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iwlwifi: mvm: Reflect GO channel switch in NoA
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / mvm / mac80211.c
1 /******************************************************************************
2 *
3 * This file is provided under a dual BSD/GPLv2 license. When using or
4 * redistributing this file, you may do so under either license.
5 *
6 * GPL LICENSE SUMMARY
7 *
8 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of version 2 of the GNU General Public License as
12 * published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
22 * USA
23 *
24 * The full GNU General Public License is included in this distribution
25 * in the file called COPYING.
26 *
27 * Contact Information:
28 * Intel Linux Wireless <ilw@linux.intel.com>
29 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
30 *
31 * BSD LICENSE
32 *
33 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.
34 * All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 *
40 * * Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * * Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in
44 * the documentation and/or other materials provided with the
45 * distribution.
46 * * Neither the name Intel Corporation nor the names of its
47 * contributors may be used to endorse or promote products derived
48 * from this software without specific prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
51 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
52 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
53 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
54 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
55 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
56 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
57 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
58 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
59 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
61 *
62 *****************************************************************************/
63 #include <linux/kernel.h>
64 #include <linux/slab.h>
65 #include <linux/skbuff.h>
66 #include <linux/netdevice.h>
67 #include <linux/etherdevice.h>
68 #include <linux/ip.h>
69 #include <linux/if_arp.h>
70 #include <net/mac80211.h>
71 #include <net/ieee80211_radiotap.h>
72 #include <net/tcp.h>
73
74 #include "iwl-op-mode.h"
75 #include "iwl-io.h"
76 #include "mvm.h"
77 #include "sta.h"
78 #include "time-event.h"
79 #include "iwl-eeprom-parse.h"
80 #include "fw-api-scan.h"
81 #include "iwl-phy-db.h"
82 #include "testmode.h"
83 #include "iwl-fw-error-dump.h"
84 #include "iwl-prph.h"
85
86 static const struct ieee80211_iface_limit iwl_mvm_limits[] = {
87 {
88 .max = 1,
89 .types = BIT(NL80211_IFTYPE_STATION),
90 },
91 {
92 .max = 1,
93 .types = BIT(NL80211_IFTYPE_AP) |
94 BIT(NL80211_IFTYPE_P2P_CLIENT) |
95 BIT(NL80211_IFTYPE_P2P_GO),
96 },
97 {
98 .max = 1,
99 .types = BIT(NL80211_IFTYPE_P2P_DEVICE),
100 },
101 };
102
103 static const struct ieee80211_iface_combination iwl_mvm_iface_combinations[] = {
104 {
105 .num_different_channels = 1,
106 .max_interfaces = 3,
107 .limits = iwl_mvm_limits,
108 .n_limits = ARRAY_SIZE(iwl_mvm_limits),
109 },
110 };
111
112 #ifdef CONFIG_PM_SLEEP
113 static const struct nl80211_wowlan_tcp_data_token_feature
114 iwl_mvm_wowlan_tcp_token_feature = {
115 .min_len = 0,
116 .max_len = 255,
117 .bufsize = IWL_WOWLAN_REMOTE_WAKE_MAX_TOKENS,
118 };
119
120 static const struct wiphy_wowlan_tcp_support iwl_mvm_wowlan_tcp_support = {
121 .tok = &iwl_mvm_wowlan_tcp_token_feature,
122 .data_payload_max = IWL_WOWLAN_TCP_MAX_PACKET_LEN -
123 sizeof(struct ethhdr) -
124 sizeof(struct iphdr) -
125 sizeof(struct tcphdr),
126 .data_interval_max = 65535, /* __le16 in API */
127 .wake_payload_max = IWL_WOWLAN_REMOTE_WAKE_MAX_PACKET_LEN -
128 sizeof(struct ethhdr) -
129 sizeof(struct iphdr) -
130 sizeof(struct tcphdr),
131 .seq = true,
132 };
133 #endif
134
135 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
136 /*
137 * Use the reserved field to indicate magic values.
138 * these values will only be used internally by the driver,
139 * and won't make it to the fw (reserved will be 0).
140 * BC_FILTER_MAGIC_IP - configure the val of this attribute to
141 * be the vif's ip address. in case there is not a single
142 * ip address (0, or more than 1), this attribute will
143 * be skipped.
144 * BC_FILTER_MAGIC_MAC - set the val of this attribute to
145 * the LSB bytes of the vif's mac address
146 */
147 enum {
148 BC_FILTER_MAGIC_NONE = 0,
149 BC_FILTER_MAGIC_IP,
150 BC_FILTER_MAGIC_MAC,
151 };
152
153 static const struct iwl_fw_bcast_filter iwl_mvm_default_bcast_filters[] = {
154 {
155 /* arp */
156 .discard = 0,
157 .frame_type = BCAST_FILTER_FRAME_TYPE_ALL,
158 .attrs = {
159 {
160 /* frame type - arp, hw type - ethernet */
161 .offset_type =
162 BCAST_FILTER_OFFSET_PAYLOAD_START,
163 .offset = sizeof(rfc1042_header),
164 .val = cpu_to_be32(0x08060001),
165 .mask = cpu_to_be32(0xffffffff),
166 },
167 {
168 /* arp dest ip */
169 .offset_type =
170 BCAST_FILTER_OFFSET_PAYLOAD_START,
171 .offset = sizeof(rfc1042_header) + 2 +
172 sizeof(struct arphdr) +
173 ETH_ALEN + sizeof(__be32) +
174 ETH_ALEN,
175 .mask = cpu_to_be32(0xffffffff),
176 /* mark it as special field */
177 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_IP),
178 },
179 },
180 },
181 {
182 /* dhcp offer bcast */
183 .discard = 0,
184 .frame_type = BCAST_FILTER_FRAME_TYPE_IPV4,
185 .attrs = {
186 {
187 /* udp dest port - 68 (bootp client)*/
188 .offset_type = BCAST_FILTER_OFFSET_IP_END,
189 .offset = offsetof(struct udphdr, dest),
190 .val = cpu_to_be32(0x00440000),
191 .mask = cpu_to_be32(0xffff0000),
192 },
193 {
194 /* dhcp - lsb bytes of client hw address */
195 .offset_type = BCAST_FILTER_OFFSET_IP_END,
196 .offset = 38,
197 .mask = cpu_to_be32(0xffffffff),
198 /* mark it as special field */
199 .reserved1 = cpu_to_le16(BC_FILTER_MAGIC_MAC),
200 },
201 },
202 },
203 /* last filter must be empty */
204 {},
205 };
206 #endif
207
208 void iwl_mvm_ref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
209 {
210 if (!iwl_mvm_is_d0i3_supported(mvm))
211 return;
212
213 IWL_DEBUG_RPM(mvm, "Take mvm reference - type %d\n", ref_type);
214 WARN_ON(test_and_set_bit(ref_type, mvm->ref_bitmap));
215 iwl_trans_ref(mvm->trans);
216 }
217
218 void iwl_mvm_unref(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
219 {
220 if (!iwl_mvm_is_d0i3_supported(mvm))
221 return;
222
223 IWL_DEBUG_RPM(mvm, "Leave mvm reference - type %d\n", ref_type);
224 WARN_ON(!test_and_clear_bit(ref_type, mvm->ref_bitmap));
225 iwl_trans_unref(mvm->trans);
226 }
227
228 static void
229 iwl_mvm_unref_all_except(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref)
230 {
231 int i;
232
233 if (!iwl_mvm_is_d0i3_supported(mvm))
234 return;
235
236 for_each_set_bit(i, mvm->ref_bitmap, IWL_MVM_REF_COUNT) {
237 if (ref == i)
238 continue;
239
240 IWL_DEBUG_RPM(mvm, "Cleanup: remove mvm ref type %d\n", i);
241 clear_bit(i, mvm->ref_bitmap);
242 iwl_trans_unref(mvm->trans);
243 }
244 }
245
246 static int iwl_mvm_ref_sync(struct iwl_mvm *mvm, enum iwl_mvm_ref_type ref_type)
247 {
248 iwl_mvm_ref(mvm, ref_type);
249
250 if (!wait_event_timeout(mvm->d0i3_exit_waitq,
251 !test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status),
252 HZ)) {
253 WARN_ON_ONCE(1);
254 iwl_mvm_unref(mvm, ref_type);
255 return -EIO;
256 }
257
258 return 0;
259 }
260
261 static void iwl_mvm_reset_phy_ctxts(struct iwl_mvm *mvm)
262 {
263 int i;
264
265 memset(mvm->phy_ctxts, 0, sizeof(mvm->phy_ctxts));
266 for (i = 0; i < NUM_PHY_CTX; i++) {
267 mvm->phy_ctxts[i].id = i;
268 mvm->phy_ctxts[i].ref = 0;
269 }
270 }
271
272 static int iwl_mvm_max_scan_ie_len(struct iwl_mvm *mvm)
273 {
274 /* we create the 802.11 header and SSID element */
275 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID)
276 return mvm->fw->ucode_capa.max_probe_length - 24 - 2;
277 return mvm->fw->ucode_capa.max_probe_length - 24 - 34;
278 }
279
280 int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
281 {
282 struct ieee80211_hw *hw = mvm->hw;
283 int num_mac, ret, i;
284
285 /* Tell mac80211 our characteristics */
286 hw->flags = IEEE80211_HW_SIGNAL_DBM |
287 IEEE80211_HW_SPECTRUM_MGMT |
288 IEEE80211_HW_REPORTS_TX_ACK_STATUS |
289 IEEE80211_HW_QUEUE_CONTROL |
290 IEEE80211_HW_WANT_MONITOR_VIF |
291 IEEE80211_HW_SUPPORTS_PS |
292 IEEE80211_HW_SUPPORTS_DYNAMIC_PS |
293 IEEE80211_HW_AMPDU_AGGREGATION |
294 IEEE80211_HW_TIMING_BEACON_ONLY |
295 IEEE80211_HW_CONNECTION_MONITOR |
296 IEEE80211_HW_CHANCTX_STA_CSA |
297 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
298 IEEE80211_HW_SUPPORTS_STATIC_SMPS;
299
300 hw->queues = mvm->first_agg_queue;
301 hw->offchannel_tx_hw_queue = IWL_MVM_OFFCHANNEL_QUEUE;
302 hw->radiotap_mcs_details |= IEEE80211_RADIOTAP_MCS_HAVE_FEC |
303 IEEE80211_RADIOTAP_MCS_HAVE_STBC;
304 hw->radiotap_vht_details |= IEEE80211_RADIOTAP_VHT_KNOWN_STBC;
305 hw->rate_control_algorithm = "iwl-mvm-rs";
306
307 /*
308 * Enable 11w if advertised by firmware and software crypto
309 * is not enabled (as the firmware will interpret some mgmt
310 * packets, so enabling it with software crypto isn't safe)
311 */
312 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_MFP &&
313 !iwlwifi_mod_params.sw_crypto)
314 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
315
316 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
317 IWL_UCODE_API(mvm->fw->ucode_ver) >= 9 &&
318 !iwlwifi_mod_params.uapsd_disable) {
319 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
320 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
321 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
322 }
323
324 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_UAPSD_SUPPORT &&
325 !iwlwifi_mod_params.uapsd_disable) {
326 hw->flags |= IEEE80211_HW_SUPPORTS_UAPSD;
327 hw->uapsd_queues = IWL_UAPSD_AC_INFO;
328 hw->uapsd_max_sp_len = IWL_UAPSD_MAX_SP;
329 }
330
331 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
332 hw->flags |= IEEE80211_SINGLE_HW_SCAN_ON_ALL_BANDS;
333
334 hw->sta_data_size = sizeof(struct iwl_mvm_sta);
335 hw->vif_data_size = sizeof(struct iwl_mvm_vif);
336 hw->chanctx_data_size = sizeof(u16);
337
338 hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
339 BIT(NL80211_IFTYPE_P2P_CLIENT) |
340 BIT(NL80211_IFTYPE_AP) |
341 BIT(NL80211_IFTYPE_P2P_GO) |
342 BIT(NL80211_IFTYPE_P2P_DEVICE) |
343 BIT(NL80211_IFTYPE_ADHOC);
344
345 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
346 hw->wiphy->regulatory_flags |= REGULATORY_CUSTOM_REG |
347 REGULATORY_DISABLE_BEACON_HINTS;
348
349 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_GO_UAPSD)
350 hw->wiphy->flags |= WIPHY_FLAG_AP_UAPSD;
351
352 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_CSA_FLOW)
353 hw->wiphy->flags |= WIPHY_FLAG_HAS_CHANNEL_SWITCH;
354
355 hw->wiphy->iface_combinations = iwl_mvm_iface_combinations;
356 hw->wiphy->n_iface_combinations =
357 ARRAY_SIZE(iwl_mvm_iface_combinations);
358
359 hw->wiphy->max_remain_on_channel_duration = 10000;
360 hw->max_listen_interval = IWL_CONN_MAX_LISTEN_INTERVAL;
361
362 /* Extract MAC address */
363 memcpy(mvm->addresses[0].addr, mvm->nvm_data->hw_addr, ETH_ALEN);
364 hw->wiphy->addresses = mvm->addresses;
365 hw->wiphy->n_addresses = 1;
366
367 /* Extract additional MAC addresses if available */
368 num_mac = (mvm->nvm_data->n_hw_addrs > 1) ?
