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iwlwifi: mvm: add CSA absent time event for clients
[mirror_ubuntu-bionic-kernel.git] / drivers / net / wireless / iwlwifi / mvm / mac80211.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of version 2 of the GNU General Public License as
13 * published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
23 * USA
24 *
25 * The full GNU General Public License is included in this distribution
26 * in the file called COPYING.
27 *
28 * Contact Information:
29 * Intel Linux Wireless <ilw@linux.intel.com>
30 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
31 *
32 * BSD LICENSE
33 *
34 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
35 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH
36 * All rights reserved.
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions
40 * are met:
41 *
42 * * Redistributions of source code must retain the above copyright
43 * notice, this list of conditions and the following disclaimer.
44 * * Redistributions in binary form must reproduce the above copyright
45 * notice, this list of conditions and the following disclaimer in
46 * the documentation and/or other materials provided with the
47 * distribution.
48 * * Neither the name Intel Corporation nor the names of its
49 * contributors may be used to endorse or promote products derived
50 * from this software without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
53 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
54 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
55 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
56 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
57 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
58 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
59 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
60 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
61 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
62 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
63 *
64 *****************************************************************************/
65 #include <linux/kernel.h>
66 #include <linux/slab.h>
67 #include <linux/skbuff.h>
68 #include <linux/netdevice.h>
69 #include <linux/etherdevice.h>
70 #include <linux/ip.h>
71 #include <linux/if_arp.h>
72 #include <linux/devcoredump.h>
73 #include <net/mac80211.h>
74 #include <net/ieee80211_radiotap.h>
75 #include <net/tcp.h>
76
77 #include "iwl-op-mode.h"
78 #include "iwl-io.h"
79 #include "mvm.h"
80 #include "sta.h"
81 #include "time-event.h"
82 #include "iwl-eeprom-parse.h"
83 #include "fw-api-scan.h"
84 #include "iwl-phy-db.h"
85 #include "testmode.h"
86 #include "iwl-fw-error-dump.h"
87 #include "iwl-prph.h"
88
89 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
90 {
91 .max = 1,
92 .types = BIT(NL80211_IFTYPE_STATION),
93 },
94 {
95 .max = 1,
96 .types = BIT(NL80211_IFTYPE_AP) |
97 BIT(NL80211_IFTYPE_P2P_CLIENT) |
98 BIT(NL80211_IFTYPE_P2P_GO),
99 },
100 {
101 .max = 1,
102 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
103 },
104 };
105
106 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
107 {
108 .num_different_channels = 1,
109 .max_interfaces = 3,
110 .limits = iwl_mvm_limits,
111 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
112 },
113 };
114
115 #ifdef CONFIG_PM_SLEEP
116 static const struct nl80211_wowlan_tcp_data_token_feature
117 iwl_mvm_wowlan_tcp_token_feature = {
118 .min_len = 0,
119 .max_len = 255,
120 .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
121 };
122
123 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
124 .tok = &iwl_mvm_wowlan_tcp_token_feature,
125 .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
126 sizeof(struct ethhdr) -
127 sizeof(struct iphdr) -
128 sizeof(struct tcphdr),
129 .data_interval_max = 65535, /* __le16 in API */
130 .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
131 sizeof(struct ethhdr) -
132 sizeof(struct iphdr) -
133 sizeof(struct tcphdr),
134 .seq = true,
135 };
136 #endif
137
138 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
139 /*
140 * Use the reserved field to indicate magic values.
141 * these values will only be used internally by the driver,
142 * and won't make it to the fw (reserved will be 0).
143 * BC_FILTER_MAGIC_IP - configure the val of this attribute to
144 * be the vif's ip address. in case there is not a single
145 * ip address (0, or more than 1), this attribute will
146 * be skipped.
147 * BC_FILTER_MAGIC_MAC - set the val of this attribute to
148 * the LSB bytes of the vif's mac address
149 */
150 enum {
151 BC_FILTER_MAGIC_NONE = 0,
152 BC_FILTER_MAGIC_IP,
153 BC_FILTER_MAGIC_MAC,
154 };
155
156 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
157 {
158 /* arp */
159 .discard = 0,
160 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
161 .attrs = {
162 {
163 /* frame type - arp, hw type - ethernet */
164 .offset_type =
165 BCAST_FILTER_OFFSET_PAYLOAD_START,
166 .offset = sizeof(rfc1042_header),
167 .val = cpu_to_be32(0x08060001),
168 .mask = cpu_to_be32(0xffffffff),
169 },
170 {
171 /* arp dest ip */
172 .offset_type =
173 BCAST_FILTER_OFFSET_PAYLOAD_START,
174 .offset = sizeof(rfc1042_header) + 2 +
175 sizeof(struct arphdr) +
176 ETH_ALEN + sizeof(__be32) +
177 ETH_ALEN,
178 .mask = cpu_to_be32(0xffffffff),
179 /* mark it as special field */
180 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
181 },
182 },
183 },
184 {
185 /* dhcp offer bcast */
186 .discard = 0,
187 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
188 .attrs = {
189 {
190 /* udp dest port - 68 (bootp client)*/
191 .offset_type = BCAST_FILTER_OFFSET_IP_END,
192 .offset = offsetof(struct udphdr, dest),
193 .val = cpu_to_be32(0x00440000),
194 .mask = cpu_to_be32(0xffff0000),
195 },
196 {
197 /* dhcp - lsb bytes of client hw address */
198 .offset_type = BCAST_FILTER_OFFSET_IP_END,
199 .offset = 38,
200 .mask = cpu_to_be32(0xffffffff),
201 /* mark it as special field */
202 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
203 },
204 },
205 },
206 /* last filter must be empty */
207 {},
208 };
209 #endif
210
211 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
212 {
213 if (!iwl_mvm_is_d0i3_supported(mvm))
214 return;
215
216 IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
217 spin_lock_bh(&mvm->refs_lock);
218 mvm->refs[ref_type]++;
219 spin_unlock_bh(&mvm->refs_lock);
220 iwl_trans_ref(mvm->trans);
221 }
222
223 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
224 {
225 if (!iwl_mvm_is_d0i3_supported(mvm))
226 return;
227
228 IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
229 spin_lock_bh(&mvm->refs_lock);
230 WARN_ON(!mvm->refs[ref_type]--);
231 spin_unlock_bh(&mvm->refs_lock);
232 iwl_trans_unref(mvm->trans);
233 }
234
235 static void iwl_mvm_unref_all_except(struct iwl_mvm *mvm,
236 enum iwl_mvm_ref_type except_ref)
237 {
238 int i, j;
239
240 if (!iwl_mvm_is_d0i3_supported(mvm))
241 return;
242
243 spin_lock_bh(&mvm->refs_lock);
244 for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
245 if (except_ref == i || !mvm->refs[i])
246 continue;
247
248 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d (%d)\n",
249 i, mvm->refs[i]);
250 for (j = 0; j < mvm->refs[i]; j++)
251 iwl_trans_unref(mvm->trans);
252 mvm->refs[i] = 0;
253 }
254 spin_unlock_bh(&mvm->refs_lock);
255 }
256
257 bool iwl_mvm_ref_taken(struct iwl_mvm *mvm)
258 {
259 int i;
260 bool taken = false;
261
262 if (!iwl_mvm_is_d0i3_supported(mvm))
263 return true;
264
265 spin_lock_bh(&mvm->refs_lock);
266 for (i = 0; i < IWL_MVM_REF_COUNT; i++) {
267 if (mvm->refs[i]) {
268 taken = true;
269 break;
270 }
271 }
272 spin_unlock_bh(&mvm->refs_lock);
273
274 return taken;
275 }
276
277 int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
278 {
279 iwl_mvm_ref(mvm, ref_type);
280
281 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
282 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
283 HZ)) {
284 WARN_ON_ONCE(1);
285 iwl_mvm_unref(mvm, ref_type);
286 return -EIO;
287 }
288
289 return 0;
290 }
291
292 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
293 {
294 int i;
295
296 memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
297 for (i = 0; i < NUM_PHY_CTX; i++) {
298 mvm->phy_ctxts[i].id = i;
299 mvm->phy_ctxts[i].ref = 0;
300 }
301 }
302
303 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
304 {
305 struct ieee80211_hw *hw = mvm->hw;
306 int num_mac, ret, i;
307
308 /* Tell mac80211 our characteristics */
309 hw->flags = IEEE80211_HW_SIGNAL_DBM |
310 IEEE80211_HW_SPECTRUM_MGMT |
311 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
312 IEEE80211_HW_QUEUE_CONTROL |
313 IEEE80211_HW_WANT_MONITOR_VIF |
314 IEEE80211_HW_SUPPORTS_PS |
315 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
316 IEEE80211_HW_AMPDU_AGGREGATION |
317 IEEE80211_HW_TIMING_BEACON_ONLY |
318 IEEE80211_HW_CONNECTION_MONITOR |
319 IEEE80211_HW_CHANCTX_STA_CSA |
320 IEEE80211_HW_SUPPORTS_CLONED_SKBS;
321
322 hw->queues = mvm->first_agg_queue;
323 hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
324 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
325 IEEE80211_RADIOTAP_MCS_HAVE_STBC;
326 hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
327 hw->rate_control_algorithm = "iwl-mvm-rs";
328
329 /*
330 * Enable 11w if advertised by firmware and software crypto
331 * is not enabled (as the firmware will interpret some mgmt
332 * packets, so enabling it with software crypto isn't safe)
333 */
334 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
335 !iwlwifi_mod_params.sw_crypto)
336 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
337
338 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
339 IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
340 !iwlwifi_mod_params.uapsd_disable) {
341 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
342 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
343 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
344 }
345
346 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
347 mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
348 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
349 hw->wiphy->features |=
350 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
351 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
352 }
353
354 hw->sta_data_size = sizeof(struct iwl_mvm_sta);
355 hw->vif_data_size = sizeof(struct iwl_mvm_vif);
356 hw->chanctx_data_size = sizeof(u16);
357
358 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
359 BIT(NL80211_IFTYPE_P2P_CLIENT) |
360 BIT(NL80211_IFTYPE_AP) |
361 BIT(NL80211_IFTYPE_P2P_GO) |
362 BIT(NL80211_IFTYPE_P2P_DEVICE) |
363 BIT(NL80211_IFTYPE_ADHOC);
364
365 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
366 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
367 REGULATORY_DISABLE_BEACON_HINTS;
368
369 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
370 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
371
372 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
373 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
374
375 hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
376 hw->wiphy->n_iface_combinations =
377 ARRAY_SIZE(iwl_mvm_iface_combinations);
378
379 hw->wiphy->max_remain_on_channel_duration = 10000;
380 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
381
382 /* Extract MAC address */
383 memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
384 hw->wiphy->addresses = mvm->addresses;
385 hw->wiphy->n_addresses = 1;
386
387 /* Extract additional MAC addresses if available */
388 num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
389 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
390
391 for (i = 1; i < num_mac; i++) {
392 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
393 ETH_ALEN);
394 mvm->addresses[i].addr[5]++;
395 hw->wiphy->n_addresses++;
396 }
397
398 iwl_mvm_reset_phy_ctxts(mvm);
399
400 hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
401
402 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
403
404 if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
405 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
406 &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
407 if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
408 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
409 &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
410
411 hw->wiphy->hw_version = mvm->trans->hw_id;
412
413 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
414 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
415 else
416 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
417
418 if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
419 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
420 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
421 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
422 /* we create the 802.11 header and zero length SSID IE. */
423 hw->wiphy->max_sched_scan_ie_len =
424 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
425 }
426
427 hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
428 NL80211_FEATURE_LOW_PRIORITY_SCAN |
429 NL80211_FEATURE_P2P_GO_OPPPS |
430 NL80211_FEATURE_DYNAMIC_SMPS |
431 NL80211_FEATURE_STATIC_SMPS |
432 NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
433
434 if (mvm->fw->ucode_capa.capa[0] &
435 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
436 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
437 if (mvm->fw->ucode_capa.capa[0] &
438 IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
439 hw->wiphy->features |= NL80211_FEATURE_QUIET;
440
441 if (mvm->fw->ucode_capa.capa[0] &
442 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
443 hw->wiphy->features |=
444 NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
445
446 if (mvm->fw->ucode_capa.capa[0] &
447 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
448 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
449
450 mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
451
452 /* currently FW API supports only one optional cipher scheme */
453 if (mvm->fw->cs[0].cipher) {
454 mvm->hw->n_cipher_schemes = 1;
455 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
456 }
457
458 #ifdef CONFIG_PM_SLEEP
459 if (iwl_mvm_is_d0i3_supported(mvm) &&
460 device_can_wakeup(mvm->trans->dev)) {
461 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
462 hw->wiphy->wowlan = &mvm->wowlan;
463 } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
464 mvm->trans->ops->d3_suspend &&
465 mvm->trans->ops->d3_resume &&
466 device_can_wakeup(mvm->trans->dev)) {
467 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
468 WIPHY_WOWLAN_DISCONNECT |
469 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
470 WIPHY_WOWLAN_RFKILL_RELEASE;
471 if (!iwlwifi_mod_params.sw_crypto)
472 mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
473 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
474 WIPHY_WOWLAN_4WAY_HANDSHAKE;
475
476 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
477 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
478 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
479 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
480 hw->wiphy->wowlan = &mvm->wowlan;
481 }
482 #endif
483
484 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
485 /* assign default bcast filtering configuration */
486 mvm->bcast_filters = iwl_mvm_default_bcast_filters;
487 #endif
488
489 ret = iwl_mvm_leds_init(mvm);
490 if (ret)
491 return ret;
492
493 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
494 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
495 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
496 }
497
498 if (mvm->fw->ucode_capa.capa[0] &
499 IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
500 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
501 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
502 }
503
504 ret = ieee80211_register_hw(mvm->hw);
505 if (ret)
506 iwl_mvm_leds_exit(mvm);
507
508 return ret;
509 }
510
511 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
512 struct ieee80211_sta *sta,
513 struct sk_buff *skb)
514 {
515 struct iwl_mvm_sta *mvmsta;
516 bool defer = false;
517
518 /*
519 * double check the IN_D0I3 flag both before and after
520 * taking the spinlock, in order to prevent taking
521 * the spinlock when not needed.
