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mm/zsmalloc: allocate exactly size of struct zs_pool
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / mvm / mac80211.c
blob31a5b3f4266c3edaf26a05dfca208ddd2082f8ca
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 IEEE80211_RADIOTAP_VHT_KNOWN_BEAMFORMED;
328 hw->rate_control_algorithm = "iwl-mvm-rs";
329
330 /*
331 * Enable 11w if advertised by firmware and software crypto
332 * is not enabled (as the firmware will interpret some mgmt
333 * packets, so enabling it with software crypto isn't safe)
334 */
335 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
336 !iwlwifi_mod_params.sw_crypto)
337 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
338
339 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
340 !iwlwifi_mod_params.uapsd_disable) {
341 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
342 hw->uapsd_queues = IWL_MVM_UAPSD_QUEUES;
343 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
344 }
345
346 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN ||
347 mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN) {
348 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
349 hw->wiphy->features |=
350 NL80211_FEATURE_SCHED_SCAN_RANDOM_MAC_ADDR |
351 NL80211_FEATURE_SCAN_RANDOM_MAC_ADDR;
352 }
353
354 hw->sta_data_size = sizeof(struct iwl_mvm_sta);
355 hw->vif_data_size = sizeof(struct iwl_mvm_vif);
356 hw->chanctx_data_size = sizeof(u16);
357
358 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
359 BIT(NL80211_IFTYPE_P2P_CLIENT) |
360 BIT(NL80211_IFTYPE_AP) |
361 BIT(NL80211_IFTYPE_P2P_GO) |
362 BIT(NL80211_IFTYPE_P2P_DEVICE) |
363 BIT(NL80211_IFTYPE_ADHOC);
364
365 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
366 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
367 REGULATORY_DISABLE_BEACON_HINTS;
368
369 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
370 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
371
372 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
373
374 hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
375 hw->wiphy->n_iface_combinations =
376 ARRAY_SIZE(iwl_mvm_iface_combinations);
377
378 hw->wiphy->max_remain_on_channel_duration = 10000;
379 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
380
381 /* Extract MAC address */
382 memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
383 hw->wiphy->addresses = mvm->addresses;
384 hw->wiphy->n_addresses = 1;
385
386 /* Extract additional MAC addresses if available */
387 num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
388 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
389
390 for (i = 1; i < num_mac; i++) {
391 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
392 ETH_ALEN);
393 mvm->addresses[i].addr[5]++;
394 hw->wiphy->n_addresses++;
395 }
396
397 iwl_mvm_reset_phy_ctxts(mvm);
398
399 hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm, false);
400
401 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
402
403 if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
404 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
405 &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
406 if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
407 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
408 &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
409
410 hw->wiphy->hw_version = mvm->trans->hw_id;
411
412 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
413 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
414 else
415 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
416
417 if (IWL_UCODE_API(mvm->fw->ucode_ver) >= 10) {
418 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
419 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
420 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
421 /* we create the 802.11 header and zero length SSID IE. */
422 hw->wiphy->max_sched_scan_ie_len =
423 SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
424 }
425
426 hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
427 NL80211_FEATURE_LOW_PRIORITY_SCAN |
428 NL80211_FEATURE_P2P_GO_OPPPS |
429 NL80211_FEATURE_DYNAMIC_SMPS |
430 NL80211_FEATURE_STATIC_SMPS |
431 NL80211_FEATURE_SUPPORTS_WMM_ADMISSION;
432
433 if (mvm->fw->ucode_capa.capa[0] &
434 IWL_UCODE_TLV_CAPA_TXPOWER_INSERTION_SUPPORT)
435 hw->wiphy->features |= NL80211_FEATURE_TX_POWER_INSERTION;
436 if (mvm->fw->ucode_capa.capa[0] &
437 IWL_UCODE_TLV_CAPA_QUIET_PERIOD_SUPPORT)
438 hw->wiphy->features |= NL80211_FEATURE_QUIET;
439
440 if (mvm->fw->ucode_capa.capa[0] &
441 IWL_UCODE_TLV_CAPA_DS_PARAM_SET_IE_SUPPORT)
442 hw->wiphy->features |=
443 NL80211_FEATURE_DS_PARAM_SET_IE_IN_PROBES;
444
445 if (mvm->fw->ucode_capa.capa[0] &
446 IWL_UCODE_TLV_CAPA_WFA_TPC_REP_IE_SUPPORT)
447 hw->wiphy->features |= NL80211_FEATURE_WFA_TPC_IE_IN_PROBES;
448
449 mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
450
451 /* currently FW API supports only one optional cipher scheme */
452 if (mvm->fw->cs[0].cipher) {
453 mvm->hw->n_cipher_schemes = 1;
454 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
455 }
456
457 #ifdef CONFIG_PM_SLEEP
458 if (iwl_mvm_is_d0i3_supported(mvm) &&
459 device_can_wakeup(mvm->trans->dev)) {
460 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
461 hw->wiphy->wowlan = &mvm->wowlan;
462 } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
463 mvm->trans->ops->d3_suspend &&
464 mvm->trans->ops->d3_resume &&
465 device_can_wakeup(mvm->trans->dev)) {
466 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
467 WIPHY_WOWLAN_DISCONNECT |
468 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
469 WIPHY_WOWLAN_RFKILL_RELEASE |
470 WIPHY_WOWLAN_NET_DETECT;
471 if (!iwlwifi_mod_params.sw_crypto)
472 mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
473 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
474 WIPHY_WOWLAN_4WAY_HANDSHAKE;
475
476 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
477 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
478 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
479 mvm->wowlan.max_nd_match_sets = IWL_SCAN_MAX_PROFILES;
480 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
481 hw->wiphy->wowlan = &mvm->wowlan;
482 }
483 #endif
484
485 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
486 /* assign default bcast filtering configuration */
487 mvm->bcast_filters = iwl_mvm_default_bcast_filters;
488 #endif
489
490 ret = iwl_mvm_leds_init(mvm);
491 if (ret)
492 return ret;
493
494 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_TDLS_SUPPORT) {
495 IWL_DEBUG_TDLS(mvm, "TDLS supported\n");
496 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_TDLS;
497 }
498
499 if (mvm->fw->ucode_capa.capa[0] &
500 IWL_UCODE_TLV_CAPA_TDLS_CHANNEL_SWITCH) {
501 IWL_DEBUG_TDLS(mvm, "TDLS channel switch supported\n");
502 hw->wiphy->features |= NL80211_FEATURE_TDLS_CHANNEL_SWITCH;
503 }
504
505 ret = ieee80211_register_hw(mvm->hw);
506 if (ret)
507 iwl_mvm_leds_exit(mvm);
508
509 return ret;
510 }
511
512 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
513 struct ieee80211_sta *sta,
514 struct sk_buff *skb)
515 {
516 struct iwl_mvm_sta *mvmsta;
517 bool defer = false;
518
519 /*
520 * double check the IN_D0I3 flag both before and after
521 * taking the spinlock, in order to prevent taking
522 * the spinlock when not needed.
523 */
524 if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
525 return false;
526
527 spin_lock(&mvm->d0i3_tx_lock);
528 /*
529 * testing the flag again ensures the skb dequeue
530 * loop (on d0i3 exit) hasn't run yet.
531 */
532 if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
533 goto out;
534
535 mvmsta = iwl_mvm_sta_from_mac80211(sta);
536 if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
537 mvmsta->sta_id != mvm->d0i3_ap_sta_id)
538 goto out;
539
540 __skb_queue_tail(&mvm->d0i3_tx, skb);
541 ieee80211_stop_queues(mvm->hw);
542
543 /* trigger wakeup */
544 iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
545 iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
546
547 defer = true;
548 out:
549 spin_unlock(&mvm->d0i3_tx_lock);
550 return defer;
551 }
552
553 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
554 struct ieee80211_tx_control *control,
555 struct sk_buff *skb)
556 {
557 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
558 struct ieee80211_sta *sta = control->sta;
559 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
560 struct ieee80211_hdr *hdr = (void *)skb->data;
561
562 if (iwl_mvm_is_radio_killed(mvm)) {
563 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
564 goto drop;
565 }
566
567 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
568 !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status) &&
569 !test_bit(IWL_MVM_STATUS_ROC_AUX_RUNNING, &mvm->status))
570 goto drop;
571
572 /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
573 if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
574 ieee80211_is_mgmt(hdr->frame_control) &&
575 !ieee80211_is_deauth(hdr->frame_control) &&
576 !ieee80211_is_disassoc(hdr->frame_control) &&
577 !ieee80211_is_action(hdr->frame_control)))
578 sta = NULL;
579
580 if (sta) {
581 if (iwl_mvm_defer_tx(mvm, sta, skb))
582 return;
583 if (iwl_mvm_tx_skb(mvm, skb, sta))
584 goto drop;
585 return;
586 }
587
588 if (iwl_mvm_tx_skb_non_sta(mvm, skb))
589 goto drop;
590 return;
591 drop:
592 ieee80211_free_txskb(hw, skb);
593 }
594
595 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
596 {
597 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
598 return false;
599 return true;
600 }
601
602 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
603 {
604 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
605 return false;
606 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
607 return true;
608
609 /* enabled by default */
610 return true;
611 }
612
613 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
614 struct ieee80211_vif *vif,
615 enum ieee80211_ampdu_mlme_action action,
616 struct ieee80211_sta *sta, u16 tid,
617 u16 *ssn, u8 buf_size)
618 {
619 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
620 int ret;
621 bool tx_agg_ref = false;
622
623 IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
624 sta->addr, tid, action);
625
626 if (!(mvm->nvm_data->sku_cap_11n_enable))
627 return -EACCES;
628
629 /* return from D0i3 before starting a new Tx aggregation */
630 switch (action) {
631 case IEEE80211_AMPDU_TX_START:
632 case IEEE80211_AMPDU_TX_STOP_CONT:
633 case IEEE80211_AMPDU_TX_STOP_FLUSH:
634 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
635 case IEEE80211_AMPDU_TX_OPERATIONAL:
636 /*
637 * for tx start, wait synchronously until D0i3 exit to
638 * get the correct sequence number for the tid.
639 * additionally, some other ampdu actions use direct
640 * target access, which is not handled automatically
641 * by the trans layer (unlike commands), so wait for
642 * d0i3 exit in these cases as well.
643 */
644 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
645 if (ret)
646 return ret;
647
648 tx_agg_ref = true;
649 break;
650 default:
651 break;
652 }
653
654 mutex_lock(&mvm->mutex);
655
656 switch (action) {
657 case IEEE80211_AMPDU_RX_START:
658 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
659 ret = -EINVAL;
660 break;
661 }
662 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
663 break;
664 case IEEE80211_AMPDU_RX_STOP:
665 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
666 break;
667 case IEEE80211_AMPDU_TX_START:
668 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
669 ret = -EINVAL;
670 break;
671 }
672 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
673 break;
674 case IEEE80211_AMPDU_TX_STOP_CONT:
675 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
676 break;
677 case IEEE80211_AMPDU_TX_STOP_FLUSH:
678 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
679 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
680 break;
681 case IEEE80211_AMPDU_TX_OPERATIONAL:
682 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
683 break;
684 default:
685 WARN_ON_ONCE(1);
686 ret = -EINVAL;
687 break;
688 }
689 mutex_unlock(&mvm->mutex);
690
691 /*
692 * If the tid is marked as started, we won't use it for offloaded
693 * traffic on the next D0i3 entry. It's safe to unref.