369 min(IWL_MVM_MAX_ADDRESSES, mvm->nvm_data->n_hw_addrs) : 1;
370
371 for (i = 1; i < num_mac; i++) {
372 memcpy(mvm->addresses[i].addr, mvm->addresses[i-1].addr,
373 ETH_ALEN);
374 mvm->addresses[i].addr[5]++;
375 hw->wiphy->n_addresses++;
376 }
377
378 iwl_mvm_reset_phy_ctxts(mvm);
379
380 hw->wiphy->max_scan_ie_len = iwl_mvm_max_scan_ie_len(mvm);
381
382 hw->wiphy->max_scan_ssids = PROBE_OPTION_MAX;
383
384 if (mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels)
385 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
386 &mvm->nvm_data->bands[IEEE80211_BAND_2GHZ];
387 if (mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels)
388 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
389 &mvm->nvm_data->bands[IEEE80211_BAND_5GHZ];
390
391 hw->wiphy->hw_version = mvm->trans->hw_id;
392
393 if (iwlmvm_mod_params.power_scheme != IWL_POWER_SCHEME_CAM)
394 hw->wiphy->flags |= WIPHY_FLAG_PS_ON_BY_DEFAULT;
395 else
396 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
397
398 hw->wiphy->flags |= WIPHY_FLAG_SUPPORTS_SCHED_SCAN;
399 hw->wiphy->max_sched_scan_ssids = PROBE_OPTION_MAX;
400 hw->wiphy->max_match_sets = IWL_SCAN_MAX_PROFILES;
401 /* we create the 802.11 header and zero length SSID IE. */
402 hw->wiphy->max_sched_scan_ie_len = SCAN_OFFLOAD_PROBE_REQ_SIZE - 24 - 2;
403
404 hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
405 NL80211_FEATURE_LOW_PRIORITY_SCAN |
406 NL80211_FEATURE_P2P_GO_OPPPS;
407
408 mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
409
410 /* currently FW API supports only one optional cipher scheme */
411 if (mvm->fw->cs[0].cipher) {
412 mvm->hw->n_cipher_schemes = 1;
413 mvm->hw->cipher_schemes = &mvm->fw->cs[0];
414 }
415
416 #ifdef CONFIG_PM_SLEEP
417 if (iwl_mvm_is_d0i3_supported(mvm) &&
418 device_can_wakeup(mvm->trans->dev)) {
419 mvm->wowlan.flags = WIPHY_WOWLAN_ANY;
420 hw->wiphy->wowlan = &mvm->wowlan;
421 } else if (mvm->fw->img[IWL_UCODE_WOWLAN].sec[0].len &&
422 mvm->trans->ops->d3_suspend &&
423 mvm->trans->ops->d3_resume &&
424 device_can_wakeup(mvm->trans->dev)) {
425 mvm->wowlan.flags = WIPHY_WOWLAN_MAGIC_PKT |
426 WIPHY_WOWLAN_DISCONNECT |
427 WIPHY_WOWLAN_EAP_IDENTITY_REQ |
428 WIPHY_WOWLAN_RFKILL_RELEASE;
429 if (!iwlwifi_mod_params.sw_crypto)
430 mvm->wowlan.flags |= WIPHY_WOWLAN_SUPPORTS_GTK_REKEY |
431 WIPHY_WOWLAN_GTK_REKEY_FAILURE |
432 WIPHY_WOWLAN_4WAY_HANDSHAKE;
433
434 mvm->wowlan.n_patterns = IWL_WOWLAN_MAX_PATTERNS;
435 mvm->wowlan.pattern_min_len = IWL_WOWLAN_MIN_PATTERN_LEN;
436 mvm->wowlan.pattern_max_len = IWL_WOWLAN_MAX_PATTERN_LEN;
437 mvm->wowlan.tcp = &iwl_mvm_wowlan_tcp_support;
438 hw->wiphy->wowlan = &mvm->wowlan;
439 }
440 #endif
441
442 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
443 /* assign default bcast filtering configuration */
444 mvm->bcast_filters = iwl_mvm_default_bcast_filters;
445 #endif
446
447 ret = iwl_mvm_leds_init(mvm);
448 if (ret)
449 return ret;
450
451 ret = ieee80211_register_hw(mvm->hw);
452 if (ret)
453 iwl_mvm_leds_exit(mvm);
454
455 return ret;
456 }
457
458 static bool iwl_mvm_defer_tx(struct iwl_mvm *mvm,
459 struct ieee80211_sta *sta,
460 struct sk_buff *skb)
461 {
462 struct iwl_mvm_sta *mvmsta;
463 bool defer = false;
464
465 /*
466 * double check the IN_D0I3 flag both before and after
467 * taking the spinlock, in order to prevent taking
468 * the spinlock when not needed.
469 */
470 if (likely(!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status)))
471 return false;
472
473 spin_lock(&mvm->d0i3_tx_lock);
474 /*
475 * testing the flag again ensures the skb dequeue
476 * loop (on d0i3 exit) hasn't run yet.
477 */
478 if (!test_bit(IWL_MVM_STATUS_IN_D0I3, &mvm->status))
479 goto out;
480
481 mvmsta = iwl_mvm_sta_from_mac80211(sta);
482 if (mvmsta->sta_id == IWL_MVM_STATION_COUNT ||
483 mvmsta->sta_id != mvm->d0i3_ap_sta_id)
484 goto out;
485
486 __skb_queue_tail(&mvm->d0i3_tx, skb);
487 ieee80211_stop_queues(mvm->hw);
488
489 /* trigger wakeup */
490 iwl_mvm_ref(mvm, IWL_MVM_REF_TX);
491 iwl_mvm_unref(mvm, IWL_MVM_REF_TX);
492
493 defer = true;
494 out:
495 spin_unlock(&mvm->d0i3_tx_lock);
496 return defer;
497 }
498
499 static void iwl_mvm_mac_tx(struct ieee80211_hw *hw,
500 struct ieee80211_tx_control *control,
501 struct sk_buff *skb)
502 {
503 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
504 struct ieee80211_sta *sta = control->sta;
505 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
506 struct ieee80211_hdr *hdr = (void *)skb->data;
507
508 if (iwl_mvm_is_radio_killed(mvm)) {
509 IWL_DEBUG_DROP(mvm, "Dropping - RF/CT KILL\n");
510 goto drop;
511 }
512
513 if (IEEE80211_SKB_CB(skb)->hw_queue == IWL_MVM_OFFCHANNEL_QUEUE &&
514 !test_bit(IWL_MVM_STATUS_ROC_RUNNING, &mvm->status))
515 goto drop;
516
517 /* treat non-bufferable MMPDUs as broadcast if sta is sleeping */
518 if (unlikely(info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER &&
519 ieee80211_is_mgmt(hdr->frame_control) &&
520 !ieee80211_is_deauth(hdr->frame_control) &&
521 !ieee80211_is_disassoc(hdr->frame_control) &&
522 !ieee80211_is_action(hdr->frame_control)))
523 sta = NULL;
524
525 if (sta) {
526 if (iwl_mvm_defer_tx(mvm, sta, skb))
527 return;
528 if (iwl_mvm_tx_skb(mvm, skb, sta))
529 goto drop;
530 return;
531 }
532
533 if (iwl_mvm_tx_skb_non_sta(mvm, skb))
534 goto drop;
535 return;
536 drop:
537 ieee80211_free_txskb(hw, skb);
538 }
539
540 static inline bool iwl_enable_rx_ampdu(const struct iwl_cfg *cfg)
541 {
542 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_RXAGG)
543 return false;
544 return true;
545 }
546
547 static inline bool iwl_enable_tx_ampdu(const struct iwl_cfg *cfg)
548 {
549 if (iwlwifi_mod_params.disable_11n & IWL_DISABLE_HT_TXAGG)
550 return false;
551 if (iwlwifi_mod_params.disable_11n & IWL_ENABLE_HT_TXAGG)
552 return true;
553
554 /* enabled by default */
555 return true;
556 }
557
558 static int iwl_mvm_mac_ampdu_action(struct ieee80211_hw *hw,
559 struct ieee80211_vif *vif,
560 enum ieee80211_ampdu_mlme_action action,
561 struct ieee80211_sta *sta, u16 tid,
562 u16 *ssn, u8 buf_size)
563 {
564 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
565 int ret;
566 bool tx_agg_ref = false;
567
568 IWL_DEBUG_HT(mvm, "A-MPDU action on addr %pM tid %d: action %d\n",
569 sta->addr, tid, action);
570
571 if (!(mvm->nvm_data->sku_cap_11n_enable))
572 return -EACCES;
573
574 /* return from D0i3 before starting a new Tx aggregation */
575 switch (action) {
576 case IEEE80211_AMPDU_TX_START:
577 case IEEE80211_AMPDU_TX_STOP_CONT:
578 case IEEE80211_AMPDU_TX_STOP_FLUSH:
579 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
580 case IEEE80211_AMPDU_TX_OPERATIONAL:
581 /*
582 * for tx start, wait synchronously until D0i3 exit to
583 * get the correct sequence number for the tid.
584 * additionally, some other ampdu actions use direct
585 * target access, which is not handled automatically
586 * by the trans layer (unlike commands), so wait for
587 * d0i3 exit in these cases as well.
588 */
589 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_TX_AGG);
590 if (ret)
591 return ret;
592
593 tx_agg_ref = true;
594 break;
595 default:
596 break;
597 }
598
599 mutex_lock(&mvm->mutex);
600
601 switch (action) {
602 case IEEE80211_AMPDU_RX_START:
603 if (!iwl_enable_rx_ampdu(mvm->cfg)) {
604 ret = -EINVAL;
605 break;
606 }
607 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, *ssn, true);
608 break;
609 case IEEE80211_AMPDU_RX_STOP:
610 ret = iwl_mvm_sta_rx_agg(mvm, sta, tid, 0, false);
611 break;
612 case IEEE80211_AMPDU_TX_START:
613 if (!iwl_enable_tx_ampdu(mvm->cfg)) {
614 ret = -EINVAL;
615 break;
616 }
617 ret = iwl_mvm_sta_tx_agg_start(mvm, vif, sta, tid, ssn);
618 break;
619 case IEEE80211_AMPDU_TX_STOP_CONT:
620 ret = iwl_mvm_sta_tx_agg_stop(mvm, vif, sta, tid);
621 break;
622 case IEEE80211_AMPDU_TX_STOP_FLUSH:
623 case IEEE80211_AMPDU_TX_STOP_FLUSH_CONT:
624 ret = iwl_mvm_sta_tx_agg_flush(mvm, vif, sta, tid);
625 break;
626 case IEEE80211_AMPDU_TX_OPERATIONAL:
627 ret = iwl_mvm_sta_tx_agg_oper(mvm, vif, sta, tid, buf_size);
628 break;
629 default:
630 WARN_ON_ONCE(1);
631 ret = -EINVAL;
632 break;
633 }
634 mutex_unlock(&mvm->mutex);
635
636 /*
637 * If the tid is marked as started, we won't use it for offloaded
638 * traffic on the next D0i3 entry. It's safe to unref.
639 */
640 if (tx_agg_ref)
641 iwl_mvm_unref(mvm, IWL_MVM_REF_TX_AGG);
642
643 return ret;
644 }
645
646 static void iwl_mvm_cleanup_iterator(void *data, u8 *mac,
647 struct ieee80211_vif *vif)
648 {
649 struct iwl_mvm *mvm = data;
650 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
651
652 mvmvif->uploaded = false;
653 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
654
655 /* does this make sense at all? */
656 mvmvif->color++;
657
658 spin_lock_bh(&mvm->time_event_lock);
659 iwl_mvm_te_clear_data(mvm, &mvmvif->time_event_data);
660 spin_unlock_bh(&mvm->time_event_lock);
661
662 mvmvif->phy_ctxt = NULL;
663 }
664
665 #ifdef CONFIG_IWLWIFI_DEBUGFS
666 static void iwl_mvm_fw_error_dump(struct iwl_mvm *mvm)
667 {
668 struct iwl_fw_error_dump_file *dump_file;
669 struct iwl_fw_error_dump_data *dump_data;
670 struct iwl_fw_error_dump_info *dump_info;
671 const struct fw_img *img;
672 u32 sram_len, sram_ofs;
673 u32 file_len, rxf_len;
674 unsigned long flags;
675 u32 trans_len;
676 int reg_val;
677
678 lockdep_assert_held(&mvm->mutex);
679
680 if (mvm->fw_error_dump)
681 return;
682
683 img = &mvm->fw->img[mvm->cur_ucode];
684 sram_ofs = img->sec[IWL_UCODE_SECTION_DATA].offset;
685 sram_len = img->sec[IWL_UCODE_SECTION_DATA].len;
686
687 /* reading buffer size */
688 reg_val = iwl_trans_read_prph(mvm->trans, RXF_SIZE_ADDR);
689 rxf_len = (reg_val & RXF_SIZE_BYTE_CNT_MSK) >> RXF_SIZE_BYTE_CND_POS;
690
691 /* the register holds the value divided by 128 */
692 rxf_len = rxf_len << 7;
693
694 file_len = sizeof(*dump_file) +
695 sizeof(*dump_data) * 3 +
696 sram_len +
697 rxf_len +
698 sizeof(*dump_info);
699
700 trans_len = iwl_trans_dump_data(mvm->trans, NULL, 0);
701 if (trans_len)
702 file_len += trans_len;
703
704 dump_file = vzalloc(file_len);
705 if (!dump_file)
706 return;
707
708 mvm->fw_error_dump = dump_file;
709
710 dump_file->barker = cpu_to_le32(IWL_FW_ERROR_DUMP_BARKER);
711 dump_file->file_len = cpu_to_le32(file_len);
712 dump_data = (void *)dump_file->data;
713
714 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_DEV_FW_INFO);
715 dump_data->len = cpu_to_le32(sizeof(*dump_info));
716 dump_info = (void *) dump_data->data;
717 dump_info->device_family =
718 mvm->cfg->device_family == IWL_DEVICE_FAMILY_7000 ?
