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iwlwifi: mvm: correctly handle PM/QoS changes from mac80211
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / iwlwifi / mvm / mac80211.c
blobcdc272d776e7f298baa6c71dc156ce576021e151
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 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63 #include <linux/kernel.h>
64 #include <linux/slab.h>
65 #include <linux/skbuff.h>
66 #include <linux/netdevice.h>
67 #include <linux/etherdevice.h>
68 #include <linux/ip.h>
69 #include <linux/if_arp.h>
70 #include <net/mac80211.h>
71 #include <net/ieee80211_radiotap.h>
72 #include <net/tcp.h>
73
74 #include "iwl-op-mode.h"
75 #include "iwl-io.h"
76 #include "mvm.h"
77 #include "sta.h"
78 #include "time-event.h"
79 #include "iwl-eeprom-parse.h"
80 #include "fw-api-scan.h"
81 #include "iwl-phy-db.h"
82 #include "testmode.h"
83 #include "iwl-fw-error-dump.h"
84 #include "iwl-prph.h"
85
86 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
87 {
88 .max = 1,
89 .types = BIT(NL80211_IFTYPE_STATION),
90 },
91 {
92 .max = 1,
93 .types = BIT(NL80211_IFTYPE_AP) |
94 BIT(NL80211_IFTYPE_P2P_CLIENT) |
95 BIT(NL80211_IFTYPE_P2P_GO),
96 },
97 {
98 .max = 1,
99 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
100 },
101 };
102
103 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
104 {
105 .num_different_channels = 1,
106 .max_interfaces = 3,
107 .limits = iwl_mvm_limits,
108 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
109 },
110 };
111
112 #ifdef CONFIG_PM_SLEEP
113 static const struct nl80211_wowlan_tcp_data_token_feature
114 iwl_mvm_wowlan_tcp_token_feature = {
115 .min_len = 0,
116 .max_len = 255,
117 .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
118 };
119
120 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
121 .tok = &iwl_mvm_wowlan_tcp_token_feature,
122 .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
123 sizeof(struct ethhdr) -
124 sizeof(struct iphdr) -
125 sizeof(struct tcphdr),
126 .data_interval_max = 65535, /* __le16 in API */
127 .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
128 sizeof(struct ethhdr) -
129 sizeof(struct iphdr) -
130 sizeof(struct tcphdr),
131 .seq = true,
132 };
133 #endif
134
135 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
136 /*
137 * Use the reserved field to indicate magic values.
138 * these values will only be used internally by the driver,
139 * and won't make it to the fw (reserved will be 0).
140 * BC_FILTER_MAGIC_IP - configure the val of this attribute to
141 * be the vif's ip address. in case there is not a single
142 * ip address (0, or more than 1), this attribute will
143 * be skipped.
144 * BC_FILTER_MAGIC_MAC - set the val of this attribute to
145 * the LSB bytes of the vif's mac address
146 */
147 enum {
148 BC_FILTER_MAGIC_NONE = 0,
149 BC_FILTER_MAGIC_IP,
150 BC_FILTER_MAGIC_MAC,
151 };
152
153 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
154 {
155 /* arp */
156 .discard = 0,
157 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
158 .attrs = {
159 {
160 /* frame type - arp, hw type - ethernet */
161 .offset_type =
162 BCAST_FILTER_OFFSET_PAYLOAD_START,
163 .offset = sizeof(rfc1042_header),
164 .val = cpu_to_be32(0x08060001),
165 .mask = cpu_to_be32(0xffffffff),
166 },
167 {
168 /* arp dest ip */
169 .offset_type =
170 BCAST_FILTER_OFFSET_PAYLOAD_START,
171 .offset = sizeof(rfc1042_header) + 2 +
172 sizeof(struct arphdr) +
173 ETH_ALEN + sizeof(__be32) +
174 ETH_ALEN,
175 .mask = cpu_to_be32(0xffffffff),
176 /* mark it as special field */
177 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
178 },
179 },
180 },
181 {
182 /* dhcp offer bcast */
183 .discard = 0,
184 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
185 .attrs = {
186 {
187 /* udp dest port - 68 (bootp client)*/
188 .offset_type = BCAST_FILTER_OFFSET_IP_END,
189 .offset = offsetof(struct udphdr, dest),
190 .val = cpu_to_be32(0x00440000),
191 .mask = cpu_to_be32(0xffff0000),
192 },
193 {
194 /* dhcp - lsb bytes of client hw address */
195 .offset_type = BCAST_FILTER_OFFSET_IP_END,
196 .offset = 38,
197 .mask = cpu_to_be32(0xffffffff),
198 /* mark it as special field */
199 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
200 },
201 },
202 },
203 /* last filter must be empty */
204 {},
205 };
206 #endif
207
208 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
209 {
210 if (!iwl_mvm_is_d0i3_supported(mvm))
211 return;
212
213 IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
214 spin_lock_bh(&mvm->refs_lock);
215 mvm->refs[ref_type]++;
216 spin_unlock_bh(&mvm->refs_lock);
217 iwl_trans_ref(mvm->trans);
218 }
219
220 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
221 {
222 if (!iwl_mvm_is_d0i3_supported(mvm))
223 return;
224
225 IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
226 spin_lock_bh(&mvm->refs_lock);
227 WARN_ON(!mvm->refs[ref_type]--);
228 spin_unlock_bh(&mvm->refs_lock);
229 iwl_trans_unref(mvm->trans);
230 }
231
232 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
233 enum iwl_mvm_ref_type except_ref)
234 {
235 int i, j;
236
237 if (!iwl_mvm_is_d0i3_supported(mvm))
238 return;
239
240 spin_lock_bh(&mvm->refs_lock);
241 for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
242 if (except_ref == i || !mvm->refs[i])
243 continue;
244
245 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
246 i, mvm->refs[i]);
247 for (j = 0; j < mvm->refs[i]; j++)
248 iwl_trans_unref(mvm->trans);
249 mvm->refs[i] = 0;
250 }
251 spin_unlock_bh(&mvm->refs_lock);
252 }
253
254 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
255 {
256 iwl_mvm_ref(mvm, ref_type);
257
258 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
259 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
260 HZ)) {
261 WARN_ON_ONCE(1);
262 iwl_mvm_unref(mvm, ref_type);
263 return -EIO;
264 }
265
266 return 0;
267 }
268
269 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
270 {
271 int i;
272
273 memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
274 for (i = 0; i < NUM_PHY_CTX; i++) {
275 mvm->phy_ctxts[i].id = i;
276 mvm->phy_ctxts[i].ref = 0;
277 }
278 }
279
280 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
281 {
282 /* we create the 802.11 header and SSID element */
283 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
284 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
285 return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
286 }
287
288 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
289 {
290 struct ieee80211_hw *hw = mvm->hw;
291 int num_mac, ret, i;
292
293 /* Tell mac80211 our characteristics */
294 hw->flags = IEEE80211_HW_SIGNAL_DBM |
295 IEEE80211_HW_SPECTRUM_MGMT |
296 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
297 IEEE80211_HW_QUEUE_CONTROL |
298 IEEE80211_HW_WANT_MONITOR_VIF |
299 IEEE80211_HW_SUPPORTS_PS |
300 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
301 IEEE80211_HW_AMPDU_AGGREGATION |
302 IEEE80211_HW_TIMING_BEACON_ONLY |
303 IEEE80211_HW_CONNECTION_MONITOR |
304 IEEE80211_HW_CHANCTX_STA_CSA |
305 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
306 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
307
308 hw->queues = mvm->first_agg_queue;
309 hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
310 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
311 IEEE80211_RADIOTAP_MCS_HAVE_STBC;
312 hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
313 hw->rate_control_algorithm = "iwl-mvm-rs";
314
315 /*
316 * Enable 11w if advertised by firmware and software crypto
317 * is not enabled (as the firmware will interpret some mgmt
318 * packets, so enabling it with software crypto isn't safe)
319 */
320 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
321 !iwlwifi_mod_params.sw_crypto)
322 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
323
324 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
325 IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
326 !iwlwifi_mod_params.uapsd_disable) {
327 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
328 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
329 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
330 }
331
332 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
333 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
334
335 hw->sta_data_size = sizeof(struct iwl_mvm_sta);
336 hw->vif_data_size = sizeof(struct iwl_mvm_vif);
337 hw->chanctx_data_size = sizeof(u16);
338
339 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
340 BIT(NL80211_IFTYPE_P2P_CLIENT) |
341 BIT(NL80211_IFTYPE_AP) |
342 BIT(NL80211_IFTYPE_P2P_GO) |
343 BIT(NL80211_IFTYPE_P2P_DEVICE) |
344 BIT(NL80211_IFTYPE_ADHOC);
345
346 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
347 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
348 REGULATORY_DISABLE_BEACON_HINTS;
349
350 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
351 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
352
353 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
354 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
355
356 hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
357 hw->wiphy->n_iface_combinations =
358 ARRAY_SIZE(iwl_mvm_iface_combinations);
359
360 hw->wiphy->max_remain_on_channel_duration = 10000;
361 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
362
363 /* Extract MAC address */
364 memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
365 hw->wiphy->addresses = mvm->addresses;
366 hw->wiphy->n_addresses = 1;
367
368 /* Extract additional MAC addresses if available */
369 num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
370 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
371
372 for (i = 1; i < num_mac; i++) {
373 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
374 ETH_ALEN);
375 mvm->addresses[i].addr[5]++;
376 hw->wiphy->n_addresses++;
377 }
378
379 iwl_mvm_reset_phy_ctxts(mvm);
380
381 hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
382
383 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
384
385 if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
386 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
387 &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
388 if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
389 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
390 &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
391
392 hw->wiphy->hw_version = mvm->trans->hw_id;
393
394 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
395 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
396 else
397 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
398
399 if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
400 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
401 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
402 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
403 /* we create the 802.11 header and zero length SSID IE. */
404 hw->wiphy->max_sched_scan_ie_len =
405 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
406 }
407
408 hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
409 NL80211_FEATURE_LOW_PRIORITY_SCAN |
410 NL80211_FEATURE_P2P_GO_OPPPS;
411
412 mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
413
414 /* currently FW API supports only one optional cipher scheme */
415 if (mvm->fw->cs[0].cipher) {
416 mvm->hw->n_cipher_schemes = 1;
417 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
418 }
419
420 #ifdef CONFIG_PM_SLEEP
421 if (iwl_mvm_is_d0i3_supported(mvm) &&
422 device_can_wakeup(mvm->trans->dev)) {
423 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
424 hw->wiphy->wowlan = &mvm->wowlan;
425 } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
426 mvm->trans->ops->d3_suspend &&
427 mvm->trans->ops->d3_resume &&
428 device_can_wakeup(mvm->trans->dev)) {
429 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
430 WIPHY_WOWLAN_DISCONNECT |
431 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
432 WIPHY_WOWLAN_RFKILL_RELEASE;
433 if (!iwlwifi_mod_params.sw_crypto)
434 mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
435 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
436 WIPHY_WOWLAN_4WAY_HANDSHAKE;
437
438 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
439 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
440 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
441 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
442 hw->wiphy->wowlan = &mvm->wowlan;
443 }
444 #endif
445
446 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
447 /* assign default bcast filtering configuration */
448 mvm->bcast_filters = iwl_mvm_default_bcast_filters;
449 #endif
450
451 ret = iwl_mvm_leds_init(mvm);
452 if (ret)
453 return ret;
454
455 ret = ieee80211_register_hw(mvm->hw);
456 if (ret)
457 iwl_mvm_leds_exit(mvm);
458
459 return ret;
460 }
461
462 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
463 struct ieee80211_sta *sta,
464 struct sk_buff *skb)
465 {
466 struct iwl_mvm_sta *mvmsta;
467 bool defer = false;
468
469 /*
470 * double check the IN_D0I3 flag both before and after
471 * taking the spinlock, in order to prevent taking
472 * the spinlock when not needed.