522 */
523 if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
524 return false;
525
526 spin_lock(&mvm->d0i3_tx_lock);
527 /*
528 * testing the flag again ensures the skb dequeue
529 * loop (on d0i3 exit) hasn't run yet.
530 */
531 if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
532 goto out;
533
534 mvmsta = iwl_mvm_sta_from_mac80211(sta);
535 if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
536 mvmsta->sta_id != mvm->d0i3_ap_sta_id)
537 goto out;
538
539 __skb_queue_tail(&mvm->d0i3_tx, skb);
540 ieee80211_stop_queues(mvm->hw);
541
542 /* trigger wakeup */
543 iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
544 iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
545
546 defer = true;
547 out:
548 spin_unlock(&mvm->d0i3_tx_lock);
549 return defer;
550 }
551
552 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
553 struct ieee80211_tx_control *control,
554 struct sk_buff *skb)
555 {
556 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
557 struct ieee80211_sta *sta = control->sta;
558 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
559 struct ieee80211_hdr *hdr = (void *)skb->data;
560
561 if (iwl_mvm_is_radio_killed(mvm)) {
562 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
563 goto drop;
564 }
565
566 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
567 !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
568 !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
569 goto drop;
570
571 /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
572 if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
573 ieee80211_is_mgmt(hdr->frame_control) &&
574 !ieee80211_is_deauth(hdr->frame_control) &&
575 !ieee80211_is_disassoc(hdr->frame_control) &&
576 !ieee80211_is_action(hdr->frame_control)))
577 sta = NULL;
578
579 if (sta) {
580 if (iwl_mvm_defer_tx(mvm, sta, skb))
581 return;
582 if (iwl_mvm_tx_skb(mvm, skb, sta))
583 goto drop;
584 return;
585 }
586
587 if (iwl_mvm_tx_skb_non_sta(mvm, skb))
588 goto drop;
589 return;
590 drop:
591 ieee80211_free_txskb(hw, skb);
592 }
593
594 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
595 {
596 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
597 return false;
598 return true;
599 }
600
601 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
602 {
603 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
604 return false;
605 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
606 return true;
607
608 /* enabled by default */
609 return true;
610 }
611
612 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
613 struct ieee80211_vif *vif,
614 enum ieee80211_ampdu_mlme_action action,
615 struct ieee80211_sta *sta, u16 tid,
616 u16 *ssn, u8 buf_size)
617 {
618 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
619 int ret;
620 bool tx_agg_ref = false;
621
622 IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
623 sta->addr, tid, action);
624
625 if (!(mvm->nvm_data->sku_cap_11n_enable))
626 return -EACCES;
627
628 /* return from D0i3 before starting a new Tx aggregation */
629 switch (action) {
630 case IEEE80211_AMPDU_TX_START:
631 case IEEE80211_AMPDU_TX_STOP_CONT:
632 case IEEE80211_AMPDU_TX_STOP_FLUSH:
633 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
634 case IEEE80211_AMPDU_TX_OPERATIONAL:
635 /*
636 * for tx start, wait synchronously until D0i3 exit to
637 * get the correct sequence number for the tid.
638 * additionally, some other ampdu actions use direct
639 * target access, which is not handled automatically
640 * by the trans layer (unlike commands), so wait for
641 * d0i3 exit in these cases as well.
642 */
643 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
644 if (ret)
645 return ret;
646
647 tx_agg_ref = true;
648 break;
649 default:
650 break;
651 }
652
653 mutex_lock(&mvm->mutex);
654
655 switch (action) {
656 case IEEE80211_AMPDU_RX_START:
657 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
658 ret = -EINVAL;
659 break;
660 }
661 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
662 break;
663 case IEEE80211_AMPDU_RX_STOP:
664 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
665 break;
666 case IEEE80211_AMPDU_TX_START:
667 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
668 ret = -EINVAL;
669 break;
670 }
671 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
672 break;
673 case IEEE80211_AMPDU_TX_STOP_CONT:
674 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
675 break;
676 case IEEE80211_AMPDU_TX_STOP_FLUSH:
677 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
678 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
679 break;
680 case IEEE80211_AMPDU_TX_OPERATIONAL:
681 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
682 break;
683 default:
684 WARN_ON_ONCE(1);
685 ret = -EINVAL;
686 break;
687 }
688 mutex_unlock(&mvm->mutex);
689
690 /*
691 * If the tid is marked as started, we won't use it for offloaded
692 * traffic on the next D0i3 entry. It's safe to unref.
693 */
694 if (tx_agg_ref)
695 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
696
697 return ret;
698 }
699
700 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
701 struct ieee80211_vif *vif)
702 {
703 struct iwl_mvm *mvm = data;
704 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
705
706 mvmvif->uploaded = false;
707 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
708
709 /* does this make sense at all? */
710 mvmvif->color++;
711
712 spin_lock_bh(&mvm->time_event_lock);
713 iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
714 spin_unlock_bh(&mvm->time_event_lock);
715
716 mvmvif->phy_ctxt = NULL;
717 memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
718 }
719
720 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
721 const void *data, size_t datalen)
722 {
723 const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
724 ssize_t bytes_read;
725 ssize_t bytes_read_trans;
726
727 if (offset < dump_ptrs->op_mode_len) {
728 bytes_read = min_t(ssize_t, count,
729 dump_ptrs->op_mode_len - offset);
730 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
731 bytes_read);
732 offset += bytes_read;
733 count -= bytes_read;
734
735 if (count == 0)
736 return bytes_read;
737 } else {
738 bytes_read = 0;
739 }
740
741 if (!dump_ptrs->trans_ptr)
742 return bytes_read;
743
744 offset -= dump_ptrs->op_mode_len;
745 bytes_read_trans = min_t(ssize_t, count,
746 dump_ptrs->trans_ptr->len - offset);
747 memcpy(buffer + bytes_read,
748 (u8 *)dump_ptrs->trans_ptr->data + offset,
749 bytes_read_trans);
750
751 return bytes_read + bytes_read_trans;
752 }
753
754 static void iwl_mvm_free_coredump(const void *data)
755 {
756 const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
757
758 vfree(fw_error_dump->op_mode_ptr);
759 vfree(fw_error_dump->trans_ptr);
760 kfree(fw_error_dump);
761 }
762
763 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
764 {
765 struct iwl_fw_error_dump_file *dump_file;
766 struct iwl_fw_error_dump_data *dump_data;
767 struct iwl_fw_error_dump_info *dump_info;
768 struct iwl_mvm_dump_ptrs *fw_error_dump;
769 const struct fw_img *img;
770 u32 sram_len, sram_ofs;
771 u32 file_len, rxf_len;
772 unsigned long flags;
773 int reg_val;
774
775 lockdep_assert_held(&mvm->mutex);
776
777 fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
778 if (!fw_error_dump)
779 return;
780
781 img = &mvm->fw->img[mvm->cur_ucode];
782 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
783 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
784
785 /* reading buffer size */
786 reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
787 rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
788
789 /* the register holds the value divided by 128 */
790 rxf_len = rxf_len << 7;
791
792 file_len = sizeof(*dump_file) +
793 sizeof(*dump_data) * 3 +
794 sram_len +
795 rxf_len +
796 sizeof(*dump_info);
797
798 dump_file = vzalloc(file_len);
799 if (!dump_file) {
800 kfree(fw_error_dump);
801 return;
802 }
803
804 fw_error_dump->op_mode_ptr = dump_file;
805
806 dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
807 dump_data = (void *)dump_file->data;
808
809 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
810 dump_data->len = cpu_to_le32(sizeof(*dump_info));
811 dump_info = (void *) dump_data->data;
812 dump_info->device_family =
813 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
814 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
815 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
816 memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
817 sizeof(dump_info->fw_human_readable));
818 strncpy(dump_info->dev_human_readable, mvm->cfg->name,
819 sizeof(dump_info->dev_human_readable));
820 strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
821 sizeof(dump_info->bus_human_readable));
822
823 dump_data = iwl_fw_error_next_data(dump_data);
824 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
825 dump_data->len = cpu_to_le32(rxf_len);
826
827 if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
828 u32 *rxf = (void *)dump_data->data;
829 int i;
830
831 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
832 iwl_trans_write_prph(mvm->trans,
833 RXF_LD_FENCE_OFFSET_ADDR,
834 i * sizeof(u32));
835 rxf[i] = iwl_trans_read_prph(mvm->trans,
836 RXF_FIFO_RD_FENCE_ADDR);
837 }
838 iwl_trans_release_nic_access(mvm->trans, &flags);
839 }
840
841 dump_data = iwl_fw_error_next_data(dump_data);
842 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
843 dump_data->len = cpu_to_le32(sram_len);
844 iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
845 sram_len);
846
847 fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
848 fw_error_dump->op_mode_len = file_len;
849 if (fw_error_dump->trans_ptr)
850 file_len += fw_error_dump->trans_ptr->len;
851 dump_file->file_len = cpu_to_le32(file_len);
852
853 dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
854 GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
855 }
856
857 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
858 {
859 /* clear the D3 reconfig, we only need it to avoid dumping a
860 * firmware coredump on reconfiguration, we shouldn't do that
861 * on D3->D0 transition
862 */
863 if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
864 iwl_mvm_fw_error_dump(mvm);
865
866 iwl_trans_stop_device(mvm->trans);
867
868 mvm->scan_status = IWL_MVM_SCAN_NONE;
869 mvm->ps_disabled = false;
870 mvm->calibrating = false;
871
872 /* just in case one was running */
873 ieee80211_remain_on_channel_expired(mvm->hw);
874
875 ieee80211_iterate_active_interfaces_atomic(
876 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
877 iwl_mvm_cleanup_iterator, mvm);
878
879 mvm->p2p_device_vif = NULL;
880 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
881
882 iwl_mvm_reset_phy_ctxts(mvm);
883 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
884 memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
885 memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
886 memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
887 memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
888 memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
889 memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
890 memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
891 memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
892
893 ieee80211_wake_queues(mvm->hw);
894
895 /* cleanup all stale references (scan, roc), but keep the
896 * ucode_down ref until reconfig is complete */
897 iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
898
899 /* clear any stale d0i3 state */
900 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
901
902 mvm->vif_count = 0;
903 mvm->rx_ba_sessions = 0;
904 }
905
906 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
907 {
908 int ret;
909
910 lockdep_assert_held(&mvm->mutex);
911
912 /* Clean up some internal and mac80211 state on restart */
913 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
914 iwl_mvm_restart_cleanup(mvm);
915
916 ret = iwl_mvm_up(mvm);
917
918 if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
919 /* Something went wrong - we need to finish some cleanup
920 * that normally iwl_mvm_mac_restart_complete() below
921 * would do.