719 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_7) :
720 cpu_to_le32(IWL_FW_ERROR_DUMP_FAMILY_8);
721 memcpy(dump_info->fw_human_readable, mvm->fw->human_readable,
722 sizeof(dump_info->fw_human_readable));
723 strncpy(dump_info->dev_human_readable, mvm->cfg->name,
724 sizeof(dump_info->dev_human_readable));
725 strncpy(dump_info->bus_human_readable, mvm->dev->bus->name,
726 sizeof(dump_info->bus_human_readable));
727
728 dump_data = iwl_fw_error_next_data(dump_data);
729 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_RXF);
730 dump_data->len = cpu_to_le32(rxf_len);
731
732 if (iwl_trans_grab_nic_access(mvm->trans, false, &flags)) {
733 u32 *rxf = (void *)dump_data->data;
734 int i;
735
736 for (i = 0; i < (rxf_len / sizeof(u32)); i++) {
737 iwl_trans_write_prph(mvm->trans,
738 RXF_LD_FENCE_OFFSET_ADDR,
739 i * sizeof(u32));
740 rxf[i] = iwl_trans_read_prph(mvm->trans,
741 RXF_FIFO_RD_FENCE_ADDR);
742 }
743 iwl_trans_release_nic_access(mvm->trans, &flags);
744 }
745
746 dump_data = iwl_fw_error_next_data(dump_data);
747 dump_data->type = cpu_to_le32(IWL_FW_ERROR_DUMP_SRAM);
748 dump_data->len = cpu_to_le32(sram_len);
749 iwl_trans_read_mem_bytes(mvm->trans, sram_ofs, dump_data->data,
750 sram_len);
751
752 if (trans_len) {
753 void *buf = iwl_fw_error_next_data(dump_data);
754 u32 real_trans_len = iwl_trans_dump_data(mvm->trans, buf,
755 trans_len);
756 dump_data = (void *)((u8 *)buf + real_trans_len);
757 dump_file->file_len =
758 cpu_to_le32(file_len - trans_len + real_trans_len);
759 }
760 }
761 #endif
762
763 static void iwl_mvm_restart_cleanup(struct iwl_mvm *mvm)
764 {
765 #ifdef CONFIG_IWLWIFI_DEBUGFS
766 static char *env[] = { "DRIVER=iwlwifi", "EVENT=error_dump", NULL };
767
768 iwl_mvm_fw_error_dump(mvm);
769
770 /* notify the userspace about the error we had */
771 kobject_uevent_env(&mvm->hw->wiphy->dev.kobj, KOBJ_CHANGE, env);
772 #endif
773
774 iwl_trans_stop_device(mvm->trans);
775
776 mvm->scan_status = IWL_MVM_SCAN_NONE;
777
778 /* just in case one was running */
779 ieee80211_remain_on_channel_expired(mvm->hw);
780
781 ieee80211_iterate_active_interfaces_atomic(
782 mvm->hw, IEEE80211_IFACE_ITER_RESUME_ALL,
783 iwl_mvm_cleanup_iterator, mvm);
784
785 mvm->p2p_device_vif = NULL;
786 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
787
788 iwl_mvm_reset_phy_ctxts(mvm);
789 memset(mvm->fw_key_table, 0, sizeof(mvm->fw_key_table));
790 memset(mvm->sta_drained, 0, sizeof(mvm->sta_drained));
791
792 ieee80211_wake_queues(mvm->hw);
793
794 /* cleanup all stale references (scan, roc), but keep the
795 * ucode_down ref until reconfig is complete */
796 iwl_mvm_unref_all_except(mvm, IWL_MVM_REF_UCODE_DOWN);
797
798 mvm->vif_count = 0;
799 mvm->rx_ba_sessions = 0;
800 }
801
802 static int iwl_mvm_mac_start(struct ieee80211_hw *hw)
803 {
804 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
805 int ret;
806
807 mutex_lock(&mvm->mutex);
808
809 /* Clean up some internal and mac80211 state on restart */
810 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
811 iwl_mvm_restart_cleanup(mvm);
812
813 ret = iwl_mvm_up(mvm);
814
815 if (ret && test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) {
816 /* Something went wrong - we need to finish some cleanup
817 * that normally iwl_mvm_mac_restart_complete() below
818 * would do.
819 */
820 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
821 iwl_mvm_d0i3_enable_tx(mvm, NULL);
822 }
823
824 mutex_unlock(&mvm->mutex);
825
826 return ret;
827 }
828
829 static void iwl_mvm_mac_restart_complete(struct ieee80211_hw *hw)
830 {
831 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
832 int ret;
833
834 mutex_lock(&mvm->mutex);
835
836 clear_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status);
837 iwl_mvm_d0i3_enable_tx(mvm, NULL);
838 ret = iwl_mvm_update_quotas(mvm, NULL);
839 if (ret)
840 IWL_ERR(mvm, "Failed to update quotas after restart (%d)\n",
841 ret);
842
843 /* allow transport/FW low power modes */
844 iwl_mvm_unref(mvm, IWL_MVM_REF_UCODE_DOWN);
845
846 mutex_unlock(&mvm->mutex);
847 }
848
849 static void iwl_mvm_mac_stop(struct ieee80211_hw *hw)
850 {
851 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
852
853 flush_work(&mvm->d0i3_exit_work);
854 flush_work(&mvm->async_handlers_wk);
855
856 mutex_lock(&mvm->mutex);
857
858 /* disallow low power states when the FW is down */
859 iwl_mvm_ref(mvm, IWL_MVM_REF_UCODE_DOWN);
860
861 /* async_handlers_wk is now blocked */
862
863 /*
864 * The work item could be running or queued if the
865 * ROC time event stops just as we get here.
866 */
867 cancel_work_sync(&mvm->roc_done_wk);
868
869 iwl_trans_stop_device(mvm->trans);
870
871 iwl_mvm_async_handlers_purge(mvm);
872 /* async_handlers_list is empty and will stay empty: HW is stopped */
873
874 /* the fw is stopped, the aux sta is dead: clean up driver state */
875 iwl_mvm_dealloc_int_sta(mvm, &mvm->aux_sta);
876
877 mutex_unlock(&mvm->mutex);
878
879 /*
880 * The worker might have been waiting for the mutex, let it run and
881 * discover that its list is now empty.
882 */
883 cancel_work_sync(&mvm->async_handlers_wk);
884 }
885
886 static struct iwl_mvm_phy_ctxt *iwl_mvm_get_free_phy_ctxt(struct iwl_mvm *mvm)
887 {
888 u16 i;
889
890 lockdep_assert_held(&mvm->mutex);
891
892 for (i = 0; i < NUM_PHY_CTX; i++)
893 if (!mvm->phy_ctxts[i].ref)
894 return &mvm->phy_ctxts[i];
895
896 IWL_ERR(mvm, "No available PHY context\n");
897 return NULL;
898 }
899
900 static int iwl_mvm_set_tx_power(struct iwl_mvm *mvm, struct ieee80211_vif *vif,
901 s8 tx_power)
902 {
903 /* FW is in charge of regulatory enforcement */
904 struct iwl_reduce_tx_power_cmd reduce_txpwr_cmd = {
905 .mac_context_id = iwl_mvm_vif_from_mac80211(vif)->id,
906 .pwr_restriction = cpu_to_le16(tx_power),
907 };
908
909 return iwl_mvm_send_cmd_pdu(mvm, REDUCE_TX_POWER_CMD, 0,
910 sizeof(reduce_txpwr_cmd),
911 &reduce_txpwr_cmd);
912 }
913
914 static int iwl_mvm_mac_add_interface(struct ieee80211_hw *hw,
915 struct ieee80211_vif *vif)
916 {
917 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
918 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
919 int ret;
920
921 /*
922 * make sure D0i3 exit is completed, otherwise a target access
923 * during tx queue configuration could be done when still in
924 * D0i3 state.
925 */
926 ret = iwl_mvm_ref_sync(mvm, IWL_MVM_REF_ADD_IF);
927 if (ret)
928 return ret;
929
930 /*
931 * Not much to do here. The stack will not allow interface
932 * types or combinations that we didn't advertise, so we
933 * don't really have to check the types.
934 */
935
936 mutex_lock(&mvm->mutex);
937
938 /* Allocate resources for the MAC context, and add it to the fw */
939 ret = iwl_mvm_mac_ctxt_init(mvm, vif);
940 if (ret)
941 goto out_unlock;
942
943 /* Counting number of interfaces is needed for legacy PM */
944 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
945 mvm->vif_count++;
946
947 /*
948 * The AP binding flow can be done only after the beacon
949 * template is configured (which happens only in the mac80211
950 * start_ap() flow), and adding the broadcast station can happen
951 * only after the binding.
952 * In addition, since modifying the MAC before adding a bcast
953 * station is not allowed by the FW, delay the adding of MAC context to
954 * the point where we can also add the bcast station.
955 * In short: there's not much we can do at this point, other than
956 * allocating resources :)
957 */
958 if (vif->type == NL80211_IFTYPE_AP ||
959 vif->type == NL80211_IFTYPE_ADHOC) {
960 u32 qmask = iwl_mvm_mac_get_queues_mask(mvm, vif);
961 ret = iwl_mvm_allocate_int_sta(mvm, &mvmvif->bcast_sta,
962 qmask,
963 ieee80211_vif_type_p2p(vif));
964 if (ret) {
965 IWL_ERR(mvm, "Failed to allocate bcast sta\n");
966 goto out_release;
967 }
968
969 iwl_mvm_vif_dbgfs_register(mvm, vif);
970 goto out_unlock;
971 }
972
973 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
974 if (ret)
975 goto out_release;
976
977 ret = iwl_mvm_power_update_mac(mvm);
978 if (ret)
979 goto out_release;
980
981 /* beacon filtering */
982 ret = iwl_mvm_disable_beacon_filter(mvm, vif, 0);
983 if (ret)
984 goto out_remove_mac;
985
986 if (!mvm->bf_allowed_vif &&
987 vif->type == NL80211_IFTYPE_STATION && !vif->p2p) {
988 mvm->bf_allowed_vif = mvmvif;
989 vif->driver_flags |= IEEE80211_VIF_BEACON_FILTER |
990 IEEE80211_VIF_SUPPORTS_CQM_RSSI;
991 }
992
993 /*
994 * P2P_DEVICE interface does not have a channel context assigned to it,
995 * so a dedicated PHY context is allocated to it and the corresponding
996 * MAC context is bound to it at this stage.
997 */
998 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
999
1000 mvmvif->phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
1001 if (!mvmvif->phy_ctxt) {
1002 ret = -ENOSPC;
1003 goto out_free_bf;
1004 }
1005
1006 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
1007 ret = iwl_mvm_binding_add_vif(mvm, vif);
1008 if (ret)
1009 goto out_unref_phy;
1010
1011 ret = iwl_mvm_add_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1012 if (ret)
1013 goto out_unbind;
1014
1015 /* Save a pointer to p2p device vif, so it can later be used to
1016 * update the p2p device MAC when a GO is started/stopped */
1017 mvm->p2p_device_vif = vif;
1018 }
1019
1020 iwl_mvm_vif_dbgfs_register(mvm, vif);
1021 goto out_unlock;
1022
1023 out_unbind:
1024 iwl_mvm_binding_remove_vif(mvm, vif);
1025 out_unref_phy:
1026 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1027 out_free_bf:
1028 if (mvm->bf_allowed_vif == mvmvif) {
1029 mvm->bf_allowed_vif = NULL;
1030 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1031 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1032 }
1033 out_remove_mac:
1034 mvmvif->phy_ctxt = NULL;
1035 iwl_mvm_mac_ctxt_remove(mvm, vif);
1036 out_release:
1037 if (vif->type != NL80211_IFTYPE_P2P_DEVICE)
1038 mvm->vif_count--;
1039
1040 iwl_mvm_mac_ctxt_release(mvm, vif);
1041 out_unlock:
1042 mutex_unlock(&mvm->mutex);
1043
1044 iwl_mvm_unref(mvm, IWL_MVM_REF_ADD_IF);
1045
1046 return ret;
1047 }
1048
1049 static void iwl_mvm_prepare_mac_removal(struct iwl_mvm *mvm,
1050 struct ieee80211_vif *vif)
1051 {
1052 u32 tfd_msk = 0, ac;
1053
1054 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
1055 if (vif->hw_queue[ac] != IEEE80211_INVAL_HW_QUEUE)
1056 tfd_msk |= BIT(vif->hw_queue[ac]);
1057
1058 if (vif->cab_queue != IEEE80211_INVAL_HW_QUEUE)
1059 tfd_msk |= BIT(vif->cab_queue);
1060
1061 if (tfd_msk) {
1062 mutex_lock(&mvm->mutex);
1063 iwl_mvm_flush_tx_path(mvm, tfd_msk, true);
1064 mutex_unlock(&mvm->mutex);
1065 }
1066
1067 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1068 /*
1069 * Flush the ROC worker which will flush the OFFCHANNEL queue.
1070 * We assume here that all the packets sent to the OFFCHANNEL
1071 * queue are sent in ROC session.
