Merge branches 'arm/rockchip', 'arm/exynos', 'arm/smmu', 'x86/vt-d', 'x86/amd', ...
[sfrench/cifs-2.6.git] / drivers / net / wireless / iwlwifi / mvm / mac80211.c
1 /******************************************************************************
2  *
3  * This file is provided under a dual BSD/GPLv2 license.  When using or
4  * redistributing this file, you may do so under either license.
5  *
6  * GPL LICENSE SUMMARY
7  *
8  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10  *
11  * This program is free software; you can redistribute it and/or modify
12  * it under the terms of version 2 of the GNU General Public License as
13  * published by the Free Software Foundation.
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33  *
34  * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35  * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36  * All rights reserved.
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39  * modification, are permitted provided that the following conditions
40  * are met:
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44  *  * Redistributions in binary form must reproduce the above copyright
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46  *    the documentation and/or other materials provided with the
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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,
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60  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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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 #include "iwl-nvm-parse.h"
90
91 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
92         {
93                 .max = 1,
94                 .types = BIT(NL80211_IFTYPE_STATION),
95         },
96         {
97                 .max = 1,
98                 .types = BIT(NL80211_IFTYPE_AP) |
99                         BIT(NL80211_IFTYPE_P2P_CLIENT) |
100                         BIT(NL80211_IFTYPE_P2P_GO),
101         },
102         {
103                 .max = 1,
104                 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
105         },
106 };
107
108 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
109         {
110                 .num_different_channels = 2,
111                 .max_interfaces = 3,
112                 .limits = iwl_mvm_limits,
113                 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
114         },
115 };
116
117 #ifdef CONFIG_PM_SLEEP
118 static const struct nl80211_wowlan_tcp_data_token_feature
119 iwl_mvm_wowlan_tcp_token_feature = {
120         .min_len = 0,
121         .max_len = 255,
122         .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
123 };
124
125 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
126         .tok = &iwl_mvm_wowlan_tcp_token_feature,
127         .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
128                             sizeof(struct ethhdr) -
129                             sizeof(struct iphdr) -
130                             sizeof(struct tcphdr),
131         .data_interval_max = 65535, /* __le16 in API */
132         .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
133                             sizeof(struct ethhdr) -
134                             sizeof(struct iphdr) -
135                             sizeof(struct tcphdr),
136         .seq = true,
137 };
138 #endif
139
140 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
141 /*
142  * Use the reserved field to indicate magic values.
143  * these values will only be used internally by the driver,
144  * and won't make it to the fw (reserved will be 0).
145  * BC_FILTER_MAGIC_IP - configure the val of this attribute to
146  *      be the vif's ip address. in case there is not a single
147  *      ip address (0, or more than 1), this attribute will
148  *      be skipped.
149  * BC_FILTER_MAGIC_MAC - set the val of this attribute to
150  *      the LSB bytes of the vif's mac address
151  */
152 enum {
153         BC_FILTER_MAGIC_NONE = 0,
154         BC_FILTER_MAGIC_IP,
155         BC_FILTER_MAGIC_MAC,
156 };
157
158 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
159         {
160                 /* arp */
161                 .discard = 0,
162                 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
163                 .attrs = {
164                         {
165                                 /* frame type - arp, hw type - ethernet */
166                                 .offset_type =
167                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
168                                 .offset = sizeof(rfc1042_header),
169                                 .val = cpu_to_be32(0x08060001),
170                                 .mask = cpu_to_be32(0xffffffff),
171                         },
172                         {
173                                 /* arp dest ip */
174                                 .offset_type =
175                                         BCAST_FILTER_OFFSET_PAYLOAD_START,
176                                 .offset = sizeof(rfc1042_header) + 2 +
177                                           sizeof(struct arphdr) +
178                                           ETH_ALEN + sizeof(__be32) +
179                                           ETH_ALEN,
180                                 .mask = cpu_to_be32(0xffffffff),
181                                 /* mark it as special field */
182                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
183                         },
184                 },
185         },
186         {
187                 /* dhcp offer bcast */
188                 .discard = 0,
189                 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
190                 .attrs = {
191                         {
192                                 /* udp dest port - 68 (bootp client)*/
193                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
194                                 .offset = offsetof(struct udphdr, dest),
195                                 .val = cpu_to_be32(0x00440000),
196                                 .mask = cpu_to_be32(0xffff0000),
197                         },
198                         {
199                                 /* dhcp - lsb bytes of client hw address */
200                                 .offset_type = BCAST_FILTER_OFFSET_IP_END,
201                                 .offset = 38,
202                                 .mask = cpu_to_be32(0xffffffff),
203                                 /* mark it as special field */
204                                 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
205                         },
206                 },
207         },
208         /* last filter must be empty */
209         {},
210 };
211 #endif
212
213 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
214 {
215         if (!iwl_mvm_is_d0i3_supported(mvm))
216                 return;
217
218         IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
219         spin_lock_bh(&mvm->refs_lock);
220         mvm->refs[ref_type]++;
221         spin_unlock_bh(&mvm->refs_lock);
222         iwl_trans_ref(mvm->trans);
223 }
224
225 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
226 {
227         if (!iwl_mvm_is_d0i3_supported(mvm))
228                 return;
229
230         IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
231         spin_lock_bh(&mvm->refs_lock);
232         WARN_ON(!mvm->refs[ref_type]--);
233         spin_unlock_bh(&mvm->refs_lock);
234         iwl_trans_unref(mvm->trans);
235 }
236
237 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
238                                      enum iwl_mvm_ref_type except_ref)
239 {
240         int i, j;
241
242         if (!iwl_mvm_is_d0i3_supported(mvm))
243                 return;
244
245         spin_lock_bh(&mvm->refs_lock);
246         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
247                 if (except_ref == i || !mvm->refs[i])
248                         continue;
249
250                 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
251                               i, mvm->refs[i]);
252                 for (j = 0; j < mvm->refs[i]; j++)
253                         iwl_trans_unref(mvm->trans);
254                 mvm->refs[i] = 0;
255         }
256         spin_unlock_bh(&mvm->refs_lock);
257 }
258
259 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
260 {
261         int i;
262         bool taken = false;
263
264         if (!iwl_mvm_is_d0i3_supported(mvm))
265                 return true;
266
267         spin_lock_bh(&mvm->refs_lock);
268         for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
269                 if (mvm->refs[i]) {
270                         taken = true;
271                         break;
272                 }
273         }
274         spin_unlock_bh(&mvm->refs_lock);
275
276         return taken;
277 }
278
279 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
280 {
281         iwl_mvm_ref(mvm, ref_type);
282
283         if (!wait_event_timeout(mvm->d0i3_exit_waitq,
284                                 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
285                                 HZ)) {
286                 WARN_ON_ONCE(1);
287                 iwl_mvm_unref(mvm, ref_type);
288                 return -EIO;
289         }
290
291         return 0;
292 }
293
294 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
295 {
296         int i;
297
298         memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
299         for (i = 0; i < NUM_PHY_CTX; i++) {
300                 mvm->phy_ctxts[i].id = i;
301                 mvm->phy_ctxts[i].ref = 0;
302         }
303 }
304
305 struct ieee80211_regdomain *iwl_mvm_get_regdomain(struct wiphy *wiphy,
306                                                   const char *alpha2,
307                                                   enum iwl_mcc_source src_id,
308                                                   bool *changed)
309 {
310         struct ieee80211_regdomain *regd = NULL;
311         struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
312         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
313         struct iwl_mcc_update_resp *resp;
314
315         IWL_DEBUG_LAR(mvm, "Getting regdomain data for %s from FW\n", alpha2);
316
317         lockdep_assert_held(&mvm->mutex);
318
319         resp = iwl_mvm_update_mcc(mvm, alpha2, src_id);
320         if (IS_ERR_OR_NULL(resp)) {
321                 IWL_DEBUG_LAR(mvm, "Could not get update from FW %d\n",
322                               PTR_RET(resp));
323                 goto out;
324         }
325
326         if (changed)
327                 *changed = (resp->status == MCC_RESP_NEW_CHAN_PROFILE);
328
329         regd = iwl_parse_nvm_mcc_info(mvm->trans->dev, mvm->cfg,
330                                       __le32_to_cpu(resp->n_channels),
331                                       resp->channels,
332                                       __le16_to_cpu(resp->mcc));
333         /* Store the return source id */
334         src_id = resp->source_id;
335         kfree(resp);
336         if (IS_ERR_OR_NULL(regd)) {
337                 IWL_DEBUG_LAR(mvm, "Could not get parse update from FW %d\n",
338                               PTR_RET(regd));
339                 goto out;
340         }
341
342         IWL_DEBUG_LAR(mvm, "setting alpha2 from FW to %s (0x%x, 0x%x) src=%d\n",
343                       regd->alpha2, regd->alpha2[0], regd->alpha2[1], src_id);
344         mvm->lar_regdom_set = true;
345         mvm->mcc_src = src_id;
346
347 out:
348         return regd;
349 }
350
351 void iwl_mvm_update_changed_regdom(struct iwl_mvm *mvm)
352 {
353         bool changed;
354         struct ieee80211_regdomain *regd;
355
356         if (!iwl_mvm_is_lar_supported(mvm))
357                 return;
358
359         regd = iwl_mvm_get_current_regdomain(mvm, &changed);
360         if (!IS_ERR_OR_NULL(regd)) {
361                 /* only update the regulatory core if changed */
362                 if (changed)
363                         regulatory_set_wiphy_regd(mvm->hw->wiphy, regd);
364
365                 kfree(regd);
366         }
367 }
368
369 struct ieee80211_regdomain *iwl_mvm_get_current_regdomain(struct iwl_mvm *mvm,
370                                                           bool *changed)
371 {
372         return iwl_mvm_get_regdomain(mvm->hw->wiphy, "ZZ",
373                                      iwl_mvm_is_wifi_mcc_supported(mvm) ?