694 */
695 if (tx_agg_ref)
696 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
697
698 return ret;
699 }
700
701 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
702 struct ieee80211_vif *vif)
703 {
704 struct iwl_mvm *mvm = data;
705 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
706
707 mvmvif->uploaded = false;
708 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
709
710 /* does this make sense at all? */
711 mvmvif->color++;
712
713 spin_lock_bh(&mvm->time_event_lock);
714 iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
715 spin_unlock_bh(&mvm->time_event_lock);
716
717 mvmvif->phy_ctxt = NULL;
718 memset(&mvmvif->bf_data, 0, sizeof(mvmvif->bf_data));
719 }
720
721 static ssize_t iwl_mvm_read_coredump(char *buffer, loff_t offset, size_t count,
722 const void *data, size_t datalen)
723 {
724 const struct iwl_mvm_dump_ptrs *dump_ptrs = data;
725 ssize_t bytes_read;
726 ssize_t bytes_read_trans;
727
728 if (offset < dump_ptrs->op_mode_len) {
729 bytes_read = min_t(ssize_t, count,
730 dump_ptrs->op_mode_len - offset);
731 memcpy(buffer, (u8 *)dump_ptrs->op_mode_ptr + offset,
732 bytes_read);
733 offset += bytes_read;
734 count -= bytes_read;
735
736 if (count == 0)
737 return bytes_read;
738 } else {
739 bytes_read = 0;
740 }
741
742 if (!dump_ptrs->trans_ptr)
743 return bytes_read;
744
745 offset -= dump_ptrs->op_mode_len;
746 bytes_read_trans = min_t(ssize_t, count,
747 dump_ptrs->trans_ptr->len - offset);
748 memcpy(buffer + bytes_read,
749 (u8 *)dump_ptrs->trans_ptr->data + offset,
750 bytes_read_trans);
751
752 return bytes_read + bytes_read_trans;
753 }
754
755 static void iwl_mvm_free_coredump(const void *data)
756 {
757 const struct iwl_mvm_dump_ptrs *fw_error_dump = data;
758
759 vfree(fw_error_dump->op_mode_ptr);
760 vfree(fw_error_dump->trans_ptr);
761 kfree(fw_error_dump);
762 }
763
764 void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
765 {
766 struct iwl_fw_error_dump_file *dump_file;
767 struct iwl_fw_error_dump_data *dump_data;
768 struct iwl_fw_error_dump_info *dump_info;
769 struct iwl_mvm_dump_ptrs *fw_error_dump;
770 const struct fw_img *img;
771 u32 sram_len, sram_ofs;
772 u32 file_len, rxf_len;
773 unsigned long flags;
774 int reg_val;
775
776 lockdep_assert_held(&mvm->mutex);
777
778 fw_error_dump = kzalloc(sizeof(*fw_error_dump), GFP_KERNEL);
779 if (!fw_error_dump)
780 return;
781
782 img = &mvm->fw->img[mvm->cur_ucode];
783 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
784 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
785
786 /* reading buffer size */
787 reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
788 rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
789
790 /* the register holds the value divided by 128 */
791 rxf_len = rxf_len << 7;
792
793 file_len = sizeof(*dump_file) +
794 sizeof(*dump_data) * 3 +
795 sram_len +
796 rxf_len +
797 sizeof(*dump_info);
798
799 dump_file = vzalloc(file_len);
800 if (!dump_file) {
801 kfree(fw_error_dump);
802 return;
803 }
804
805 fw_error_dump->op_mode_ptr = dump_file;
806
807 dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
808 dump_data = (void *)dump_file->data;
809
810 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
811 dump_data->len = cpu_to_le32(sizeof(*dump_info));
812 dump_info = (void *) dump_data->data;
813 dump_info->device_family =
814 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
815 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
816 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
817 memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
818 sizeof(dump_info->fw_human_readable));
819 strncpy(dump_info->dev_human_readable, mvm->cfg->name,
820 sizeof(dump_info->dev_human_readable));
821 strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
822 sizeof(dump_info->bus_human_readable));
823
824 dump_data = iwl_fw_error_next_data(dump_data);
825 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
826 dump_data->len = cpu_to_le32(rxf_len);
827
828 if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
829 u32 *rxf = (void *)dump_data->data;
830 int i;
831
832 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
833 iwl_trans_write_prph(mvm->trans,
834 RXF_LD_FENCE_OFFSET_ADDR,
835 i * sizeof(u32));
836 rxf[i] = iwl_trans_read_prph(mvm->trans,
837 RXF_FIFO_RD_FENCE_ADDR);
838 }
839 iwl_trans_release_nic_access(mvm->trans, &flags);
840 }
841
842 dump_data = iwl_fw_error_next_data(dump_data);
843 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
844 dump_data->len = cpu_to_le32(sram_len);
845 iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
846 sram_len);
847
848 fw_error_dump->trans_ptr = iwl_trans_dump_data(mvm->trans);
849 fw_error_dump->op_mode_len = file_len;
850 if (fw_error_dump->trans_ptr)
851 file_len += fw_error_dump->trans_ptr->len;
852 dump_file->file_len = cpu_to_le32(file_len);
853
854 dev_coredumpm(mvm->trans->dev, THIS_MODULE, fw_error_dump, 0,
855 GFP_KERNEL, iwl_mvm_read_coredump, iwl_mvm_free_coredump);
856 }
857
858 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
859 {
860 /* clear the D3 reconfig, we only need it to avoid dumping a
861 * firmware coredump on reconfiguration, we shouldn't do that
862 * on D3->D0 transition
863 */
864 if (!test_and_clear_bit(IWL_MVM_STATUS_D3_RECONFIG, &mvm->status))
865 iwl_mvm_fw_error_dump(mvm);
866
867 iwl_trans_stop_device(mvm->trans);
868
869 mvm->scan_status = IWL_MVM_SCAN_NONE;
870 mvm->ps_disabled = false;
871 mvm->calibrating = false;
872
873 /* just in case one was running */
874 ieee80211_remain_on_channel_expired(mvm->hw);
875
876 ieee80211_iterate_active_interfaces_atomic(
877 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
878 iwl_mvm_cleanup_iterator, mvm);
879
880 mvm->p2p_device_vif = NULL;
881 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
882
883 iwl_mvm_reset_phy_ctxts(mvm);
884 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
885 memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
886 memset(mvm->tfd_drained, 0, sizeof(mvm->tfd_drained));
887 memset(&mvm->last_bt_notif, 0, sizeof(mvm->last_bt_notif));
888 memset(&mvm->last_bt_notif_old, 0, sizeof(mvm->last_bt_notif_old));
889 memset(&mvm->last_bt_ci_cmd, 0, sizeof(mvm->last_bt_ci_cmd));
890 memset(&mvm->last_bt_ci_cmd_old, 0, sizeof(mvm->last_bt_ci_cmd_old));
891 memset(&mvm->bt_ack_kill_msk, 0, sizeof(mvm->bt_ack_kill_msk));
892 memset(&mvm->bt_cts_kill_msk, 0, sizeof(mvm->bt_cts_kill_msk));
893
894 ieee80211_wake_queues(mvm->hw);
895
896 /* cleanup all stale references (scan, roc), but keep the
897 * ucode_down ref until reconfig is complete */
898 iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
899
900 /* clear any stale d0i3 state */
901 clear_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status);
902
903 mvm->vif_count = 0;
904 mvm->rx_ba_sessions = 0;
905 }
906
907 int __iwl_mvm_mac_start(struct iwl_mvm *mvm)
908 {
909 int ret;
910
911 lockdep_assert_held(&mvm->mutex);
912
913 /* Clean up some internal and mac80211 state on restart */
914 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
915 iwl_mvm_restart_cleanup(mvm);
916
917 ret = iwl_mvm_up(mvm);
918
919 if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
920 /* Something went wrong - we need to finish some cleanup
921 * that normally iwl_mvm_mac_restart_complete() below
922 * would do.
923 */
924 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
925 iwl_mvm_d0i3_enable_tx(mvm, NULL);
926 }
927
928 return ret;
929 }
930
931 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
932 {
933 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
934 int ret;
935
936 mutex_lock(&mvm->mutex);
937 ret = __iwl_mvm_mac_start(mvm);
938 mutex_unlock(&mvm->mutex);
939
940 return ret;
941 }
942
943 static void iwl_mvm_restart_complete(struct iwl_mvm *mvm)
944 {
945 int ret;
946
947 mutex_lock(&mvm->mutex);
948
949 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
950 iwl_mvm_d0i3_enable_tx(mvm, NULL);
951 ret = iwl_mvm_update_quotas(mvm, NULL);
952 if (ret)
953 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
954 ret);
955
956 /* allow transport/FW low power modes */
957 iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
958
959 /*
960 * If we have TDLS peers, remove them. We don't know the last seqno/PN
961 * of packets the FW sent out, so we must reconnect.
962 */
963 iwl_mvm_teardown_tdls_peers(mvm);
964
965 mutex_unlock(&mvm->mutex);
966 }
967
968 static void iwl_mvm_resume_complete(struct iwl_mvm *mvm)
969 {
970 bool exit_now;
971
972 if (!iwl_mvm_is_d0i3_supported(mvm))
973 return;
974
975 mutex_lock(&mvm->d0i3_suspend_mutex);
976 __clear_bit(D0I3_DEFER_WAKEUP, &mvm->d0i3_suspend_flags);
977 exit_now = __test_and_clear_bit(D0I3_PENDING_WAKEUP,
978 &mvm->d0i3_suspend_flags);
979 mutex_unlock(&mvm->d0i3_suspend_mutex);
980
981 if (exit_now) {
982 IWL_DEBUG_RPM(mvm, "Run deferred d0i3 exit\n");
983 _iwl_mvm_exit_d0i3(mvm);
984 }
985 }
986
987 static void
988 iwl_mvm_mac_reconfig_complete(struct ieee80211_hw *hw,
989 enum ieee80211_reconfig_type reconfig_type)
990 {
991 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
992
993 switch (reconfig_type) {
994 case IEEE80211_RECONFIG_TYPE_RESTART:
995 iwl_mvm_restart_complete(mvm);
996 break;
997 case IEEE80211_RECONFIG_TYPE_SUSPEND:
998 iwl_mvm_resume_complete(mvm);
999 break;
1000 }
1001 }
1002
1003 void __iwl_mvm_mac_stop(struct iwl_mvm *mvm)
1004 {
1005 lockdep_assert_held(&mvm->mutex);
1006
1007 /* disallow low power states when the FW is down */
1008 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
1009
1010 /* async_handlers_wk is now blocked */
1011
1012 /*
1013 * The work item could be running or queued if the
1014 * ROC time event stops just as we get here.
1015 */
1016 cancel_work_sync(&mvm->roc_done_wk);
1017
1018 iwl_trans_stop_device(mvm->trans);
1019
1020 iwl_mvm_async_handlers_purge(mvm);
1021 /* async_handlers_list is empty and will stay empty: HW is stopped */
1022
1023 /* the fw is stopped, the aux sta is dead: clean up driver state */
1024 iwl_mvm_del_aux_sta(mvm);
1025
1026 mvm->ucode_loaded = false;
1027 }
1028
1029 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
1030 {
1031 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1032
1033 flush_work(&mvm->d0i3_exit_work);
1034 flush_work(&mvm->async_handlers_wk);
1035 flush_work(&mvm->fw_error_dump_wk);
1036
1037 mutex_lock(&mvm->mutex);
1038 __iwl_mvm_mac_stop(mvm);
1039 mutex_unlock(&mvm->mutex);
1040
1041 /*
1042 * The worker might have been waiting for the mutex, let it run and
1043 * discover that its list is now empty.
1044 */
1045 cancel_work_sync(&mvm->async_handlers_wk);
1046 }
1047
1048 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
1049 {
1050 u16 i;
1051
1052 lockdep_assert_held(&mvm->mutex);
1053
1054 for (i = 0; i < NUM_PHY_CTX; i++)
1055 if (!mvm->phy_ctxts[i].ref)
1056 return &mvm->phy_ctxts[i];
1057
1058 IWL_ERR(mvm, "No available PHY context\n");
1059 return NULL;
1060 }
1061
1062 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
1063 s8 tx_power)
1064 {
1065 /* FW is in charge of regulatory enforcement */
1066 struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
1067 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
1068 .pwr_restriction = cpu_to_le16(tx_power),
1069 };
1070
1071 return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
1072 sizeof(reduce_txpwr_cmd),
1073 &reduce_txpwr_cmd);
1074 }
1075
1076 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
1077 struct ieee80211_vif *vif)
1078 {
1079 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1080 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1081 int ret;
1082
1083 /*
1084 * make sure D0i3 exit is completed, otherwise a target access
1085 * during tx queue configuration could be done when still in
1086 * D0i3 state.
1087 */
1088 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
1089 if (ret)
1090 return ret;
1091
1092 /*
1093 * Not much to do here. The stack will not allow interface
1094 * types or combinations that we didn't advertise, so we
1095 * don't really have to check the types.