1072 */
1073 flush_work(&mvm->roc_done_wk);
1074 } else {
1075 /*
1076 * By now, all the AC queues are empty. The AGG queues are
1077 * empty too. We already got all the Tx responses for all the
1078 * packets in the queues. The drain work can have been
1079 * triggered. Flush it.
1080 */
1081 flush_work(&mvm->sta_drained_wk);
1082 }
1083 }
1084
1085 static void iwl_mvm_mac_remove_interface(struct ieee80211_hw *hw,
1086 struct ieee80211_vif *vif)
1087 {
1088 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1089 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1090
1091 iwl_mvm_prepare_mac_removal(mvm, vif);
1092
1093 mutex_lock(&mvm->mutex);
1094
1095 if (mvm->bf_allowed_vif == mvmvif) {
1096 mvm->bf_allowed_vif = NULL;
1097 vif->driver_flags &= ~(IEEE80211_VIF_BEACON_FILTER |
1098 IEEE80211_VIF_SUPPORTS_CQM_RSSI);
1099 }
1100
1101 iwl_mvm_vif_dbgfs_clean(mvm, vif);
1102
1103 /*
1104 * For AP/GO interface, the tear down of the resources allocated to the
1105 * interface is be handled as part of the stop_ap flow.
1106 */
1107 if (vif->type == NL80211_IFTYPE_AP ||
1108 vif->type == NL80211_IFTYPE_ADHOC) {
1109 #ifdef CONFIG_NL80211_TESTMODE
1110 if (vif == mvm->noa_vif) {
1111 mvm->noa_vif = NULL;
1112 mvm->noa_duration = 0;
1113 }
1114 #endif
1115 iwl_mvm_dealloc_int_sta(mvm, &mvmvif->bcast_sta);
1116 goto out_release;
1117 }
1118
1119 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1120 mvm->p2p_device_vif = NULL;
1121 iwl_mvm_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1122 iwl_mvm_binding_remove_vif(mvm, vif);
1123 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
1124 mvmvif->phy_ctxt = NULL;
1125 }
1126
1127 if (mvm->vif_count && vif->type != NL80211_IFTYPE_P2P_DEVICE)
1128 mvm->vif_count--;
1129
1130 iwl_mvm_power_update_mac(mvm);
1131 iwl_mvm_mac_ctxt_remove(mvm, vif);
1132
1133 out_release:
1134 iwl_mvm_mac_ctxt_release(mvm, vif);
1135 mutex_unlock(&mvm->mutex);
1136 }
1137
1138 static int iwl_mvm_mac_config(struct ieee80211_hw *hw, u32 changed)
1139 {
1140 return 0;
1141 }
1142
1143 struct iwl_mvm_mc_iter_data {
1144 struct iwl_mvm *mvm;
1145 int port_id;
1146 };
1147
1148 static void iwl_mvm_mc_iface_iterator(void *_data, u8 *mac,
1149 struct ieee80211_vif *vif)
1150 {
1151 struct iwl_mvm_mc_iter_data *data = _data;
1152 struct iwl_mvm *mvm = data->mvm;
1153 struct iwl_mcast_filter_cmd *cmd = mvm->mcast_filter_cmd;
1154 int ret, len;
1155
1156 /* if we don't have free ports, mcast frames will be dropped */
1157 if (WARN_ON_ONCE(data->port_id >= MAX_PORT_ID_NUM))
1158 return;
1159
1160 if (vif->type != NL80211_IFTYPE_STATION ||
1161 !vif->bss_conf.assoc)
1162 return;
1163
1164 cmd->port_id = data->port_id++;
1165 memcpy(cmd->bssid, vif->bss_conf.bssid, ETH_ALEN);
1166 len = roundup(sizeof(*cmd) + cmd->count * ETH_ALEN, 4);
1167
1168 ret = iwl_mvm_send_cmd_pdu(mvm, MCAST_FILTER_CMD, CMD_ASYNC, len, cmd);
1169 if (ret)
1170 IWL_ERR(mvm, "mcast filter cmd error. ret=%d\n", ret);
1171 }
1172
1173 static void iwl_mvm_recalc_multicast(struct iwl_mvm *mvm)
1174 {
1175 struct iwl_mvm_mc_iter_data iter_data = {
1176 .mvm = mvm,
1177 };
1178
1179 lockdep_assert_held(&mvm->mutex);
1180
1181 if (WARN_ON_ONCE(!mvm->mcast_filter_cmd))
1182 return;
1183
1184 ieee80211_iterate_active_interfaces_atomic(
1185 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1186 iwl_mvm_mc_iface_iterator, &iter_data);
1187 }
1188
1189 static u64 iwl_mvm_prepare_multicast(struct ieee80211_hw *hw,
1190 struct netdev_hw_addr_list *mc_list)
1191 {
1192 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1193 struct iwl_mcast_filter_cmd *cmd;
1194 struct netdev_hw_addr *addr;
1195 int addr_count = netdev_hw_addr_list_count(mc_list);
1196 bool pass_all = false;
1197 int len;
1198
1199 if (addr_count > MAX_MCAST_FILTERING_ADDRESSES) {
1200 pass_all = true;
1201 addr_count = 0;
1202 }
1203
1204 len = roundup(sizeof(*cmd) + addr_count * ETH_ALEN, 4);
1205 cmd = kzalloc(len, GFP_ATOMIC);
1206 if (!cmd)
1207 return 0;
1208
1209 if (pass_all) {
1210 cmd->pass_all = 1;
1211 return (u64)(unsigned long)cmd;
1212 }
1213
1214 netdev_hw_addr_list_for_each(addr, mc_list) {
1215 IWL_DEBUG_MAC80211(mvm, "mcast addr (%d): %pM\n",
1216 cmd->count, addr->addr);
1217 memcpy(&cmd->addr_list[cmd->count * ETH_ALEN],
1218 addr->addr, ETH_ALEN);
1219 cmd->count++;
1220 }
1221
1222 return (u64)(unsigned long)cmd;
1223 }
1224
1225 static void iwl_mvm_configure_filter(struct ieee80211_hw *hw,
1226 unsigned int changed_flags,
1227 unsigned int *total_flags,
1228 u64 multicast)
1229 {
1230 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1231 struct iwl_mcast_filter_cmd *cmd = (void *)(unsigned long)multicast;
1232
1233 mutex_lock(&mvm->mutex);
1234
1235 /* replace previous configuration */
1236 kfree(mvm->mcast_filter_cmd);
1237 mvm->mcast_filter_cmd = cmd;
1238
1239 if (!cmd)
1240 goto out;
1241
1242 iwl_mvm_recalc_multicast(mvm);
1243 out:
1244 mutex_unlock(&mvm->mutex);
1245 *total_flags = 0;
1246 }
1247
1248 #ifdef CONFIG_IWLWIFI_BCAST_FILTERING
1249 struct iwl_bcast_iter_data {
1250 struct iwl_mvm *mvm;
1251 struct iwl_bcast_filter_cmd *cmd;
1252 u8 current_filter;
1253 };
1254
1255 static void
1256 iwl_mvm_set_bcast_filter(struct ieee80211_vif *vif,
1257 const struct iwl_fw_bcast_filter *in_filter,
1258 struct iwl_fw_bcast_filter *out_filter)
1259 {
1260 struct iwl_fw_bcast_filter_attr *attr;
1261 int i;
1262
1263 memcpy(out_filter, in_filter, sizeof(*out_filter));
1264
1265 for (i = 0; i < ARRAY_SIZE(out_filter->attrs); i++) {
1266 attr = &out_filter->attrs[i];
1267
1268 if (!attr->mask)
1269 break;
1270
1271 switch (attr->reserved1) {
1272 case cpu_to_le16(BC_FILTER_MAGIC_IP):
1273 if (vif->bss_conf.arp_addr_cnt != 1) {
1274 attr->mask = 0;
1275 continue;
1276 }
1277
1278 attr->val = vif->bss_conf.arp_addr_list[0];
1279 break;
1280 case cpu_to_le16(BC_FILTER_MAGIC_MAC):
1281 attr->val = *(__be32 *)&vif->addr[2];
1282 break;
1283 default:
1284 break;
1285 }
1286 attr->reserved1 = 0;
1287 out_filter->num_attrs++;
1288 }
1289 }
1290
1291 static void iwl_mvm_bcast_filter_iterator(void *_data, u8 *mac,
1292 struct ieee80211_vif *vif)
1293 {
1294 struct iwl_bcast_iter_data *data = _data;
1295 struct iwl_mvm *mvm = data->mvm;
1296 struct iwl_bcast_filter_cmd *cmd = data->cmd;
1297 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1298 struct iwl_fw_bcast_mac *bcast_mac;
1299 int i;
1300
1301 if (WARN_ON(mvmvif->id >= ARRAY_SIZE(cmd->macs)))
1302 return;
1303
1304 bcast_mac = &cmd->macs[mvmvif->id];
1305
1306 /*
1307 * enable filtering only for associated stations, but not for P2P
1308 * Clients
1309 */
1310 if (vif->type != NL80211_IFTYPE_STATION || vif->p2p ||
1311 !vif->bss_conf.assoc)
1312 return;
1313
1314 bcast_mac->default_discard = 1;
1315
1316 /* copy all configured filters */
1317 for (i = 0; mvm->bcast_filters[i].attrs[0].mask; i++) {
1318 /*
1319 * Make sure we don't exceed our filters limit.
1320 * if there is still a valid filter to be configured,
1321 * be on the safe side and just allow bcast for this mac.
1322 */
1323 if (WARN_ON_ONCE(data->current_filter >=
1324 ARRAY_SIZE(cmd->filters))) {
1325 bcast_mac->default_discard = 0;
1326 bcast_mac->attached_filters = 0;
1327 break;
1328 }
1329
1330 iwl_mvm_set_bcast_filter(vif,
1331 &mvm->bcast_filters[i],
1332 &cmd->filters[data->current_filter]);
1333
1334 /* skip current filter if it contains no attributes */
1335 if (!cmd->filters[data->current_filter].num_attrs)
1336 continue;
1337
1338 /* attach the filter to current mac */
1339 bcast_mac->attached_filters |=
1340 cpu_to_le16(BIT(data->current_filter));
1341
1342 data->current_filter++;
1343 }
1344 }
1345
1346 bool iwl_mvm_bcast_filter_build_cmd(struct iwl_mvm *mvm,
1347 struct iwl_bcast_filter_cmd *cmd)
1348 {
1349 struct iwl_bcast_iter_data iter_data = {
1350 .mvm = mvm,
1351 .cmd = cmd,
1352 };
1353
1354 memset(cmd, 0, sizeof(*cmd));
1355 cmd->max_bcast_filters = ARRAY_SIZE(cmd->filters);
1356 cmd->max_macs = ARRAY_SIZE(cmd->macs);
1357
1358 #ifdef CONFIG_IWLWIFI_DEBUGFS
1359 /* use debugfs filters/macs if override is configured */
1360 if (mvm->dbgfs_bcast_filtering.override) {
1361 memcpy(cmd->filters, &mvm->dbgfs_bcast_filtering.cmd.filters,
1362 sizeof(cmd->filters));
1363 memcpy(cmd->macs, &mvm->dbgfs_bcast_filtering.cmd.macs,
1364 sizeof(cmd->macs));
1365 return true;
1366 }
1367 #endif
1368
1369 /* if no filters are configured, do nothing */
1370 if (!mvm->bcast_filters)
1371 return false;
1372
1373 /* configure and attach these filters for each associated sta vif */
1374 ieee80211_iterate_active_interfaces(
1375 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
1376 iwl_mvm_bcast_filter_iterator, &iter_data);
1377
1378 return true;
1379 }
1380 static int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1381 struct ieee80211_vif *vif)
1382 {
1383 struct iwl_bcast_filter_cmd cmd;
1384
1385 if (!(mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_BCAST_FILTERING))
1386 return 0;
1387
1388 if (!iwl_mvm_bcast_filter_build_cmd(mvm, &cmd))
1389 return 0;
1390
1391 return iwl_mvm_send_cmd_pdu(mvm, BCAST_FILTER_CMD, 0,
1392 sizeof(cmd), &cmd);
1393 }
1394 #else
1395 static inline int iwl_mvm_configure_bcast_filter(struct iwl_mvm *mvm,
1396 struct ieee80211_vif *vif)
1397 {
1398 return 0;
1399 }
1400 #endif
1401
1402 static void iwl_mvm_bss_info_changed_station(struct iwl_mvm *mvm,
1403 struct ieee80211_vif *vif,
1404 struct ieee80211_bss_conf *bss_conf,
1405 u32 changes)
1406 {
1407 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1408 int ret;
1409
1410 /*
1411 * Re-calculate the tsf id, as the master-slave relations depend on the
1412 * beacon interval, which was not known when the station interface was
1413 * added.
1414 */
1415 if (changes & BSS_CHANGED_ASSOC && bss_conf->assoc)
1416 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1417
1418 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1419 if (ret)
1420 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1421
1422 if (changes & BSS_CHANGED_ASSOC) {
1423 if (bss_conf->assoc) {
1424 /* add quota for this interface */
1425 ret = iwl_mvm_update_quotas(mvm, NULL);
1426 if (ret) {
1427 IWL_ERR(mvm, "failed to update quotas\n");
1428 return;
1429 }
1430
1431 if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART,
1432 &mvm->status)) {
1433 /*
1434 * If we're restarting then the firmware will
1435 * obviously have lost synchronisation with
1436 * the AP. It will attempt to synchronise by
1437 * itself, but we can make it more reliable by
1438 * scheduling a session protection time event.