922 */
923 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
924 iwl_mvm_d0i3_enable_tx(mvm, NULL);
925 }
926
927 return ret;
928 }
929
930 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
931 {
932 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
933 int ret;
934
935 mutex_lock(&mvm->mutex);
936 ret = __iwl_mvm_mac_start(mvm);
937 mutex_unlock(&mvm->mutex);
938
939 return ret;
940 }
941
942 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
943 {
944 int ret;
945
946 mutex_lock(&mvm->mutex);
947
948 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
949 iwl_mvm_d0i3_enable_tx(mvm, NULL);
950 ret = iwl_mvm_update_quotas(mvm, NULL);
951 if (ret)
952 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
953 ret);
954
955 /* allow transport/FW low power modes */
956 iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
957
958 /*
959 * If we have TDLS peers, remove them. We don't know the last seqno/PN
960 * of packets the FW sent out, so we must reconnect.
961 */
962 iwl_mvm_teardown_tdls_peers(mvm);
963
964 mutex_unlock(&mvm->mutex);
965 }
966
967 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
968 {
969 bool exit_now;
970
971 if (!iwl_mvm_is_d0i3_supported(mvm))
972 return;
973
974 mutex_lock(&mvm->d0i3_suspend_mutex);
975 __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
976 exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
977 &mvm->d0i3_suspend_flags);
978 mutex_unlock(&mvm->d0i3_suspend_mutex);
979
980 if (exit_now) {
981 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
982 _iwl_mvm_exit_d0i3(mvm);
983 }
984 }
985
986 static void
987 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
988 enum ieee80211_reconfig_type reconfig_type)
989 {
990 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
991
992 switch (reconfig_type) {
993 case IEEE80211_RECONFIG_TYPE_RESTART:
994 iwl_mvm_restart_complete(mvm);
995 break;
996 case IEEE80211_RECONFIG_TYPE_SUSPEND:
997 iwl_mvm_resume_complete(mvm);
998 break;
999 }
1000 }
1001
1002 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1003 {
1004 lockdep_assert_held(&mvm->mutex);
1005
1006 /* disallow low power states when the FW is down */
1007 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1008
1009 /* async_handlers_wk is now blocked */
1010
1011 /*
1012 * The work item could be running or queued if the
1013 * ROC time event stops just as we get here.
1014 */
1015 cancel_work_sync(&mvm->roc_done_wk);
1016
1017 iwl_trans_stop_device(mvm->trans);
1018
1019 iwl_mvm_async_handlers_purge(mvm);
1020 /* async_handlers_list is empty and will stay empty: HW is stopped */
1021
1022 /* the fw is stopped, the aux sta is dead: clean up driver state */
1023 iwl_mvm_del_aux_sta(mvm);
1024
1025 mvm->ucode_loaded = false;
1026 }
1027
1028 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1029 {
1030 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1031
1032 flush_work(&mvm->d0i3_exit_work);
1033 flush_work(&mvm->async_handlers_wk);
1034 flush_work(&mvm->fw_error_dump_wk);
1035
1036 mutex_lock(&mvm->mutex);
1037 __iwl_mvm_mac_stop(mvm);
1038 mutex_unlock(&mvm->mutex);
1039
1040 /*
1041 * The worker might have been waiting for the mutex, let it run and
1042 * discover that its list is now empty.
1043 */
1044 cancel_work_sync(&mvm->async_handlers_wk);
1045 }
1046
1047 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1048 {
1049 u16 i;
1050
1051 lockdep_assert_held(&mvm->mutex);
1052
1053 for (i = 0; i < NUM_PHY_CTX; i++)
1054 if (!mvm->phy_ctxts[i].ref)
1055 return &mvm->phy_ctxts[i];
1056
1057 IWL_ERR(mvm, "No available PHY context\n");
1058 return NULL;
1059 }
1060
1061 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1062 s8 tx_power)
1063 {
1064 /* FW is in charge of regulatory enforcement */
1065 struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1066 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1067 .pwr_restriction = cpu_to_le16(tx_power),
1068 };
1069
1070 return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1071 sizeof(reduce_txpwr_cmd),
1072 &reduce_txpwr_cmd);
1073 }
1074
1075 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1076 struct ieee80211_vif *vif)
1077 {
1078 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1079 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1080 int ret;
1081
1082 /*
1083 * make sure D0i3 exit is completed, otherwise a target access
1084 * during tx queue configuration could be done when still in
1085 * D0i3 state.
1086 */
1087 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1088 if (ret)
1089 return ret;
1090
1091 /*
1092 * Not much to do here. The stack will not allow interface
1093 * types or combinations that we didn't advertise, so we
1094 * don't really have to check the types.
1095 */
1096
1097 mutex_lock(&mvm->mutex);
1098
1099 /* Allocate resources for the MAC context, and add it to the fw */
1100 ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1101 if (ret)
1102 goto out_unlock;
1103
1104 /* Counting number of interfaces is needed for legacy PM */
1105 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1106 mvm->vif_count++;
1107
1108 /*
1109 * The AP binding flow can be done only after the beacon
1110 * template is configured (which happens only in the mac80211
1111 * start_ap() flow), and adding the broadcast station can happen
1112 * only after the binding.
1113 * In addition, since modifying the MAC before adding a bcast
1114 * station is not allowed by the FW, delay the adding of MAC context to
1115 * the point where we can also add the bcast station.
1116 * In short: there's not much we can do at this point, other than
1117 * allocating resources :)
1118 */
1119 if (vif->type == NL80211_IFTYPE_AP ||
1120 vif->type == NL80211_IFTYPE_ADHOC) {
1121 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1122 if (ret) {
1123 IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1124 goto out_release;
1125 }
1126
1127 iwl_mvm_vif_dbgfs_register(mvm, vif);
1128 goto out_unlock;
1129 }
1130
1131 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1132 if (ret)
1133 goto out_release;
1134
1135 ret = iwl_mvm_power_update_mac(mvm);
1136 if (ret)
1137 goto out_release;
1138
1139 /* beacon filtering */
1140 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1141 if (ret)
1142 goto out_remove_mac;
1143
1144 if (!mvm->bf_allowed_vif &&
1145 vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1146 mvm->bf_allowed_vif = mvmvif;
1147 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1148 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1149 }
1150
1151 /*
1152 * P2P_DEVICE interface does not have a channel context assigned to it,
1153 * so a dedicated PHY context is allocated to it and the corresponding
1154 * MAC context is bound to it at this stage.
1155 */
1156 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1157
1158 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1159 if (!mvmvif->phy_ctxt) {
1160 ret = -ENOSPC;
1161 goto out_free_bf;
1162 }
1163
1164 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1165 ret = iwl_mvm_binding_add_vif(mvm, vif);
1166 if (ret)
1167 goto out_unref_phy;
1168
1169 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1170 if (ret)
1171 goto out_unbind;
1172
1173 /* Save a pointer to p2p device vif, so it can later be used to
1174 * update the p2p device MAC when a GO is started/stopped */
1175 mvm->p2p_device_vif = vif;
1176 }
1177
1178 iwl_mvm_vif_dbgfs_register(mvm, vif);
1179 goto out_unlock;
1180
1181 out_unbind:
1182 iwl_mvm_binding_remove_vif(mvm, vif);
1183 out_unref_phy:
1184 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1185 out_free_bf:
1186 if (mvm->bf_allowed_vif == mvmvif) {
1187 mvm->bf_allowed_vif = NULL;
1188 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1189 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1190 }
1191 out_remove_mac:
1192 mvmvif->phy_ctxt = NULL;
1193 iwl_mvm_mac_ctxt_remove(mvm, vif);
1194 out_release:
1195 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1196 mvm->vif_count--;
1197
1198 iwl_mvm_mac_ctxt_release(mvm, vif);
1199 out_unlock:
1200 mutex_unlock(&mvm->mutex);
1201
1202 iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1203
1204 return ret;
1205 }
1206
1207 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1208 struct ieee80211_vif *vif)
1209 {
1210 u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1211
1212 if (tfd_msk) {
1213 mutex_lock(&mvm->mutex);
1214 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1215 mutex_unlock(&mvm->mutex);
1216 }
1217
1218 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1219 /*
1220 * Flush the ROC worker which will flush the OFFCHANNEL queue.
1221 * We assume here that all the packets sent to the OFFCHANNEL
1222 * queue are sent in ROC session.
1223 */
1224 flush_work(&mvm->roc_done_wk);
1225 } else {
1226 /*
1227 * By now, all the AC queues are empty. The AGG queues are
1228 * empty too. We already got all the Tx responses for all the
1229 * packets in the queues. The drain work can have been
1230 * triggered. Flush it.
1231 */
1232 flush_work(&mvm->sta_drained_wk);
1233 }
1234 }
1235
1236 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1237 struct ieee80211_vif *vif)
1238 {
1239 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1240 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1241
1242 iwl_mvm_prepare_mac_removal(mvm, vif);
1243
1244 mutex_lock(&mvm->mutex);
1245
1246 if (mvm->bf_allowed_vif == mvmvif) {
1247 mvm->bf_allowed_vif = NULL;
1248 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1249 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1250 }
1251
1252 iwl_mvm_vif_dbgfs_clean(mvm, vif);
1253
1254 /*
1255 * For AP/GO interface, the tear down of the resources allocated to the
1256 * interface is be handled as part of the stop_ap flow.
