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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
16  * WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23  * USA
24  *
25  * The full GNU General Public License is included in this distribution
26  * in the file called COPYING.
27  *
28  * Contact Information:
29  *  Intel Linux Wireless <ilw@linux.intel.com>
30  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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  *
38  * Redistribution and use in source and binary forms, with or without
39  * modification, are permitted provided that the following conditions
40  * are met:
41  *
42  *  * Redistributions of source code must retain the above copyright
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 #include "iwl-csr.h"
89
90 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
91         {
92                 .max = 1,
93                 .types = BIT(NL80211_IFTYPE_STATION),
94         },
95         {
96                 .max = 1,
97                 .types = BIT(NL80211_IFTYPE_AP) |
98                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
99                         BIT(NL80211_IFTYPE_P2P_GO),
100         },
101         {
102                 .max = 1,
103                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
104         },
105 };
106
107 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
108         {
109                 .num_different_channels = 2,
110                 .max_interfaces = 3,
111                 .limits = iwl_mvm_limits,
112                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
113         },
114 };
115
116 #ifdef CONFIG_PM_SLEEP
117 static const struct nl80211_wowlan_tcp_data_token_feature
118 iwl_mvm_wowlan_tcp_token_feature = {
119         .min_len = 0,
120         .max_len = 255,
121         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
122 };
123
124 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
125         .tok = &iwl_mvm_wowlan_tcp_token_feature,
126         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
127                             sizeof(struct ethhdr) -
128                             sizeof(struct iphdr) -
129                             sizeof(struct tcphdr),
130         .data_interval_max = 65535, /* __le16 in API */
131         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
132                             sizeof(struct ethhdr) -
133                             sizeof(struct iphdr) -
134                             sizeof(struct tcphdr),
135         .seq = true,
136 };
137 #endif
138
139 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
140 /*
141  * Use the reserved field to indicate magic values.
142  * these values will only be used internally by the driver,
143  * and won't make it to the fw (reserved will be 0).
144  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
145  *      be the vif's ip address. in case there is not a single
146  *      ip address (0, or more than 1), this attribute will
147  *      be skipped.
148  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
149  *      the LSB bytes of the vif's mac address
150  */
151 enum {
152         BC_FILTER_MAGIC_NONE = 0,
153         BC_FILTER_MAGIC_IP,
154         BC_FILTER_MAGIC_MAC,
155 };
156
157 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
158         {
159                 /* arp */
160                 .discard = 0,
161                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
162                 .attrs = {
163                         {
164                                 /* frame type - arp, hw type - ethernet */
165                                 .offset_type =
166                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
167                                 .offset = sizeof(rfc1042_header),
168                                 .val = cpu_to_be32(0x08060001),
169                                 .mask = cpu_to_be32(0xffffffff),
170                         },
171                         {
172                                 /* arp dest ip */
173                                 .offset_type =
174                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
175                                 .offset = sizeof(rfc1042_header) + 2 +
176                                           sizeof(struct arphdr) +
177                                           ETH_ALEN + sizeof(__be32) +
178                                           ETH_ALEN,
179                                 .mask = cpu_to_be32(0xffffffff),
180                                 /* mark it as special field */
181                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
182                         },
183                 },
184         },
185         {
186                 /* dhcp offer bcast */
187                 .discard = 0,
188                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
189                 .attrs = {
190                         {
191                                 /* udp dest port - 68 (bootp client)*/
192                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
193                                 .offset = offsetof(struct udphdr, dest),
194                                 .val = cpu_to_be32(0x00440000),
195                                 .mask = cpu_to_be32(0xffff0000),
196                         },
197                         {
198                                 /* dhcp - lsb bytes of client hw address */
199                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
200                                 .offset = 38,
201                                 .mask = cpu_to_be32(0xffffffff),
202                                 /* mark it as special field */
203                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
204                         },
205                 },
206         },
207         /* last filter must be empty */
208         {},
209 };
210 #endif
211
212 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
213 {
214         if (!iwl_mvm_is_d0i3_supported(mvm))
215                 return;
216
217         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
218         spin_lock_bh(&mvm->refs_lock);
219         mvm->refs[ref_type]++;
220         spin_unlock_bh(&mvm->refs_lock);
221         iwl_trans_ref(mvm->trans);
222 }
223
224 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
225 {
226         if (!iwl_mvm_is_d0i3_supported(mvm))
227                 return;
228
229         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
230         spin_lock_bh(&mvm->refs_lock);
231         WARN_ON(!mvm->refs[ref_type]--);
232         spin_unlock_bh(&mvm->refs_lock);
233         iwl_trans_unref(mvm->trans);
234 }
235
236 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
237                                      enum iwl_mvm_ref_type except_ref)
238 {
239         int i, j;
240
241         if (!iwl_mvm_is_d0i3_supported(mvm))
242                 return;
243
244         spin_lock_bh(&mvm->refs_lock);
245         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
246                 if (except_ref == i || !mvm->refs[i])
247                         continue;
248
249                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
250                               i, mvm->refs[i]);
251                 for (j = 0; j < mvm->refs[i]; j++)
252                         iwl_trans_unref(mvm->trans);
253                 mvm->refs[i] = 0;
254         }
255         spin_unlock_bh(&mvm->refs_lock);
256 }
257
258 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
259 {
260         int i;
261         bool taken = false;
262
263         if (!iwl_mvm_is_d0i3_supported(mvm))
264                 return true;
265
266         spin_lock_bh(&mvm->refs_lock);
267         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
268                 if (mvm->refs[i]) {
269                         taken = true;
270                         break;
271                 }
272         }
273         spin_unlock_bh(&mvm->refs_lock);
274
275         return taken;
276 }
277
278 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
279 {
280         iwl_mvm_ref(mvm, ref_type);
281
282         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
283                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
284                                 HZ)) {
285                 WARN_ON_ONCE(1);
286                 iwl_mvm_unref(mvm, ref_type);
287                 return -EIO;
288         }
289
290         return 0;
291 }
292
293 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
294 {
295         int i;
296
297         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
298         for (i = 0; i < NUM_PHY_CTX; i++) {
299                 mvm->phy_ctxts[i].id = i;
300                 mvm->phy_ctxts[i].ref = 0;
301         }
302 }
303
304 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
305 {
306         struct ieee80211_hw *hw = mvm->hw;
307         int num_mac, ret, i;
308
309         /* Tell mac80211 our characteristics */
310         hw->flags = IEEE80211_HW_SIGNAL_DBM |
311                     IEEE80211_HW_SPECTRUM_MGMT |
312                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
313                     IEEE80211_HW_QUEUE_CONTROL |
314                     IEEE80211_HW_WANT_MONITOR_VIF |
315                     IEEE80211_HW_SUPPORTS_PS |
316                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
317                     IEEE80211_HW_AMPDU_AGGREGATION |
318                     IEEE80211_HW_TIMING_BEACON_ONLY |
319                     IEEE80211_HW_CONNECTION_MONITOR |
320                     IEEE80211_HW_CHANCTX_STA_CSA |
321                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
322
323         hw->queues = mvm->first_agg_queue;
324         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
325         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
326                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
327         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
328                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
329         hw->rate_control_algorithm = "iwl-mvm-rs";
330         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
331         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
332
333         /*
334          * Enable 11w if advertised by firmware and software crypto
335          * is not enabled (as the firmware will interpret some mgmt
336          * packets, so enabling it with software crypto isn't safe)
337          */
338         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
339             !iwlwifi_mod_params.sw_crypto)
340                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
341
342         hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
343         hw->wiphy->features |=
344                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
345                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
346
347         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
348         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
349         hw->chanctx_data_size = sizeof(u16);
350
351         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
352                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
353                 BIT(NL80211_IFTYPE_AP) |
354                 BIT(NL80211_IFTYPE_P2P_GO) |
355                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
356                 BIT(NL80211_IFTYPE_ADHOC);
357
358         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
359         hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
360                                        REGULATORY_DISABLE_BEACON_HINTS;
361
362         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
363                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
364
365         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
366
367         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
368         hw->wiphy->n_iface_combinations =
369                 ARRAY_SIZE(iwl_mvm_iface_combinations);
370
371         hw->wiphy->max_remain_on_channel_duration = 10000;
372         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
373         /* we can compensate an offset of up to 3 channels = 15 MHz */
374         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
375
376         /* Extract MAC address */
377         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
378         hw->wiphy->addresses = mvm->addresses;
379         hw->wiphy->n_addresses = 1;
380
381         /* Extract additional MAC addresses if available */
382         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
383                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
384
385         for (i = 1; i < num_mac; i++) {
386                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
387                        ETH_ALEN);
388                 mvm->addresses[i].addr[5]++;
389                 hw->wiphy->n_addresses++;
390         }
391
392         iwl_mvm_reset_phy_ctxts(mvm);
393
394         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
395
396         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
397
398         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
399                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
400                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
401         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
402                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
403                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
404
405                 if ((mvm->fw->ucode_capa.capa[0] &
406                      IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
407                     (mvm->fw->ucode_capa.api[0] &
408                      IWL_UCODE_TLV_API_LQ_SS_PARAMS))
409                         hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
410                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
411         }
412
413         hw->wiphy->hw_version = mvm->trans->hw_id;
414
415         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
416                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
417         else
418                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
419
420         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
421                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
422                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
423                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
424                 /* we create the 802.11 header and zero length SSID IE. */
425                 hw->wiphy->max_sched_scan_ie_len =
426                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
427         }
428
429         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
430                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
431                                NL80211_FEATURE_P2P_GO_OPPPS |
432                                NL80211_FEATURE_DYNAMIC_SMPS |
433                                NL80211_FEATURE_STATIC_SMPS |
434                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
435
436         if (mvm->fw->ucode_capa.capa[0] &
437             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
438                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
439         if (mvm->fw->ucode_capa.capa[0] &
440             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
441                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
442
443         if (mvm->fw->ucode_capa.capa[0] &
444             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
445                 hw->wiphy->features |=
446                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
447
448         if (mvm->fw->ucode_capa.capa[0] &
449             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
450                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
451
452         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
453
454         /* currently FW API supports only one optional cipher scheme */
455         if (mvm->fw->cs[0].cipher) {
456                 mvm->hw->n_cipher_schemes = 1;
457                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
458         }
459
460 #ifdef CONFIG_PM_SLEEP
461         if (iwl_mvm_is_d0i3_supported(mvm) &&
462             device_can_wakeup(mvm->trans->dev)) {
463                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
464                 hw->wiphy->wowlan = &mvm->wowlan;
465         }
466
467         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
468             mvm->trans->ops->d3_suspend &&
469             mvm->trans->ops->d3_resume &&
470             device_can_wakeup(mvm->trans->dev)) {
471                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
472                                      WIPHY_WOWLAN_DISCONNECT |
473                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
474                                      WIPHY_WOWLAN_RFKILL_RELEASE |
475                                      WIPHY_WOWLAN_NET_DETECT;
476                 if (!iwlwifi_mod_params.sw_crypto)
477                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
478                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
479                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
480
481                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
482                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
483                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
484                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
485                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
486                 hw->wiphy->wowlan = &mvm->wowlan;
487         }
488 #endif
489
490 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
491         /* assign default bcast filtering configuration */
492         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
493 #endif
494
495         ret = iwl_mvm_leds_init(mvm);
496         if (ret)
497                 return ret;
498
499         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
500                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
501                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
502         }
503
504         if (mvm->fw->ucode_capa.capa[0] &
505             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
506                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
507                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
508         }
509
510         ret = ieee80211_register_hw(mvm->hw);
511         if (ret)
512                 iwl_mvm_leds_exit(mvm);
513
514         return ret;
515 }
516
517 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
518                              struct ieee80211_sta *sta,
519                              struct sk_buff *skb)
520 {
521         struct iwl_mvm_sta *mvmsta;
522         bool defer = false;
523
524         /*
525          * double check the IN_D0I3 flag both before and after
526          * taking the spinlock, in order to prevent taking
527          * the spinlock when not needed.
528          */
529         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
530                 return false;
531
532         spin_lock(&mvm->d0i3_tx_lock);
533         /*
534          * testing the flag again ensures the skb dequeue
535          * loop (on d0i3 exit) hasn't run yet.