473 */
474 if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
475 return false;
476
477 spin_lock(&mvm->d0i3_tx_lock);
478 /*
479 * testing the flag again ensures the skb dequeue
480 * loop (on d0i3 exit) hasn't run yet.
481 */
482 if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
483 goto out;
484
485 mvmsta = iwl_mvm_sta_from_mac80211(sta);
486 if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
487 mvmsta->sta_id != mvm->d0i3_ap_sta_id)
488 goto out;
489
490 __skb_queue_tail(&mvm->d0i3_tx, skb);
491 ieee80211_stop_queues(mvm->hw);
492
493 /* trigger wakeup */
494 iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
495 iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
496
497 defer = true;
498 out:
499 spin_unlock(&mvm->d0i3_tx_lock);
500 return defer;
501 }
502
503 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
504 struct ieee80211_tx_control *control,
505 struct sk_buff *skb)
506 {
507 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
508 struct ieee80211_sta *sta = control->sta;
509 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
510 struct ieee80211_hdr *hdr = (void *)skb->data;
511
512 if (iwl_mvm_is_radio_killed(mvm)) {
513 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
514 goto drop;
515 }
516
517 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
518 !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
519 goto drop;
520
521 /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
522 if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
523 ieee80211_is_mgmt(hdr->frame_control) &&
524 !ieee80211_is_deauth(hdr->frame_control) &&
525 !ieee80211_is_disassoc(hdr->frame_control) &&
526 !ieee80211_is_action(hdr->frame_control)))
527 sta = NULL;
528
529 if (sta) {
530 if (iwl_mvm_defer_tx(mvm, sta, skb))
531 return;
532 if (iwl_mvm_tx_skb(mvm, skb, sta))
533 goto drop;
534 return;
535 }
536
537 if (iwl_mvm_tx_skb_non_sta(mvm, skb))
538 goto drop;
539 return;
540 drop:
541 ieee80211_free_txskb(hw, skb);
542 }
543
544 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
545 {
546 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
547 return false;
548 return true;
549 }
550
551 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
552 {
553 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
554 return false;
555 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
556 return true;
557
558 /* enabled by default */
559 return true;
560 }
561
562 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
563 struct ieee80211_vif *vif,
564 enum ieee80211_ampdu_mlme_action action,
565 struct ieee80211_sta *sta, u16 tid,
566 u16 *ssn, u8 buf_size)
567 {
568 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
569 int ret;
570 bool tx_agg_ref = false;
571
572 IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
573 sta->addr, tid, action);
574
575 if (!(mvm->nvm_data->sku_cap_11n_enable))
576 return -EACCES;
577
578 /* return from D0i3 before starting a new Tx aggregation */
579 switch (action) {
580 case IEEE80211_AMPDU_TX_START:
581 case IEEE80211_AMPDU_TX_STOP_CONT:
582 case IEEE80211_AMPDU_TX_STOP_FLUSH:
583 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
584 case IEEE80211_AMPDU_TX_OPERATIONAL:
585 /*
586 * for tx start, wait synchronously until D0i3 exit to
587 * get the correct sequence number for the tid.
588 * additionally, some other ampdu actions use direct
589 * target access, which is not handled automatically
590 * by the trans layer (unlike commands), so wait for
591 * d0i3 exit in these cases as well.
592 */
593 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
594 if (ret)
595 return ret;
596
597 tx_agg_ref = true;
598 break;
599 default:
600 break;
601 }
602
603 mutex_lock(&mvm->mutex);
604
605 switch (action) {
606 case IEEE80211_AMPDU_RX_START:
607 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
608 ret = -EINVAL;
609 break;
610 }
611 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
612 break;
613 case IEEE80211_AMPDU_RX_STOP:
614 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
615 break;
616 case IEEE80211_AMPDU_TX_START:
617 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
618 ret = -EINVAL;
619 break;
620 }
621 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
622 break;
623 case IEEE80211_AMPDU_TX_STOP_CONT:
624 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
625 break;
626 case IEEE80211_AMPDU_TX_STOP_FLUSH:
627 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
628 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
629 break;
630 case IEEE80211_AMPDU_TX_OPERATIONAL:
631 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
632 break;
633 default:
634 WARN_ON_ONCE(1);
635 ret = -EINVAL;
636 break;
637 }
638 mutex_unlock(&mvm->mutex);
639
640 /*
641 * If the tid is marked as started, we won't use it for offloaded
642 * traffic on the next D0i3 entry. It's safe to unref.
643 */
644 if (tx_agg_ref)
645 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
646
647 return ret;
648 }
649
650 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
651 struct ieee80211_vif *vif)
652 {
653 struct iwl_mvm *mvm = data;
654 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
655
656 mvmvif->uploaded = false;
657 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
658
659 /* does this make sense at all? */
660 mvmvif->color++;
661
662 spin_lock_bh(&mvm->time_event_lock);
663 iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
664 spin_unlock_bh(&mvm->time_event_lock);
665
666 mvmvif->phy_ctxt = NULL;
667 memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
668 }
669
670 #ifdef CONFIG_IWLWIFI_DEBUGFS
671 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
672 {
673 struct iwl_fw_error_dump_file *dump_file;
674 struct iwl_fw_error_dump_data *dump_data;
675 struct iwl_fw_error_dump_info *dump_info;
676 struct iwl_mvm_dump_ptrs *fw_error_dump;
677 const struct fw_img *img;
678 u32 sram_len, sram_ofs;
679 u32 file_len, rxf_len;
680 unsigned long flags;
681 int reg_val;
682
683 lockdep_assert_held(&mvm->mutex);
684
685 if (mvm->fw_error_dump)
686 return;
687
688 fw_error_dump = kzalloc(sizeof(*mvm->fw_error_dump), GFP_KERNEL);
689 if (!fw_error_dump)
690 return;
691
692 img = &mvm->fw->img[mvm->cur_ucode];
693 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
694 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
695
696 /* reading buffer size */
697 reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
698 rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
699
700 /* the register holds the value divided by 128 */
701 rxf_len = rxf_len << 7;
702
703 file_len = sizeof(*dump_file) +
704 sizeof(*dump_data) * 3 +
705 sram_len +
706 rxf_len +
707 sizeof(*dump_info);
708
709 dump_file = vzalloc(file_len);
710 if (!dump_file) {
711 kfree(fw_error_dump);
712 return;
713 }
714
715 fw_error_dump->op_mode_ptr = dump_file;
716
717 dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
718 dump_data = (void *)dump_file->data;
719
720 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
721 dump_data->len = cpu_to_le32(sizeof(*dump_info));
722 dump_info = (void *) dump_data->data;
723 dump_info->device_family =
724 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
725 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
726 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
727 memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
728 sizeof(dump_info->fw_human_readable));
729 strncpy(dump_info->dev_human_readable, mvm->cfg->name,
730 sizeof(dump_info->dev_human_readable));
731 strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
732 sizeof(dump_info->bus_human_readable));
733
734 dump_data = iwl_fw_error_next_data(dump_data);
735 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
736 dump_data->len = cpu_to_le32(rxf_len);
737
738 if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
739 u32 *rxf = (void *)dump_data->data;
740 int i;
741
742 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
743 iwl_trans_write_prph(mvm->trans,
744 RXF_LD_FENCE_OFFSET_ADDR,
745 i * sizeof(u32));
746 rxf[i] = iwl_trans_read_prph(mvm->trans,
747 RXF_FIFO_RD_FENCE_ADDR);
748 }
749 iwl_trans_release_nic_access(mvm->trans, &flags);
750 }
751
752 dump_data = iwl_fw_error_next_data(dump_data);
753 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
754 dump_data->len = cpu_to_le32(sram_len);
755 iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
756 sram_len);
757
758 fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
759 fw_error_dump->op_mode_len = file_len;
760 if (fw_error_dump->trans_ptr)
761 file_len += fw_error_dump->trans_ptr->len;
762 dump_file->file_len = cpu_to_le32(file_len);
763 mvm->fw_error_dump = fw_error_dump;
764 }
765 #endif
766
767 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
768 {
769 #ifdef CONFIG_IWLWIFI_DEBUGFS
770 static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
771
772 iwl_mvm_fw_error_dump(mvm);
773
774 /* notify the userspace about the error we had */
775 kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
776 #endif
777
778 iwl_trans_stop_device(mvm->trans);
779
780 mvm->scan_status = IWL_MVM_SCAN_NONE;
781
782 /* just in case one was running */
783 ieee80211_remain_on_channel_expired(mvm->hw);
784
785 ieee80211_iterate_active_interfaces_atomic(
786 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
787 iwl_mvm_cleanup_iterator, mvm);
788
789 mvm->p2p_device_vif = NULL;
790 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
791
792 iwl_mvm_reset_phy_ctxts(mvm);
793 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
794 memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
795 memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
796 memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
797 memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
798 memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
799 memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
800 memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
801
802 ieee80211_wake_queues(mvm->hw);
803
804 /* cleanup all stale references (scan, roc), but keep the
805 * ucode_down ref until reconfig is complete */
806 iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
807
808 mvm->vif_count = 0;
809 mvm->rx_ba_sessions = 0;
810 }
811
812 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
813 {
814 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
815 int ret;
816
817 mutex_lock(&mvm->mutex);
818
819 /* Clean up some internal and mac80211 state on restart */
820 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
821 iwl_mvm_restart_cleanup(mvm);
822
823 ret = iwl_mvm_up(mvm);
824
825 if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
826 /* Something went wrong - we need to finish some cleanup
827 * that normally iwl_mvm_mac_restart_complete() below
828 * would do.
