (!phy_ctxt) {
2659                         ret = -ENOSPC;
2660                         goto out_unlock;
2661                 }
2662
2663                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2664                                                1, 1);
2665                 if (ret) {
2666                         IWL_ERR(mvm, "Failed to change PHY context\n");
2667                         goto out_unlock;
2668                 }
2669
2670                 /* Unbind the P2P_DEVICE from the current PHY context */
2671                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2672                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2673                         goto out_unlock;
2674
2675                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2676
2677                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2678                 mvmvif->phy_ctxt = phy_ctxt;
2679
2680                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2681                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2682                         goto out_unlock;
2683
2684                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2685         }
2686
2687 schedule_time_event:
2688         /* Schedule the time events */
2689         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2690
2691 out_unlock:
2692         mutex_unlock(&mvm->mutex);
2693         IWL_DEBUG_MAC80211(mvm, "leave\n");
2694         return ret;
2695 }
2696
2697 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2698 {
2699         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2700
2701         IWL_DEBUG_MAC80211(mvm, "enter\n");
2702
2703         mutex_lock(&mvm->mutex);
2704         iwl_mvm_stop_roc(mvm);
2705         mutex_unlock(&mvm->mutex);
2706
2707         IWL_DEBUG_MAC80211(mvm, "leave\n");
2708         return 0;
2709 }
2710
2711 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2712                                  struct ieee80211_chanctx_conf *ctx)
2713 {
2714         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2715         struct iwl_mvm_phy_ctxt *phy_ctxt;
2716         int ret;
2717
2718         lockdep_assert_held(&mvm->mutex);
2719
2720         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2721
2722         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2723         if (!phy_ctxt) {
2724                 ret = -ENOSPC;
2725                 goto out;
2726         }
2727
2728         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2729                                        ctx->rx_chains_static,
2730                                        ctx->rx_chains_dynamic);
2731         if (ret) {
2732                 IWL_ERR(mvm, "Failed to add PHY context\n");
2733                 goto out;
2734         }
2735
2736         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2737         *phy_ctxt_id = phy_ctxt->id;
2738 out:
2739         return ret;
2740 }
2741
2742 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2743                                struct ieee80211_chanctx_conf *ctx)
2744 {
2745         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2746         int ret;
2747
2748         mutex_lock(&mvm->mutex);
2749         ret = __iwl_mvm_add_chanctx(mvm, ctx);
2750         mutex_unlock(&mvm->mutex);
2751
2752         return ret;
2753 }
2754
2755 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2756                                      struct ieee80211_chanctx_conf *ctx)
2757 {
2758         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2759         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2760
2761         lockdep_assert_held(&mvm->mutex);
2762
2763         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2764 }
2765
2766 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2767                                    struct ieee80211_chanctx_conf *ctx)
2768 {
2769         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2770
2771         mutex_lock(&mvm->mutex);
2772         __iwl_mvm_remove_chanctx(mvm, ctx);
2773         mutex_unlock(&mvm->mutex);
2774 }
2775
2776 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2777                                    struct ieee80211_chanctx_conf *ctx,
2778                                    u32 changed)
2779 {
2780         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2781         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2782         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2783
2784         if (WARN_ONCE((phy_ctxt->ref > 1) &&
2785                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2786                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2787                                    IEEE80211_CHANCTX_CHANGE_RADAR |
2788                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2789                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
2790                       phy_ctxt->ref, changed))
2791                 return;
2792
2793         mutex_lock(&mvm->mutex);
2794         iwl_mvm_bt_coex_vif_change(mvm);
2795         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2796                                  ctx->rx_chains_static,
2797                                  ctx->rx_chains_dynamic);
2798         mutex_unlock(&mvm->mutex);
2799 }
2800
2801 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2802                                         struct ieee80211_vif *vif,
2803                                         struct ieee80211_chanctx_conf *ctx,
2804                                         bool switching_chanctx)
2805 {
2806         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2807         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2808         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2809         int ret;
2810
2811         lockdep_assert_held(&mvm->mutex);
2812
2813         mvmvif->phy_ctxt = phy_ctxt;
2814
2815         switch (vif->type) {
2816         case NL80211_IFTYPE_AP:
2817                 /* only needed if we're switching chanctx (i.e. during CSA) */
2818                 if (switching_chanctx) {
2819                         mvmvif->ap_ibss_active = true;
2820                         break;
2821                 }
2822         case NL80211_IFTYPE_ADHOC:
2823                 /*
2824                  * The AP binding flow is handled as part of the start_ap flow
2825                  * (in bss_info_changed), similarly for IBSS.