536          */
537         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
538                 goto out;
539
540         mvmsta = iwl_mvm_sta_from_mac80211(sta);
541         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
542             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
543                 goto out;
544
545         __skb_queue_tail(&mvm->d0i3_tx, skb);
546         ieee80211_stop_queues(mvm->hw);
547
548         /* trigger wakeup */
549         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
550         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
551
552         defer = true;
553 out:
554         spin_unlock(&mvm->d0i3_tx_lock);
555         return defer;
556 }
557
558 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
559                            struct ieee80211_tx_control *control,
560                            struct sk_buff *skb)
561 {
562         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
563         struct ieee80211_sta *sta = control->sta;
564         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
565         struct ieee80211_hdr *hdr = (void *)skb->data;
566
567         if (iwl_mvm_is_radio_killed(mvm)) {
568                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
569                 goto drop;
570         }
571
572         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
573             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
574             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
575                 goto drop;
576
577         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
578         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
579                      ieee80211_is_mgmt(hdr->frame_control) &&
580                      !ieee80211_is_deauth(hdr->frame_control) &&
581                      !ieee80211_is_disassoc(hdr->frame_control) &&
582                      !ieee80211_is_action(hdr->frame_control)))
583                 sta = NULL;
584
585         if (sta) {
586                 if (iwl_mvm_defer_tx(mvm, sta, skb))
587                         return;
588                 if (iwl_mvm_tx_skb(mvm, skb, sta))
589                         goto drop;
590                 return;
591         }
592
593         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
594                 goto drop;
595         return;
596  drop:
597         ieee80211_free_txskb(hw, skb);
598 }
599
600 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
601 {
602         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
603                 return false;
604         return true;
605 }
606
607 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
608 {
609         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
610                 return false;
611         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
612                 return true;
613
614         /* enabled by default */
615         return true;
616 }
617
618 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
619                                     struct ieee80211_vif *vif,
620                                     enum ieee80211_ampdu_mlme_action action,
621                                     struct ieee80211_sta *sta, u16 tid,
622                                     u16 *ssn, u8 buf_size)
623 {
624         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
625         int ret;
626         bool tx_agg_ref = false;
627
628         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
629                      sta->addr, tid, action);
630
631         if (!(mvm->nvm_data->sku_cap_11n_enable))
632                 return -EACCES;
633
634         /* return from D0i3 before starting a new Tx aggregation */
635         switch (action) {
636         case IEEE80211_AMPDU_TX_START:
637         case IEEE80211_AMPDU_TX_STOP_CONT:
638         case IEEE80211_AMPDU_TX_STOP_FLUSH:
639         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
640         case IEEE80211_AMPDU_TX_OPERATIONAL:
641                 /*
642                  * for tx start, wait synchronously until D0i3 exit to
643                  * get the correct sequence number for the tid.
644                  * additionally, some other ampdu actions use direct
645                  * target access, which is not handled automatically
646                  * by the trans layer (unlike commands), so wait for
647                  * d0i3 exit in these cases as well.
648                  */
649                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
650                 if (ret)
651                         return ret;
652
653                 tx_agg_ref = true;
654                 break;
655         default:
656                 break;
657         }
658
659         mutex_lock(&mvm->mutex);
660
661         switch (action) {
662         case IEEE80211_AMPDU_RX_START:
663                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
664                         ret = -EINVAL;
665                         break;
666                 }
667                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
668                 break;
669         case IEEE80211_AMPDU_RX_STOP:
670                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
671                 break;
672         case IEEE80211_AMPDU_TX_START:
673                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
674                         ret = -EINVAL;
675                         break;
676                 }
677                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
678                 break;
679         case IEEE80211_AMPDU_TX_STOP_CONT:
680                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
681                 break;
682         case IEEE80211_AMPDU_TX_STOP_FLUSH:
683         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
684                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
685                 break;
686         case IEEE80211_AMPDU_TX_OPERATIONAL:
687                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
688                 break;
689         default:
690                 WARN_ON_ONCE(1);
691                 ret = -EINVAL;
692                 break;
693         }
694         mutex_unlock(&mvm->mutex);
695
696         /*
697          * If the tid is marked as started, we won't use it for offloaded
698          * traffic on the next D0i3 entry. It's safe to unref.
699          */
700         if (tx_agg_ref)
701                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
702
703         return ret;
704 }
705
706 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
707                                      struct ieee80211_vif *vif)
708 {
709         struct iwl_mvm *mvm = data;
710         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
711
712         mvmvif->uploaded = false;
713         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
714
715         spin_lock_bh(&mvm->time_event_lock);
716         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
717         spin_unlock_bh(&mvm->time_event_lock);
718
719         mvmvif->phy_ctxt = NULL;
720         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
721 }
722
723 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
724                                      const void *data, size_t datalen)
725 {
726         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
727         ssize_t bytes_read;
728         ssize_t bytes_read_trans;
729
730         if (offset < dump_ptrs->op_mode_len) {
731                 bytes_read = min_t(ssize_t, count,
732                                    dump_ptrs->op_mode_len - offset);
733                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
734                        bytes_read);
735                 offset += bytes_read;
736                 count -= bytes_read;
737
738                 if (count == 0)
739                         return bytes_read;
740         } else {
741                 bytes_read = 0;
742         }
743
744         if (!dump_ptrs->trans_ptr)
745                 return bytes_read;
746
747         offset -= dump_ptrs->op_mode_len;
748         bytes_read_trans = min_t(ssize_t, count,
749                                  dump_ptrs->trans_ptr->len - offset);
750         memcpy(buffer + bytes_read,
751                (u8 *)dump_ptrs->trans_ptr->data + offset,
752                bytes_read_trans);
753
754         return bytes_read + bytes_read_trans;
755 }
756
757 static void iwl_mvm_free_coredump(const void *data)
758 {
759         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
760
761         vfree(fw_error_dump->op_mode_ptr);
762         vfree(fw_error_dump->trans_ptr);
763         kfree(fw_error_dump);
764 }
765
766 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
767                                struct iwl_fw_error_dump_data **dump_data)
768 {
769         struct iwl_fw_error_dump_fifo *fifo_hdr;
770         u32 *fifo_data;
771         u32 fifo_len;
772         unsigned long flags;
773         int i, j;
774
775         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
776                 return;
777
778         /* Pull RXF data from all RXFs */
779         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
780                 /*
781                  * Keep aside the additional offset that might be needed for
782                  * next RXF
783                  */
784                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
785
786                 fifo_hdr = (void *)(*dump_data)->data;
787                 fifo_data = (void *)fifo_hdr->data;
788                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
789
790                 /* No need to try to read the data if the length is 0 */
791                 if (fifo_len == 0)
792                         continue;
793
794                 /* Add a TLV for the RXF */
795                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
796                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
797
798                 fifo_hdr->fifo_num = cpu_to_le32(i);
799                 fifo_hdr->available_bytes =
800                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
801                                                         RXF_RD_D_SPACE +
802                                                         offset_diff));
803                 fifo_hdr->wr_ptr =
804                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
805                                                         RXF_RD_WR_PTR +
806                                                         offset_diff));
807                 fifo_hdr->rd_ptr =
808                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
809                                                         RXF_RD_RD_PTR +
810                                                         offset_diff));
811                 fifo_hdr->fence_ptr =
812                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
813                                                         RXF_RD_FENCE_PTR +
814                                                         offset_diff));
815                 fifo_hdr->fence_mode =
816                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
817                                                         RXF_SET_FENCE_MODE +
818                                                         offset_diff));
819
820                 /* Lock fence */
821                 iwl_trans_write_prph(mvm->trans,
822                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
823                 /* Set fence pointer to the same place like WR pointer */
824                 iwl_trans_write_prph(mvm->trans,
825                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
826                 /* Set fence offset */
827                 iwl_trans_write_prph(mvm->trans,
828                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
829                                      0x0);
830
831                 /* Read FIFO */
832                 fifo_len /= sizeof(u32); /* Size in DWORDS */
833                 for (j = 0; j < fifo_len; j++)
834                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
835                                                          RXF_FIFO_RD_FENCE_INC +
836                                                          offset_diff);
837                 *dump_data = iwl_fw_error_next_data(*dump_data);
838         }
839
840         /* Pull TXF data from all TXFs */
841         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
842                 /* Mark the number of TXF we're pulling now */
843                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
844
845                 fifo_hdr = (void *)(*dump_data)->data;
846                 fifo_data = (void *)fifo_hdr->data;
847                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
848
849                 /* No need to try to read the data if the length is 0 */
850                 if (fifo_len == 0)
851                         continue;
852
853                 /* Add a TLV for the FIFO */
854                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
855                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
856
857                 fifo_hdr->fifo_num = cpu_to_le32(i);
858                 fifo_hdr->available_bytes =
859                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
860                                                         TXF_FIFO_ITEM_CNT));
861                 fifo_hdr->wr_ptr =
862                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
863                                                         TXF_WR_PTR));
864                 fifo_hdr->rd_ptr =
865                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
866                                                         TXF_RD_PTR));
867                 fifo_hdr->fence_ptr =
868                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
869                                                         TXF_FENCE_PTR));
870                 fifo_hdr->fence_mode =
871                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
872                                                         TXF_LOCK_FENCE));
873
874                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
875                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
876                                      TXF_WR_PTR);
877
878                 /* Dummy-read to advance the read pointer to the head */
879                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
880
881                 /* Read FIFO */
882                 fifo_len /= sizeof(u32); /* Size in DWORDS */
883                 for (j = 0; j < fifo_len; j++)
884                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
885                                                           TXF_READ_MODIFY_DATA);
886                 *dump_data = iwl_fw_error_next_data(*dump_data);
887         }
888
889         iwl_trans_release_nic_access(mvm->trans, &flags);
890 }
891
892 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
893 {
894         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
895             !mvm->fw_dump_desc)
896                 return;
897
898         kfree(mvm->fw_dump_desc);
899         mvm->fw_dump_desc = NULL;
900 }
901
902 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
903 {
904         struct iwl_fw_error_dump_file *dump_file;
905         struct iwl_fw_error_dump_data *dump_data;
906         struct iwl_fw_error_dump_info *dump_info;
907         struct iwl_fw_error_dump_mem *dump_mem;
908         struct iwl_fw_error_dump_trigger_desc *dump_trig;
909         struct iwl_mvm_dump_ptrs *fw_error_dump;
910         u32 sram_len, sram_ofs;
911         u32 file_len, fifo_data_len = 0;
912         u32 smem_len = mvm->cfg->smem_len;
913         u32 sram2_len = mvm->cfg->dccm2_len;
914
915         lockdep_assert_held(&mvm->mutex);
916
917         /* W/A for 8000 HW family A-step */
918         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
919             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_A_STEP) {
920                 if (smem_len)
921                         smem_len = 0x38000;
922
923                 if (sram2_len)
924                         sram2_len = 0x10000;
925         }
926
927         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
928         if (!fw_error_dump)
929                 return;
930
931         /* SRAM - include stack CCM if driver knows the values for it */
932         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
933                 const struct fw_img *img;
934
935                 img = &mvm->fw->img[mvm->cur_ucode];
936                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
937                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
938         } else {
939                 sram_ofs = mvm->cfg->dccm_offset;
940                 sram_len = mvm->cfg->dccm_len;
941         }
942
943         /* reading RXF/TXF sizes */
944         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
945                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
946                 int i;
947
948                 fifo_data_len = 0;
949
950                 /* Count RXF size */
951                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
952                         if (!mem_cfg->rxfifo_size[i])
953                                 continue;
954
955                         /* Add header info */
956                         fifo_data_len += mem_cfg->rxfifo_size[i] +
957                                          sizeof(*dump_data) +
958                                          sizeof(struct iwl_fw_error_dump_fifo);
959                 }
960
961                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
962                         if (!mem_cfg->txfifo_size[i])
963                                 continue;
964
965                         /* Add header info */
966                         fifo_data_len += mem_cfg->txfifo_size[i] +
967                                          sizeof(*dump_data) +
968                                          sizeof(struct iwl_fw_error_dump_fifo);
969                 }
970         }
971
972         file_len = sizeof(*dump_file) +
973                    sizeof(*dump_data) * 2 +
974                    sram_len + sizeof(*dump_mem) +
975                    fifo_data_len +
976                    sizeof(*dump_info);
977
978         if (mvm->fw_dump_desc)
979                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
980                             mvm->fw_dump_desc->len;
981
982         /* Make room for the SMEM, if it exists */
983         if (smem_len)
984                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
985
986         /* Make room for the secondary SRAM, if it exists */
987         if (sram2_len)
988                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
989
990         dump_file = vzalloc(file_len);
991         if (!dump_file) {
992                 kfree(fw_error_dump);
993                 iwl_mvm_free_fw_dump_desc(mvm);
994                 return;
995         }
996
997         fw_error_dump->op_mode_ptr = dump_file;
998
999         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1000         dump_data = (void *)dump_file->data;
1001
1002         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1003         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1004         dump_info = (void *) dump_data->data;
1005         dump_info->device_family =
1006                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1007                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1008                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1009         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1010         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1011                sizeof(dump_info->fw_human_readable));
1012         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1013                 sizeof(dump_info->dev_human_readable));
1014         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1015                 sizeof(dump_info->bus_human_readable));
1016
1017         dump_data = iwl_fw_error_next_data(dump_data);
1018         /* We only dump the FIFOs if the FW is in error state */
1019         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1020                 iwl_mvm_dump_fifos(mvm, &dump_data);
1021
1022         if (mvm->fw_dump_desc) {
1023                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1024                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1025                                              mvm->fw_dump_desc->len);
1026                 dump_trig = (void *)dump_data->data;
1027                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1028                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1029
1030                 /* now we can free this copy */
1031                 iwl_mvm_free_fw_dump_desc(mvm);
1032                 dump_data = iwl_fw_error_next_data(dump_data);
1033         }
1034
1035         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1036         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1037         dump_mem = (void *)dump_data->data;
1038         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1039         dump_mem->offset = cpu_to_le32(sram_ofs);
1040         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1041                                  sram_len);
1042
1043         if (smem_len) {
1044                 dump_data = iwl_fw_error_next_data(dump_data);
1045                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1046                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1047                 dump_mem = (void *)dump_data->data;
1048                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1049                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1050                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1051                                          dump_mem->data, smem_len);
1052         }
1053
1054         if (sram2_len) {
1055                 dump_data = iwl_fw_error_next_data(dump_data);
1056                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1057                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1058                 dump_mem = (void *)dump_data->data;
1059                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1060                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1061                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1062                                          dump_mem->data, sram2_len);
1063         }
1064
1065         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
1066         fw_error_dump->op_mode_len = file_len;
1067         if (fw_error_dump->trans_ptr)
1068                 file_len += fw_error_dump->trans_ptr->len;
1069         dump_file->file_len = cpu_to_le32(file_len);
1070
1071         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1072                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1073
1074         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1075 }
1076
1077 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1078         .trig_desc = {
1079                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1080         },
1081 };
1082
1083 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1084 {
1085         /* clear the D3 reconfig, we only need it to avoid dumping a
1086          * firmware coredump on reconfiguration, we shouldn't do that
1087          * on D3->D0 transition
1088          */
1089         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1090                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1091                 iwl_mvm_fw_error_dump(mvm);
1092         }
1093
1094         /* cleanup all stale references (scan, roc), but keep the
1095          * ucode_down ref until reconfig is complete
1096          */
1097         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1098
1099         iwl_trans_stop_device(mvm->trans);
1100
1101         mvm->scan_status = IWL_MVM_SCAN_NONE;
1102         mvm->ps_disabled = false;
1103         mvm->calibrating = false;
1104
1105         /* just in case one was running */
1106         ieee80211_remain_on_channel_expired(mvm->hw);
1107
1108         ieee80211_iterate_active_interfaces_atomic(
1109                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1110                 iwl_mvm_cleanup_iterator, mvm);
1111
1112         mvm->p2p_device_vif = NULL;
1113         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1114
1115         iwl_mvm_reset_phy_ctxts(mvm);
1116         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1117         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1118         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1119         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1120         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1121         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1122         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1123         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1124         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1125
1126         ieee80211_wake_queues(mvm->hw);
1127
1128         /* clear any stale d0i3 state */
1129         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1130
1131         mvm->vif_count = 0;
1132         mvm->rx_ba_sessions = 0;
1133         mvm->fw_dbg_conf = FW_DBG_INVALID;
1134
1135         /* keep statistics ticking */
1136         iwl_mvm_accu_radio_stats(mvm);
1137 }
1138
1139 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1140 {
1141         int ret;
1142
1143         lockdep_assert_held(&mvm->mutex);
1144
1145         /* Clean up some internal and mac80211 state on restart */
1146         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1147                 iwl_mvm_restart_cleanup(mvm);
1148
1149         ret = iwl_mvm_up(mvm);
1150
1151         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1152                 /* Something went wrong - we need to finish some cleanup
1153                  * that normally iwl_mvm_mac_restart_complete() below
1154                  * would do.