829 */
830 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
831 iwl_mvm_d0i3_enable_tx(mvm, NULL);
832 }
833
834 mutex_unlock(&mvm->mutex);
835
836 return ret;
837 }
838
839 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
840 {
841 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
842 int ret;
843
844 mutex_lock(&mvm->mutex);
845
846 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
847 iwl_mvm_d0i3_enable_tx(mvm, NULL);
848 ret = iwl_mvm_update_quotas(mvm, NULL);
849 if (ret)
850 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
851 ret);
852
853 /* allow transport/FW low power modes */
854 iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
855
856 mutex_unlock(&mvm->mutex);
857 }
858
859 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
860 {
861 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
862
863 flush_work(&mvm->d0i3_exit_work);
864 flush_work(&mvm->async_handlers_wk);
865
866 mutex_lock(&mvm->mutex);
867
868 /* disallow low power states when the FW is down */
869 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
870
871 /* async_handlers_wk is now blocked */
872
873 /*
874 * The work item could be running or queued if the
875 * ROC time event stops just as we get here.
876 */
877 cancel_work_sync(&mvm->roc_done_wk);
878
879 iwl_trans_stop_device(mvm->trans);
880
881 iwl_mvm_async_handlers_purge(mvm);
882 /* async_handlers_list is empty and will stay empty: HW is stopped */
883
884 /* the fw is stopped, the aux sta is dead: clean up driver state */
885 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
886
887 mutex_unlock(&mvm->mutex);
888
889 /*
890 * The worker might have been waiting for the mutex, let it run and
891 * discover that its list is now empty.
892 */
893 cancel_work_sync(&mvm->async_handlers_wk);
894 }
895
896 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
897 {
898 u16 i;
899
900 lockdep_assert_held(&mvm->mutex);
901
902 for (i = 0; i < NUM_PHY_CTX; i++)
903 if (!mvm->phy_ctxts[i].ref)
904 return &mvm->phy_ctxts[i];
905
906 IWL_ERR(mvm, "No available PHY context\n");
907 return NULL;
908 }
909
910 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
911 s8 tx_power)
912 {
913 /* FW is in charge of regulatory enforcement */
914 struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
915 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
916 .pwr_restriction = cpu_to_le16(tx_power),
917 };
918
919 return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
920 sizeof(reduce_txpwr_cmd),
921 &reduce_txpwr_cmd);
922 }
923
924 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
925 struct ieee80211_vif *vif)
926 {
927 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
928 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
929 int ret;
930
931 /*
932 * make sure D0i3 exit is completed, otherwise a target access
933 * during tx queue configuration could be done when still in
934 * D0i3 state.
935 */
936 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
937 if (ret)
938 return ret;
939
940 /*
941 * Not much to do here. The stack will not allow interface
942 * types or combinations that we didn't advertise, so we
943 * don't really have to check the types.
944 */
945
946 mutex_lock(&mvm->mutex);
947
948 /* Allocate resources for the MAC context, and add it to the fw */
949 ret = iwl_mvm_mac_ctxt_init(mvm, vif);
950 if (ret)
951 goto out_unlock;
952
953 /* Counting number of interfaces is needed for legacy PM */
954 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
955 mvm->vif_count++;
956
957 /*
958 * The AP binding flow can be done only after the beacon
959 * template is configured (which happens only in the mac80211
960 * start_ap() flow), and adding the broadcast station can happen
961 * only after the binding.
962 * In addition, since modifying the MAC before adding a bcast
963 * station is not allowed by the FW, delay the adding of MAC context to
964 * the point where we can also add the bcast station.
965 * In short: there's not much we can do at this point, other than
966 * allocating resources :)
967 */
968 if (vif->type == NL80211_IFTYPE_AP ||
969 vif->type == NL80211_IFTYPE_ADHOC) {
970 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
971 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
972 qmask,
973 ieee80211_vif_type_p2p(vif));
974 if (ret) {
975 IWL_ERR(mvm, "Failed to allocate bcast sta\n");
976 goto out_release;
977 }
978
979 iwl_mvm_vif_dbgfs_register(mvm, vif);
980 goto out_unlock;
981 }
982
983 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
984 if (ret)
985 goto out_release;
986
987 ret = iwl_mvm_power_update_mac(mvm);
988 if (ret)
989 goto out_release;
990
991 /* beacon filtering */
992 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
993 if (ret)
994 goto out_remove_mac;
995
996 if (!mvm->bf_allowed_vif &&
997 vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
998 mvm->bf_allowed_vif = mvmvif;
999 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1000 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1001 }
1002
1003 /*
1004 * P2P_DEVICE interface does not have a channel context assigned to it,
1005 * so a dedicated PHY context is allocated to it and the corresponding
1006 * MAC context is bound to it at this stage.
1007 */
1008 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1009
1010 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1011 if (!mvmvif->phy_ctxt) {
1012 ret = -ENOSPC;
1013 goto out_free_bf;
1014 }
1015
1016 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1017 ret = iwl_mvm_binding_add_vif(mvm, vif);
1018 if (ret)
1019 goto out_unref_phy;
1020
1021 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1022 if (ret)
1023 goto out_unbind;
1024
1025 /* Save a pointer to p2p device vif, so it can later be used to
1026 * update the p2p device MAC when a GO is started/stopped */
1027 mvm->p2p_device_vif = vif;
1028 }
1029
1030 iwl_mvm_vif_dbgfs_register(mvm, vif);
1031 goto out_unlock;
1032
1033 out_unbind:
1034 iwl_mvm_binding_remove_vif(mvm, vif);
1035 out_unref_phy:
1036 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1037 out_free_bf:
1038 if (mvm->bf_allowed_vif == mvmvif) {
1039 mvm->bf_allowed_vif = NULL;
1040 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1041 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1042 }
1043 out_remove_mac:
1044 mvmvif->phy_ctxt = NULL;
1045 iwl_mvm_mac_ctxt_remove(mvm, vif);
1046 out_release:
1047 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1048 mvm->vif_count--;
1049
1050 iwl_mvm_mac_ctxt_release(mvm, vif);
1051 out_unlock:
1052 mutex_unlock(&mvm->mutex);
1053
1054 iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1055
1056 return ret;
1057 }
1058
1059 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1060 struct ieee80211_vif *vif)
1061 {
1062 u32 tfd_msk = 0, ac;
1063
1064 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1065 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
1066 tfd_msk |= BIT(vif->hw_queue[ac]);
1067
1068 if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
1069 tfd_msk |= BIT(vif->cab_queue);
1070
1071 if (tfd_msk) {
1072 mutex_lock(&mvm->mutex);
1073 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1074 mutex_unlock(&mvm->mutex);
1075 }
1076
1077 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1078 /*
1079 * Flush the ROC worker which will flush the OFFCHANNEL queue.
1080 * We assume here that all the packets sent to the OFFCHANNEL
1081 * queue are sent in ROC session.
1082 */
1083 flush_work(&mvm->roc_done_wk);
1084 } else {
1085 /*
1086 * By now, all the AC queues are empty. The AGG queues are
1087 * empty too. We already got all the Tx responses for all the
1088 * packets in the queues. The drain work can have been
1089 * triggered. Flush it.
1090 */
1091 flush_work(&mvm->sta_drained_wk);
1092 }
1093 }
1094
1095 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1096 struct ieee80211_vif *vif)
1097 {
1098 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1099 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1100
1101 iwl_mvm_prepare_mac_removal(mvm, vif);
1102
1103 mutex_lock(&mvm->mutex);
1104
1105 if (mvm->bf_allowed_vif == mvmvif) {
1106 mvm->bf_allowed_vif = NULL;
1107 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1108 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1109 }
1110
1111 iwl_mvm_vif_dbgfs_clean(mvm, vif);
1112
1113 /*
1114 * For AP/GO interface, the tear down of the resources allocated to the
1115 * interface is be handled as part of the stop_ap flow.