1439 *
1440 * The firmware needs to receive a beacon to
1441 * catch up with synchronisation, use 110% of
1442 * the beacon interval.
1443 *
1444 * Set a large maximum delay to allow for more
1445 * than a single interface.
1446 */
1447 u32 dur = (11 * vif->bss_conf.beacon_int) / 10;
1448 iwl_mvm_protect_session(mvm, vif, dur, dur,
1449 5 * dur);
1450 }
1451
1452 iwl_mvm_sf_update(mvm, vif, false);
1453 iwl_mvm_power_vif_assoc(mvm, vif);
1454 if (vif->p2p)
1455 iwl_mvm_ref(mvm, IWL_MVM_REF_P2P_CLIENT);
1456 } else if (mvmvif->ap_sta_id != IWL_MVM_STATION_COUNT) {
1457 /*
1458 * If update fails - SF might be running in associated
1459 * mode while disassociated - which is forbidden.
1460 */
1461 WARN_ONCE(iwl_mvm_sf_update(mvm, vif, false),
1462 "Failed to update SF upon disassociation\n");
1463
1464 /* remove AP station now that the MAC is unassoc */
1465 ret = iwl_mvm_rm_sta_id(mvm, vif, mvmvif->ap_sta_id);
1466 if (ret)
1467 IWL_ERR(mvm, "failed to remove AP station\n");
1468
1469 if (mvm->d0i3_ap_sta_id == mvmvif->ap_sta_id)
1470 mvm->d0i3_ap_sta_id = IWL_MVM_STATION_COUNT;
1471 mvmvif->ap_sta_id = IWL_MVM_STATION_COUNT;
1472 /* remove quota for this interface */
1473 ret = iwl_mvm_update_quotas(mvm, NULL);
1474 if (ret)
1475 IWL_ERR(mvm, "failed to update quotas\n");
1476
1477 if (vif->p2p)
1478 iwl_mvm_unref(mvm, IWL_MVM_REF_P2P_CLIENT);
1479 }
1480
1481 iwl_mvm_recalc_multicast(mvm);
1482 iwl_mvm_configure_bcast_filter(mvm, vif);
1483
1484 /* reset rssi values */
1485 mvmvif->bf_data.ave_beacon_signal = 0;
1486
1487 iwl_mvm_bt_coex_vif_change(mvm);
1488 iwl_mvm_update_smps(mvm, vif, IWL_MVM_SMPS_REQ_TT,
1489 IEEE80211_SMPS_AUTOMATIC);
1490 } else if (changes & BSS_CHANGED_BEACON_INFO) {
1491 /*
1492 * We received a beacon _after_ association so
1493 * remove the session protection.
1494 */
1495 iwl_mvm_remove_time_event(mvm, mvmvif,
1496 &mvmvif->time_event_data);
1497 iwl_mvm_sf_update(mvm, vif, false);
1498 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1499 } else if (changes & (BSS_CHANGED_PS | BSS_CHANGED_P2P_PS |
1500 BSS_CHANGED_QOS)) {
1501 ret = iwl_mvm_power_update_mac(mvm);
1502 if (ret)
1503 IWL_ERR(mvm, "failed to update power mode\n");
1504 }
1505 if (changes & BSS_CHANGED_TXPOWER) {
1506 IWL_DEBUG_CALIB(mvm, "Changing TX Power to %d\n",
1507 bss_conf->txpower);
1508 iwl_mvm_set_tx_power(mvm, vif, bss_conf->txpower);
1509 }
1510
1511 if (changes & BSS_CHANGED_CQM) {
1512 IWL_DEBUG_MAC80211(mvm, "cqm info_changed\n");
1513 /* reset cqm events tracking */
1514 mvmvif->bf_data.last_cqm_event = 0;
1515 if (mvmvif->bf_data.bf_enabled) {
1516 ret = iwl_mvm_enable_beacon_filter(mvm, vif, 0);
1517 if (ret)
1518 IWL_ERR(mvm,
1519 "failed to update CQM thresholds\n");
1520 }
1521 }
1522
1523 if (changes & BSS_CHANGED_ARP_FILTER) {
1524 IWL_DEBUG_MAC80211(mvm, "arp filter changed\n");
1525 iwl_mvm_configure_bcast_filter(mvm, vif);
1526 }
1527 }
1528
1529 static int iwl_mvm_start_ap_ibss(struct ieee80211_hw *hw,
1530 struct ieee80211_vif *vif)
1531 {
1532 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1533 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1534 int ret;
1535
1536 mutex_lock(&mvm->mutex);
1537
1538 /* Send the beacon template */
1539 ret = iwl_mvm_mac_ctxt_beacon_changed(mvm, vif);
1540 if (ret)
1541 goto out_unlock;
1542
1543 /*
1544 * Re-calculate the tsf id, as the master-slave relations depend on the
1545 * beacon interval, which was not known when the AP interface was added.
1546 */
1547 if (vif->type == NL80211_IFTYPE_AP)
1548 iwl_mvm_mac_ctxt_recalc_tsf_id(mvm, vif);
1549
1550 /* Add the mac context */
1551 ret = iwl_mvm_mac_ctxt_add(mvm, vif);
1552 if (ret)
1553 goto out_unlock;
1554
1555 /* Perform the binding */
1556 ret = iwl_mvm_binding_add_vif(mvm, vif);
1557 if (ret)
1558 goto out_remove;
1559
1560 /* Send the bcast station. At this stage the TBTT and DTIM time events
1561 * are added and applied to the scheduler */
1562 ret = iwl_mvm_send_bcast_sta(mvm, vif, &mvmvif->bcast_sta);
1563 if (ret)
1564 goto out_unbind;
1565
1566 /* must be set before quota calculations */
1567 mvmvif->ap_ibss_active = true;
1568
1569 /* power updated needs to be done before quotas */
1570 iwl_mvm_power_update_mac(mvm);
1571
1572 ret = iwl_mvm_update_quotas(mvm, NULL);
1573 if (ret)
1574 goto out_quota_failed;
1575
1576 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1577 if (vif->p2p && mvm->p2p_device_vif)
1578 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1579
1580 iwl_mvm_ref(mvm, IWL_MVM_REF_AP_IBSS);
1581
1582 iwl_mvm_bt_coex_vif_change(mvm);
1583
1584 mutex_unlock(&mvm->mutex);
1585 return 0;
1586
1587 out_quota_failed:
1588 iwl_mvm_power_update_mac(mvm);
1589 mvmvif->ap_ibss_active = false;
1590 iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1591 out_unbind:
1592 iwl_mvm_binding_remove_vif(mvm, vif);
1593 out_remove:
1594 iwl_mvm_mac_ctxt_remove(mvm, vif);
1595 out_unlock:
1596 mutex_unlock(&mvm->mutex);
1597 return ret;
1598 }
1599
1600 static void iwl_mvm_stop_ap_ibss(struct ieee80211_hw *hw,
1601 struct ieee80211_vif *vif)
1602 {
1603 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1604 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1605
1606 iwl_mvm_prepare_mac_removal(mvm, vif);
1607
1608 mutex_lock(&mvm->mutex);
1609
1610 /* Handle AP stop while in CSA */
1611 if (rcu_access_pointer(mvm->csa_vif) == vif) {
1612 iwl_mvm_remove_time_event(mvm, mvmvif,
1613 &mvmvif->time_event_data);
1614 RCU_INIT_POINTER(mvm->csa_vif, NULL);
1615 }
1616
1617 mvmvif->ap_ibss_active = false;
1618 mvm->ap_last_beacon_gp2 = 0;
1619
1620 iwl_mvm_bt_coex_vif_change(mvm);
1621
1622 iwl_mvm_unref(mvm, IWL_MVM_REF_AP_IBSS);
1623
1624 /* Need to update the P2P Device MAC (only GO, IBSS is single vif) */
1625 if (vif->p2p && mvm->p2p_device_vif)
1626 iwl_mvm_mac_ctxt_changed(mvm, mvm->p2p_device_vif, false);
1627
1628 iwl_mvm_update_quotas(mvm, NULL);
1629 iwl_mvm_send_rm_bcast_sta(mvm, &mvmvif->bcast_sta);
1630 iwl_mvm_binding_remove_vif(mvm, vif);
1631
1632 iwl_mvm_power_update_mac(mvm);
1633
1634 iwl_mvm_mac_ctxt_remove(mvm, vif);
1635
1636 mutex_unlock(&mvm->mutex);
1637 }
1638
1639 static void
1640 iwl_mvm_bss_info_changed_ap_ibss(struct iwl_mvm *mvm,
1641 struct ieee80211_vif *vif,
1642 struct ieee80211_bss_conf *bss_conf,
1643 u32 changes)
1644 {
1645 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1646
1647 /* Changes will be applied when the AP/IBSS is started */
1648 if (!mvmvif->ap_ibss_active)
1649 return;
1650
1651 if (changes & (BSS_CHANGED_ERP_CTS_PROT | BSS_CHANGED_HT |
1652 BSS_CHANGED_BANDWIDTH) &&
1653 iwl_mvm_mac_ctxt_changed(mvm, vif, false))
1654 IWL_ERR(mvm, "failed to update MAC %pM\n", vif->addr);
1655
1656 /* Need to send a new beacon template to the FW */
1657 if (changes & BSS_CHANGED_BEACON &&
1658 iwl_mvm_mac_ctxt_beacon_changed(mvm, vif))
1659 IWL_WARN(mvm, "Failed updating beacon data\n");
1660 }
1661
1662 static void iwl_mvm_bss_info_changed(struct ieee80211_hw *hw,
1663 struct ieee80211_vif *vif,
1664 struct ieee80211_bss_conf *bss_conf,
1665 u32 changes)
1666 {
1667 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1668
1669 mutex_lock(&mvm->mutex);
1670
1671 if (changes & BSS_CHANGED_IDLE && !bss_conf->idle)
1672 iwl_mvm_scan_offload_stop(mvm, true);
1673
1674 switch (vif->type) {
1675 case NL80211_IFTYPE_STATION:
1676 iwl_mvm_bss_info_changed_station(mvm, vif, bss_conf, changes);
1677 break;
1678 case NL80211_IFTYPE_AP:
1679 case NL80211_IFTYPE_ADHOC:
1680 iwl_mvm_bss_info_changed_ap_ibss(mvm, vif, bss_conf, changes);
1681 break;
1682 default:
1683 /* shouldn't happen */
1684 WARN_ON_ONCE(1);
1685 }
1686
1687 mutex_unlock(&mvm->mutex);
1688 }
1689
1690 static int iwl_mvm_mac_hw_scan(struct ieee80211_hw *hw,
1691 struct ieee80211_vif *vif,
1692 struct ieee80211_scan_request *hw_req)
1693 {
1694 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1695 struct cfg80211_scan_request *req = &hw_req->req;
1696 int ret;
1697
1698 if (req->n_channels == 0 ||
1699 req->n_channels > mvm->fw->ucode_capa.n_scan_channels)
1700 return -EINVAL;
1701
1702 mutex_lock(&mvm->mutex);
1703
1704 switch (mvm->scan_status) {
1705 case IWL_MVM_SCAN_SCHED:
1706 ret = iwl_mvm_scan_offload_stop(mvm, true);
1707 if (ret) {
1708 ret = -EBUSY;
1709 goto out;
1710 }
1711 break;
1712 case IWL_MVM_SCAN_NONE:
1713 break;
1714 default:
1715 ret = -EBUSY;
1716 goto out;
1717 }
1718
1719 iwl_mvm_ref(mvm, IWL_MVM_REF_SCAN);
1720
1721 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
1722 ret = iwl_mvm_unified_scan_lmac(mvm, vif, hw_req);
1723 else
1724 ret = iwl_mvm_scan_request(mvm, vif, req);
1725
1726 if (ret)
1727 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
1728 out:
1729 mutex_unlock(&mvm->mutex);
1730 /* make sure to flush the Rx handler before the next scan arrives */
1731 iwl_mvm_wait_for_async_handlers(mvm);
1732 return ret;
1733 }
1734
1735 static void iwl_mvm_mac_cancel_hw_scan(struct ieee80211_hw *hw,
1736 struct ieee80211_vif *vif)
1737 {
1738 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1739
1740 mutex_lock(&mvm->mutex);
1741
1742 iwl_mvm_cancel_scan(mvm);
1743
1744 mutex_unlock(&mvm->mutex);
1745 }
1746
1747 static void
1748 iwl_mvm_mac_allow_buffered_frames(struct ieee80211_hw *hw,
1749 struct ieee80211_sta *sta, u16 tids,
1750 int num_frames,
1751 enum ieee80211_frame_release_type reason,
1752 bool more_data)
1753 {
1754 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1755
1756 /* Called when we need to transmit (a) frame(s) from mac80211 */
1757
1758 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1759 tids, more_data, false);
1760 }
1761
1762 static void
1763 iwl_mvm_mac_release_buffered_frames(struct ieee80211_hw *hw,
1764 struct ieee80211_sta *sta, u16 tids,
1765 int num_frames,
1766 enum ieee80211_frame_release_type reason,
1767 bool more_data)
1768 {
1769 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1770
1771 /* Called when we need to transmit (a) frame(s) from agg queue */
1772
1773 iwl_mvm_sta_modify_sleep_tx_count(mvm, sta, reason, num_frames,
1774 tids, more_data, true);
1775 }
1776
1777 static void iwl_mvm_mac_sta_notify(struct ieee80211_hw *hw,
1778 struct ieee80211_vif *vif,
1779 enum sta_notify_cmd cmd,
1780 struct ieee80211_sta *sta)
1781 {
1782 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1783 struct iwl_mvm_sta *mvmsta = iwl_mvm_sta_from_mac80211(sta);
1784 int tid;
1785
1786 switch (cmd) {
1787 case STA_NOTIFY_SLEEP:
1788 if (atomic_read(&mvm->pending_frames[mvmsta->sta_id]) > 0)
1789 ieee80211_sta_block_awake(hw, sta, true);
1790 spin_lock_bh(&mvmsta->lock);
1791 for (tid = 0; tid < IWL_MAX_TID_COUNT; tid++) {
1792 struct iwl_mvm_tid_data *tid_data;
1793
1794 tid_data = &mvmsta->tid_data[tid];
1795 if (tid_data->state != IWL_AGG_ON &&
1796 tid_data->state != IWL_EMPTYING_HW_QUEUE_DELBA)
1797 continue;
1798 if (iwl_mvm_tid_queued(tid_data) == 0)
1799 continue;
1800 ieee80211_sta_set_buffered(sta, tid, true);
1801 }
1802 spin_unlock_bh(&mvmsta->lock);
1803 /*
1804 * The fw updates the STA to be asleep. Tx packets on the Tx
1805 * queues to this station will not be transmitted. The fw will
1806 * send a Tx response with TX_STATUS_FAIL_DEST_PS.