374                                      MCC_SOURCE_GET_CURRENT :
375                                      MCC_SOURCE_OLD_FW, changed);
376 }
377
378 int iwl_mvm_init_fw_regd(struct iwl_mvm *mvm)
379 {
380         enum iwl_mcc_source used_src;
381         struct ieee80211_regdomain *regd;
382         int ret;
383         bool changed;
384         const struct ieee80211_regdomain *r =
385                         rtnl_dereference(mvm->hw->wiphy->regd);
386
387         if (!r)
388                 return -ENOENT;
389
390         /* save the last source in case we overwrite it below */
391         used_src = mvm->mcc_src;
392         if (iwl_mvm_is_wifi_mcc_supported(mvm)) {
393                 /* Notify the firmware we support wifi location updates */
394                 regd = iwl_mvm_get_current_regdomain(mvm, NULL);
395                 if (!IS_ERR_OR_NULL(regd))
396                         kfree(regd);
397         }
398
399         /* Now set our last stored MCC and source */
400         regd = iwl_mvm_get_regdomain(mvm->hw->wiphy, r->alpha2, used_src,
401                                      &changed);
402         if (IS_ERR_OR_NULL(regd))
403                 return -EIO;
404
405         /* update cfg80211 if the regdomain was changed */
406         if (changed)
407                 ret = regulatory_set_wiphy_regd_sync_rtnl(mvm->hw->wiphy, regd);
408         else
409                 ret = 0;
410
411         kfree(regd);
412         return ret;
413 }
414
415 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
416 {
417         struct ieee80211_hw *hw = mvm->hw;
418         int num_mac, ret, i;
419
420         /* Tell mac80211 our characteristics */
421         hw->flags = IEEE80211_HW_SIGNAL_DBM |
422                     IEEE80211_HW_SPECTRUM_MGMT |
423                     IEEE80211_HW_REPORTS_TX_ACK_STATUS |
424                     IEEE80211_HW_QUEUE_CONTROL |
425                     IEEE80211_HW_WANT_MONITOR_VIF |
426                     IEEE80211_HW_SUPPORTS_PS |
427                     IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
428                     IEEE80211_HW_AMPDU_AGGREGATION |
429                     IEEE80211_HW_TIMING_BEACON_ONLY |
430                     IEEE80211_HW_CONNECTION_MONITOR |
431                     IEEE80211_HW_CHANCTX_STA_CSA |
432                     IEEE80211_HW_SUPPORTS_CLONED_SKBS;
433
434         hw->queues = mvm->first_agg_queue;
435         hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
436         hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
437                                     IEEE80211_RADIOTAP_MCS_HAVE_STBC;
438         hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC |
439                 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
440         hw->rate_control_algorithm = "iwl-mvm-rs";
441         hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
442         hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
443
444         /*
445          * Enable 11w if advertised by firmware and software crypto
446          * is not enabled (as the firmware will interpret some mgmt
447          * packets, so enabling it with software crypto isn't safe)
448          */
449         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
450             !iwlwifi_mod_params.sw_crypto)
451                 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
452
453         hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
454         hw->wiphy->features |=
455                 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
456                 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
457
458         hw->sta_data_size = sizeof(struct iwl_mvm_sta);
459         hw->vif_data_size = sizeof(struct iwl_mvm_vif);
460         hw->chanctx_data_size = sizeof(u16);
461
462         hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
463                 BIT(NL80211_IFTYPE_P2P_CLIENT) |
464                 BIT(NL80211_IFTYPE_AP) |
465                 BIT(NL80211_IFTYPE_P2P_GO) |
466                 BIT(NL80211_IFTYPE_P2P_DEVICE) |
467                 BIT(NL80211_IFTYPE_ADHOC);
468
469         hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
470         hw->wiphy->regulatory_flags |= REGULATORY_ENABLE_RELAX_NO_IR;
471         if (iwl_mvm_is_lar_supported(mvm))
472                 hw->wiphy->regulatory_flags |= REGULATORY_WIPHY_SELF_MANAGED;
473         else
474                 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
475                                                REGULATORY_DISABLE_BEACON_HINTS;
476
477         if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
478                 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
479
480         hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
481
482         hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
483         hw->wiphy->n_iface_combinations =
484                 ARRAY_SIZE(iwl_mvm_iface_combinations);
485
486         hw->wiphy->max_remain_on_channel_duration = 10000;
487         hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
488         /* we can compensate an offset of up to 3 channels = 15 MHz */
489         hw->wiphy->max_adj_channel_rssi_comp = 3 * 5;
490
491         /* Extract MAC address */
492         memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
493         hw->wiphy->addresses = mvm->addresses;
494         hw->wiphy->n_addresses = 1;
495
496         /* Extract additional MAC addresses if available */
497         num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
498                 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
499
500         for (i = 1; i < num_mac; i++) {
501                 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
502                        ETH_ALEN);
503                 mvm->addresses[i].addr[5]++;
504                 hw->wiphy->n_addresses++;
505         }
506
507         iwl_mvm_reset_phy_ctxts(mvm);
508
509         hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
510
511         hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
512
513         if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
514                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
515                         &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
516         if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels) {
517                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
518                         &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
519
520                 if ((mvm->fw->ucode_capa.capa[0] &
521                      IWL_UCODE_TLV_CAPA_BEAMFORMER) &&
522                     (mvm->fw->ucode_capa.api[0] &
523                      IWL_UCODE_TLV_API_LQ_SS_PARAMS))
524                         hw->wiphy->bands[IEEE80211_BAND_5GHZ]->vht_cap.cap |=
525                                 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE;
526         }
527
528         hw->wiphy->hw_version = mvm->trans->hw_id;
529
530         if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
531                 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
532         else
533                 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
534
535         if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
536                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
537                 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
538                 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
539                 /* we create the 802.11 header and zero length SSID IE. */
540                 hw->wiphy->max_sched_scan_ie_len =
541                         SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
542         }
543
544         hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
545                                NL80211_FEATURE_LOW_PRIORITY_SCAN |
546                                NL80211_FEATURE_P2P_GO_OPPPS |
547                                NL80211_FEATURE_DYNAMIC_SMPS |
548                                NL80211_FEATURE_STATIC_SMPS |
549                                NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
550
551         if (mvm->fw->ucode_capa.capa[0] &
552             IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
553                 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
554         if (mvm->fw->ucode_capa.capa[0] &
555             IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
556                 hw->wiphy->features |= NL80211_FEATURE_QUIET;
557
558         if (mvm->fw->ucode_capa.capa[0] &
559             IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
560                 hw->wiphy->features |=
561                         NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
562
563         if (mvm->fw->ucode_capa.capa[0] &
564             IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
565                 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
566
567         mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
568
569         /* currently FW API supports only one optional cipher scheme */
570         if (mvm->fw->cs[0].cipher) {
571                 mvm->hw->n_cipher_schemes = 1;
572                 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
573         }
574
575 #ifdef CONFIG_PM_SLEEP
576         if (iwl_mvm_is_d0i3_supported(mvm) &&
577             device_can_wakeup(mvm->trans->dev)) {
578                 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
579                 hw->wiphy->wowlan = &mvm->wowlan;
580         }
581
582         if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
583             mvm->trans->ops->d3_suspend &&
584             mvm->trans->ops->d3_resume &&
585             device_can_wakeup(mvm->trans->dev)) {
586                 mvm->wowlan.flags |= WIPHY_WOWLAN_MAGIC_PKT |
587                                      WIPHY_WOWLAN_DISCONNECT |
588                                      WIPHY_WOWLAN_EAP_IDENTITY_REQ |
589                                      WIPHY_WOWLAN_RFKILL_RELEASE |
590                                      WIPHY_WOWLAN_NET_DETECT;
591                 if (!iwlwifi_mod_params.sw_crypto)
592                         mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
593                                              WIPHY_WOWLAN_GTK_REKEY_FAILURE |
594                                              WIPHY_WOWLAN_4WAY_HANDSHAKE;
595
596                 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
597                 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
598                 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
599                 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
600                 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
601                 hw->wiphy->wowlan = &mvm->wowlan;
602         }
603 #endif
604
605 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
606         /* assign default bcast filtering configuration */
607         mvm->bcast_filters = iwl_mvm_default_bcast_filters;
608 #endif
609
610         ret = iwl_mvm_leds_init(mvm);
611         if (ret)
612                 return ret;
613
614         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
615                 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
616                 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
617         }
618
619         if (mvm->fw->ucode_capa.capa[0] &
620             IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
621                 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
622                 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
623         }
624
625         ret = ieee80211_register_hw(mvm->hw);
626         if (ret)
627                 iwl_mvm_leds_exit(mvm);
628
629         return ret;
630 }
631
632 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
633                              struct ieee80211_sta *sta,
634                              struct sk_buff *skb)
635 {
636         struct iwl_mvm_sta *mvmsta;
637         bool defer = false;
638
639         /*
640          * double check the IN_D0I3 flag both before and after
641          * taking the spinlock, in order to prevent taking
642          * the spinlock when not needed.
643          */
644         if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
645                 return false;
646
647         spin_lock(&mvm->d0i3_tx_lock);
648         /*
649          * testing the flag again ensures the skb dequeue
650          * loop (on d0i3 exit) hasn't run yet.
651          */
652         if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
653                 goto out;
654
655         mvmsta = iwl_mvm_sta_from_mac80211(sta);
656         if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
657             mvmsta->sta_id != mvm->d0i3_ap_sta_id)
658                 goto out;
659
660         __skb_queue_tail(&mvm->d0i3_tx, skb);
661         ieee80211_stop_queues(mvm->hw);
662
663         /* trigger wakeup */
664         iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
665         iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
666
667         defer = true;
668 out:
669         spin_unlock(&mvm->d0i3_tx_lock);
670         return defer;
671 }
672
673 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
674                            struct ieee80211_tx_control *control,
675                            struct sk_buff *skb)
676 {
677         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
678         struct ieee80211_sta *sta = control->sta;
679         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
680         struct ieee80211_hdr *hdr = (void *)skb->data;
681
682         if (iwl_mvm_is_radio_killed(mvm)) {
683                 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
684                 goto drop;
685         }
686
687         if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
688             !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
689             !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
690                 goto drop;
691
692         /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
693         if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
694                      ieee80211_is_mgmt(hdr->frame_control) &&
695                      !ieee80211_is_deauth(hdr->frame_control) &&
696                      !ieee80211_is_disassoc(hdr->frame_control) &&
697                      !ieee80211_is_action(hdr->frame_control)))
698                 sta = NULL;
699
700         if (sta) {
701                 if (iwl_mvm_defer_tx(mvm, sta, skb))
702                         return;
703                 if (iwl_mvm_tx_skb(mvm, skb, sta))
704                         goto drop;
705                 return;
706         }
707
708         if (iwl_mvm_tx_skb_non_sta(mvm, skb))
709                 goto drop;
710         return;
711  drop:
712         ieee80211_free_txskb(hw, skb);
713 }
714
715 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
716 {
717         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
718                 return false;
719         return true;
720 }
721
722 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
723 {
724         if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
725                 return false;
726         if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
727                 return true;
728
729         /* enabled by default */
730         return true;
731 }
732
733 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
734                                     struct ieee80211_vif *vif,
735                                     enum ieee80211_ampdu_mlme_action action,
736                                     struct ieee80211_sta *sta, u16 tid,
737                                     u16 *ssn, u8 buf_size)
738 {
739         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
740         int ret;
741         bool tx_agg_ref = false;
742
743         IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
744                      sta->addr, tid, action);
745
746         if (!(mvm->nvm_data->sku_cap_11n_enable))
747                 return -EACCES;
748
749         /* return from D0i3 before starting a new Tx aggregation */
750         switch (action) {
751         case IEEE80211_AMPDU_TX_START:
752         case IEEE80211_AMPDU_TX_STOP_CONT:
753         case IEEE80211_AMPDU_TX_STOP_FLUSH:
754         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
755         case IEEE80211_AMPDU_TX_OPERATIONAL:
756                 /*
757                  * for tx start, wait synchronously until D0i3 exit to
758                  * get the correct sequence number for the tid.
759                  * additionally, some other ampdu actions use direct
760                  * target access, which is not handled automatically
761                  * by the trans layer (unlike commands), so wait for
762                  * d0i3 exit in these cases as well.
763                  */
764                 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
765                 if (ret)
766                         return ret;
767
768                 tx_agg_ref = true;
769                 break;
770         default:
771                 break;
772         }
773
774         mutex_lock(&mvm->mutex);
775
776         switch (action) {
777         case IEEE80211_AMPDU_RX_START:
778                 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
779                         ret = -EINVAL;
780                         break;
781                 }
782                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
783                 break;
784         case IEEE80211_AMPDU_RX_STOP:
785                 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
786                 break;
787         case IEEE80211_AMPDU_TX_START:
788                 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
789                         ret = -EINVAL;
790                         break;
791                 }
792                 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
793                 break;
794         case IEEE80211_AMPDU_TX_STOP_CONT:
795                 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
796                 break;
797         case IEEE80211_AMPDU_TX_STOP_FLUSH:
798         case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
799                 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
800                 break;
801         case IEEE80211_AMPDU_TX_OPERATIONAL:
802                 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
803                 break;
804         default:
805                 WARN_ON_ONCE(1);
806                 ret = -EINVAL;
807                 break;
808         }
809         mutex_unlock(&mvm->mutex);
810
811         /*
812          * If the tid is marked as started, we won't use it for offloaded
813          * traffic on the next D0i3 entry. It's safe to unref.