1116 */
1117 if (vif->type == NL80211_IFTYPE_AP ||
1118 vif->type == NL80211_IFTYPE_ADHOC) {
1119 #ifdef CONFIG_NL80211_TESTMODE
1120 if (vif == mvm->noa_vif) {
1121 mvm->noa_vif = NULL;
1122 mvm->noa_duration = 0;
1123 }
1124 #endif
1125 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1126 goto out_release;
1127 }
1128
1129 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1130 mvm->p2p_device_vif = NULL;
1131 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1132 iwl_mvm_binding_remove_vif(mvm, vif);
1133 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1134 mvmvif->phy_ctxt = NULL;
1135 }
1136
1137 if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1138 mvm->vif_count--;
1139
1140 iwl_mvm_power_update_mac(mvm);
1141 iwl_mvm_mac_ctxt_remove(mvm, vif);
1142
1143 out_release:
1144 iwl_mvm_mac_ctxt_release(mvm, vif);
1145 mutex_unlock(&mvm->mutex);
1146 }
1147
1148 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1149 {
1150 return 0;
1151 }
1152
1153 struct iwl_mvm_mc_iter_data {
1154 struct iwl_mvm *mvm;
1155 int port_id;
1156 };
1157
1158 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1159 struct ieee80211_vif *vif)
1160 {
1161 struct iwl_mvm_mc_iter_data *data = _data;
1162 struct iwl_mvm *mvm = data->mvm;
1163 struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1164 int ret, len;
1165
1166 /* if we don't have free ports, mcast frames will be dropped */
1167 if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1168 return;
1169
1170 if (vif->type != NL80211_IFTYPE_STATION ||
1171 !vif->bss_conf.assoc)
1172 return;
1173
1174 cmd->port_id = data->port_id++;
1175 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1176 len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1177
1178 ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1179 if (ret)
1180 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1181 }
1182
1183 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1184 {
1185 struct iwl_mvm_mc_iter_data iter_data = {
1186 .mvm = mvm,
1187 };
1188
1189 lockdep_assert_held(&mvm->mutex);
1190
1191 if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1192 return;
1193
1194 ieee80211_iterate_active_interfaces_atomic(
1195 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1196 iwl_mvm_mc_iface_iterator, &iter_data);
1197 }
1198
1199 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1200 struct netdev_hw_addr_list *mc_list)
1201 {
1202 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1203 struct iwl_mcast_filter_cmd *cmd;
1204 struct netdev_hw_addr *addr;
1205 int addr_count = netdev_hw_addr_list_count(mc_list);
1206 bool pass_all = false;
1207 int len;
1208
1209 if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1210 pass_all = true;
1211 addr_count = 0;
1212 }
1213
1214 len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1215 cmd = kzalloc(len, GFP_ATOMIC);
1216 if (!cmd)
1217 return 0;
1218
1219 if (pass_all) {
1220 cmd->pass_all = 1;
1221 return (u64)(unsigned long)cmd;
1222 }
1223
1224 netdev_hw_addr_list_for_each(addr, mc_list) {
1225 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1226 cmd->count, addr->addr);
1227 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1228 addr->addr, ETH_ALEN);
1229 cmd->count++;
1230 }
1231
1232 return (u64)(unsigned long)cmd;
1233 }
1234
1235 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1236 unsigned int changed_flags,
1237 unsigned int *total_flags,
1238 u64 multicast)
1239 {
1240 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1241 struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1242
1243 mutex_lock(&mvm->mutex);
1244
1245 /* replace previous configuration */
1246 kfree(mvm->mcast_filter_cmd);
1247 mvm->mcast_filter_cmd = cmd;
1248
1249 if (!cmd)
1250 goto out;
1251
1252 iwl_mvm_recalc_multicast(mvm);
1253 out:
1254 mutex_unlock(&mvm->mutex);
1255 *total_flags = 0;
1256 }
1257
1258 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1259 struct iwl_bcast_iter_data {
1260 struct iwl_mvm *mvm;
1261 struct iwl_bcast_filter_cmd *cmd;
1262 u8 current_filter;
1263 };
1264
1265 static void
1266 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1267 const struct iwl_fw_bcast_filter *in_filter,
1268 struct iwl_fw_bcast_filter *out_filter)
1269 {
1270 struct iwl_fw_bcast_filter_attr *attr;
1271 int i;
1272
1273 memcpy(out_filter, in_filter, sizeof(*out_filter));
1274
1275 for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1276 attr = &out_filter->attrs[i];
1277
1278 if (!attr->mask)
1279 break;
1280
1281 switch (attr->reserved1) {
1282 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1283 if (vif->bss_conf.arp_addr_cnt != 1) {
1284 attr->mask = 0;
1285 continue;
1286 }
1287
1288 attr->val = vif->bss_conf.arp_addr_list[0];
1289 break;
1290 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1291 attr->val = *(__be32 *)&vif->addr[2];
1292 break;
1293 default:
1294 break;
1295 }
1296 attr->reserved1 = 0;
1297 out_filter->num_attrs++;
1298 }
1299 }
1300
1301 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1302 struct ieee80211_vif *vif)
1303 {
1304 struct iwl_bcast_iter_data *data = _data;
1305 struct iwl_mvm *mvm = data->mvm;
1306 struct iwl_bcast_filter_cmd *cmd = data->cmd;
1307 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1308 struct iwl_fw_bcast_mac *bcast_mac;
1309 int i;
1310
1311 if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1312 return;
1313
1314 bcast_mac = &cmd->macs[mvmvif->id];
1315
1316 /*
1317 * enable filtering only for associated stations, but not for P2P
1318 * Clients
1319 */
1320 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1321 !vif->bss_conf.assoc)
1322 return;
1323
1324 bcast_mac->default_discard = 1;
1325
1326 /* copy all configured filters */
1327 for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1328 /*
1329 * Make sure we don't exceed our filters limit.
1330 * if there is still a valid filter to be configured,
1331 * be on the safe side and just allow bcast for this mac.
1332 */
1333 if (WARN_ON_ONCE(data->current_filter >=
1334 ARRAY_SIZE(cmd->filters))) {
1335 bcast_mac->default_discard = 0;
1336 bcast_mac->attached_filters = 0;
1337 break;
1338 }
1339
1340 iwl_mvm_set_bcast_filter(vif,
1341 &mvm->bcast_filters[i],
1342 &cmd->filters[data->current_filter]);
1343
1344 /* skip current filter if it contains no attributes */
1345 if (!cmd->filters[data->current_filter].num_attrs)
1346 continue;
1347
1348 /* attach the filter to current mac */
1349 bcast_mac->attached_filters |=
1350 cpu_to_le16(BIT(data->current_filter));
1351
1352 data->current_filter++;
1353 }
1354 }
1355
1356 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1357 struct iwl_bcast_filter_cmd *cmd)
1358 {
1359 struct iwl_bcast_iter_data iter_data = {
1360 .mvm = mvm,
1361 .cmd = cmd,
1362 };
1363
1364 memset(cmd, 0, sizeof(*cmd));
1365 cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1366 cmd->max_macs = ARRAY_SIZE(cmd->macs);
1367
1368 #ifdef CONFIG_IWLWIFI_DEBUGFS
1369 /* use debugfs filters/macs if override is configured */
1370 if (mvm->dbgfs_bcast_filtering.override) {
1371 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1372 sizeof(cmd->filters));
1373 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1374 sizeof(cmd->macs));
1375 return true;
1376 }
1377 #endif
1378
1379 /* if no filters are configured, do nothing */
1380 if (!mvm->bcast_filters)
1381 return false;
1382
1383 /* configure and attach these filters for each associated sta vif */
1384 ieee80211_iterate_active_interfaces(
1385 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1386 iwl_mvm_bcast_filter_iterator, &iter_data);
1387
1388 return true;
1389 }
1390 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1391 struct ieee80211_vif *vif)
1392 {
1393 struct iwl_bcast_filter_cmd cmd;
1394
1395 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1396 return 0;
1397
1398 if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1399 return 0;
1400
1401 return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1402 sizeof(cmd), &cmd);
1403 }
1404 #else
1405 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1406 struct ieee80211_vif *vif)
1407 {
1408 return 0;
1409 }
1410 #endif
1411
1412 static void iwl_mvm_teardown_tdls_peers(struct iwl_mvm *mvm)
1413 {
1414 struct ieee80211_sta *sta;
1415 struct iwl_mvm_sta *mvmsta;
1416 int i;
1417
1418 lockdep_assert_held(&mvm->mutex);
1419
1420 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1421 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1422 lockdep_is_held(&mvm->mutex));
1423 if (!sta || IS_ERR(sta) || !sta->tdls)
1424 continue;
1425
1426 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1427 ieee80211_tdls_oper_request(mvmsta->vif, sta->addr,
1428 NL80211_TDLS_TEARDOWN,
1429 WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED,
1430 GFP_KERNEL);
1431 }
1432 }
1433
1434 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1435 struct ieee80211_vif *vif,
1436 struct ieee80211_bss_conf *bss_conf,
1437 u32 changes)
1438 {
1439 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1440 int ret;
1441
1442 /*
1443 * Re-calculate the tsf id, as the master-slave relations depend on the
1444 * beacon interval, which was not known when the station interface was
1445 * added.
1446 */
1447 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1448 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1449
1450 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1451 if (ret)
1452 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1453
1454 if (changes & BSS_CHANGED_ASSOC) {
1455 if (bss_conf->assoc) {
1456 /* add quota for this interface */
1457 ret = iwl_mvm_update_quotas(mvm, NULL);
1458 if (ret) {
1459 IWL_ERR(mvm, "failed to update quotas\n");
1460 return;
1461 }
1462
1463 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1464 &mvm->status)) {
1465 /*
1466 * If we're restarting then the firmware will
1467 * obviously have lost synchronisation with
1468 * the AP. It will attempt to synchronise by
1469 * itself, but we can make it more reliable by
1470 * scheduling a session protection time event.
1471 *
1472 * The firmware needs to receive a beacon to
1473 * catch up with synchronisation, use 110% of
1474 * the beacon interval.
1475 *
1476 * Set a large maximum delay to allow for more
1477 * than a single interface.
1478 */
1479 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1480 iwl_mvm_protect_session(mvm, vif, dur, dur,
1481 5 * dur);
1482 }
1483
1484 iwl_mvm_sf_update(mvm, vif, false);
1485 iwl_mvm_power_vif_assoc(mvm, vif);
1486 if (vif->p2p)
1487 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1488 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1489 /*
1490 * If update fails - SF might be running in associated
1491 * mode while disassociated - which is forbidden.
1492 */
1493 WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1494 "Failed to update SF upon disassociation\n");
1495
1496 /* remove AP station now that the MAC is unassoc */
1497 ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1498 if (ret)
1499 IWL_ERR(mvm, "failed to remove AP station\n");
1500
1501 if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1502 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1503 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1504 /* remove quota for this interface */
1505 ret = iwl_mvm_update_quotas(mvm, NULL);
1506 if (ret)
1507 IWL_ERR(mvm, "failed to update quotas\n");
1508
1509 if (vif->p2p)
1510 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1511 }
1512
1513 iwl_mvm_recalc_multicast(mvm);
1514 iwl_mvm_configure_bcast_filter(mvm, vif);
1515
1516 /* reset rssi values */
1517 mvmvif->bf_data.ave_beacon_signal = 0;
1518
1519 iwl_mvm_bt_coex_vif_change(mvm);
1520 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1521 IEEE80211_SMPS_AUTOMATIC);
1522 } else if (changes & BSS_CHANGED_BEACON_INFO) {
1523 /*
1524 * We received a beacon _after_ association so
1525 * remove the session protection.
1526 */
1527 iwl_mvm_remove_time_event(mvm, mvmvif,
1528 &mvmvif->time_event_data);
1529 }
1530
1531 if (changes & BSS_CHANGED_BEACON_INFO) {
1532 iwl_mvm_sf_update(mvm, vif, false);
1533 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1534 }
1535
1536 if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1537 ret = iwl_mvm_power_update_mac(mvm);
1538 if (ret)
1539 IWL_ERR(mvm, "failed to update power mode\n");
1540 }
1541
1542 if (changes & BSS_CHANGED_TXPOWER) {
1543 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1544 bss_conf->txpower);
1545 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1546 }
1547
1548 if (changes & BSS_CHANGED_CQM) {
1549 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1550 /* reset cqm events tracking */
1551 mvmvif->bf_data.last_cqm_event = 0;
1552 if (mvmvif->bf_data.bf_enabled) {
1553 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1554 if (ret)
1555 IWL_ERR(mvm,
1556 "failed to update CQM thresholds\n");
1557 }
1558 }
1559
1560 if (changes & BSS_CHANGED_ARP_FILTER) {
1561 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1562 iwl_mvm_configure_bcast_filter(mvm, vif);
1563 }
1564 }
1565
1566 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1567 struct ieee80211_vif *vif)
1568 {
1569 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1570 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1571 int ret;
1572
1573 /*
1574 * iwl_mvm_mac_ctxt_add() might read directly from the device
1575 * (the system time), so make sure it is available.
1576 */
1577 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1578 if (ret)
1579 return ret;
1580
1581 mutex_lock(&mvm->mutex);
1582
1583 /* Send the beacon template */
1584 ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1585 if (ret)
1586 goto out_unlock;
1587
1588 /*
1589 * Re-calculate the tsf id, as the master-slave relations depend on the
1590 * beacon interval, which was not known when the AP interface was added.