1096 */
1097
1098 mutex_lock(&mvm->mutex);
1099
1100 /* Allocate resources for the MAC context, and add it to the fw */
1101 ret = iwl_mvm_mac_ctxt_init(mvm, vif);
1102 if (ret)
1103 goto out_unlock;
1104
1105 /* Counting number of interfaces is needed for legacy PM */
1106 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1107 mvm->vif_count++;
1108
1109 /*
1110 * The AP binding flow can be done only after the beacon
1111 * template is configured (which happens only in the mac80211
1112 * start_ap() flow), and adding the broadcast station can happen
1113 * only after the binding.
1114 * In addition, since modifying the MAC before adding a bcast
1115 * station is not allowed by the FW, delay the adding of MAC context to
1116 * the point where we can also add the bcast station.
1117 * In short: there's not much we can do at this point, other than
1118 * allocating resources :)
1119 */
1120 if (vif->type == NL80211_IFTYPE_AP ||
1121 vif->type == NL80211_IFTYPE_ADHOC) {
1122 ret = iwl_mvm_alloc_bcast_sta(mvm, vif);
1123 if (ret) {
1124 IWL_ERR(mvm, "Failed to allocate bcast sta\n");
1125 goto out_release;
1126 }
1127
1128 iwl_mvm_vif_dbgfs_register(mvm, vif);
1129 goto out_unlock;
1130 }
1131
1132 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1133 if (ret)
1134 goto out_release;
1135
1136 ret = iwl_mvm_power_update_mac(mvm);
1137 if (ret)
1138 goto out_release;
1139
1140 /* beacon filtering */
1141 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
1142 if (ret)
1143 goto out_remove_mac;
1144
1145 if (!mvm->bf_allowed_vif &&
1146 vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
1147 mvm->bf_allowed_vif = mvmvif;
1148 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
1149 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
1150 }
1151
1152 /*
1153 * P2P_DEVICE interface does not have a channel context assigned to it,
1154 * so a dedicated PHY context is allocated to it and the corresponding
1155 * MAC context is bound to it at this stage.
1156 */
1157 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1158
1159 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1160 if (!mvmvif->phy_ctxt) {
1161 ret = -ENOSPC;
1162 goto out_free_bf;
1163 }
1164
1165 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1166 ret = iwl_mvm_binding_add_vif(mvm, vif);
1167 if (ret)
1168 goto out_unref_phy;
1169
1170 ret = iwl_mvm_add_bcast_sta(mvm, vif);
1171 if (ret)
1172 goto out_unbind;
1173
1174 /* Save a pointer to p2p device vif, so it can later be used to
1175 * update the p2p device MAC when a GO is started/stopped */
1176 mvm->p2p_device_vif = vif;
1177 }
1178
1179 iwl_mvm_vif_dbgfs_register(mvm, vif);
1180 goto out_unlock;
1181
1182 out_unbind:
1183 iwl_mvm_binding_remove_vif(mvm, vif);
1184 out_unref_phy:
1185 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1186 out_free_bf:
1187 if (mvm->bf_allowed_vif == mvmvif) {
1188 mvm->bf_allowed_vif = NULL;
1189 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1190 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1191 }
1192 out_remove_mac:
1193 mvmvif->phy_ctxt = NULL;
1194 iwl_mvm_mac_ctxt_remove(mvm, vif);
1195 out_release:
1196 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1197 mvm->vif_count--;
1198
1199 iwl_mvm_mac_ctxt_release(mvm, vif);
1200 out_unlock:
1201 mutex_unlock(&mvm->mutex);
1202
1203 iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1204
1205 return ret;
1206 }
1207
1208 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1209 struct ieee80211_vif *vif)
1210 {
1211 u32 tfd_msk = iwl_mvm_mac_get_queues_mask(vif);
1212
1213 if (tfd_msk) {
1214 mutex_lock(&mvm->mutex);
1215 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1216 mutex_unlock(&mvm->mutex);
1217 }
1218
1219 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1220 /*
1221 * Flush the ROC worker which will flush the OFFCHANNEL queue.
1222 * We assume here that all the packets sent to the OFFCHANNEL
1223 * queue are sent in ROC session.
1224 */
1225 flush_work(&mvm->roc_done_wk);
1226 } else {
1227 /*
1228 * By now, all the AC queues are empty. The AGG queues are
1229 * empty too. We already got all the Tx responses for all the
1230 * packets in the queues. The drain work can have been
1231 * triggered. Flush it.
1232 */
1233 flush_work(&mvm->sta_drained_wk);
1234 }
1235 }
1236
1237 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1238 struct ieee80211_vif *vif)
1239 {
1240 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1241 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1242
1243 iwl_mvm_prepare_mac_removal(mvm, vif);
1244
1245 mutex_lock(&mvm->mutex);
1246
1247 if (mvm->bf_allowed_vif == mvmvif) {
1248 mvm->bf_allowed_vif = NULL;
1249 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1250 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1251 }
1252
1253 iwl_mvm_vif_dbgfs_clean(mvm, vif);
1254
1255 /*
1256 * For AP/GO interface, the tear down of the resources allocated to the
1257 * interface is be handled as part of the stop_ap flow.
1258 */
1259 if (vif->type == NL80211_IFTYPE_AP ||
1260 vif->type == NL80211_IFTYPE_ADHOC) {
1261 #ifdef CONFIG_NL80211_TESTMODE
1262 if (vif == mvm->noa_vif) {
1263 mvm->noa_vif = NULL;
1264 mvm->noa_duration = 0;
1265 }
1266 #endif
1267 iwl_mvm_dealloc_bcast_sta(mvm, vif);
1268 goto out_release;
1269 }
1270
1271 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1272 mvm->p2p_device_vif = NULL;
1273 iwl_mvm_rm_bcast_sta(mvm, vif);
1274 iwl_mvm_binding_remove_vif(mvm, vif);
1275 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1276 mvmvif->phy_ctxt = NULL;
1277 }
1278
1279 if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1280 mvm->vif_count--;
1281
1282 iwl_mvm_power_update_mac(mvm);
1283 iwl_mvm_mac_ctxt_remove(mvm, vif);
1284
1285 out_release:
1286 iwl_mvm_mac_ctxt_release(mvm, vif);
1287 mutex_unlock(&mvm->mutex);
1288 }
1289
1290 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1291 {
1292 return 0;
1293 }
1294
1295 struct iwl_mvm_mc_iter_data {
1296 struct iwl_mvm *mvm;
1297 int port_id;
1298 };
1299
1300 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1301 struct ieee80211_vif *vif)
1302 {
1303 struct iwl_mvm_mc_iter_data *data = _data;
1304 struct iwl_mvm *mvm = data->mvm;
1305 struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1306 int ret, len;
1307
1308 /* if we don't have free ports, mcast frames will be dropped */
1309 if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1310 return;
1311
1312 if (vif->type != NL80211_IFTYPE_STATION ||
1313 !vif->bss_conf.assoc)
1314 return;
1315
1316 cmd->port_id = data->port_id++;
1317 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1318 len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1319
1320 ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1321 if (ret)
1322 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1323 }
1324
1325 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1326 {
1327 struct iwl_mvm_mc_iter_data iter_data = {
1328 .mvm = mvm,
1329 };
1330
1331 lockdep_assert_held(&mvm->mutex);
1332
1333 if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1334 return;
1335
1336 ieee80211_iterate_active_interfaces_atomic(
1337 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1338 iwl_mvm_mc_iface_iterator, &iter_data);
1339 }
1340
1341 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1342 struct netdev_hw_addr_list *mc_list)
1343 {
1344 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1345 struct iwl_mcast_filter_cmd *cmd;
1346 struct netdev_hw_addr *addr;
1347 int addr_count;
1348 bool pass_all;
1349 int len;
1350
1351 addr_count = netdev_hw_addr_list_count(mc_list);
1352 pass_all = addr_count > MAX_MCAST_FILTERING_ADDRESSES ||
1353 IWL_MVM_FW_MCAST_FILTER_PASS_ALL;
1354 if (pass_all)
1355 addr_count = 0;
1356
1357 len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1358 cmd = kzalloc(len, GFP_ATOMIC);
1359 if (!cmd)
1360 return 0;
1361
1362 if (pass_all) {
1363 cmd->pass_all = 1;
1364 return (u64)(unsigned long)cmd;
1365 }
1366
1367 netdev_hw_addr_list_for_each(addr, mc_list) {
1368 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1369 cmd->count, addr->addr);
1370 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1371 addr->addr, ETH_ALEN);
1372 cmd->count++;
1373 }
1374
1375 return (u64)(unsigned long)cmd;
1376 }
1377
1378 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1379 unsigned int changed_flags,
1380 unsigned int *total_flags,
1381 u64 multicast)
1382 {
1383 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1384 struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1385
1386 mutex_lock(&mvm->mutex);
1387
1388 /* replace previous configuration */
1389 kfree(mvm->mcast_filter_cmd);
1390 mvm->mcast_filter_cmd = cmd;
1391
1392 if (!cmd)
1393 goto out;
1394
1395 iwl_mvm_recalc_multicast(mvm);
1396 out:
1397 mutex_unlock(&mvm->mutex);
1398 *total_flags = 0;
1399 }
1400
1401 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1402 struct iwl_bcast_iter_data {
1403 struct iwl_mvm *mvm;
1404 struct iwl_bcast_filter_cmd *cmd;
1405 u8 current_filter;
1406 };
1407
1408 static void
1409 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1410 const struct iwl_fw_bcast_filter *in_filter,
1411 struct iwl_fw_bcast_filter *out_filter)
1412 {
1413 struct iwl_fw_bcast_filter_attr *attr;
1414 int i;
1415
1416 memcpy(out_filter, in_filter, sizeof(*out_filter));
1417
1418 for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1419 attr = &out_filter->attrs[i];
1420
1421 if (!attr->mask)
1422 break;
1423
1424 switch (attr->reserved1) {
1425 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1426 if (vif->bss_conf.arp_addr_cnt != 1) {
1427 attr->mask = 0;
1428 continue;
1429 }
1430
1431 attr->val = vif->bss_conf.arp_addr_list[0];
1432 break;
1433 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1434 attr->val = *(__be32 *)&vif->addr[2];
1435 break;
1436 default:
1437 break;
1438 }
1439 attr->reserved1 = 0;
1440 out_filter->num_attrs++;
1441 }
1442 }
1443
1444 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1445 struct ieee80211_vif *vif)
1446 {
1447 struct iwl_bcast_iter_data *data = _data;
1448 struct iwl_mvm *mvm = data->mvm;
1449 struct iwl_bcast_filter_cmd *cmd = data->cmd;
1450 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1451 struct iwl_fw_bcast_mac *bcast_mac;
1452 int i;
1453
1454 if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1455 return;
1456
1457 bcast_mac = &cmd->macs[mvmvif->id];
1458
1459 /*
1460 * enable filtering only for associated stations, but not for P2P
1461 * Clients
1462 */
1463 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1464 !vif->bss_conf.assoc)
1465 return;
1466
1467 bcast_mac->default_discard = 1;
1468
1469 /* copy all configured filters */
1470 for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1471 /*
1472 * Make sure we don't exceed our filters limit.
1473 * if there is still a valid filter to be configured,
1474 * be on the safe side and just allow bcast for this mac.