814          */
815         if (tx_agg_ref)
816                 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
817
818         return ret;
819 }
820
821 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
822                                      struct ieee80211_vif *vif)
823 {
824         struct iwl_mvm *mvm = data;
825         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
826
827         mvmvif->uploaded = false;
828         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
829
830         spin_lock_bh(&mvm->time_event_lock);
831         iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
832         spin_unlock_bh(&mvm->time_event_lock);
833
834         mvmvif->phy_ctxt = NULL;
835         memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
836 }
837
838 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
839                                      const void *data, size_t datalen)
840 {
841         const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
842         ssize_t bytes_read;
843         ssize_t bytes_read_trans;
844
845         if (offset < dump_ptrs->op_mode_len) {
846                 bytes_read = min_t(ssize_t, count,
847                                    dump_ptrs->op_mode_len - offset);
848                 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
849                        bytes_read);
850                 offset += bytes_read;
851                 count -= bytes_read;
852
853                 if (count == 0)
854                         return bytes_read;
855         } else {
856                 bytes_read = 0;
857         }
858
859         if (!dump_ptrs->trans_ptr)
860                 return bytes_read;
861
862         offset -= dump_ptrs->op_mode_len;
863         bytes_read_trans = min_t(ssize_t, count,
864                                  dump_ptrs->trans_ptr->len - offset);
865         memcpy(buffer + bytes_read,
866                (u8 *)dump_ptrs->trans_ptr->data + offset,
867                bytes_read_trans);
868
869         return bytes_read + bytes_read_trans;
870 }
871
872 static void iwl_mvm_free_coredump(const void *data)
873 {
874         const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
875
876         vfree(fw_error_dump->op_mode_ptr);
877         vfree(fw_error_dump->trans_ptr);
878         kfree(fw_error_dump);
879 }
880
881 static void iwl_mvm_dump_fifos(struct iwl_mvm *mvm,
882                                struct iwl_fw_error_dump_data **dump_data)
883 {
884         struct iwl_fw_error_dump_fifo *fifo_hdr;
885         u32 *fifo_data;
886         u32 fifo_len;
887         unsigned long flags;
888         int i, j;
889
890         if (!iwl_trans_grab_nic_access(mvm->trans, false, &flags))
891                 return;
892
893         /* Pull RXF data from all RXFs */
894         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.rxfifo_size); i++) {
895                 /*
896                  * Keep aside the additional offset that might be needed for
897                  * next RXF
898                  */
899                 u32 offset_diff = RXF_DIFF_FROM_PREV * i;
900
901                 fifo_hdr = (void *)(*dump_data)->data;
902                 fifo_data = (void *)fifo_hdr->data;
903                 fifo_len = mvm->shared_mem_cfg.rxfifo_size[i];
904
905                 /* No need to try to read the data if the length is 0 */
906                 if (fifo_len == 0)
907                         continue;
908
909                 /* Add a TLV for the RXF */
910                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
911                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
912
913                 fifo_hdr->fifo_num = cpu_to_le32(i);
914                 fifo_hdr->available_bytes =
915                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
916                                                         RXF_RD_D_SPACE +
917                                                         offset_diff));
918                 fifo_hdr->wr_ptr =
919                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
920                                                         RXF_RD_WR_PTR +
921                                                         offset_diff));
922                 fifo_hdr->rd_ptr =
923                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
924                                                         RXF_RD_RD_PTR +
925                                                         offset_diff));
926                 fifo_hdr->fence_ptr =
927                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
928                                                         RXF_RD_FENCE_PTR +
929                                                         offset_diff));
930                 fifo_hdr->fence_mode =
931                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
932                                                         RXF_SET_FENCE_MODE +
933                                                         offset_diff));
934
935                 /* Lock fence */
936                 iwl_trans_write_prph(mvm->trans,
937                                      RXF_SET_FENCE_MODE + offset_diff, 0x1);
938                 /* Set fence pointer to the same place like WR pointer */
939                 iwl_trans_write_prph(mvm->trans,
940                                      RXF_LD_WR2FENCE + offset_diff, 0x1);
941                 /* Set fence offset */
942                 iwl_trans_write_prph(mvm->trans,
943                                      RXF_LD_FENCE_OFFSET_ADDR + offset_diff,
944                                      0x0);
945
946                 /* Read FIFO */
947                 fifo_len /= sizeof(u32); /* Size in DWORDS */
948                 for (j = 0; j < fifo_len; j++)
949                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
950                                                          RXF_FIFO_RD_FENCE_INC +
951                                                          offset_diff);
952                 *dump_data = iwl_fw_error_next_data(*dump_data);
953         }
954
955         /* Pull TXF data from all TXFs */
956         for (i = 0; i < ARRAY_SIZE(mvm->shared_mem_cfg.txfifo_size); i++) {
957                 /* Mark the number of TXF we're pulling now */
958                 iwl_trans_write_prph(mvm->trans, TXF_LARC_NUM, i);
959
960                 fifo_hdr = (void *)(*dump_data)->data;
961                 fifo_data = (void *)fifo_hdr->data;
962                 fifo_len = mvm->shared_mem_cfg.txfifo_size[i];
963
964                 /* No need to try to read the data if the length is 0 */
965                 if (fifo_len == 0)
966                         continue;
967
968                 /* Add a TLV for the FIFO */
969                 (*dump_data)->type = cpu_to_le32(IWL_FW_ERROR_DUMP_TXF);
970                 (*dump_data)->len = cpu_to_le32(fifo_len + sizeof(*fifo_hdr));
971
972                 fifo_hdr->fifo_num = cpu_to_le32(i);
973                 fifo_hdr->available_bytes =
974                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
975                                                         TXF_FIFO_ITEM_CNT));
976                 fifo_hdr->wr_ptr =
977                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
978                                                         TXF_WR_PTR));
979                 fifo_hdr->rd_ptr =
980                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
981                                                         TXF_RD_PTR));
982                 fifo_hdr->fence_ptr =
983                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
984                                                         TXF_FENCE_PTR));
985                 fifo_hdr->fence_mode =
986                         cpu_to_le32(iwl_trans_read_prph(mvm->trans,
987                                                         TXF_LOCK_FENCE));
988
989                 /* Set the TXF_READ_MODIFY_ADDR to TXF_WR_PTR */
990                 iwl_trans_write_prph(mvm->trans, TXF_READ_MODIFY_ADDR,
991                                      TXF_WR_PTR);
992
993                 /* Dummy-read to advance the read pointer to the head */
994                 iwl_trans_read_prph(mvm->trans, TXF_READ_MODIFY_DATA);
995
996                 /* Read FIFO */
997                 fifo_len /= sizeof(u32); /* Size in DWORDS */
998                 for (j = 0; j < fifo_len; j++)
999                         fifo_data[j] = iwl_trans_read_prph(mvm->trans,
1000                                                           TXF_READ_MODIFY_DATA);
1001                 *dump_data = iwl_fw_error_next_data(*dump_data);
1002         }
1003
1004         iwl_trans_release_nic_access(mvm->trans, &flags);
1005 }
1006
1007 void iwl_mvm_free_fw_dump_desc(struct iwl_mvm *mvm)
1008 {
1009         if (mvm->fw_dump_desc == &iwl_mvm_dump_desc_assert ||
1010             !mvm->fw_dump_desc)
1011                 return;
1012
1013         kfree(mvm->fw_dump_desc);
1014         mvm->fw_dump_desc = NULL;
1015 }
1016
1017 #define IWL8260_ICCM_OFFSET             0x44000 /* Only for B-step */
1018 #define IWL8260_ICCM_LEN                0xC000 /* Only for B-step */
1019
1020 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
1021 {
1022         struct iwl_fw_error_dump_file *dump_file;
1023         struct iwl_fw_error_dump_data *dump_data;
1024         struct iwl_fw_error_dump_info *dump_info;
1025         struct iwl_fw_error_dump_mem *dump_mem;
1026         struct iwl_fw_error_dump_trigger_desc *dump_trig;
1027         struct iwl_mvm_dump_ptrs *fw_error_dump;
1028         u32 sram_len, sram_ofs;
1029         u32 file_len, fifo_data_len = 0;
1030         u32 smem_len = mvm->cfg->smem_len;
1031         u32 sram2_len = mvm->cfg->dccm2_len;
1032
1033         lockdep_assert_held(&mvm->mutex);
1034
1035         fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
1036         if (!fw_error_dump)
1037                 return;
1038
1039         /* SRAM - include stack CCM if driver knows the values for it */
1040         if (!mvm->cfg->dccm_offset || !mvm->cfg->dccm_len) {
1041                 const struct fw_img *img;
1042
1043                 img = &mvm->fw->img[mvm->cur_ucode];
1044                 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
1045                 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
1046         } else {
1047                 sram_ofs = mvm->cfg->dccm_offset;
1048                 sram_len = mvm->cfg->dccm_len;
1049         }
1050
1051         /* reading RXF/TXF sizes */
1052         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status)) {
1053                 struct iwl_mvm_shared_mem_cfg *mem_cfg = &mvm->shared_mem_cfg;
1054                 int i;
1055
1056                 fifo_data_len = 0;
1057
1058                 /* Count RXF size */
1059                 for (i = 0; i < ARRAY_SIZE(mem_cfg->rxfifo_size); i++) {
1060                         if (!mem_cfg->rxfifo_size[i])
1061                                 continue;
1062
1063                         /* Add header info */
1064                         fifo_data_len += mem_cfg->rxfifo_size[i] +
1065                                          sizeof(*dump_data) +
1066                                          sizeof(struct iwl_fw_error_dump_fifo);
1067                 }
1068
1069                 for (i = 0; i < ARRAY_SIZE(mem_cfg->txfifo_size); i++) {
1070                         if (!mem_cfg->txfifo_size[i])
1071                                 continue;
1072
1073                         /* Add header info */
1074                         fifo_data_len += mem_cfg->txfifo_size[i] +
1075                                          sizeof(*dump_data) +
1076                                          sizeof(struct iwl_fw_error_dump_fifo);
1077                 }
1078         }
1079
1080         file_len = sizeof(*dump_file) +
1081                    sizeof(*dump_data) * 2 +
1082                    sram_len + sizeof(*dump_mem) +
1083                    fifo_data_len +
1084                    sizeof(*dump_info);
1085
1086         /*
1087          * In 8000 HW family B-step include the ICCM (which resides separately)
1088          */
1089         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1090             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP)
1091                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) +
1092                             IWL8260_ICCM_LEN;
1093
1094         if (mvm->fw_dump_desc)
1095                 file_len += sizeof(*dump_data) + sizeof(*dump_trig) +
1096                             mvm->fw_dump_desc->len;
1097
1098         /* Make room for the SMEM, if it exists */
1099         if (smem_len)
1100                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + smem_len;
1101
1102         /* Make room for the secondary SRAM, if it exists */
1103         if (sram2_len)
1104                 file_len += sizeof(*dump_data) + sizeof(*dump_mem) + sram2_len;
1105
1106         dump_file = vzalloc(file_len);
1107         if (!dump_file) {
1108                 kfree(fw_error_dump);
1109                 iwl_mvm_free_fw_dump_desc(mvm);
1110                 return;
1111         }
1112
1113         fw_error_dump->op_mode_ptr = dump_file;
1114
1115         dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
1116         dump_data = (void *)dump_file->data;
1117
1118         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
1119         dump_data->len = cpu_to_le32(sizeof(*dump_info));
1120         dump_info = (void *) dump_data->data;
1121         dump_info->device_family =
1122                 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
1123                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
1124                         cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
1125         dump_info->hw_step = cpu_to_le32(CSR_HW_REV_STEP(mvm->trans->hw_rev));
1126         memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