1591 */
1592 if (vif->type == NL80211_IFTYPE_AP)
1593 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1594
1595 /* Add the mac context */
1596 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1597 if (ret)
1598 goto out_unlock;
1599
1600 /* Perform the binding */
1601 ret = iwl_mvm_binding_add_vif(mvm, vif);
1602 if (ret)
1603 goto out_remove;
1604
1605 /* Send the bcast station. At this stage the TBTT and DTIM time events
1606 * are added and applied to the scheduler */
1607 ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1608 if (ret)
1609 goto out_unbind;
1610
1611 /* must be set before quota calculations */
1612 mvmvif->ap_ibss_active = true;
1613
1614 /* power updated needs to be done before quotas */
1615 iwl_mvm_power_update_mac(mvm);
1616
1617 ret = iwl_mvm_update_quotas(mvm, NULL);
1618 if (ret)
1619 goto out_quota_failed;
1620
1621 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1622 if (vif->p2p && mvm->p2p_device_vif)
1623 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1624
1625 iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1626
1627 iwl_mvm_bt_coex_vif_change(mvm);
1628
1629 /* we don't support TDLS during DCM */
1630 if (iwl_mvm_phy_ctx_count(mvm) > 1)
1631 iwl_mvm_teardown_tdls_peers(mvm);
1632
1633 mutex_unlock(&mvm->mutex);
1634 return 0;
1635
1636 out_quota_failed:
1637 iwl_mvm_power_update_mac(mvm);
1638 mvmvif->ap_ibss_active = false;
1639 iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1640 out_unbind:
1641 iwl_mvm_binding_remove_vif(mvm, vif);
1642 out_remove:
1643 iwl_mvm_mac_ctxt_remove(mvm, vif);
1644 out_unlock:
1645 mutex_unlock(&mvm->mutex);
1646 iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1647 return ret;
1648 }
1649
1650 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1651 struct ieee80211_vif *vif)
1652 {
1653 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1654 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1655
1656 iwl_mvm_prepare_mac_removal(mvm, vif);
1657
1658 mutex_lock(&mvm->mutex);
1659
1660 /* Handle AP stop while in CSA */
1661 if (rcu_access_pointer(mvm->csa_vif) == vif) {
1662 iwl_mvm_remove_time_event(mvm, mvmvif,
1663 &mvmvif->time_event_data);
1664 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1665 }
1666
1667 if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1668 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1669 mvm->csa_tx_block_bcn_timeout = 0;
1670 }
1671
1672 mvmvif->ap_ibss_active = false;
1673 mvm->ap_last_beacon_gp2 = 0;
1674
1675 iwl_mvm_bt_coex_vif_change(mvm);
1676
1677 iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1678
1679 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1680 if (vif->p2p && mvm->p2p_device_vif)
1681 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1682
1683 iwl_mvm_update_quotas(mvm, NULL);
1684 iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1685 iwl_mvm_binding_remove_vif(mvm, vif);
1686
1687 iwl_mvm_power_update_mac(mvm);
1688
1689 iwl_mvm_mac_ctxt_remove(mvm, vif);
1690
1691 mutex_unlock(&mvm->mutex);
1692 }
1693
1694 static void
1695 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1696 struct ieee80211_vif *vif,
1697 struct ieee80211_bss_conf *bss_conf,
1698 u32 changes)
1699 {
1700 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1701
1702 /* Changes will be applied when the AP/IBSS is started */
1703 if (!mvmvif->ap_ibss_active)
1704 return;
1705
1706 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1707 BSS_CHANGED_BANDWIDTH) &&
1708 iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1709 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1710
1711 /* Need to send a new beacon template to the FW */
1712 if (changes & BSS_CHANGED_BEACON &&
1713 iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1714 IWL_WARN(mvm, "Failed updating beacon data\n");
1715 }
1716
1717 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1718 struct ieee80211_vif *vif,
1719 struct ieee80211_bss_conf *bss_conf,
1720 u32 changes)
1721 {
1722 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1723
1724 /*
1725 * iwl_mvm_bss_info_changed_station() might call
1726 * iwl_mvm_protect_session(), which reads directly from
1727 * the device (the system time), so make sure it is available.
1728 */
1729 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1730 return;
1731
1732 mutex_lock(&mvm->mutex);
1733
1734 if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1735 iwl_mvm_scan_offload_stop(mvm, true);
1736
1737 switch (vif->type) {
1738 case NL80211_IFTYPE_STATION:
1739 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1740 break;
1741 case NL80211_IFTYPE_AP:
1742 case NL80211_IFTYPE_ADHOC:
1743 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1744 break;
1745 default:
1746 /* shouldn't happen */
1747 WARN_ON_ONCE(1);
1748 }
1749
1750 mutex_unlock(&mvm->mutex);
1751 iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1752 }
1753
1754 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1755 enum iwl_scan_status scan_type)
1756 {
1757 int ret;
1758 bool wait_for_handlers = false;
1759
1760 mutex_lock(&mvm->mutex);
1761
1762 if (mvm->scan_status != scan_type) {
1763 ret = 0;
1764 /* make sure there are no pending notifications */
1765 wait_for_handlers = true;
1766 goto out;
1767 }
1768
1769 switch (scan_type) {
1770 case IWL_MVM_SCAN_SCHED:
1771 ret = iwl_mvm_scan_offload_stop(mvm, true);
1772 break;
1773 case IWL_MVM_SCAN_OS:
1774 ret = iwl_mvm_cancel_scan(mvm);
1775 break;
1776 case IWL_MVM_SCAN_NONE:
1777 default:
1778 WARN_ON_ONCE(1);
1779 ret = -EINVAL;
1780 break;
1781 }
1782 if (ret)
1783 goto out;
1784
1785 wait_for_handlers = true;
1786 out:
1787 mutex_unlock(&mvm->mutex);
1788
1789 /* make sure we consume the completion notification */
1790 if (wait_for_handlers)
1791 iwl_mvm_wait_for_async_handlers(mvm);
1792
1793 return ret;
1794 }
1795 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1796 struct ieee80211_vif *vif,
1797 struct ieee80211_scan_request *hw_req)
1798 {
1799 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1800 struct cfg80211_scan_request *req = &hw_req->req;
1801 int ret;
1802
1803 if (req->n_channels == 0 ||
1804 req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1805 return -EINVAL;
1806
1807 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1808 if (ret)
1809 return ret;
1810
1811 mutex_lock(&mvm->mutex);
1812
1813 if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1814 ret = -EBUSY;
1815 goto out;
1816 }
1817
1818 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1819
1820 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1821 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1822 else
1823 ret = iwl_mvm_scan_request(mvm, vif, req);
1824
1825 if (ret)
1826 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1827 out:
1828 mutex_unlock(&mvm->mutex);
1829 return ret;
1830 }
1831
1832 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1833 struct ieee80211_vif *vif)
1834 {
1835 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1836
1837 mutex_lock(&mvm->mutex);
1838
1839 iwl_mvm_cancel_scan(mvm);
1840
1841 mutex_unlock(&mvm->mutex);
1842 }
1843
1844 static void
1845 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1846 struct ieee80211_sta *sta, u16 tids,
1847 int num_frames,
1848 enum ieee80211_frame_release_type reason,
1849 bool more_data)
1850 {
1851 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1852
1853 /* Called when we need to transmit (a) frame(s) from mac80211 */
1854
1855 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1856 tids, more_data, false);
1857 }
1858
1859 static void
1860 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1861 struct ieee80211_sta *sta, u16 tids,
1862 int num_frames,
1863 enum ieee80211_frame_release_type reason,
1864 bool more_data)
1865 {
1866 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1867
1868 /* Called when we need to transmit (a) frame(s) from agg queue */
1869
1870 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1871 tids, more_data, true);
1872 }
1873
1874 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1875 struct ieee80211_vif *vif,
1876 enum sta_notify_cmd cmd,
1877 struct ieee80211_sta *sta)
1878 {
1879 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1880 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1881 int tid;
1882
1883 switch (cmd) {
1884 case STA_NOTIFY_SLEEP:
1885 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1886 ieee80211_sta_block_awake(hw, sta, true);
1887 spin_lock_bh(&mvmsta->lock);
1888 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1889 struct iwl_mvm_tid_data *tid_data;
1890
1891 tid_data = &mvmsta->tid_data[tid];
1892 if (tid_data->state != IWL_AGG_ON &&
1893 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1894 continue;
1895 if (iwl_mvm_tid_queued(tid_data) == 0)
1896 continue;
1897 ieee80211_sta_set_buffered(sta, tid, true);
1898 }
1899 spin_unlock_bh(&mvmsta->lock);
1900 /*
1901 * The fw updates the STA to be asleep. Tx packets on the Tx
1902 * queues to this station will not be transmitted. The fw will
1903 * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1904 */
1905 break;
1906 case STA_NOTIFY_AWAKE:
1907 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1908 break;
1909 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1910 break;
1911 default:
1912 break;
1913 }
1914 }
1915
1916 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1917 struct ieee80211_vif *vif,
1918 struct ieee80211_sta *sta)
1919 {
1920 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1921 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1922
1923 /*
1924 * This is called before mac80211 does RCU synchronisation,
1925 * so here we already invalidate our internal RCU-protected
1926 * station pointer. The rest of the code will thus no longer
1927 * be able to find the station this way, and we don't rely
1928 * on further RCU synchronisation after the sta_state()
1929 * callback deleted the station.