2826                  */
2827                 ret = 0;
2828                 goto out;
2829         case NL80211_IFTYPE_STATION:
2830                 break;
2831         case NL80211_IFTYPE_MONITOR:
2832                 /* always disable PS when a monitor interface is active */
2833                 mvmvif->ps_disabled = true;
2834                 break;
2835         default:
2836                 ret = -EINVAL;
2837                 goto out;
2838         }
2839
2840         ret = iwl_mvm_binding_add_vif(mvm, vif);
2841         if (ret)
2842                 goto out;
2843
2844         /*
2845          * Power state must be updated before quotas,
2846          * otherwise fw will complain.
2847          */
2848         iwl_mvm_power_update_mac(mvm);
2849
2850         /* Setting the quota at this stage is only required for monitor
2851          * interfaces. For the other types, the bss_info changed flow
2852          * will handle quota settings.
2853          */
2854         if (vif->type == NL80211_IFTYPE_MONITOR) {
2855                 mvmvif->monitor_active = true;
2856                 ret = iwl_mvm_update_quotas(mvm, NULL);
2857                 if (ret)
2858                         goto out_remove_binding;
2859         }
2860
2861         /* Handle binding during CSA */
2862         if (vif->type == NL80211_IFTYPE_AP) {
2863                 iwl_mvm_update_quotas(mvm, NULL);
2864                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2865         }
2866
2867         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
2868                 u32 duration = 2 * vif->bss_conf.beacon_int;
2869
2870                 /* iwl_mvm_protect_session() reads directly from the
2871                  * device (the system time), so make sure it is
2872                  * available.
2873                  */
2874                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
2875                 if (ret)
2876                         goto out_remove_binding;
2877
2878                 /* Protect the session to make sure we hear the first
2879                  * beacon on the new channel.
2880                  */
2881                 iwl_mvm_protect_session(mvm, vif, duration, duration,
2882                                         vif->bss_conf.beacon_int / 2,
2883                                         true);
2884
2885                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
2886
2887                 iwl_mvm_update_quotas(mvm, NULL);
2888         }
2889
2890         goto out;
2891
2892 out_remove_binding:
2893         iwl_mvm_binding_remove_vif(mvm, vif);
2894         iwl_mvm_power_update_mac(mvm);
2895 out:
2896         if (ret)
2897                 mvmvif->phy_ctxt = NULL;
2898         return ret;
2899 }
2900 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2901                                       struct ieee80211_vif *vif,
2902                                       struct ieee80211_chanctx_conf *ctx)
2903 {
2904         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2905         int ret;
2906
2907         mutex_lock(&mvm->mutex);
2908         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2909         mutex_unlock(&mvm->mutex);
2910
2911         return ret;
2912 }
2913
2914 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2915                                            struct ieee80211_vif *vif,
2916                                            struct ieee80211_chanctx_conf *ctx,
2917                                            bool switching_chanctx)
2918 {
2919         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2920         struct ieee80211_vif *disabled_vif = NULL;
2921
2922         lockdep_assert_held(&mvm->mutex);
2923
2924         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2925
2926         switch (vif->type) {
2927         case NL80211_IFTYPE_ADHOC:
2928                 goto out;
2929         case NL80211_IFTYPE_MONITOR:
2930                 mvmvif->monitor_active = false;
2931                 mvmvif->ps_disabled = false;
2932                 break;
2933         case NL80211_IFTYPE_AP:
2934                 /* This part is triggered only during CSA */
2935                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
2936                         goto out;
2937
2938                 mvmvif->csa_countdown = false;
2939
2940                 /* Set CS bit on all the stations */
2941                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2942
2943                 /* Save blocked iface, the timeout is set on the next beacon */
2944                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2945
2946                 mvmvif->ap_ibss_active = false;
2947                 break;
2948         case NL80211_IFTYPE_STATION:
2949                 if (!switching_chanctx)
2950                         break;
2951
2952                 disabled_vif = vif;
2953