1127                sizeof(dump_info->fw_human_readable));
1128         strncpy(dump_info->dev_human_readable, mvm->cfg->name,
1129                 sizeof(dump_info->dev_human_readable));
1130         strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
1131                 sizeof(dump_info->bus_human_readable));
1132
1133         dump_data = iwl_fw_error_next_data(dump_data);
1134         /* We only dump the FIFOs if the FW is in error state */
1135         if (test_bit(STATUS_FW_ERROR, &mvm->trans->status))
1136                 iwl_mvm_dump_fifos(mvm, &dump_data);
1137
1138         if (mvm->fw_dump_desc) {
1139                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_ERROR_INFO);
1140                 dump_data->len = cpu_to_le32(sizeof(*dump_trig) +
1141                                              mvm->fw_dump_desc->len);
1142                 dump_trig = (void *)dump_data->data;
1143                 memcpy(dump_trig, &mvm->fw_dump_desc->trig_desc,
1144                        sizeof(*dump_trig) + mvm->fw_dump_desc->len);
1145
1146                 /* now we can free this copy */
1147                 iwl_mvm_free_fw_dump_desc(mvm);
1148                 dump_data = iwl_fw_error_next_data(dump_data);
1149         }
1150
1151         dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1152         dump_data->len = cpu_to_le32(sram_len + sizeof(*dump_mem));
1153         dump_mem = (void *)dump_data->data;
1154         dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1155         dump_mem->offset = cpu_to_le32(sram_ofs);
1156         iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_mem->data,
1157                                  sram_len);
1158
1159         if (smem_len) {
1160                 dump_data = iwl_fw_error_next_data(dump_data);
1161                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1162                 dump_data->len = cpu_to_le32(smem_len + sizeof(*dump_mem));
1163                 dump_mem = (void *)dump_data->data;
1164                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SMEM);
1165                 dump_mem->offset = cpu_to_le32(mvm->cfg->smem_offset);
1166                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->smem_offset,
1167                                          dump_mem->data, smem_len);
1168         }
1169
1170         if (sram2_len) {
1171                 dump_data = iwl_fw_error_next_data(dump_data);
1172                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1173                 dump_data->len = cpu_to_le32(sram2_len + sizeof(*dump_mem));
1174                 dump_mem = (void *)dump_data->data;
1175                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1176                 dump_mem->offset = cpu_to_le32(mvm->cfg->dccm2_offset);
1177                 iwl_trans_read_mem_bytes(mvm->trans, mvm->cfg->dccm2_offset,
1178                                          dump_mem->data, sram2_len);
1179         }
1180
1181         if (mvm->cfg->device_family == IWL_DEVICE_FAMILY_8000 &&
1182             CSR_HW_REV_STEP(mvm->trans->hw_rev) == SILICON_B_STEP) {
1183                 dump_data = iwl_fw_error_next_data(dump_data);
1184                 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM);
1185                 dump_data->len = cpu_to_le32(IWL8260_ICCM_LEN +
1186                                              sizeof(*dump_mem));
1187                 dump_mem = (void *)dump_data->data;
1188                 dump_mem->type = cpu_to_le32(IWL_FW_ERROR_DUMP_MEM_SRAM);
1189                 dump_mem->offset = cpu_to_le32(IWL8260_ICCM_OFFSET);
1190                 iwl_trans_read_mem_bytes(mvm->trans, IWL8260_ICCM_OFFSET,
1191                                          dump_mem->data, IWL8260_ICCM_LEN);
1192         }
1193
1194         fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
1195         fw_error_dump->op_mode_len = file_len;
1196         if (fw_error_dump->trans_ptr)
1197                 file_len += fw_error_dump->trans_ptr->len;
1198         dump_file->file_len = cpu_to_le32(file_len);
1199
1200         dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
1201                       GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
1202
1203         clear_bit(IWL_MVM_STATUS_DUMPING_FW_LOG, &mvm->status);
1204 }
1205
1206 struct iwl_mvm_dump_desc iwl_mvm_dump_desc_assert = {
1207         .trig_desc = {
1208                 .type = cpu_to_le32(FW_DBG_TRIGGER_FW_ASSERT),
1209         },
1210 };
1211
1212 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
1213 {
1214         /* clear the D3 reconfig, we only need it to avoid dumping a
1215          * firmware coredump on reconfiguration, we shouldn't do that
1216          * on D3->D0 transition
1217          */
1218         if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status)) {
1219                 mvm->fw_dump_desc = &iwl_mvm_dump_desc_assert;
1220                 iwl_mvm_fw_error_dump(mvm);
1221         }
1222
1223         /* cleanup all stale references (scan, roc), but keep the
1224          * ucode_down ref until reconfig is complete
1225          */
1226         iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
1227
1228         iwl_trans_stop_device(mvm->trans);
1229
1230         mvm->scan_status = IWL_MVM_SCAN_NONE;
1231         mvm->ps_disabled = false;
1232         mvm->calibrating = false;
1233
1234         /* just in case one was running */
1235         ieee80211_remain_on_channel_expired(mvm->hw);
1236
1237         ieee80211_iterate_active_interfaces_atomic(
1238                 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
1239                 iwl_mvm_cleanup_iterator, mvm);
1240
1241         mvm->p2p_device_vif = NULL;
1242         mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1243
1244         iwl_mvm_reset_phy_ctxts(mvm);
1245         memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
1246         memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
1247         memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
1248         memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
1249         memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
1250         memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
1251         memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
1252         memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
1253         memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
1254
1255         ieee80211_wake_queues(mvm->hw);
1256
1257         /* clear any stale d0i3 state */
1258         clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
1259
1260         mvm->vif_count = 0;
1261         mvm->rx_ba_sessions = 0;
1262         mvm->fw_dbg_conf = FW_DBG_INVALID;
1263
1264         /* keep statistics ticking */
1265         iwl_mvm_accu_radio_stats(mvm);
1266 }
1267
1268 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
1269 {
1270         int ret;
1271
1272         lockdep_assert_held(&mvm->mutex);
1273
1274         /* Clean up some internal and mac80211 state on restart */
1275         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1276                 iwl_mvm_restart_cleanup(mvm);
1277
1278         ret = iwl_mvm_up(mvm);
1279
1280         if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1281                 /* Something went wrong - we need to finish some cleanup
1282                  * that normally iwl_mvm_mac_restart_complete() below
1283                  * would do.
1284                  */
1285                 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1286                 iwl_mvm_d0i3_enable_tx(mvm, NULL);
1287         }
1288
1289         return ret;
1290 }
1291
1292 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
1293 {
1294         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1295         int ret;
1296
1297         /* Some hw restart cleanups must not hold the mutex */
1298         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
1299                 /*
1300                  * Make sure we are out of d0i3. This is needed
1301                  * to make sure the reference accounting is correct
1302                  * (and there is no stale d0i3_exit_work).
1303                  */
1304                 wait_event_timeout(mvm->d0i3_exit_waitq,
1305                                    !test_bit(IWL_MVM_STATUS_IN_D0I3,
1306                                              &mvm->status),
1307                                    HZ);
1308         }
1309
1310         mutex_lock(&mvm->mutex);
1311         ret = __iwl_mvm_mac_start(mvm);
1312         mutex_unlock(&mvm->mutex);
1313
1314         return ret;
1315 }
1316
1317 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
1318 {
1319         int ret;
1320
1321         mutex_lock(&mvm->mutex);
1322
1323         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1324         iwl_mvm_d0i3_enable_tx(mvm, NULL);
1325         ret = iwl_mvm_update_quotas(mvm, true, NULL);
1326         if (ret)
1327                 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
1328                         ret);
1329
1330         /* allow transport/FW low power modes */
1331         iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
1332
1333         /*
1334          * If we have TDLS peers, remove them. We don't know the last seqno/PN
1335          * of packets the FW sent out, so we must reconnect.
1336          */
1337         iwl_mvm_teardown_tdls_peers(mvm);
1338
1339         mutex_unlock(&mvm->mutex);
1340 }
1341
1342 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
1343 {
1344         bool exit_now;
1345
1346         if (!iwl_mvm_is_d0i3_supported(mvm))
1347                 return;
1348
1349         mutex_lock(&mvm->d0i3_suspend_mutex);
1350         __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
1351         exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
1352                                         &mvm->d0i3_suspend_flags);
1353         mutex_unlock(&mvm->d0i3_suspend_mutex);
1354
1355         if (exit_now) {
1356                 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
1357                 _iwl_mvm_exit_d0i3(mvm);
1358         }
1359
1360         if (mvm->trans->d0i3_mode == IWL_D0I3_MODE_ON_SUSPEND)
1361                 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
1362                                         !test_bit(IWL_MVM_STATUS_IN_D0I3,
1363                                                   &mvm->status),
1364                                         HZ))
1365                         WARN_ONCE(1, "D0i3 exit on resume timed out\n");
1366 }
1367
1368 static void
1369 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
1370                               enum ieee80211_reconfig_type reconfig_type)
1371 {
1372         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1373
1374         switch (reconfig_type) {
1375         case IEEE80211_RECONFIG_TYPE_RESTART:
1376                 iwl_mvm_restart_complete(mvm);
1377                 break;
1378         case IEEE80211_RECONFIG_TYPE_SUSPEND:
1379                 iwl_mvm_resume_complete(mvm);
1380                 break;
1381         }
1382 }
1383
1384 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1385 {
1386         lockdep_assert_held(&mvm->mutex);
1387
1388         /* firmware counters are obviously reset now, but we shouldn't
1389          * partially track so also clear the fw_reset_accu counters.
1390          */
1391         memset(&mvm->accu_radio_stats, 0, sizeof(mvm->accu_radio_stats));
1392
1393         /*
1394          * Disallow low power states when the FW is down by taking
1395          * the UCODE_DOWN ref. in case of ongoing hw restart the
1396          * ref is already taken, so don't take it again.
1397          */
1398         if (!test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1399                 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1400
1401         /* async_handlers_wk is now blocked */
1402
1403         /*
1404          * The work item could be running or queued if the
1405          * ROC time event stops just as we get here.
1406          */
1407         cancel_work_sync(&mvm->roc_done_wk);
1408
1409         iwl_trans_stop_device(mvm->trans);
1410
1411         iwl_mvm_async_handlers_purge(mvm);
1412         /* async_handlers_list is empty and will stay empty: HW is stopped */
1413
1414         /* the fw is stopped, the aux sta is dead: clean up driver state */
1415         iwl_mvm_del_aux_sta(mvm);
1416
1417         /*
1418          * Clear IN_HW_RESTART flag when stopping the hw (as restart_complete()
1419          * won't be called in this case).
1420          */
1421         clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
1422
1423         /* We shouldn't have any UIDs still set.  Loop over all the UIDs to
1424          * make sure there's nothing left there and warn if any is found.
1425          */
1426         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
1427                 int i;
1428
1429                 for (i = 0; i < IWL_MVM_MAX_SIMULTANEOUS_SCANS; i++) {
1430                         if (WARN_ONCE(mvm->scan_uid[i],
1431                                       "UMAC scan UID %d was not cleaned\n",
1432                                       mvm->scan_uid[i]))
1433                                 mvm->scan_uid[i] = 0;
1434                 }
1435         }
1436
1437         mvm->ucode_loaded = false;
1438 }
1439
1440 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1441 {
1442         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1443
1444         flush_work(&mvm->d0i3_exit_work);
1445         flush_work(&mvm->async_handlers_wk);
1446         cancel_delayed_work_sync(&mvm->fw_dump_wk);
1447         iwl_mvm_free_fw_dump_desc(mvm);
1448
1449         mutex_lock(&mvm->mutex);
1450         __iwl_mvm_mac_stop(mvm);
1451         mutex_unlock(&mvm->mutex);
1452
1453         /*
1454          * The worker might have been waiting for the mutex, let it run and
1455          * discover that its list is now empty.