1155                  */
1156                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1157                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1158         }
1159
1160         return ret;
1161 }
1162
1163 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1164 {
1165         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1166         int ret;
1167
1168         /* Some hw restart cleanups must not hold the mutex */
1169         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1170                 /*
1171                  * Make sure we are out of d0i3. This is needed
1172                  * to make sure the reference accounting is correct
1173                  * (and there is no stale d0i3_exit_work).
1174                  */
1175                 wait_event_timeout(mvm->d0i3_exit_waitq,
1176                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1177                                              &mvm->status),
1178                                    HZ);
1179         }
1180
1181         mutex_lock(&mvm->mutex);
1182         ret = __iwl_mvm_mac_start(mvm);
1183         mutex_unlock(&mvm->mutex);
1184
1185         return ret;
1186 }
1187
1188 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1189 {
1190         int ret;
1191
1192         mutex_lock(&mvm->mutex);
1193
1194         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1195         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1196         ret = iwl_mvm_update_quotas(mvm, NULL);
1197         if (ret)
1198                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1199                         ret);
1200
1201         /* allow transport/FW low power modes */
1202         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1203
1204         /*
1205          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1206          * of packets the FW sent out, so we must reconnect.
1207          */
1208         iwl_mvm_teardown_tdls_peers(mvm);
1209
1210         mutex_unlock(&mvm->mutex);
1211 }
1212
1213 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1214 {
1215         bool exit_now;
1216
1217         if (!iwl_mvm_is_d0i3_supported(mvm))
1218                 return;
1219
1220         mutex_lock(&mvm->d0i3_suspend_mutex);
1221         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1222         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1223                                         &mvm->d0i3_suspend_flags);
1224         mutex_unlock(&mvm->d0i3_suspend_mutex);
1225
1226         if (exit_now) {
1227                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1228                 _iwl_mvm_exit_d0i3(mvm);
1229         }
1230
1231         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1232                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1233                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1234                                                   &mvm->status),
1235                                         HZ))
1236                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1237 }
1238
1239 static void
1240 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1241                               enum ieee80211_reconfig_type reconfig_type)
1242 {
1243         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1244
1245         switch (reconfig_type) {
1246         case IEEE80211_RECONFIG_TYPE_RESTART:
1247                 iwl_mvm_restart_complete(mvm);
1248                 break;
1249         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1250                 iwl_mvm_resume_complete(mvm);
1251                 break;
1252         }
1253 }
1254
1255 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1256 {
1257         lockdep_assert_held(&mvm->mutex);
1258
1259         /* firmware counters are obviously reset now, but we shouldn't
1260          * partially track so also clear the fw_reset_accu counters.
1261          */
1262         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1263
1264         /*
1265          * Disallow low power states when the FW is down by taking
1266          * the UCODE_DOWN ref. in case of ongoing hw restart the
1267          * ref is already taken, so don't take it again.
1268          */
1269         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1270                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1271
1272         /* async_handlers_wk is now blocked */
1273
1274         /*
1275          * The work item could be running or queued if the
1276          * ROC time event stops just as we get here.
1277          */
1278         cancel_work_sync(&mvm->roc_done_wk);
1279
1280         iwl_trans_stop_device(mvm->trans);
1281
1282         iwl_mvm_async_handlers_purge(mvm);
1283         /* async_handlers_list is empty and will stay empty: HW is stopped */
1284
1285         /* the fw is stopped, the aux sta is dead: clean up driver state */
1286         iwl_mvm_del_aux_sta(mvm);
1287
1288         /*
1289          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1290          * won't be called in this case).
1291          */
1292         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1293
1294         mvm->ucode_loaded = false;
1295 }
1296
1297 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1298 {
1299         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1300
1301         flush_work(&mvm->d0i3_exit_work);
1302         flush_work(&mvm->async_handlers_wk);
1303         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1304         iwl_mvm_free_fw_dump_desc(mvm);
1305
1306         mutex_lock(&mvm->mutex);
1307         __iwl_mvm_mac_stop(mvm);
1308         mutex_unlock(&mvm->mutex);
1309
1310         /*
1311          * The worker might have been waiting for the mutex, let it run and
1312          * discover that its list is now empty.
1313          */
1314         cancel_work_sync(&mvm->async_handlers_wk);
1315 }
1316
1317 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1318 {
1319         u16 i;
1320
1321         lockdep_assert_held(&mvm->mutex);
1322
1323         for (i = 0; i < NUM_PHY_CTX; i++)
1324                 if (!mvm->phy_ctxts[i].ref)
1325                         return &mvm->phy_ctxts[i];
1326
1327         IWL_ERR(mvm, "No available PHY context\n");
1328         return NULL;
1329 }
1330
1331 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1332                                 s8 tx_power)
1333 {
1334         /* FW is in charge of regulatory enforcement */
1335         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1336                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1337                 .pwr_restriction = cpu_to_le16(tx_power),
1338         };
1339
1340         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1341                                     sizeof(reduce_txpwr_cmd),
1342                                     &reduce_txpwr_cmd);
1343 }
1344
1345 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1346                                      struct ieee80211_vif *vif)
1347 {
1348         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1349         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1350         int ret;
1351
1352         mvmvif->mvm = mvm;
1353
1354         /*
1355          * make sure D0i3 exit is completed, otherwise a target access
1356          * during tx queue configuration could be done when still in
1357          * D0i3 state.
1358          */
1359         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1360         if (ret)
1361                 return ret;
1362
1363         /*
1364          * Not much to do here. The stack will not allow interface
1365          * types or combinations that we didn't advertise, so we
1366          * don't really have to check the types.
1367          */
1368
1369         mutex_lock(&mvm->mutex);
1370
1371         /* make sure that beacon statistics don't go backwards with FW reset */
1372         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1373                 mvmvif->beacon_stats.accu_num_beacons +=
1374                         mvmvif->beacon_stats.num_beacons;
1375
1376         /* Allocate resources for the MAC context, and add it to the fw  */
1377         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1378         if (ret)
1379                 goto out_unlock;
1380
1381         /* Counting number of interfaces is needed for legacy PM */
1382         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1383                 mvm->vif_count++;
1384
1385         /*
1386          * The AP binding flow can be done only after the beacon
1387          * template is configured (which happens only in the mac80211
1388          * start_ap() flow), and adding the broadcast station can happen
1389          * only after the binding.
1390          * In addition, since modifying the MAC before adding a bcast
1391          * station is not allowed by the FW, delay the adding of MAC context to
1392          * the point where we can also add the bcast station.
1393          * In short: there's not much we can do at this point, other than
1394          * allocating resources :)
1395          */
1396         if (vif->type == NL80211_IFTYPE_AP ||
1397             vif->type == NL80211_IFTYPE_ADHOC) {
1398                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1399                 if (ret) {
1400                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1401                         goto out_release;
1402                 }
1403
1404                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1405                 goto out_unlock;
1406         }
1407
1408         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1409         if (ret)
1410                 goto out_release;
1411
1412         ret = iwl_mvm_power_update_mac(mvm);
1413         if (ret)
1414                 goto out_remove_mac;
1415
1416         /* beacon filtering */
1417         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1418         if (ret)
1419                 goto out_remove_mac;
1420
1421         if (!mvm->bf_allowed_vif &&
1422             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1423                 mvm->bf_allowed_vif = mvmvif;
1424                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1425                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1426         }
1427
1428         /*
1429          * P2P_DEVICE interface does not have a channel context assigned to it,
1430          * so a dedicated PHY context is allocated to it and the corresponding
1431          * MAC context is bound to it at this stage.
1432          */
1433         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1434
1435                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1436                 if (!mvmvif->phy_ctxt) {
1437                         ret = -ENOSPC;
1438                         goto out_free_bf;
1439                 }
1440
1441                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1442                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1443                 if (ret)
1444                         goto out_unref_phy;
1445
1446                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1447                 if (ret)
1448                         goto out_unbind;
1449
1450                 /* Save a pointer to p2p device vif, so it can later be used to
1451                  * update the p2p device MAC when a GO is started/stopped */
1452                 mvm->p2p_device_vif = vif;
1453         }
1454
1455         iwl_mvm_vif_dbgfs_register(mvm, vif);
1456         goto out_unlock;
1457
1458  out_unbind:
1459         iwl_mvm_binding_remove_vif(mvm, vif);
1460  out_unref_phy:
1461         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1462  out_free_bf:
1463         if (mvm->bf_allowed_vif == mvmvif) {
1464                 mvm->bf_allowed_vif = NULL;
1465                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1466                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1467         }
1468  out_remove_mac:
1469         mvmvif->phy_ctxt = NULL;
1470         iwl_mvm_mac_ctxt_remove(mvm, vif);
1471  out_release:
1472         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1473                 mvm->vif_count--;
1474
1475         iwl_mvm_mac_ctxt_release(mvm, vif);
1476  out_unlock:
1477         mutex_unlock(&mvm->mutex);
1478
1479         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1480
1481         return ret;
1482 }
1483
1484 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1485                                         struct ieee80211_vif *vif)
1486 {
1487         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1488
1489         if (tfd_msk) {
1490                 mutex_lock(&mvm->mutex);
1491                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1492                 mutex_unlock(&mvm->mutex);
1493         }
1494
1495         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1496                 /*
1497                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1498                  * We assume here that all the packets sent to the OFFCHANNEL
1499                  * queue are sent in ROC session.
1500                  */
1501                 flush_work(&mvm->roc_done_wk);
1502         } else {
1503                 /*
1504                  * By now, all the AC queues are empty. The AGG queues are
1505                  * empty too. We already got all the Tx responses for all the
1506                  * packets in the queues. The drain work can have been
1507                  * triggered. Flush it.
1508                  */
1509                 flush_work(&mvm->sta_drained_wk);
1510         }
1511 }
1512
1513 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1514                                          struct ieee80211_vif *vif)
1515 {
1516         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1517         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1518
1519         iwl_mvm_prepare_mac_removal(mvm, vif);
1520
1521         mutex_lock(&mvm->mutex);
1522
1523         if (mvm->bf_allowed_vif == mvmvif) {
1524                 mvm->bf_allowed_vif = NULL;
1525                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1526                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1527         }
1528
1529         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1530
1531         /*
1532          * For AP/GO interface, the tear down of the resources allocated to the
1533          * interface is be handled as part of the stop_ap flow.