1475 */
1476 if (WARN_ON_ONCE(data->current_filter >=
1477 ARRAY_SIZE(cmd->filters))) {
1478 bcast_mac->default_discard = 0;
1479 bcast_mac->attached_filters = 0;
1480 break;
1481 }
1482
1483 iwl_mvm_set_bcast_filter(vif,
1484 &mvm->bcast_filters[i],
1485 &cmd->filters[data->current_filter]);
1486
1487 /* skip current filter if it contains no attributes */
1488 if (!cmd->filters[data->current_filter].num_attrs)
1489 continue;
1490
1491 /* attach the filter to current mac */
1492 bcast_mac->attached_filters |=
1493 cpu_to_le16(BIT(data->current_filter));
1494
1495 data->current_filter++;
1496 }
1497 }
1498
1499 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1500 struct iwl_bcast_filter_cmd *cmd)
1501 {
1502 struct iwl_bcast_iter_data iter_data = {
1503 .mvm = mvm,
1504 .cmd = cmd,
1505 };
1506
1507 if (IWL_MVM_FW_BCAST_FILTER_PASS_ALL)
1508 return false;
1509
1510 memset(cmd, 0, sizeof(*cmd));
1511 cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1512 cmd->max_macs = ARRAY_SIZE(cmd->macs);
1513
1514 #ifdef CONFIG_IWLWIFI_DEBUGFS
1515 /* use debugfs filters/macs if override is configured */
1516 if (mvm->dbgfs_bcast_filtering.override) {
1517 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1518 sizeof(cmd->filters));
1519 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1520 sizeof(cmd->macs));
1521 return true;
1522 }
1523 #endif
1524
1525 /* if no filters are configured, do nothing */
1526 if (!mvm->bcast_filters)
1527 return false;
1528
1529 /* configure and attach these filters for each associated sta vif */
1530 ieee80211_iterate_active_interfaces(
1531 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1532 iwl_mvm_bcast_filter_iterator, &iter_data);
1533
1534 return true;
1535 }
1536 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1537 struct ieee80211_vif *vif)
1538 {
1539 struct iwl_bcast_filter_cmd cmd;
1540
1541 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1542 return 0;
1543
1544 if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1545 return 0;
1546
1547 return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1548 sizeof(cmd), &cmd);
1549 }
1550 #else
1551 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1552 struct ieee80211_vif *vif)
1553 {
1554 return 0;
1555 }
1556 #endif
1557
1558 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1559 struct ieee80211_vif *vif,
1560 struct ieee80211_bss_conf *bss_conf,
1561 u32 changes)
1562 {
1563 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1564 int ret;
1565
1566 /*
1567 * Re-calculate the tsf id, as the master-slave relations depend on the
1568 * beacon interval, which was not known when the station interface was
1569 * added.
1570 */
1571 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1572 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1573
1574 /*
1575 * If we're not associated yet, take the (new) BSSID before associating
1576 * so the firmware knows. If we're already associated, then use the old
1577 * BSSID here, and we'll send a cleared one later in the CHANGED_ASSOC
1578 * branch for disassociation below.
1579 */
1580 if (changes & BSS_CHANGED_BSSID && !mvmvif->associated)
1581 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1582
1583 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, mvmvif->bssid);
1584 if (ret)
1585 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1586
1587 /* after sending it once, adopt mac80211 data */
1588 memcpy(mvmvif->bssid, bss_conf->bssid, ETH_ALEN);
1589 mvmvif->associated = bss_conf->assoc;
1590
1591 if (changes & BSS_CHANGED_ASSOC) {
1592 if (bss_conf->assoc) {
1593 /* add quota for this interface */
1594 ret = iwl_mvm_update_quotas(mvm, NULL);
1595 if (ret) {
1596 IWL_ERR(mvm, "failed to update quotas\n");
1597 return;
1598 }
1599
1600 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1601 &mvm->status)) {
1602 /*
1603 * If we're restarting then the firmware will
1604 * obviously have lost synchronisation with
1605 * the AP. It will attempt to synchronise by
1606 * itself, but we can make it more reliable by
1607 * scheduling a session protection time event.
1608 *
1609 * The firmware needs to receive a beacon to
1610 * catch up with synchronisation, use 110% of
1611 * the beacon interval.
1612 *
1613 * Set a large maximum delay to allow for more
1614 * than a single interface.
1615 */
1616 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1617 iwl_mvm_protect_session(mvm, vif, dur, dur,
1618 5 * dur, false);
1619 }
1620
1621 iwl_mvm_sf_update(mvm, vif, false);
1622 iwl_mvm_power_vif_assoc(mvm, vif);
1623 if (vif->p2p) {
1624 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1625 iwl_mvm_update_smps(mvm, vif,
1626 IWL_MVM_SMPS_REQ_PROT,
1627 IEEE80211_SMPS_DYNAMIC);
1628 }
1629 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1630 /*
1631 * If update fails - SF might be running in associated
1632 * mode while disassociated - which is forbidden.
1633 */
1634 WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1635 "Failed to update SF upon disassociation\n");
1636
1637 /* remove AP station now that the MAC is unassoc */
1638 ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1639 if (ret)
1640 IWL_ERR(mvm, "failed to remove AP station\n");
1641
1642 if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1643 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1644 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1645 /* remove quota for this interface */
1646 ret = iwl_mvm_update_quotas(mvm, NULL);
1647 if (ret)
1648 IWL_ERR(mvm, "failed to update quotas\n");
1649
1650 if (vif->p2p)
1651 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1652
1653 /* this will take the cleared BSSID from bss_conf */
1654 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
1655 if (ret)
1656 IWL_ERR(mvm,
1657 "failed to update MAC %pM (clear after unassoc)\n",
1658 vif->addr);
1659 }
1660
1661 iwl_mvm_recalc_multicast(mvm);
1662 iwl_mvm_configure_bcast_filter(mvm, vif);
1663
1664 /* reset rssi values */
1665 mvmvif->bf_data.ave_beacon_signal = 0;
1666
1667 iwl_mvm_bt_coex_vif_change(mvm);
1668 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1669 IEEE80211_SMPS_AUTOMATIC);
1670 } else if (changes & BSS_CHANGED_BEACON_INFO) {
1671 /*
1672 * We received a beacon _after_ association so
1673 * remove the session protection.
1674 */
1675 iwl_mvm_remove_time_event(mvm, mvmvif,
1676 &mvmvif->time_event_data);
1677 }
1678
1679 if (changes & BSS_CHANGED_BEACON_INFO) {
1680 iwl_mvm_sf_update(mvm, vif, false);
1681 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1682 }
1683
1684 if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS | BSS_CHANGED_QOS)) {
1685 ret = iwl_mvm_power_update_mac(mvm);
1686 if (ret)
1687 IWL_ERR(mvm, "failed to update power mode\n");
1688 }
1689
1690 if (changes & BSS_CHANGED_TXPOWER) {
1691 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1692 bss_conf->txpower);
1693 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1694 }
1695
1696 if (changes & BSS_CHANGED_CQM) {
1697 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1698 /* reset cqm events tracking */
1699 mvmvif->bf_data.last_cqm_event = 0;
1700 if (mvmvif->bf_data.bf_enabled) {
1701 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1702 if (ret)
1703 IWL_ERR(mvm,
1704 "failed to update CQM thresholds\n");
1705 }
1706 }
1707
1708 if (changes & BSS_CHANGED_ARP_FILTER) {
1709 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1710 iwl_mvm_configure_bcast_filter(mvm, vif);
1711 }
1712 }
1713
1714 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1715 struct ieee80211_vif *vif)
1716 {
1717 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1718 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1719 int ret;
1720
1721 /*
1722 * iwl_mvm_mac_ctxt_add() might read directly from the device
1723 * (the system time), so make sure it is available.
1724 */
1725 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_START_AP);
1726 if (ret)
1727 return ret;
1728
1729 mutex_lock(&mvm->mutex);
1730
1731 /* Send the beacon template */
1732 ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1733 if (ret)
1734 goto out_unlock;
1735
1736 /*
1737 * Re-calculate the tsf id, as the master-slave relations depend on the
1738 * beacon interval, which was not known when the AP interface was added.
1739 */
1740 if (vif->type == NL80211_IFTYPE_AP)
1741 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1742
1743 /* Add the mac context */
1744 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1745 if (ret)
1746 goto out_unlock;
1747
1748 /* Perform the binding */
1749 ret = iwl_mvm_binding_add_vif(mvm, vif);
1750 if (ret)
1751 goto out_remove;
1752
1753 /* Send the bcast station. At this stage the TBTT and DTIM time events
1754 * are added and applied to the scheduler */
1755 ret = iwl_mvm_send_add_bcast_sta(mvm, vif);
1756 if (ret)
1757 goto out_unbind;
1758
1759 /* must be set before quota calculations */
1760 mvmvif->ap_ibss_active = true;
1761
1762 /* power updated needs to be done before quotas */
1763 iwl_mvm_power_update_mac(mvm);
1764
1765 ret = iwl_mvm_update_quotas(mvm, NULL);
1766 if (ret)
1767 goto out_quota_failed;
1768
1769 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1770 if (vif->p2p && mvm->p2p_device_vif)
1771 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1772
1773 iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1774
1775 iwl_mvm_bt_coex_vif_change(mvm);
1776
1777 /* we don't support TDLS during DCM */
1778 if (iwl_mvm_phy_ctx_count(mvm) > 1)
1779 iwl_mvm_teardown_tdls_peers(mvm);
1780
1781 mutex_unlock(&mvm->mutex);
1782 return 0;
1783
1784 out_quota_failed:
1785 iwl_mvm_power_update_mac(mvm);
1786 mvmvif->ap_ibss_active = false;
1787 iwl_mvm_send_rm_bcast_sta(mvm, vif);
1788 out_unbind:
1789 iwl_mvm_binding_remove_vif(mvm, vif);
1790 out_remove:
1791 iwl_mvm_mac_ctxt_remove(mvm, vif);
1792 out_unlock:
1793 mutex_unlock(&mvm->mutex);
1794 iwl_mvm_unref(mvm, IWL_MVM_REF_START_AP);
1795 return ret;
1796 }
1797
1798 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1799 struct ieee80211_vif *vif)
1800 {
1801 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1802 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1803
1804 iwl_mvm_prepare_mac_removal(mvm, vif);
1805
1806 mutex_lock(&mvm->mutex);
1807
1808 /* Handle AP stop while in CSA */
1809 if (rcu_access_pointer(mvm->csa_vif) == vif) {
1810 iwl_mvm_remove_time_event(mvm, mvmvif,
1811 &mvmvif->time_event_data);
1812 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1813 }
1814
1815 if (rcu_access_pointer(mvm->csa_tx_blocked_vif) == vif) {
1816 RCU_INIT_POINTER(mvm->csa_tx_blocked_vif, NULL);
1817 mvm->csa_tx_block_bcn_timeout = 0;
1818 }
1819
1820 mvmvif->ap_ibss_active = false;
1821 mvm->ap_last_beacon_gp2 = 0;
1822
1823 iwl_mvm_bt_coex_vif_change(mvm);
1824
1825 iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1826
1827 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1828 if (vif->p2p && mvm->p2p_device_vif)
1829 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false, NULL);
1830
1831 iwl_mvm_update_quotas(mvm, NULL);
1832 iwl_mvm_send_rm_bcast_sta(mvm, vif);
1833 iwl_mvm_binding_remove_vif(mvm, vif);
1834
1835 iwl_mvm_power_update_mac(mvm);
1836
1837 iwl_mvm_mac_ctxt_remove(mvm, vif);
1838
1839 mutex_unlock(&mvm->mutex);
1840 }
1841
1842 static void
1843 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1844 struct ieee80211_vif *vif,
1845 struct ieee80211_bss_conf *bss_conf,
1846 u32 changes)
1847 {
1848 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1849
1850 /* Changes will be applied when the AP/IBSS is started */
1851 if (!mvmvif->ap_ibss_active)
1852 return;
1853
1854 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1855 BSS_CHANGED_BANDWIDTH | BSS_CHANGED_QOS) &&
1856 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL))
1857 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1858
1859 /* Need to send a new beacon template to the FW */
1860 if (changes & BSS_CHANGED_BEACON &&
1861 iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1862 IWL_WARN(mvm, "Failed updating beacon data\n");
1863
1864 if (changes & BSS_CHANGED_TXPOWER) {
1865 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1866 bss_conf->txpower);
1867 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1868 }
1869
1870 }
1871
1872 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1873 struct ieee80211_vif *vif,
1874 struct ieee80211_bss_conf *bss_conf,
1875 u32 changes)
1876 {
1877 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1878
1879 /*
1880 * iwl_mvm_bss_info_changed_station() might call
1881 * iwl_mvm_protect_session(), which reads directly from
1882 * the device (the system time), so make sure it is available.
