net/mac80211/ieee80211_i.h

   1 /*
   2  * Copyright 2002-2005, Instant802 Networks, Inc.
   3  * Copyright 2005, Devicescape Software, Inc.
   4  * Copyright 2006-2007  Jiri Benc <jbenc@suse.cz>
   5  * Copyright 2007-2010  Johannes Berg <johannes@sipsolutions.net>
   6  * Copyright 2013-2015  Intel Mobile Communications GmbH
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef IEEE80211_I_H
  14 #define IEEE80211_I_H
  15
  16 #include <linux/kernel.h>
  17 #include <linux/device.h>
  18 #include <linux/if_ether.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/list.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/skbuff.h>
  23 #include <linux/workqueue.h>
  24 #include <linux/types.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/etherdevice.h>
  27 #include <linux/leds.h>
  28 #include <linux/idr.h>
  29 #include <linux/rhashtable.h>
  30 #include <net/ieee80211_radiotap.h>
  31 #include <net/cfg80211.h>
  32 #include <net/mac80211.h>
  33 #include <net/fq.h>
  34 #include "key.h"
  35 #include "sta_info.h"
  36 #include "debug.h"
  37
  38 extern const struct cfg80211_ops mac80211_config_ops;
  39
  40 struct ieee80211_local;
  41
  42 /* Maximum number of broadcast/multicast frames to buffer when some of the
  43  * associated stations are using power saving. */
  44 #define AP_MAX_BC_BUFFER 128
  45
  46 /* Maximum number of frames buffered to all STAs, including multicast frames.
  47  * Note: increasing this limit increases the potential memory requirement. Each
  48  * frame can be up to about 2 kB long. */
  49 #define TOTAL_MAX_TX_BUFFER 512
  50
  51 /* Required encryption head and tailroom */
  52 #define IEEE80211_ENCRYPT_HEADROOM 8
  53 #define IEEE80211_ENCRYPT_TAILROOM 18
  54
  55 /* IEEE 802.11 (Ch. 9.5 Defragmentation) requires support for concurrent
  56  * reception of at least three fragmented frames. This limit can be increased
  57  * by changing this define, at the cost of slower frame reassembly and
  58  * increased memory use (about 2 kB of RAM per entry). */
  59 #define IEEE80211_FRAGMENT_MAX 4
  60
  61 /* power level hasn't been configured (or set to automatic) */
  62 #define IEEE80211_UNSET_POWER_LEVEL     INT_MIN
  63
  64 /*
  65  * Some APs experience problems when working with U-APSD. Decreasing the
  66  * probability of that happening by using legacy mode for all ACs but VO isn't
  67  * enough.
  68  *
  69  * Cisco 4410N originally forced us to enable VO by default only because it
  70  * treated non-VO ACs as legacy.
  71  *
  72  * However some APs (notably Netgear R7000) silently reclassify packets to
  73  * different ACs. Since u-APSD ACs require trigger frames for frame retrieval
  74  * clients would never see some frames (e.g. ARP responses) or would fetch them
  75  * accidentally after a long time.
  76  *
  77  * It makes little sense to enable u-APSD queues by default because it needs
  78  * userspace applications to be aware of it to actually take advantage of the
  79  * possible additional powersavings. Implicitly depending on driver autotrigger
  80  * frame support doesn't make much sense.
  81  */
  82 #define IEEE80211_DEFAULT_UAPSD_QUEUES 0
  83
  84 #define IEEE80211_DEFAULT_MAX_SP_LEN            \
  85         IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL
  86
  87 extern const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS];
  88
  89 #define IEEE80211_DEAUTH_FRAME_LEN      (24 /* hdr */ + 2 /* reason */)
  90
  91 #define IEEE80211_MAX_NAN_INSTANCE_ID 255
  92
  93 struct ieee80211_fragment_entry {
  94         struct sk_buff_head skb_list;
  95         unsigned long first_frag_time;
  96         u16 seq;
  97         u16 extra_len;
  98         u16 last_frag;
  99         u8 rx_queue;
 100         bool check_sequential_pn; /* needed for CCMP/GCMP */
 101         u8 last_pn[6]; /* PN of the last fragment if CCMP was used */
 102 };
 103
 104
 105 struct ieee80211_bss {
 106         u32 device_ts_beacon, device_ts_presp;
 107
 108         bool wmm_used;
 109         bool uapsd_supported;
 110
 111 #define IEEE80211_MAX_SUPP_RATES 32
 112         u8 supp_rates[IEEE80211_MAX_SUPP_RATES];
 113         size_t supp_rates_len;
 114         struct ieee80211_rate *beacon_rate;
 115
 116         /*
 117          * During association, we save an ERP value from a probe response so
 118          * that we can feed ERP info to the driver when handling the
 119          * association completes. these fields probably won't be up-to-date
 120          * otherwise, you probably don't want to use them.
 121          */
 122         bool has_erp_value;
 123         u8 erp_value;
 124
 125         /* Keep track of the corruption of the last beacon/probe response. */
 126         u8 corrupt_data;
 127
 128         /* Keep track of what bits of information we have valid info for. */
 129         u8 valid_data;
 130 };
 131
 132 /**
 133  * enum ieee80211_corrupt_data_flags - BSS data corruption flags
 134  * @IEEE80211_BSS_CORRUPT_BEACON: last beacon frame received was corrupted
 135  * @IEEE80211_BSS_CORRUPT_PROBE_RESP: last probe response received was corrupted
 136  *
 137  * These are bss flags that are attached to a bss in the
 138  * @corrupt_data field of &struct ieee80211_bss.
 139  */
 140 enum ieee80211_bss_corrupt_data_flags {
 141         IEEE80211_BSS_CORRUPT_BEACON            = BIT(0),
 142         IEEE80211_BSS_CORRUPT_PROBE_RESP        = BIT(1)
 143 };
 144
 145 /**
 146  * enum ieee80211_valid_data_flags - BSS valid data flags
 147  * @IEEE80211_BSS_VALID_WMM: WMM/UAPSD data was gathered from non-corrupt IE
 148  * @IEEE80211_BSS_VALID_RATES: Supported rates were gathered from non-corrupt IE
 149  * @IEEE80211_BSS_VALID_ERP: ERP flag was gathered from non-corrupt IE
 150  *
 151  * These are bss flags that are attached to a bss in the
 152  * @valid_data field of &struct ieee80211_bss.  They show which parts
 153  * of the data structure were received as a result of an un-corrupted
 154  * beacon/probe response.
 155  */
 156 enum ieee80211_bss_valid_data_flags {
 157         IEEE80211_BSS_VALID_WMM                 = BIT(1),
 158         IEEE80211_BSS_VALID_RATES               = BIT(2),
 159         IEEE80211_BSS_VALID_ERP                 = BIT(3)
 160 };
 161
 162 typedef unsigned __bitwise ieee80211_tx_result;
 163 #define TX_CONTINUE     ((__force ieee80211_tx_result) 0u)
 164 #define TX_DROP         ((__force ieee80211_tx_result) 1u)
 165 #define TX_QUEUED       ((__force ieee80211_tx_result) 2u)
 166
 167 #define IEEE80211_TX_UNICAST            BIT(1)
 168 #define IEEE80211_TX_PS_BUFFERED        BIT(2)
 169
 170 struct ieee80211_tx_data {
 171         struct sk_buff *skb;
 172         struct sk_buff_head skbs;
 173         struct ieee80211_local *local;
 174         struct ieee80211_sub_if_data *sdata;
 175         struct sta_info *sta;
 176         struct ieee80211_key *key;
 177         struct ieee80211_tx_rate rate;
 178
 179         unsigned int flags;
 180 };
 181
 182
 183 typedef unsigned __bitwise ieee80211_rx_result;
 184 #define RX_CONTINUE             ((__force ieee80211_rx_result) 0u)
 185 #define RX_DROP_UNUSABLE        ((__force ieee80211_rx_result) 1u)
 186 #define RX_DROP_MONITOR         ((__force ieee80211_rx_result) 2u)
 187 #define RX_QUEUED               ((__force ieee80211_rx_result) 3u)
 188
 189 /**
 190  * enum ieee80211_packet_rx_flags - packet RX flags
 191  * @IEEE80211_RX_AMSDU: a-MSDU packet
 192  * @IEEE80211_RX_MALFORMED_ACTION_FRM: action frame is malformed
 193  * @IEEE80211_RX_DEFERRED_RELEASE: frame was subjected to receive reordering
 194  *
 195  * These are per-frame flags that are attached to a frame in the
 196  * @rx_flags field of &struct ieee80211_rx_status.
 197  */
 198 enum ieee80211_packet_rx_flags {
 199         IEEE80211_RX_AMSDU                      = BIT(3),
 200         IEEE80211_RX_MALFORMED_ACTION_FRM       = BIT(4),
 201         IEEE80211_RX_DEFERRED_RELEASE           = BIT(5),
 202 };
 203
 204 /**
 205  * enum ieee80211_rx_flags - RX data flags
 206  *
 207  * @IEEE80211_RX_CMNTR: received on cooked monitor already
 208  * @IEEE80211_RX_BEACON_REPORTED: This frame was already reported
 209  *      to cfg80211_report_obss_beacon().
 210  *
 211  * These flags are used across handling multiple interfaces
 212  * for a single frame.
 213  */
 214 enum ieee80211_rx_flags {
 215         IEEE80211_RX_CMNTR              = BIT(0),
 216         IEEE80211_RX_BEACON_REPORTED    = BIT(1),
 217 };
 218
 219 struct ieee80211_rx_data {
 220         struct napi_struct *napi;
 221         struct sk_buff *skb;
 222         struct ieee80211_local *local;
 223         struct ieee80211_sub_if_data *sdata;
 224         struct sta_info *sta;
 225         struct ieee80211_key *key;
 226
 227         unsigned int flags;
 228
 229         /*
 230          * Index into sequence numbers array, 0..16
 231          * since the last (16) is used for non-QoS,
 232          * will be 16 on non-QoS frames.
 233          */
 234         int seqno_idx;
 235
 236         /*
 237          * Index into the security IV/PN arrays, 0..16
 238          * since the last (16) is used for CCMP-encrypted
 239          * management frames, will be set to 16 on mgmt
 240          * frames and 0 on non-QoS frames.
