source: src/linux/universal/linux-4.9/net/mac80211/sta_info.h @ 31662

Last change on this file since 31662 was 31662, checked in by brainslayer, 6 weeks ago

use new squashfs in all kernels

File size: 25.0 KB
Line 
1/*
2 * Copyright 2002-2005, Devicescape Software, Inc.
3 * Copyright 2013-2014  Intel Mobile Communications GmbH
4 * Copyright(c) 2015-2016 Intel Deutschland GmbH
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11#ifndef STA_INFO_H
12#define STA_INFO_H
13
14#include <linux/list.h>
15#include <linux/types.h>
16#include <linux/if_ether.h>
17#include <linux/workqueue.h>
18#include <linux/average.h>
19#include <linux/etherdevice.h>
20#include <linux/rhashtable.h>
21#include <linux/u64_stats_sync.h>
22#include "key.h"
23
24/**
25 * enum ieee80211_sta_info_flags - Stations flags
26 *
27 * These flags are used with &struct sta_info's @flags member, but
28 * only indirectly with set_sta_flag() and friends.
29 *
30 * @WLAN_STA_AUTH: Station is authenticated.
31 * @WLAN_STA_ASSOC: Station is associated.
32 * @WLAN_STA_PS_STA: Station is in power-save mode
33 * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic.
34 *      This bit is always checked so needs to be enabled for all stations
35 *      when virtual port control is not in use.
36 * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble
37 *      frames.
38 * @WLAN_STA_WDS: Station is one of our WDS peers.
39 * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the
40 *      IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next
41 *      frame to this station is transmitted.
42 * @WLAN_STA_MFP: Management frame protection is used with this STA.
43 * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX)
44 *      during suspend/resume and station removal.
45 * @WLAN_STA_PS_DRIVER: driver requires keeping this station in
46 *      power-save mode logically to flush frames that might still
47 *      be in the queues
48 * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
49 *      station in power-save mode, reply when the driver unblocks.
50 * @WLAN_STA_TDLS_PEER: Station is a TDLS peer.
51 * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct
52 *      packets. This means the link is enabled.
53 * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this
54 *      station.
55 * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching
56 * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this
57 *      TDLS peer
58 * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on
59 *      the BSS base channel.
60 * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was
61 *      keeping station in power-save mode, reply when the driver
62 *      unblocks the station.
63 * @WLAN_STA_SP: Station is in a service period, so don't try to
64 *      reply to other uAPSD trigger frames or PS-Poll.
65 * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame.
66 * @WLAN_STA_INSERTED: This station is inserted into the hash table.
67 * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station.
68 * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid.
69 * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period.
70 * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP.
71 * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX
72 *      until pending frames are delivered
73 *
74 * @NUM_WLAN_STA_FLAGS: number of defined flags
75 */
76enum ieee80211_sta_info_flags {
77        WLAN_STA_AUTH,
78        WLAN_STA_ASSOC,
79        WLAN_STA_PS_STA,
80        WLAN_STA_AUTHORIZED,
81        WLAN_STA_SHORT_PREAMBLE,
82        WLAN_STA_WDS,
83        WLAN_STA_CLEAR_PS_FILT,
84        WLAN_STA_MFP,
85        WLAN_STA_BLOCK_BA,
86        WLAN_STA_PS_DRIVER,
87        WLAN_STA_PSPOLL,
88        WLAN_STA_TDLS_PEER,
89        WLAN_STA_TDLS_PEER_AUTH,
90        WLAN_STA_TDLS_INITIATOR,
91        WLAN_STA_TDLS_CHAN_SWITCH,
92        WLAN_STA_TDLS_OFF_CHANNEL,
93        WLAN_STA_TDLS_WIDER_BW,
94        WLAN_STA_UAPSD,
95        WLAN_STA_SP,
96        WLAN_STA_4ADDR_EVENT,
97        WLAN_STA_INSERTED,
98        WLAN_STA_RATE_CONTROL,
99        WLAN_STA_TOFFSET_KNOWN,
100        WLAN_STA_MPSP_OWNER,
101        WLAN_STA_MPSP_RECIPIENT,
102        WLAN_STA_PS_DELIVER,
103
104        NUM_WLAN_STA_FLAGS,
105};
106
107#define ADDBA_RESP_INTERVAL HZ
108#define HT_AGG_MAX_RETRIES              15
109#define HT_AGG_BURST_RETRIES            3
110#define HT_AGG_RETRIES_PERIOD           (15 * HZ)
111
112#define HT_AGG_STATE_DRV_READY          0
113#define HT_AGG_STATE_RESPONSE_RECEIVED  1
114#define HT_AGG_STATE_OPERATIONAL        2
115#define HT_AGG_STATE_STOPPING           3
116#define HT_AGG_STATE_WANT_START         4
117#define HT_AGG_STATE_WANT_STOP          5
118
119enum ieee80211_agg_stop_reason {
120        AGG_STOP_DECLINED,
121        AGG_STOP_LOCAL_REQUEST,
122        AGG_STOP_PEER_REQUEST,
123        AGG_STOP_DESTROY_STA,
124};
125
126/**
127 * struct tid_ampdu_tx - TID aggregation information (Tx).