1534          */
1535         if (vif->type == NL80211_IFTYPE_AP ||
1536             vif->type == NL80211_IFTYPE_ADHOC) {
1537 #ifdef CONFIG_NL80211_TESTMODE
1538                 if (vif == mvm->noa_vif) {
1539                         mvm->noa_vif = NULL;
1540                         mvm->noa_duration = 0;
1541                 }
1542 #endif
1543                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1544                 goto out_release;
1545         }
1546
1547         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1548                 mvm->p2p_device_vif = NULL;
1549                 iwl_mvm_rm_bcast_sta(mvm, vif);
1550                 iwl_mvm_binding_remove_vif(mvm, vif);
1551                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1552                 mvmvif->phy_ctxt = NULL;
1553         }
1554
1555         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1556                 mvm->vif_count--;
1557
1558         iwl_mvm_power_update_mac(mvm);
1559         iwl_mvm_mac_ctxt_remove(mvm, vif);
1560
1561 out_release:
1562         iwl_mvm_mac_ctxt_release(mvm, vif);
1563         mutex_unlock(&mvm->mutex);
1564 }
1565
1566 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1567 {
1568         return 0;
1569 }
1570
1571 struct iwl_mvm_mc_iter_data {
1572         struct iwl_mvm *mvm;
1573         int port_id;
1574 };
1575
1576 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1577                                       struct ieee80211_vif *vif)
1578 {
1579         struct iwl_mvm_mc_iter_data *data = _data;
1580         struct iwl_mvm *mvm = data->mvm;
1581         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1582         int ret, len;
1583
1584         /* if we don't have free ports, mcast frames will be dropped */
1585         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1586                 return;
1587
1588         if (vif->type != NL80211_IFTYPE_STATION ||
1589             !vif->bss_conf.assoc)
1590                 return;
1591
1592         cmd->port_id = data->port_id++;
1593         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1594         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1595
1596         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1597         if (ret)
1598                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1599 }
1600
1601 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1602 {
1603         struct iwl_mvm_mc_iter_data iter_data = {
1604                 .mvm = mvm,
1605         };
1606
1607         lockdep_assert_held(&mvm->mutex);
1608
1609         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1610                 return;
1611
1612         ieee80211_iterate_active_interfaces_atomic(
1613                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1614                 iwl_mvm_mc_iface_iterator, &iter_data);
1615 }
1616
1617 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1618                                      struct netdev_hw_addr_list *mc_list)
1619 {
1620         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1621         struct iwl_mcast_filter_cmd *cmd;
1622         struct netdev_hw_addr *addr;
1623         int addr_count;
1624         bool pass_all;
1625         int len;
1626
1627         addr_count = netdev_hw_addr_list_count(mc_list);
1628         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1629                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1630         if (pass_all)
1631                 addr_count = 0;
1632
1633         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1634         cmd = kzalloc(len, GFP_ATOMIC);
1635         if (!cmd)
1636                 return 0;
1637
1638         if (pass_all) {
1639                 cmd->pass_all = 1;
1640                 return (u64)(unsigned long)cmd;
1641         }
1642
1643         netdev_hw_addr_list_for_each(addr, mc_list) {
1644                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1645                                    cmd->count, addr->addr);
1646                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1647                        addr->addr, ETH_ALEN);
1648                 cmd->count++;
1649         }
1650
1651         return (u64)(unsigned long)cmd;
1652 }
1653
1654 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1655                                      unsigned int changed_flags,
1656                                      unsigned int *total_flags,
1657                                      u64 multicast)
1658 {
1659         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1660         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1661
1662         mutex_lock(&mvm->mutex);
1663
1664         /* replace previous configuration */
1665         kfree(mvm->mcast_filter_cmd);
1666         mvm->mcast_filter_cmd = cmd;
1667
1668         if (!cmd)
1669                 goto out;
1670
1671         iwl_mvm_recalc_multicast(mvm);
1672 out:
1673         mutex_unlock(&mvm->mutex);
1674         *total_flags = 0;
1675 }
1676
1677 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1678 struct iwl_bcast_iter_data {
1679         struct iwl_mvm *mvm;
1680         struct iwl_bcast_filter_cmd *cmd;
1681         u8 current_filter;
1682 };
1683
1684 static void
1685 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1686                          const struct iwl_fw_bcast_filter *in_filter,
1687                          struct iwl_fw_bcast_filter *out_filter)
1688 {
1689         struct iwl_fw_bcast_filter_attr *attr;
1690         int i;
1691
1692         memcpy(out_filter, in_filter, sizeof(*out_filter));
1693
1694         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1695                 attr = &out_filter->attrs[i];
1696
1697                 if (!attr->mask)
1698                         break;
1699
1700                 switch (attr->reserved1) {
1701                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1702                         if (vif->bss_conf.arp_addr_cnt != 1) {
1703                                 attr->mask = 0;
1704                                 continue;
1705                         }
1706
1707                         attr->val = vif->bss_conf.arp_addr_list[0];
1708                         break;
1709                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1710                         attr->val = *(__be32 *)&vif->addr[2];
1711                         break;
1712                 default:
1713                         break;
1714                 }
1715                 attr->reserved1 = 0;
1716                 out_filter->num_attrs++;
1717         }
1718 }
1719
1720 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1721                                           struct ieee80211_vif *vif)
1722 {
1723         struct iwl_bcast_iter_data *data = _data;
1724         struct iwl_mvm *mvm = data->mvm;
1725         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1726         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1727         struct iwl_fw_bcast_mac *bcast_mac;
1728         int i;
1729
1730         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1731                 return;
1732
1733         bcast_mac = &cmd->macs[mvmvif->id];
1734
1735         /*
1736          * enable filtering only for associated stations, but not for P2P
1737          * Clients
1738          */
1739         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1740             !vif->bss_conf.assoc)
1741                 return;
1742
1743         bcast_mac->default_discard = 1;
1744
1745         /* copy all configured filters */
1746         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1747                 /*
1748                  * Make sure we don't exceed our filters limit.
1749                  * if there is still a valid filter to be configured,
1750                  * be on the safe side and just allow bcast for this mac.
1751                  */
1752                 if (WARN_ON_ONCE(data->current_filter >=
1753                                  ARRAY_SIZE(cmd->filters))) {
1754                         bcast_mac->default_discard = 0;
1755                         bcast_mac->attached_filters = 0;
1756                         break;
1757                 }
1758
1759                 iwl_mvm_set_bcast_filter(vif,
1760                                          &mvm->bcast_filters[i],
1761                                          &cmd->filters[data->current_filter]);
1762
1763                 /* skip current filter if it contains no attributes */
1764                 if (!cmd->filters[data->current_filter].num_attrs)
1765                         continue;
1766
1767                 /* attach the filter to current mac */
1768                 bcast_mac->attached_filters |=
1769                                 cpu_to_le16(BIT(data->current_filter));
1770
1771                 data->current_filter++;
1772         }
1773 }
1774
1775 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1776                                     struct iwl_bcast_filter_cmd *cmd)
1777 {
1778         struct iwl_bcast_iter_data iter_data = {
1779                 .mvm = mvm,
1780                 .cmd = cmd,
1781         };
1782
1783         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1784                 return false;
1785
1786         memset(cmd, 0, sizeof(*cmd));
1787         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1788         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1789
1790 #ifdef CONFIG_IWLWIFI_DEBUGFS
1791         /* use debugfs filters/macs if override is configured */
1792         if (mvm->dbgfs_bcast_filtering.override) {
1793                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1794                        sizeof(cmd->filters));
1795                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1796                        sizeof(cmd->macs));
1797                 return true;
1798         }
1799 #endif
1800
1801         /* if no filters are configured, do nothing */
1802         if (!mvm->bcast_filters)
1803                 return false;
1804
1805         /* configure and attach these filters for each associated sta vif */
1806         ieee80211_iterate_active_interfaces(
1807                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1808                 iwl_mvm_bcast_filter_iterator, &iter_data);
1809
1810         return true;
1811 }
1812 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1813                                           struct ieee80211_vif *vif)
1814 {
1815         struct iwl_bcast_filter_cmd cmd;
1816
1817         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1818                 return 0;
1819
1820         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1821                 return 0;
1822
1823         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1824                                     sizeof(cmd), &cmd);
1825 }
1826 #else
1827 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1828                                                  struct ieee80211_vif *vif)
1829 {
1830         return 0;
1831 }
1832 #endif
1833
1834 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1835                                              struct ieee80211_vif *vif,
1836                                              struct ieee80211_bss_conf *bss_conf,
1837                                              u32 changes)
1838 {
1839         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1840         int ret;
1841
1842         /*
1843          * Re-calculate the tsf id, as the master-slave relations depend on the
1844          * beacon interval, which was not known when the station interface was
1845          * added.
1846          */
1847         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1848                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1849
1850         /*
1851          * If we're not associated yet, take the (new) BSSID before associating
1852          * so the firmware knows. If we're already associated, then use the old
1853          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1854          * branch for disassociation below.
1855          */
1856         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1857                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1858
1859         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1860         if (ret)
1861                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1862
1863         /* after sending it once, adopt mac80211 data */
1864         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1865         mvmvif->associated = bss_conf->assoc;
1866
1867         if (changes & BSS_CHANGED_ASSOC) {
1868                 if (bss_conf->assoc) {
1869                         /* clear statistics to get clean beacon counter */
1870                         iwl_mvm_request_statistics(mvm, true);
1871                         memset(&mvmvif->beacon_stats, 0,
1872                                sizeof(mvmvif->beacon_stats));
1873
1874                         /* add quota for this interface */
1875                         ret = iwl_mvm_update_quotas(mvm, NULL);
1876                         if (ret) {
1877                                 IWL_ERR(mvm, "failed to update quotas\n");
1878                                 return;
1879                         }
1880
1881                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1882                                      &mvm->status)) {
1883                                 /*
1884                                  * If we're restarting then the firmware will
1885                                  * obviously have lost synchronisation with
1886                                  * the AP. It will attempt to synchronise by
1887                                  * itself, but we can make it more reliable by
1888                                  * scheduling a session protection time event.
1889                                  *
1890                                  * The firmware needs to receive a beacon to
1891                                  * catch up with synchronisation, use 110% of
1892                                  * the beacon interval.
1893                                  *
1894                                  * Set a large maximum delay to allow for more
1895                                  * than a single interface.
1896                                  */
1897                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1898                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
1899                                                         5 * dur, false);
1900                         }
1901
1902                         iwl_mvm_sf_update(mvm, vif, false);
1903                         iwl_mvm_power_vif_assoc(mvm, vif);
1904                         if (vif->p2p) {
1905                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1906                                 iwl_mvm_update_smps(mvm, vif,
1907                                                     IWL_MVM_SMPS_REQ_PROT,
1908                                                     IEEE80211_SMPS_DYNAMIC);
1909                         }
1910                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1911                         /*
1912                          * If update fails - SF might be running in associated
1913                          * mode while disassociated - which is forbidden.
1914                          */
1915                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1916                                   "Failed to update SF upon disassociation\n");
1917
1918                         /* remove AP station now that the MAC is unassoc */
1919                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1920                         if (ret)
1921                                 IWL_ERR(mvm, "failed to remove AP station\n");
1922
1923                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1924                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1925                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1926                         /* remove quota for this interface */
1927                         ret = iwl_mvm_update_quotas(mvm, NULL);
1928                         if (ret)
1929                                 IWL_ERR(mvm, "failed to update quotas\n");
1930
1931                         if (vif->p2p)
1932                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1933
1934                         /* this will take the cleared BSSID from bss_conf */
1935                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1936                         if (ret)
1937                                 IWL_ERR(mvm,
1938                                         "failed to update MAC %pM (clear after unassoc)\n",
1939                                         vif->addr);
1940                 }
1941
1942                 iwl_mvm_recalc_multicast(mvm);
1943                 iwl_mvm_configure_bcast_filter(mvm, vif);
1944
1945                 /* reset rssi values */
1946                 mvmvif->bf_data.ave_beacon_signal = 0;
1947
1948                 iwl_mvm_bt_coex_vif_change(mvm);
1949                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1950                                     IEEE80211_SMPS_AUTOMATIC);
1951         } else if (changes & BSS_CHANGED_BEACON_INFO) {
1952                 /*
1953                  * We received a beacon _after_ association so
1954                  * remove the session protection.
1955                  */
1956                 iwl_mvm_remove_time_event(mvm, mvmvif,
1957                                           &mvmvif->time_event_data);
1958         }
1959
1960         if (changes & BSS_CHANGED_BEACON_INFO) {
1961                 iwl_mvm_sf_update(mvm, vif, false);
1962                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1963         }
1964
1965         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1966                 ret = iwl_mvm_power_update_mac(mvm);
1967                 if (ret)
1968                         IWL_ERR(mvm, "failed to update power mode\n");
1969         }
1970
1971         if (changes & BSS_CHANGED_TXPOWER) {
1972                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1973                                 bss_conf->txpower);
1974                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1975         }
1976
1977         if (changes & BSS_CHANGED_CQM) {
1978                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1979                 /* reset cqm events tracking */
1980                 mvmvif->bf_data.last_cqm_event = 0;
1981                 if (mvmvif->bf_data.bf_enabled) {
1982                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1983                         if (ret)
1984                                 IWL_ERR(mvm,
1985                                         "failed to update CQM thresholds\n");
1986                 }
1987         }
1988
1989         if (changes & BSS_CHANGED_ARP_FILTER) {
1990                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1991                 iwl_mvm_configure_bcast_filter(mvm, vif);
1992         }
1993 }
1994
1995 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1996                                  struct ieee80211_vif *vif)
1997 {
1998         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1999         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2000         int ret;
2001
2002         /*
2003          * iwl_mvm_mac_ctxt_add() might read directly from the device
2004          * (the system time), so make sure it is available.