1456          */
1457         cancel_work_sync(&mvm->async_handlers_wk);
1458 }
1459
1460 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1461 {
1462         u16 i;
1463
1464         lockdep_assert_held(&mvm->mutex);
1465
1466         for (i = 0; i < NUM_PHY_CTX; i++)
1467                 if (!mvm->phy_ctxts[i].ref)
1468                         return &mvm->phy_ctxts[i];
1469
1470         IWL_ERR(mvm, "No available PHY context\n");
1471         return NULL;
1472 }
1473
1474 static int iwl_mvm_set_tx_power_old(struct iwl_mvm *mvm,
1475                                     struct ieee80211_vif *vif, s8 tx_power)
1476 {
1477         /* FW is in charge of regulatory enforcement */
1478         struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1479                 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1480                 .pwr_restriction = cpu_to_le16(tx_power),
1481         };
1482
1483         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1484                                     sizeof(reduce_txpwr_cmd),
1485                                     &reduce_txpwr_cmd);
1486 }
1487
1488 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1489                                 s16 tx_power)
1490 {
1491         struct iwl_dev_tx_power_cmd cmd = {
1492                 .set_mode = 0,
1493                 .mac_context_id =
1494                         cpu_to_le32(iwl_mvm_vif_from_mac80211(vif)->id),
1495                 .pwr_restriction = cpu_to_le16(8 * tx_power),
1496         };
1497
1498         if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_TX_POWER_DEV))
1499                 return iwl_mvm_set_tx_power_old(mvm, vif, tx_power);
1500
1501         if (tx_power == IWL_DEFAULT_MAX_TX_POWER)
1502                 cmd.pwr_restriction = cpu_to_le16(IWL_DEV_MAX_TX_POWER);
1503
1504         return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1505                                     sizeof(cmd), &cmd);
1506 }
1507
1508 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1509                                      struct ieee80211_vif *vif)
1510 {
1511         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1512         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1513         int ret;
1514
1515         mvmvif->mvm = mvm;
1516
1517         /*
1518          * make sure D0i3 exit is completed, otherwise a target access
1519          * during tx queue configuration could be done when still in
1520          * D0i3 state.
1521          */
1522         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1523         if (ret)
1524                 return ret;
1525
1526         /*
1527          * Not much to do here. The stack will not allow interface
1528          * types or combinations that we didn't advertise, so we
1529          * don't really have to check the types.
1530          */
1531
1532         mutex_lock(&mvm->mutex);
1533
1534         /* make sure that beacon statistics don't go backwards with FW reset */
1535         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
1536                 mvmvif->beacon_stats.accu_num_beacons +=
1537                         mvmvif->beacon_stats.num_beacons;
1538
1539         /* Allocate resources for the MAC context, and add it to the fw  */
1540         ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1541         if (ret)
1542                 goto out_unlock;
1543
1544         /* Counting number of interfaces is needed for legacy PM */
1545         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1546                 mvm->vif_count++;
1547
1548         /*
1549          * The AP binding flow can be done only after the beacon
1550          * template is configured (which happens only in the mac80211
1551          * start_ap() flow), and adding the broadcast station can happen
1552          * only after the binding.
1553          * In addition, since modifying the MAC before adding a bcast
1554          * station is not allowed by the FW, delay the adding of MAC context to
1555          * the point where we can also add the bcast station.
1556          * In short: there's not much we can do at this point, other than
1557          * allocating resources :)
1558          */
1559         if (vif->type == NL80211_IFTYPE_AP ||
1560             vif->type == NL80211_IFTYPE_ADHOC) {
1561                 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1562                 if (ret) {
1563                         IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1564                         goto out_release;
1565                 }
1566
1567                 iwl_mvm_vif_dbgfs_register(mvm, vif);
1568                 goto out_unlock;
1569         }
1570
1571         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1572         if (ret)
1573                 goto out_release;
1574
1575         ret = iwl_mvm_power_update_mac(mvm);
1576         if (ret)
1577                 goto out_remove_mac;
1578
1579         /* beacon filtering */
1580         ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1581         if (ret)
1582                 goto out_remove_mac;
1583
1584         if (!mvm->bf_allowed_vif &&
1585             vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1586                 mvm->bf_allowed_vif = mvmvif;
1587                 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1588                                      IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1589         }
1590
1591         /*
1592          * P2P_DEVICE interface does not have a channel context assigned to it,
1593          * so a dedicated PHY context is allocated to it and the corresponding
1594          * MAC context is bound to it at this stage.
1595          */
1596         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1597
1598                 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1599                 if (!mvmvif->phy_ctxt) {
1600                         ret = -ENOSPC;
1601                         goto out_free_bf;
1602                 }
1603
1604                 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1605                 ret = iwl_mvm_binding_add_vif(mvm, vif);
1606                 if (ret)
1607                         goto out_unref_phy;
1608
1609                 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1610                 if (ret)
1611                         goto out_unbind;
1612
1613                 /* Save a pointer to p2p device vif, so it can later be used to
1614                  * update the p2p device MAC when a GO is started/stopped */
1615                 mvm->p2p_device_vif = vif;
1616         }
1617
1618         iwl_mvm_vif_dbgfs_register(mvm, vif);
1619         goto out_unlock;
1620
1621  out_unbind:
1622         iwl_mvm_binding_remove_vif(mvm, vif);
1623  out_unref_phy:
1624         iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1625  out_free_bf:
1626         if (mvm->bf_allowed_vif == mvmvif) {
1627                 mvm->bf_allowed_vif = NULL;
1628                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1629                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1630         }
1631  out_remove_mac:
1632         mvmvif->phy_ctxt = NULL;
1633         iwl_mvm_mac_ctxt_remove(mvm, vif);
1634  out_release:
1635         if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1636                 mvm->vif_count--;
1637
1638         iwl_mvm_mac_ctxt_release(mvm, vif);
1639  out_unlock:
1640         mutex_unlock(&mvm->mutex);
1641
1642         iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1643
1644         return ret;
1645 }
1646
1647 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1648                                         struct ieee80211_vif *vif)
1649 {
1650         u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1651
1652         if (tfd_msk) {
1653                 /*
1654                  * mac80211 first removes all the stations of the vif and
1655                  * then removes the vif. When it removes a station it also
1656                  * flushes the AMPDU session. So by now, all the AMPDU sessions
1657                  * of all the stations of this vif are closed, and the queues
1658                  * of these AMPDU sessions are properly closed.
1659                  * We still need to take care of the shared queues of the vif.
1660                  * Flush them here.
1661                  */
1662                 mutex_lock(&mvm->mutex);
1663                 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1664                 mutex_unlock(&mvm->mutex);
1665
1666                 /*
1667                  * There are transports that buffer a few frames in the host.
1668                  * For these, the flush above isn't enough since while we were
1669                  * flushing, the transport might have sent more frames to the
1670                  * device. To solve this, wait here until the transport is
1671                  * empty. Technically, this could have replaced the flush
1672                  * above, but flush is much faster than draining. So flush
1673                  * first, and drain to make sure we have no frames in the
1674                  * transport anymore.
1675                  * If a station still had frames on the shared queues, it is
1676                  * already marked as draining, so to complete the draining, we
1677                  * just need to wait until the transport is empty.
1678                  */
1679                 iwl_trans_wait_tx_queue_empty(mvm->trans, tfd_msk);
1680         }
1681
1682         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1683                 /*
1684                  * Flush the ROC worker which will flush the OFFCHANNEL queue.
1685                  * We assume here that all the packets sent to the OFFCHANNEL
1686                  * queue are sent in ROC session.
1687                  */
1688                 flush_work(&mvm->roc_done_wk);
1689         } else {
1690                 /*
1691                  * By now, all the AC queues are empty. The AGG queues are
1692                  * empty too. We already got all the Tx responses for all the
1693                  * packets in the queues. The drain work can have been
1694                  * triggered. Flush it.
1695                  */
1696                 flush_work(&mvm->sta_drained_wk);
1697         }
1698 }
1699
1700 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1701                                          struct ieee80211_vif *vif)
1702 {
1703         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1704         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1705
1706         iwl_mvm_prepare_mac_removal(mvm, vif);
1707
1708         mutex_lock(&mvm->mutex);
1709
1710         if (mvm->bf_allowed_vif == mvmvif) {
1711                 mvm->bf_allowed_vif = NULL;
1712                 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1713                                        IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1714         }
1715
1716         iwl_mvm_vif_dbgfs_clean(mvm, vif);
1717
1718         /*
1719          * For AP/GO interface, the tear down of the resources allocated to the
1720          * interface is be handled as part of the stop_ap flow.