128 *
129 * @rcu_head: rcu head for freeing structure
130 * @session_timer: check if we keep Tx-ing on the TID (by timeout value)
131 * @addba_resp_timer: timer for peer's response to addba request
132 * @pending: pending frames queue -- use sta's spinlock to protect
133 * @dialog_token: dialog token for aggregation session
134 * @timeout: session timeout value to be filled in ADDBA requests
135 * @state: session state (see above)
136 * @last_tx: jiffies of last tx activity
137 * @stop_initiator: initiator of a session stop
138 * @tx_stop: TX DelBA frame when stopping
139 * @buf_size: reorder buffer size at receiver
140 * @failed_bar_ssn: ssn of the last failed BAR tx attempt
141 * @bar_pending: BAR needs to be re-sent
142 * @amsdu: support A-MSDU withing A-MDPU
143 *
144 * This structure's lifetime is managed by RCU, assignments to
145 * the array holding it must hold the aggregation mutex.
146 *
147 * The TX path can access it under RCU lock-free if, and
148 * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL
149 * set. Otherwise, the TX path must also acquire the spinlock
150 * and re-check the state, see comments in the tx code
151 * touching it.
152 */
153struct tid_ampdu_tx {
154        struct rcu_head rcu_head;
155        struct timer_list session_timer;
156        struct timer_list addba_resp_timer;
157        struct sk_buff_head pending;
158        unsigned long state;
159        unsigned long last_tx;
160        u16 timeout;
161        u8 dialog_token;
162        u8 stop_initiator;
163        bool tx_stop;
164        u8 buf_size;
165
166        u16 failed_bar_ssn;
167        bool bar_pending;
168        bool amsdu;
169};
170
171/**
172 * struct tid_ampdu_rx - TID aggregation information (Rx).
173 *
174 * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an
175 *      A-MSDU with individually reported subframes.
176 * @reorder_buf_filtered: bitmap indicating where there are filtered frames in
177 *      the reorder buffer that should be ignored when releasing frames
178 * @reorder_time: jiffies when skb was added
179 * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value)
180 * @reorder_timer: releases expired frames from the reorder buffer.
181 * @last_rx: jiffies of last rx activity
182 * @head_seq_num: head sequence number in reordering buffer.
183 * @stored_mpdu_num: number of MPDUs in reordering buffer
184 * @ssn: Starting Sequence Number expected to be aggregated.
185 * @buf_size: buffer size for incoming A-MPDUs
186 * @timeout: reset timer value (in TUs).
187 * @rcu_head: RCU head used for freeing this struct
188 * @reorder_lock: serializes access to reorder buffer, see below.
189 * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and
190 *      and ssn.
191 * @removed: this session is removed (but might have been found due to RCU)
192 * @started: this session has started (head ssn or higher was received)
193 *
194 * This structure's lifetime is managed by RCU, assignments to
195 * the array holding it must hold the aggregation mutex.
196 *
197 * The @reorder_lock is used to protect the members of this
198 * struct, except for @timeout, @buf_size and @dialog_token,
199 * which are constant across the lifetime of the struct (the
200 * dialog token being used only for debugging).