 241          */
 242         int security_idx;
 243
 244         u32 tkip_iv32;
 245         u16 tkip_iv16;
 246 };
 247
 248 struct ieee80211_csa_settings {
 249         const u16 *counter_offsets_beacon;
 250         const u16 *counter_offsets_presp;
 251
 252         int n_counter_offsets_beacon;
 253         int n_counter_offsets_presp;
 254
 255         u8 count;
 256 };
 257
 258 struct beacon_data {
 259         u8 *head, *tail;
 260         int head_len, tail_len;
 261         struct ieee80211_meshconf_ie *meshconf;
 262         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 263         u8 csa_current_counter;
 264         struct rcu_head rcu_head;
 265 };
 266
 267 struct probe_resp {
 268         struct rcu_head rcu_head;
 269         int len;
 270         u16 csa_counter_offsets[IEEE80211_MAX_CSA_COUNTERS_NUM];
 271         u8 data[0];
 272 };
 273
 274 struct ps_data {
 275         /* yes, this looks ugly, but guarantees that we can later use
 276          * bitmap_empty :)
 277          * NB: don't touch this bitmap, use sta_info_{set,clear}_tim_bit */
 278         u8 tim[sizeof(unsigned long) * BITS_TO_LONGS(IEEE80211_MAX_AID + 1)]
 279                         __aligned(__alignof__(unsigned long));
 280         struct sk_buff_head bc_buf;
 281         atomic_t num_sta_ps; /* number of stations in PS mode */
 282         int dtim_count;
 283         bool dtim_bc_mc;
 284 };
 285
 286 struct ieee80211_if_ap {
 287         struct beacon_data __rcu *beacon;
 288         struct probe_resp __rcu *probe_resp;
 289
 290         /* to be used after channel switch. */
 291         struct cfg80211_beacon_data *next_beacon;
 292         struct list_head vlans; /* write-protected with RTNL and local->mtx */
 293
 294         struct ps_data ps;
 295         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 296         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 297                          driver_smps_mode; /* smps mode request */
 298
 299         struct work_struct request_smps_work;
 300 };
 301
 302 struct ieee80211_if_wds {
 303         struct sta_info *sta;
 304         u8 remote_addr[ETH_ALEN];
 305 };
 306
 307 struct ieee80211_if_vlan {
 308         struct list_head list; /* write-protected with RTNL and local->mtx */
 309
 310         /* used for all tx if the VLAN is configured to 4-addr mode */
 311         struct sta_info __rcu *sta;
 312         atomic_t num_mcast_sta; /* number of stations receiving multicast */
 313 };
 314
 315 struct mesh_stats {
 316         __u32 fwded_mcast;              /* Mesh forwarded multicast frames */
 317         __u32 fwded_unicast;            /* Mesh forwarded unicast frames */
 318         __u32 fwded_frames;             /* Mesh total forwarded frames */
 319         __u32 dropped_frames_ttl;       /* Not transmitted since mesh_ttl == 0*/
 320         __u32 dropped_frames_no_route;  /* Not transmitted, no route found */
 321         __u32 dropped_frames_congestion;/* Not forwarded due to congestion */
 322 };
 323
 324 #define PREQ_Q_F_START          0x1
 325 #define PREQ_Q_F_REFRESH        0x2
 326 struct mesh_preq_queue {
 327         struct list_head list;
 328         u8 dst[ETH_ALEN];
 329         u8 flags;
 330 };
 331
 332 struct ieee80211_roc_work {
 333         struct list_head list;
 334
 335         struct ieee80211_sub_if_data *sdata;
 336
 337         struct ieee80211_channel *chan;
 338
 339         bool started, abort, hw_begun, notified;
 340         bool on_channel;
 341
 342         unsigned long start_time;
 343
 344         u32 duration, req_duration;
 345         struct sk_buff *frame;
 346         u64 cookie, mgmt_tx_cookie;
 347         enum ieee80211_roc_type type;
 348 };
 349
 350 /* flags used in struct ieee80211_if_managed.flags */
 351 enum ieee80211_sta_flags {
 352         IEEE80211_STA_CONNECTION_POLL   = BIT(1),
 353         IEEE80211_STA_CONTROL_PORT      = BIT(2),
 354         IEEE80211_STA_DISABLE_HT        = BIT(4),
 355         IEEE80211_STA_MFP_ENABLED       = BIT(6),
 356         IEEE80211_STA_UAPSD_ENABLED     = BIT(7),
 357         IEEE80211_STA_NULLFUNC_ACKED    = BIT(8),
 358         IEEE80211_STA_RESET_SIGNAL_AVE  = BIT(9),
 359         IEEE80211_STA_DISABLE_40MHZ     = BIT(10),
 360         IEEE80211_STA_DISABLE_VHT       = BIT(11),
 361         IEEE80211_STA_DISABLE_80P80MHZ  = BIT(12),
 362         IEEE80211_STA_DISABLE_160MHZ    = BIT(13),
 363         IEEE80211_STA_DISABLE_WMM       = BIT(14),
 364         IEEE80211_STA_ENABLE_RRM        = BIT(15),
 365 };
 366
 367 struct ieee80211_mgd_auth_data {
 368         struct cfg80211_bss *bss;
 369         unsigned long timeout;
 370         int tries;
 371         u16 algorithm, expected_transaction;
 372
 373         u8 key[WLAN_KEY_LEN_WEP104];
 374         u8 key_len, key_idx;
 375         bool done;
 376         bool timeout_started;
 377
 378         u16 sae_trans, sae_status;
 379         size_t data_len;
 380         u8 data[];
 381 };
 382
 383 struct ieee80211_mgd_assoc_data {
 384         struct cfg80211_bss *bss;
 385         const u8 *supp_rates;
 386
 387         unsigned long timeout;
 388         int tries;
 389
 390         u16 capability;
 391         u8 prev_bssid[ETH_ALEN];
 392         u8 ssid[IEEE80211_MAX_SSID_LEN];
 393         u8 ssid_len;
 394         u8 supp_rates_len;
 395         bool wmm, uapsd;
 396         bool need_beacon;
 397         bool synced;
 398         bool timeout_started;
 399
 400         u8 ap_ht_param;
 401
 402         struct ieee80211_vht_cap ap_vht_cap;
 403
 404         u8 fils_nonces[2 * FILS_NONCE_LEN];
 405         u8 fils_kek[FILS_MAX_KEK_LEN];
 406         size_t fils_kek_len;
 407
 408         size_t ie_len;
 409         u8 ie[];
 410 };
 411
 412 struct ieee80211_sta_tx_tspec {
 413         /* timestamp of the first packet in the time slice */
 414         unsigned long time_slice_start;
 415
 416         u32 admitted_time; /* in usecs, unlike over the air */
 417         u8 tsid;
 418         s8 up; /* signed to be able to invalidate with -1 during teardown */
 419
 420         /* consumed TX time in microseconds in the time slice */
 421         u32 consumed_tx_time;
 422         enum {
 423                 TX_TSPEC_ACTION_NONE = 0,
 424                 TX_TSPEC_ACTION_DOWNGRADE,
 425                 TX_TSPEC_ACTION_STOP_DOWNGRADE,
 426         } action;
 427         bool downgraded;
 428 };
 429
 430 DECLARE_EWMA(beacon_signal, 16, 4)
 431
 432 struct ieee80211_if_managed {
 433         struct timer_list timer;
 434         struct timer_list conn_mon_timer;
 435         struct timer_list bcn_mon_timer;
 436         struct timer_list chswitch_timer;
 437         struct work_struct monitor_work;
 438         struct work_struct chswitch_work;
 439         struct work_struct beacon_connection_loss_work;
 440         struct work_struct csa_connection_drop_work;
 441
 442         unsigned long beacon_timeout;
 443         unsigned long probe_timeout;
 444         int probe_send_count;
 445         bool nullfunc_failed;
 446         bool connection_loss;
 447
 448         struct cfg80211_bss *associated;
 449         struct ieee80211_mgd_auth_data *auth_data;
 450         struct ieee80211_mgd_assoc_data *assoc_data;
 451
 452         u8 bssid[ETH_ALEN] __aligned(2);
 453
 454         u16 aid;
 455
 456         bool powersave; /* powersave requested for this iface */
 457         bool broken_ap; /* AP is broken -- turn off powersave */
 458         bool have_beacon;
 459         u8 dtim_period;
 460         enum ieee80211_smps_mode req_smps, /* requested smps mode */
 461                                  driver_smps_mode; /* smps mode request */
 462
 463         struct work_struct request_smps_work;
 464
 465         unsigned int flags;
 466
 467         bool csa_waiting_bcn;
 468         bool csa_ignored_same_chan;
 469
 470         bool beacon_crc_valid;
 471         u32 beacon_crc;
 472
 473         bool status_acked;
 474         bool status_received;
 475         __le16 status_fc;
 476
 477         enum {
 478                 IEEE80211_MFP_DISABLED,
 479                 IEEE80211_MFP_OPTIONAL,
 480                 IEEE80211_MFP_REQUIRED
 481         } mfp; /* management frame protection */
 482
 483         /*
 484          * Bitmask of enabled u-apsd queues,
 485          * IEEE80211_WMM_IE_STA_QOSINFO_AC_BE & co. Needs a new association
 486          * to take effect.
 487          */
 488         unsigned int uapsd_queues;
 489
 490         /*
 491          * Maximum number of buffered frames AP can deliver during a
 492          * service period, IEEE80211_WMM_IE_STA_QOSINFO_SP_ALL or similar.
 493          * Needs a new association to take effect.
 494          */
 495         unsigned int uapsd_max_sp_len;
 496
 497         int wmm_last_param_set;
 498
 499         u8 use_4addr;
 500
 501         s16 p2p_noa_index;
 502
 503         struct ewma_beacon_signal ave_beacon_signal;
 504
 505         /*
 506          * Number of Beacon frames used in ave_beacon_signal. This can be used
 507          * to avoid generating less reliable cqm events that would be based
 508          * only on couple of received frames.
 509          */
 510         unsigned int count_beacon_signal;
 511
 512         /* Number of times beacon loss was invoked. */
 513         unsigned int beacon_loss_count;
 514
 515         /*
 516          * Last Beacon frame signal strength average (ave_beacon_signal / 16)
 517          * that triggered a cqm event. 0 indicates that no event has been
 518          * generated for the current association.
 519          */
 520         int last_cqm_event_signal;
 521
 522         /*
 523          * State variables for keeping track of RSSI of the AP currently
 524          * connected to and informing driver when RSSI has gone
 525          * below/above a certain threshold.
 526          */
 527         int rssi_min_thold, rssi_max_thold;
 528         int last_ave_beacon_signal;
 529
 530         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 531         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 532         struct ieee80211_vht_cap vht_capa; /* configured VHT overrides */
 533         struct ieee80211_vht_cap vht_capa_mask; /* Valid parts of vht_capa */
 534
 535         /* TDLS support */
 536         u8 tdls_peer[ETH_ALEN] __aligned(2);
 537         struct delayed_work tdls_peer_del_work;
 538         struct sk_buff *orig_teardown_skb; /* The original teardown skb */
 539         struct sk_buff *teardown_skb; /* A copy to send through the AP */
 540         spinlock_t teardown_lock; /* To lock changing teardown_skb */
 541         bool tdls_chan_switch_prohibited;
 542         bool tdls_wider_bw_prohibited;
 543
 544         /* WMM-AC TSPEC support */
 545         struct ieee80211_sta_tx_tspec tx_tspec[IEEE80211_NUM_ACS];
 546         /* Use a separate work struct so that we can do something here
 547          * while the sdata->work is flushing the queues, for example.
 548          * otherwise, in scenarios where we hardly get any traffic out
 549          * on the BE queue, but there's a lot of VO traffic, we might
 550          * get stuck in a downgraded situation and flush takes forever.