2005          */
2006         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2007         if (ret)
2008                 return ret;
2009
2010         mutex_lock(&mvm->mutex);
2011
2012         /* Send the beacon template */
2013         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2014         if (ret)
2015                 goto out_unlock;
2016
2017         /*
2018          * Re-calculate the tsf id, as the master-slave relations depend on the
2019          * beacon interval, which was not known when the AP interface was added.
2020          */
2021         if (vif->type == NL80211_IFTYPE_AP)
2022                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2023
2024         /* Add the mac context */
2025         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2026         if (ret)
2027                 goto out_unlock;
2028
2029         /* Perform the binding */
2030         ret = iwl_mvm_binding_add_vif(mvm, vif);
2031         if (ret)
2032                 goto out_remove;
2033
2034         /* Send the bcast station. At this stage the TBTT and DTIM time events
2035          * are added and applied to the scheduler */
2036         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2037         if (ret)
2038                 goto out_unbind;
2039
2040         /* must be set before quota calculations */
2041         mvmvif->ap_ibss_active = true;
2042
2043         /* power updated needs to be done before quotas */
2044         iwl_mvm_power_update_mac(mvm);
2045
2046         ret = iwl_mvm_update_quotas(mvm, NULL);
2047         if (ret)
2048                 goto out_quota_failed;
2049
2050         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2051         if (vif->p2p && mvm->p2p_device_vif)
2052                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2053
2054         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2055
2056         iwl_mvm_bt_coex_vif_change(mvm);
2057
2058         /* we don't support TDLS during DCM */
2059         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2060                 iwl_mvm_teardown_tdls_peers(mvm);
2061
2062         mutex_unlock(&mvm->mutex);
2063         return 0;
2064
2065 out_quota_failed:
2066         iwl_mvm_power_update_mac(mvm);
2067         mvmvif->ap_ibss_active = false;
2068         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2069 out_unbind:
2070         iwl_mvm_binding_remove_vif(mvm, vif);
2071 out_remove:
2072         iwl_mvm_mac_ctxt_remove(mvm, vif);
2073 out_unlock:
2074         mutex_unlock(&mvm->mutex);
2075         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2076         return ret;
2077 }
2078
2079 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2080                                  struct ieee80211_vif *vif)
2081 {
2082         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2083         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2084
2085         iwl_mvm_prepare_mac_removal(mvm, vif);
2086
2087         mutex_lock(&mvm->mutex);
2088
2089         /* Handle AP stop while in CSA */
2090         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2091                 iwl_mvm_remove_time_event(mvm, mvmvif,
2092                                           &mvmvif->time_event_data);
2093                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2094         }
2095
2096         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2097                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2098                 mvm->csa_tx_block_bcn_timeout = 0;
2099         }
2100
2101         mvmvif->ap_ibss_active = false;
2102         mvm->ap_last_beacon_gp2 = 0;
2103
2104         iwl_mvm_bt_coex_vif_change(mvm);
2105
2106         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2107
2108         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2109         if (vif->p2p && mvm->p2p_device_vif)
2110                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2111
2112         iwl_mvm_update_quotas(mvm, NULL);
2113         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2114         iwl_mvm_binding_remove_vif(mvm, vif);
2115
2116         iwl_mvm_power_update_mac(mvm);
2117
2118         iwl_mvm_mac_ctxt_remove(mvm, vif);
2119
2120         mutex_unlock(&mvm->mutex);
2121 }
2122
2123 static void
2124 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2125                                  struct ieee80211_vif *vif,
2126                                  struct ieee80211_bss_conf *bss_conf,
2127                                  u32 changes)
2128 {
2129         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2130
2131         /* Changes will be applied when the AP/IBSS is started */
2132         if (!mvmvif->ap_ibss_active)
2133                 return;
2134
2135         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2136                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2137             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2138                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2139
2140         /* Need to send a new beacon template to the FW */
2141         if (changes & BSS_CHANGED_BEACON &&
2142             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2143                 IWL_WARN(mvm, "Failed updating beacon data\n");
2144
2145         if (changes & BSS_CHANGED_TXPOWER) {
2146                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2147                                 bss_conf->txpower);
2148                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2149         }
2150
2151 }
2152
2153 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2154                                      struct ieee80211_vif *vif,
2155                                      struct ieee80211_bss_conf *bss_conf,
2156                                      u32 changes)
2157 {
2158         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2159
2160         /*
2161          * iwl_mvm_bss_info_changed_station() might call
2162          * iwl_mvm_protect_session(), which reads directly from
2163          * the device (the system time), so make sure it is available.
2164          */
2165         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2166                 return;
2167
2168         mutex_lock(&mvm->mutex);
2169
2170         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2171                 iwl_mvm_scan_offload_stop(mvm, true);
2172
2173         switch (vif->type) {
2174         case NL80211_IFTYPE_STATION:
2175                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2176                 break;
2177         case NL80211_IFTYPE_AP:
2178         case NL80211_IFTYPE_ADHOC:
2179                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2180                 break;
2181         default:
2182                 /* shouldn't happen */
2183                 WARN_ON_ONCE(1);
2184         }
2185
2186         mutex_unlock(&mvm->mutex);
2187         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2188 }
2189
2190 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
2191                                           enum iwl_scan_status scan_type)
2192 {
2193         int ret;
2194         bool wait_for_handlers = false;
2195
2196         mutex_lock(&mvm->mutex);
2197
2198         if (mvm->scan_status != scan_type) {
2199                 ret = 0;
2200                 /* make sure there are no pending notifications */
2201                 wait_for_handlers = true;
2202                 goto out;
2203         }
2204
2205         switch (scan_type) {
2206         case IWL_MVM_SCAN_SCHED:
2207                 ret = iwl_mvm_scan_offload_stop(mvm, true);
2208                 break;
2209         case IWL_MVM_SCAN_OS:
2210                 ret = iwl_mvm_cancel_scan(mvm);
2211                 break;
2212         case IWL_MVM_SCAN_NONE:
2213         default:
2214                 WARN_ON_ONCE(1);
2215                 ret = -EINVAL;
2216                 break;
2217         }
2218         if (ret)
2219                 goto out;
2220
2221         wait_for_handlers = true;
2222 out:
2223         mutex_unlock(&mvm->mutex);
2224
2225         /* make sure we consume the completion notification */
2226         if (wait_for_handlers)
2227                 iwl_mvm_wait_for_async_handlers(mvm);
2228
2229         return ret;
2230 }
2231 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2232                                struct ieee80211_vif *vif,
2233                                struct ieee80211_scan_request *hw_req)
2234 {
2235         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2236         struct cfg80211_scan_request *req = &hw_req->req;
2237         int ret;
2238
2239         if (req->n_channels == 0 ||
2240             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
2241                 return -EINVAL;
2242
2243         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2244                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
2245                 if (ret)
2246                         return ret;
2247         }
2248
2249         mutex_lock(&mvm->mutex);
2250
2251         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2252                 ret = -EBUSY;
2253                 goto out;
2254         }
2255
2256         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
2257
2258         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2259                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
2260         else
2261                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
2262
2263         if (ret)
2264                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2265 out:
2266         mutex_unlock(&mvm->mutex);
2267         return ret;
2268 }
2269
2270 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2271                                        struct ieee80211_vif *vif)
2272 {
2273         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2274
2275         mutex_lock(&mvm->mutex);
2276
2277         /* Due to a race condition, it's possible that mac80211 asks
2278          * us to stop a hw_scan when it's already stopped.  This can
2279          * happen, for instance, if we stopped the scan ourselves,
2280          * called ieee80211_scan_completed() and the userspace called
2281          * cancel scan scan before ieee80211_scan_work() could run.
2282          * To handle that, simply return if the scan is not running.
2283         */
2284         /* FIXME: for now, we ignore this race for UMAC scans, since
2285          * they don't set the scan_status.
2286          */
2287         if ((mvm->scan_status == IWL_MVM_SCAN_OS) ||
2288             (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2289                 iwl_mvm_cancel_scan(mvm);
2290
2291         mutex_unlock(&mvm->mutex);
2292 }
2293
2294 static void
2295 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2296                                   struct ieee80211_sta *sta, u16 tids,
2297                                   int num_frames,
2298                                   enum ieee80211_frame_release_type reason,
2299                                   bool more_data)
2300 {
2301         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2302
2303         /* Called when we need to transmit (a) frame(s) from mac80211 */
2304
2305         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2306                                           tids, more_data, false);
2307 }
2308
2309 static void
2310 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2311                                     struct ieee80211_sta *sta, u16 tids,
2312                                     int num_frames,
2313                                     enum ieee80211_frame_release_type reason,
2314                                     bool more_data)
2315 {
2316         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2317
2318         /* Called when we need to transmit (a) frame(s) from agg queue */
2319
2320         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2321                                           tids, more_data, true);
2322 }
2323
2324 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2325                                    struct ieee80211_vif *vif,
2326                                    enum sta_notify_cmd cmd,
2327                                    struct ieee80211_sta *sta)
2328 {
2329         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2330         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2331         int tid;
2332
2333         switch (cmd) {
2334         case STA_NOTIFY_SLEEP:
2335                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2336                         ieee80211_sta_block_awake(hw, sta, true);
2337                 spin_lock_bh(&mvmsta->lock);
2338                 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2339                         struct iwl_mvm_tid_data *tid_data;
2340
2341                         tid_data = &mvmsta->tid_data[tid];
2342                         if (tid_data->state != IWL_AGG_ON &&
2343                             tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2344                                 continue;
2345                         if (iwl_mvm_tid_queued(tid_data) == 0)
2346                                 continue;
2347                         ieee80211_sta_set_buffered(sta, tid, true);
2348                 }
2349                 spin_unlock_bh(&mvmsta->lock);
2350                 /*
2351                  * The fw updates the STA to be asleep. Tx packets on the Tx
2352                  * queues to this station will not be transmitted. The fw will
2353                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2354                  */
2355                 break;
2356         case STA_NOTIFY_AWAKE:
2357                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2358                         break;
2359                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2360                 break;
2361         default:
2362                 break;
2363         }
2364 }
2365
2366 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2367                                        struct ieee80211_vif *vif,
2368                                        struct ieee80211_sta *sta)
2369 {
2370         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2371         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2372
2373         /*
2374          * This is called before mac80211 does RCU synchronisation,
2375          * so here we already invalidate our internal RCU-protected
2376          * station pointer. The rest of the code will thus no longer
2377          * be able to find the station this way, and we don't rely
2378          * on further RCU synchronisation after the sta_state()
2379          * callback deleted the station.
2380          */
2381         mutex_lock(&mvm->mutex);
2382         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2383                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2384                                    ERR_PTR(-ENOENT));
2385         mutex_unlock(&mvm->mutex);
2386 }
2387
2388 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2389                                 const u8 *bssid)
2390 {
2391         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2392                 return;
2393
2394         if (iwlwifi_mod_params.uapsd_disable) {
2395                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2396                 return;
2397         }
2398
2399         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2400 }
2401
2402 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2403                                  struct ieee80211_vif *vif,
2404                                  struct ieee80211_sta *sta,
2405                                  enum ieee80211_sta_state old_state,
2406                                  enum ieee80211_sta_state new_state)
2407 {
2408         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2409         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2410         int ret;
2411
2412         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2413                            sta->addr, old_state, new_state);
2414
2415         /* this would be a mac80211 bug ... but don't crash */
2416         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2417                 return -EINVAL;
2418
2419         /* if a STA is being removed, reuse its ID */
2420         flush_work(&mvm->sta_drained_wk);
2421
2422         mutex_lock(&mvm->mutex);
2423         if (old_state == IEEE80211_STA_NOTEXIST &&
2424             new_state == IEEE80211_STA_NONE) {
2425                 /*
2426                  * Firmware bug - it'll crash if the beacon interval is less
2427                  * than 16. We can't avoid connecting at all, so refuse the
2428                  * station state change, this will cause mac80211 to abandon
2429                  * attempts to connect to this AP, and eventually wpa_s will
2430                  * blacklist the AP...
2431                  */
2432                 if (vif->type == NL80211_IFTYPE_STATION &&
2433                     vif->bss_conf.beacon_int < 16) {
2434                         IWL_ERR(mvm,
2435                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2436                                 sta->addr, vif->bss_conf.beacon_int);
2437                         ret = -EINVAL;
2438                         goto out_unlock;
2439                 }
2440
2441                 if (sta->tdls &&
2442                     (vif->p2p ||
2443                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2444                                                 IWL_MVM_TDLS_STA_COUNT ||
2445                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2446                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2447                         ret = -EBUSY;
2448                         goto out_unlock;
2449                 }
2450
2451                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2452                 if (sta->tdls && ret == 0)
2453                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2454         } else if (old_state == IEEE80211_STA_NONE &&
2455                    new_state == IEEE80211_STA_AUTH) {
2456                 /*
2457                  * EBS may be disabled due to previous failures reported by FW.
2458                  * Reset EBS status here assuming environment has been changed.