201 */
202struct tid_ampdu_rx {
203        struct rcu_head rcu_head;
204        spinlock_t reorder_lock;
205        u64 reorder_buf_filtered;
206        struct sk_buff_head *reorder_buf;
207        unsigned long *reorder_time;
208        struct timer_list session_timer;
209        struct timer_list reorder_timer;
210        unsigned long last_rx;
211        u16 head_seq_num;
212        u16 stored_mpdu_num;
213        u16 ssn;
214        u16 buf_size;
215        u16 timeout;
216        u8 auto_seq:1,
217           removed:1,
218           started:1;
219};
220
221/**
222 * struct sta_ampdu_mlme - STA aggregation information.
223 *
224 * @mtx: mutex to protect all TX data (except non-NULL assignments
225 *      to tid_tx[idx], which are protected by the sta spinlock)
226 *      tid_start_tx is also protected by sta->lock.
227 * @tid_rx: aggregation info for Rx per TID -- RCU protected
228 * @tid_rx_token: dialog tokens for valid aggregation sessions
229 * @tid_rx_timer_expired: bitmap indicating on which TIDs the
230 *      RX timer expired until the work for it runs
231 * @tid_rx_stop_requested:  bitmap indicating which BA sessions per TID the
232 *      driver requested to close until the work for it runs
233 * @agg_session_valid: bitmap indicating which TID has a rx BA session open on
234 * @unexpected_agg: bitmap indicating which TID already sent a delBA due to
235 *      unexpected aggregation related frames outside a session
236 * @work: work struct for starting/stopping aggregation
237 * @tid_tx: aggregation info for Tx per TID
238 * @tid_start_tx: sessions where start was requested
239 * @last_addba_req_time: timestamp of the last addBA request.
240 * @addba_req_num: number of times addBA request has been sent.
241 * @dialog_token_allocator: dialog token enumerator for each new session;
242 */
243struct sta_ampdu_mlme {
244        struct mutex mtx;
245        /* rx */
246        struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS];
247        u8 tid_rx_token[IEEE80211_NUM_TIDS];
248        unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
249        unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
250        unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
251        unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)];
252        /* tx */
253        struct work_struct work;
254        struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS];
255        struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS];
256        unsigned long last_addba_req_time[IEEE80211_NUM_TIDS];
257        u8 addba_req_num[IEEE80211_NUM_TIDS];
258        u8 dialog_token_allocator;
259};
260
261
262/* Value to indicate no TID reservation */
263#define IEEE80211_TID_UNRESERVED        0xff
264
265#define IEEE80211_FAST_XMIT_MAX_IV      18
266
267/**
268 * struct ieee80211_fast_tx - TX fastpath information
269 * @key: key to use for hw crypto
270 * @hdr: the 802.11 header to put with the frame
271 * @hdr_len: actual 802.11 header length
272 * @sa_offs: offset of the SA
273 * @da_offs: offset of the DA
274 * @pn_offs: offset where to put PN for crypto (or 0 if not needed)
275 * @band: band this will be transmitted on, for tx_info
276 * @rcu_head: RCU head to free this struct
277 *
278 * This struct is small enough so that the common case (maximum crypto
279 * header length of 8 like for CCMP/GCMP) fits into a single 64-byte
280 * cache line.