 551          */
 552         struct delayed_work tx_tspec_wk;
 553 };
 554
 555 struct ieee80211_if_ibss {
 556         struct timer_list timer;
 557         struct work_struct csa_connection_drop_work;
 558
 559         unsigned long last_scan_completed;
 560
 561         u32 basic_rates;
 562
 563         bool fixed_bssid;
 564         bool fixed_channel;
 565         bool privacy;
 566
 567         bool control_port;
 568         bool userspace_handles_dfs;
 569
 570         u8 bssid[ETH_ALEN] __aligned(2);
 571         u8 ssid[IEEE80211_MAX_SSID_LEN];
 572         u8 ssid_len, ie_len;
 573         u8 *ie;
 574         struct cfg80211_chan_def chandef;
 575
 576         unsigned long ibss_join_req;
 577         /* probe response/beacon for IBSS */
 578         struct beacon_data __rcu *presp;
 579
 580         struct ieee80211_ht_cap ht_capa; /* configured ht-cap over-rides */
 581         struct ieee80211_ht_cap ht_capa_mask; /* Valid parts of ht_capa */
 582
 583         spinlock_t incomplete_lock;
 584         struct list_head incomplete_stations;
 585
 586         enum {
 587                 IEEE80211_IBSS_MLME_SEARCH,
 588                 IEEE80211_IBSS_MLME_JOINED,
 589         } state;
 590 };
 591
 592 /**
 593  * struct ieee80211_if_ocb - OCB mode state
 594  *
 595  * @housekeeping_timer: timer for periodic invocation of a housekeeping task
 596  * @wrkq_flags: OCB deferred task action
 597  * @incomplete_lock: delayed STA insertion lock
 598  * @incomplete_stations: list of STAs waiting for delayed insertion
 599  * @joined: indication if the interface is connected to an OCB network
 600  */
 601 struct ieee80211_if_ocb {
 602         struct timer_list housekeeping_timer;
 603         unsigned long wrkq_flags;
 604
 605         spinlock_t incomplete_lock;
 606         struct list_head incomplete_stations;
 607
 608         bool joined;
 609 };
 610
 611 /**
 612  * struct ieee80211_mesh_sync_ops - Extensible synchronization framework interface
 613  *
 614  * these declarations define the interface, which enables
 615  * vendor-specific mesh synchronization
 616  *
 617  */
 618 struct ieee802_11_elems;
 619 struct ieee80211_mesh_sync_ops {
 620         void (*rx_bcn_presp)(struct ieee80211_sub_if_data *sdata,
 621                              u16 stype,
 622                              struct ieee80211_mgmt *mgmt,
 623                              struct ieee802_11_elems *elems,
 624                              struct ieee80211_rx_status *rx_status);
 625
 626         /* should be called with beacon_data under RCU read lock */
 627         void (*adjust_tbtt)(struct ieee80211_sub_if_data *sdata,
 628                             struct beacon_data *beacon);
 629         /* add other framework functions here */
 630 };
 631
 632 struct mesh_csa_settings {
 633         struct rcu_head rcu_head;
 634         struct cfg80211_csa_settings settings;
 635 };
 636
 637 struct ieee80211_if_mesh {
 638         struct timer_list housekeeping_timer;
 639         struct timer_list mesh_path_timer;
 640         struct timer_list mesh_path_root_timer;
 641
 642         unsigned long wrkq_flags;
 643         unsigned long mbss_changed;
 644
 645         u8 mesh_id[IEEE80211_MAX_MESH_ID_LEN];
 646         size_t mesh_id_len;
 647         /* Active Path Selection Protocol Identifier */
 648         u8 mesh_pp_id;
 649         /* Active Path Selection Metric Identifier */
 650         u8 mesh_pm_id;
 651         /* Congestion Control Mode Identifier */
 652         u8 mesh_cc_id;
 653         /* Synchronization Protocol Identifier */
 654         u8 mesh_sp_id;
 655         /* Authentication Protocol Identifier */
 656         u8 mesh_auth_id;
 657         /* Local mesh Sequence Number */
 658         u32 sn;
 659         /* Last used PREQ ID */
 660         u32 preq_id;
 661         atomic_t mpaths;
 662         /* Timestamp of last SN update */
 663         unsigned long last_sn_update;
 664         /* Time when it's ok to send next PERR */
 665         unsigned long next_perr;
 666         /* Timestamp of last PREQ sent */
 667         unsigned long last_preq;
 668         struct mesh_rmc *rmc;
 669         spinlock_t mesh_preq_queue_lock;
 670         struct mesh_preq_queue preq_queue;
 671         int preq_queue_len;
 672         struct mesh_stats mshstats;
 673         struct mesh_config mshcfg;
 674         atomic_t estab_plinks;
 675         u32 mesh_seqnum;
 676         bool accepting_plinks;
 677         int num_gates;
 678         struct beacon_data __rcu *beacon;
 679         const u8 *ie;
 680         u8 ie_len;
 681         enum {
 682                 IEEE80211_MESH_SEC_NONE = 0x0,
 683                 IEEE80211_MESH_SEC_AUTHED = 0x1,
 684                 IEEE80211_MESH_SEC_SECURED = 0x2,
 685         } security;
 686         bool user_mpm;
 687         /* Extensible Synchronization Framework */
 688         const struct ieee80211_mesh_sync_ops *sync_ops;
 689         s64 sync_offset_clockdrift_max;
 690         spinlock_t sync_offset_lock;
 691         bool adjusting_tbtt;
 692         /* mesh power save */
 693         enum nl80211_mesh_power_mode nonpeer_pm;
 694         int ps_peers_light_sleep;
 695         int ps_peers_deep_sleep;
 696         struct ps_data ps;
 697         /* Channel Switching Support */
 698         struct mesh_csa_settings __rcu *csa;
 699         enum {
 700                 IEEE80211_MESH_CSA_ROLE_NONE,
 701                 IEEE80211_MESH_CSA_ROLE_INIT,
 702                 IEEE80211_MESH_CSA_ROLE_REPEATER,
 703         } csa_role;
 704         u8 chsw_ttl;
 705         u16 pre_value;
 706
 707         /* offset from skb->data while building IE */
 708         int meshconf_offset;
 709
 710         struct mesh_table *mesh_paths;
 711         struct mesh_table *mpp_paths; /* Store paths for MPP&MAP */
 712         int mesh_paths_generation;
 713         int mpp_paths_generation;
 714 };
 715
 716 #ifdef CONFIG_MAC80211_MESH
 717 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 718         do { (msh)->mshstats.name++; } while (0)
 719 #else
 720 #define IEEE80211_IFSTA_MESH_CTR_INC(msh, name) \
 721         do { } while (0)
 722 #endif
 723
 724 /**
 725  * enum ieee80211_sub_if_data_flags - virtual interface flags
 726  *
 727  * @IEEE80211_SDATA_ALLMULTI: interface wants all multicast packets
 728  * @IEEE80211_SDATA_OPERATING_GMODE: operating in G-only mode
 729  * @IEEE80211_SDATA_DONT_BRIDGE_PACKETS: bridge packets between
 730  *      associated stations and deliver multicast frames both
 731  *      back to wireless media and to the local net stack.
 732  * @IEEE80211_SDATA_DISCONNECT_RESUME: Disconnect after resume.
 733  * @IEEE80211_SDATA_IN_DRIVER: indicates interface was added to driver
 734  */
 735 enum ieee80211_sub_if_data_flags {
 736         IEEE80211_SDATA_ALLMULTI                = BIT(0),
 737         IEEE80211_SDATA_OPERATING_GMODE         = BIT(2),
 738         IEEE80211_SDATA_DONT_BRIDGE_PACKETS     = BIT(3),
 739         IEEE80211_SDATA_DISCONNECT_RESUME       = BIT(4),
 740         IEEE80211_SDATA_IN_DRIVER               = BIT(5),
 741 };
 742
 743 /**
 744  * enum ieee80211_sdata_state_bits - virtual interface state bits
 745  * @SDATA_STATE_RUNNING: virtual interface is up & running; this
 746  *      mirrors netif_running() but is separate for interface type
 747  *      change handling while the interface is up
 748  * @SDATA_STATE_OFFCHANNEL: This interface is currently in offchannel
 749  *      mode, so queues are stopped
 750  * @SDATA_STATE_OFFCHANNEL_BEACON_STOPPED: Beaconing was stopped due
 751  *      to offchannel, reset when offchannel returns
 752  */
 753 enum ieee80211_sdata_state_bits {
 754         SDATA_STATE_RUNNING,
 755         SDATA_STATE_OFFCHANNEL,
 756         SDATA_STATE_OFFCHANNEL_BEACON_STOPPED,
 757 };
 758
 759 /**
 760  * enum ieee80211_chanctx_mode - channel context configuration mode
 761  *
 762  * @IEEE80211_CHANCTX_SHARED: channel context may be used by
 763  *      multiple interfaces
 764  * @IEEE80211_CHANCTX_EXCLUSIVE: channel context can be used
 765  *      only by a single interface. This can be used for example for
 766  *      non-fixed channel IBSS.
 767  */
 768 enum ieee80211_chanctx_mode {
 769         IEEE80211_CHANCTX_SHARED,
 770         IEEE80211_CHANCTX_EXCLUSIVE
 771 };
 772
 773 /**
 774  * enum ieee80211_chanctx_replace_state - channel context replacement state
 775  *
 776  * This is used for channel context in-place reservations that require channel
 777  * context switch/swap.
 778  *
 779  * @IEEE80211_CHANCTX_REPLACE_NONE: no replacement is taking place
 780  * @IEEE80211_CHANCTX_WILL_BE_REPLACED: this channel context will be replaced
 781  *      by a (not yet registered) channel context pointed by %replace_ctx.
 782  * @IEEE80211_CHANCTX_REPLACES_OTHER: this (not yet registered) channel context
 783  *      replaces an existing channel context pointed to by %replace_ctx.