1883 */
1884 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_BSS_CHANGED))
1885 return;
1886
1887 mutex_lock(&mvm->mutex);
1888
1889 if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1890 iwl_mvm_scan_offload_stop(mvm, true);
1891
1892 switch (vif->type) {
1893 case NL80211_IFTYPE_STATION:
1894 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1895 break;
1896 case NL80211_IFTYPE_AP:
1897 case NL80211_IFTYPE_ADHOC:
1898 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1899 break;
1900 default:
1901 /* shouldn't happen */
1902 WARN_ON_ONCE(1);
1903 }
1904
1905 mutex_unlock(&mvm->mutex);
1906 iwl_mvm_unref(mvm, IWL_MVM_REF_BSS_CHANGED);
1907 }
1908
1909 static int iwl_mvm_cancel_scan_wait_notif(struct iwl_mvm *mvm,
1910 enum iwl_scan_status scan_type)
1911 {
1912 int ret;
1913 bool wait_for_handlers = false;
1914
1915 mutex_lock(&mvm->mutex);
1916
1917 if (mvm->scan_status != scan_type) {
1918 ret = 0;
1919 /* make sure there are no pending notifications */
1920 wait_for_handlers = true;
1921 goto out;
1922 }
1923
1924 switch (scan_type) {
1925 case IWL_MVM_SCAN_SCHED:
1926 ret = iwl_mvm_scan_offload_stop(mvm, true);
1927 break;
1928 case IWL_MVM_SCAN_OS:
1929 ret = iwl_mvm_cancel_scan(mvm);
1930 break;
1931 case IWL_MVM_SCAN_NONE:
1932 default:
1933 WARN_ON_ONCE(1);
1934 ret = -EINVAL;
1935 break;
1936 }
1937 if (ret)
1938 goto out;
1939
1940 wait_for_handlers = true;
1941 out:
1942 mutex_unlock(&mvm->mutex);
1943
1944 /* make sure we consume the completion notification */
1945 if (wait_for_handlers)
1946 iwl_mvm_wait_for_async_handlers(mvm);
1947
1948 return ret;
1949 }
1950 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1951 struct ieee80211_vif *vif,
1952 struct ieee80211_scan_request *hw_req)
1953 {
1954 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1955 struct cfg80211_scan_request *req = &hw_req->req;
1956 int ret;
1957
1958 if (req->n_channels == 0 ||
1959 req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1960 return -EINVAL;
1961
1962 if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
1963 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_SCHED);
1964 if (ret)
1965 return ret;
1966 }
1967
1968 mutex_lock(&mvm->mutex);
1969
1970 if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
1971 ret = -EBUSY;
1972 goto out;
1973 }
1974
1975 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1976
1977 if (mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)
1978 ret = iwl_mvm_scan_umac(mvm, vif, hw_req);
1979 else if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1980 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1981 else
1982 ret = iwl_mvm_scan_request(mvm, vif, req);
1983
1984 if (ret)
1985 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1986 out:
1987 mutex_unlock(&mvm->mutex);
1988 return ret;
1989 }
1990
1991 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1992 struct ieee80211_vif *vif)
1993 {
1994 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1995
1996 mutex_lock(&mvm->mutex);
1997
1998 iwl_mvm_cancel_scan(mvm);
1999
2000 mutex_unlock(&mvm->mutex);
2001 }
2002
2003 static void
2004 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
2005 struct ieee80211_sta *sta, u16 tids,
2006 int num_frames,
2007 enum ieee80211_frame_release_type reason,
2008 bool more_data)
2009 {
2010 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2011
2012 /* Called when we need to transmit (a) frame(s) from mac80211 */
2013
2014 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2015 tids, more_data, false);
2016 }
2017
2018 static void
2019 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
2020 struct ieee80211_sta *sta, u16 tids,
2021 int num_frames,
2022 enum ieee80211_frame_release_type reason,
2023 bool more_data)
2024 {
2025 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2026
2027 /* Called when we need to transmit (a) frame(s) from agg queue */
2028
2029 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
2030 tids, more_data, true);
2031 }
2032
2033 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
2034 struct ieee80211_vif *vif,
2035 enum sta_notify_cmd cmd,
2036 struct ieee80211_sta *sta)
2037 {
2038 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2039 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
2040 int tid;
2041
2042 switch (cmd) {
2043 case STA_NOTIFY_SLEEP:
2044 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
2045 ieee80211_sta_block_awake(hw, sta, true);
2046 spin_lock_bh(&mvmsta->lock);
2047 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
2048 struct iwl_mvm_tid_data *tid_data;
2049
2050 tid_data = &mvmsta->tid_data[tid];
2051 if (tid_data->state != IWL_AGG_ON &&
2052 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
2053 continue;
2054 if (iwl_mvm_tid_queued(tid_data) == 0)
2055 continue;
2056 ieee80211_sta_set_buffered(sta, tid, true);
2057 }
2058 spin_unlock_bh(&mvmsta->lock);
2059 /*
2060 * The fw updates the STA to be asleep. Tx packets on the Tx
2061 * queues to this station will not be transmitted. The fw will
2062 * send a Tx response with TX_STATUS_FAIL_DEST_PS.
2063 */
2064 break;
2065 case STA_NOTIFY_AWAKE:
2066 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
2067 break;
2068 iwl_mvm_sta_modify_ps_wake(mvm, sta);
2069 break;
2070 default:
2071 break;
2072 }
2073 }
2074
2075 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
2076 struct ieee80211_vif *vif,
2077 struct ieee80211_sta *sta)
2078 {
2079 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2080 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2081
2082 /*
2083 * This is called before mac80211 does RCU synchronisation,
2084 * so here we already invalidate our internal RCU-protected
2085 * station pointer. The rest of the code will thus no longer
2086 * be able to find the station this way, and we don't rely
2087 * on further RCU synchronisation after the sta_state()
2088 * callback deleted the station.
2089 */
2090 mutex_lock(&mvm->mutex);
2091 if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
2092 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
2093 ERR_PTR(-ENOENT));
2094 mutex_unlock(&mvm->mutex);
2095 }
2096
2097 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
2098 struct ieee80211_vif *vif,
2099 struct ieee80211_sta *sta,
2100 enum ieee80211_sta_state old_state,
2101 enum ieee80211_sta_state new_state)
2102 {
2103 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2104 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2105 int ret;
2106
2107 IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
2108 sta->addr, old_state, new_state);
2109
2110 /* this would be a mac80211 bug ... but don't crash */
2111 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
2112 return -EINVAL;
2113
2114 /* if a STA is being removed, reuse its ID */
2115 flush_work(&mvm->sta_drained_wk);
2116
2117 mutex_lock(&mvm->mutex);
2118 if (old_state == IEEE80211_STA_NOTEXIST &&
2119 new_state == IEEE80211_STA_NONE) {
2120 /*
2121 * Firmware bug - it'll crash if the beacon interval is less
2122 * than 16. We can't avoid connecting at all, so refuse the
2123 * station state change, this will cause mac80211 to abandon
2124 * attempts to connect to this AP, and eventually wpa_s will
2125 * blacklist the AP...
2126 */
2127 if (vif->type == NL80211_IFTYPE_STATION &&
2128 vif->bss_conf.beacon_int < 16) {
2129 IWL_ERR(mvm,
2130 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
2131 sta->addr, vif->bss_conf.beacon_int);
2132 ret = -EINVAL;
2133 goto out_unlock;
2134 }
2135
2136 if (sta->tdls &&
2137 (vif->p2p ||
2138 iwl_mvm_tdls_sta_count(mvm, NULL) ==
2139 IWL_MVM_TDLS_STA_COUNT ||
2140 iwl_mvm_phy_ctx_count(mvm) > 1)) {
2141 IWL_DEBUG_MAC80211(mvm, "refusing TDLS sta\n");
2142 ret = -EBUSY;
2143 goto out_unlock;
2144 }
2145
2146 ret = iwl_mvm_add_sta(mvm, vif, sta);
2147 if (sta->tdls && ret == 0)
2148 iwl_mvm_recalc_tdls_state(mvm, vif, true);
2149 } else if (old_state == IEEE80211_STA_NONE &&
2150 new_state == IEEE80211_STA_AUTH) {
2151 /*
2152 * EBS may be disabled due to previous failures reported by FW.
2153 * Reset EBS status here assuming environment has been changed.
2154 */
2155 mvm->last_ebs_successful = true;
2156 ret = 0;
2157 } else if (old_state == IEEE80211_STA_AUTH &&
2158 new_state == IEEE80211_STA_ASSOC) {
2159 ret = iwl_mvm_update_sta(mvm, vif, sta);
2160 if (ret == 0)
2161 iwl_mvm_rs_rate_init(mvm, sta,
2162 mvmvif->phy_ctxt->channel->band,
2163 true);
2164 } else if (old_state == IEEE80211_STA_ASSOC &&
2165 new_state == IEEE80211_STA_AUTHORIZED) {
2166
2167 /* we don't support TDLS during DCM */
2168 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2169 iwl_mvm_teardown_tdls_peers(mvm);
2170
2171 /* enable beacon filtering */
2172 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
2173 ret = 0;
2174 } else if (old_state == IEEE80211_STA_AUTHORIZED &&
2175 new_state == IEEE80211_STA_ASSOC) {
2176 /* disable beacon filtering */
2177 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
2178 ret = 0;
2179 } else if (old_state == IEEE80211_STA_ASSOC &&
2180 new_state == IEEE80211_STA_AUTH) {
2181 ret = 0;
2182 } else if (old_state == IEEE80211_STA_AUTH &&
2183 new_state == IEEE80211_STA_NONE) {
2184 ret = 0;
2185 } else if (old_state == IEEE80211_STA_NONE &&
2186 new_state == IEEE80211_STA_NOTEXIST) {
2187 ret = iwl_mvm_rm_sta(mvm, vif, sta);
2188 if (sta->tdls)
2189 iwl_mvm_recalc_tdls_state(mvm, vif, false);
2190 } else {
2191 ret = -EIO;
2192 }
2193 out_unlock:
2194 mutex_unlock(&mvm->mutex);
2195
2196 if (sta->tdls && ret == 0) {
2197 if (old_state == IEEE80211_STA_NOTEXIST &&
2198 new_state == IEEE80211_STA_NONE)
2199 ieee80211_reserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2200 else if (old_state == IEEE80211_STA_NONE &&
2201 new_state == IEEE80211_STA_NOTEXIST)
2202 ieee80211_unreserve_tid(sta, IWL_MVM_TDLS_FW_TID);
2203 }
2204
2205 return ret;
2206 }
2207
2208 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
2209 {
2210 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2211
2212 mvm->rts_threshold = value;
2213
2214 return 0;
2215 }
2216
2217 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
2218 struct ieee80211_vif *vif,
2219 struct ieee80211_sta *sta, u32 changed)
2220 {
2221 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2222
2223 if (vif->type == NL80211_IFTYPE_STATION &&
2224 changed & IEEE80211_RC_NSS_CHANGED)
2225 iwl_mvm_sf_update(mvm, vif, false);
2226 }
2227
2228 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
2229 struct ieee80211_vif *vif, u16 ac,
2230 const struct ieee80211_tx_queue_params *params)
2231 {
2232 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2233 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2234
2235 mvmvif->queue_params[ac] = *params;
2236
2237 /*
2238 * No need to update right away, we'll get BSS_CHANGED_QOS
2239 * The exception is P2P_DEVICE interface which needs immediate update.
2240 */
2241 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
2242 int ret;
2243
2244 mutex_lock(&mvm->mutex);
2245 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2246 mutex_unlock(&mvm->mutex);
2247 return ret;
2248 }
2249 return 0;
2250 }
2251
2252 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
2253 struct ieee80211_vif *vif)
2254 {
2255 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2256 u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
2257 200 + vif->bss_conf.beacon_int);
2258 u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
2259 100 + vif->bss_conf.beacon_int);
2260
2261 if (WARN_ON_ONCE(vif->bss_conf.assoc))
2262 return;
2263
2264 /*
2265 * iwl_mvm_protect_session() reads directly from the device
2266 * (the system time), so make sure it is available.