2954                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2955                 break;
2956         default:
2957                 break;
2958         }
2959
2960         iwl_mvm_update_quotas(mvm, disabled_vif);
2961         iwl_mvm_binding_remove_vif(mvm, vif);
2962
2963 out:
2964         mvmvif->phy_ctxt = NULL;
2965         iwl_mvm_power_update_mac(mvm);
2966 }
2967
2968 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2969                                          struct ieee80211_vif *vif,
2970                                          struct ieee80211_chanctx_conf *ctx)
2971 {
2972         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2973
2974         mutex_lock(&mvm->mutex);
2975         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2976         mutex_unlock(&mvm->mutex);
2977 }
2978
2979 static int
2980 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
2981                                 struct ieee80211_vif_chanctx_switch *vifs)
2982 {
2983         int ret;
2984
2985         mutex_lock(&mvm->mutex);
2986         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2987         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2988
2989         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2990         if (ret) {
2991                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2992                 goto out_reassign;
2993         }
2994
2995         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2996                                            true);
2997         if (ret) {
2998                 IWL_ERR(mvm,
2999                         "failed to assign new_ctx during channel switch\n");
3000                 goto out_remove;
3001         }
3002
3003         /* we don't support TDLS during DCM - can be caused by channel switch */
3004         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3005                 iwl_mvm_teardown_tdls_peers(mvm);
3006
3007         goto out;
3008
3009 out_remove:
3010         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3011
3012 out_reassign:
3013         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3014                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3015                 goto out_restart;
3016         }
3017
3018         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3019                                          true)) {
3020                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3021                 goto out_restart;
3022         }
3023
3024         goto out;
3025
3026 out_restart:
3027         /* things keep failing, better restart the hw */
3028         iwl_mvm_nic_restart(mvm, false);
3029
3030 out:
3031         mutex_unlock(&mvm->mutex);
3032
3033         return ret;
3034 }
3035
3036 static int
3037 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3038                                     struct ieee80211_vif_chanctx_switch *vifs)
3039 {
3040         int ret;
3041
3042         mutex_lock(&mvm->mutex);
3043         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3044
3045         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3046                                            true);
3047         if (ret) {
3048                 IWL_ERR(mvm,
3049                         "failed to assign new_ctx during channel switch\n");
3050                 goto out_reassign;
3051         }
3052
3053         goto out;
3054
3055 out_reassign:
3056         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3057                                          true)) {
3058                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3059                 goto out_restart;
3060         }
3061
3062         goto out;
3063
3064 out_restart:
3065         /* things keep failing, better restart the hw */
3066         iwl_mvm_nic_restart(mvm, false);
3067
3068 out:
3069         mutex_unlock(&mvm->mutex);
3070
3071         return ret;
3072 }
3073
3074 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3075                                       struct ieee80211_vif_chanctx_switch *vifs,
3076                                       int n_vifs,
3077                                       enum ieee80211_chanctx_switch_mode mode)
3078 {
3079         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3080         int ret;
3081
3082         /* we only support a single-vif right now */
3083         if (n_vifs > 1)
3084                 return -EOPNOTSUPP;
3085
3086         switch (mode) {
3087         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3088                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3089                 break;
3090         case CHANCTX_SWMODE_REASSIGN_VIF:
3091                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3092                 break;
3093         default:
3094                 ret = -EOPNOTSUPP;
3095                 break;
3096         }
3097
3098         return ret;
3099 }
3100