1807 */
1808 break;
1809 case STA_NOTIFY_AWAKE:
1810 if (WARN_ON(mvmsta->sta_id == IWL_MVM_STATION_COUNT))
1811 break;
1812 iwl_mvm_sta_modify_ps_wake(mvm, sta);
1813 break;
1814 default:
1815 break;
1816 }
1817 }
1818
1819 static void iwl_mvm_sta_pre_rcu_remove(struct ieee80211_hw *hw,
1820 struct ieee80211_vif *vif,
1821 struct ieee80211_sta *sta)
1822 {
1823 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1824 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
1825
1826 /*
1827 * This is called before mac80211 does RCU synchronisation,
1828 * so here we already invalidate our internal RCU-protected
1829 * station pointer. The rest of the code will thus no longer
1830 * be able to find the station this way, and we don't rely
1831 * on further RCU synchronisation after the sta_state()
1832 * callback deleted the station.
1833 */
1834 mutex_lock(&mvm->mutex);
1835 if (sta == rcu_access_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id]))
1836 rcu_assign_pointer(mvm->fw_id_to_mac_id[mvm_sta->sta_id],
1837 ERR_PTR(-ENOENT));
1838 mutex_unlock(&mvm->mutex);
1839 }
1840
1841 static int iwl_mvm_mac_sta_state(struct ieee80211_hw *hw,
1842 struct ieee80211_vif *vif,
1843 struct ieee80211_sta *sta,
1844 enum ieee80211_sta_state old_state,
1845 enum ieee80211_sta_state new_state)
1846 {
1847 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1848 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1849 int ret;
1850
1851 IWL_DEBUG_MAC80211(mvm, "station %pM state change %d->%d\n",
1852 sta->addr, old_state, new_state);
1853
1854 /* this would be a mac80211 bug ... but don't crash */
1855 if (WARN_ON_ONCE(!mvmvif->phy_ctxt))
1856 return -EINVAL;
1857
1858 /* if a STA is being removed, reuse its ID */
1859 flush_work(&mvm->sta_drained_wk);
1860
1861 mutex_lock(&mvm->mutex);
1862 if (old_state == IEEE80211_STA_NOTEXIST &&
1863 new_state == IEEE80211_STA_NONE) {
1864 /*
1865 * Firmware bug - it'll crash if the beacon interval is less
1866 * than 16. We can't avoid connecting at all, so refuse the
1867 * station state change, this will cause mac80211 to abandon
1868 * attempts to connect to this AP, and eventually wpa_s will
1869 * blacklist the AP...
1870 */
1871 if (vif->type == NL80211_IFTYPE_STATION &&
1872 vif->bss_conf.beacon_int < 16) {
1873 IWL_ERR(mvm,
1874 "AP %pM beacon interval is %d, refusing due to firmware bug!\n",
1875 sta->addr, vif->bss_conf.beacon_int);
1876 ret = -EINVAL;
1877 goto out_unlock;
1878 }
1879 ret = iwl_mvm_add_sta(mvm, vif, sta);
1880 } else if (old_state == IEEE80211_STA_NONE &&
1881 new_state == IEEE80211_STA_AUTH) {
1882 /*
1883 * EBS may be disabled due to previous failures reported by FW.
1884 * Reset EBS status here assuming environment has been changed.
1885 */
1886 mvm->last_ebs_successful = true;
1887 ret = 0;
1888 } else if (old_state == IEEE80211_STA_AUTH &&
1889 new_state == IEEE80211_STA_ASSOC) {
1890 ret = iwl_mvm_update_sta(mvm, vif, sta);
1891 if (ret == 0)
1892 iwl_mvm_rs_rate_init(mvm, sta,
1893 mvmvif->phy_ctxt->channel->band,
1894 true);
1895 } else if (old_state == IEEE80211_STA_ASSOC &&
1896 new_state == IEEE80211_STA_AUTHORIZED) {
1897 /* enable beacon filtering */
1898 WARN_ON(iwl_mvm_enable_beacon_filter(mvm, vif, 0));
1899 ret = 0;
1900 } else if (old_state == IEEE80211_STA_AUTHORIZED &&
1901 new_state == IEEE80211_STA_ASSOC) {
1902 /* disable beacon filtering */
1903 WARN_ON(iwl_mvm_disable_beacon_filter(mvm, vif, 0));
1904 ret = 0;
1905 } else if (old_state == IEEE80211_STA_ASSOC &&
1906 new_state == IEEE80211_STA_AUTH) {
1907 ret = 0;
1908 } else if (old_state == IEEE80211_STA_AUTH &&
1909 new_state == IEEE80211_STA_NONE) {
1910 ret = 0;
1911 } else if (old_state == IEEE80211_STA_NONE &&
1912 new_state == IEEE80211_STA_NOTEXIST) {
1913 ret = iwl_mvm_rm_sta(mvm, vif, sta);
1914 } else {
1915 ret = -EIO;
1916 }
1917 out_unlock:
1918 mutex_unlock(&mvm->mutex);
1919
1920 return ret;
1921 }
1922
1923 static int iwl_mvm_mac_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1924 {
1925 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1926
1927 mvm->rts_threshold = value;
1928
1929 return 0;
1930 }
1931
1932 static void iwl_mvm_sta_rc_update(struct ieee80211_hw *hw,
1933 struct ieee80211_vif *vif,
1934 struct ieee80211_sta *sta, u32 changed)
1935 {
1936 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1937
1938 if (vif->type == NL80211_IFTYPE_STATION &&
1939 changed & IEEE80211_RC_NSS_CHANGED)
1940 iwl_mvm_sf_update(mvm, vif, false);
1941 }
1942
1943 static int iwl_mvm_mac_conf_tx(struct ieee80211_hw *hw,
1944 struct ieee80211_vif *vif, u16 ac,
1945 const struct ieee80211_tx_queue_params *params)
1946 {
1947 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1948 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
1949
1950 mvmvif->queue_params[ac] = *params;
1951
1952 /*
1953 * No need to update right away, we'll get BSS_CHANGED_QOS
1954 * The exception is P2P_DEVICE interface which needs immediate update.
1955 */
1956 if (vif->type == NL80211_IFTYPE_P2P_DEVICE) {
1957 int ret;
1958
1959 mutex_lock(&mvm->mutex);
1960 ret = iwl_mvm_mac_ctxt_changed(mvm, vif, false);
1961 mutex_unlock(&mvm->mutex);
1962 return ret;
1963 }
1964 return 0;
1965 }
1966
1967 static void iwl_mvm_mac_mgd_prepare_tx(struct ieee80211_hw *hw,
1968 struct ieee80211_vif *vif)
1969 {
1970 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1971 u32 duration = min(IWL_MVM_TE_SESSION_PROTECTION_MAX_TIME_MS,
1972 200 + vif->bss_conf.beacon_int);
1973 u32 min_duration = min(IWL_MVM_TE_SESSION_PROTECTION_MIN_TIME_MS,
1974 100 + vif->bss_conf.beacon_int);
1975
1976 if (WARN_ON_ONCE(vif->bss_conf.assoc))
1977 return;
1978
1979 mutex_lock(&mvm->mutex);
1980 /* Try really hard to protect the session and hear a beacon */
1981 iwl_mvm_protect_session(mvm, vif, duration, min_duration, 500);
1982 mutex_unlock(&mvm->mutex);
1983 }
1984
1985 static int iwl_mvm_mac_sched_scan_start(struct ieee80211_hw *hw,
1986 struct ieee80211_vif *vif,
1987 struct cfg80211_sched_scan_request *req,
1988 struct ieee80211_scan_ies *ies)
1989 {
1990 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
1991 int ret;
1992
1993 mutex_lock(&mvm->mutex);
1994
1995 if (!iwl_mvm_is_idle(mvm)) {
1996 ret = -EBUSY;
1997 goto out;
1998 }
1999
2000 switch (mvm->scan_status) {
2001 case IWL_MVM_SCAN_OS:
2002 IWL_DEBUG_SCAN(mvm, "Stopping previous scan for sched_scan\n");
2003 ret = iwl_mvm_cancel_scan(mvm);
2004 if (ret) {
2005 ret = -EBUSY;
2006 goto out;
2007 }
2008
2009 /*
2010 * iwl_mvm_rx_scan_complete() will be called soon but will
2011 * not reset the scan status as it won't be IWL_MVM_SCAN_OS
2012 * any more since we queue the next scan immediately (below).
2013 * We make sure it is called before the next scan starts by
2014 * flushing the async-handlers work.
2015 */
2016 break;
2017 case IWL_MVM_SCAN_NONE:
2018 break;
2019 default:
2020 ret = -EBUSY;
2021 goto out;
2022 }
2023
2024 mvm->scan_status = IWL_MVM_SCAN_SCHED;
2025
2026 if (!(mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)) {
2027 ret = iwl_mvm_config_sched_scan(mvm, vif, req, ies);
2028 if (ret)
2029 goto err;
2030 }
2031
2032 ret = iwl_mvm_config_sched_scan_profiles(mvm, req);
2033 if (ret)
2034 goto err;
2035
2036 if (mvm->fw->ucode_capa.api[0] & IWL_UCODE_TLV_API_LMAC_SCAN)
2037 ret = iwl_mvm_unified_sched_scan_lmac(mvm, vif, req, ies);
2038 else
2039 ret = iwl_mvm_sched_scan_start(mvm, req);
2040
2041 if (!ret)
2042 goto out;
2043 err:
2044 mvm->scan_status = IWL_MVM_SCAN_NONE;
2045 out:
2046 mutex_unlock(&mvm->mutex);
2047 /* make sure to flush the Rx handler before the next scan arrives */
2048 iwl_mvm_wait_for_async_handlers(mvm);
2049 return ret;
2050 }
2051
2052 static int iwl_mvm_mac_sched_scan_stop(struct ieee80211_hw *hw,
2053 struct ieee80211_vif *vif)
2054 {
2055 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2056 int ret;
2057
2058 mutex_lock(&mvm->mutex);
2059 ret = iwl_mvm_scan_offload_stop(mvm, false);
2060 mutex_unlock(&mvm->mutex);
2061 iwl_mvm_wait_for_async_handlers(mvm);
2062
2063 return ret;
2064 }
2065
2066 static int iwl_mvm_mac_set_key(struct ieee80211_hw *hw,
2067 enum set_key_cmd cmd,
2068 struct ieee80211_vif *vif,
2069 struct ieee80211_sta *sta,
2070 struct ieee80211_key_conf *key)
2071 {
2072 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2073 int ret;
2074
2075 if (iwlwifi_mod_params.sw_crypto) {
2076 IWL_DEBUG_MAC80211(mvm, "leave - hwcrypto disabled\n");
2077 return -EOPNOTSUPP;
2078 }
2079
2080 switch (key->cipher) {
2081 case WLAN_CIPHER_SUITE_TKIP:
2082 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2083 /* fall-through */
2084 case WLAN_CIPHER_SUITE_CCMP:
2085 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2086 break;
2087 case WLAN_CIPHER_SUITE_AES_CMAC:
2088 WARN_ON_ONCE(!(hw->flags & IEEE80211_HW_MFP_CAPABLE));
2089 break;
2090 case WLAN_CIPHER_SUITE_WEP40:
2091 case WLAN_CIPHER_SUITE_WEP104:
2092 /*
2093 * Support for TX only, at least for now, so accept
2094 * the key and do nothing else. Then mac80211 will
2095 * pass it for TX but we don't have to use it for RX.
2096 */
2097 return 0;
2098 default:
2099 /* currently FW supports only one optional cipher scheme */
2100 if (hw->n_cipher_schemes &&
2101 hw->cipher_schemes->cipher == key->cipher)
2102 key->flags |= IEEE80211_KEY_FLAG_PUT_IV_SPACE;
2103 else
2104 return -EOPNOTSUPP;
2105 }
2106
2107 mutex_lock(&mvm->mutex);
2108
2109 switch (cmd) {
2110 case SET_KEY:
2111 if ((vif->type == NL80211_IFTYPE_ADHOC ||
2112 vif->type == NL80211_IFTYPE_AP) && !sta) {
2113 /*
2114 * GTK on AP interface is a TX-only key, return 0;
2115 * on IBSS they're per-station and because we're lazy
2116 * we don't support them for RX, so do the same.