281 */
282struct ieee80211_fast_tx {
283        struct ieee80211_key *key;
284        u8 hdr_len;
285        u8 sa_offs, da_offs, pn_offs;
286        u8 band;
287        u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV +
288               sizeof(rfc1042_header)] __aligned(2);
289
290        struct rcu_head rcu_head;
291};
292
293/**
294 * struct ieee80211_fast_rx - RX fastpath information
295 * @dev: netdevice for reporting the SKB
296 * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type)
297 * @vif_addr: interface address
298 * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache)
299 * @control_port_protocol: control port protocol copied from sdata
300 * @expected_ds_bits: from/to DS bits expected
301 * @icv_len: length of the MIC if present
302 * @key: bool indicating encryption is expected (key is set)
303 * @sta_notify: notify the MLME code (once)
304 * @internal_forward: forward froms internally on AP/VLAN type interfaces
305 * @uses_rss: copy of USES_RSS hw flag
306 * @da_offs: offset of the DA in the header (for header conversion)
307 * @sa_offs: offset of the SA in the header (for header conversion)
308 * @rcu_head: RCU head for freeing this structure
309 */
310struct ieee80211_fast_rx {
311        struct net_device *dev;
312        enum nl80211_iftype vif_type;
313        u8 vif_addr[ETH_ALEN] __aligned(2);
314        u8 rfc1042_hdr[6] __aligned(2);
315        __be16 control_port_protocol;
316        __le16 expected_ds_bits;
317        u8 icv_len;
318        u8 key:1,
319           sta_notify:1,
320           internal_forward:1,
321           uses_rss:1;
322        u8 da_offs, sa_offs;
323
324        struct rcu_head rcu_head;
325};
326
327/**
328 * struct mesh_sta - mesh STA information
329 * @plink_lock: serialize access to plink fields
330 * @llid: Local link ID
331 * @plid: Peer link ID
332 * @aid: local aid supplied by peer
333 * @reason: Cancel reason on PLINK_HOLDING state
334 * @plink_retries: Retries in establishment
335 * @plink_state: peer link state
336 * @plink_timeout: timeout of peer link
337 * @plink_timer: peer link watch timer
338 * @t_offset: timing offset relative to this host
339 * @t_offset_setpoint: reference timing offset of this sta to be used when
340 *      calculating clockdrift
341 * @local_pm: local link-specific power save mode
342 * @peer_pm: peer-specific power save mode towards local STA
343 * @nonpeer_pm: STA power save mode towards non-peer neighbors
344 * @processed_beacon: set to true after peer rates and capabilities are
345 *      processed
346 * @fail_avg: moving percentage of failed MSDUs
347 */
348struct mesh_sta {
349        struct timer_list plink_timer;
350
351        s64 t_offset;
352        s64 t_offset_setpoint;
353
354        spinlock_t plink_lock;
355        u16 llid;
356        u16 plid;
357        u16 aid;
358        u16 reason;
359        u8 plink_retries;
360
361        bool processed_beacon;
362
363        enum nl80211_plink_state plink_state;
364        u32 plink_timeout;
365
366        /* mesh power save */
367        enum nl80211_mesh_power_mode local_pm;
368        enum nl80211_mesh_power_mode peer_pm;
369        enum nl80211_mesh_power_mode nonpeer_pm;
370
371        /* moving percentage of failed MSDUs */
372        unsigned int fail_avg;
373};
374
375DECLARE_EWMA(signal, 1024, 8)
376
377struct ieee80211_sta_rx_stats {
378        unsigned long packets;
379        unsigned long last_rx;
380        unsigned long num_duplicates;
381        unsigned long fragments;
382        unsigned long dropped;
383        int last_signal;
384        u8 chains;
385        s8 chain_signal_last[IEEE80211_MAX_CHAINS];
386        u16 last_rate;
387        struct u64_stats_sync syncp;
388        u64 bytes;
389        u64 msdu[IEEE80211_NUM_TIDS + 1];
390};
391
392/**
393 * struct sta_info - STA information
394 *
395 * This structure collects information about a station that
396 * mac80211 is communicating with.
397 *
398 * @list: global linked list entry
399 * @free_list: list entry for keeping track of stations to free
400 * @hash_node: hash node for rhashtable
401 * @addr: station's MAC address - duplicated from public part to
402 *      let the hash table work with just a single cacheline
403 * @local: pointer to the global information
404 * @sdata: virtual interface this station belongs to
405 * @ptk: peer keys negotiated with this station, if any
406 * @ptk_idx: last installed peer key index
407 * @gtk: group keys negotiated with this station, if any
408 * @rate_ctrl: rate control algorithm reference
409 * @rate_ctrl_lock: spinlock used to protect rate control data
410 *      (data inside the algorithm, so serializes calls there)
411 * @rate_ctrl_priv: rate control private per-STA pointer
412 * @lock: used for locking all fields that require locking, see comments
413 *      in the header file.