2459                  */
2460                 mvm->last_ebs_successful = true;
2461                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2462                 ret = 0;
2463         } else if (old_state == IEEE80211_STA_AUTH &&
2464                    new_state == IEEE80211_STA_ASSOC) {
2465                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2466                 if (ret == 0)
2467                         iwl_mvm_rs_rate_init(mvm, sta,
2468                                              mvmvif->phy_ctxt->channel->band,
2469                                              true);
2470         } else if (old_state == IEEE80211_STA_ASSOC &&
2471                    new_state == IEEE80211_STA_AUTHORIZED) {
2472
2473                 /* we don't support TDLS during DCM */
2474                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2475                         iwl_mvm_teardown_tdls_peers(mvm);
2476
2477                 /* enable beacon filtering */
2478                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2479                 ret = 0;
2480         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2481                    new_state == IEEE80211_STA_ASSOC) {
2482                 /* disable beacon filtering */
2483                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2484                 ret = 0;
2485         } else if (old_state == IEEE80211_STA_ASSOC &&
2486                    new_state == IEEE80211_STA_AUTH) {
2487                 ret = 0;
2488         } else if (old_state == IEEE80211_STA_AUTH &&
2489                    new_state == IEEE80211_STA_NONE) {
2490                 ret = 0;
2491         } else if (old_state == IEEE80211_STA_NONE &&
2492                    new_state == IEEE80211_STA_NOTEXIST) {
2493                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2494                 if (sta->tdls)
2495                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2496         } else {
2497                 ret = -EIO;
2498         }
2499  out_unlock:
2500         mutex_unlock(&mvm->mutex);
2501
2502         if (sta->tdls && ret == 0) {
2503                 if (old_state == IEEE80211_STA_NOTEXIST &&
2504                     new_state == IEEE80211_STA_NONE)
2505                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2506                 else if (old_state == IEEE80211_STA_NONE &&
2507                          new_state == IEEE80211_STA_NOTEXIST)
2508                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2509         }
2510
2511         return ret;
2512 }
2513
2514 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2515 {
2516         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2517
2518         mvm->rts_threshold = value;
2519
2520         return 0;
2521 }
2522
2523 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2524                                   struct ieee80211_vif *vif,
2525                                   struct ieee80211_sta *sta, u32 changed)
2526 {
2527         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2528
2529         if (vif->type == NL80211_IFTYPE_STATION &&
2530             changed & IEEE80211_RC_NSS_CHANGED)
2531                 iwl_mvm_sf_update(mvm, vif, false);
2532 }
2533
2534 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2535                                struct ieee80211_vif *vif, u16 ac,
2536                                const struct ieee80211_tx_queue_params *params)
2537 {
2538         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2539         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2540
2541         mvmvif->queue_params[ac] = *params;
2542
2543         /*
2544          * No need to update right away, we'll get BSS_CHANGED_QOS
2545          * The exception is P2P_DEVICE interface which needs immediate update.
2546          */
2547         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2548                 int ret;
2549
2550                 mutex_lock(&mvm->mutex);
2551                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2552                 mutex_unlock(&mvm->mutex);
2553                 return ret;
2554         }
2555         return 0;
2556 }
2557
2558 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2559                                       struct ieee80211_vif *vif)
2560 {
2561         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2562         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2563                            200 + vif->bss_conf.beacon_int);
2564         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2565                                100 + vif->bss_conf.beacon_int);
2566
2567         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2568                 return;
2569
2570         /*
2571          * iwl_mvm_protect_session() reads directly from the device
2572          * (the system time), so make sure it is available.
2573          */
2574         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2575                 return;
2576
2577         mutex_lock(&mvm->mutex);
2578         /* Try really hard to protect the session and hear a beacon */
2579         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2580         mutex_unlock(&mvm->mutex);
2581
2582         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2583 }
2584
2585 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2586                                         struct ieee80211_vif *vif,
2587                                         struct cfg80211_sched_scan_request *req,
2588                                         struct ieee80211_scan_ies *ies)
2589 {
2590         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2591         int ret;
2592
2593         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2594                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2595                 if (ret)
2596                         return ret;
2597         }
2598
2599         mutex_lock(&mvm->mutex);
2600
2601         if (!vif->bss_conf.idle) {
2602                 ret = -EBUSY;
2603                 goto out;
2604         }
2605
2606         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2607                 ret = -EBUSY;
2608                 goto out;
2609         }
2610
2611         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2612         if (ret)
2613                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2614
2615 out:
2616         mutex_unlock(&mvm->mutex);
2617         return ret;
2618 }
2619
2620 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2621                                        struct ieee80211_vif *vif)
2622 {
2623         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2624         int ret;
2625
2626         mutex_lock(&mvm->mutex);
2627
2628         /* Due to a race condition, it's possible that mac80211 asks
2629          * us to stop a sched_scan when it's already stopped.  This
2630          * can happen, for instance, if we stopped the scan ourselves,
2631          * called ieee80211_sched_scan_stopped() and the userspace called
2632          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2633          * could run.  To handle this, simply return if the scan is
2634          * not running.
2635         */
2636         /* FIXME: for now, we ignore this race for UMAC scans, since
2637          * they don't set the scan_status.
2638          */
2639         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
2640             !(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2641                 mutex_unlock(&mvm->mutex);
2642                 return 0;
2643         }
2644
2645         ret = iwl_mvm_scan_offload_stop(mvm, false);
2646         mutex_unlock(&mvm->mutex);
2647         iwl_mvm_wait_for_async_handlers(mvm);
2648
2649         return ret;
2650 }
2651
2652 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2653                                enum set_key_cmd cmd,
2654                                struct ieee80211_vif *vif,
2655                                struct ieee80211_sta *sta,
2656                                struct ieee80211_key_conf *key)
2657 {
2658         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2659         int ret;
2660
2661         if (iwlwifi_mod_params.sw_crypto) {
2662                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2663                 return -EOPNOTSUPP;
2664         }
2665
2666         switch (key->cipher) {
2667         case WLAN_CIPHER_SUITE_TKIP:
2668                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2669                 /* fall-through */
2670         case WLAN_CIPHER_SUITE_CCMP:
2671                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2672                 break;
2673         case WLAN_CIPHER_SUITE_AES_CMAC:
2674                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2675                 break;
2676         case WLAN_CIPHER_SUITE_WEP40:
2677         case WLAN_CIPHER_SUITE_WEP104:
2678                 /* For non-client mode, only use WEP keys for TX as we probably
2679                  * don't have a station yet anyway and would then have to keep
2680                  * track of the keys, linking them to each of the clients/peers
2681                  * as they appear. For now, don't do that, for performance WEP
2682                  * offload doesn't really matter much, but we need it for some
2683                  * other offload features in client mode.
2684                  */
2685                 if (vif->type != NL80211_IFTYPE_STATION)
2686                         return 0;
2687                 break;
2688         default:
2689                 /* currently FW supports only one optional cipher scheme */
2690                 if (hw->n_cipher_schemes &&
2691                     hw->cipher_schemes->cipher == key->cipher)
2692                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2693                 else
2694                         return -EOPNOTSUPP;
2695         }
2696
2697         mutex_lock(&mvm->mutex);
2698
2699         switch (cmd) {
2700         case SET_KEY:
2701                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2702                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2703                         /*
2704                          * GTK on AP interface is a TX-only key, return 0;
2705                          * on IBSS they're per-station and because we're lazy
2706                          * we don't support them for RX, so do the same.
2707                          */
2708                         ret = 0;
2709                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2710                         break;
2711                 }
2712
2713                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2714                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2715                 if (ret) {
2716                         IWL_WARN(mvm, "set key failed\n");
2717                         /*
2718                          * can't add key for RX, but we don't need it
2719                          * in the device for TX so still return 0
2720                          */
2721                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2722                         ret = 0;
2723                 }
2724
2725                 break;
2726         case DISABLE_KEY:
2727                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2728                         ret = 0;
2729                         break;
2730                 }
2731
2732                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2733                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2734                 break;
2735         default:
2736                 ret = -EINVAL;
2737         }
2738
2739         mutex_unlock(&mvm->mutex);
2740         return ret;
2741 }
2742
2743 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2744                                         struct ieee80211_vif *vif,
2745                                         struct ieee80211_key_conf *keyconf,
2746                                         struct ieee80211_sta *sta,
2747                                         u32 iv32, u16 *phase1key)
2748 {
2749         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2750
2751         if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2752                 return;
2753
2754         iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2755 }
2756
2757
2758 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2759                                struct iwl_rx_packet *pkt, void *data)
2760 {
2761         struct iwl_mvm *mvm =
2762                 container_of(notif_wait, struct iwl_mvm, notif_wait);
2763         struct iwl_hs20_roc_res *resp;
2764         int resp_len = iwl_rx_packet_payload_len(pkt);
2765         struct iwl_mvm_time_event_data *te_data = data;
2766
2767         if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2768                 return true;
2769
2770         if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2771                 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2772                 return true;
2773         }
2774
2775         resp = (void *)pkt->data;
2776
2777         IWL_DEBUG_TE(mvm,
2778                      "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2779                      resp->status, resp->event_unique_id);
2780
2781         te_data->uid = le32_to_cpu(resp->event_unique_id);
2782         IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2783                      te_data->uid);
2784
2785         spin_lock_bh(&mvm->time_event_lock);
2786         list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2787         spin_unlock_bh(&mvm->time_event_lock);
2788
2789         return true;
2790 }
2791
2792 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2793 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2794                                     struct ieee80211_channel *channel,
2795                                     struct ieee80211_vif *vif,
2796                                     int duration)
2797 {
2798         int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2799         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2800         struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2801         static const u8 time_event_response[] = { HOT_SPOT_CMD };
2802         struct iwl_notification_wait wait_time_event;
2803         struct iwl_hs20_roc_req aux_roc_req = {
2804                 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2805                 .id_and_color =
2806                         cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2807                 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2808                 /* Set the channel info data */
2809                 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2810                         PHY_BAND_24 : PHY_BAND_5,
2811                 .channel_info.channel = channel->hw_value,
2812                 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2813                 /* Set the time and duration */
2814                 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2815                 .apply_time_max_delay =
2816                         cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2817                 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2818          };
2819
2820         /* Set the node address */
2821         memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2822
2823         lockdep_assert_held(&mvm->mutex);
2824
2825         spin_lock_bh(&mvm->time_event_lock);
2826
2827         if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2828                 spin_unlock_bh(&mvm->time_event_lock);
2829                 return -EIO;
2830         }
2831
2832         te_data->vif = vif;
2833         te_data->duration = duration;
2834         te_data->id = HOT_SPOT_CMD;
2835
2836         spin_unlock_bh(&mvm->time_event_lock);
2837
2838         /*
2839          * Use a notification wait, which really just processes the
2840          * command response and doesn't wait for anything, in order
2841          * to be able to process the response and get the UID inside
2842          * the RX path. Using CMD_WANT_SKB doesn't work because it
2843          * stores the buffer and then wakes up this thread, by which
2844          * time another notification (that the time event started)
2845          * might already be processed unsuccessfully.
2846          */
2847         iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2848                                    time_event_response,
2849                                    ARRAY_SIZE(time_event_response),
2850                                    iwl_mvm_rx_aux_roc, te_data);
2851
2852         res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2853                                    &aux_roc_req);
2854
2855         if (res) {
2856                 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2857                 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2858                 goto out_clear_te;
2859         }
2860
2861         /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2862         res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2863         /* should never fail */
2864         WARN_ON_ONCE(res);
2865
2866         if (res) {
2867  out_clear_te:
2868                 spin_lock_bh(&mvm->time_event_lock);
2869                 iwl_mvm_te_clear_data(mvm, te_data);
2870                 spin_unlock_bh(&mvm->time_event_lock);
2871         }
2872
2873         return res;
2874 }
2875
2876 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2877                        struct ieee80211_vif *vif,
2878                        struct ieee80211_channel *channel,
2879                        int duration,
2880                        enum ieee80211_roc_type type)
2881 {
2882         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2883         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2884         struct cfg80211_chan_def chandef;
2885         struct iwl_mvm_phy_ctxt *phy_ctxt;
2886         int ret, i;
2887
2888         IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2889                            duration, type);
2890
2891         mutex_lock(&mvm->mutex);
2892
2893         switch (vif->type) {
2894         case NL80211_IFTYPE_STATION:
2895                 if (mvm->fw->ucode_capa.capa[0] &
2896                     IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
2897                         /* Use aux roc framework (HS20) */
2898                         ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2899                                                        vif, duration);
2900                         goto out_unlock;
2901                 }
2902                 IWL_ERR(mvm, "hotspot not supported\n");
2903                 ret = -EINVAL;
2904                 goto out_unlock;
2905         case NL80211_IFTYPE_P2P_DEVICE:
2906                 /* handle below */
2907                 break;
2908         default:
2909                 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2910                 ret = -EINVAL;
2911                 goto out_unlock;
2912         }
2913
2914         for (i = 0; i < NUM_PHY_CTX; i++) {
2915                 phy_ctxt = &mvm->phy_ctxts[i];
2916                 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2917                         continue;
2918
2919                 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2920                         /*
2921                          * Unbind the P2P_DEVICE from the current PHY context,
2922                          * and if the PHY context is not used remove it.