1257 */
1258 if (vif->type == NL80211_IFTYPE_AP ||
1259 vif->type == NL80211_IFTYPE_ADHOC) {
1260 #ifdef CONFIG_NL80211_TESTMODE
1261 if (vif == mvm->noa_vif) {
1262 mvm->noa_vif = NULL;
1263 mvm->noa_duration = 0;
1264 }
1265 #endif
1266 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1267 goto out_release;
1268 }
1269
1270 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1271 mvm->p2p_device_vif = NULL;
1272 iwl_mvm_rm_bcast_sta(mvm, vif);
1273 iwl_mvm_binding_remove_vif(mvm, vif);
1274 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1275 mvmvif->phy_ctxt = NULL;
1276 }
1277
1278 if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1279 mvm->vif_count--;
1280
1281 iwl_mvm_power_update_mac(mvm);
1282 iwl_mvm_mac_ctxt_remove(mvm, vif);
1283
1284 out_release:
1285 iwl_mvm_mac_ctxt_release(mvm, vif);
1286 mutex_unlock(&mvm->mutex);
1287 }
1288
1289 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1290 {
1291 return 0;
1292 }
1293
1294 struct iwl_mvm_mc_iter_data {
1295 struct iwl_mvm *mvm;
1296 int port_id;
1297 };
1298
1299 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1300 struct ieee80211_vif *vif)
1301 {
1302 struct iwl_mvm_mc_iter_data *data = _data;
1303 struct iwl_mvm *mvm = data->mvm;
1304 struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1305 int ret, len;
1306
1307 /* if we don't have free ports, mcast frames will be dropped */
1308 if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1309 return;
1310
1311 if (vif->type != NL80211_IFTYPE_STATION ||
1312 !vif->bss_conf.assoc)
1313 return;
1314
1315 cmd->port_id = data->port_id++;
1316 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1317 len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1318
1319 ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1320 if (ret)
1321 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1322 }
1323
1324 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1325 {
1326 struct iwl_mvm_mc_iter_data iter_data = {
1327 .mvm = mvm,
1328 };
1329
1330 lockdep_assert_held(&mvm->mutex);
1331
1332 if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1333 return;
1334
1335 ieee80211_iterate_active_interfaces_atomic(
1336 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1337 iwl_mvm_mc_iface_iterator, &iter_data);
1338 }
1339
1340 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1341 struct netdev_hw_addr_list *mc_list)
1342 {
1343 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1344 struct iwl_mcast_filter_cmd *cmd;
1345 struct netdev_hw_addr *addr;
1346 int addr_count;
1347 bool pass_all;
1348 int len;
1349
1350 addr_count = netdev_hw_addr_list_count(mc_list);
1351 pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1352 IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1353 if (pass_all)
1354 addr_count = 0;
1355
1356 len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1357 cmd = kzalloc(len, GFP_ATOMIC);
1358 if (!cmd)
1359 return 0;
1360
1361 if (pass_all) {
1362 cmd->pass_all = 1;
1363 return (u64)(unsigned long)cmd;
1364 }
1365
1366 netdev_hw_addr_list_for_each(addr, mc_list) {
1367 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1368 cmd->count, addr->addr);
1369 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1370 addr->addr, ETH_ALEN);
1371 cmd->count++;
1372 }
1373
1374 return (u64)(unsigned long)cmd;
1375 }
1376
1377 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1378 unsigned int changed_flags,
1379 unsigned int *total_flags,
1380 u64 multicast)
1381 {
1382 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1383 struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1384
1385 mutex_lock(&mvm->mutex);
1386
1387 /* replace previous configuration */
1388 kfree(mvm->mcast_filter_cmd);
1389 mvm->mcast_filter_cmd = cmd;
1390
1391 if (!cmd)
1392 goto out;
1393
1394 iwl_mvm_recalc_multicast(mvm);
1395 out:
1396 mutex_unlock(&mvm->mutex);
1397 *total_flags = 0;
1398 }
1399
1400 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1401 struct iwl_bcast_iter_data {
1402 struct iwl_mvm *mvm;
1403 struct iwl_bcast_filter_cmd *cmd;
1404 u8 current_filter;
1405 };
1406
1407 static void
1408 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1409 const struct iwl_fw_bcast_filter *in_filter,
1410 struct iwl_fw_bcast_filter *out_filter)
1411 {
1412 struct iwl_fw_bcast_filter_attr *attr;
1413 int i;
1414
1415 memcpy(out_filter, in_filter, sizeof(*out_filter));
1416
1417 for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1418 attr = &out_filter->attrs[i];
1419
1420 if (!attr->mask)
1421 break;
1422
1423 switch (attr->reserved1) {
1424 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1425 if (vif->bss_conf.arp_addr_cnt != 1) {
1426 attr->mask = 0;
1427 continue;
1428 }
1429
1430 attr->val = vif->bss_conf.arp_addr_list[0];
1431 break;
1432 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1433 attr->val = *(__be32 *)&vif->addr[2];
1434 break;
1435 default:
1436 break;
1437 }
1438 attr->reserved1 = 0;
1439 out_filter->num_attrs++;
1440 }
1441 }
1442
1443 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1444 struct ieee80211_vif *vif)
1445 {
1446 struct iwl_bcast_iter_data *data = _data;
1447 struct iwl_mvm *mvm = data->mvm;
1448 struct iwl_bcast_filter_cmd *cmd = data->cmd;
1449 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1450 struct iwl_fw_bcast_mac *bcast_mac;
1451 int i;
1452
1453 if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1454 return;
1455
1456 bcast_mac = &cmd->macs[mvmvif->id];
1457
1458 /*
1459 * enable filtering only for associated stations, but not for P2P
1460 * Clients
1461 */
1462 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1463 !vif->bss_conf.assoc)
1464 return;
1465
1466 bcast_mac->default_discard = 1;
1467
1468 /* copy all configured filters */
1469 for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1470 /*
1471 * Make sure we don't exceed our filters limit.
1472 * if there is still a valid filter to be configured,
1473 * be on the safe side and just allow bcast for this mac.
1474 */
1475 if (WARN_ON_ONCE(data->current_filter >=
1476 ARRAY_SIZE(cmd->filters))) {
1477 bcast_mac->default_discard = 0;
1478 bcast_mac->attached_filters = 0;
1479 break;
1480 }
1481
1482 iwl_mvm_set_bcast_filter(vif,
1483 &mvm->bcast_filters[i],
1484 &cmd->filters[data->current_filter]);
1485
1486 /* skip current filter if it contains no attributes */
1487 if (!cmd->filters[data->current_filter].num_attrs)
1488 continue;
1489
1490 /* attach the filter to current mac */
1491 bcast_mac->attached_filters |=
1492 cpu_to_le16(BIT(data->current_filter));
1493
1494 data->current_filter++;
1495 }
1496 }
1497
1498 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1499 struct iwl_bcast_filter_cmd *cmd)
1500 {
1501 struct iwl_bcast_iter_data iter_data = {
1502 .mvm = mvm,
1503 .cmd = cmd,
1504 };
1505
1506 if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1507 return false;
1508
1509 memset(cmd, 0, sizeof(*cmd));
1510 cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1511 cmd->max_macs = ARRAY_SIZE(cmd->macs);
1512
1513 #ifdef CONFIG_IWLWIFI_DEBUGFS
1514 /* use debugfs filters/macs if override is configured */
1515 if (mvm->dbgfs_bcast_filtering.override) {
1516 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1517 sizeof(cmd->filters));
1518 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1519 sizeof(cmd->macs));
1520 return true;
1521 }
1522 #endif
1523
1524 /* if no filters are configured, do nothing */
1525 if (!mvm->bcast_filters)
1526 return false;
1527
1528 /* configure and attach these filters for each associated sta vif */
1529 ieee80211_iterate_active_interfaces(
1530 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1531 iwl_mvm_bcast_filter_iterator, &iter_data);
1532
1533 return true;
1534 }
1535 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1536 struct ieee80211_vif *vif)
1537 {
1538 struct iwl_bcast_filter_cmd cmd;
1539
1540 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1541 return 0;
1542
1543 if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1544 return 0;
1545
1546 return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1547 sizeof(cmd), &cmd);
1548 }
1549 #else
1550 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1551 struct ieee80211_vif *vif)
1552 {
1553 return 0;
1554 }
1555 #endif
1556
1557 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1558 struct ieee80211_vif *vif,
1559 struct ieee80211_bss_conf *bss_conf,
1560 u32 changes)
1561 {
1562 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1563 int ret;
1564
1565 /*
1566 * Re-calculate the tsf id, as the master-slave relations depend on the
1567 * beacon interval, which was not known when the station interface was
1568 * added.
1569 */
1570 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1571 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1572
1573 /*
1574 * If we're not associated yet, take the (new) BSSID before associating
1575 * so the firmware knows. If we're already associated, then use the old
1576 * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1577 * branch for disassociation below.
1578 */
1579 if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1580 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1581
1582 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1583 if (ret)
1584 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1585
1586 /* after sending it once, adopt mac80211 data */
1587 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1588 mvmvif->associated = bss_conf->assoc;
1589
1590 if (changes & BSS_CHANGED_ASSOC) {
1591 if (bss_conf->assoc) {
1592 /* add quota for this interface */
1593 ret = iwl_mvm_update_quotas(mvm, NULL);
1594 if (ret) {
1595 IWL_ERR(mvm, "failed to update quotas\n");
1596 return;
1597 }
1598
1599 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1600 &mvm->status)) {
1601 /*
1602 * If we're restarting then the firmware will
1603 * obviously have lost synchronisation with
1604 * the AP. It will attempt to synchronise by
1605 * itself, but we can make it more reliable by
1606 * scheduling a session protection time event.
1607 *
1608 * The firmware needs to receive a beacon to
1609 * catch up with synchronisation, use 110% of
1610 * the beacon interval.
1611 *
1612 * Set a large maximum delay to allow for more
1613 * than a single interface.
1614 */
1615 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1616 iwl_mvm_protect_session(mvm, vif, dur, dur,
1617 5 * dur, false);
1618 }
1619
1620 iwl_mvm_sf_update(mvm, vif, false);
1621 iwl_mvm_power_vif_assoc(mvm, vif);
1622 if (vif->p2p) {
1623 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1624 iwl_mvm_update_smps(mvm, vif,
1625 IWL_MVM_SMPS_REQ_PROT,
1626 IEEE80211_SMPS_DYNAMIC);
1627 }
1628 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1629 /*
1630 * If update fails - SF might be running in associated
1631 * mode while disassociated - which is forbidden.
1632 */
1633 WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1634 "Failed to update SF upon disassociation\n");
1635
1636 /* remove AP station now that the MAC is unassoc */
1637 ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1638 if (ret)
1639 IWL_ERR(mvm, "failed to remove AP station\n");
1640
1641 if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1642 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1643 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1644 /* remove quota for this interface */
1645 ret = iwl_mvm_update_quotas(mvm, NULL);
1646 if (ret)
1647 IWL_ERR(mvm, "failed to update quotas\n");
1648
1649 if (vif->p2p)
1650 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1651
1652 /* this will take the cleared BSSID from bss_conf */
1653 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1654 if (ret)
1655 IWL_ERR(mvm,
1656 "failed to update MAC %pM (clear after unassoc)\n",
1657 vif->addr);
1658 }
1659
1660 iwl_mvm_recalc_multicast(mvm);
1661 iwl_mvm_configure_bcast_filter(mvm, vif);
1662
1663 /* reset rssi values */
1664 mvmvif->bf_data.ave_beacon_signal = 0;
1665
1666 iwl_mvm_bt_coex_vif_change(mvm);
1667 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1668 IEEE80211_SMPS_AUTOMATIC);
1669 } else if (changes & BSS_CHANGED_BEACON_INFO) {
1670 /*
1671 * We received a beacon _after_ association so
1672 * remove the session protection.