2267 */
2268 if (iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PREPARE_TX))
2269 return;
2270
2271 mutex_lock(&mvm->mutex);
2272 /* Try really hard to protect the session and hear a beacon */
2273 iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500, false);
2274 mutex_unlock(&mvm->mutex);
2275
2276 iwl_mvm_unref(mvm, IWL_MVM_REF_PREPARE_TX);
2277 }
2278
2279 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
2280 struct ieee80211_vif *vif,
2281 struct cfg80211_sched_scan_request *req,
2282 struct ieee80211_scan_ies *ies)
2283 {
2284 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2285 int ret;
2286
2287 if (!(mvm->fw->ucode_capa.capa[0] & IWL_UCODE_TLV_CAPA_UMAC_SCAN)) {
2288 ret = iwl_mvm_cancel_scan_wait_notif(mvm, IWL_MVM_SCAN_OS);
2289 if (ret)
2290 return ret;
2291 }
2292
2293 mutex_lock(&mvm->mutex);
2294
2295 /* Newest FW fixes sched scan while connected on another interface */
2296 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN) {
2297 if (!vif->bss_conf.idle) {
2298 ret = -EBUSY;
2299 goto out;
2300 }
2301 } else if (!iwl_mvm_is_idle(mvm)) {
2302 ret = -EBUSY;
2303 goto out;
2304 }
2305
2306 if (mvm->scan_status != IWL_MVM_SCAN_NONE) {
2307 ret = -EBUSY;
2308 goto out;
2309 }
2310
2311 ret = iwl_mvm_scan_offload_start(mvm, vif, req, ies);
2312 if (ret)
2313 mvm->scan_status = IWL_MVM_SCAN_NONE;
2314
2315 out:
2316 mutex_unlock(&mvm->mutex);
2317 return ret;
2318 }
2319
2320 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2321 struct ieee80211_vif *vif)
2322 {
2323 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2324 int ret;
2325
2326 mutex_lock(&mvm->mutex);
2327 ret = iwl_mvm_scan_offload_stop(mvm, false);
2328 mutex_unlock(&mvm->mutex);
2329 iwl_mvm_wait_for_async_handlers(mvm);
2330
2331 return ret;
2332
2333 }
2334
2335 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2336 enum set_key_cmd cmd,
2337 struct ieee80211_vif *vif,
2338 struct ieee80211_sta *sta,
2339 struct ieee80211_key_conf *key)
2340 {
2341 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2342 int ret;
2343
2344 if (iwlwifi_mod_params.sw_crypto) {
2345 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2346 return -EOPNOTSUPP;
2347 }
2348
2349 switch (key->cipher) {
2350 case WLAN_CIPHER_SUITE_TKIP:
2351 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2352 /* fall-through */
2353 case WLAN_CIPHER_SUITE_CCMP:
2354 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2355 break;
2356 case WLAN_CIPHER_SUITE_AES_CMAC:
2357 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2358 break;
2359 case WLAN_CIPHER_SUITE_WEP40:
2360 case WLAN_CIPHER_SUITE_WEP104:
2361 /* For non-client mode, only use WEP keys for TX as we probably
2362 * don't have a station yet anyway and would then have to keep
2363 * track of the keys, linking them to each of the clients/peers
2364 * as they appear. For now, don't do that, for performance WEP
2365 * offload doesn't really matter much, but we need it for some
2366 * other offload features in client mode.
2367 */
2368 if (vif->type != NL80211_IFTYPE_STATION)
2369 return 0;
2370 break;
2371 default:
2372 /* currently FW supports only one optional cipher scheme */
2373 if (hw->n_cipher_schemes &&
2374 hw->cipher_schemes->cipher == key->cipher)
2375 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2376 else
2377 return -EOPNOTSUPP;
2378 }
2379
2380 mutex_lock(&mvm->mutex);
2381
2382 switch (cmd) {
2383 case SET_KEY:
2384 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2385 vif->type == NL80211_IFTYPE_AP) && !sta) {
2386 /*
2387 * GTK on AP interface is a TX-only key, return 0;
2388 * on IBSS they're per-station and because we're lazy
2389 * we don't support them for RX, so do the same.
2390 */
2391 ret = 0;
2392 key->hw_key_idx = STA_KEY_IDX_INVALID;
2393 break;
2394 }
2395
2396 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2397 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2398 if (ret) {
2399 IWL_WARN(mvm, "set key failed\n");
2400 /*
2401 * can't add key for RX, but we don't need it
2402 * in the device for TX so still return 0
2403 */
2404 key->hw_key_idx = STA_KEY_IDX_INVALID;
2405 ret = 0;
2406 }
2407
2408 break;
2409 case DISABLE_KEY:
2410 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2411 ret = 0;
2412 break;
2413 }
2414
2415 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2416 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2417 break;
2418 default:
2419 ret = -EINVAL;
2420 }
2421
2422 mutex_unlock(&mvm->mutex);
2423 return ret;
2424 }
2425
2426 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2427 struct ieee80211_vif *vif,
2428 struct ieee80211_key_conf *keyconf,
2429 struct ieee80211_sta *sta,
2430 u32 iv32, u16 *phase1key)
2431 {
2432 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2433
2434 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2435 return;
2436
2437 iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2438 }
2439
2440
2441 static bool iwl_mvm_rx_aux_roc(struct iwl_notif_wait_data *notif_wait,
2442 struct iwl_rx_packet *pkt, void *data)
2443 {
2444 struct iwl_mvm *mvm =
2445 container_of(notif_wait, struct iwl_mvm, notif_wait);
2446 struct iwl_hs20_roc_res *resp;
2447 int resp_len = iwl_rx_packet_payload_len(pkt);
2448 struct iwl_mvm_time_event_data *te_data = data;
2449
2450 if (WARN_ON(pkt->hdr.cmd != HOT_SPOT_CMD))
2451 return true;
2452
2453 if (WARN_ON_ONCE(resp_len != sizeof(*resp))) {
2454 IWL_ERR(mvm, "Invalid HOT_SPOT_CMD response\n");
2455 return true;
2456 }
2457
2458 resp = (void *)pkt->data;
2459
2460 IWL_DEBUG_TE(mvm,
2461 "Aux ROC: Recieved response from ucode: status=%d uid=%d\n",
2462 resp->status, resp->event_unique_id);
2463
2464 te_data->uid = le32_to_cpu(resp->event_unique_id);
2465 IWL_DEBUG_TE(mvm, "TIME_EVENT_CMD response - UID = 0x%x\n",
2466 te_data->uid);
2467
2468 spin_lock_bh(&mvm->time_event_lock);
2469 list_add_tail(&te_data->list, &mvm->aux_roc_te_list);
2470 spin_unlock_bh(&mvm->time_event_lock);
2471
2472 return true;
2473 }
2474
2475 #define AUX_ROC_MAX_DELAY_ON_CHANNEL 5000
2476 static int iwl_mvm_send_aux_roc_cmd(struct iwl_mvm *mvm,
2477 struct ieee80211_channel *channel,
2478 struct ieee80211_vif *vif,
2479 int duration)
2480 {
2481 int res, time_reg = DEVICE_SYSTEM_TIME_REG;
2482 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2483 struct iwl_mvm_time_event_data *te_data = &mvmvif->hs_time_event_data;
2484 static const u8 time_event_response[] = { HOT_SPOT_CMD };
2485 struct iwl_notification_wait wait_time_event;
2486 struct iwl_hs20_roc_req aux_roc_req = {
2487 .action = cpu_to_le32(FW_CTXT_ACTION_ADD),
2488 .id_and_color =
2489 cpu_to_le32(FW_CMD_ID_AND_COLOR(MAC_INDEX_AUX, 0)),
2490 .sta_id_and_color = cpu_to_le32(mvm->aux_sta.sta_id),
2491 /* Set the channel info data */
2492 .channel_info.band = (channel->band == IEEE80211_BAND_2GHZ) ?
2493 PHY_BAND_24 : PHY_BAND_5,
2494 .channel_info.channel = channel->hw_value,
2495 .channel_info.width = PHY_VHT_CHANNEL_MODE20,
2496 /* Set the time and duration */
2497 .apply_time = cpu_to_le32(iwl_read_prph(mvm->trans, time_reg)),
2498 .apply_time_max_delay =
2499 cpu_to_le32(MSEC_TO_TU(AUX_ROC_MAX_DELAY_ON_CHANNEL)),
2500 .duration = cpu_to_le32(MSEC_TO_TU(duration)),
2501 };
2502
2503 /* Set the node address */
2504 memcpy(aux_roc_req.node_addr, vif->addr, ETH_ALEN);
2505
2506 lockdep_assert_held(&mvm->mutex);
2507
2508 spin_lock_bh(&mvm->time_event_lock);
2509
2510 if (WARN_ON(te_data->id == HOT_SPOT_CMD)) {
2511 spin_unlock_bh(&mvm->time_event_lock);
2512 return -EIO;
2513 }
2514
2515 te_data->vif = vif;
2516 te_data->duration = duration;
2517 te_data->id = HOT_SPOT_CMD;
2518
2519 spin_unlock_bh(&mvm->time_event_lock);
2520
2521 /*
2522 * Use a notification wait, which really just processes the
2523 * command response and doesn't wait for anything, in order
2524 * to be able to process the response and get the UID inside
2525 * the RX path. Using CMD_WANT_SKB doesn't work because it
2526 * stores the buffer and then wakes up this thread, by which
2527 * time another notification (that the time event started)
2528 * might already be processed unsuccessfully.
2529 */
2530 iwl_init_notification_wait(&mvm->notif_wait, &wait_time_event,
2531 time_event_response,
2532 ARRAY_SIZE(time_event_response),
2533 iwl_mvm_rx_aux_roc, te_data);
2534
2535 res = iwl_mvm_send_cmd_pdu(mvm, HOT_SPOT_CMD, 0, sizeof(aux_roc_req),
2536 &aux_roc_req);
2537
2538 if (res) {
2539 IWL_ERR(mvm, "Couldn't send HOT_SPOT_CMD: %d\n", res);
2540 iwl_remove_notification(&mvm->notif_wait, &wait_time_event);
2541 goto out_clear_te;
2542 }
2543
2544 /* No need to wait for anything, so just pass 1 (0 isn't valid) */
2545 res = iwl_wait_notification(&mvm->notif_wait, &wait_time_event, 1);
2546 /* should never fail */
2547 WARN_ON_ONCE(res);
2548
2549 if (res) {
2550 out_clear_te:
2551 spin_lock_bh(&mvm->time_event_lock);
2552 iwl_mvm_te_clear_data(mvm, te_data);
2553 spin_unlock_bh(&mvm->time_event_lock);
2554 }
2555
2556 return res;
2557 }
2558
2559 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2560 struct ieee80211_vif *vif,
2561 struct ieee80211_channel *channel,
2562 int duration,
2563 enum ieee80211_roc_type type)
2564 {
2565 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2566 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2567 struct cfg80211_chan_def chandef;
2568 struct iwl_mvm_phy_ctxt *phy_ctxt;
2569 int ret, i;
2570
2571 IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2572 duration, type);
2573
2574 mutex_lock(&mvm->mutex);
2575
2576 switch (vif->type) {
2577 case NL80211_IFTYPE_STATION:
2578 if (mvm->fw->ucode_capa.capa[0] &
2579 IWL_UCODE_TLV_CAPA_HOTSPOT_SUPPORT) {
2580 /* Use aux roc framework (HS20) */
2581 ret = iwl_mvm_send_aux_roc_cmd(mvm, channel,
2582 vif, duration);
2583 goto out_unlock;
2584 }
2585 IWL_ERR(mvm, "hotspot not supported\n");
2586 ret = -EINVAL;
2587 goto out_unlock;
2588 case NL80211_IFTYPE_P2P_DEVICE:
2589 /* handle below */
2590 break;
2591 default:
2592 IWL_ERR(mvm, "vif isn't P2P_DEVICE: %d\n", vif->type);
2593 ret = -EINVAL;
2594 goto out_unlock;
2595 }
2596
2597 for (i = 0; i < NUM_PHY_CTX; i++) {
2598 phy_ctxt = &mvm->phy_ctxts[i];
2599 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2600 continue;
2601
2602 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2603 /*
2604 * Unbind the P2P_DEVICE from the current PHY context,
2605 * and if the PHY context is not used remove it.