 784  */
 785 enum ieee80211_chanctx_replace_state {
 786         IEEE80211_CHANCTX_REPLACE_NONE,
 787         IEEE80211_CHANCTX_WILL_BE_REPLACED,
 788         IEEE80211_CHANCTX_REPLACES_OTHER,
 789 };
 790
 791 struct ieee80211_chanctx {
 792         struct list_head list;
 793         struct rcu_head rcu_head;
 794
 795         struct list_head assigned_vifs;
 796         struct list_head reserved_vifs;
 797
 798         enum ieee80211_chanctx_replace_state replace_state;
 799         struct ieee80211_chanctx *replace_ctx;
 800
 801         enum ieee80211_chanctx_mode mode;
 802         bool driver_present;
 803
 804         struct ieee80211_chanctx_conf conf;
 805 };
 806
 807 struct mac80211_qos_map {
 808         struct cfg80211_qos_map qos_map;
 809         struct rcu_head rcu_head;
 810 };
 811
 812 enum txq_info_flags {
 813         IEEE80211_TXQ_STOP,
 814         IEEE80211_TXQ_AMPDU,
 815         IEEE80211_TXQ_NO_AMSDU,
 816 };
 817
 818 /**
 819  * struct txq_info - per tid queue
 820  *
 821  * @tin: contains packets split into multiple flows
 822  * @def_flow: used as a fallback flow when a packet destined to @tin hashes to
 823  *      a fq_flow which is already owned by a different tin
 824  * @def_cvars: codel vars for @def_flow
 825  * @frags: used to keep fragments created after dequeue
 826  */
 827 struct txq_info {
 828         struct fq_tin tin;
 829         struct fq_flow def_flow;
 830         struct codel_vars def_cvars;
 831         struct codel_stats cstats;
 832         struct sk_buff_head frags;
 833         unsigned long flags;
 834
 835         /* keep last! */
 836         struct ieee80211_txq txq;
 837 };
 838
 839 struct ieee80211_if_mntr {
 840         u32 flags;
 841         u8 mu_follow_addr[ETH_ALEN] __aligned(2);
 842 };
 843
 844 /**
 845  * struct ieee80211_if_nan - NAN state
 846  *
 847  * @conf: current NAN configuration
 848  * @func_ids: a bitmap of available instance_id's
 849  */
 850 struct ieee80211_if_nan {
 851         struct cfg80211_nan_conf conf;
 852
 853         /* protects function_inst_ids */
 854         spinlock_t func_lock;
 855         struct idr function_inst_ids;
 856 };
 857
 858 struct ieee80211_sub_if_data {
 859         struct list_head list;
 860
 861         struct wireless_dev wdev;
 862
 863         /* keys */
 864         struct list_head key_list;
 865
 866         /* count for keys needing tailroom space allocation */
 867         int crypto_tx_tailroom_needed_cnt;
 868         int crypto_tx_tailroom_pending_dec;
 869         struct delayed_work dec_tailroom_needed_wk;
 870
 871         struct net_device *dev;
 872         struct ieee80211_local *local;
 873
 874         unsigned int flags;
 875
 876         unsigned long state;
 877
 878         char name[IFNAMSIZ];
 879
 880         /* Fragment table for host-based reassembly */
 881         struct ieee80211_fragment_entry fragments[IEEE80211_FRAGMENT_MAX];
 882         unsigned int fragment_next;
 883
 884         /* TID bitmap for NoAck policy */
 885         u16 noack_map;
 886
 887         /* bit field of ACM bits (BIT(802.1D tag)) */
 888         u8 wmm_acm;
 889
 890         struct ieee80211_key __rcu *keys[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
 891         struct ieee80211_key __rcu *default_unicast_key;
 892         struct ieee80211_key __rcu *default_multicast_key;
 893         struct ieee80211_key __rcu *default_mgmt_key;
 894
 895         u16 sequence_number;
 896         __be16 control_port_protocol;
 897         bool control_port_no_encrypt;
 898         int encrypt_headroom;
 899
 900         atomic_t num_tx_queued;
 901         struct ieee80211_tx_queue_params tx_conf[IEEE80211_NUM_ACS];
 902         struct mac80211_qos_map __rcu *qos_map;
 903
 904         struct work_struct csa_finalize_work;
 905         bool csa_block_tx; /* write-protected by sdata_lock and local->mtx */
 906         struct cfg80211_chan_def csa_chandef;
 907
 908         struct list_head assigned_chanctx_list; /* protected by chanctx_mtx */
 909         struct list_head reserved_chanctx_list; /* protected by chanctx_mtx */
 910
 911         /* context reservation -- protected with chanctx_mtx */
 912         struct ieee80211_chanctx *reserved_chanctx;
 913         struct cfg80211_chan_def reserved_chandef;
 914         bool reserved_radar_required;
 915         bool reserved_ready;
 916
 917         /* used to reconfigure hardware SM PS */
 918         struct work_struct recalc_smps;
 919
 920         struct work_struct work;
 921         struct sk_buff_head skb_queue;
 922
 923         u8 needed_rx_chains;
 924         enum ieee80211_smps_mode smps_mode;
 925
 926         int user_power_level; /* in dBm */
 927         int ap_power_level; /* in dBm */
 928
 929         bool radar_required;
 930         struct delayed_work dfs_cac_timer_work;
 931
 932         /*
 933          * AP this belongs to: self in AP mode and
 934          * corresponding AP in VLAN mode, NULL for
 935          * all others (might be needed later in IBSS)
 936          */
 937         struct ieee80211_if_ap *bss;
 938
 939         /* bitmap of allowed (non-MCS) rate indexes for rate control */
 940         u32 rc_rateidx_mask[NUM_NL80211_BANDS];
 941
 942         bool rc_has_mcs_mask[NUM_NL80211_BANDS];
 943         u8  rc_rateidx_mcs_mask[NUM_NL80211_BANDS][IEEE80211_HT_MCS_MASK_LEN];
 944
 945         bool rc_has_vht_mcs_mask[NUM_NL80211_BANDS];
 946         u16 rc_rateidx_vht_mcs_mask[NUM_NL80211_BANDS][NL80211_VHT_NSS_MAX];
 947
 948         union {
 949                 struct ieee80211_if_ap ap;
 950                 struct ieee80211_if_wds wds;
 951                 struct ieee80211_if_vlan vlan;
 952                 struct ieee80211_if_managed mgd;
 953                 struct ieee80211_if_ibss ibss;
 954                 struct ieee80211_if_mesh mesh;
 955                 struct ieee80211_if_ocb ocb;
 956                 struct ieee80211_if_mntr mntr;
 957                 struct ieee80211_if_nan nan;
 958         } u;
 959
 960 #ifdef CONFIG_MAC80211_DEBUGFS
 961         struct {
 962                 struct dentry *subdir_stations;
 963                 struct dentry *default_unicast_key;
 964                 struct dentry *default_multicast_key;
 965                 struct dentry *default_mgmt_key;
 966         } debugfs;
 967 #endif
 968
 969         /* must be last, dynamically sized area in this! */
 970         struct ieee80211_vif vif;
 971 };
 972
 973 static inline
 974 struct ieee80211_sub_if_data *vif_to_sdata(struct ieee80211_vif *p)
 975 {
 976         return container_of(p, struct ieee80211_sub_if_data, vif);
 977 }
 978
 979 static inline void sdata_lock(struct ieee80211_sub_if_data *sdata)
 980         __acquires(&sdata->wdev.mtx)
 981 {
 982         mutex_lock(&sdata->wdev.mtx);
 983         __acquire(&sdata->wdev.mtx);
 984 }
 985
 986 static inline void sdata_unlock(struct ieee80211_sub_if_data *sdata)
 987         __releases(&sdata->wdev.mtx)
 988 {
 989         mutex_unlock(&sdata->wdev.mtx);
 990         __release(&sdata->wdev.mtx);
 991 }
 992
 993 #define sdata_dereference(p, sdata) \
 994         rcu_dereference_protected(p, lockdep_is_held(&sdata->wdev.mtx))
 995
 996 static inline void
 997 sdata_assert_lock(struct ieee80211_sub_if_data *sdata)
 998 {
 999         lockdep_assert_held(&sdata->wdev.mtx);
1000 }
1001
1002 static inline enum nl80211_band
1003 ieee80211_get_sdata_band(struct ieee80211_sub_if_data *sdata)
1004 {
1005         enum nl80211_band band = NL80211_BAND_2GHZ;
1006         struct ieee80211_chanctx_conf *chanctx_conf;
1007
1008         rcu_read_lock();
1009         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1010         if (!WARN_ON(!chanctx_conf))
1011                 band = chanctx_conf->def.chan->band;
1012         rcu_read_unlock();
1013
1014         return band;
1015 }
1016
1017 static inline int
1018 ieee80211_chandef_get_shift(struct cfg80211_chan_def *chandef)
1019 {
1020         switch (chandef->width) {
1021         case NL80211_CHAN_WIDTH_5:
1022                 return 2;
1023         case NL80211_CHAN_WIDTH_10:
1024                 return 1;
1025         default:
1026                 return 0;
1027         }
1028 }
1029
1030 static inline int
1031 ieee80211_vif_get_shift(struct ieee80211_vif *vif)
1032 {
1033         struct ieee80211_chanctx_conf *chanctx_conf;
1034         int shift = 0;
1035
1036         rcu_read_lock();
1037         chanctx_conf = rcu_dereference(vif->chanctx_conf);
1038         if (chanctx_conf)
1039                 shift = ieee80211_chandef_get_shift(&chanctx_conf->def);
1040         rcu_read_unlock();
1041
1042         return shift;
1043 }
1044
1045 struct ieee80211_rx_agg {
1046         u8 addr[ETH_ALEN];
1047         u16 tid;
1048 };
1049
1050 enum sdata_queue_type {
1051         IEEE80211_SDATA_QUEUE_TYPE_FRAME        = 0,
1052         IEEE80211_SDATA_QUEUE_AGG_START         = 1,
1053         IEEE80211_SDATA_QUEUE_AGG_STOP          = 2,
1054         IEEE80211_SDATA_QUEUE_RX_AGG_START      = 3,
1055         IEEE80211_SDATA_QUEUE_RX_AGG_STOP       = 4,
1056 };
1057
1058 enum {
1059         IEEE80211_RX_MSG        = 1,
1060         IEEE80211_TX_STATUS_MSG = 2,
1061 };
1062
1063 enum queue_stop_reason {
1064         IEEE80211_QUEUE_STOP_REASON_DRIVER,
1065         IEEE80211_QUEUE_STOP_REASON_PS,
1066         IEEE80211_QUEUE_STOP_REASON_CSA,
1067         IEEE80211_QUEUE_STOP_REASON_AGGREGATION,
1068         IEEE80211_QUEUE_STOP_REASON_SUSPEND,
1069         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
1070         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
1071         IEEE80211_QUEUE_STOP_REASON_FLUSH,
1072         IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN,
1073         IEEE80211_QUEUE_STOP_REASON_RESERVE_TID,
1074
1075         IEEE80211_QUEUE_STOP_REASONS,
1076 };
1077
1078 #ifdef CONFIG_MAC80211_LEDS
1079 struct tpt_led_trigger {
1080         char name[32];
1081         const struct ieee80211_tpt_blink *blink_table;
1082         unsigned int blink_table_len;
1083         struct timer_list timer;
1084         unsigned long prev_traffic;
1085         unsigned long tx_bytes, rx_bytes;
1086         unsigned int active, want;
1087         bool running;
1088 };
1089 #endif
1090
1091 /**
1092  * mac80211 scan flags - currently active scan mode
1093  *
1094  * @SCAN_SW_SCANNING: We're currently in the process of scanning but may as
1095  *      well be on the operating channel
1096  * @SCAN_HW_SCANNING: The hardware is scanning for us, we have no way to
1097  *      determine if we are on the operating channel or not
1098  * @SCAN_ONCHANNEL_SCANNING:  Do a software scan on only the current operating
1099  *      channel. This should not interrupt normal traffic.
1100  * @SCAN_COMPLETED: Set for our scan work function when the driver reported
1101  *      that the scan completed.
1102  * @SCAN_ABORTED: Set for our scan work function when the driver reported
1103  *      a scan complete for an aborted scan.
1104  * @SCAN_HW_CANCELLED: Set for our scan work function when the scan is being
1105  *      cancelled.