414 * @drv_deliver_wk: used for delivering frames after driver PS unblocking
415 * @listen_interval: listen interval of this station, when we're acting as AP
416 * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly
417 * @ps_lock: used for powersave (when mac80211 is the AP) related locking
418 * @ps_tx_buf: buffers (per AC) of frames to transmit to this station
419 *      when it leaves power saving state or polls
420 * @tx_filtered: buffers (per AC) of frames we already tried to
421 *      transmit but were filtered by hardware due to STA having
422 *      entered power saving state, these are also delivered to
423 *      the station when it leaves powersave or polls for frames
424 * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on
425 * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on
426 * @last_connected: time (in seconds) when a station got connected
427 * @last_seq_ctrl: last received seq/frag number from this STA (per TID
428 *      plus one for non-QoS frames)
429 * @tid_seq: per-TID sequence numbers for sending to this STA
430 * @ampdu_mlme: A-MPDU state machine state
431 * @timer_to_tid: identity mapping to ID timers
432 * @mesh: mesh STA information
433 * @debugfs_dir: debug filesystem directory dentry
434 * @dead: set to true when sta is unlinked
435 * @removed: set to true when sta is being removed from sta_list
436 * @uploaded: set to true when sta is uploaded to the driver
437 * @sta: station information we share with the driver
438 * @sta_state: duplicates information about station state (for debug)
439 * @rcu_head: RCU head used for freeing this station struct
440 * @cur_max_bandwidth: maximum bandwidth to use for TX to the station,
441 *      taken from HT/VHT capabilities or VHT operating mode notification
442 * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for
443 *      AP only.
444 * @cipher_scheme: optional cipher scheme for this station
445 * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED)
446 * @fast_tx: TX fastpath information
447 * @fast_rx: RX fastpath information
448 * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to
449 *      the BSS one.
450 * @tx_stats: TX statistics
451 * @rx_stats: RX statistics
452 * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs
453 *      this (by advertising the USES_RSS hw flag)
454 * @status_stats: TX status statistics
455 */
456struct sta_info {
457        /* General information, mostly static */
458        struct list_head list, free_list;
459        struct rcu_head rcu_head;
460        struct rhlist_head hash_node;
461        u8 addr[ETH_ALEN];
462        struct ieee80211_local *local;
463        struct ieee80211_sub_if_data *sdata;
464        struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS];
465        struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS];
466        u8 ptk_idx;
467        struct rate_control_ref *rate_ctrl;
468        void *rate_ctrl_priv;
469        spinlock_t rate_ctrl_lock;
470        spinlock_t lock;
471
472        struct ieee80211_fast_tx __rcu *fast_tx;
473        struct ieee80211_fast_rx __rcu *fast_rx;
474        struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats;
475
476#ifdef CONFIG_MAC80211_MESH
477        struct mesh_sta *mesh;
478#endif
479
480        struct work_struct drv_deliver_wk;
481
482        u16 listen_interval;
483
484        bool dead;
485        bool removed;
486
487        bool uploaded;
488
489        enum ieee80211_sta_state sta_state;
490
491        /* use the accessors defined below */
492        unsigned long _flags;
493
494        /* STA powersave lock and frame queues */
495        spinlock_t ps_lock;
496        struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS];
497        struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS];
498        unsigned long driver_buffered_tids;
499        unsigned long txq_buffered_tids;
500
501        long last_connected;
502
503        /* Updated from RX path only, no locking requirements */
504        struct ieee80211_sta_rx_stats rx_stats;
505        struct {
506                struct ewma_signal signal;
507                struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS];
508        } rx_stats_avg;
509
510        /* Plus 1 for non-QoS frames */
511        __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1];
512
513        /* Updated from TX status path only, no locking requirements */
514        struct {
515                unsigned long filtered;
516                unsigned long retry_failed, retry_count;
517                unsigned int lost_packets;
518                unsigned long last_tdls_pkt_time;
519                u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
520                u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
521                unsigned long last_ack;
522        } status_stats;
523
524        /* Updated from TX path only, no locking requirements */
525        struct {
526                u64 packets[IEEE80211_NUM_ACS];
527                u64 bytes[IEEE80211_NUM_ACS];
528                struct ieee80211_tx_rate last_rate;
529                u64 msdu[IEEE80211_NUM_TIDS + 1];
530        } tx_stats;
531        u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
532
533        /*
534         * Aggregation information, locked with lock.