2117 */
2118 ret = 0;
2119 key->hw_key_idx = STA_KEY_IDX_INVALID;
2120 break;
2121 }
2122
2123 IWL_DEBUG_MAC80211(mvm, "set hwcrypto key\n");
2124 ret = iwl_mvm_set_sta_key(mvm, vif, sta, key, false);
2125 if (ret) {
2126 IWL_WARN(mvm, "set key failed\n");
2127 /*
2128 * can't add key for RX, but we don't need it
2129 * in the device for TX so still return 0
2130 */
2131 key->hw_key_idx = STA_KEY_IDX_INVALID;
2132 ret = 0;
2133 }
2134
2135 break;
2136 case DISABLE_KEY:
2137 if (key->hw_key_idx == STA_KEY_IDX_INVALID) {
2138 ret = 0;
2139 break;
2140 }
2141
2142 IWL_DEBUG_MAC80211(mvm, "disable hwcrypto key\n");
2143 ret = iwl_mvm_remove_sta_key(mvm, vif, sta, key);
2144 break;
2145 default:
2146 ret = -EINVAL;
2147 }
2148
2149 mutex_unlock(&mvm->mutex);
2150 return ret;
2151 }
2152
2153 static void iwl_mvm_mac_update_tkip_key(struct ieee80211_hw *hw,
2154 struct ieee80211_vif *vif,
2155 struct ieee80211_key_conf *keyconf,
2156 struct ieee80211_sta *sta,
2157 u32 iv32, u16 *phase1key)
2158 {
2159 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2160
2161 if (keyconf->hw_key_idx == STA_KEY_IDX_INVALID)
2162 return;
2163
2164 iwl_mvm_update_tkip_key(mvm, vif, keyconf, sta, iv32, phase1key);
2165 }
2166
2167
2168 static int iwl_mvm_roc(struct ieee80211_hw *hw,
2169 struct ieee80211_vif *vif,
2170 struct ieee80211_channel *channel,
2171 int duration,
2172 enum ieee80211_roc_type type)
2173 {
2174 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2175 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2176 struct cfg80211_chan_def chandef;
2177 struct iwl_mvm_phy_ctxt *phy_ctxt;
2178 int ret, i;
2179
2180 IWL_DEBUG_MAC80211(mvm, "enter (%d, %d, %d)\n", channel->hw_value,
2181 duration, type);
2182
2183 if (vif->type != NL80211_IFTYPE_P2P_DEVICE) {
2184 IWL_ERR(mvm, "vif isn't a P2P_DEVICE: %d\n", vif->type);
2185 return -EINVAL;
2186 }
2187
2188 mutex_lock(&mvm->mutex);
2189
2190 for (i = 0; i < NUM_PHY_CTX; i++) {
2191 phy_ctxt = &mvm->phy_ctxts[i];
2192 if (phy_ctxt->ref == 0 || mvmvif->phy_ctxt == phy_ctxt)
2193 continue;
2194
2195 if (phy_ctxt->ref && channel == phy_ctxt->channel) {
2196 /*
2197 * Unbind the P2P_DEVICE from the current PHY context,
2198 * and if the PHY context is not used remove it.
2199 */
2200 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2201 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2202 goto out_unlock;
2203
2204 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2205
2206 /* Bind the P2P_DEVICE to the current PHY Context */
2207 mvmvif->phy_ctxt = phy_ctxt;
2208
2209 ret = iwl_mvm_binding_add_vif(mvm, vif);
2210 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2211 goto out_unlock;
2212
2213 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2214 goto schedule_time_event;
2215 }
2216 }
2217
2218 /* Need to update the PHY context only if the ROC channel changed */
2219 if (channel == mvmvif->phy_ctxt->channel)
2220 goto schedule_time_event;
2221
2222 cfg80211_chandef_create(&chandef, channel, NL80211_CHAN_NO_HT);
2223
2224 /*
2225 * Change the PHY context configuration as it is currently referenced
2226 * only by the P2P Device MAC
2227 */
2228 if (mvmvif->phy_ctxt->ref == 1) {
2229 ret = iwl_mvm_phy_ctxt_changed(mvm, mvmvif->phy_ctxt,
2230 &chandef, 1, 1);
2231 if (ret)
2232 goto out_unlock;
2233 } else {
2234 /*
2235 * The PHY context is shared with other MACs. Need to remove the
2236 * P2P Device from the binding, allocate an new PHY context and
2237 * create a new binding
2238 */
2239 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2240 if (!phy_ctxt) {
2241 ret = -ENOSPC;
2242 goto out_unlock;
2243 }
2244
2245 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &chandef,
2246 1, 1);
2247 if (ret) {
2248 IWL_ERR(mvm, "Failed to change PHY context\n");
2249 goto out_unlock;
2250 }
2251
2252 /* Unbind the P2P_DEVICE from the current PHY context */
2253 ret = iwl_mvm_binding_remove_vif(mvm, vif);
2254 if (WARN(ret, "Failed unbinding P2P_DEVICE\n"))
2255 goto out_unlock;
2256
2257 iwl_mvm_phy_ctxt_unref(mvm, mvmvif->phy_ctxt);
2258
2259 /* Bind the P2P_DEVICE to the new allocated PHY context */
2260 mvmvif->phy_ctxt = phy_ctxt;
2261
2262 ret = iwl_mvm_binding_add_vif(mvm, vif);
2263 if (WARN(ret, "Failed binding P2P_DEVICE\n"))
2264 goto out_unlock;
2265
2266 iwl_mvm_phy_ctxt_ref(mvm, mvmvif->phy_ctxt);
2267 }
2268
2269 schedule_time_event:
2270 /* Schedule the time events */
2271 ret = iwl_mvm_start_p2p_roc(mvm, vif, duration, type);
2272
2273 out_unlock:
2274 mutex_unlock(&mvm->mutex);
2275 IWL_DEBUG_MAC80211(mvm, "leave\n");
2276 return ret;
2277 }
2278
2279 static int iwl_mvm_cancel_roc(struct ieee80211_hw *hw)
2280 {
2281 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2282
2283 IWL_DEBUG_MAC80211(mvm, "enter\n");
2284
2285 mutex_lock(&mvm->mutex);
2286 iwl_mvm_stop_p2p_roc(mvm);
2287 mutex_unlock(&mvm->mutex);
2288
2289 IWL_DEBUG_MAC80211(mvm, "leave\n");
2290 return 0;
2291 }
2292
2293 static int __iwl_mvm_add_chanctx(struct iwl_mvm *mvm,
2294 struct ieee80211_chanctx_conf *ctx)
2295 {
2296 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2297 struct iwl_mvm_phy_ctxt *phy_ctxt;
2298 int ret;
2299
2300 lockdep_assert_held(&mvm->mutex);
2301
2302 IWL_DEBUG_MAC80211(mvm, "Add channel context\n");
2303
2304 phy_ctxt = iwl_mvm_get_free_phy_ctxt(mvm);
2305 if (!phy_ctxt) {
2306 ret = -ENOSPC;
2307 goto out;
2308 }
2309
2310 ret = iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2311 ctx->rx_chains_static,
2312 ctx->rx_chains_dynamic);
2313 if (ret) {
2314 IWL_ERR(mvm, "Failed to add PHY context\n");
2315 goto out;
2316 }
2317
2318 iwl_mvm_phy_ctxt_ref(mvm, phy_ctxt);
2319 *phy_ctxt_id = phy_ctxt->id;
2320 out:
2321 return ret;
2322 }
2323
2324 static int iwl_mvm_add_chanctx(struct ieee80211_hw *hw,
2325 struct ieee80211_chanctx_conf *ctx)
2326 {
2327 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2328 int ret;
2329
2330 mutex_lock(&mvm->mutex);
2331 ret = __iwl_mvm_add_chanctx(mvm, ctx);
2332 mutex_unlock(&mvm->mutex);
2333
2334 return ret;
2335 }
2336
2337 static void __iwl_mvm_remove_chanctx(struct iwl_mvm *mvm,
2338 struct ieee80211_chanctx_conf *ctx)
2339 {
2340 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2341 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2342
2343 lockdep_assert_held(&mvm->mutex);
2344
2345 iwl_mvm_phy_ctxt_unref(mvm, phy_ctxt);
2346 }
2347
2348 static void iwl_mvm_remove_chanctx(struct ieee80211_hw *hw,
2349 struct ieee80211_chanctx_conf *ctx)
2350 {
2351 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2352
2353 mutex_lock(&mvm->mutex);
2354 __iwl_mvm_remove_chanctx(mvm, ctx);
2355 mutex_unlock(&mvm->mutex);
2356 }
2357
2358 static void iwl_mvm_change_chanctx(struct ieee80211_hw *hw,
2359 struct ieee80211_chanctx_conf *ctx,
2360 u32 changed)
2361 {
2362 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2363 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2364 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2365
2366 if (WARN_ONCE((phy_ctxt->ref > 1) &&
2367 (changed & ~(IEEE80211_CHANCTX_CHANGE_WIDTH |
2368 IEEE80211_CHANCTX_CHANGE_RX_CHAINS |
2369 IEEE80211_CHANCTX_CHANGE_RADAR |
2370 IEEE80211_CHANCTX_CHANGE_MIN_WIDTH)),
2371 "Cannot change PHY. Ref=%d, changed=0x%X\n",
2372 phy_ctxt->ref, changed))
2373 return;
2374
2375 mutex_lock(&mvm->mutex);
2376 iwl_mvm_bt_coex_vif_change(mvm);
2377 iwl_mvm_phy_ctxt_changed(mvm, phy_ctxt, &ctx->min_def,
2378 ctx->rx_chains_static,
2379 ctx->rx_chains_dynamic);
2380 mutex_unlock(&mvm->mutex);
2381 }
2382
2383 static int __iwl_mvm_assign_vif_chanctx(struct iwl_mvm *mvm,
2384 struct ieee80211_vif *vif,
2385 struct ieee80211_chanctx_conf *ctx,
2386 bool switching_chanctx)
2387 {
2388 u16 *phy_ctxt_id = (u16 *)ctx->drv_priv;
2389 struct iwl_mvm_phy_ctxt *phy_ctxt = &mvm->phy_ctxts[*phy_ctxt_id];
2390 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2391 int ret;
2392
2393 lockdep_assert_held(&mvm->mutex);
2394
2395 mvmvif->phy_ctxt = phy_ctxt;
2396
2397 switch (vif->type) {
2398 case NL80211_IFTYPE_AP:
2399 /* Unless it's a CSA flow we have nothing to do here */
2400 if (vif->csa_active) {
2401 mvmvif->ap_ibss_active = true;
2402 break;
2403 }
2404 case NL80211_IFTYPE_ADHOC:
2405 /*
2406 * The AP binding flow is handled as part of the start_ap flow
2407 * (in bss_info_changed), similarly for IBSS.
2408 */
2409 ret = 0;
2410 goto out;
2411 case NL80211_IFTYPE_STATION:
2412 case NL80211_IFTYPE_MONITOR:
2413 break;
2414 default:
2415 ret = -EINVAL;
2416 goto out;
2417 }
2418
2419 ret = iwl_mvm_binding_add_vif(mvm, vif);
2420 if (ret)
2421 goto out;
2422
2423 /*
2424 * Power state must be updated before quotas,
2425 * otherwise fw will complain.
2426 */
2427 iwl_mvm_power_update_mac(mvm);
2428
2429 /* Setting the quota at this stage is only required for monitor
2430 * interfaces. For the other types, the bss_info changed flow
2431 * will handle quota settings.