1721          */
1722         if (vif->type == NL80211_IFTYPE_AP ||
1723             vif->type == NL80211_IFTYPE_ADHOC) {
1724 #ifdef CONFIG_NL80211_TESTMODE
1725                 if (vif == mvm->noa_vif) {
1726                         mvm->noa_vif = NULL;
1727                         mvm->noa_duration = 0;
1728                 }
1729 #endif
1730                 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1731                 goto out_release;
1732         }
1733
1734         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1735                 mvm->p2p_device_vif = NULL;
1736                 iwl_mvm_rm_bcast_sta(mvm, vif);
1737                 iwl_mvm_binding_remove_vif(mvm, vif);
1738                 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1739                 mvmvif->phy_ctxt = NULL;
1740         }
1741
1742         if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1743                 mvm->vif_count--;
1744
1745         iwl_mvm_power_update_mac(mvm);
1746         iwl_mvm_mac_ctxt_remove(mvm, vif);
1747
1748 out_release:
1749         iwl_mvm_mac_ctxt_release(mvm, vif);
1750         mutex_unlock(&mvm->mutex);
1751 }
1752
1753 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1754 {
1755         return 0;
1756 }
1757
1758 struct iwl_mvm_mc_iter_data {
1759         struct iwl_mvm *mvm;
1760         int port_id;
1761 };
1762
1763 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1764                                       struct ieee80211_vif *vif)
1765 {
1766         struct iwl_mvm_mc_iter_data *data = _data;
1767         struct iwl_mvm *mvm = data->mvm;
1768         struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1769         int ret, len;
1770
1771         /* if we don't have free ports, mcast frames will be dropped */
1772         if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1773                 return;
1774
1775         if (vif->type != NL80211_IFTYPE_STATION ||
1776             !vif->bss_conf.assoc)
1777                 return;
1778
1779         cmd->port_id = data->port_id++;
1780         memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1781         len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1782
1783         ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1784         if (ret)
1785                 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1786 }
1787
1788 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1789 {
1790         struct iwl_mvm_mc_iter_data iter_data = {
1791                 .mvm = mvm,
1792         };
1793
1794         lockdep_assert_held(&mvm->mutex);
1795
1796         if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1797                 return;
1798
1799         ieee80211_iterate_active_interfaces_atomic(
1800                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1801                 iwl_mvm_mc_iface_iterator, &iter_data);
1802 }
1803
1804 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1805                                      struct netdev_hw_addr_list *mc_list)
1806 {
1807         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1808         struct iwl_mcast_filter_cmd *cmd;
1809         struct netdev_hw_addr *addr;
1810         int addr_count;
1811         bool pass_all;
1812         int len;
1813
1814         addr_count = netdev_hw_addr_list_count(mc_list);
1815         pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1816                    IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1817         if (pass_all)
1818                 addr_count = 0;
1819
1820         len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1821         cmd = kzalloc(len, GFP_ATOMIC);
1822         if (!cmd)
1823                 return 0;
1824
1825         if (pass_all) {
1826                 cmd->pass_all = 1;
1827                 return (u64)(unsigned long)cmd;
1828         }
1829
1830         netdev_hw_addr_list_for_each(addr, mc_list) {
1831                 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1832                                    cmd->count, addr->addr);
1833                 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1834                        addr->addr, ETH_ALEN);
1835                 cmd->count++;
1836         }
1837
1838         return (u64)(unsigned long)cmd;
1839 }
1840
1841 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1842                                      unsigned int changed_flags,
1843                                      unsigned int *total_flags,
1844                                      u64 multicast)
1845 {
1846         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1847         struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1848
1849         mutex_lock(&mvm->mutex);
1850
1851         /* replace previous configuration */
1852         kfree(mvm->mcast_filter_cmd);
1853         mvm->mcast_filter_cmd = cmd;
1854
1855         if (!cmd)
1856                 goto out;
1857
1858         iwl_mvm_recalc_multicast(mvm);
1859 out:
1860         mutex_unlock(&mvm->mutex);
1861         *total_flags = 0;
1862 }
1863
1864 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1865 struct iwl_bcast_iter_data {
1866         struct iwl_mvm *mvm;
1867         struct iwl_bcast_filter_cmd *cmd;
1868         u8 current_filter;
1869 };
1870
1871 static void
1872 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1873                          const struct iwl_fw_bcast_filter *in_filter,
1874                          struct iwl_fw_bcast_filter *out_filter)
1875 {
1876         struct iwl_fw_bcast_filter_attr *attr;
1877         int i;
1878
1879         memcpy(out_filter, in_filter, sizeof(*out_filter));
1880
1881         for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1882                 attr = &out_filter->attrs[i];
1883
1884                 if (!attr->mask)
1885                         break;
1886
1887                 switch (attr->reserved1) {
1888                 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1889                         if (vif->bss_conf.arp_addr_cnt != 1) {
1890                                 attr->mask = 0;
1891                                 continue;
1892                         }
1893
1894                         attr->val = vif->bss_conf.arp_addr_list[0];
1895                         break;
1896                 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1897                         attr->val = *(__be32 *)&vif->addr[2];
1898                         break;
1899                 default:
1900                         break;
1901                 }
1902                 attr->reserved1 = 0;
1903                 out_filter->num_attrs++;
1904         }
1905 }
1906
1907 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1908                                           struct ieee80211_vif *vif)
1909 {
1910         struct iwl_bcast_iter_data *data = _data;
1911         struct iwl_mvm *mvm = data->mvm;
1912         struct iwl_bcast_filter_cmd *cmd = data->cmd;
1913         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1914         struct iwl_fw_bcast_mac *bcast_mac;
1915         int i;
1916
1917         if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1918                 return;
1919
1920         bcast_mac = &cmd->macs[mvmvif->id];
1921
1922         /*
1923          * enable filtering only for associated stations, but not for P2P
1924          * Clients
1925          */
1926         if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1927             !vif->bss_conf.assoc)
1928                 return;
1929
1930         bcast_mac->default_discard = 1;
1931
1932         /* copy all configured filters */
1933         for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1934                 /*
1935                  * Make sure we don't exceed our filters limit.
1936                  * if there is still a valid filter to be configured,
1937                  * be on the safe side and just allow bcast for this mac.
1938                  */
1939                 if (WARN_ON_ONCE(data->current_filter >=
1940                                  ARRAY_SIZE(cmd->filters))) {
1941                         bcast_mac->default_discard = 0;
1942                         bcast_mac->attached_filters = 0;
1943                         break;
1944                 }
1945
1946                 iwl_mvm_set_bcast_filter(vif,
1947                                          &mvm->bcast_filters[i],
1948                                          &cmd->filters[data->current_filter]);
1949
1950                 /* skip current filter if it contains no attributes */
1951                 if (!cmd->filters[data->current_filter].num_attrs)
1952                         continue;
1953
1954                 /* attach the filter to current mac */
1955                 bcast_mac->attached_filters |=
1956                                 cpu_to_le16(BIT(data->current_filter));
1957
1958                 data->current_filter++;
1959         }
1960 }
1961
1962 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1963                                     struct iwl_bcast_filter_cmd *cmd)
1964 {
1965         struct iwl_bcast_iter_data iter_data = {
1966                 .mvm = mvm,
1967                 .cmd = cmd,
1968         };
1969
1970         if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1971                 return false;
1972
1973         memset(cmd, 0, sizeof(*cmd));
1974         cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1975         cmd->max_macs = ARRAY_SIZE(cmd->macs);
1976
1977 #ifdef CONFIG_IWLWIFI_DEBUGFS
1978         /* use debugfs filters/macs if override is configured */
1979         if (mvm->dbgfs_bcast_filtering.override) {
1980                 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1981                        sizeof(cmd->filters));
1982                 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1983                        sizeof(cmd->macs));
1984                 return true;
1985         }
1986 #endif
1987
1988         /* if no filters are configured, do nothing */
1989         if (!mvm->bcast_filters)
1990                 return false;
1991
1992         /* configure and attach these filters for each associated sta vif */
1993         ieee80211_iterate_active_interfaces(
1994                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1995                 iwl_mvm_bcast_filter_iterator, &iter_data);
1996
1997         return true;
1998 }
1999 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2000                                           struct ieee80211_vif *vif)
2001 {
2002         struct iwl_bcast_filter_cmd cmd;
2003
2004         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
2005                 return 0;
2006
2007         if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
2008                 return 0;
2009
2010         return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
2011                                     sizeof(cmd), &cmd);
2012 }
2013 #else
2014 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
2015                                                  struct ieee80211_vif *vif)
2016 {
2017         return 0;
2018 }
2019 #endif
2020
2021 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
2022                                              struct ieee80211_vif *vif,
2023                                              struct ieee80211_bss_conf *bss_conf,
2024                                              u32 changes)
2025 {
2026         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2027         int ret;
2028
2029         /*
2030          * Re-calculate the tsf id, as the master-slave relations depend on the
2031          * beacon interval, which was not known when the station interface was
2032          * added.
2033          */
2034         if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
2035                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2036
2037         /*
2038          * If we're not associated yet, take the (new) BSSID before associating
2039          * so the firmware knows. If we're already associated, then use the old
2040          * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
2041          * branch for disassociation below.
2042          */
2043         if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
2044                 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2045
2046         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
2047         if (ret)
2048                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2049
2050         /* after sending it once, adopt mac80211 data */
2051         memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
2052         mvmvif->associated = bss_conf->assoc;
2053
2054         if (changes & BSS_CHANGED_ASSOC) {
2055                 if (bss_conf->assoc) {
2056                         /* clear statistics to get clean beacon counter */
2057                         iwl_mvm_request_statistics(mvm, true);
2058                         memset(&mvmvif->beacon_stats, 0,
2059                                sizeof(mvmvif->beacon_stats));
2060
2061                         /* add quota for this interface */
2062                         ret = iwl_mvm_update_quotas(mvm, true, NULL);
2063                         if (ret) {
2064                                 IWL_ERR(mvm, "failed to update quotas\n");
2065                                 return;
2066                         }
2067
2068                         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
2069                                      &mvm->status)) {
2070                                 /*
2071                                  * If we're restarting then the firmware will
2072                                  * obviously have lost synchronisation with
2073                                  * the AP. It will attempt to synchronise by
2074                                  * itself, but we can make it more reliable by
2075                                  * scheduling a session protection time event.
2076                                  *
2077                                  * The firmware needs to receive a beacon to
2078                                  * catch up with synchronisation, use 110% of
2079                                  * the beacon interval.
2080                                  *
2081                                  * Set a large maximum delay to allow for more
2082                                  * than a single interface.
2083                                  */
2084                                 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
2085                                 iwl_mvm_protect_session(mvm, vif, dur, dur,
2086                                                         5 * dur, false);
2087                         }
2088
2089                         iwl_mvm_sf_update(mvm, vif, false);
2090                         iwl_mvm_power_vif_assoc(mvm, vif);
2091                         if (vif->p2p) {
2092                                 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
2093                                 iwl_mvm_update_smps(mvm, vif,
2094                                                     IWL_MVM_SMPS_REQ_PROT,
2095                                                     IEEE80211_SMPS_DYNAMIC);
2096                         }
2097                 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
2098                         /*
2099                          * If update fails - SF might be running in associated
2100                          * mode while disassociated - which is forbidden.
2101                          */
2102                         WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
2103                                   "Failed to update SF upon disassociation\n");
2104
2105                         /* remove AP station now that the MAC is unassoc */
2106                         ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
2107                         if (ret)
2108                                 IWL_ERR(mvm, "failed to remove AP station\n");
2109
2110                         if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
2111                                 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
2112                         mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
2113                         /* remove quota for this interface */
2114                         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2115                         if (ret)
2116                                 IWL_ERR(mvm, "failed to update quotas\n");
2117
2118                         if (vif->p2p)
2119                                 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
2120
2121                         /* this will take the cleared BSSID from bss_conf */
2122                         ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2123                         if (ret)
2124                                 IWL_ERR(mvm,
2125                                         "failed to update MAC %pM (clear after unassoc)\n",
2126                                         vif->addr);
2127                 }
2128
2129                 iwl_mvm_recalc_multicast(mvm);
2130                 iwl_mvm_configure_bcast_filter(mvm, vif);
2131
2132                 /* reset rssi values */
2133                 mvmvif->bf_data.ave_beacon_signal = 0;
2134
2135                 iwl_mvm_bt_coex_vif_change(mvm);
2136                 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
2137                                     IEEE80211_SMPS_AUTOMATIC);
2138         } else if (changes & BSS_CHANGED_BEACON_INFO) {
2139                 /*
2140                  * We received a beacon _after_ association so
2141                  * remove the session protection.
2142                  */
2143                 iwl_mvm_remove_time_event(mvm, mvmvif,
2144                                           &mvmvif->time_event_data);
2145         }
2146
2147         if (changes & BSS_CHANGED_BEACON_INFO) {
2148                 iwl_mvm_sf_update(mvm, vif, false);
2149                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2150         }
2151
2152         if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
2153                 ret = iwl_mvm_power_update_mac(mvm);
2154                 if (ret)
2155                         IWL_ERR(mvm, "failed to update power mode\n");
2156         }
2157
2158         if (changes & BSS_CHANGED_TXPOWER) {
2159                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2160                                 bss_conf->txpower);
2161                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2162         }
2163
2164         if (changes & BSS_CHANGED_CQM) {
2165                 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
2166                 /* reset cqm events tracking */
2167                 mvmvif->bf_data.last_cqm_event = 0;
2168                 if (mvmvif->bf_data.bf_enabled) {
2169                         ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2170                         if (ret)
2171                                 IWL_ERR(mvm,
2172                                         "failed to update CQM thresholds\n");
2173                 }
2174         }
2175
2176         if (changes & BSS_CHANGED_ARP_FILTER) {
2177                 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
2178                 iwl_mvm_configure_bcast_filter(mvm, vif);
2179         }
2180 }
2181
2182 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
2183                                  struct ieee80211_vif *vif)
2184 {
2185         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2186         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2187         int ret;
2188
2189         /*
2190          * iwl_mvm_mac_ctxt_add() might read directly from the device
2191          * (the system time), so make sure it is available.
2192          */
2193         ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
2194         if (ret)
2195                 return ret;
2196
2197         mutex_lock(&mvm->mutex);
2198
2199         /* Send the beacon template */
2200         ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
2201         if (ret)
2202                 goto out_unlock;
2203
2204         /*
2205          * Re-calculate the tsf id, as the master-slave relations depend on the
2206          * beacon interval, which was not known when the AP interface was added.