535         */
536        struct sta_ampdu_mlme ampdu_mlme;
537        u8 timer_to_tid[IEEE80211_NUM_TIDS];
538
539#ifdef CONFIG_MAC80211_DEBUGFS
540        struct dentry *debugfs_dir;
541#endif
542
543        enum ieee80211_sta_rx_bandwidth cur_max_bandwidth;
544
545        enum ieee80211_smps_mode known_smps_mode;
546        const struct ieee80211_cipher_scheme *cipher_scheme;
547
548        u8 reserved_tid;
549
550        struct cfg80211_chan_def tdls_chandef;
551
552        /* keep last! */
553        struct ieee80211_sta sta;
554};
555
556static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta)
557{
558#ifdef CONFIG_MAC80211_MESH
559        return sta->mesh->plink_state;
560#endif
561        return NL80211_PLINK_LISTEN;
562}
563
564static inline void set_sta_flag(struct sta_info *sta,
565                                enum ieee80211_sta_info_flags flag)
566{
567        WARN_ON(flag == WLAN_STA_AUTH ||
568                flag == WLAN_STA_ASSOC ||
569                flag == WLAN_STA_AUTHORIZED);
570        set_bit(flag, &sta->_flags);
571}
572
573static inline void clear_sta_flag(struct sta_info *sta,
574                                  enum ieee80211_sta_info_flags flag)
575{
576        WARN_ON(flag == WLAN_STA_AUTH ||
577                flag == WLAN_STA_ASSOC ||
578                flag == WLAN_STA_AUTHORIZED);
579        clear_bit(flag, &sta->_flags);
580}
581
582static inline int test_sta_flag(struct sta_info *sta,
583                                enum ieee80211_sta_info_flags flag)
584{
585        return test_bit(flag, &sta->_flags);
586}
587
588static inline int test_and_clear_sta_flag(struct sta_info *sta,
589                                          enum ieee80211_sta_info_flags flag)
590{
591        WARN_ON(flag == WLAN_STA_AUTH ||
592                flag == WLAN_STA_ASSOC ||
593                flag == WLAN_STA_AUTHORIZED);
594        return test_and_clear_bit(flag, &sta->_flags);
595}
596
597static inline int test_and_set_sta_flag(struct sta_info *sta,
598                                        enum ieee80211_sta_info_flags flag)
599{
600        WARN_ON(flag == WLAN_STA_AUTH ||
601                flag == WLAN_STA_ASSOC ||
602                flag == WLAN_STA_AUTHORIZED);
603        return test_and_set_bit(flag, &sta->_flags);
604}
605
606int sta_info_move_state(struct sta_info *sta,
607                        enum ieee80211_sta_state new_state);
608
609static inline void sta_info_pre_move_state(struct sta_info *sta,
610                                           enum ieee80211_sta_state new_state)
611{
612        int ret;
613
614        WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED));
615
616        ret = sta_info_move_state(sta, new_state);
617        WARN_ON_ONCE(ret);
618}
619
620
621void ieee80211_assign_tid_tx(struct sta_info *sta, int tid,
622                             struct tid_ampdu_tx *tid_tx);
623
624static inline struct tid_ampdu_tx *
625rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid)
626{
627        return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid],
628                                         lockdep_is_held(&sta->lock) ||
629                                         lockdep_is_held(&sta->ampdu_mlme.mtx));
630}
631
632/* Maximum number of frames to buffer per power saving station per AC */
633#define STA_MAX_TX_BUFFER       64
634
635/* Minimum buffered frame expiry time. If STA uses listen interval that is
636 * smaller than this value, the minimum value here is used instead. */
637#define STA_TX_BUFFER_EXPIRE (10 * HZ)
638
639/* How often station data is cleaned up (e.g., expiration of buffered frames)
640 */
641#define STA_INFO_CLEANUP_INTERVAL (10 * HZ)
642
643struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local,
644                                         const u8 *addr);
645
646/*
647 * Get a STA info, must be under RCU read lock.
648 */
649struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata,
650                              const u8 *addr);
651
652struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata,
653                                  const u8 *addr);
654
655#define for_each_sta_info(local, _addr, _sta, _tmp)                     \
656        rhl_for_each_entry_rcu(_sta, _tmp,                              \
657                               sta_info_hash_lookup(local, _addr), hash_node)
658
659/*
660 * Get STA info by index, BROKEN!