1930 */
1931 mutex_lock(&mvm->mutex);
1932 if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1933 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1934 ERR_PTR(-ENOENT));
1935 mutex_unlock(&mvm->mutex);
1936 }
1937
1938 int iwl_mvm_tdls_sta_count(struct iwl_mvm *mvm, struct ieee80211_vif *vif)
1939 {
1940 struct ieee80211_sta *sta;
1941 struct iwl_mvm_sta *mvmsta;
1942 int count = 0;
1943 int i;
1944
1945 lockdep_assert_held(&mvm->mutex);
1946
1947 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
1948 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
1949 lockdep_is_held(&mvm->mutex));
1950 if (!sta || IS_ERR(sta) || !sta->tdls)
1951 continue;
1952
1953 if (vif) {
1954 mvmsta = iwl_mvm_sta_from_mac80211(sta);
1955 if (mvmsta->vif != vif)
1956 continue;
1957 }
1958
1959 count++;
1960 }
1961
1962 return count;
1963 }
1964
1965 static void iwl_mvm_recalc_tdls_state(struct iwl_mvm *mvm,
1966 struct ieee80211_vif *vif,
1967 bool sta_added)
1968 {
1969 int tdls_sta_cnt = iwl_mvm_tdls_sta_count(mvm, vif);
1970
1971 /*
1972 * Disable ps when the first TDLS sta is added and re-enable it
1973 * when the last TDLS sta is removed
1974 */
1975 if ((tdls_sta_cnt == 1 && sta_added) ||
1976 (tdls_sta_cnt == 0 && !sta_added))
1977 iwl_mvm_power_update_mac(mvm);
1978 }
1979
1980 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1981 struct ieee80211_vif *vif,
1982 struct ieee80211_sta *sta,
1983 enum ieee80211_sta_state old_state,
1984 enum ieee80211_sta_state new_state)
1985 {
1986 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1987 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1988 int ret;
1989
1990 IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1991 sta->addr, old_state, new_state);
1992
1993 /* this would be a mac80211 bug ... but don't crash */
1994 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1995 return -EINVAL;
1996
1997 /* if a STA is being removed, reuse its ID */
1998 flush_work(&mvm->sta_drained_wk);
1999
2000 mutex_lock(&mvm->mutex);
2001 if (old_state == IEEE80211_STA_NOTEXIST &&
2002 new_state == IEEE80211_STA_NONE) {
2003 /*
2004 * Firmware bug - it'll crash if the beacon interval is less
2005 * than 16. We can't avoid connecting at all, so refuse the
2006 * station state change, this will cause mac80211 to abandon
2007 * attempts to connect to this AP, and eventually wpa_s will
2008 * blacklist the AP...
2009 */
2010 if (vif->type == NL80211_IFTYPE_STATION &&
2011 vif->bss_conf.beacon_int < 16) {
2012 IWL_ERR(mvm,
2013 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2014 sta->addr, vif->bss_conf.beacon_int);
2015 ret = -EINVAL;
2016 goto out_unlock;
2017 }
2018
2019 if (sta->tdls &&
2020 (vif->p2p ||
2021 iwl_mvm_tdls_sta_count(mvm, NULL) ==
2022 IWL_MVM_TDLS_STA_COUNT ||
2023 iwl_mvm_phy_ctx_count(mvm) > 1)) {
2024 IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2025 ret = -EBUSY;
2026 goto out_unlock;
2027 }
2028
2029 ret = iwl_mvm_add_sta(mvm, vif, sta);
2030 if (sta->tdls && ret == 0)
2031 iwl_mvm_recalc_tdls_state(mvm, vif, true);
2032 } else if (old_state == IEEE80211_STA_NONE &&
2033 new_state == IEEE80211_STA_AUTH) {
2034 /*
2035 * EBS may be disabled due to previous failures reported by FW.
2036 * Reset EBS status here assuming environment has been changed.
2037 */
2038 mvm->last_ebs_successful = true;
2039 ret = 0;
2040 } else if (old_state == IEEE80211_STA_AUTH &&
2041 new_state == IEEE80211_STA_ASSOC) {
2042 ret = iwl_mvm_update_sta(mvm, vif, sta);
2043 if (ret == 0)
2044 iwl_mvm_rs_rate_init(mvm, sta,
2045 mvmvif->phy_ctxt->channel->band,
2046 true);
2047 } else if (old_state == IEEE80211_STA_ASSOC &&
2048 new_state == IEEE80211_STA_AUTHORIZED) {
2049
2050 /* we don't support TDLS during DCM */
2051 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2052 iwl_mvm_teardown_tdls_peers(mvm);
2053
2054 /* enable beacon filtering */
2055 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2056 ret = 0;
2057 } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2058 new_state == IEEE80211_STA_ASSOC) {
2059 /* disable beacon filtering */
2060 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2061 ret = 0;
2062 } else if (old_state == IEEE80211_STA_ASSOC &&
2063 new_state == IEEE80211_STA_AUTH) {
2064 ret = 0;
2065 } else if (old_state == IEEE80211_STA_AUTH &&
2066 new_state == IEEE80211_STA_NONE) {
2067 ret = 0;
2068 } else if (old_state == IEEE80211_STA_NONE &&
2069 new_state == IEEE80211_STA_NOTEXIST) {
2070 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2071 if (sta->tdls)
2072 iwl_mvm_recalc_tdls_state(mvm, vif, false);
2073 } else {
2074 ret = -EIO;
2075 }
2076 out_unlock:
2077 mutex_unlock(&mvm->mutex);
2078
2079 return ret;
2080 }
2081
2082 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2083 {
2084 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2085
2086 mvm->rts_threshold = value;
2087
2088 return 0;
2089 }
2090
2091 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2092 struct ieee80211_vif *vif,
2093 struct ieee80211_sta *sta, u32 changed)
2094 {
2095 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2096
2097 if (vif->type == NL80211_IFTYPE_STATION &&
2098 changed & IEEE80211_RC_NSS_CHANGED)
2099 iwl_mvm_sf_update(mvm, vif, false);
2100 }
2101
2102 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2103 struct ieee80211_vif *vif, u16 ac,
2104 const struct ieee80211_tx_queue_params *params)
2105 {
2106 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2107 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2108
2109 mvmvif->queue_params[ac] = *params;
2110
2111 /*
2112 * No need to update right away, we'll get BSS_CHANGED_QOS
2113 * The exception is P2P_DEVICE interface which needs immediate update.
2114 */
2115 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2116 int ret;
2117
2118 mutex_lock(&mvm->mutex);
2119 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2120 mutex_unlock(&mvm->mutex);
2121 return ret;
2122 }
2123 return 0;
2124 }
2125
2126 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2127 struct ieee80211_vif *vif)
2128 {
2129 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2130 u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2131 200 + vif->bss_conf.beacon_int);
2132 u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2133 100 + vif->bss_conf.beacon_int);
2134
2135 if (WARN_ON_ONCE(vif->bss_conf.assoc))
2136 return;
2137
2138 /*
2139 * iwl_mvm_protect_session() reads directly from the device
2140 * (the system time), so make sure it is available.
2141 */
2142 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2143 return;
2144
2145 mutex_lock(&mvm->mutex);
2146 /* Try really hard to protect the session and hear a beacon */
2147 iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
2148 mutex_unlock(&mvm->mutex);
2149
2150 iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2151 }
2152
2153 static void iwl_mvm_mac_mgd_protect_tdls_discover(struct ieee80211_hw *hw,
2154 struct ieee80211_vif *vif)
2155 {
2156 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2157 u32 duration = 2 * vif->bss_conf.dtim_period * vif->bss_conf.beacon_int;
2158
2159 /*
2160 * iwl_mvm_protect_session() reads directly from the device
2161 * (the system time), so make sure it is available.
2162 */
2163 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_TDLS))
2164 return;
2165
2166 mutex_lock(&mvm->mutex);
2167 /* Protect the session to hear the TDLS setup response on the channel */
2168 iwl_mvm_protect_session(mvm, vif, duration, duration, 100);
2169 mutex_unlock(&mvm->mutex);
2170
2171 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_TDLS);
2172 }
2173
2174 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2175 struct ieee80211_vif *vif,
2176 struct cfg80211_sched_scan_request *req,
2177 struct ieee80211_scan_ies *ies)
2178 {
2179 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2180 int ret;
2181
2182 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2183 if (ret)
2184 return ret;
2185
2186 mutex_lock(&mvm->mutex);
2187
2188 if (!iwl_mvm_is_idle(mvm)) {
2189 ret = -EBUSY;
2190 goto out;
2191 }
2192
2193 if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2194 ret = -EBUSY;
2195 goto out;
2196 }
2197
2198 mvm->scan_status = IWL_MVM_SCAN_SCHED;
2199
2200 if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2201 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2202 if (ret)
2203 goto err;
2204 }
2205
2206 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2207 if (ret)
2208 goto err;
2209
2210 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2211 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2212 else
2213 ret = iwl_mvm_sched_scan_start(mvm, req);
2214
2215 if (!ret)
2216 goto out;
2217 err:
2218 mvm->scan_status = IWL_MVM_SCAN_NONE;
2219 out:
2220 mutex_unlock(&mvm->mutex);
2221 return ret;
2222 }
2223
2224 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2225 struct ieee80211_vif *vif)
2226 {
2227 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2228 int ret;
2229
2230 mutex_lock(&mvm->mutex);
2231 ret = iwl_mvm_scan_offload_stop(mvm, false);
2232 mutex_unlock(&mvm->mutex);
2233 iwl_mvm_wait_for_async_handlers(mvm);
2234
2235 return ret;
2236 }
2237
2238 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2239 enum set_key_cmd cmd,
2240 struct ieee80211_vif *vif,
2241 struct ieee80211_sta *sta,
2242 struct ieee80211_key_conf *key)
2243 {
2244 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2245 int ret;
2246
2247 if (iwlwifi_mod_params.sw_crypto) {
2248 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2249 return -EOPNOTSUPP;
2250 }
2251
2252 switch (key->cipher) {
2253 case WLAN_CIPHER_SUITE_TKIP:
2254 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2255 /* fall-through */
2256 case WLAN_CIPHER_SUITE_CCMP:
2257 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2258 break;
2259 case WLAN_CIPHER_SUITE_AES_CMAC:
2260 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2261 break;
2262 case WLAN_CIPHER_SUITE_WEP40:
2263 case WLAN_CIPHER_SUITE_WEP104:
2264 /*
2265 * Support for TX only, at least for now, so accept
2266 * the key and do nothing else. Then mac80211 will
2267 * pass it for TX but we don't have to use it for RX.
2268 */
2269 return 0;
2270 default:
2271 /* currently FW supports only one optional cipher scheme */
2272 if (hw->n_cipher_schemes &&
2273 hw->cipher_schemes->cipher == key->cipher)
2274 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2275 else
2276 return -EOPNOTSUPP;
2277 }
2278
2279 mutex_lock(&mvm->mutex);
2280
2281 switch (cmd) {
2282 case SET_KEY:
2283 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2284 vif->type == NL80211_IFTYPE_AP) && !sta) {
2285 /*
2286 * GTK on AP interface is a TX-only key, return 0;
2287 * on IBSS they're per-station and because we're lazy
2288 * we don't support them for RX, so do the same.