2606 */
2607 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2608 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2609 goto out_unlock;
2610
2611 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2612
2613 /* Bind the P2P_DEVICE to the current PHY Context */
2614 mvmvif->phy_ctxt = phy_ctxt;
2615
2616 ret = iwl_mvm_binding_add_vif(mvm, vif);
2617 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2618 goto out_unlock;
2619
2620 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2621 goto schedule_time_event;
2622 }
2623 }
2624
2625 /* Need to update the PHY context only if the ROC channel changed */
2626 if (channel == mvmvif->phy_ctxt->channel)
2627 goto schedule_time_event;
2628
2629 cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2630
2631 /*
2632 * Change the PHY context configuration as it is currently referenced
2633 * only by the P2P Device MAC
2634 */
2635 if (mvmvif->phy_ctxt->ref == 1) {
2636 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2637 &chandef, 1, 1);
2638 if (ret)
2639 goto out_unlock;
2640 } else {
2641 /*
2642 * The PHY context is shared with other MACs. Need to remove the
2643 * P2P Device from the binding, allocate an new PHY context and
2644 * create a new binding
2645 */
2646 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2647 if (!phy_ctxt) {
2648 ret = -ENOSPC;
2649 goto out_unlock;
2650 }
2651
2652 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2653 1, 1);
2654 if (ret) {
2655 IWL_ERR(mvm, "Failed to change PHY context\n");
2656 goto out_unlock;
2657 }
2658
2659 /* Unbind the P2P_DEVICE from the current PHY context */
2660 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2661 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2662 goto out_unlock;
2663
2664 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2665
2666 /* Bind the P2P_DEVICE to the new allocated PHY context */
2667 mvmvif->phy_ctxt = phy_ctxt;
2668
2669 ret = iwl_mvm_binding_add_vif(mvm, vif);
2670 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2671 goto out_unlock;
2672
2673 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2674 }
2675
2676 schedule_time_event:
2677 /* Schedule the time events */
2678 ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2679
2680 out_unlock:
2681 mutex_unlock(&mvm->mutex);
2682 IWL_DEBUG_MAC80211(mvm, "leave\n");
2683 return ret;
2684 }
2685
2686 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2687 {
2688 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2689
2690 IWL_DEBUG_MAC80211(mvm, "enter\n");
2691
2692 mutex_lock(&mvm->mutex);
2693 iwl_mvm_stop_roc(mvm);
2694 mutex_unlock(&mvm->mutex);
2695
2696 IWL_DEBUG_MAC80211(mvm, "leave\n");
2697 return 0;
2698 }
2699
2700 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2701 struct ieee80211_chanctx_conf *ctx)
2702 {
2703 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2704 struct iwl_mvm_phy_ctxt *phy_ctxt;
2705 int ret;
2706
2707 lockdep_assert_held(&mvm->mutex);
2708
2709 IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2710
2711 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2712 if (!phy_ctxt) {
2713 ret = -ENOSPC;
2714 goto out;
2715 }
2716
2717 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2718 ctx->rx_chains_static,
2719 ctx->rx_chains_dynamic);
2720 if (ret) {
2721 IWL_ERR(mvm, "Failed to add PHY context\n");
2722 goto out;
2723 }
2724
2725 iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2726 *phy_ctxt_id = phy_ctxt->id;
2727 out:
2728 return ret;
2729 }
2730
2731 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2732 struct ieee80211_chanctx_conf *ctx)
2733 {
2734 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2735 int ret;
2736
2737 mutex_lock(&mvm->mutex);
2738 ret = __iwl_mvm_add_chanctx(mvm, ctx);
2739 mutex_unlock(&mvm->mutex);
2740
2741 return ret;
2742 }
2743
2744 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2745 struct ieee80211_chanctx_conf *ctx)
2746 {
2747 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2748 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2749
2750 lockdep_assert_held(&mvm->mutex);
2751
2752 iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2753 }
2754
2755 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2756 struct ieee80211_chanctx_conf *ctx)
2757 {
2758 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2759
2760 mutex_lock(&mvm->mutex);
2761 __iwl_mvm_remove_chanctx(mvm, ctx);
2762 mutex_unlock(&mvm->mutex);
2763 }
2764
2765 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2766 struct ieee80211_chanctx_conf *ctx,
2767 u32 changed)
2768 {
2769 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2770 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2771 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2772
2773 if (WARN_ONCE((phy_ctxt->ref > 1) &&
2774 (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2775 IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2776 IEEE80211_CHANCTX_CHANGE_RADAR |
2777 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2778 "Cannot change PHY. Ref=%d, changed=0x%X\n",
2779 phy_ctxt->ref, changed))
2780 return;
2781
2782 mutex_lock(&mvm->mutex);
2783 iwl_mvm_bt_coex_vif_change(mvm);
2784 iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2785 ctx->rx_chains_static,
2786 ctx->rx_chains_dynamic);
2787 mutex_unlock(&mvm->mutex);
2788 }
2789
2790 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2791 struct ieee80211_vif *vif,
2792 struct ieee80211_chanctx_conf *ctx,
2793 bool switching_chanctx)
2794 {
2795 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2796 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2797 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2798 int ret;
2799
2800 lockdep_assert_held(&mvm->mutex);
2801
2802 mvmvif->phy_ctxt = phy_ctxt;
2803
2804 switch (vif->type) {
2805 case NL80211_IFTYPE_AP:
2806 /* only needed if we're switching chanctx (i.e. during CSA) */
2807 if (switching_chanctx) {
2808 mvmvif->ap_ibss_active = true;
2809 break;
2810 }
2811 case NL80211_IFTYPE_ADHOC:
2812 /*
2813 * The AP binding flow is handled as part of the start_ap flow
2814 * (in bss_info_changed), similarly for IBSS.
2815 */
2816 ret = 0;
2817 goto out;
2818 case NL80211_IFTYPE_STATION:
2819 break;
2820 case NL80211_IFTYPE_MONITOR:
2821 /* always disable PS when a monitor interface is active */
2822 mvmvif->ps_disabled = true;
2823 break;
2824 default:
2825 ret = -EINVAL;
2826 goto out;
2827 }
2828
2829 ret = iwl_mvm_binding_add_vif(mvm, vif);
2830 if (ret)
2831 goto out;
2832
2833 /*
2834 * Power state must be updated before quotas,
2835 * otherwise fw will complain.
2836 */
2837 iwl_mvm_power_update_mac(mvm);
2838
2839 /* Setting the quota at this stage is only required for monitor
2840 * interfaces. For the other types, the bss_info changed flow
2841 * will handle quota settings.
2842 */
2843 if (vif->type == NL80211_IFTYPE_MONITOR) {
2844 mvmvif->monitor_active = true;
2845 ret = iwl_mvm_update_quotas(mvm, NULL);
2846 if (ret)
2847 goto out_remove_binding;
2848 }
2849
2850 /* Handle binding during CSA */
2851 if (vif->type == NL80211_IFTYPE_AP) {
2852 iwl_mvm_update_quotas(mvm, NULL);
2853 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
2854 }
2855
2856 if (switching_chanctx && vif->type == NL80211_IFTYPE_STATION) {
2857 u32 duration = 2 * vif->bss_conf.beacon_int;
2858
2859 /* iwl_mvm_protect_session() reads directly from the
2860 * device (the system time), so make sure it is
2861 * available.
2862 */
2863 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_PROTECT_CSA);
2864 if (ret)
2865 goto out_remove_binding;
2866
2867 /* Protect the session to make sure we hear the first
2868 * beacon on the new channel.
2869 */
2870 iwl_mvm_protect_session(mvm, vif, duration, duration,
2871 vif->bss_conf.beacon_int / 2,
2872 true);
2873
2874 iwl_mvm_unref(mvm, IWL_MVM_REF_PROTECT_CSA);
2875
2876 iwl_mvm_update_quotas(mvm, NULL);
2877 }
2878
2879 goto out;
2880
2881 out_remove_binding:
2882 iwl_mvm_binding_remove_vif(mvm, vif);
2883 iwl_mvm_power_update_mac(mvm);
2884 out:
2885 if (ret)
2886 mvmvif->phy_ctxt = NULL;
2887 return ret;
2888 }
2889 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2890 struct ieee80211_vif *vif,
2891 struct ieee80211_chanctx_conf *ctx)
2892 {
2893 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2894 int ret;
2895
2896 mutex_lock(&mvm->mutex);
2897 ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2898 mutex_unlock(&mvm->mutex);
2899
2900 return ret;
2901 }
2902
2903 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2904 struct ieee80211_vif *vif,
2905 struct ieee80211_chanctx_conf *ctx,
2906 bool switching_chanctx)
2907 {
2908 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2909 struct ieee80211_vif *disabled_vif = NULL;
2910
2911 lockdep_assert_held(&mvm->mutex);
2912
2913 iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2914
2915 switch (vif->type) {
2916 case NL80211_IFTYPE_ADHOC:
2917 goto out;
2918 case NL80211_IFTYPE_MONITOR:
2919 mvmvif->monitor_active = false;
2920 mvmvif->ps_disabled = false;
2921 break;
2922 case NL80211_IFTYPE_AP:
2923 /* This part is triggered only during CSA */
2924 if (!switching_chanctx || !mvmvif->ap_ibss_active)
2925 goto out;
2926
2927 mvmvif->csa_countdown = false;
2928
2929 /* Set CS bit on all the stations */
2930 iwl_mvm_modify_all_sta_disable_tx(mvm, mvmvif, true);
2931
2932 /* Save blocked iface, the timeout is set on the next beacon */
2933 rcu_assign_pointer(mvm->csa_tx_blocked_vif, vif);
2934
2935 mvmvif->ap_ibss_active = false;
2936 break;
2937 case NL80211_IFTYPE_STATION:
2938 if (!switching_chanctx)
2939 break;
2940
2941 disabled_vif = vif;
2942
2943 iwl_mvm_mac_ctxt_changed(mvm, vif, true, NULL);
2944 break;
2945 default:
2946 break;
2947 }
2948
2949 iwl_mvm_update_quotas(mvm, disabled_vif);
2950 iwl_mvm_binding_remove_vif(mvm, vif);
2951
2952 out:
2953 mvmvif->phy_ctxt = NULL;
2954 iwl_mvm_power_update_mac(mvm);
2955 }
2956
2957 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2958 struct ieee80211_vif *vif,
2959 struct ieee80211_chanctx_conf *ctx)
2960 {
2961 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2962
2963 mutex_lock(&mvm->mutex);
2964 __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2965 mutex_unlock(&mvm->mutex);
2966 }
2967
2968 static int
2969 iwl_mvm_switch_vif_chanctx_swap(struct iwl_mvm *mvm,
2970 struct ieee80211_vif_chanctx_switch *vifs)
2971 {
2972 int ret;
2973
2974 mutex_lock(&mvm->mutex);
2975 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2976 __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2977
2978 ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2979 if (ret) {
2980 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2981 goto out_reassign;
2982 }
2983
2984 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2985 true);
2986 if (ret) {
2987 IWL_ERR(mvm,
2988 "failed to assign new_ctx during channel switch\n");
2989 goto out_remove;
2990 }
2991
2992 /* we don't support TDLS during DCM - can be caused by channel switch */
2993 if (iwl_mvm_phy_ctx_count(mvm) > 1)
2994 iwl_mvm_teardown_tdls_peers(mvm);
2995
2996 goto out;
2997
2998 out_remove:
2999 __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
3000
3001 out_reassign:
3002 if (__iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx)) {
3003 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
3004 goto out_restart;
3005 }
3006
3007 if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3008 true)) {
3009 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3010 goto out_restart;
3011 }
3012
3013 goto out;
3014
3015 out_restart:
3016 /* things keep failing, better restart the hw */
3017 iwl_mvm_nic_restart(mvm, false);
3018
3019 out:
3020 mutex_unlock(&mvm->mutex);
3021
3022 return ret;
3023 }
3024
3025 static int
3026 iwl_mvm_switch_vif_chanctx_reassign(struct iwl_mvm *mvm,
3027 struct ieee80211_vif_chanctx_switch *vifs)
3028 {
3029 int ret;
3030
3031 mutex_lock(&mvm->mutex);
3032 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
3033
3034 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
3035 true);
3036 if (ret) {
3037 IWL_ERR(mvm,
3038 "failed to assign new_ctx during channel switch\n");
3039 goto out_reassign;
3040 }
3041
3042 goto out;
3043
3044 out_reassign:
3045 if (__iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
3046 true)) {
3047 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
3048 goto out_restart;
3049 }
3050
3051 goto out;
3052
3053 out_restart:
3054 /* things keep failing, better restart the hw */
3055 iwl_mvm_nic_restart(mvm, false);
3056
3057 out:
3058 mutex_unlock(&mvm->mutex);
3059
3060 return ret;
3061 }
3062
3063 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
3064 struct ieee80211_vif_chanctx_switch *vifs,
3065 int n_vifs,
3066 enum ieee80211_chanctx_switch_mode mode)
3067 {
3068 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3069 int ret;
3070
3071 /* we only support a single-vif right now */
3072 if (n_vifs > 1)
3073 return -EOPNOTSUPP;
3074
3075 switch (mode) {
3076 case CHANCTX_SWMODE_SWAP_CONTEXTS:
3077 ret = iwl_mvm_switch_vif_chanctx_swap(mvm, vifs);
3078 break;
3079 case CHANCTX_SWMODE_REASSIGN_VIF:
3080 ret = iwl_mvm_switch_vif_chanctx_reassign(mvm, vifs);
3081 break;
3082 default:
3083 ret = -EOPNOTSUPP;
3084 break;
3085 }
3086
3087 return ret;
3088 }
3089
3090 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
3091 struct ieee80211_sta *sta,
3092 bool set)
3093 {
3094 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3095 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
3096
3097 if (!mvm_sta || !mvm_sta->vif) {
3098 IWL_ERR(mvm, "Station is not associated to a vif\n");
3099 return -EINVAL;
3100 }
3101
3102 return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
3103 }
3104
3105 #ifdef CONFIG_NL80211_TESTMODE
3106 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
3107 [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
3108 [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
3109 [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
3110 };
3111
3112 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
3113 struct ieee80211_vif *vif,
3114 void *data, int len)
3115 {
3116 struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
3117 int err;
3118 u32 noa_duration;
3119
3120 err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
3121 if (err)
3122 return err;
3123
3124 if (!tb[IWL_MVM_TM_ATTR_CMD])
3125 return -EINVAL;
3126
3127 switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
3128 case IWL_MVM_TM_CMD_SET_NOA:
3129 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
3130 !vif->bss_conf.enable_beacon ||
3131 !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
3132 return -EINVAL;
3133
3134 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
3135 if (noa_duration >= vif->bss_conf.beacon_int)
3136 return -EINVAL;
3137
3138 mvm->noa_duration = noa_duration;
3139 mvm->noa_vif = vif;
3140
3141 return iwl_mvm_update_quotas(mvm, NULL);
3142 case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
3143 /* must be associated client vif - ignore authorized */
3144 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
3145 !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
3146 !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
3147 return -EINVAL;
3148
3149 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
3150 return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3151 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3152 }
3153
3154 return -EOPNOTSUPP;
3155 }
3156
3157 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
3158 struct ieee80211_vif *vif,
3159 void *data, int len)
3160 {
3161 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3162 int err;
3163
3164 mutex_lock(&mvm->mutex);
3165 err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
3166 mutex_unlock(&mvm->mutex);
3167
3168 return err;
3169 }
3170 #endif
3171
3172 static void iwl_mvm_channel_switch(struct ieee80211_hw *hw,
3173 struct ieee80211_vif *vif,
3174 struct ieee80211_channel_switch *chsw)
3175 {
3176 /* By implementing this operation, we prevent mac80211 from
3177 * starting its own channel switch timer, so that we can call
3178 * ieee80211_chswitch_done() ourselves at the right time
3179 * (which is when the absence time event starts).