661 */
662struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata,
663                                     int idx);
664/*
665 * Create a new STA info, caller owns returned structure
666 * until sta_info_insert().
667 */
668struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
669                                const u8 *addr, gfp_t gfp);
670
671void sta_info_free(struct ieee80211_local *local, struct sta_info *sta);
672
673/*
674 * Insert STA info into hash table/list, returns zero or a
675 * -EEXIST if (if the same MAC address is already present).
676 *
677 * Calling the non-rcu version makes the caller relinquish,
678 * the _rcu version calls read_lock_rcu() and must be called
679 * without it held.
680 */
681int sta_info_insert(struct sta_info *sta);
682int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU);
683
684int __must_check __sta_info_destroy(struct sta_info *sta);
685int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata,
686                          const u8 *addr);
687int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata,
688                              const u8 *addr);
689
690void sta_info_recalc_tim(struct sta_info *sta);
691
692int sta_info_init(struct ieee80211_local *local);
693void sta_info_stop(struct ieee80211_local *local);
694
695/**
696 * sta_info_flush - flush matching STA entries from the STA table
697 *
698 * Returns the number of removed STA entries.
699 *
700 * @sdata: sdata to remove all stations from
701 * @vlans: if the given interface is an AP interface, also flush VLANs
702 */
703int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans);
704
705static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata)
706{
707        return __sta_info_flush(sdata, false);
708}
709
710void sta_set_rate_info_tx(struct sta_info *sta,
711                          const struct ieee80211_tx_rate *rate,
712                          struct rate_info *rinfo);
713void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo);
714
715u32 sta_get_expected_throughput(struct sta_info *sta);
716
717void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata,
718                          unsigned long exp_time);
719u8 sta_info_tx_streams(struct sta_info *sta);
720
721void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta);
722void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta);
723void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta);
724
725unsigned long ieee80211_sta_last_active(struct sta_info *sta);
726
727#define STA_STATS_RATE_INVALID          0
728#define STA_STATS_RATE_VHT              0x8000
729#define STA_STATS_RATE_HT               0x4000
730#define STA_STATS_RATE_LEGACY           0x2000
731#define STA_STATS_RATE_SGI              0x1000
732#define STA_STATS_RATE_BW_SHIFT         9
733#define STA_STATS_RATE_BW_MASK          (0x7 << STA_STATS_RATE_BW_SHIFT)
734
735static inline u16 sta_stats_encode_rate(struct ieee80211_rx_status *s)
736{
737        u16 r = s->rate_idx;
738
739        if (s->vht_flag & RX_VHT_FLAG_80MHZ)
740                r |= RATE_INFO_BW_80 << STA_STATS_RATE_BW_SHIFT;
741        else if (s->vht_flag & RX_VHT_FLAG_160MHZ)
742                r |= RATE_INFO_BW_160 << STA_STATS_RATE_BW_SHIFT;
743        else if (s->flag & RX_FLAG_40MHZ)
744                r |= RATE_INFO_BW_40 << STA_STATS_RATE_BW_SHIFT;
745        else if (s->flag & RX_FLAG_10MHZ)
746                r |= RATE_INFO_BW_10 << STA_STATS_RATE_BW_SHIFT;
747        else if (s->flag & RX_FLAG_5MHZ)
748                r |= RATE_INFO_BW_5 << STA_STATS_RATE_BW_SHIFT;
749        else
750                r |= RATE_INFO_BW_20 << STA_STATS_RATE_BW_SHIFT;
751
752        if (s->flag & RX_FLAG_SHORT_GI)
753                r |= STA_STATS_RATE_SGI;
754
755        if (s->flag & RX_FLAG_VHT)
756                r |= STA_STATS_RATE_VHT | (s->vht_nss << 4);
757        else if (s->flag & RX_FLAG_HT)
758                r |= STA_STATS_RATE_HT;
759        else
760                r |= STA_STATS_RATE_LEGACY | (s->band << 4);
761
762        return r;
763}
764
765#endif /* STA_INFO_H */
Note: See TracBrowser for help on using the repository browser.