1673 */
1674 iwl_mvm_remove_time_event(mvm, mvmvif,
1675 &mvmvif->time_event_data);
1676 }
1677
1678 if (changes & BSS_CHANGED_BEACON_INFO) {
1679 iwl_mvm_sf_update(mvm, vif, false);
1680 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1681 }
1682
1683 if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1684 ret = iwl_mvm_power_update_mac(mvm);
1685 if (ret)
1686 IWL_ERR(mvm, "failed to update power mode\n");
1687 }
1688
1689 if (changes & BSS_CHANGED_TXPOWER) {
1690 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1691 bss_conf->txpower);
1692 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1693 }
1694
1695 if (changes & BSS_CHANGED_CQM) {
1696 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1697 /* reset cqm events tracking */
1698 mvmvif->bf_data.last_cqm_event = 0;
1699 if (mvmvif->bf_data.bf_enabled) {
1700 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1701 if (ret)
1702 IWL_ERR(mvm,
1703 "failed to update CQM thresholds\n");
1704 }
1705 }
1706
1707 if (changes & BSS_CHANGED_ARP_FILTER) {
1708 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1709 iwl_mvm_configure_bcast_filter(mvm, vif);
1710 }
1711 }
1712
1713 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1714 struct ieee80211_vif *vif)
1715 {
1716 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1717 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1718 int ret;
1719
1720 /*
1721 * iwl_mvm_mac_ctxt_add() might read directly from the device
1722 * (the system time), so make sure it is available.
1723 */
1724 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1725 if (ret)
1726 return ret;
1727
1728 mutex_lock(&mvm->mutex);
1729
1730 /* Send the beacon template */
1731 ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1732 if (ret)
1733 goto out_unlock;
1734
1735 /*
1736 * Re-calculate the tsf id, as the master-slave relations depend on the
1737 * beacon interval, which was not known when the AP interface was added.
1738 */
1739 if (vif->type == NL80211_IFTYPE_AP)
1740 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1741
1742 /* Add the mac context */
1743 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1744 if (ret)
1745 goto out_unlock;
1746
1747 /* Perform the binding */
1748 ret = iwl_mvm_binding_add_vif(mvm, vif);
1749 if (ret)
1750 goto out_remove;
1751
1752 /* Send the bcast station. At this stage the TBTT and DTIM time events
1753 * are added and applied to the scheduler */
1754 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1755 if (ret)
1756 goto out_unbind;
1757
1758 /* must be set before quota calculations */
1759 mvmvif->ap_ibss_active = true;
1760
1761 /* power updated needs to be done before quotas */
1762 iwl_mvm_power_update_mac(mvm);
1763
1764 ret = iwl_mvm_update_quotas(mvm, NULL);
1765 if (ret)
1766 goto out_quota_failed;
1767
1768 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1769 if (vif->p2p && mvm->p2p_device_vif)
1770 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1771
1772 iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1773
1774 iwl_mvm_bt_coex_vif_change(mvm);
1775
1776 /* we don't support TDLS during DCM */
1777 if (iwl_mvm_phy_ctx_count(mvm) > 1)
1778 iwl_mvm_teardown_tdls_peers(mvm);
1779
1780 mutex_unlock(&mvm->mutex);
1781 return 0;
1782
1783 out_quota_failed:
1784 iwl_mvm_power_update_mac(mvm);
1785 mvmvif->ap_ibss_active = false;
1786 iwl_mvm_send_rm_bcast_sta(mvm, vif);
1787 out_unbind:
1788 iwl_mvm_binding_remove_vif(mvm, vif);
1789 out_remove:
1790 iwl_mvm_mac_ctxt_remove(mvm, vif);
1791 out_unlock:
1792 mutex_unlock(&mvm->mutex);
1793 iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1794 return ret;
1795 }
1796
1797 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1798 struct ieee80211_vif *vif)
1799 {
1800 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1801 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1802
1803 iwl_mvm_prepare_mac_removal(mvm, vif);
1804
1805 mutex_lock(&mvm->mutex);
1806
1807 /* Handle AP stop while in CSA */
1808 if (rcu_access_pointer(mvm->csa_vif) == vif) {
1809 iwl_mvm_remove_time_event(mvm, mvmvif,
1810 &mvmvif->time_event_data);
1811 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1812 }
1813
1814 if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1815 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1816 mvm->csa_tx_block_bcn_timeout = 0;
1817 }
1818
1819 mvmvif->ap_ibss_active = false;
1820 mvm->ap_last_beacon_gp2 = 0;
1821
1822 iwl_mvm_bt_coex_vif_change(mvm);
1823
1824 iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1825
1826 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1827 if (vif->p2p && mvm->p2p_device_vif)
1828 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1829
1830 iwl_mvm_update_quotas(mvm, NULL);
1831 iwl_mvm_send_rm_bcast_sta(mvm, vif);
1832 iwl_mvm_binding_remove_vif(mvm, vif);
1833
1834 iwl_mvm_power_update_mac(mvm);
1835
1836 iwl_mvm_mac_ctxt_remove(mvm, vif);
1837
1838 mutex_unlock(&mvm->mutex);
1839 }
1840
1841 static void
1842 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1843 struct ieee80211_vif *vif,
1844 struct ieee80211_bss_conf *bss_conf,
1845 u32 changes)
1846 {
1847 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1848
1849 /* Changes will be applied when the AP/IBSS is started */
1850 if (!mvmvif->ap_ibss_active)
1851 return;
1852
1853 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1854 BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1855 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1856 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1857
1858 /* Need to send a new beacon template to the FW */
1859 if (changes & BSS_CHANGED_BEACON &&
1860 iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1861 IWL_WARN(mvm, "Failed updating beacon data\n");
1862
1863 if (changes & BSS_CHANGED_TXPOWER) {
1864 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1865 bss_conf->txpower);
1866 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1867 }
1868
1869 }
1870
1871 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1872 struct ieee80211_vif *vif,
1873 struct ieee80211_bss_conf *bss_conf,
1874 u32 changes)
1875 {
1876 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1877
1878 /*
1879 * iwl_mvm_bss_info_changed_station() might call
1880 * iwl_mvm_protect_session(), which reads directly from
1881 * the device (the system time), so make sure it is available.
1882 */
1883 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1884 return;
1885
1886 mutex_lock(&mvm->mutex);
1887
1888 if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1889 iwl_mvm_scan_offload_stop(mvm, true);
1890
1891 switch (vif->type) {
1892 case NL80211_IFTYPE_STATION:
1893 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1894 break;
1895 case NL80211_IFTYPE_AP:
1896 case NL80211_IFTYPE_ADHOC:
1897 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1898 break;
1899 default:
1900 /* shouldn't happen */
1901 WARN_ON_ONCE(1);
1902 }
1903
1904 mutex_unlock(&mvm->mutex);
1905 iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1906 }
1907
1908 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1909 enum iwl_scan_status scan_type)
1910 {
1911 int ret;
1912 bool wait_for_handlers = false;
1913
1914 mutex_lock(&mvm->mutex);
1915
1916 if (mvm->scan_status != scan_type) {
1917 ret = 0;
1918 /* make sure there are no pending notifications */
1919 wait_for_handlers = true;
1920 goto out;
1921 }
1922
1923 switch (scan_type) {
1924 case IWL_MVM_SCAN_SCHED:
1925 ret = iwl_mvm_scan_offload_stop(mvm, true);
1926 break;
1927 case IWL_MVM_SCAN_OS:
1928 ret = iwl_mvm_cancel_scan(mvm);
1929 break;
1930 case IWL_MVM_SCAN_NONE:
1931 default:
1932 WARN_ON_ONCE(1);
1933 ret = -EINVAL;
1934 break;
1935 }
1936 if (ret)
1937 goto out;
1938
1939 wait_for_handlers = true;
1940 out:
1941 mutex_unlock(&mvm->mutex);
1942
1943 /* make sure we consume the completion notification */
1944 if (wait_for_handlers)
1945 iwl_mvm_wait_for_async_handlers(mvm);
1946
1947 return ret;
1948 }
1949 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1950 struct ieee80211_vif *vif,
1951 struct ieee80211_scan_request *hw_req)
1952 {
1953 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1954 struct cfg80211_scan_request *req = &hw_req->req;
1955 int ret;
1956
1957 if (req->n_channels == 0 ||
1958 req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1959 return -EINVAL;
1960
1961 if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1962 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1963 if (ret)
1964 return ret;
1965 }
1966
1967 mutex_lock(&mvm->mutex);
1968
1969 if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1970 ret = -EBUSY;
1971 goto out;
1972 }
1973
1974 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1975
1976 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1977 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1978 else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1979 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1980 else
1981 ret = iwl_mvm_scan_request(mvm, vif, req);
1982
1983 if (ret)
1984 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1985 out:
1986 mutex_unlock(&mvm->mutex);
1987 return ret;
1988 }
1989
1990 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1991 struct ieee80211_vif *vif)
1992 {
1993 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1994
1995 mutex_lock(&mvm->mutex);
1996
1997 iwl_mvm_cancel_scan(mvm);
1998
1999 mutex_unlock(&mvm->mutex);
2000 }
2001
2002 static void
2003 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2004 struct ieee80211_sta *sta, u16 tids,
2005 int num_frames,
2006 enum ieee80211_frame_release_type reason,
2007 bool more_data)
2008 {
2009 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2010
2011 /* Called when we need to transmit (a) frame(s) from mac80211 */
2012
2013 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2014 tids, more_data, false);
2015 }
2016
2017 static void
2018 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2019 struct ieee80211_sta *sta, u16 tids,
2020 int num_frames,
2021 enum ieee80211_frame_release_type reason,
2022 bool more_data)
2023 {
2024 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2025
2026 /* Called when we need to transmit (a) frame(s) from agg queue */
2027
2028 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2029 tids, more_data, true);
2030 }
2031
2032 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2033 struct ieee80211_vif *vif,
2034 enum sta_notify_cmd cmd,
2035 struct ieee80211_sta *sta)
2036 {
2037 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2038 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2039 int tid;
2040
2041 switch (cmd) {
2042 case STA_NOTIFY_SLEEP:
2043 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2044 ieee80211_sta_block_awake(hw, sta, true);
2045 spin_lock_bh(&mvmsta->lock);
2046 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2047 struct iwl_mvm_tid_data *tid_data;
2048
2049 tid_data = &mvmsta->tid_data[tid];
2050 if (tid_data->state != IWL_AGG_ON &&
2051 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2052 continue;
2053 if (iwl_mvm_tid_queued(tid_data) == 0)
2054 continue;
2055 ieee80211_sta_set_buffered(sta, tid, true);
2056 }
2057 spin_unlock_bh(&mvmsta->lock);
2058 /*
2059 * The fw updates the STA to be asleep. Tx packets on the Tx
2060 * queues to this station will not be transmitted. The fw will
2061 * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2062 */
2063 break;
2064 case STA_NOTIFY_AWAKE:
2065 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2066 break;
2067 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2068 break;
2069 default:
2070 break;
2071 }
2072 }
2073
2074 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2075 struct ieee80211_vif *vif,
2076 struct ieee80211_sta *sta)
2077 {
2078 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2079 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2080
2081 /*
2082 * This is called before mac80211 does RCU synchronisation,
2083 * so here we already invalidate our internal RCU-protected
2084 * station pointer. The rest of the code will thus no longer
2085 * be able to find the station this way, and we don't rely
2086 * on further RCU synchronisation after the sta_state()
2087 * callback deleted the station.
2088 */
2089 mutex_lock(&mvm->mutex);
2090 if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2091 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2092 ERR_PTR(-ENOENT));
2093 mutex_unlock(&mvm->mutex);
2094 }
2095
2096 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2097 struct ieee80211_vif *vif,
2098 struct ieee80211_sta *sta,
2099 enum ieee80211_sta_state old_state,
2100 enum ieee80211_sta_state new_state)
2101 {
2102 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2103 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2104 int ret;
2105
2106 IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2107 sta->addr, old_state, new_state);
2108
2109 /* this would be a mac80211 bug ... but don't crash */
2110 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2111 return -EINVAL;
2112
2113 /* if a STA is being removed, reuse its ID */
2114 flush_work(&mvm->sta_drained_wk);
2115
2116 mutex_lock(&mvm->mutex);
2117 if (old_state == IEEE80211_STA_NOTEXIST &&
2118 new_state == IEEE80211_STA_NONE) {
2119 /*
2120 * Firmware bug - it'll crash if the beacon interval is less
2121 * than 16. We can't avoid connecting at all, so refuse the
2122 * station state change, this will cause mac80211 to abandon
2123 * attempts to connect to this AP, and eventually wpa_s will
2124 * blacklist the AP...