1106  */
1107 enum {
1108         SCAN_SW_SCANNING,
1109         SCAN_HW_SCANNING,
1110         SCAN_ONCHANNEL_SCANNING,
1111         SCAN_COMPLETED,
1112         SCAN_ABORTED,
1113         SCAN_HW_CANCELLED,
1114 };
1115
1116 /**
1117  * enum mac80211_scan_state - scan state machine states
1118  *
1119  * @SCAN_DECISION: Main entry point to the scan state machine, this state
1120  *      determines if we should keep on scanning or switch back to the
1121  *      operating channel
1122  * @SCAN_SET_CHANNEL: Set the next channel to be scanned
1123  * @SCAN_SEND_PROBE: Send probe requests and wait for probe responses
1124  * @SCAN_SUSPEND: Suspend the scan and go back to operating channel to
1125  *      send out data
1126  * @SCAN_RESUME: Resume the scan and scan the next channel
1127  * @SCAN_ABORT: Abort the scan and go back to operating channel
1128  */
1129 enum mac80211_scan_state {
1130         SCAN_DECISION,
1131         SCAN_SET_CHANNEL,
1132         SCAN_SEND_PROBE,
1133         SCAN_SUSPEND,
1134         SCAN_RESUME,
1135         SCAN_ABORT,
1136 };
1137
1138 struct ieee80211_local {
1139         /* embed the driver visible part.
1140          * don't cast (use the static inlines below), but we keep
1141          * it first anyway so they become a no-op */
1142         struct ieee80211_hw hw;
1143
1144         struct fq fq;
1145         struct codel_vars *cvars;
1146         struct codel_params cparams;
1147
1148         const struct ieee80211_ops *ops;
1149
1150         /*
1151          * private workqueue to mac80211. mac80211 makes this accessible
1152          * via ieee80211_queue_work()
1153          */
1154         struct workqueue_struct *workqueue;
1155
1156         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
1157         int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
1158         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
1159         spinlock_t queue_stop_reason_lock;
1160
1161         int open_count;
1162         int monitors, cooked_mntrs;
1163         /* number of interfaces with corresponding FIF_ flags */
1164         int fif_fcsfail, fif_plcpfail, fif_control, fif_other_bss, fif_pspoll,
1165             fif_probe_req;
1166         int probe_req_reg;
1167         unsigned int filter_flags; /* FIF_* */
1168
1169         bool wiphy_ciphers_allocated;
1170
1171         bool use_chanctx;
1172
1173         /* protects the aggregated multicast list and filter calls */
1174         spinlock_t filter_lock;
1175
1176         /* used for uploading changed mc list */
1177         struct work_struct reconfig_filter;
1178
1179         /* aggregated multicast list */
1180         struct netdev_hw_addr_list mc_list;
1181
1182         bool tim_in_locked_section; /* see ieee80211_beacon_get() */
1183
1184         /*
1185          * suspended is true if we finished all the suspend _and_ we have
1186          * not yet come up from resume. This is to be used by mac80211
1187          * to ensure driver sanity during suspend and mac80211's own
1188          * sanity. It can eventually be used for WoW as well.
1189          */
1190         bool suspended;
1191
1192         /*
1193          * Resuming is true while suspended, but when we're reprogramming the
1194          * hardware -- at that time it's allowed to use ieee80211_queue_work()
1195          * again even though some other parts of the stack are still suspended
1196          * and we still drop received frames to avoid waking the stack.
1197          */
1198         bool resuming;
1199
1200         /*
1201          * quiescing is true during the suspend process _only_ to
1202          * ease timer cancelling etc.
1203          */
1204         bool quiescing;
1205
1206         /* device is started */
1207         bool started;
1208
1209         /* device is during a HW reconfig */
1210         bool in_reconfig;
1211
1212         /* wowlan is enabled -- don't reconfig on resume */
1213         bool wowlan;
1214
1215         struct work_struct radar_detected_work;
1216
1217         /* number of RX chains the hardware has */
1218         u8 rx_chains;
1219
1220         int tx_headroom; /* required headroom for hardware/radiotap */
1221
1222         /* Tasklet and skb queue to process calls from IRQ mode. All frames
1223          * added to skb_queue will be processed, but frames in
1224          * skb_queue_unreliable may be dropped if the total length of these
1225          * queues increases over the limit. */
1226 #define IEEE80211_IRQSAFE_QUEUE_LIMIT 128
1227         struct tasklet_struct tasklet;
1228         struct sk_buff_head skb_queue;
1229         struct sk_buff_head skb_queue_unreliable;
1230
1231         spinlock_t rx_path_lock;
1232
1233         /* Station data */
1234         /*
1235          * The mutex only protects the list, hash table and
1236          * counter, reads are done with RCU.
1237          */
1238         struct mutex sta_mtx;
1239         spinlock_t tim_lock;
1240         unsigned long num_sta;
1241         struct list_head sta_list;
1242         struct rhltable sta_hash;
1243         struct timer_list sta_cleanup;
1244         int sta_generation;
1245
1246         struct sk_buff_head pending[IEEE80211_MAX_QUEUES];
1247         struct tasklet_struct tx_pending_tasklet;
1248
1249         atomic_t agg_queue_stop[IEEE80211_MAX_QUEUES];
1250
1251         /* number of interfaces with allmulti RX */
1252         atomic_t iff_allmultis;
1253
1254         struct rate_control_ref *rate_ctrl;
1255
1256         struct crypto_cipher *wep_tx_tfm;
1257         struct crypto_cipher *wep_rx_tfm;
1258         u32 wep_iv;
1259
1260         /* see iface.c */
1261         struct list_head interfaces;
1262         struct mutex iflist_mtx;
1263
1264         /*
1265          * Key mutex, protects sdata's key_list and sta_info's
1266          * key pointers (write access, they're RCU.)
1267          */
1268         struct mutex key_mtx;
1269
1270         /* mutex for scan and work locking */
1271         struct mutex mtx;
1272
1273         /* Scanning and BSS list */
1274         unsigned long scanning;
1275         struct cfg80211_ssid scan_ssid;
1276         struct cfg80211_scan_request *int_scan_req;
1277         struct cfg80211_scan_request __rcu *scan_req;
1278         struct ieee80211_scan_request *hw_scan_req;
1279         struct cfg80211_chan_def scan_chandef;
1280         enum nl80211_band hw_scan_band;
1281         int scan_channel_idx;
1282         int scan_ies_len;
1283         int hw_scan_ies_bufsize;
1284         struct cfg80211_scan_info scan_info;
1285
1286         struct work_struct sched_scan_stopped_work;
1287         struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
1288         struct cfg80211_sched_scan_request __rcu *sched_scan_req;
1289         u8 scan_addr[ETH_ALEN];
1290
1291         unsigned long leave_oper_channel_time;
1292         enum mac80211_scan_state next_scan_state;
1293         struct delayed_work scan_work;
1294         struct ieee80211_sub_if_data __rcu *scan_sdata;
1295         /* For backward compatibility only -- do not use */
1296         struct cfg80211_chan_def _oper_chandef;
1297
1298         /* Temporary remain-on-channel for off-channel operations */
1299         struct ieee80211_channel *tmp_channel;
1300
1301         /* channel contexts */
1302         struct list_head chanctx_list;
1303         struct mutex chanctx_mtx;
1304
1305 #ifdef CONFIG_MAC80211_LEDS
1306         struct led_trigger tx_led, rx_led, assoc_led, radio_led;
1307         struct led_trigger tpt_led;
1308         atomic_t tx_led_active, rx_led_active, assoc_led_active;
1309         atomic_t radio_led_active, tpt_led_active;
1310         struct tpt_led_trigger *tpt_led_trigger;
1311 #endif
1312
1313 #ifdef CONFIG_MAC80211_DEBUG_COUNTERS
1314         /* SNMP counters */
1315         /* dot11CountersTable */
1316         u32 dot11TransmittedFragmentCount;
1317         u32 dot11MulticastTransmittedFrameCount;
1318         u32 dot11FailedCount;
1319         u32 dot11RetryCount;
1320         u32 dot11MultipleRetryCount;
1321         u32 dot11FrameDuplicateCount;
1322         u32 dot11ReceivedFragmentCount;
1323         u32 dot11MulticastReceivedFrameCount;
1324         u32 dot11TransmittedFrameCount;
1325
1326         /* TX/RX handler statistics */
1327         unsigned int tx_handlers_drop;
1328         unsigned int tx_handlers_queued;
1329         unsigned int tx_handlers_drop_wep;
1330         unsigned int tx_handlers_drop_not_assoc;
1331         unsigned int tx_handlers_drop_unauth_port;
1332         unsigned int rx_handlers_drop;
1333         unsigned int rx_handlers_queued;
1334         unsigned int rx_handlers_drop_nullfunc;
1335         unsigned int rx_handlers_drop_defrag;
1336         unsigned int tx_expand_skb_head;
1337         unsigned int tx_expand_skb_head_cloned;
1338         unsigned int rx_expand_skb_head_defrag;
1339         unsigned int rx_handlers_fragments;
1340         unsigned int tx_status_drop;
1341 #define I802_DEBUG_INC(c) (c)++
1342 #else /* CONFIG_MAC80211_DEBUG_COUNTERS */
1343 #define I802_DEBUG_INC(c) do { } while (0)
1344 #endif /* CONFIG_MAC80211_DEBUG_COUNTERS */
1345
1346
1347         int total_ps_buffered; /* total number of all buffered unicast and
1348                                 * multicast packets for power saving stations
1349                                 */
1350
1351         bool pspolling;
1352         bool offchannel_ps_enabled;
1353         /*
1354          * PS can only be enabled when we have exactly one managed
1355          * interface (and monitors) in PS, this then points there.
1356          */
1357         struct ieee80211_sub_if_data *ps_sdata;
1358         struct work_struct dynamic_ps_enable_work;
1359         struct work_struct dynamic_ps_disable_work;
1360         struct timer_list dynamic_ps_timer;
1361         struct notifier_block ifa_notifier;
1362         struct notifier_block ifa6_notifier;
1363
1364         /*
1365          * The dynamic ps timeout configured from user space via WEXT -
1366          * this will override whatever chosen by mac80211 internally.