2432 */
2433 if (vif->type == NL80211_IFTYPE_MONITOR) {
2434 mvmvif->monitor_active = true;
2435 ret = iwl_mvm_update_quotas(mvm, NULL);
2436 if (ret)
2437 goto out_remove_binding;
2438 }
2439
2440 /* Handle binding during CSA */
2441 if ((vif->type == NL80211_IFTYPE_AP) ||
2442 (switching_chanctx && (vif->type == NL80211_IFTYPE_STATION))) {
2443 iwl_mvm_update_quotas(mvm, NULL);
2444 iwl_mvm_mac_ctxt_changed(mvm, vif, false);
2445 }
2446
2447 goto out;
2448
2449 out_remove_binding:
2450 iwl_mvm_binding_remove_vif(mvm, vif);
2451 iwl_mvm_power_update_mac(mvm);
2452 out:
2453 if (ret)
2454 mvmvif->phy_ctxt = NULL;
2455 return ret;
2456 }
2457 static int iwl_mvm_assign_vif_chanctx(struct ieee80211_hw *hw,
2458 struct ieee80211_vif *vif,
2459 struct ieee80211_chanctx_conf *ctx)
2460 {
2461 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2462 int ret;
2463
2464 mutex_lock(&mvm->mutex);
2465 ret = __iwl_mvm_assign_vif_chanctx(mvm, vif, ctx, false);
2466 mutex_unlock(&mvm->mutex);
2467
2468 return ret;
2469 }
2470
2471 static void __iwl_mvm_unassign_vif_chanctx(struct iwl_mvm *mvm,
2472 struct ieee80211_vif *vif,
2473 struct ieee80211_chanctx_conf *ctx,
2474 bool switching_chanctx)
2475 {
2476 struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
2477 struct ieee80211_vif *disabled_vif = NULL;
2478
2479 lockdep_assert_held(&mvm->mutex);
2480
2481 iwl_mvm_remove_time_event(mvm, mvmvif, &mvmvif->time_event_data);
2482
2483 switch (vif->type) {
2484 case NL80211_IFTYPE_ADHOC:
2485 goto out;
2486 case NL80211_IFTYPE_MONITOR:
2487 mvmvif->monitor_active = false;
2488 break;
2489 case NL80211_IFTYPE_AP:
2490 /* This part is triggered only during CSA */
2491 if (!vif->csa_active || !mvmvif->ap_ibss_active)
2492 goto out;
2493
2494 mvmvif->ap_ibss_active = false;
2495 break;
2496 case NL80211_IFTYPE_STATION:
2497 if (!switching_chanctx)
2498 break;
2499
2500 disabled_vif = vif;
2501
2502 iwl_mvm_mac_ctxt_changed(mvm, vif, true);
2503 break;
2504 default:
2505 break;
2506 }
2507
2508 iwl_mvm_update_quotas(mvm, disabled_vif);
2509 iwl_mvm_binding_remove_vif(mvm, vif);
2510
2511 out:
2512 mvmvif->phy_ctxt = NULL;
2513 iwl_mvm_power_update_mac(mvm);
2514 }
2515
2516 static void iwl_mvm_unassign_vif_chanctx(struct ieee80211_hw *hw,
2517 struct ieee80211_vif *vif,
2518 struct ieee80211_chanctx_conf *ctx)
2519 {
2520 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2521
2522 mutex_lock(&mvm->mutex);
2523 __iwl_mvm_unassign_vif_chanctx(mvm, vif, ctx, false);
2524 mutex_unlock(&mvm->mutex);
2525 }
2526
2527 static int iwl_mvm_switch_vif_chanctx(struct ieee80211_hw *hw,
2528 struct ieee80211_vif_chanctx_switch *vifs,
2529 int n_vifs,
2530 enum ieee80211_chanctx_switch_mode mode)
2531 {
2532 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2533 int ret;
2534
2535 /* we only support SWAP_CONTEXTS and with a single-vif right now */
2536 if (mode != CHANCTX_SWMODE_SWAP_CONTEXTS || n_vifs > 1)
2537 return -EOPNOTSUPP;
2538
2539 mutex_lock(&mvm->mutex);
2540 __iwl_mvm_unassign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx, true);
2541 __iwl_mvm_remove_chanctx(mvm, vifs[0].old_ctx);
2542
2543 ret = __iwl_mvm_add_chanctx(mvm, vifs[0].new_ctx);
2544 if (ret) {
2545 IWL_ERR(mvm, "failed to add new_ctx during channel switch\n");
2546 goto out_reassign;
2547 }
2548
2549 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].new_ctx,
2550 true);
2551 if (ret) {
2552 IWL_ERR(mvm,
2553 "failed to assign new_ctx during channel switch\n");
2554 goto out_remove;
2555 }
2556
2557 goto out;
2558
2559 out_remove:
2560 __iwl_mvm_remove_chanctx(mvm, vifs[0].new_ctx);
2561
2562 out_reassign:
2563 ret = __iwl_mvm_add_chanctx(mvm, vifs[0].old_ctx);
2564 if (ret) {
2565 IWL_ERR(mvm, "failed to add old_ctx back after failure.\n");
2566 goto out_restart;
2567 }
2568
2569 ret = __iwl_mvm_assign_vif_chanctx(mvm, vifs[0].vif, vifs[0].old_ctx,
2570 true);
2571 if (ret) {
2572 IWL_ERR(mvm, "failed to reassign old_ctx after failure.\n");
2573 goto out_restart;
2574 }
2575
2576 goto out;
2577
2578 out_restart:
2579 /* things keep failing, better restart the hw */
2580 iwl_mvm_nic_restart(mvm, false);
2581
2582 out:
2583 mutex_unlock(&mvm->mutex);
2584 return ret;
2585 }
2586
2587 static int iwl_mvm_set_tim(struct ieee80211_hw *hw,
2588 struct ieee80211_sta *sta,
2589 bool set)
2590 {
2591 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2592 struct iwl_mvm_sta *mvm_sta = (void *)sta->drv_priv;
2593
2594 if (!mvm_sta || !mvm_sta->vif) {
2595 IWL_ERR(mvm, "Station is not associated to a vif\n");
2596 return -EINVAL;
2597 }
2598
2599 return iwl_mvm_mac_ctxt_beacon_changed(mvm, mvm_sta->vif);
2600 }
2601
2602 #ifdef CONFIG_NL80211_TESTMODE
2603 static const struct nla_policy iwl_mvm_tm_policy[IWL_MVM_TM_ATTR_MAX + 1] = {
2604 [IWL_MVM_TM_ATTR_CMD] = { .type = NLA_U32 },
2605 [IWL_MVM_TM_ATTR_NOA_DURATION] = { .type = NLA_U32 },
2606 [IWL_MVM_TM_ATTR_BEACON_FILTER_STATE] = { .type = NLA_U32 },
2607 };
2608
2609 static int __iwl_mvm_mac_testmode_cmd(struct iwl_mvm *mvm,
2610 struct ieee80211_vif *vif,
2611 void *data, int len)
2612 {
2613 struct nlattr *tb[IWL_MVM_TM_ATTR_MAX + 1];
2614 int err;
2615 u32 noa_duration;
2616
2617 err = nla_parse(tb, IWL_MVM_TM_ATTR_MAX, data, len, iwl_mvm_tm_policy);
2618 if (err)
2619 return err;
2620
2621 if (!tb[IWL_MVM_TM_ATTR_CMD])
2622 return -EINVAL;
2623
2624 switch (nla_get_u32(tb[IWL_MVM_TM_ATTR_CMD])) {
2625 case IWL_MVM_TM_CMD_SET_NOA:
2626 if (!vif || vif->type != NL80211_IFTYPE_AP || !vif->p2p ||
2627 !vif->bss_conf.enable_beacon ||
2628 !tb[IWL_MVM_TM_ATTR_NOA_DURATION])
2629 return -EINVAL;
2630
2631 noa_duration = nla_get_u32(tb[IWL_MVM_TM_ATTR_NOA_DURATION]);
2632 if (noa_duration >= vif->bss_conf.beacon_int)
2633 return -EINVAL;
2634
2635 mvm->noa_duration = noa_duration;
2636 mvm->noa_vif = vif;
2637
2638 return iwl_mvm_update_quotas(mvm, NULL);
2639 case IWL_MVM_TM_CMD_SET_BEACON_FILTER:
2640 /* must be associated client vif - ignore authorized */
2641 if (!vif || vif->type != NL80211_IFTYPE_STATION ||
2642 !vif->bss_conf.assoc || !vif->bss_conf.dtim_period ||
2643 !tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE])
2644 return -EINVAL;
2645
2646 if (nla_get_u32(tb[IWL_MVM_TM_ATTR_BEACON_FILTER_STATE]))
2647 return iwl_mvm_enable_beacon_filter(mvm, vif, 0);
2648 return iwl_mvm_disable_beacon_filter(mvm, vif, 0);
2649 }
2650
2651 return -EOPNOTSUPP;
2652 }
2653
2654 static int iwl_mvm_mac_testmode_cmd(struct ieee80211_hw *hw,
2655 struct ieee80211_vif *vif,
2656 void *data, int len)
2657 {
2658 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2659 int err;
2660
2661 mutex_lock(&mvm->mutex);
2662 err = __iwl_mvm_mac_testmode_cmd(mvm, vif, data, len);
2663 mutex_unlock(&mvm->mutex);
2664
2665 return err;
2666 }
2667 #endif
2668
2669 static void iwl_mvm_channel_switch_beacon(struct ieee80211_hw *hw,
2670 struct ieee80211_vif *vif,
2671 struct cfg80211_chan_def *chandef)
2672 {
2673 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2674 struct ieee80211_vif *csa_vif;
2675
2676 mutex_lock(&mvm->mutex);
2677
2678 csa_vif = rcu_dereference_protected(mvm->csa_vif,
2679 lockdep_is_held(&mvm->mutex));
2680 if (WARN(csa_vif && csa_vif->csa_active,
2681 "Another CSA is already in progress"))
2682 goto out_unlock;
2683
2684 IWL_DEBUG_MAC80211(mvm, "CSA started to freq %d\n",
2685 chandef->center_freq1);
2686 rcu_assign_pointer(mvm->csa_vif, vif);
2687
2688 out_unlock:
2689 mutex_unlock(&mvm->mutex);
2690 }
2691
2692 static void iwl_mvm_mac_flush(struct ieee80211_hw *hw,
2693 struct ieee80211_vif *vif, u32 queues, bool drop)
2694 {
2695 struct iwl_mvm *mvm = IWL_MAC80211_GET_MVM(hw);
2696 struct iwl_mvm_vif *mvmvif;
2697 struct iwl_mvm_sta *mvmsta;
2698
2699 if (!vif || vif->type != NL80211_IFTYPE_STATION)
2700 return;
2701
2702 mutex_lock(&mvm->mutex);
2703 mvmvif = iwl_mvm_vif_from_mac80211(vif);
2704 mvmsta = iwl_mvm_sta_from_staid_protected(mvm, mvmvif->ap_sta_id);
2705
2706 if (WARN_ON_ONCE(!mvmsta))
2707 goto done;
2708
2709 if (drop) {
2710 if (iwl_mvm_flush_tx_path(mvm, mvmsta->tfd_queue_msk, true))
2711 IWL_ERR(mvm, "flush request fail\n");
2712 } else {
2713 iwl_trans_wait_tx_queue_empty(mvm->trans,
2714 mvmsta->tfd_queue_msk);
2715 }
2716 done:
2717 mutex_unlock(&mvm->mutex);
2718 }
2719
2720 const struct ieee80211_ops iwl_mvm_hw_ops = {
2721 .tx = iwl_mvm_mac_tx,
2722 .ampdu_action = iwl_mvm_mac_ampdu_action,
2723 .start = iwl_mvm_mac_start,
2724 .restart_complete = iwl_mvm_mac_restart_complete,
2725 .stop = iwl_mvm_mac_stop,
2726 .add_interface = iwl_mvm_mac_add_interface,
2727 .remove_interface = iwl_mvm_mac_remove_interface,
2728 .config = iwl_mvm_mac_config,
2729 .prepare_multicast = iwl_mvm_prepare_multicast,
2730 .configure_filter = iwl_mvm_configure_filter,
2731 .bss_info_changed = iwl_mvm_bss_info_changed,
2732 .hw_scan = iwl_mvm_mac_hw_scan,
2733 .cancel_hw_scan = iwl_mvm_mac_cancel_hw_scan,
2734 .sta_pre_rcu_remove = iwl_mvm_sta_pre_rcu_remove,
2735 .sta_state = iwl_mvm_mac_sta_state,
2736 .sta_notify = iwl_mvm_mac_sta_notify,
2737 .allow_buffered_frames = iwl_mvm_mac_allow_buffered_frames,
2738 .release_buffered_frames = iwl_mvm_mac_release_buffered_frames,
2739 .set_rts_threshold = iwl_mvm_mac_set_rts_threshold,
2740 .sta_rc_update = iwl_mvm_sta_rc_update,
2741 .conf_tx = iwl_mvm_mac_conf_tx,
2742 .mgd_prepare_tx = iwl_mvm_mac_mgd_prepare_tx,
2743 .flush = iwl_mvm_mac_flush,
2744 .sched_scan_start = iwl_mvm_mac_sched_scan_start,
2745 .sched_scan_stop = iwl_mvm_mac_sched_scan_stop,
2746 .set_key = iwl_mvm_mac_set_key,
2747 .update_tkip_key = iwl_mvm_mac_update_tkip_key,
2748 .remain_on_channel = iwl_mvm_roc,
2749 .cancel_remain_on_channel = iwl_mvm_cancel_roc,
2750 .add_chanctx = iwl_mvm_add_chanctx,
2751 .remove_chanctx = iwl_mvm_remove_chanctx,
2752 .change_chanctx = iwl_mvm_change_chanctx,
2753 .assign_vif_chanctx = iwl_mvm_assign_vif_chanctx,
2754 .unassign_vif_chanctx = iwl_mvm_unassign_vif_chanctx,
2755 .switch_vif_chanctx = iwl_mvm_switch_vif_chanctx,
2756
2757 .start_ap = iwl_mvm_start_ap_ibss,
2758 .stop_ap = iwl_mvm_stop_ap_ibss,
2759 .join_ibss = iwl_mvm_start_ap_ibss,
2760 .leave_ibss = iwl_mvm_stop_ap_ibss,
2761
2762 .set_tim = iwl_mvm_set_tim,
2763
2764 .channel_switch_beacon = iwl_mvm_channel_switch_beacon,
2765
2766 CFG80211_TESTMODE_CMD(iwl_mvm_mac_testmode_cmd)
2767
2768 #ifdef CONFIG_PM_SLEEP
2769 /* look at d3.c */
2770 .suspend = iwl_mvm_suspend,
2771 .resume = iwl_mvm_resume,
2772 .set_wakeup = iwl_mvm_set_wakeup,
2773 .set_rekey_data = iwl_mvm_set_rekey_data,
2774 #if IS_ENABLED(CONFIG_IPV6)
2775 .ipv6_addr_change = iwl_mvm_ipv6_addr_change,
2776 #endif
2777 .set_default_unicast_key = iwl_mvm_set_default_unicast_key,
2778 #endif
2779 };
Linux kernel - Deliverables
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