2289 */
2290 ret = 0;
2291 key->hw_key_idx = STA_KEY_IDX_INVALID;
2292 break;
2293 }
2294
2295 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2296 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2297 if (ret) {
2298 IWL_WARN(mvm, "set key failed\n");
2299 /*
2300 * can't add key for RX, but we don't need it
2301 * in the device for TX so still return 0
2302 */
2303 key->hw_key_idx = STA_KEY_IDX_INVALID;
2304 ret = 0;
2305 }
2306
2307 break;
2308 case DISABLE_KEY:
2309 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2310 ret = 0;
2311 break;
2312 }
2313
2314 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2315 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2316 break;
2317 default:
2318 ret = -EINVAL;
2319 }
2320
2321 mutex_unlock(&mvm->mutex);
2322 return ret;
2323 }
2324
2325 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2326 struct ieee80211_vif *vif,
2327 struct ieee80211_key_conf *keyconf,
2328 struct ieee80211_sta *sta,
2329 u32 iv32, u16 *phase1key)
2330 {
2331 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2332
2333 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2334 return;
2335
2336 iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2337 }
2338
2339
2340 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2341 struct iwl_rx_packet *pkt, void *data)
2342 {
2343 struct iwl_mvm *mvm =
2344 container_of(notif_wait, struct iwl_mvm, notif_wait);
2345 struct iwl_hs20_roc_res *resp;
2346 int resp_len = iwl_rx_packet_payload_len(pkt);
2347 struct iwl_mvm_time_event_data *te_data = data;
2348
2349 if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2350 return true;
2351
2352 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2353 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2354 return true;
2355 }
2356
2357 resp = (void *)pkt->data;
2358
2359 IWL_DEBUG_TE(mvm,
2360 "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2361 resp->status, resp->event_unique_id);
2362
2363 te_data->uid = le32_to_cpu(resp->event_unique_id);
2364 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2365 te_data->uid);
2366
2367 spin_lock_bh(&mvm->time_event_lock);
2368 list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2369 spin_unlock_bh(&mvm->time_event_lock);
2370
2371 return true;
2372 }
2373
2374 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2375 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2376 struct ieee80211_channel *channel,
2377 struct ieee80211_vif *vif,
2378 int duration)
2379 {
2380 int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2381 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2382 struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2383 static const u8 time_event_response[] = { HOT_SPOT_CMD };
2384 struct iwl_notification_wait wait_time_event;
2385 struct iwl_hs20_roc_req aux_roc_req = {
2386 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2387 .id_and_color =
2388 cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2389 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2390 /* Set the channel info data */
2391 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2392 PHY_BAND_24 : PHY_BAND_5,
2393 .channel_info.channel = channel->hw_value,
2394 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2395 /* Set the time and duration */
2396 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2397 .apply_time_max_delay =
2398 cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2399 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2400 };
2401
2402 /* Set the node address */
2403 memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2404
2405 te_data->vif = vif;
2406 te_data->duration = duration;
2407 te_data->id = HOT_SPOT_CMD;
2408
2409 lockdep_assert_held(&mvm->mutex);
2410
2411 spin_lock_bh(&mvm->time_event_lock);
2412 list_add_tail(&te_data->list, &mvm->time_event_list);
2413 spin_unlock_bh(&mvm->time_event_lock);
2414
2415 /*
2416 * Use a notification wait, which really just processes the
2417 * command response and doesn't wait for anything, in order
2418 * to be able to process the response and get the UID inside
2419 * the RX path. Using CMD_WANT_SKB doesn't work because it
2420 * stores the buffer and then wakes up this thread, by which
2421 * time another notification (that the time event started)
2422 * might already be processed unsuccessfully.
2423 */
2424 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2425 time_event_response,
2426 ARRAY_SIZE(time_event_response),
2427 iwl_mvm_rx_aux_roc, te_data);
2428
2429 res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2430 &aux_roc_req);
2431
2432 if (res) {
2433 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2434 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2435 goto out_clear_te;
2436 }
2437
2438 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2439 res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2440 /* should never fail */
2441 WARN_ON_ONCE(res);
2442
2443 if (res) {
2444 out_clear_te:
2445 spin_lock_bh(&mvm->time_event_lock);
2446 iwl_mvm_te_clear_data(mvm, te_data);
2447 spin_unlock_bh(&mvm->time_event_lock);
2448 }
2449
2450 return res;
2451 }
2452
2453 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2454 struct ieee80211_vif *vif,
2455 struct ieee80211_channel *channel,
2456 int duration,
2457 enum ieee80211_roc_type type)
2458 {
2459 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2460 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2461 struct cfg80211_chan_def chandef;
2462 struct iwl_mvm_phy_ctxt *phy_ctxt;
2463 int ret, i;
2464
2465 IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2466 duration, type);
2467
2468 switch (vif->type) {
2469 case NL80211_IFTYPE_STATION:
2470 /* Use aux roc framework (HS20) */
2471 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2472 vif, duration);
2473 return ret;
2474 case NL80211_IFTYPE_P2P_DEVICE:
2475 /* handle below */
2476 break;
2477 default:
2478 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2479 return -EINVAL;
2480 }
2481
2482 mutex_lock(&mvm->mutex);
2483
2484 for (i = 0; i < NUM_PHY_CTX; i++) {
2485 phy_ctxt = &mvm->phy_ctxts[i];
2486 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2487 continue;
2488
2489 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2490 /*
2491 * Unbind the P2P_DEVICE from the current PHY context,
2492 * and if the PHY context is not used remove it.
2493 */
2494 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2495 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2496 goto out_unlock;
2497
2498 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2499
2500 /* Bind the P2P_DEVICE to the current PHY Context */
2501 mvmvif->phy_ctxt = phy_ctxt;
2502
2503 ret = iwl_mvm_binding_add_vif(mvm, vif);
2504 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2505 goto out_unlock;
2506
2507 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2508 goto schedule_time_event;
2509 }
2510 }
2511
2512 /* Need to update the PHY context only if the ROC channel changed */
2513 if (channel == mvmvif->phy_ctxt->channel)
2514 goto schedule_time_event;
2515
2516 cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2517
2518 /*
2519 * Change the PHY context configuration as it is currently referenced
2520 * only by the P2P Device MAC
2521 */
2522 if (mvmvif->phy_ctxt->ref == 1) {
2523 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2524 &chandef, 1, 1);
2525 if (ret)
2526 goto out_unlock;
2527 } else {
2528 /*
2529 * The PHY context is shared with other MACs. Need to remove the
2530 * P2P Device from the binding, allocate an new PHY context and
2531 * create a new binding
2532 */
2533 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2534 if (!phy_ctxt) {
2535 ret = -ENOSPC;
2536 goto out_unlock;
2537 }
2538
2539 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2540 1, 1);
2541 if (ret) {
2542 IWL_ERR(mvm, "Failed to change PHY context\n");
2543 goto out_unlock;
2544 }
2545
2546 /* Unbind the P2P_DEVICE from the current PHY context */
2547 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2548 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2549 goto out_unlock;
2550
2551 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2552
2553 /* Bind the P2P_DEVICE to the new allocated PHY context */
2554 mvmvif->phy_ctxt = phy_ctxt;
2555
2556 ret = iwl_mvm_binding_add_vif(mvm, vif);
2557 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2558 goto out_unlock;
2559
2560 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2561 }
2562
2563 schedule_time_event:
2564 /* Schedule the time events */
2565 ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2566
2567 out_unlock:
2568 mutex_unlock(&mvm->mutex);
2569 IWL_DEBUG_MAC80211(mvm, "leave\n");
2570 return ret;
2571 }
2572
2573 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2574 {
2575 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2576
2577 IWL_DEBUG_MAC80211(mvm, "enter\n");
2578
2579 mutex_lock(&mvm->mutex);
2580 iwl_mvm_stop_p2p_roc(mvm);
2581 mutex_unlock(&mvm->mutex);
2582
2583 IWL_DEBUG_MAC80211(mvm, "leave\n");
2584 return 0;
2585 }
2586
2587 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2588 struct ieee80211_chanctx_conf *ctx)
2589 {
2590 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2591 struct iwl_mvm_phy_ctxt *phy_ctxt;
2592 int ret;
2593
2594 lockdep_assert_held(&mvm->mutex);
2595
2596 IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2597
2598 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2599 if (!phy_ctxt) {
2600 ret = -ENOSPC;
2601 goto out;
2602 }
2603
2604 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2605 ctx->rx_chains_static,
2606 ctx->rx_chains_dynamic);
2607 if (ret) {
2608 IWL_ERR(mvm, "Failed to add PHY context\n");
2609 goto out;
2610 }
2611
2612 iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2613 *phy_ctxt_id = phy_ctxt->id;
2614 out:
2615 return ret;
2616 }
2617
2618 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2619 struct ieee80211_chanctx_conf *ctx)
2620 {
2621 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2622 int ret;
2623
2624 mutex_lock(&mvm->mutex);
2625 ret = __iwl_mvm_add_chanctx(mvm, ctx);
2626 mutex_unlock(&mvm->mutex);
2627
2628 return ret;
2629 }
2630
2631 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2632 struct ieee80211_chanctx_conf *ctx)
2633 {
2634 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2635 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2636
2637 lockdep_assert_held(&mvm->mutex);
2638
2639 iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2640 }
2641
2642 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2643 struct ieee80211_chanctx_conf *ctx)
2644 {
2645 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2646
2647 mutex_lock(&mvm->mutex);
2648 __iwl_mvm_remove_chanctx(mvm, ctx);
2649 mutex_unlock(&mvm->mutex);
2650 }
2651
2652 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2653 struct ieee80211_chanctx_conf *ctx,
2654 u32 changed)
2655 {
2656 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2657 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2658 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2659
2660 if (WARN_ONCE((phy_ctxt->ref > 1) &&
2661 (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2662 IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2663 IEEE80211_CHANCTX_CHANGE_RADAR |
2664 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2665 "Cannot change PHY. Ref=%d, changed=0x%X\n",
2666 phy_ctxt->ref, changed))
2667 return;
2668
2669 mutex_lock(&mvm->mutex);
2670 iwl_mvm_bt_coex_vif_change(mvm);
2671 iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2672 ctx->rx_chains_static,
2673 ctx->rx_chains_dynamic);
2674 mutex_unlock(&mvm->mutex);
2675 }
2676
2677 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2678 struct ieee80211_vif *vif,
2679 struct ieee80211_chanctx_conf *ctx,
2680 bool switching_chanctx)
2681 {
2682 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2683 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2684 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2685 int ret;
2686
2687 lockdep_assert_held(&mvm->mutex);
2688
2689 mvmvif->phy_ctxt = phy_ctxt;
2690
2691 switch (vif->type) {
2692 case NL80211_IFTYPE_AP:
2693 /* Unless it's a CSA flow we have nothing to do here */
2694 if (vif->csa_active) {
2695 mvmvif->ap_ibss_active = true;
2696 break;
2697 }
2698 case NL80211_IFTYPE_ADHOC:
2699 /*
2700 * The AP binding flow is handled as part of the start_ap flow
2701 * (in bss_info_changed), similarly for IBSS.
2702 */
2703 ret = 0;
2704 goto out;
2705 case NL80211_IFTYPE_STATION:
2706 case NL80211_IFTYPE_MONITOR:
2707 break;
2708 default:
2709 ret = -EINVAL;
2710 goto out;
2711 }
2712
2713 ret = iwl_mvm_binding_add_vif(mvm, vif);
2714 if (ret)
2715 goto out;
2716
2717 /*
2718 * Power state must be updated before quotas,
2719 * otherwise fw will complain.