1367          */
1368         int dynamic_ps_forced_timeout;
1369
1370         int user_power_level; /* in dBm, for all interfaces */
1371
1372         enum ieee80211_smps_mode smps_mode;
1373
1374         struct work_struct restart_work;
1375
1376 #ifdef CONFIG_MAC80211_DEBUGFS
1377         struct local_debugfsdentries {
1378                 struct dentry *rcdir;
1379                 struct dentry *keys;
1380         } debugfs;
1381 #endif
1382
1383         /*
1384          * Remain-on-channel support
1385          */
1386         struct delayed_work roc_work;
1387         struct list_head roc_list;
1388         struct work_struct hw_roc_start, hw_roc_done;
1389         unsigned long hw_roc_start_time;
1390         u64 roc_cookie_counter;
1391
1392         struct idr ack_status_frames;
1393         spinlock_t ack_status_lock;
1394
1395         struct ieee80211_sub_if_data __rcu *p2p_sdata;
1396
1397         /* virtual monitor interface */
1398         struct ieee80211_sub_if_data __rcu *monitor_sdata;
1399         struct cfg80211_chan_def monitor_chandef;
1400
1401         /* extended capabilities provided by mac80211 */
1402         u8 ext_capa[8];
1403
1404         /* TDLS channel switch */
1405         struct work_struct tdls_chsw_work;
1406         struct sk_buff_head skb_queue_tdls_chsw;
1407 };
1408
1409 static inline struct ieee80211_sub_if_data *
1410 IEEE80211_DEV_TO_SUB_IF(struct net_device *dev)
1411 {
1412         return netdev_priv(dev);
1413 }
1414
1415 static inline struct ieee80211_sub_if_data *
1416 IEEE80211_WDEV_TO_SUB_IF(struct wireless_dev *wdev)
1417 {
1418         return container_of(wdev, struct ieee80211_sub_if_data, wdev);
1419 }
1420
1421 /* this struct represents 802.11n's RA/TID combination */
1422 struct ieee80211_ra_tid {
1423         u8 ra[ETH_ALEN];
1424         u16 tid;
1425 };
1426
1427 /* this struct holds the value parsing from channel switch IE  */
1428 struct ieee80211_csa_ie {
1429         struct cfg80211_chan_def chandef;
1430         u8 mode;
1431         u8 count;
1432         u8 ttl;
1433         u16 pre_value;
1434 };
1435
1436 /* Parsed Information Elements */
1437 struct ieee802_11_elems {
1438         const u8 *ie_start;
1439         size_t total_len;
1440
1441         /* pointers to IEs */
1442         const struct ieee80211_tdls_lnkie *lnk_id;
1443         const struct ieee80211_ch_switch_timing *ch_sw_timing;
1444         const u8 *ext_capab;
1445         const u8 *ssid;
1446         const u8 *supp_rates;
1447         const u8 *ds_params;
1448         const struct ieee80211_tim_ie *tim;
1449         const u8 *challenge;
1450         const u8 *rsn;
1451         const u8 *erp_info;
1452         const u8 *ext_supp_rates;
1453         const u8 *wmm_info;
1454         const u8 *wmm_param;
1455         const struct ieee80211_ht_cap *ht_cap_elem;
1456         const struct ieee80211_ht_operation *ht_operation;
1457         const struct ieee80211_vht_cap *vht_cap_elem;
1458         const struct ieee80211_vht_operation *vht_operation;
1459         const struct ieee80211_meshconf_ie *mesh_config;
1460         const u8 *mesh_id;
1461         const u8 *peering;
1462         const __le16 *awake_window;
1463         const u8 *preq;
1464         const u8 *prep;
1465         const u8 *perr;
1466         const struct ieee80211_rann_ie *rann;
1467         const struct ieee80211_channel_sw_ie *ch_switch_ie;
1468         const struct ieee80211_ext_chansw_ie *ext_chansw_ie;
1469         const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1470         const u8 *country_elem;
1471         const u8 *pwr_constr_elem;
1472         const u8 *cisco_dtpc_elem;
1473         const struct ieee80211_timeout_interval_ie *timeout_int;
1474         const u8 *opmode_notif;
1475         const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1476         const struct ieee80211_mesh_chansw_params_ie *mesh_chansw_params_ie;
1477
1478         /* length of them, respectively */
1479         u8 ext_capab_len;
1480         u8 ssid_len;
1481         u8 supp_rates_len;
1482         u8 tim_len;
1483         u8 challenge_len;
1484         u8 rsn_len;
1485         u8 ext_supp_rates_len;
1486         u8 wmm_info_len;
1487         u8 wmm_param_len;
1488         u8 mesh_id_len;
1489         u8 peering_len;
1490         u8 preq_len;
1491         u8 prep_len;
1492         u8 perr_len;
1493         u8 country_elem_len;
1494
1495         /* whether a parse error occurred while retrieving these elements */
1496         bool parse_error;
1497 };
1498
1499 static inline struct ieee80211_local *hw_to_local(
1500         struct ieee80211_hw *hw)
1501 {
1502         return container_of(hw, struct ieee80211_local, hw);
1503 }
1504
1505 static inline struct txq_info *to_txq_info(struct ieee80211_txq *txq)
1506 {
1507         return container_of(txq, struct txq_info, txq);
1508 }
1509
1510 static inline bool txq_has_queue(struct ieee80211_txq *txq)
1511 {
1512         struct txq_info *txqi = to_txq_info(txq);
1513
1514         return !(skb_queue_empty(&txqi->frags) && !txqi->tin.backlog_packets);
1515 }
1516
1517 static inline int ieee80211_bssid_match(const u8 *raddr, const u8 *addr)
1518 {
1519         return ether_addr_equal(raddr, addr) ||
1520                is_broadcast_ether_addr(raddr);
1521 }
1522
1523 static inline bool
1524 ieee80211_have_rx_timestamp(struct ieee80211_rx_status *status)
1525 {
1526         WARN_ON_ONCE(status->flag & RX_FLAG_MACTIME_START &&
1527                      status->flag & RX_FLAG_MACTIME_END);
1528         if (status->flag & (RX_FLAG_MACTIME_START | RX_FLAG_MACTIME_END))
1529                 return true;
1530         /* can't handle HT/VHT preamble yet */
1531         if (status->flag & RX_FLAG_MACTIME_PLCP_START &&
1532             !(status->flag & (RX_FLAG_HT | RX_FLAG_VHT)))
1533                 return true;
1534         return false;
1535 }
1536
1537 void ieee80211_vif_inc_num_mcast(struct ieee80211_sub_if_data *sdata);
1538 void ieee80211_vif_dec_num_mcast(struct ieee80211_sub_if_data *sdata);
1539
1540 /* This function returns the number of multicast stations connected to this
1541  * interface. It returns -1 if that number is not tracked, that is for netdevs
1542  * not in AP or AP_VLAN mode or when using 4addr.
1543  */
1544 static inline int
1545 ieee80211_vif_get_num_mcast_if(struct ieee80211_sub_if_data *sdata)
1546 {
1547         if (sdata->vif.type == NL80211_IFTYPE_AP)
1548                 return atomic_read(&sdata->u.ap.num_mcast_sta);
1549         if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && !sdata->u.vlan.sta)
1550                 return atomic_read(&sdata->u.vlan.num_mcast_sta);
1551         return -1;
1552 }
1553
1554 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
1555                                      struct ieee80211_rx_status *status,
1556                                      unsigned int mpdu_len,
1557                                      unsigned int mpdu_offset);
1558 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed);
1559 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx);
1560 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata,
1561                                       u32 changed);
1562 void ieee80211_configure_filter(struct ieee80211_local *local);
1563 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata);
1564
1565 u64 ieee80211_mgmt_tx_cookie(struct ieee80211_local *local);
1566 int ieee80211_attach_ack_skb(struct ieee80211_local *local, struct sk_buff *skb,
1567                              u64 *cookie, gfp_t gfp);
1568
1569 void ieee80211_check_fast_rx(struct sta_info *sta);
1570 void __ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1571 void ieee80211_check_fast_rx_iface(struct ieee80211_sub_if_data *sdata);
1572 void ieee80211_clear_fast_rx(struct sta_info *sta);
1573
1574 /* STA code */
1575 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata);
1576 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
1577                        struct cfg80211_auth_request *req);
1578 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
1579                         struct cfg80211_assoc_request *req);
1580 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
1581                          struct cfg80211_deauth_request *req);
1582 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
1583                            struct cfg80211_disassoc_request *req);
1584 void ieee80211_send_pspoll(struct ieee80211_local *local,
1585                            struct ieee80211_sub_if_data *sdata);
1586 void ieee80211_recalc_ps(struct ieee80211_local *local);
1587 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata);
1588 int ieee80211_set_arp_filter(struct ieee80211_sub_if_data *sdata);
1589 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata);
1590 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1591                                   struct sk_buff *skb);
1592 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata);
1593 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata);
1594 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata);
1595 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
1596                                   __le16 fc, bool acked);
1597 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata);
1598 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata);
1599 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata);
1600
1601 /* IBSS code */
1602 void ieee80211_ibss_notify_scan_completed(struct ieee80211_local *local);
1603 void ieee80211_ibss_setup_sdata(struct ieee80211_sub_if_data *sdata);
1604 void ieee80211_ibss_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1605                               const u8 *bssid, const u8 *addr, u32 supp_rates);
1606 int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
1607                         struct cfg80211_ibss_params *params);
1608 int ieee80211_ibss_leave(struct ieee80211_sub_if_data *sdata);
1609 void ieee80211_ibss_work(struct ieee80211_sub_if_data *sdata);
1610 void ieee80211_ibss_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1611                                    struct sk_buff *skb);
1612 int ieee80211_ibss_csa_beacon(struct ieee80211_sub_if_data *sdata,
1613                               struct cfg80211_csa_settings *csa_settings);
1614 int ieee80211_ibss_finish_csa(struct ieee80211_sub_if_data *sdata);
1615 void ieee80211_ibss_stop(struct ieee80211_sub_if_data *sdata);
1616
1617 /* OCB code */
1618 void ieee80211_ocb_work(struct ieee80211_sub_if_data *sdata);
1619 void ieee80211_ocb_rx_no_sta(struct ieee80211_sub_if_data *sdata,
1620                              const u8 *bssid, const u8 *addr, u32 supp_rates);
1621 void ieee80211_ocb_setup_sdata(struct ieee80211_sub_if_data *sdata);
1622 int ieee80211_ocb_join(struct ieee80211_sub_if_data *sdata,
1623                        struct ocb_setup *setup);
1624 int ieee80211_ocb_leave(struct ieee80211_sub_if_data *sdata);
1625
1626 /* mesh code */
1627 void ieee80211_mesh_work(struct ieee80211_sub_if_data *sdata);
1628 void ieee80211_mesh_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
1629                                    struct sk_buff *skb);
1630 int ieee80211_mesh_csa_beacon(struct ieee80211_sub_if_data *sdata,
1631                               struct cfg80211_csa_settings *csa_settings);
1632 int ieee80211_mesh_finish_csa(struct ieee80211_sub_if_data *sdata);
1633
1634 /* scan/BSS handling */
1635 void ieee80211_scan_work(struct work_struct *work);
1636 int ieee80211_request_ibss_scan(struct ieee80211_sub_if_data *sdata,
1637                                 const u8 *ssid, u8 ssid_len,
1638                                 struct ieee80211_channel **channels,
1639                                 unsigned int n_channels,
1640                                 enum nl80211_bss_scan_width scan_width);