3180 */
3181
3182 IWL_DEBUG_MAC80211(IWL_MAC80211_GET_MVM(hw),
3183 "dummy channel switch op\n");
3184 }
3185
3186 static int iwl_mvm_pre_channel_switch(struct ieee80211_hw *hw,
3187 struct ieee80211_vif *vif,
3188 struct ieee80211_channel_switch *chsw)
3189 {
3190 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3191 struct ieee80211_vif *csa_vif;
3192 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3193 u32 apply_time;
3194 int ret;
3195
3196 mutex_lock(&mvm->mutex);
3197
3198 IWL_DEBUG_MAC80211(mvm, "pre CSA to freq %d\n",
3199 chsw->chandef.center_freq1);
3200
3201 switch (vif->type) {
3202 case NL80211_IFTYPE_AP:
3203 csa_vif =
3204 rcu_dereference_protected(mvm->csa_vif,
3205 lockdep_is_held(&mvm->mutex));
3206 if (WARN_ONCE(csa_vif && csa_vif->csa_active,
3207 "Another CSA is already in progress")) {
3208 ret = -EBUSY;
3209 goto out_unlock;
3210 }
3211
3212 rcu_assign_pointer(mvm->csa_vif, vif);
3213
3214 if (WARN_ONCE(mvmvif->csa_countdown,
3215 "Previous CSA countdown didn't complete")) {
3216 ret = -EBUSY;
3217 goto out_unlock;
3218 }
3219
3220 break;
3221 case NL80211_IFTYPE_STATION:
3222 /* Schedule the time event to a bit before beacon 1,
3223 * to make sure we're in the new channel when the
3224 * GO/AP arrives.
3225 */
3226 apply_time = chsw->device_timestamp +
3227 ((vif->bss_conf.beacon_int * (chsw->count - 1) -
3228 IWL_MVM_CHANNEL_SWITCH_TIME_CLIENT) * 1024);
3229
3230 if (chsw->block_tx)
3231 iwl_mvm_csa_client_absent(mvm, vif);
3232
3233 iwl_mvm_schedule_csa_period(mvm, vif, vif->bss_conf.beacon_int,
3234 apply_time);
3235 if (mvmvif->bf_data.bf_enabled) {
3236 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
3237 if (ret)
3238 goto out_unlock;
3239 }
3240
3241 break;
3242 default:
3243 break;
3244 }
3245
3246 mvmvif->ps_disabled = true;
3247
3248 ret = iwl_mvm_power_update_ps(mvm);
3249 if (ret)
3250 goto out_unlock;
3251
3252 /* we won't be on this channel any longer */
3253 iwl_mvm_teardown_tdls_peers(mvm);
3254
3255 out_unlock:
3256 mutex_unlock(&mvm->mutex);
3257
3258 return ret;
3259 }
3260
3261 static int iwl_mvm_post_channel_switch(struct ieee80211_hw *hw,
3262 struct ieee80211_vif *vif)
3263 {
3264 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
3265 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3266 int ret;
3267
3268 mutex_lock(&mvm->mutex);
3269
3270 if (vif->type == NL80211_IFTYPE_STATION) {
3271 struct iwl_mvm_sta *mvmsta;
3272
3273 mvmsta = iwl_mvm_sta_from_staid_protected(mvm,
3274 mvmvif->ap_sta_id);
3275
3276 if (WARN_ON(!mvmsta)) {
3277 ret = -EIO;
3278 goto out_unlock;
3279 }
3280
3281 iwl_mvm_sta_modify_disable_tx(mvm, mvmsta, false);
3282
3283 iwl_mvm_mac_ctxt_changed(mvm, vif, false, NULL);
3284
3285 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
3286 if (ret)
3287 goto out_unlock;
3288
3289 iwl_mvm_stop_session_protection(mvm, vif);
3290 }
3291
3292 mvmvif->ps_disabled = false;
3293
3294 ret = iwl_mvm_power_update_ps(mvm);
3295
3296 out_unlock:
3297 mutex_unlock(&mvm->mutex);
3298
3299 return ret;
3300 }
3301
3302 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
3303 struct ieee80211_vif *vif, u32 queues, bool drop)
3304 {
3305 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
3306 struct iwl_mvm_vif *mvmvif;
3307 struct iwl_mvm_sta *mvmsta;
3308 struct ieee80211_sta *sta;
3309 int i;
3310 u32 msk = 0;
3311
3312 if (!vif || vif->type != NL80211_IFTYPE_STATION)
3313 return;
3314
3315 mutex_lock(&mvm->mutex);
3316 mvmvif = iwl_mvm_vif_from_mac80211(vif);
3317
3318 /* flush the AP-station and all TDLS peers */
3319 for (i = 0; i < IWL_MVM_STATION_COUNT; i++) {
3320 sta = rcu_dereference_protected(mvm->fw_id_to_mac_id[i],
3321 lockdep_is_held(&mvm->mutex));
3322 if (IS_ERR_OR_NULL(sta))
3323 continue;
3324
3325 mvmsta = iwl_mvm_sta_from_mac80211(sta);
3326 if (mvmsta->vif != vif)
3327 continue;
3328
3329 /* make sure only TDLS peers or the AP are flushed */
3330 WARN_ON(i != mvmvif->ap_sta_id && !sta->tdls);
3331
3332 msk |= mvmsta->tfd_queue_msk;
3333 }
3334
3335 if (drop) {
3336 if (iwl_mvm_flush_tx_path(mvm, msk, true))
3337 IWL_ERR(mvm, "flush request fail\n");
3338 mutex_unlock(&mvm->mutex);
3339 } else {
3340 mutex_unlock(&mvm->mutex);
3341
3342 /* this can take a while, and we may need/want other operations
3343 * to succeed while doing this, so do it without the mutex held
3344 */
3345 iwl_trans_wait_tx_queue_empty(mvm->trans, msk);
3346 }
3347 }
3348
3349 const struct ieee80211_ops iwl_mvm_hw_ops = {
3350 .tx = iwl_mvm_mac_tx,
3351 .ampdu_action = iwl_mvm_mac_ampdu_action,
3352 .start = iwl_mvm_mac_start,
3353 .reconfig_complete = iwl_mvm_mac_reconfig_complete,
3354 .stop = iwl_mvm_mac_stop,
3355 .add_interface = iwl_mvm_mac_add_interface,
3356 .remove_interface = iwl_mvm_mac_remove_interface,
3357 .config = iwl_mvm_mac_config,
3358 .prepare_multicast = iwl_mvm_prepare_multicast,
3359 .configure_filter = iwl_mvm_configure_filter,
3360 .bss_info_changed = iwl_mvm_bss_info_changed,
3361 .hw_scan = iwl_mvm_mac_hw_scan,
3362 .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
3363 .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
3364 .sta_state = iwl_mvm_mac_sta_state,
3365 .sta_notify = iwl_mvm_mac_sta_notify,
3366 .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
3367 .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
3368 .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
3369 .sta_rc_update = iwl_mvm_sta_rc_update,
3370 .conf_tx = iwl_mvm_mac_conf_tx,
3371 .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
3372 .mgd_protect_tdls_discover = iwl_mvm_mac_mgd_protect_tdls_discover,
3373 .flush = iwl_mvm_mac_flush,
3374 .sched_scan_start = iwl_mvm_mac_sched_scan_start,
3375 .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
3376 .set_key = iwl_mvm_mac_set_key,
3377 .update_tkip_key = iwl_mvm_mac_update_tkip_key,
3378 .remain_on_channel = iwl_mvm_roc,
3379 .cancel_remain_on_channel = iwl_mvm_cancel_roc,
3380 .add_chanctx = iwl_mvm_add_chanctx,
3381 .remove_chanctx = iwl_mvm_remove_chanctx,
3382 .change_chanctx = iwl_mvm_change_chanctx,
3383 .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
3384 .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
3385 .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
3386
3387 .start_ap = iwl_mvm_start_ap_ibss,
3388 .stop_ap = iwl_mvm_stop_ap_ibss,
3389 .join_ibss = iwl_mvm_start_ap_ibss,
3390 .leave_ibss = iwl_mvm_stop_ap_ibss,
3391
3392 .set_tim = iwl_mvm_set_tim,
3393
3394 .channel_switch = iwl_mvm_channel_switch,
3395 .pre_channel_switch = iwl_mvm_pre_channel_switch,
3396 .post_channel_switch = iwl_mvm_post_channel_switch,
3397
3398 .tdls_channel_switch = iwl_mvm_tdls_channel_switch,
3399 .tdls_cancel_channel_switch = iwl_mvm_tdls_cancel_channel_switch,
3400 .tdls_recv_channel_switch = iwl_mvm_tdls_recv_channel_switch,
3401
3402 CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
3403
3404 #ifdef CONFIG_PM_SLEEP
3405 /* look at d3.c */
3406 .suspend = iwl_mvm_suspend,
3407 .resume = iwl_mvm_resume,
3408 .set_wakeup = iwl_mvm_set_wakeup,
3409 .set_rekey_data = iwl_mvm_set_rekey_data,
3410 #if IS_ENABLED(CONFIG_IPV6)
3411 .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
3412 #endif
3413 .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
3414 #endif
3415 };
Linux with added FPC-III support