2125 */
2126 if (vif->type == NL80211_IFTYPE_STATION &&
2127 vif->bss_conf.beacon_int < 16) {
2128 IWL_ERR(mvm,
2129 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2130 sta->addr, vif->bss_conf.beacon_int);
2131 ret = -EINVAL;
2132 goto out_unlock;
2133 }
2134
2135 if (sta->tdls &&
2136 (vif->p2p ||
2137 iwl_mvm_tdls_sta_count(mvm, NULL) ==
2138 IWL_MVM_TDLS_STA_COUNT ||
2139 iwl_mvm_phy_ctx_count(mvm) > 1)) {
2140 IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2141 ret = -EBUSY;
2142 goto out_unlock;
2143 }
2144
2145 ret = iwl_mvm_add_sta(mvm, vif, sta);
2146 if (sta->tdls && ret == 0)
2147 iwl_mvm_recalc_tdls_state(mvm, vif, true);
2148 } else if (old_state == IEEE80211_STA_NONE &&
2149 new_state == IEEE80211_STA_AUTH) {
2150 /*
2151 * EBS may be disabled due to previous failures reported by FW.
2152 * Reset EBS status here assuming environment has been changed.
2153 */
2154 mvm->last_ebs_successful = true;
2155 ret = 0;
2156 } else if (old_state == IEEE80211_STA_AUTH &&
2157 new_state == IEEE80211_STA_ASSOC) {
2158 ret = iwl_mvm_update_sta(mvm, vif, sta);
2159 if (ret == 0)
2160 iwl_mvm_rs_rate_init(mvm, sta,
2161 mvmvif->phy_ctxt->channel->band,
2162 true);
2163 } else if (old_state == IEEE80211_STA_ASSOC &&
2164 new_state == IEEE80211_STA_AUTHORIZED) {
2165
2166 /* we don't support TDLS during DCM */
2167 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2168 iwl_mvm_teardown_tdls_peers(mvm);
2169
2170 /* enable beacon filtering */
2171 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2172 ret = 0;
2173 } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2174 new_state == IEEE80211_STA_ASSOC) {
2175 /* disable beacon filtering */
2176 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2177 ret = 0;
2178 } else if (old_state == IEEE80211_STA_ASSOC &&
2179 new_state == IEEE80211_STA_AUTH) {
2180 ret = 0;
2181 } else if (old_state == IEEE80211_STA_AUTH &&
2182 new_state == IEEE80211_STA_NONE) {
2183 ret = 0;
2184 } else if (old_state == IEEE80211_STA_NONE &&
2185 new_state == IEEE80211_STA_NOTEXIST) {
2186 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2187 if (sta->tdls)
2188 iwl_mvm_recalc_tdls_state(mvm, vif, false);
2189 } else {
2190 ret = -EIO;
2191 }
2192 out_unlock:
2193 mutex_unlock(&mvm->mutex);
2194
2195 if (sta->tdls && ret == 0) {
2196 if (old_state == IEEE80211_STA_NOTEXIST &&
2197 new_state == IEEE80211_STA_NONE)
2198 ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2199 else if (old_state == IEEE80211_STA_NONE &&
2200 new_state == IEEE80211_STA_NOTEXIST)
2201 ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2202 }
2203
2204 return ret;
2205 }
2206
2207 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2208 {
2209 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2210
2211 mvm->rts_threshold = value;
2212
2213 return 0;
2214 }
2215
2216 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2217 struct ieee80211_vif *vif,
2218 struct ieee80211_sta *sta, u32 changed)
2219 {
2220 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2221
2222 if (vif->type == NL80211_IFTYPE_STATION &&
2223 changed & IEEE80211_RC_NSS_CHANGED)
2224 iwl_mvm_sf_update(mvm, vif, false);
2225 }
2226
2227 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2228 struct ieee80211_vif *vif, u16 ac,
2229 const struct ieee80211_tx_queue_params *params)
2230 {
2231 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2232 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2233
2234 mvmvif->queue_params[ac] = *params;
2235
2236 /*
2237 * No need to update right away, we'll get BSS_CHANGED_QOS
2238 * The exception is P2P_DEVICE interface which needs immediate update.
2239 */
2240 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2241 int ret;
2242
2243 mutex_lock(&mvm->mutex);
2244 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2245 mutex_unlock(&mvm->mutex);
2246 return ret;
2247 }
2248 return 0;
2249 }
2250
2251 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2252 struct ieee80211_vif *vif)
2253 {
2254 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2255 u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2256 200 + vif->bss_conf.beacon_int);
2257 u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2258 100 + vif->bss_conf.beacon_int);
2259
2260 if (WARN_ON_ONCE(vif->bss_conf.assoc))
2261 return;
2262
2263 /*
2264 * iwl_mvm_protect_session() reads directly from the device
2265 * (the system time), so make sure it is available.
2266 */
2267 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2268 return;
2269
2270 mutex_lock(&mvm->mutex);
2271 /* Try really hard to protect the session and hear a beacon */
2272 iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2273 mutex_unlock(&mvm->mutex);
2274
2275 iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2276 }
2277
2278 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2279 struct ieee80211_vif *vif,
2280 struct cfg80211_sched_scan_request *req,
2281 struct ieee80211_scan_ies *ies)
2282 {
2283 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2284 int ret;
2285
2286 if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2287 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2288 if (ret)
2289 return ret;
2290 }
2291
2292 mutex_lock(&mvm->mutex);
2293
2294 /* Newest FW fixes sched scan while connected on another interface */
2295 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2296 if (!vif->bss_conf.idle) {
2297 ret = -EBUSY;
2298 goto out;
2299 }
2300 } else if (!iwl_mvm_is_idle(mvm)) {
2301 ret = -EBUSY;
2302 goto out;
2303 }
2304
2305 if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2306 ret = -EBUSY;
2307 goto out;
2308 }
2309
2310 ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2311 if (ret)
2312 mvm->scan_status = IWL_MVM_SCAN_NONE;
2313
2314 out:
2315 mutex_unlock(&mvm->mutex);
2316 return ret;
2317 }
2318
2319 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2320 struct ieee80211_vif *vif)
2321 {
2322 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2323 int ret;
2324
2325 mutex_lock(&mvm->mutex);
2326 ret = iwl_mvm_scan_offload_stop(mvm, false);
2327 mutex_unlock(&mvm->mutex);
2328 iwl_mvm_wait_for_async_handlers(mvm);
2329
2330 return ret;
2331
2332 }
2333
2334 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2335 enum set_key_cmd cmd,
2336 struct ieee80211_vif *vif,
2337 struct ieee80211_sta *sta,
2338 struct ieee80211_key_conf *key)
2339 {
2340 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2341 int ret;
2342
2343 if (iwlwifi_mod_params.sw_crypto) {
2344 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2345 return -EOPNOTSUPP;
2346 }
2347
2348 switch (key->cipher) {
2349 case WLAN_CIPHER_SUITE_TKIP:
2350 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2351 /* fall-through */
2352 case WLAN_CIPHER_SUITE_CCMP:
2353 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2354 break;
2355 case WLAN_CIPHER_SUITE_AES_CMAC:
2356 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2357 break;
2358 case WLAN_CIPHER_SUITE_WEP40:
2359 case WLAN_CIPHER_SUITE_WEP104:
2360 /* For non-client mode, only use WEP keys for TX as we probably
2361 * don't have a station yet anyway and would then have to keep
2362 * track of the keys, linking them to each of the clients/peers
2363 * as they appear. For now, don't do that, for performance WEP
2364 * offload doesn't really matter much, but we need it for some
2365 * other offload features in client mode.
2366 */
2367 if (vif->type != NL80211_IFTYPE_STATION)
2368 return 0;
2369 break;
2370 default:
2371 /* currently FW supports only one optional cipher scheme */
2372 if (hw->n_cipher_schemes &&
2373 hw->cipher_schemes->cipher == key->cipher)
2374 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2375 else
2376 return -EOPNOTSUPP;
2377 }
2378
2379 mutex_lock(&mvm->mutex);
2380
2381 switch (cmd) {
2382 case SET_KEY:
2383 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2384 vif->type == NL80211_IFTYPE_AP) && !sta) {
2385 /*
2386 * GTK on AP interface is a TX-only key, return 0;
2387 * on IBSS they're per-station and because we're lazy
2388 * we don't support them for RX, so do the same.
2389 */
2390 ret = 0;
2391 key->hw_key_idx = STA_KEY_IDX_INVALID;
2392 break;
2393 }
2394
2395 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2396 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2397 if (ret) {
2398 IWL_WARN(mvm, "set key failed\n");
2399 /*
2400 * can't add key for RX, but we don't need it
2401 * in the device for TX so still return 0
2402 */
2403 key->hw_key_idx = STA_KEY_IDX_INVALID;
2404 ret = 0;
2405 }
2406
2407 break;
2408 case DISABLE_KEY:
2409 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2410 ret = 0;
2411 break;
2412 }
2413
2414 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2415 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2416 break;
2417 default:
2418 ret = -EINVAL;
2419 }
2420
2421 mutex_unlock(&mvm->mutex);
2422 return ret;
2423 }
2424
2425 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2426 struct ieee80211_vif *vif,
2427 struct ieee80211_key_conf *keyconf,
2428 struct ieee80211_sta *sta,
2429 u32 iv32, u16 *phase1key)
2430 {
2431 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2432
2433 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2434 return;
2435
2436 iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2437 }
2438
2439
2440 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2441 struct iwl_rx_packet *pkt, void *data)
2442 {
2443 struct iwl_mvm *mvm =
2444 container_of(notif_wait, struct iwl_mvm, notif_wait);
2445 struct iwl_hs20_roc_res *resp;
2446 int resp_len = iwl_rx_packet_payload_len(pkt);
2447 struct iwl_mvm_time_event_data *te_data = data;
2448
2449 if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2450 return true;
2451
2452 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2453 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2454 return true;
2455 }
2456
2457 resp = (void *)pkt->data;
2458
2459 IWL_DEBUG_TE(mvm,
2460 "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2461 resp->status, resp->event_unique_id);
2462
2463 te_data->uid = le32_to_cpu(resp->event_unique_id);
2464 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2465 te_data->uid);
2466
2467 spin_lock_bh(&mvm->time_event_lock);
2468 list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2469 spin_unlock_bh(&mvm->time_event_lock);
2470
2471 return true;
2472 }
2473
2474 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2475 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2476 struct ieee80211_channel *channel,
2477 struct ieee80211_vif *vif,
2478 int duration)
2479 {
2480 int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2481 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2482 struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2483 static const u8 time_event_response[] = { HOT_SPOT_CMD };
2484 struct iwl_notification_wait wait_time_event;
2485 struct iwl_hs20_roc_req aux_roc_req = {
2486 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2487 .id_and_color =
2488 cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2489 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2490 /* Set the channel info data */
2491 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2492 PHY_BAND_24 : PHY_BAND_5,
2493 .channel_info.channel = channel->hw_value,
2494 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2495 /* Set the time and duration */
2496 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2497 .apply_time_max_delay =
2498 cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2499 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2500 };
2501
2502 /* Set the node address */
2503 memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2504
2505 lockdep_assert_held(&mvm->mutex);
2506
2507 spin_lock_bh(&mvm->time_event_lock);
2508
2509 if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2510 spin_unlock_bh(&mvm->time_event_lock);
2511 return -EIO;
2512 }
2513
2514 te_data->vif = vif;
2515 te_data->duration = duration;
2516 te_data->id = HOT_SPOT_CMD;
2517
2518 spin_unlock_bh(&mvm->time_event_lock);
2519
2520 /*
2521 * Use a notification wait, which really just processes the
2522 * command response and doesn't wait for anything, in order
2523 * to be able to process the response and get the UID inside
2524 * the RX path. Using CMD_WANT_SKB doesn't work because it
2525 * stores the buffer and then wakes up this thread, by which
2526 * time another notification (that the time event started)
2527 * might already be processed unsuccessfully.