2923                          */
2924                         ret = iwl_mvm_binding_remove_vif(mvm, vif);
2925                         if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2926                                 goto out_unlock;
2927
2928                         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2929
2930                         /* Bind the P2P_DEVICE to the current PHY Context */
2931                         mvmvif->phy_ctxt = phy_ctxt;
2932
2933                         ret = iwl_mvm_binding_add_vif(mvm, vif);
2934                         if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2935                                 goto out_unlock;
2936
2937                         iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2938                         goto schedule_time_event;
2939                 }
2940         }
2941
2942         /* Need to update the PHY context only if the ROC channel changed */
2943         if (channel == mvmvif->phy_ctxt->channel)
2944                 goto schedule_time_event;
2945
2946         cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2947
2948         /*
2949          * Change the PHY context configuration as it is currently referenced
2950          * only by the P2P Device MAC
2951          */
2952         if (mvmvif->phy_ctxt->ref == 1) {
2953                 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2954                                                &chandef, 1, 1);
2955                 if (ret)
2956                         goto out_unlock;
2957         } else {
2958                 /*
2959                  * The PHY context is shared with other MACs. Need to remove the
2960                  * P2P Device from the binding, allocate an new PHY context and
2961                  * create a new binding
2962                  */
2963                 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2964                 if (!phy_ctxt) {
2965                         ret = -ENOSPC;
2966                         goto out_unlock;
2967                 }
2968
2969                 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2970                                                1, 1);
2971                 if (ret) {
2972                         IWL_ERR(mvm, "Failed to change PHY context\n");
2973                         goto out_unlock;
2974                 }
2975
2976                 /* Unbind the P2P_DEVICE from the current PHY context */
2977                 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2978                 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2979                         goto out_unlock;
2980
2981                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2982
2983                 /* Bind the P2P_DEVICE to the new allocated PHY context */
2984                 mvmvif->phy_ctxt = phy_ctxt;
2985
2986                 ret = iwl_mvm_binding_add_vif(mvm, vif);
2987                 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2988                         goto out_unlock;
2989
2990                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2991         }
2992
2993 schedule_time_event:
2994         /* Schedule the time events */
2995         ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2996
2997 out_unlock:
2998         mutex_unlock(&mvm->mutex);
2999         IWL_DEBUG_MAC80211(mvm, "leave\n");
3000         return ret;
3001 }
3002
3003 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
3004 {
3005         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3006
3007         IWL_DEBUG_MAC80211(mvm, "enter\n");
3008
3009         mutex_lock(&mvm->mutex);
3010         iwl_mvm_stop_roc(mvm);
3011         mutex_unlock(&mvm->mutex);
3012
3013         IWL_DEBUG_MAC80211(mvm, "leave\n");
3014         return 0;
3015 }
3016
3017 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
3018                                  struct ieee80211_chanctx_conf *ctx)
3019 {
3020         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3021         struct iwl_mvm_phy_ctxt *phy_ctxt;
3022         int ret;
3023
3024         lockdep_assert_held(&mvm->mutex);
3025
3026         IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
3027
3028         phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
3029         if (!phy_ctxt) {
3030                 ret = -ENOSPC;
3031                 goto out;
3032         }
3033
3034         ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3035                                        ctx->rx_chains_static,
3036                                        ctx->rx_chains_dynamic);
3037         if (ret) {
3038                 IWL_ERR(mvm, "Failed to add PHY context\n");
3039                 goto out;
3040         }
3041
3042         iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
3043         *phy_ctxt_id = phy_ctxt->id;
3044 out:
3045         return ret;
3046 }
3047
3048 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
3049                                struct ieee80211_chanctx_conf *ctx)
3050 {
3051         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3052         int ret;
3053
3054         mutex_lock(&mvm->mutex);
3055         ret = __iwl_mvm_add_chanctx(mvm, ctx);
3056         mutex_unlock(&mvm->mutex);
3057
3058         return ret;
3059 }
3060
3061 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
3062                                      struct ieee80211_chanctx_conf *ctx)
3063 {
3064         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3065         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3066
3067         lockdep_assert_held(&mvm->mutex);
3068
3069         iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
3070 }
3071
3072 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
3073                                    struct ieee80211_chanctx_conf *ctx)
3074 {
3075         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3076
3077         mutex_lock(&mvm->mutex);
3078         __iwl_mvm_remove_chanctx(mvm, ctx);
3079         mutex_unlock(&mvm->mutex);
3080 }
3081
3082 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
3083                                    struct ieee80211_chanctx_conf *ctx,
3084                                    u32 changed)
3085 {
3086         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3087         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3088         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3089
3090         if (WARN_ONCE((phy_ctxt->ref > 1) &&
3091                       (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
3092                                    IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
3093                                    IEEE80211_CHANCTX_CHANGE_RADAR |
3094                                    IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
3095                       "Cannot change PHY. Ref=%d, changed=0x%X\n",
3096                       phy_ctxt->ref, changed))
3097                 return;
3098
3099         mutex_lock(&mvm->mutex);
3100         iwl_mvm_bt_coex_vif_change(mvm);
3101         iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
3102                                  ctx->rx_chains_static,
3103                                  ctx->rx_chains_dynamic);
3104         mutex_unlock(&mvm->mutex);
3105 }
3106
3107 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
3108                                         struct ieee80211_vif *vif,
3109                                         struct ieee80211_chanctx_conf *ctx,
3110                                         bool switching_chanctx)
3111 {
3112         u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
3113         struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
3114         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3115         int ret;
3116
3117         lockdep_assert_held(&mvm->mutex);
3118
3119         mvmvif->phy_ctxt = phy_ctxt;
3120
3121         switch (vif->type) {
3122         case NL80211_IFTYPE_AP:
3123                 /* only needed if we're switching chanctx (i.e. during CSA) */
3124                 if (switching_chanctx) {
3125                         mvmvif->ap_ibss_active = true;
3126                         break;
3127                 }
3128         case NL80211_IFTYPE_ADHOC:
3129                 /*
3130                  * The AP binding flow is handled as part of the start_ap flow
3131                  * (in bss_info_changed), similarly for IBSS.
3132                  */
3133                 ret = 0;
3134                 goto out;
3135         case NL80211_IFTYPE_STATION:
3136                 break;
3137         case NL80211_IFTYPE_MONITOR:
3138                 /* always disable PS when a monitor interface is active */
3139                 mvmvif->ps_disabled = true;
3140                 break;
3141         default:
3142                 ret = -EINVAL;
3143                 goto out;
3144         }
3145
3146         ret = iwl_mvm_binding_add_vif(mvm, vif);
3147         if (ret)
3148                 goto out;
3149
3150         /*
3151          * Power state must be updated before quotas,
3152          * otherwise fw will complain.
3153          */
3154         iwl_mvm_power_update_mac(mvm);
3155
3156         /* Setting the quota at this stage is only required for monitor
3157          * interfaces. For the other types, the bss_info changed flow
3158          * will handle quota settings.
3159          */
3160         if (vif->type == NL80211_IFTYPE_MONITOR) {
3161                 mvmvif->monitor_active = true;
3162                 ret = iwl_mvm_update_quotas(mvm, NULL);
3163                 if (ret)
3164                         goto out_remove_binding;
3165         }
3166
3167         /* Handle binding during CSA */
3168         if (vif->type == NL80211_IFTYPE_AP) {
3169                 iwl_mvm_update_quotas(mvm, NULL);
3170                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3171         }
3172
3173         if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
3174                 u32 duration = 2 * vif->bss_conf.beacon_int;
3175
3176                 /* iwl_mvm_protect_session() reads directly from the
3177                  * device (the system time), so make sure it is
3178                  * available.
3179                  */
3180                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
3181                 if (ret)
3182                         goto out_remove_binding;
3183
3184                 /* Protect the session to make sure we hear the first
3185                  * beacon on the new channel.
3186                  */
3187                 iwl_mvm_protect_session(mvm, vif, duration, duration,
3188                                         vif->bss_conf.beacon_int / 2,
3189                                         true);
3190
3191                 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
3192
3193                 iwl_mvm_update_quotas(mvm, NULL);
3194         }
3195
3196         goto out;
3197
3198 out_remove_binding:
3199         iwl_mvm_binding_remove_vif(mvm, vif);
3200         iwl_mvm_power_update_mac(mvm);
3201 out:
3202         if (ret)
3203                 mvmvif->phy_ctxt = NULL;
3204         return ret;
3205 }
3206 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
3207                                       struct ieee80211_vif *vif,
3208                                       struct ieee80211_chanctx_conf *ctx)
3209 {
3210         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3211         int ret;
3212
3213         mutex_lock(&mvm->mutex);
3214         ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
3215         mutex_unlock(&mvm->mutex);
3216
3217         return ret;
3218 }
3219
3220 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
3221                                            struct ieee80211_vif *vif,
3222                                            struct ieee80211_chanctx_conf *ctx,
3223                                            bool switching_chanctx)
3224 {
3225         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3226         struct ieee80211_vif *disabled_vif = NULL;
3227
3228         lockdep_assert_held(&mvm->mutex);
3229
3230         iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
3231
3232         switch (vif->type) {
3233         case NL80211_IFTYPE_ADHOC:
3234                 goto out;
3235         case NL80211_IFTYPE_MONITOR:
3236                 mvmvif->monitor_active = false;
3237                 mvmvif->ps_disabled = false;
3238                 break;
3239         case NL80211_IFTYPE_AP:
3240                 /* This part is triggered only during CSA */
3241                 if (!switching_chanctx || !mvmvif->ap_ibss_active)
3242                         goto out;
3243
3244                 mvmvif->csa_countdown = false;
3245
3246                 /* Set CS bit on all the stations */
3247                 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
3248
3249                 /* Save blocked iface, the timeout is set on the next beacon */
3250                 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
3251
3252                 mvmvif->ap_ibss_active = false;
3253                 break;
3254         case NL80211_IFTYPE_STATION:
3255                 if (!switching_chanctx)
3256                         break;
3257
3258                 disabled_vif = vif;
3259
3260                 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
3261                 break;
3262         default:
3263                 break;
3264         }
3265
3266         iwl_mvm_update_quotas(mvm, disabled_vif);
3267         iwl_mvm_binding_remove_vif(mvm, vif);
3268
3269 out:
3270         mvmvif->phy_ctxt = NULL;
3271         iwl_mvm_power_update_mac(mvm);
3272 }
3273
3274 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
3275                                          struct ieee80211_vif *vif,
3276                                          struct ieee80211_chanctx_conf *ctx)
3277 {
3278         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3279
3280         mutex_lock(&mvm->mutex);
3281         __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
3282         mutex_unlock(&mvm->mutex);
3283 }
3284
3285 static int
3286 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
3287                                 struct ieee80211_vif_chanctx_switch *vifs)
3288 {
3289         int ret;
3290
3291         mutex_lock(&mvm->mutex);
3292         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3293         __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
3294
3295         ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
3296         if (ret) {
3297                 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
3298                 goto out_reassign;
3299         }
3300
3301         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3302                                            true);
3303         if (ret) {
3304                 IWL_ERR(mvm,
3305                         "failed to assign new_ctx during channel switch\n");
3306                 goto out_remove;
3307         }
3308
3309         /* we don't support TDLS during DCM - can be caused by channel switch */
3310         if (iwl_mvm_phy_ctx_count(mvm) > 1)
3311                 iwl_mvm_teardown_tdls_peers(mvm);
3312
3313         goto out;
3314
3315 out_remove:
3316         __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3317
3318 out_reassign:
3319         if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3320                 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3321                 goto out_restart;
3322         }
3323
3324         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3325                                          true)) {
3326                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3327                 goto out_restart;
3328         }
3329
3330         goto out;
3331
3332 out_restart:
3333         /* things keep failing, better restart the hw */
3334         iwl_mvm_nic_restart(mvm, false);
3335
3336 out:
3337         mutex_unlock(&mvm->mutex);
3338
3339         return ret;
3340 }
3341
3342 static int
3343 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3344                                     struct ieee80211_vif_chanctx_switch *vifs)
3345 {
3346         int ret;
3347
3348         mutex_lock(&mvm->mutex);
3349         __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3350
3351         ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3352                                            true);
3353         if (ret) {
3354                 IWL_ERR(mvm,
3355                         "failed to assign new_ctx during channel switch\n");
3356                 goto out_reassign;
3357         }
3358
3359         goto out;
3360
3361 out_reassign:
3362         if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3363                                          true)) {
3364                 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3365                 goto out_restart;
3366         }
3367
3368         goto out;
3369
3370 out_restart:
3371         /* things keep failing, better restart the hw */
3372         iwl_mvm_nic_restart(mvm, false);
3373
3374 out:
3375         mutex_unlock(&mvm->mutex);
3376
3377         return ret;
3378 }
3379
3380 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3381                                       struct ieee80211_vif_chanctx_switch *vifs,
3382                                       int n_vifs,
3383                                       enum ieee80211_chanctx_switch_mode mode)
3384 {
3385         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3386         int ret;
3387
3388         /* we only support a single-vif right now */
3389         if (n_vifs > 1)
3390                 return -EOPNOTSUPP;
3391
3392         switch (mode) {
3393         case CHANCTX_SWMODE_SWAP_CONTEXTS:
3394                 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3395                 break;
3396         case CHANCTX_SWMODE_REASSIGN_VIF:
3397                 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3398                 break;
3399         default:
3400                 ret = -EOPNOTSUPP;
3401                 break;
3402         }
3403
3404         return ret;
3405 }
3406
3407 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3408                            struct ieee80211_sta *sta,
3409                            bool set)
3410 {
3411         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3412         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
3413
3414         if (!mvm_sta || !mvm_sta->vif) {
3415                 IWL_ERR(mvm, "Station is not associated to a vif\n");
3416                 return -EINVAL;
3417         }
3418
3419         return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3420 }
3421
3422 #ifdef CONFIG_NL80211_TESTMODE
3423 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3424         [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3425         [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3426         [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3427 };
3428
3429 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3430                                       struct ieee80211_vif *vif,
3431                                       void *data, int len)
3432 {
3433         struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3434         int err;
3435         u32 noa_duration;
3436
3437         err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3438         if (err)
3439                 return err;
3440
3441         if (!tb[IWL_MVM_TM_ATTR_CMD])
3442                 return -EINVAL;
3443
3444         switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3445         case IWL_MVM_TM_CMD_SET_NOA:
3446                 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3447                     !vif->bss_conf.enable_beacon ||
3448                     !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3449                         return -EINVAL;
3450
3451                 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3452                 if (noa_duration >= vif->bss_conf.beacon_int)
3453                         return -EINVAL;
3454
3455                 mvm->noa_duration = noa_duration;
3456                 mvm->noa_vif = vif;
3457
3458                 return iwl_mvm_update_quotas(mvm, NULL);
3459         case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3460                 /* must be associated client vif - ignore authorized */
3461                 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3462                     !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3463                     !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3464                         return -EINVAL;
3465
3466                 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3467                         return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3468                 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3469         }
3470
3471         return -EOPNOTSUPP;
3472 }
3473
3474 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3475                                     struct ieee80211_vif *vif,
3476                                     void *data, int len)
3477 {
3478         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3479         int err;
3480
3481         mutex_lock(&mvm->mutex);
3482         err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3483         mutex_unlock(&mvm->mutex);
3484
3485         return err;
3486 }
3487 #endif
3488
3489 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3490                                    struct ieee80211_vif *vif,
3491                                    struct ieee80211_channel_switch *chsw)
3492 {
3493         /* By implementing this operation, we prevent mac80211 from
3494          * starting its own channel switch timer, so that we can call
3495          * ieee80211_chswitch_done() ourselves at the right time
3496          * (which is when the absence time event starts).