1641 int ieee80211_request_scan(struct ieee80211_sub_if_data *sdata,
1642                            struct cfg80211_scan_request *req);
1643 void ieee80211_scan_cancel(struct ieee80211_local *local);
1644 void ieee80211_run_deferred_scan(struct ieee80211_local *local);
1645 void ieee80211_scan_rx(struct ieee80211_local *local, struct sk_buff *skb);
1646
1647 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local);
1648 struct ieee80211_bss *
1649 ieee80211_bss_info_update(struct ieee80211_local *local,
1650                           struct ieee80211_rx_status *rx_status,
1651                           struct ieee80211_mgmt *mgmt,
1652                           size_t len,
1653                           struct ieee802_11_elems *elems,
1654                           struct ieee80211_channel *channel);
1655 void ieee80211_rx_bss_put(struct ieee80211_local *local,
1656                           struct ieee80211_bss *bss);
1657
1658 /* scheduled scan handling */
1659 int
1660 __ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1661                                      struct cfg80211_sched_scan_request *req);
1662 int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
1663                                        struct cfg80211_sched_scan_request *req);
1664 int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
1665 void ieee80211_sched_scan_end(struct ieee80211_local *local);
1666 void ieee80211_sched_scan_stopped_work(struct work_struct *work);
1667
1668 /* off-channel/mgmt-tx */
1669 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
1670 void ieee80211_offchannel_return(struct ieee80211_local *local);
1671 void ieee80211_roc_setup(struct ieee80211_local *local);
1672 void ieee80211_start_next_roc(struct ieee80211_local *local);
1673 void ieee80211_roc_purge(struct ieee80211_local *local,
1674                          struct ieee80211_sub_if_data *sdata);
1675 int ieee80211_remain_on_channel(struct wiphy *wiphy, struct wireless_dev *wdev,
1676                                 struct ieee80211_channel *chan,
1677                                 unsigned int duration, u64 *cookie);
1678 int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
1679                                        struct wireless_dev *wdev, u64 cookie);
1680 int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
1681                       struct cfg80211_mgmt_tx_params *params, u64 *cookie);
1682 int ieee80211_mgmt_tx_cancel_wait(struct wiphy *wiphy,
1683                                   struct wireless_dev *wdev, u64 cookie);
1684
1685 /* channel switch handling */
1686 void ieee80211_csa_finalize_work(struct work_struct *work);
1687 int ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
1688                              struct cfg80211_csa_settings *params);
1689
1690 /* interface handling */
1691 int ieee80211_iface_init(void);
1692 void ieee80211_iface_exit(void);
1693 int ieee80211_if_add(struct ieee80211_local *local, const char *name,
1694                      unsigned char name_assign_type,
1695                      struct wireless_dev **new_wdev, enum nl80211_iftype type,
1696                      struct vif_params *params);
1697 int ieee80211_if_change_type(struct ieee80211_sub_if_data *sdata,
1698                              enum nl80211_iftype type);
1699 void ieee80211_if_remove(struct ieee80211_sub_if_data *sdata);
1700 void ieee80211_remove_interfaces(struct ieee80211_local *local);
1701 u32 ieee80211_idle_off(struct ieee80211_local *local);
1702 void ieee80211_recalc_idle(struct ieee80211_local *local);
1703 void ieee80211_adjust_monitor_flags(struct ieee80211_sub_if_data *sdata,
1704                                     const int offset);
1705 int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up);
1706 void ieee80211_sdata_stop(struct ieee80211_sub_if_data *sdata);
1707 int ieee80211_add_virtual_monitor(struct ieee80211_local *local);
1708 void ieee80211_del_virtual_monitor(struct ieee80211_local *local);
1709
1710 bool __ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata);
1711 void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata,
1712                               bool update_bss);
1713
1714 static inline bool ieee80211_sdata_running(struct ieee80211_sub_if_data *sdata)
1715 {
1716         return test_bit(SDATA_STATE_RUNNING, &sdata->state);
1717 }
1718
1719 /* tx handling */
1720 void ieee80211_clear_tx_pending(struct ieee80211_local *local);
1721 void ieee80211_tx_pending(unsigned long data);
1722 netdev_tx_t ieee80211_monitor_start_xmit(struct sk_buff *skb,
1723                                          struct net_device *dev);
1724 netdev_tx_t ieee80211_subif_start_xmit(struct sk_buff *skb,
1725                                        struct net_device *dev);
1726 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
1727                                   struct net_device *dev,
1728                                   u32 info_flags);
1729 void ieee80211_purge_tx_queue(struct ieee80211_hw *hw,
1730                               struct sk_buff_head *skbs);
1731 struct sk_buff *
1732 ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata,
1733                               struct sk_buff *skb, u32 info_flags);
1734 void ieee80211_tx_monitor(struct ieee80211_local *local, struct sk_buff *skb,
1735                           struct ieee80211_supported_band *sband,
1736                           int retry_count, int shift, bool send_to_cooked);
1737
1738 void ieee80211_check_fast_xmit(struct sta_info *sta);
1739 void ieee80211_check_fast_xmit_all(struct ieee80211_local *local);
1740 void ieee80211_check_fast_xmit_iface(struct ieee80211_sub_if_data *sdata);
1741 void ieee80211_clear_fast_xmit(struct sta_info *sta);
1742
1743 /* HT */
1744 void ieee80211_apply_htcap_overrides(struct ieee80211_sub_if_data *sdata,
1745                                      struct ieee80211_sta_ht_cap *ht_cap);
1746 bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
1747                                        struct ieee80211_supported_band *sband,
1748                                        const struct ieee80211_ht_cap *ht_cap_ie,
1749                                        struct sta_info *sta);
1750 void ieee80211_send_delba(struct ieee80211_sub_if_data *sdata,
1751                           const u8 *da, u16 tid,
1752                           u16 initiator, u16 reason_code);
1753 int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
1754                                enum ieee80211_smps_mode smps, const u8 *da,
1755                                const u8 *bssid);
1756 void ieee80211_request_smps_ap_work(struct work_struct *work);
1757 void ieee80211_request_smps_mgd_work(struct work_struct *work);
1758 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
1759                                    enum ieee80211_smps_mode smps_mode_new);
1760
1761 void ___ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1762                                      u16 initiator, u16 reason, bool stop);
1763 void __ieee80211_stop_rx_ba_session(struct sta_info *sta, u16 tid,
1764                                     u16 initiator, u16 reason, bool stop);
1765 void __ieee80211_start_rx_ba_session(struct sta_info *sta,
1766                                      u8 dialog_token, u16 timeout,
1767                                      u16 start_seq_num, u16 ba_policy, u16 tid,
1768                                      u16 buf_size, bool tx, bool auto_seq);
1769 void ieee80211_sta_tear_down_BA_sessions(struct sta_info *sta,
1770                                          enum ieee80211_agg_stop_reason reason);
1771 void ieee80211_process_delba(struct ieee80211_sub_if_data *sdata,
1772                              struct sta_info *sta,
1773                              struct ieee80211_mgmt *mgmt, size_t len);
1774 void ieee80211_process_addba_resp(struct ieee80211_local *local,
1775                                   struct sta_info *sta,
1776                                   struct ieee80211_mgmt *mgmt,
1777                                   size_t len);
1778 void ieee80211_process_addba_request(struct ieee80211_local *local,
1779                                      struct sta_info *sta,
1780                                      struct ieee80211_mgmt *mgmt,
1781                                      size_t len);
1782
1783 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1784                                    enum ieee80211_agg_stop_reason reason);
1785 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
1786                                     enum ieee80211_agg_stop_reason reason);
1787 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
1788 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
1789 void ieee80211_ba_session_work(struct work_struct *work);
1790 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid);
1791 void ieee80211_release_reorder_timeout(struct sta_info *sta, int tid);
1792
1793 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs);
1794
1795 /* VHT */
1796 void
1797 ieee80211_vht_cap_ie_to_sta_vht_cap(struct ieee80211_sub_if_data *sdata,
1798                                     struct ieee80211_supported_band *sband,
1799                                     const struct ieee80211_vht_cap *vht_cap_ie,
1800                                     struct sta_info *sta);
1801 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cap_rx_bw(struct sta_info *sta);
1802 enum ieee80211_sta_rx_bandwidth ieee80211_sta_cur_vht_bw(struct sta_info *sta);
1803 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1804 enum ieee80211_sta_rx_bandwidth
1805 ieee80211_chan_width_to_rx_bw(enum nl80211_chan_width width);
1806 enum nl80211_chan_width ieee80211_sta_cap_chan_bw(struct sta_info *sta);
1807 void ieee80211_sta_set_rx_nss(struct sta_info *sta);
1808 void ieee80211_process_mu_groups(struct ieee80211_sub_if_data *sdata,
1809                                  struct ieee80211_mgmt *mgmt);
1810 u32 __ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1811                                   struct sta_info *sta, u8 opmode,
1812                                   enum nl80211_band band);
1813 void ieee80211_vht_handle_opmode(struct ieee80211_sub_if_data *sdata,
1814                                  struct sta_info *sta, u8 opmode,
1815                                  enum nl80211_band band);
1816 void ieee80211_apply_vhtcap_overrides(struct ieee80211_sub_if_data *sdata,
1817                                       struct ieee80211_sta_vht_cap *vht_cap);
1818 void ieee80211_get_vht_mask_from_cap(__le16 vht_cap,
1819                                      u16 vht_mask[NL80211_VHT_NSS_MAX]);
1820
1821 /* Spectrum management */
1822 void ieee80211_process_measurement_req(struct ieee80211_sub_if_data *sdata,
1823                                        struct ieee80211_mgmt *mgmt,
1824                                        size_t len);
1825 /**
1826  * ieee80211_parse_ch_switch_ie - parses channel switch IEs
1827  * @sdata: the sdata of the interface which has received the frame
1828  * @elems: parsed 802.11 elements received with the frame
1829  * @current_band: indicates the current band
1830  * @sta_flags: contains information about own capabilities and restrictions
1831  *      to decide which channel switch announcements can be accepted. Only the
1832  *      following subset of &enum ieee80211_sta_flags are evaluated:
1833  *      %IEEE80211_STA_DISABLE_HT, %IEEE80211_STA_DISABLE_VHT,
1834  *      %IEEE80211_STA_DISABLE_40MHZ, %IEEE80211_STA_DISABLE_80P80MHZ,
1835  *      %IEEE80211_STA_DISABLE_160MHZ.
1836  * @bssid: the currently connected bssid (for reporting)
1837  * @csa_ie: parsed 802.11 csa elements on count, mode, chandef and mesh ttl.
1838         All of them will be filled with if success only.
1839  * Return: 0 on success, <0 on error and >0 if there is nothing to parse.