2528 */
2529 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2530 time_event_response,
2531 ARRAY_SIZE(time_event_response),
2532 iwl_mvm_rx_aux_roc, te_data);
2533
2534 res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2535 &aux_roc_req);
2536
2537 if (res) {
2538 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2539 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2540 goto out_clear_te;
2541 }
2542
2543 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2544 res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2545 /* should never fail */
2546 WARN_ON_ONCE(res);
2547
2548 if (res) {
2549 out_clear_te:
2550 spin_lock_bh(&mvm->time_event_lock);
2551 iwl_mvm_te_clear_data(mvm, te_data);
2552 spin_unlock_bh(&mvm->time_event_lock);
2553 }
2554
2555 return res;
2556 }
2557
2558 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2559 struct ieee80211_vif *vif,
2560 struct ieee80211_channel *channel,
2561 int duration,
2562 enum ieee80211_roc_type type)
2563 {
2564 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2565 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2566 struct cfg80211_chan_def chandef;
2567 struct iwl_mvm_phy_ctxt *phy_ctxt;
2568 int ret, i;
2569
2570 IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2571 duration, type);
2572
2573 mutex_lock(&mvm->mutex);
2574
2575 switch (vif->type) {
2576 case NL80211_IFTYPE_STATION:
2577 /* Use aux roc framework (HS20) */
2578 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2579 vif, duration);
2580 goto out_unlock;
2581 case NL80211_IFTYPE_P2P_DEVICE:
2582 /* handle below */
2583 break;
2584 default:
2585 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2586 ret = -EINVAL;
2587 goto out_unlock;
2588 }
2589
2590 for (i = 0; i < NUM_PHY_CTX; i++) {
2591 phy_ctxt = &mvm->phy_ctxts[i];
2592 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2593 continue;
2594
2595 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2596 /*
2597 * Unbind the P2P_DEVICE from the current PHY context,
2598 * and if the PHY context is not used remove it.
2599 */
2600 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2601 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2602 goto out_unlock;
2603
2604 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2605
2606 /* Bind the P2P_DEVICE to the current PHY Context */
2607 mvmvif->phy_ctxt = phy_ctxt;
2608
2609 ret = iwl_mvm_binding_add_vif(mvm, vif);
2610 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2611 goto out_unlock;
2612
2613 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2614 goto schedule_time_event;
2615 }
2616 }
2617
2618 /* Need to update the PHY context only if the ROC channel changed */
2619 if (channel == mvmvif->phy_ctxt->channel)
2620 goto schedule_time_event;
2621
2622 cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2623
2624 /*
2625 * Change the PHY context configuration as it is currently referenced
2626 * only by the P2P Device MAC
2627 */
2628 if (mvmvif->phy_ctxt->ref == 1) {
2629 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2630 &chandef, 1, 1);
2631 if (ret)
2632 goto out_unlock;
2633 } else {
2634 /*
2635 * The PHY context is shared with other MACs. Need to remove the
2636 * P2P Device from the binding, allocate an new PHY context and
2637 * create a new binding
2638 */
2639 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2640 if (!phy_ctxt) {
2641 ret = -ENOSPC;
2642 goto out_unlock;
2643 }
2644
2645 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2646 1, 1);
2647 if (ret) {
2648 IWL_ERR(mvm, "Failed to change PHY context\n");
2649 goto out_unlock;
2650 }
2651
2652 /* Unbind the P2P_DEVICE from the current PHY context */
2653 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2654 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2655 goto out_unlock;
2656
2657 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2658
2659 /* Bind the P2P_DEVICE to the new allocated PHY context */
2660 mvmvif->phy_ctxt = phy_ctxt;
2661
2662 ret = iwl_mvm_binding_add_vif(mvm, vif);
2663 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2664 goto out_unlock;
2665
2666 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2667 }
2668
2669 schedule_time_event:
2670 /* Schedule the time events */
2671 ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2672
2673 out_unlock:
2674 mutex_unlock(&mvm->mutex);
2675 IWL_DEBUG_MAC80211(mvm, "leave\n");
2676 return ret;
2677 }
2678
2679 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2680 {
2681 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2682
2683 IWL_DEBUG_MAC80211(mvm, "enter\n");
2684
2685 mutex_lock(&mvm->mutex);
2686 iwl_mvm_stop_roc(mvm);
2687 mutex_unlock(&mvm->mutex);
2688
2689 IWL_DEBUG_MAC80211(mvm, "leave\n");
2690 return 0;
2691 }
2692
2693 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2694 struct ieee80211_chanctx_conf *ctx)
2695 {
2696 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2697 struct iwl_mvm_phy_ctxt *phy_ctxt;
2698 int ret;
2699
2700 lockdep_assert_held(&mvm->mutex);
2701
2702 IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2703
2704 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2705 if (!phy_ctxt) {
2706 ret = -ENOSPC;
2707 goto out;
2708 }
2709
2710 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2711 ctx->rx_chains_static,
2712 ctx->rx_chains_dynamic);
2713 if (ret) {
2714 IWL_ERR(mvm, "Failed to add PHY context\n");
2715 goto out;
2716 }
2717
2718 iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2719 *phy_ctxt_id = phy_ctxt->id;
2720 out:
2721 return ret;
2722 }
2723
2724 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2725 struct ieee80211_chanctx_conf *ctx)
2726 {
2727 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2728 int ret;
2729
2730 mutex_lock(&mvm->mutex);
2731 ret = __iwl_mvm_add_chanctx(mvm, ctx);
2732 mutex_unlock(&mvm->mutex);
2733
2734 return ret;
2735 }
2736
2737 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2738 struct ieee80211_chanctx_conf *ctx)
2739 {
2740 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2741 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2742
2743 lockdep_assert_held(&mvm->mutex);
2744
2745 iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2746 }
2747
2748 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2749 struct ieee80211_chanctx_conf *ctx)
2750 {
2751 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2752
2753 mutex_lock(&mvm->mutex);
2754 __iwl_mvm_remove_chanctx(mvm, ctx);
2755 mutex_unlock(&mvm->mutex);
2756 }
2757
2758 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2759 struct ieee80211_chanctx_conf *ctx,
2760 u32 changed)
2761 {
2762 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2763 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2764 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2765
2766 if (WARN_ONCE((phy_ctxt->ref > 1) &&
2767 (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2768 IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2769 IEEE80211_CHANCTX_CHANGE_RADAR |
2770 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2771 "Cannot change PHY. Ref=%d, changed=0x%X\n",
2772 phy_ctxt->ref, changed))
2773 return;
2774
2775 mutex_lock(&mvm->mutex);
2776 iwl_mvm_bt_coex_vif_change(mvm);
2777 iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2778 ctx->rx_chains_static,
2779 ctx->rx_chains_dynamic);
2780 mutex_unlock(&mvm->mutex);
2781 }
2782
2783 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2784 struct ieee80211_vif *vif,
2785 struct ieee80211_chanctx_conf *ctx,
2786 bool switching_chanctx)
2787 {
2788 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2789 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2790 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2791 int ret;
2792
2793 lockdep_assert_held(&mvm->mutex);
2794
2795 mvmvif->phy_ctxt = phy_ctxt;
2796
2797 switch (vif->type) {
2798 case NL80211_IFTYPE_AP:
2799 /* only needed if we're switching chanctx (i.e. during CSA) */
2800 if (switching_chanctx) {
2801 mvmvif->ap_ibss_active = true;
2802 break;
2803 }
2804 case NL80211_IFTYPE_ADHOC:
2805 /*
2806 * The AP binding flow is handled as part of the start_ap flow
2807 * (in bss_info_changed), similarly for IBSS.
2808 */
2809 ret = 0;
2810 goto out;
2811 case NL80211_IFTYPE_STATION:
2812 break;
2813 case NL80211_IFTYPE_MONITOR:
2814 /* always disable PS when a monitor interface is active */
2815 mvmvif->ps_disabled = true;
2816 break;
2817 default:
2818 ret = -EINVAL;
2819 goto out;
2820 }
2821
2822 ret = iwl_mvm_binding_add_vif(mvm, vif);
2823 if (ret)
2824 goto out;
2825
2826 /*
2827 * Power state must be updated before quotas,
2828 * otherwise fw will complain.
2829 */
2830 iwl_mvm_power_update_mac(mvm);
2831
2832 /* Setting the quota at this stage is only required for monitor
2833 * interfaces. For the other types, the bss_info changed flow
2834 * will handle quota settings.