3497          */
3498
3499         IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3500                            "dummy channel switch op\n");
3501 }
3502
3503 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3504                                       struct ieee80211_vif *vif,
3505                                       struct ieee80211_channel_switch *chsw)
3506 {
3507         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3508         struct ieee80211_vif *csa_vif;
3509         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3510         u32 apply_time;
3511         int ret;
3512
3513         mutex_lock(&mvm->mutex);
3514
3515         IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3516                            chsw->chandef.center_freq1);
3517
3518         iwl_fw_dbg_trigger_simple_stop(mvm, vif, FW_DBG_TRIGGER_CHANNEL_SWITCH,
3519                                        NULL, 0);
3520
3521         switch (vif->type) {
3522         case NL80211_IFTYPE_AP:
3523                 csa_vif =
3524                         rcu_dereference_protected(mvm->csa_vif,
3525                                                   lockdep_is_held(&mvm->mutex));
3526                 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3527                               "Another CSA is already in progress")) {
3528                         ret = -EBUSY;
3529                         goto out_unlock;
3530                 }
3531
3532                 rcu_assign_pointer(mvm->csa_vif, vif);
3533
3534                 if (WARN_ONCE(mvmvif->csa_countdown,
3535                               "Previous CSA countdown didn't complete")) {
3536                         ret = -EBUSY;
3537                         goto out_unlock;
3538                 }
3539
3540                 break;
3541         case NL80211_IFTYPE_STATION:
3542                 /* Schedule the time event to a bit before beacon 1,
3543                  * to make sure we're in the new channel when the
3544                  * GO/AP arrives.
3545                  */
3546                 apply_time = chsw->device_timestamp +
3547                         ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3548                           IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3549
3550                 if (chsw->block_tx)
3551                         iwl_mvm_csa_client_absent(mvm, vif);
3552
3553                 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3554                                             apply_time);
3555                 if (mvmvif->bf_data.bf_enabled) {
3556                         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3557                         if (ret)
3558                                 goto out_unlock;
3559                 }
3560
3561                 break;
3562         default:
3563                 break;
3564         }
3565
3566         mvmvif->ps_disabled = true;
3567
3568         ret = iwl_mvm_power_update_ps(mvm);
3569         if (ret)
3570                 goto out_unlock;
3571
3572         /* we won't be on this channel any longer */
3573         iwl_mvm_teardown_tdls_peers(mvm);
3574
3575 out_unlock:
3576         mutex_unlock(&mvm->mutex);
3577
3578         return ret;
3579 }
3580
3581 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3582                                        struct ieee80211_vif *vif)
3583 {
3584         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3585         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3586         int ret;
3587
3588         mutex_lock(&mvm->mutex);
3589
3590         if (vif->type == NL80211_IFTYPE_STATION) {
3591                 struct iwl_mvm_sta *mvmsta;
3592
3593                 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3594                                                           mvmvif->ap_sta_id);
3595
3596                 if (WARN_ON(!mvmsta)) {
3597                         ret = -EIO;
3598                         goto out_unlock;
3599                 }
3600
3601                 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3602
3603                 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3604
3605                 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3606                 if (ret)
3607                         goto out_unlock;
3608
3609                 iwl_mvm_stop_session_protection(mvm, vif);
3610         }
3611
3612         mvmvif->ps_disabled = false;
3613
3614         ret = iwl_mvm_power_update_ps(mvm);
3615
3616 out_unlock:
3617         mutex_unlock(&mvm->mutex);
3618
3619         return ret;
3620 }
3621
3622 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3623                               struct ieee80211_vif *vif, u32 queues, bool drop)
3624 {
3625         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3626         struct iwl_mvm_vif *mvmvif;
3627         struct iwl_mvm_sta *mvmsta;
3628         struct ieee80211_sta *sta;
3629         int i;
3630         u32 msk = 0;
3631
3632         if (!vif || vif->type != NL80211_IFTYPE_STATION)
3633                 return;
3634
3635         mutex_lock(&mvm->mutex);
3636         mvmvif = iwl_mvm_vif_from_mac80211(vif);
3637
3638         /* flush the AP-station and all TDLS peers */
3639         for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3640                 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3641                                                 lockdep_is_held(&mvm->mutex));
3642                 if (IS_ERR_OR_NULL(sta))
3643                         continue;
3644
3645                 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3646                 if (mvmsta->vif != vif)
3647                         continue;
3648
3649                 /* make sure only TDLS peers or the AP are flushed */
3650                 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3651
3652                 msk |= mvmsta->tfd_queue_msk;
3653         }
3654
3655         if (drop) {
3656                 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3657                         IWL_ERR(mvm, "flush request fail\n");
3658                 mutex_unlock(&mvm->mutex);
3659         } else {
3660                 mutex_unlock(&mvm->mutex);
3661
3662                 /* this can take a while, and we may need/want other operations
3663                  * to succeed while doing this, so do it without the mutex held
3664                  */
3665                 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3666         }
3667 }
3668
3669 static int iwl_mvm_mac_get_survey(struct ieee80211_hw *hw, int idx,
3670                                   struct survey_info *survey)
3671 {
3672         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3673         int ret;
3674
3675         memset(survey, 0, sizeof(*survey));
3676
3677         /* only support global statistics right now */
3678         if (idx != 0)
3679                 return -ENOENT;
3680
3681         if (!(mvm->fw->ucode_capa.capa[0] &
3682                         IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3683                 return -ENOENT;
3684
3685         mutex_lock(&mvm->mutex);
3686
3687         if (mvm->ucode_loaded) {
3688                 ret = iwl_mvm_request_statistics(mvm, false);
3689                 if (ret)
3690                         goto out;
3691         }
3692
3693         survey->filled = SURVEY_INFO_TIME |
3694                          SURVEY_INFO_TIME_RX |
3695                          SURVEY_INFO_TIME_TX |
3696                          SURVEY_INFO_TIME_SCAN;
3697         survey->time = mvm->accu_radio_stats.on_time_rf +
3698                        mvm->radio_stats.on_time_rf;
3699         do_div(survey->time, USEC_PER_MSEC);
3700
3701         survey->time_rx = mvm->accu_radio_stats.rx_time +
3702                           mvm->radio_stats.rx_time;
3703         do_div(survey->time_rx, USEC_PER_MSEC);
3704
3705         survey->time_tx = mvm->accu_radio_stats.tx_time +
3706                           mvm->radio_stats.tx_time;
3707         do_div(survey->time_tx, USEC_PER_MSEC);
3708
3709         survey->time_scan = mvm->accu_radio_stats.on_time_scan +
3710                             mvm->radio_stats.on_time_scan;
3711         do_div(survey->time_scan, USEC_PER_MSEC);
3712
3713  out:
3714         mutex_unlock(&mvm->mutex);
3715         return ret;
3716 }
3717
3718 static void iwl_mvm_mac_sta_statistics(struct ieee80211_hw *hw,
3719                                        struct ieee80211_vif *vif,
3720                                        struct ieee80211_sta *sta,
3721                                        struct station_info *sinfo)
3722 {
3723         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3724         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3725         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
3726
3727         if (!(mvm->fw->ucode_capa.capa[0] &
3728                                 IWL_UCODE_TLV_CAPA_RADIO_BEACON_STATS))
3729                 return;
3730
3731         /* if beacon filtering isn't on mac80211 does it anyway */
3732         if (!(vif->driver_flags & IEEE80211_VIF_BEACON_FILTER))
3733                 return;
3734
3735         if (!vif->bss_conf.assoc)
3736                 return;
3737
3738         mutex_lock(&mvm->mutex);
3739
3740         if (mvmvif->ap_sta_id != mvmsta->sta_id)
3741                 goto unlock;
3742
3743         if (iwl_mvm_request_statistics(mvm, false))
3744                 goto unlock;
3745
3746         sinfo->rx_beacon = mvmvif->beacon_stats.num_beacons +
3747                            mvmvif->beacon_stats.accu_num_beacons;
3748         sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_RX);
3749         if (mvmvif->beacon_stats.avg_signal) {
3750                 /* firmware only reports a value after RXing a few beacons */
3751                 sinfo->rx_beacon_signal_avg = mvmvif->beacon_stats.avg_signal;
3752                 sinfo->filled |= BIT(NL80211_STA_INFO_BEACON_SIGNAL_AVG);
3753         }
3754  unlock:
3755         mutex_unlock(&mvm->mutex);
3756 }
3757
3758 const struct ieee80211_ops iwl_mvm_hw_ops = {
3759         .tx = iwl_mvm_mac_tx,
3760         .ampdu_action = iwl_mvm_mac_ampdu_action,
3761         .start = iwl_mvm_mac_start,
3762         .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3763         .stop = iwl_mvm_mac_stop,
3764         .add_interface = iwl_mvm_mac_add_interface,
3765         .remove_interface = iwl_mvm_mac_remove_interface,
3766         .config = iwl_mvm_mac_config,
3767         .prepare_multicast = iwl_mvm_prepare_multicast,
3768         .configure_filter = iwl_mvm_configure_filter,
3769         .bss_info_changed = iwl_mvm_bss_info_changed,
3770         .hw_scan = iwl_mvm_mac_hw_scan,
3771         .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3772         .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3773         .sta_state = iwl_mvm_mac_sta_state,
3774         .sta_notify = iwl_mvm_mac_sta_notify,
3775         .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3776         .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3777         .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3778         .sta_rc_update = iwl_mvm_sta_rc_update,
3779         .conf_tx = iwl_mvm_mac_conf_tx,
3780         .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3781         .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3782         .flush = iwl_mvm_mac_flush,
3783         .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3784         .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3785         .set_key = iwl_mvm_mac_set_key,
3786         .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3787         .remain_on_channel = iwl_mvm_roc,
3788         .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3789         .add_chanctx = iwl_mvm_add_chanctx,
3790         .remove_chanctx = iwl_mvm_remove_chanctx,
3791         .change_chanctx = iwl_mvm_change_chanctx,
3792         .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3793         .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3794         .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3795
3796         .start_ap = iwl_mvm_start_ap_ibss,
3797         .stop_ap = iwl_mvm_stop_ap_ibss,
3798         .join_ibss = iwl_mvm_start_ap_ibss,
3799         .leave_ibss = iwl_mvm_stop_ap_ibss,
3800
3801         .set_tim = iwl_mvm_set_tim,
3802
3803         .channel_switch = iwl_mvm_channel_switch,
3804         .pre_channel_switch = iwl_mvm_pre_channel_switch,
3805         .post_channel_switch = iwl_mvm_post_channel_switch,
3806
3807         .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
3808         .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
3809         .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
3810
3811         CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3812
3813 #ifdef CONFIG_PM_SLEEP
3814         /* look at d3.c */
3815         .suspend = iwl_mvm_suspend,
3816         .resume = iwl_mvm_resume,
3817         .set_wakeup = iwl_mvm_set_wakeup,
3818         .set_rekey_data = iwl_mvm_set_rekey_data,
3819 #if IS_ENABLED(CONFIG_IPV6)
3820         .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3821 #endif
3822         .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3823 #endif
3824         .get_survey = iwl_mvm_mac_get_survey,
3825         .sta_statistics = iwl_mvm_mac_sta_statistics,
3826 };