2207          */
2208         if (vif->type == NL80211_IFTYPE_AP)
2209                 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
2210
2211         /* Add the mac context */
2212         ret = iwl_mvm_mac_ctxt_add(mvm, vif);
2213         if (ret)
2214                 goto out_unlock;
2215
2216         /* Perform the binding */
2217         ret = iwl_mvm_binding_add_vif(mvm, vif);
2218         if (ret)
2219                 goto out_remove;
2220
2221         /* Send the bcast station. At this stage the TBTT and DTIM time events
2222          * are added and applied to the scheduler */
2223         ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
2224         if (ret)
2225                 goto out_unbind;
2226
2227         /* must be set before quota calculations */
2228         mvmvif->ap_ibss_active = true;
2229
2230         /* power updated needs to be done before quotas */
2231         iwl_mvm_power_update_mac(mvm);
2232
2233         ret = iwl_mvm_update_quotas(mvm, false, NULL);
2234         if (ret)
2235                 goto out_quota_failed;
2236
2237         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2238         if (vif->p2p && mvm->p2p_device_vif)
2239                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2240
2241         iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
2242
2243         iwl_mvm_bt_coex_vif_change(mvm);
2244
2245         /* we don't support TDLS during DCM */
2246         if (iwl_mvm_phy_ctx_count(mvm) > 1)
2247                 iwl_mvm_teardown_tdls_peers(mvm);
2248
2249         goto out_unlock;
2250
2251 out_quota_failed:
2252         iwl_mvm_power_update_mac(mvm);
2253         mvmvif->ap_ibss_active = false;
2254         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2255 out_unbind:
2256         iwl_mvm_binding_remove_vif(mvm, vif);
2257 out_remove:
2258         iwl_mvm_mac_ctxt_remove(mvm, vif);
2259 out_unlock:
2260         mutex_unlock(&mvm->mutex);
2261         iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
2262         return ret;
2263 }
2264
2265 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
2266                                  struct ieee80211_vif *vif)
2267 {
2268         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2269         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2270
2271         iwl_mvm_prepare_mac_removal(mvm, vif);
2272
2273         mutex_lock(&mvm->mutex);
2274
2275         /* Handle AP stop while in CSA */
2276         if (rcu_access_pointer(mvm->csa_vif) == vif) {
2277                 iwl_mvm_remove_time_event(mvm, mvmvif,
2278                                           &mvmvif->time_event_data);
2279                 RCU_INIT_POINTER(mvm->csa_vif, NULL);
2280         }
2281
2282         if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
2283                 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
2284                 mvm->csa_tx_block_bcn_timeout = 0;
2285         }
2286
2287         mvmvif->ap_ibss_active = false;
2288         mvm->ap_last_beacon_gp2 = 0;
2289
2290         iwl_mvm_bt_coex_vif_change(mvm);
2291
2292         iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
2293
2294         /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
2295         if (vif->p2p && mvm->p2p_device_vif)
2296                 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
2297
2298         iwl_mvm_update_quotas(mvm, false, NULL);
2299         iwl_mvm_send_rm_bcast_sta(mvm, vif);
2300         iwl_mvm_binding_remove_vif(mvm, vif);
2301
2302         iwl_mvm_power_update_mac(mvm);
2303
2304         iwl_mvm_mac_ctxt_remove(mvm, vif);
2305
2306         mutex_unlock(&mvm->mutex);
2307 }
2308
2309 static void
2310 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
2311                                  struct ieee80211_vif *vif,
2312                                  struct ieee80211_bss_conf *bss_conf,
2313                                  u32 changes)
2314 {
2315         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2316
2317         /* Changes will be applied when the AP/IBSS is started */
2318         if (!mvmvif->ap_ibss_active)
2319                 return;
2320
2321         if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
2322                        BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
2323             iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
2324                 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
2325
2326         /* Need to send a new beacon template to the FW */
2327         if (changes & BSS_CHANGED_BEACON &&
2328             iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
2329                 IWL_WARN(mvm, "Failed updating beacon data\n");
2330
2331         if (changes & BSS_CHANGED_TXPOWER) {
2332                 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
2333                                 bss_conf->txpower);
2334                 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
2335         }
2336
2337 }
2338
2339 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
2340                                      struct ieee80211_vif *vif,
2341                                      struct ieee80211_bss_conf *bss_conf,
2342                                      u32 changes)
2343 {
2344         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2345
2346         /*
2347          * iwl_mvm_bss_info_changed_station() might call
2348          * iwl_mvm_protect_session(), which reads directly from
2349          * the device (the system time), so make sure it is available.
2350          */
2351         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
2352                 return;
2353
2354         mutex_lock(&mvm->mutex);
2355
2356         if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
2357                 iwl_mvm_scan_offload_stop(mvm, true);
2358
2359         switch (vif->type) {
2360         case NL80211_IFTYPE_STATION:
2361                 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
2362                 break;
2363         case NL80211_IFTYPE_AP:
2364         case NL80211_IFTYPE_ADHOC:
2365                 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
2366                 break;
2367         default:
2368                 /* shouldn't happen */
2369                 WARN_ON_ONCE(1);
2370         }
2371
2372         mutex_unlock(&mvm->mutex);
2373         iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
2374 }
2375
2376 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
2377                                           enum iwl_scan_status scan_type)
2378 {
2379         int ret;
2380         bool wait_for_handlers = false;
2381
2382         mutex_lock(&mvm->mutex);
2383
2384         if (mvm->scan_status != scan_type) {
2385                 ret = 0;
2386                 /* make sure there are no pending notifications */
2387                 wait_for_handlers = true;
2388                 goto out;
2389         }
2390
2391         switch (scan_type) {
2392         case IWL_MVM_SCAN_SCHED:
2393                 ret = iwl_mvm_scan_offload_stop(mvm, true);
2394                 break;
2395         case IWL_MVM_SCAN_OS:
2396                 ret = iwl_mvm_cancel_scan(mvm);
2397                 break;
2398         case IWL_MVM_SCAN_NONE:
2399         default:
2400                 WARN_ON_ONCE(1);
2401                 ret = -EINVAL;
2402                 break;
2403         }
2404         if (ret)
2405                 goto out;
2406
2407         wait_for_handlers = true;
2408 out:
2409         mutex_unlock(&mvm->mutex);
2410
2411         /* make sure we consume the completion notification */
2412         if (wait_for_handlers)
2413                 iwl_mvm_wait_for_async_handlers(mvm);
2414
2415         return ret;
2416 }
2417 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
2418                                struct ieee80211_vif *vif,
2419                                struct ieee80211_scan_request *hw_req)
2420 {
2421         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2422         struct cfg80211_scan_request *req = &hw_req->req;
2423         int ret;
2424
2425         if (req->n_channels == 0 ||
2426             req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
2427                 return -EINVAL;
2428
2429         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2430                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
2431                 if (ret)
2432                         return ret;
2433         }
2434
2435         mutex_lock(&mvm->mutex);
2436
2437         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2438                 IWL_ERR(mvm, "scan while LAR regdomain is not set\n");
2439                 ret = -EBUSY;
2440                 goto out;
2441         }
2442
2443         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2444                 ret = -EBUSY;
2445                 goto out;
2446         }
2447
2448         iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
2449
2450         if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
2451                 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
2452         else
2453                 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
2454
2455         if (ret)
2456                 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
2457 out:
2458         mutex_unlock(&mvm->mutex);
2459         return ret;
2460 }
2461
2462 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
2463                                        struct ieee80211_vif *vif)
2464 {
2465         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2466
2467         mutex_lock(&mvm->mutex);
2468
2469         /* Due to a race condition, it's possible that mac80211 asks
2470          * us to stop a hw_scan when it's already stopped.  This can
2471          * happen, for instance, if we stopped the scan ourselves,
2472          * called ieee80211_scan_completed() and the userspace called
2473          * cancel scan scan before ieee80211_scan_work() could run.
2474          * To handle that, simply return if the scan is not running.
2475         */
2476         /* FIXME: for now, we ignore this race for UMAC scans, since
2477          * they don't set the scan_status.
2478          */
2479         if ((mvm->scan_status == IWL_MVM_SCAN_OS) ||
2480             (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN))
2481                 iwl_mvm_cancel_scan(mvm);
2482
2483         mutex_unlock(&mvm->mutex);
2484 }
2485
2486 static void
2487 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2488                                   struct ieee80211_sta *sta, u16 tids,
2489                                   int num_frames,
2490                                   enum ieee80211_frame_release_type reason,
2491                                   bool more_data)
2492 {
2493         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2494
2495         /* Called when we need to transmit (a) frame(s) from mac80211 */
2496
2497         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2498                                           tids, more_data, false);
2499 }
2500
2501 static void
2502 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2503                                     struct ieee80211_sta *sta, u16 tids,
2504                                     int num_frames,
2505                                     enum ieee80211_frame_release_type reason,
2506                                     bool more_data)
2507 {
2508         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2509
2510         /* Called when we need to transmit (a) frame(s) from agg queue */
2511
2512         iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2513                                           tids, more_data, true);
2514 }
2515
2516 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2517                                    struct ieee80211_vif *vif,
2518                                    enum sta_notify_cmd cmd,
2519                                    struct ieee80211_sta *sta)
2520 {
2521         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2522         struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2523         unsigned long txqs = 0, tids = 0;
2524         int tid;
2525
2526         spin_lock_bh(&mvmsta->lock);
2527         for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2528                 struct iwl_mvm_tid_data *tid_data = &mvmsta->tid_data[tid];
2529
2530                 if (tid_data->state != IWL_AGG_ON &&
2531                     tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2532                         continue;
2533
2534                 __set_bit(tid_data->txq_id, &txqs);
2535
2536                 if (iwl_mvm_tid_queued(tid_data) == 0)
2537                         continue;
2538
2539                 __set_bit(tid, &tids);
2540         }
2541
2542         switch (cmd) {
2543         case STA_NOTIFY_SLEEP:
2544                 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2545                         ieee80211_sta_block_awake(hw, sta, true);
2546
2547                 for_each_set_bit(tid, &tids, IWL_MAX_TID_COUNT)
2548                         ieee80211_sta_set_buffered(sta, tid, true);
2549
2550                 if (txqs)
2551                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, true);
2552                 /*
2553                  * The fw updates the STA to be asleep. Tx packets on the Tx
2554                  * queues to this station will not be transmitted. The fw will
2555                  * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2556                  */
2557                 break;
2558         case STA_NOTIFY_AWAKE:
2559                 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2560                         break;
2561
2562                 if (txqs)
2563                         iwl_trans_freeze_txq_timer(mvm->trans, txqs, false);
2564                 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2565                 break;
2566         default:
2567                 break;
2568         }
2569         spin_unlock_bh(&mvmsta->lock);
2570 }
2571
2572 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2573                                        struct ieee80211_vif *vif,
2574                                        struct ieee80211_sta *sta)
2575 {
2576         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2577         struct iwl_mvm_sta *mvm_sta = iwl_mvm_sta_from_mac80211(sta);
2578
2579         /*
2580          * This is called before mac80211 does RCU synchronisation,
2581          * so here we already invalidate our internal RCU-protected
2582          * station pointer. The rest of the code will thus no longer
2583          * be able to find the station this way, and we don't rely
2584          * on further RCU synchronisation after the sta_state()
2585          * callback deleted the station.