2835 */
2836 if (vif->type == NL80211_IFTYPE_MONITOR) {
2837 mvmvif->monitor_active = true;
2838 ret = iwl_mvm_update_quotas(mvm, NULL);
2839 if (ret)
2840 goto out_remove_binding;
2841 }
2842
2843 /* Handle binding during CSA */
2844 if ((vif->type == NL80211_IFTYPE_AP) ||
2845 (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2846 iwl_mvm_update_quotas(mvm, NULL);
2847 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2848 }
2849
2850 if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
2851 struct iwl_mvm_sta *mvmsta;
2852
2853 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
2854 mvmvif->ap_sta_id);
2855
2856 if (WARN_ON(!mvmsta))
2857 goto out;
2858
2859 /* TODO: only re-enable after the first beacon */
2860 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
2861 }
2862
2863 goto out;
2864
2865 out_remove_binding:
2866 iwl_mvm_binding_remove_vif(mvm, vif);
2867 iwl_mvm_power_update_mac(mvm);
2868 out:
2869 if (ret)
2870 mvmvif->phy_ctxt = NULL;
2871 return ret;
2872 }
2873 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2874 struct ieee80211_vif *vif,
2875 struct ieee80211_chanctx_conf *ctx)
2876 {
2877 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2878 int ret;
2879
2880 mutex_lock(&mvm->mutex);
2881 ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2882 mutex_unlock(&mvm->mutex);
2883
2884 return ret;
2885 }
2886
2887 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2888 struct ieee80211_vif *vif,
2889 struct ieee80211_chanctx_conf *ctx,
2890 bool switching_chanctx)
2891 {
2892 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2893 struct ieee80211_vif *disabled_vif = NULL;
2894
2895 lockdep_assert_held(&mvm->mutex);
2896
2897 iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2898
2899 switch (vif->type) {
2900 case NL80211_IFTYPE_ADHOC:
2901 goto out;
2902 case NL80211_IFTYPE_MONITOR:
2903 mvmvif->monitor_active = false;
2904 mvmvif->ps_disabled = false;
2905 break;
2906 case NL80211_IFTYPE_AP:
2907 /* This part is triggered only during CSA */
2908 if (!switching_chanctx || !mvmvif->ap_ibss_active)
2909 goto out;
2910
2911 mvmvif->csa_countdown = false;
2912
2913 /* Set CS bit on all the stations */
2914 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2915
2916 /* Save blocked iface, the timeout is set on the next beacon */
2917 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2918
2919 mvmvif->ap_ibss_active = false;
2920 break;
2921 case NL80211_IFTYPE_STATION:
2922 if (!switching_chanctx)
2923 break;
2924
2925 disabled_vif = vif;
2926
2927 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2928 break;
2929 default:
2930 break;
2931 }
2932
2933 iwl_mvm_update_quotas(mvm, disabled_vif);
2934 iwl_mvm_binding_remove_vif(mvm, vif);
2935
2936 out:
2937 mvmvif->phy_ctxt = NULL;
2938 iwl_mvm_power_update_mac(mvm);
2939 }
2940
2941 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2942 struct ieee80211_vif *vif,
2943 struct ieee80211_chanctx_conf *ctx)
2944 {
2945 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2946
2947 mutex_lock(&mvm->mutex);
2948 __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2949 mutex_unlock(&mvm->mutex);
2950 }
2951
2952 static int
2953 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
2954 struct ieee80211_vif_chanctx_switch *vifs)
2955 {
2956 int ret;
2957
2958 mutex_lock(&mvm->mutex);
2959 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2960 __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2961
2962 ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2963 if (ret) {
2964 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2965 goto out_reassign;
2966 }
2967
2968 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2969 true);
2970 if (ret) {
2971 IWL_ERR(mvm,
2972 "failed to assign new_ctx during channel switch\n");
2973 goto out_remove;
2974 }
2975
2976 /* we don't support TDLS during DCM - can be caused by channel switch */
2977 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2978 iwl_mvm_teardown_tdls_peers(mvm);
2979
2980 goto out;
2981
2982 out_remove:
2983 __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2984
2985 out_reassign:
2986 if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
2987 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2988 goto out_restart;
2989 }
2990
2991 if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2992 true)) {
2993 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2994 goto out_restart;
2995 }
2996
2997 goto out;
2998
2999 out_restart:
3000 /* things keep failing, better restart the hw */
3001 iwl_mvm_nic_restart(mvm, false);
3002
3003 out:
3004 mutex_unlock(&mvm->mutex);
3005
3006 return ret;
3007 }
3008
3009 static int
3010 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3011 struct ieee80211_vif_chanctx_switch *vifs)
3012 {
3013 int ret;
3014
3015 mutex_lock(&mvm->mutex);
3016 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3017
3018 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3019 true);
3020 if (ret) {
3021 IWL_ERR(mvm,
3022 "failed to assign new_ctx during channel switch\n");
3023 goto out_reassign;
3024 }
3025
3026 goto out;
3027
3028 out_reassign:
3029 if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3030 true)) {
3031 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3032 goto out_restart;
3033 }
3034
3035 goto out;
3036
3037 out_restart:
3038 /* things keep failing, better restart the hw */
3039 iwl_mvm_nic_restart(mvm, false);
3040
3041 out:
3042 mutex_unlock(&mvm->mutex);
3043
3044 return ret;
3045 }
3046
3047 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3048 struct ieee80211_vif_chanctx_switch *vifs,
3049 int n_vifs,
3050 enum ieee80211_chanctx_switch_mode mode)
3051 {
3052 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3053 int ret;
3054
3055 /* we only support a single-vif right now */
3056 if (n_vifs > 1)
3057 return -EOPNOTSUPP;
3058
3059 switch (mode) {
3060 case CHANCTX_SWMODE_SWAP_CONTEXTS:
3061 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3062 break;
3063 case CHANCTX_SWMODE_REASSIGN_VIF:
3064 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3065 break;
3066 default:
3067 ret = -EOPNOTSUPP;
3068 break;
3069 }
3070
3071 return ret;
3072 }
3073
3074 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3075 struct ieee80211_sta *sta,
3076 bool set)
3077 {
3078 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3079 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
3080
3081 if (!mvm_sta || !mvm_sta->vif) {
3082 IWL_ERR(mvm, "Station is not associated to a vif\n");
3083 return -EINVAL;
3084 }
3085
3086 return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3087 }
3088
3089 #ifdef CONFIG_NL80211_TESTMODE
3090 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3091 [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3092 [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3093 [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3094 };
3095
3096 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3097 struct ieee80211_vif *vif,
3098 void *data, int len)
3099 {
3100 struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3101 int err;
3102 u32 noa_duration;
3103
3104 err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3105 if (err)
3106 return err;
3107
3108 if (!tb[IWL_MVM_TM_ATTR_CMD])
3109 return -EINVAL;
3110
3111 switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3112 case IWL_MVM_TM_CMD_SET_NOA:
3113 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3114 !vif->bss_conf.enable_beacon ||
3115 !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3116 return -EINVAL;
3117
3118 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3119 if (noa_duration >= vif->bss_conf.beacon_int)
3120 return -EINVAL;
3121
3122 mvm->noa_duration = noa_duration;
3123 mvm->noa_vif = vif;
3124
3125 return iwl_mvm_update_quotas(mvm, NULL);
3126 case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3127 /* must be associated client vif - ignore authorized */
3128 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3129 !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3130 !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3131 return -EINVAL;
3132
3133 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3134 return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3135 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3136 }
3137
3138 return -EOPNOTSUPP;
3139 }
3140
3141 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3142 struct ieee80211_vif *vif,
3143 void *data, int len)
3144 {
3145 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3146 int err;
3147
3148 mutex_lock(&mvm->mutex);
3149 err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3150 mutex_unlock(&mvm->mutex);
3151
3152 return err;
3153 }
3154 #endif
3155
3156 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3157 struct ieee80211_vif *vif,
3158 struct ieee80211_channel_switch *chsw)
3159 {
3160 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3161 struct ieee80211_vif *csa_vif;
3162 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3163 u32 apply_time;
3164 int ret;
3165
3166 mutex_lock(&mvm->mutex);
3167
3168 IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3169 chsw->chandef.center_freq1);
3170
3171 switch (vif->type) {
3172 case NL80211_IFTYPE_AP:
3173 csa_vif =
3174 rcu_dereference_protected(mvm->csa_vif,
3175 lockdep_is_held(&mvm->mutex));
3176 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3177 "Another CSA is already in progress")) {
3178 ret = -EBUSY;
3179 goto out_unlock;
3180 }
3181
3182 rcu_assign_pointer(mvm->csa_vif, vif);
3183
3184 if (WARN_ONCE(mvmvif->csa_countdown,
3185 "Previous CSA countdown didn't complete")) {
3186 ret = -EBUSY;
3187 goto out_unlock;
3188 }
3189
3190 break;
3191 case NL80211_IFTYPE_STATION:
3192 apply_time = chsw->timestamp +
3193 (vif->bss_conf.beacon_int * chsw->count * 1024);
3194
3195 if (chsw->block_tx)
3196 iwl_mvm_csa_client_absent(mvm, vif);
3197
3198 iwl_mvm_schedule_csa_period(mvm, vif,
3199 IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT,
3200 apply_time);
3201 break;
3202 default:
3203 break;
3204 }
3205
3206 mvmvif->ps_disabled = true;
3207
3208 ret = iwl_mvm_power_update_ps(mvm);
3209 if (ret)
3210 goto out_unlock;
3211
3212 out_unlock:
3213 mutex_unlock(&mvm->mutex);
3214
3215 return ret;
3216 }
3217
3218 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3219 struct ieee80211_vif *vif)
3220 {
3221 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3222 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3223 int ret;
3224
3225 mutex_lock(&mvm->mutex);
3226
3227 mvmvif->ps_disabled = false;
3228
3229 ret = iwl_mvm_power_update_ps(mvm);
3230
3231 mutex_unlock(&mvm->mutex);
3232
3233 return ret;
3234 }
3235
3236 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3237 struct ieee80211_vif *vif, u32 queues, bool drop)
3238 {
3239 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3240 struct iwl_mvm_vif *mvmvif;
3241 struct iwl_mvm_sta *mvmsta;
3242 struct ieee80211_sta *sta;
3243 int i;
3244 u32 msk = 0;
3245
3246 if (!vif || vif->type != NL80211_IFTYPE_STATION)
3247 return;
3248
3249 mutex_lock(&mvm->mutex);
3250 mvmvif = iwl_mvm_vif_from_mac80211(vif);
3251
3252 /* flush the AP-station and all TDLS peers */
3253 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3254 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3255 lockdep_is_held(&mvm->mutex));
3256 if (IS_ERR_OR_NULL(sta))
3257 continue;
3258
3259 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3260 if (mvmsta->vif != vif)
3261 continue;
3262
3263 /* make sure only TDLS peers or the AP are flushed */
3264 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3265
3266 msk |= mvmsta->tfd_queue_msk;
3267 }
3268
3269 if (drop) {
3270 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3271 IWL_ERR(mvm, "flush request fail\n");
3272 mutex_unlock(&mvm->mutex);
3273 } else {
3274 mutex_unlock(&mvm->mutex);
3275
3276 /* this can take a while, and we may need/want other operations
3277 * to succeed while doing this, so do it without the mutex held
3278 */
3279 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3280 }
3281 }
3282
3283 const struct ieee80211_ops iwl_mvm_hw_ops = {
3284 .tx = iwl_mvm_mac_tx,
3285 .ampdu_action = iwl_mvm_mac_ampdu_action,
3286 .start = iwl_mvm_mac_start,
3287 .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3288 .stop = iwl_mvm_mac_stop,
3289 .add_interface = iwl_mvm_mac_add_interface,
3290 .remove_interface = iwl_mvm_mac_remove_interface,
3291 .config = iwl_mvm_mac_config,
3292 .prepare_multicast = iwl_mvm_prepare_multicast,
3293 .configure_filter = iwl_mvm_configure_filter,
3294 .bss_info_changed = iwl_mvm_bss_info_changed,
3295 .hw_scan = iwl_mvm_mac_hw_scan,
3296 .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3297 .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3298 .sta_state = iwl_mvm_mac_sta_state,
3299 .sta_notify = iwl_mvm_mac_sta_notify,
3300 .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3301 .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3302 .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3303 .sta_rc_update = iwl_mvm_sta_rc_update,
3304 .conf_tx = iwl_mvm_mac_conf_tx,
3305 .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3306 .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3307 .flush = iwl_mvm_mac_flush,
3308 .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3309 .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3310 .set_key = iwl_mvm_mac_set_key,
3311 .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3312 .remain_on_channel = iwl_mvm_roc,
3313 .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3314 .add_chanctx = iwl_mvm_add_chanctx,
3315 .remove_chanctx = iwl_mvm_remove_chanctx,
3316 .change_chanctx = iwl_mvm_change_chanctx,
3317 .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3318 .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3319 .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3320
3321 .start_ap = iwl_mvm_start_ap_ibss,
3322 .stop_ap = iwl_mvm_stop_ap_ibss,
3323 .join_ibss = iwl_mvm_start_ap_ibss,
3324 .leave_ibss = iwl_mvm_stop_ap_ibss,
3325
3326 .set_tim = iwl_mvm_set_tim,
3327
3328 .pre_channel_switch = iwl_mvm_pre_channel_switch,
3329 .post_channel_switch = iwl_mvm_post_channel_switch,
3330
3331 .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
3332 .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
3333 .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
3334
3335 CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3336
3337 #ifdef CONFIG_PM_SLEEP
3338 /* look at d3.c */
3339 .suspend = iwl_mvm_suspend,
3340 .resume = iwl_mvm_resume,
3341 .set_wakeup = iwl_mvm_set_wakeup,
3342 .set_rekey_data = iwl_mvm_set_rekey_data,
3343 #if IS_ENABLED(CONFIG_IPV6)
3344 .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3345 #endif
3346 .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3347 #endif
3348 };
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