1840  */
1841 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,
1842                                  struct ieee802_11_elems *elems,
1843                                  enum nl80211_band current_band,
1844                                  u32 sta_flags, u8 *bssid,
1845                                  struct ieee80211_csa_ie *csa_ie);
1846
1847 /* Suspend/resume and hw reconfiguration */
1848 int ieee80211_reconfig(struct ieee80211_local *local);
1849 void ieee80211_stop_device(struct ieee80211_local *local);
1850
1851 int __ieee80211_suspend(struct ieee80211_hw *hw,
1852                         struct cfg80211_wowlan *wowlan);
1853
1854 static inline int __ieee80211_resume(struct ieee80211_hw *hw)
1855 {
1856         struct ieee80211_local *local = hw_to_local(hw);
1857
1858         WARN(test_bit(SCAN_HW_SCANNING, &local->scanning) &&
1859              !test_bit(SCAN_COMPLETED, &local->scanning),
1860                 "%s: resume with hardware scan still in progress\n",
1861                 wiphy_name(hw->wiphy));
1862
1863         return ieee80211_reconfig(hw_to_local(hw));
1864 }
1865
1866 /* utility functions/constants */
1867 extern const void *const mac80211_wiphy_privid; /* for wiphy privid */
1868 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
1869                              int rate, int erp, int short_preamble,
1870                              int shift);
1871 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1872                                bool bss_notify, bool enable_qos);
1873 void ieee80211_xmit(struct ieee80211_sub_if_data *sdata,
1874                     struct sta_info *sta, struct sk_buff *skb);
1875
1876 void __ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1877                                  struct sk_buff *skb, int tid,
1878                                  enum nl80211_band band);
1879
1880 static inline void
1881 ieee80211_tx_skb_tid_band(struct ieee80211_sub_if_data *sdata,
1882                           struct sk_buff *skb, int tid,
1883                           enum nl80211_band band)
1884 {
1885         rcu_read_lock();
1886         __ieee80211_tx_skb_tid_band(sdata, skb, tid, band);
1887         rcu_read_unlock();
1888 }
1889
1890 static inline void ieee80211_tx_skb_tid(struct ieee80211_sub_if_data *sdata,
1891                                         struct sk_buff *skb, int tid)
1892 {
1893         struct ieee80211_chanctx_conf *chanctx_conf;
1894
1895         rcu_read_lock();
1896         chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1897         if (WARN_ON(!chanctx_conf)) {
1898                 rcu_read_unlock();
1899                 kfree_skb(skb);
1900                 return;
1901         }
1902
1903         __ieee80211_tx_skb_tid_band(sdata, skb, tid,
1904                                     chanctx_conf->def.chan->band);
1905         rcu_read_unlock();
1906 }
1907
1908 static inline void ieee80211_tx_skb(struct ieee80211_sub_if_data *sdata,
1909                                     struct sk_buff *skb)
1910 {
1911         /* Send all internal mgmt frames on VO. Accordingly set TID to 7. */
1912         ieee80211_tx_skb_tid(sdata, skb, 7);
1913 }
1914
1915 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1916                                struct ieee802_11_elems *elems,
1917                                u64 filter, u32 crc);
1918 static inline void ieee802_11_parse_elems(const u8 *start, size_t len,
1919                                           bool action,
1920                                           struct ieee802_11_elems *elems)
1921 {
1922         ieee802_11_parse_elems_crc(start, len, action, elems, 0, 0);
1923 }
1924
1925
1926 extern const int ieee802_1d_to_ac[8];
1927
1928 static inline int ieee80211_ac_from_tid(int tid)
1929 {
1930         return ieee802_1d_to_ac[tid & 7];
1931 }
1932
1933 void ieee80211_dynamic_ps_enable_work(struct work_struct *work);
1934 void ieee80211_dynamic_ps_disable_work(struct work_struct *work);
1935 void ieee80211_dynamic_ps_timer(unsigned long data);
1936 void ieee80211_send_nullfunc(struct ieee80211_local *local,
1937                              struct ieee80211_sub_if_data *sdata,
1938                              bool powersave);
1939 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1940                              struct ieee80211_hdr *hdr);
1941 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1942                              struct ieee80211_hdr *hdr, bool ack, u16 tx_time);
1943
1944 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
1945                                      unsigned long queues,
1946                                      enum queue_stop_reason reason,
1947                                      bool refcounted);
1948 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
1949                                struct ieee80211_sub_if_data *sdata,
1950                                enum queue_stop_reason reason);
1951 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
1952                                struct ieee80211_sub_if_data *sdata,
1953                                enum queue_stop_reason reason);
1954 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
1955                                      unsigned long queues,
1956                                      enum queue_stop_reason reason,
1957                                      bool refcounted);
1958 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
1959                                     enum queue_stop_reason reason,
1960                                     bool refcounted);
1961 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
1962                                     enum queue_stop_reason reason,
1963                                     bool refcounted);
1964 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
1965 void ieee80211_add_pending_skb(struct ieee80211_local *local,
1966                                struct sk_buff *skb);
1967 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
1968                                 struct sk_buff_head *skbs);
1969 void ieee80211_flush_queues(struct ieee80211_local *local,
1970                             struct ieee80211_sub_if_data *sdata, bool drop);
1971 void __ieee80211_flush_queues(struct ieee80211_local *local,
1972                               struct ieee80211_sub_if_data *sdata,
1973                               unsigned int queues, bool drop);
1974
1975 static inline bool ieee80211_can_run_worker(struct ieee80211_local *local)
1976 {
1977         /*
1978          * If quiescing is set, we are racing with __ieee80211_suspend.
1979          * __ieee80211_suspend flushes the workers after setting quiescing,
1980          * and we check quiescing / suspended before enqueing new workers.
1981          * We should abort the worker to avoid the races below.
1982          */
1983         if (local->quiescing)
1984                 return false;
1985
1986         /*
1987          * We might already be suspended if the following scenario occurs:
1988          * __ieee80211_suspend          Control path
1989          *
1990          *                              if (local->quiescing)
1991          *                                      return;
1992          * local->quiescing = true;
1993          * flush_workqueue();
1994          *                              queue_work(...);
1995          * local->suspended = true;
1996          * local->quiescing = false;
1997          *                              worker starts running...
1998          */
1999         if (local->suspended)
2000                 return false;
2001
2002         return true;
2003 }
2004
2005 int ieee80211_txq_setup_flows(struct ieee80211_local *local);
2006 void ieee80211_txq_teardown_flows(struct ieee80211_local *local);
2007 void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
2008                         struct sta_info *sta,
2009                         struct txq_info *txq, int tid);
2010 void ieee80211_txq_purge(struct ieee80211_local *local,
2011                          struct txq_info *txqi);
2012 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
2013                          u16 transaction, u16 auth_alg, u16 status,
2014                          const u8 *extra, size_t extra_len, const u8 *bssid,
2015                          const u8 *da, const u8 *key, u8 key_len, u8 key_idx,
2016                          u32 tx_flags);
2017 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
2018                                     const u8 *bssid, u16 stype, u16 reason,
2019                                     bool send_frame, u8 *frame_buf);
2020 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
2021                              size_t buffer_len,
2022                              struct ieee80211_scan_ies *ie_desc,
2023                              const u8 *ie, size_t ie_len,
2024                              u8 bands_used, u32 *rate_masks,
2025                              struct cfg80211_chan_def *chandef);
2026 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2027                                           const u8 *src, const u8 *dst,
2028                                           u32 ratemask,
2029                                           struct ieee80211_channel *chan,
2030                                           const u8 *ssid, size_t ssid_len,
2031                                           const u8 *ie, size_t ie_len,
2032                                           bool directed);
2033 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
2034                               const u8 *src, const u8 *dst,
2035                               const u8 *ssid, size_t ssid_len,
2036                               const u8 *ie, size_t ie_len,
2037                               u32 ratemask, bool directed, u32 tx_flags,
2038                               struct ieee80211_channel *channel, bool scan);
2039
2040 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2041                             struct ieee802_11_elems *elems,
2042                             enum nl80211_band band, u32 *basic_rates);
2043 int __ieee80211_request_smps_mgd(struct ieee80211_sub_if_data *sdata,
2044                                  enum ieee80211_smps_mode smps_mode);
2045 int __ieee80211_request_smps_ap(struct ieee80211_sub_if_data *sdata,
2046                                 enum ieee80211_smps_mode smps_mode);
2047 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata);
2048 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata);
2049
2050 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset);
2051 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2052                               u16 cap);
2053 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2054                                const struct cfg80211_chan_def *chandef,
2055                                u16 prot_mode, bool rifs_mode);
2056 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2057                                u32 cap);
2058 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2059                                 const struct cfg80211_chan_def *chandef);
2060 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2061                              const struct ieee80211_supported_band *sband,
2062                              const u8 *srates, int srates_len, u32 *rates);
2063 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2064                             struct sk_buff *skb, bool need_basic,
2065                             enum nl80211_band band);
2066 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2067                                 struct sk_buff *skb, bool need_basic,
2068                                 enum nl80211_band band);
2069 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo);
2070
2071 /* channel management */
2072 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2073                                struct cfg80211_chan_def *chandef);
2074 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2075                                 struct cfg80211_chan_def *chandef);
2076 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c);
2077
2078 int __must_check
2079 ieee80211_vif_use_channel(struct ieee80211_sub_if_data *sdata,
2080                           const struct cfg80211_chan_def *chandef,
2081                           enum ieee80211_chanctx_mode mode);
2082 int __must_check
2083 ieee80211_vif_reserve_chanctx(struct ieee80211_sub_if_data *sdata,
2084                               const struct cfg80211_chan_def *chandef,
2085                               enum ieee80211_chanctx_mode mode,
2086                               bool radar_required);
2087 int __must_check
2088 ieee80211_vif_use_reserved_context(struct ieee80211_sub_if_data *sdata);
2089 int ieee80211_vif_unreserve_chanctx(struct ieee80211_sub_if_data *sdata);
2090
2091 int __must_check
2092 ieee80211_vif_change_bandwidth(struct ieee80211_sub_if_data *sdata,
2093                                const struct cfg80211_chan_def *chandef,
2094                                u32 *changed);
2095 void ieee80211_vif_release_channel(struct ieee80211_sub_if_data *sdata);
2096 void ieee80211_vif_vlan_copy_chanctx(struct ieee80211_sub_if_data *sdata);
2097 void ieee80211_vif_copy_chanctx_to_vlans(struct ieee80211_sub_if_data *sdata,
2098                                          bool clear);
2099 int ieee80211_chanctx_refcount(struct ieee80211_local *local,
2100                                struct ieee80211_chanctx *ctx);
2101
2102 void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
2103                                    struct ieee80211_chanctx *chanctx);
2104 void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
2105                                       struct ieee80211_chanctx *ctx);
2106 bool ieee80211_is_radar_required(struct ieee80211_local *local);
2107
2108 void ieee80211_dfs_cac_timer(unsigned long data);
2109 void ieee80211_dfs_cac_timer_work(struct work_struct *work);
2110 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local);
2111 void ieee80211_dfs_radar_detected_work(struct work_struct *work);
2112 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2113                               struct cfg80211_csa_settings *csa_settings);
2114
2115 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs);
2116 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n);
2117 const struct ieee80211_cipher_scheme *
2118 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2119                  enum nl80211_iftype iftype);
2120 int ieee80211_cs_headroom(struct ieee80211_local *local,
2121                           struct cfg80211_crypto_settings *crypto,
2122                           enum nl80211_iftype iftype);
2123 void ieee80211_recalc_dtim(struct ieee80211_local *local,
2124                            struct ieee80211_sub_if_data *sdata);
2125 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
2126                                  const struct cfg80211_chan_def *chandef,
2127                                  enum ieee80211_chanctx_mode chanmode,
2128                                  u8 radar_detect);
2129 int ieee80211_max_num_channels(struct ieee80211_local *local);
2130 enum nl80211_chan_width ieee80211_get_sta_bw(struct ieee80211_sta *sta);
2131 void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
2132                                        struct ieee80211_chanctx *ctx);
2133
2134 /* TDLS */
2135 int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev,
2136                         const u8 *peer, u8 action_code, u8 dialog_token,
2137                         u16 status_code, u32 peer_capability,
2138                         bool initiator, const u8 *extra_ies,
2139                         size_t extra_ies_len);
2140 int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev,
2141                         const u8 *peer, enum nl80211_tdls_operation oper);
2142 void ieee80211_tdls_peer_del_work(struct work_struct *wk);
2143 int ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev,
2144                                   const u8 *addr, u8 oper_class,
2145                                   struct cfg80211_chan_def *chandef);
2146 void ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy,
2147                                           struct net_device *dev,
2148                                           const u8 *addr);
2149 void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata);
2150 void ieee80211_tdls_chsw_work(struct work_struct *wk);
2151
2152 extern const struct ethtool_ops ieee80211_ethtool_ops;
2153
2154 #ifdef CONFIG_MAC80211_NOINLINE
2155 #define debug_noinline noinline
2156 #else
2157 #define debug_noinline
2158 #endif
2159
2160 #endif /* IEEE80211_I_H */