2586          */
2587         mutex_lock(&mvm->mutex);
2588         if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2589                 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2590                                    ERR_PTR(-ENOENT));
2591         mutex_unlock(&mvm->mutex);
2592 }
2593
2594 static void iwl_mvm_check_uapsd(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
2595                                 const u8 *bssid)
2596 {
2597         if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT))
2598                 return;
2599
2600         if (iwlwifi_mod_params.uapsd_disable) {
2601                 vif->driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD;
2602                 return;
2603         }
2604
2605         vif->driver_flags |= IEEE80211_VIF_SUPPORTS_UAPSD;
2606 }
2607
2608 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2609                                  struct ieee80211_vif *vif,
2610                                  struct ieee80211_sta *sta,
2611                                  enum ieee80211_sta_state old_state,
2612                                  enum ieee80211_sta_state new_state)
2613 {
2614         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2615         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2616         int ret;
2617
2618         IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2619                            sta->addr, old_state, new_state);
2620
2621         /* this would be a mac80211 bug ... but don't crash */
2622         if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2623                 return -EINVAL;
2624
2625         /* if a STA is being removed, reuse its ID */
2626         flush_work(&mvm->sta_drained_wk);
2627
2628         mutex_lock(&mvm->mutex);
2629         if (old_state == IEEE80211_STA_NOTEXIST &&
2630             new_state == IEEE80211_STA_NONE) {
2631                 /*
2632                  * Firmware bug - it'll crash if the beacon interval is less
2633                  * than 16. We can't avoid connecting at all, so refuse the
2634                  * station state change, this will cause mac80211 to abandon
2635                  * attempts to connect to this AP, and eventually wpa_s will
2636                  * blacklist the AP...
2637                  */
2638                 if (vif->type == NL80211_IFTYPE_STATION &&
2639                     vif->bss_conf.beacon_int < 16) {
2640                         IWL_ERR(mvm,
2641                                 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2642                                 sta->addr, vif->bss_conf.beacon_int);
2643                         ret = -EINVAL;
2644                         goto out_unlock;
2645                 }
2646
2647                 if (sta->tdls &&
2648                     (vif->p2p ||
2649                      iwl_mvm_tdls_sta_count(mvm, NULL) ==
2650                                                 IWL_MVM_TDLS_STA_COUNT ||
2651                      iwl_mvm_phy_ctx_count(mvm) > 1)) {
2652                         IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2653                         ret = -EBUSY;
2654                         goto out_unlock;
2655                 }
2656
2657                 ret = iwl_mvm_add_sta(mvm, vif, sta);
2658                 if (sta->tdls && ret == 0)
2659                         iwl_mvm_recalc_tdls_state(mvm, vif, true);
2660         } else if (old_state == IEEE80211_STA_NONE &&
2661                    new_state == IEEE80211_STA_AUTH) {
2662                 /*
2663                  * EBS may be disabled due to previous failures reported by FW.
2664                  * Reset EBS status here assuming environment has been changed.
2665                  */
2666                 mvm->last_ebs_successful = true;
2667                 iwl_mvm_check_uapsd(mvm, vif, sta->addr);
2668                 ret = 0;
2669         } else if (old_state == IEEE80211_STA_AUTH &&
2670                    new_state == IEEE80211_STA_ASSOC) {
2671                 ret = iwl_mvm_update_sta(mvm, vif, sta);
2672                 if (ret == 0)
2673                         iwl_mvm_rs_rate_init(mvm, sta,
2674                                              mvmvif->phy_ctxt->channel->band,
2675                                              true);
2676         } else if (old_state == IEEE80211_STA_ASSOC &&
2677                    new_state == IEEE80211_STA_AUTHORIZED) {
2678
2679                 /* we don't support TDLS during DCM */
2680                 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2681                         iwl_mvm_teardown_tdls_peers(mvm);
2682
2683                 /* enable beacon filtering */
2684                 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2685                 ret = 0;
2686         } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2687                    new_state == IEEE80211_STA_ASSOC) {
2688                 /* disable beacon filtering */
2689                 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2690                 ret = 0;
2691         } else if (old_state == IEEE80211_STA_ASSOC &&
2692                    new_state == IEEE80211_STA_AUTH) {
2693                 ret = 0;
2694         } else if (old_state == IEEE80211_STA_AUTH &&
2695                    new_state == IEEE80211_STA_NONE) {
2696                 ret = 0;
2697         } else if (old_state == IEEE80211_STA_NONE &&
2698                    new_state == IEEE80211_STA_NOTEXIST) {
2699                 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2700                 if (sta->tdls)
2701                         iwl_mvm_recalc_tdls_state(mvm, vif, false);
2702         } else {
2703                 ret = -EIO;
2704         }
2705  out_unlock:
2706         mutex_unlock(&mvm->mutex);
2707
2708         if (sta->tdls && ret == 0) {
2709                 if (old_state == IEEE80211_STA_NOTEXIST &&
2710                     new_state == IEEE80211_STA_NONE)
2711                         ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2712                 else if (old_state == IEEE80211_STA_NONE &&
2713                          new_state == IEEE80211_STA_NOTEXIST)
2714                         ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2715         }
2716
2717         return ret;
2718 }
2719
2720 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2721 {
2722         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2723
2724         mvm->rts_threshold = value;
2725
2726         return 0;
2727 }
2728
2729 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2730                                   struct ieee80211_vif *vif,
2731                                   struct ieee80211_sta *sta, u32 changed)
2732 {
2733         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2734
2735         if (vif->type == NL80211_IFTYPE_STATION &&
2736             changed & IEEE80211_RC_NSS_CHANGED)
2737                 iwl_mvm_sf_update(mvm, vif, false);
2738 }
2739
2740 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2741                                struct ieee80211_vif *vif, u16 ac,
2742                                const struct ieee80211_tx_queue_params *params)
2743 {
2744         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2745         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2746
2747         mvmvif->queue_params[ac] = *params;
2748
2749         /*
2750          * No need to update right away, we'll get BSS_CHANGED_QOS
2751          * The exception is P2P_DEVICE interface which needs immediate update.
2752          */
2753         if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2754                 int ret;
2755
2756                 mutex_lock(&mvm->mutex);
2757                 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2758                 mutex_unlock(&mvm->mutex);
2759                 return ret;
2760         }
2761         return 0;
2762 }
2763
2764 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2765                                       struct ieee80211_vif *vif)
2766 {
2767         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2768         u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2769                            200 + vif->bss_conf.beacon_int);
2770         u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2771                                100 + vif->bss_conf.beacon_int);
2772
2773         if (WARN_ON_ONCE(vif->bss_conf.assoc))
2774                 return;
2775
2776         /*
2777          * iwl_mvm_protect_session() reads directly from the device
2778          * (the system time), so make sure it is available.
2779          */
2780         if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2781                 return;
2782
2783         mutex_lock(&mvm->mutex);
2784         /* Try really hard to protect the session and hear a beacon */
2785         iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2786         mutex_unlock(&mvm->mutex);
2787
2788         iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2789 }
2790
2791 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2792                                         struct ieee80211_vif *vif,
2793                                         struct cfg80211_sched_scan_request *req,
2794                                         struct ieee80211_scan_ies *ies)
2795 {
2796         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2797         int ret;
2798
2799         if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2800                 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2801                 if (ret)
2802                         return ret;
2803         }
2804
2805         mutex_lock(&mvm->mutex);
2806
2807         if (iwl_mvm_is_lar_supported(mvm) && !mvm->lar_regdom_set) {
2808                 IWL_ERR(mvm, "sched-scan while LAR regdomain is not set\n");
2809                 ret = -EBUSY;
2810                 goto out;
2811         }
2812
2813         if (!vif->bss_conf.idle) {
2814                 ret = -EBUSY;
2815                 goto out;
2816         }
2817
2818         if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2819                 ret = -EBUSY;
2820                 goto out;
2821         }
2822
2823         ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2824         if (ret)
2825                 mvm->scan_status = IWL_MVM_SCAN_NONE;
2826
2827 out:
2828         mutex_unlock(&mvm->mutex);
2829         return ret;
2830 }
2831
2832 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2833                                        struct ieee80211_vif *vif)
2834 {
2835         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2836         int ret;
2837
2838         mutex_lock(&mvm->mutex);
2839
2840         /* Due to a race condition, it's possible that mac80211 asks
2841          * us to stop a sched_scan when it's already stopped.  This
2842          * can happen, for instance, if we stopped the scan ourselves,
2843          * called ieee80211_sched_scan_stopped() and the userspace called
2844          * stop sched scan scan before ieee80211_sched_scan_stopped_work()
2845          * could run.  To handle this, simply return if the scan is
2846          * not running.
2847         */
2848         /* FIXME: for now, we ignore this race for UMAC scans, since
2849          * they don't set the scan_status.
2850          */
2851         if (mvm->scan_status != IWL_MVM_SCAN_SCHED &&
2852             !(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2853                 mutex_unlock(&mvm->mutex);
2854                 return 0;
2855         }
2856
2857         ret = iwl_mvm_scan_offload_stop(mvm, false);
2858         mutex_unlock(&mvm->mutex);
2859         iwl_mvm_wait_for_async_handlers(mvm);
2860
2861         return ret;
2862 }
2863
2864 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2865                                enum set_key_cmd cmd,
2866                                struct ieee80211_vif *vif,
2867                                struct ieee80211_sta *sta,
2868                                struct ieee80211_key_conf *key)
2869 {
2870         struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2871         int ret;
2872
2873         if (iwlwifi_mod_params.sw_crypto) {
2874                 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2875                 return -EOPNOTSUPP;
2876         }
2877
2878         switch (key->cipher) {
2879         case WLAN_CIPHER_SUITE_TKIP:
2880                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2881                 /* fall-through */
2882         case WLAN_CIPHER_SUITE_CCMP:
2883                 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2884                 break;
2885         case WLAN_CIPHER_SUITE_AES_CMAC:
2886                 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2887                 break;
2888         case WLAN_CIPHER_SUITE_WEP40:
2889         case WLAN_CIPHER_SUITE_WEP104:
2890                 /* For non-client mode, only use WEP keys for TX as we probably
2891                  * don't have a station yet anyway and would then have to keep
2892                  * track of the keys, linking them to each of the clients/peers
2893                  * as they appear. For now, don't do that, for performance WEP
2894                  * offload doesn't really matter much, but we need it for some
2895                  * other offload features in client mode.
2896                  */
2897                 if (vif->type != NL80211_IFTYPE_STATION)
2898                         return 0;
2899                 break;
2900         default:
2901                 /* currently FW supports only one optional cipher scheme */
2902                 if (hw->n_cipher_schemes &&
2903                     hw->cipher_schemes->cipher == key->cipher)
2904                         key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2905                 else
2906                         return -EOPNOTSUPP;
2907         }
2908
2909         mutex_lock(&mvm->mutex);
2910
2911         switch (cmd) {
2912         case SET_KEY:
2913                 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2914                      vif->type == NL80211_IFTYPE_AP) && !sta) {
2915                         /*
2916                          * GTK on AP interface is a TX-only key, return 0;
2917                          * on IBSS they're per-station and because we're lazy
2918                          * we don't support them for RX, so do the same.
2919                          */
2920                         ret = 0;
2921                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2922                         break;
2923                 }
2924
2925                 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2926                 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2927                 if (ret) {
2928                         IWL_WARN(mvm, "set key failed\n");
2929                         /*
2930                          * can't add key for RX, but we don't need it
2931                          * in the device for TX so still return 0
2932                          */
2933                         key->hw_key_idx = STA_KEY_IDX_INVALID;
2934                         ret = 0;
2935                 }
2936
2937                 break;
2938         case DISABLE_KEY:
2939                 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2940                         ret = 0;
2941                         break;
2942                 }
2943
2944                 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2945                 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2946                 break;