2720 */
2721 iwl_mvm_power_update_mac(mvm);
2722
2723 /* Setting the quota at this stage is only required for monitor
2724 * interfaces. For the other types, the bss_info changed flow
2725 * will handle quota settings.
2726 */
2727 if (vif->type == NL80211_IFTYPE_MONITOR) {
2728 mvmvif->monitor_active = true;
2729 ret = iwl_mvm_update_quotas(mvm, NULL);
2730 if (ret)
2731 goto out_remove_binding;
2732 }
2733
2734 /* Handle binding during CSA */
2735 if ((vif->type == NL80211_IFTYPE_AP) ||
2736 (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2737 iwl_mvm_update_quotas(mvm, NULL);
2738 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2739 }
2740
2741 goto out;
2742
2743 out_remove_binding:
2744 iwl_mvm_binding_remove_vif(mvm, vif);
2745 iwl_mvm_power_update_mac(mvm);
2746 out:
2747 if (ret)
2748 mvmvif->phy_ctxt = NULL;
2749 return ret;
2750 }
2751 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2752 struct ieee80211_vif *vif,
2753 struct ieee80211_chanctx_conf *ctx)
2754 {
2755 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2756 int ret;
2757
2758 mutex_lock(&mvm->mutex);
2759 ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2760 mutex_unlock(&mvm->mutex);
2761
2762 return ret;
2763 }
2764
2765 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2766 struct ieee80211_vif *vif,
2767 struct ieee80211_chanctx_conf *ctx,
2768 bool switching_chanctx)
2769 {
2770 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2771 struct ieee80211_vif *disabled_vif = NULL;
2772
2773 lockdep_assert_held(&mvm->mutex);
2774
2775 iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2776
2777 switch (vif->type) {
2778 case NL80211_IFTYPE_ADHOC:
2779 goto out;
2780 case NL80211_IFTYPE_MONITOR:
2781 mvmvif->monitor_active = false;
2782 break;
2783 case NL80211_IFTYPE_AP:
2784 /* This part is triggered only during CSA */
2785 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2786 goto out;
2787
2788 /* Set CS bit on all the stations */
2789 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2790
2791 /* Save blocked iface, the timeout is set on the next beacon */
2792 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2793
2794 mvmvif->ap_ibss_active = false;
2795 break;
2796 case NL80211_IFTYPE_STATION:
2797 if (!switching_chanctx)
2798 break;
2799
2800 disabled_vif = vif;
2801
2802 iwl_mvm_mac_ctxt_changed(mvm, vif, true);
2803 break;
2804 default:
2805 break;
2806 }
2807
2808 iwl_mvm_update_quotas(mvm, disabled_vif);
2809 iwl_mvm_binding_remove_vif(mvm, vif);
2810
2811 out:
2812 mvmvif->phy_ctxt = NULL;
2813 iwl_mvm_power_update_mac(mvm);
2814 }
2815
2816 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2817 struct ieee80211_vif *vif,
2818 struct ieee80211_chanctx_conf *ctx)
2819 {
2820 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2821
2822 mutex_lock(&mvm->mutex);
2823 __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2824 mutex_unlock(&mvm->mutex);
2825 }
2826
2827 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2828 struct ieee80211_vif_chanctx_switch *vifs,
2829 int n_vifs,
2830 enum ieee80211_chanctx_switch_mode mode)
2831 {
2832 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2833 int ret;
2834
2835 /* we only support SWAP_CONTEXTS and with a single-vif right now */
2836 if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2837 return -EOPNOTSUPP;
2838
2839 mutex_lock(&mvm->mutex);
2840 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2841 __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2842
2843 ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2844 if (ret) {
2845 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2846 goto out_reassign;
2847 }
2848
2849 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2850 true);
2851 if (ret) {
2852 IWL_ERR(mvm,
2853 "failed to assign new_ctx during channel switch\n");
2854 goto out_remove;
2855 }
2856
2857 /* we don't support TDLS during DCM - can be caused by channel switch */
2858 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2859 iwl_mvm_teardown_tdls_peers(mvm);
2860
2861 goto out;
2862
2863 out_remove:
2864 __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2865
2866 out_reassign:
2867 ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2868 if (ret) {
2869 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2870 goto out_restart;
2871 }
2872
2873 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2874 true);
2875 if (ret) {
2876 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2877 goto out_restart;
2878 }
2879
2880 goto out;
2881
2882 out_restart:
2883 /* things keep failing, better restart the hw */
2884 iwl_mvm_nic_restart(mvm, false);
2885
2886 out:
2887 mutex_unlock(&mvm->mutex);
2888 return ret;
2889 }
2890
2891 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2892 struct ieee80211_sta *sta,
2893 bool set)
2894 {
2895 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2896 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2897
2898 if (!mvm_sta || !mvm_sta->vif) {
2899 IWL_ERR(mvm, "Station is not associated to a vif\n");
2900 return -EINVAL;
2901 }
2902
2903 return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2904 }
2905
2906 #ifdef CONFIG_NL80211_TESTMODE
2907 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2908 [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2909 [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2910 [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2911 };
2912
2913 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2914 struct ieee80211_vif *vif,
2915 void *data, int len)
2916 {
2917 struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2918 int err;
2919 u32 noa_duration;
2920
2921 err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2922 if (err)
2923 return err;
2924
2925 if (!tb[IWL_MVM_TM_ATTR_CMD])
2926 return -EINVAL;
2927
2928 switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2929 case IWL_MVM_TM_CMD_SET_NOA:
2930 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2931 !vif->bss_conf.enable_beacon ||
2932 !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2933 return -EINVAL;
2934
2935 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2936 if (noa_duration >= vif->bss_conf.beacon_int)
2937 return -EINVAL;
2938
2939 mvm->noa_duration = noa_duration;
2940 mvm->noa_vif = vif;
2941
2942 return iwl_mvm_update_quotas(mvm, NULL);
2943 case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2944 /* must be associated client vif - ignore authorized */
2945 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2946 !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2947 !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2948 return -EINVAL;
2949
2950 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2951 return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2952 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2953 }
2954
2955 return -EOPNOTSUPP;
2956 }
2957
2958 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2959 struct ieee80211_vif *vif,
2960 void *data, int len)
2961 {
2962 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2963 int err;
2964
2965 mutex_lock(&mvm->mutex);
2966 err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2967 mutex_unlock(&mvm->mutex);
2968
2969 return err;
2970 }
2971 #endif
2972
2973 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2974 struct ieee80211_vif *vif,
2975 struct cfg80211_chan_def *chandef)
2976 {
2977 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2978 struct ieee80211_vif *csa_vif;
2979
2980 mutex_lock(&mvm->mutex);
2981
2982 csa_vif = rcu_dereference_protected(mvm->csa_vif,
2983 lockdep_is_held(&mvm->mutex));
2984 if (WARN(csa_vif && csa_vif->csa_active,
2985 "Another CSA is already in progress"))
2986 goto out_unlock;
2987
2988 IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2989 chandef->center_freq1);
2990 rcu_assign_pointer(mvm->csa_vif, vif);
2991
2992 out_unlock:
2993 mutex_unlock(&mvm->mutex);
2994 }
2995
2996 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2997 struct ieee80211_vif *vif, u32 queues, bool drop)
2998 {
2999 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3000 struct iwl_mvm_vif *mvmvif;
3001 struct iwl_mvm_sta *mvmsta;
3002
3003 if (!vif || vif->type != NL80211_IFTYPE_STATION)
3004 return;
3005
3006 mutex_lock(&mvm->mutex);
3007 mvmvif = iwl_mvm_vif_from_mac80211(vif);
3008 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
3009
3010 if (WARN_ON_ONCE(!mvmsta))
3011 goto done;
3012
3013 if (drop) {
3014 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
3015 IWL_ERR(mvm, "flush request fail\n");
3016 } else {
3017 iwl_trans_wait_tx_queue_empty(mvm->trans,
3018 mvmsta->tfd_queue_msk);
3019 }
3020 done:
3021 mutex_unlock(&mvm->mutex);
3022 }
3023
3024 const struct ieee80211_ops iwl_mvm_hw_ops = {
3025 .tx = iwl_mvm_mac_tx,
3026 .ampdu_action = iwl_mvm_mac_ampdu_action,
3027 .start = iwl_mvm_mac_start,
3028 .restart_complete = iwl_mvm_mac_restart_complete,
3029 .stop = iwl_mvm_mac_stop,
3030 .add_interface = iwl_mvm_mac_add_interface,
3031 .remove_interface = iwl_mvm_mac_remove_interface,
3032 .config = iwl_mvm_mac_config,
3033 .prepare_multicast = iwl_mvm_prepare_multicast,
3034 .configure_filter = iwl_mvm_configure_filter,
3035 .bss_info_changed = iwl_mvm_bss_info_changed,
3036 .hw_scan = iwl_mvm_mac_hw_scan,
3037 .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3038 .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3039 .sta_state = iwl_mvm_mac_sta_state,
3040 .sta_notify = iwl_mvm_mac_sta_notify,
3041 .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3042 .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3043 .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3044 .sta_rc_update = iwl_mvm_sta_rc_update,
3045 .conf_tx = iwl_mvm_mac_conf_tx,
3046 .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3047 .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3048 .flush = iwl_mvm_mac_flush,
3049 .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3050 .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3051 .set_key = iwl_mvm_mac_set_key,
3052 .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3053 .remain_on_channel = iwl_mvm_roc,
3054 .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3055 .add_chanctx = iwl_mvm_add_chanctx,
3056 .remove_chanctx = iwl_mvm_remove_chanctx,
3057 .change_chanctx = iwl_mvm_change_chanctx,
3058 .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3059 .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3060 .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3061
3062 .start_ap = iwl_mvm_start_ap_ibss,
3063 .stop_ap = iwl_mvm_stop_ap_ibss,
3064 .join_ibss = iwl_mvm_start_ap_ibss,
3065 .leave_ibss = iwl_mvm_stop_ap_ibss,
3066
3067 .set_tim = iwl_mvm_set_tim,
3068
3069 .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
3070
3071 CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3072
3073 #ifdef CONFIG_PM_SLEEP
3074 /* look at d3.c */
3075 .suspend = iwl_mvm_suspend,
3076 .resume = iwl_mvm_resume,
3077 .set_wakeup = iwl_mvm_set_wakeup,
3078 .set_rekey_data = iwl_mvm_set_rekey_data,
3079 #if IS_ENABLED(CONFIG_IPV6)
3080 .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3081 #endif
3082 .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3083 #endif
3084 };
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