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f0706e82 JB |
1 | /* |
2 | * Copyright 2002-2005, Devicescape Software, Inc. | |
d98ad83e | 3 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
da6a4352 | 4 | * Copyright(c) 2015-2017 Intel Deutschland GmbH |
f0706e82 JB |
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> | |
af818581 | 17 | #include <linux/workqueue.h> |
541a45a1 | 18 | #include <linux/average.h> |
dcba665b | 19 | #include <linux/bitfield.h> |
888d04df | 20 | #include <linux/etherdevice.h> |
7bedd0cf | 21 | #include <linux/rhashtable.h> |
0f9c5a61 | 22 | #include <linux/u64_stats_sync.h> |
2c8dccc7 | 23 | #include "key.h" |
f0706e82 | 24 | |
238814fd JB |
25 | /** |
26 | * enum ieee80211_sta_info_flags - Stations flags | |
27 | * | |
c2c98fde JB |
28 | * These flags are used with &struct sta_info's @flags member, but |
29 | * only indirectly with set_sta_flag() and friends. | |
238814fd JB |
30 | * |
31 | * @WLAN_STA_AUTH: Station is authenticated. | |
32 | * @WLAN_STA_ASSOC: Station is associated. | |
af818581 | 33 | * @WLAN_STA_PS_STA: Station is in power-save mode |
238814fd JB |
34 | * @WLAN_STA_AUTHORIZED: Station is authorized to send/receive traffic. |
35 | * This bit is always checked so needs to be enabled for all stations | |
36 | * when virtual port control is not in use. | |
37 | * @WLAN_STA_SHORT_PREAMBLE: Station is capable of receiving short-preamble | |
38 | * frames. | |
238814fd | 39 | * @WLAN_STA_WDS: Station is one of our WDS peers. |
d46e144b | 40 | * @WLAN_STA_CLEAR_PS_FILT: Clear PS filter in hardware (using the |
e039fa4a | 41 | * IEEE80211_TX_CTL_CLEAR_PS_FILT control flag) when the next |
d46e144b | 42 | * frame to this station is transmitted. |
5394af4d | 43 | * @WLAN_STA_MFP: Management frame protection is used with this STA. |
618f356b | 44 | * @WLAN_STA_BLOCK_BA: Used to deny ADDBA requests (both TX and RX) |
098a6070 | 45 | * during suspend/resume and station removal. |
af818581 JB |
46 | * @WLAN_STA_PS_DRIVER: driver requires keeping this station in |
47 | * power-save mode logically to flush frames that might still | |
48 | * be in the queues | |
49 | * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping | |
50 | * station in power-save mode, reply when the driver unblocks. | |
941c93cd AN |
51 | * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. |
52 | * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct | |
53 | * packets. This means the link is enabled. | |
626911cc AN |
54 | * @WLAN_STA_TDLS_INITIATOR: We are the initiator of the TDLS link with this |
55 | * station. | |
9041c1fa | 56 | * @WLAN_STA_TDLS_CHAN_SWITCH: This TDLS peer supports TDLS channel-switching |
a7a6bdd0 AN |
57 | * @WLAN_STA_TDLS_OFF_CHANNEL: The local STA is currently off-channel with this |
58 | * TDLS peer | |
b98fb44f AN |
59 | * @WLAN_STA_TDLS_WIDER_BW: This TDLS peer supports working on a wider bw on |
60 | * the BSS base channel. | |
47086fc5 JB |
61 | * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was |
62 | * keeping station in power-save mode, reply when the driver | |
63 | * unblocks the station. | |
64 | * @WLAN_STA_SP: Station is in a service period, so don't try to | |
deeaee19 | 65 | * reply to other uAPSD trigger frames or PS-Poll. |
e7f4a940 | 66 | * @WLAN_STA_4ADDR_EVENT: 4-addr event was already sent for this frame. |
83d5cc01 | 67 | * @WLAN_STA_INSERTED: This station is inserted into the hash table. |
e1936e94 | 68 | * @WLAN_STA_RATE_CONTROL: rate control was initialized for this station. |
dbf498fb | 69 | * @WLAN_STA_TOFFSET_KNOWN: toffset calculated for this station is valid. |
3f52b7e3 MP |
70 | * @WLAN_STA_MPSP_OWNER: local STA is owner of a mesh Peer Service Period. |
71 | * @WLAN_STA_MPSP_RECIPIENT: local STA is recipient of a MPSP. | |
5ac2e350 JB |
72 | * @WLAN_STA_PS_DELIVER: station woke up, but we're still blocking TX |
73 | * until pending frames are delivered | |
c84387d2 JB |
74 | * |
75 | * @NUM_WLAN_STA_FLAGS: number of defined flags | |
238814fd JB |
76 | */ |
77 | enum ieee80211_sta_info_flags { | |
c2c98fde JB |
78 | WLAN_STA_AUTH, |
79 | WLAN_STA_ASSOC, | |
80 | WLAN_STA_PS_STA, | |
81 | WLAN_STA_AUTHORIZED, | |
82 | WLAN_STA_SHORT_PREAMBLE, | |
c2c98fde JB |
83 | WLAN_STA_WDS, |
84 | WLAN_STA_CLEAR_PS_FILT, | |
85 | WLAN_STA_MFP, | |
86 | WLAN_STA_BLOCK_BA, | |
87 | WLAN_STA_PS_DRIVER, | |
88 | WLAN_STA_PSPOLL, | |
89 | WLAN_STA_TDLS_PEER, | |
90 | WLAN_STA_TDLS_PEER_AUTH, | |
626911cc | 91 | WLAN_STA_TDLS_INITIATOR, |
9041c1fa | 92 | WLAN_STA_TDLS_CHAN_SWITCH, |
a7a6bdd0 | 93 | WLAN_STA_TDLS_OFF_CHANNEL, |
b98fb44f | 94 | WLAN_STA_TDLS_WIDER_BW, |
c2c98fde JB |
95 | WLAN_STA_UAPSD, |
96 | WLAN_STA_SP, | |
e7f4a940 | 97 | WLAN_STA_4ADDR_EVENT, |
83d5cc01 | 98 | WLAN_STA_INSERTED, |
e1936e94 | 99 | WLAN_STA_RATE_CONTROL, |
dbf498fb | 100 | WLAN_STA_TOFFSET_KNOWN, |
3f52b7e3 MP |
101 | WLAN_STA_MPSP_OWNER, |
102 | WLAN_STA_MPSP_RECIPIENT, | |
5ac2e350 | 103 | WLAN_STA_PS_DELIVER, |
c84387d2 JB |
104 | |
105 | NUM_WLAN_STA_FLAGS, | |
238814fd | 106 | }; |
d9a7ddb0 | 107 | |
5aae2880 | 108 | #define ADDBA_RESP_INTERVAL HZ |
84381b4e NM |
109 | #define HT_AGG_MAX_RETRIES 15 |
110 | #define HT_AGG_BURST_RETRIES 3 | |
111 | #define HT_AGG_RETRIES_PERIOD (15 * HZ) | |
5aae2880 | 112 | |
a622ab72 JB |
113 | #define HT_AGG_STATE_DRV_READY 0 |
114 | #define HT_AGG_STATE_RESPONSE_RECEIVED 1 | |
115 | #define HT_AGG_STATE_OPERATIONAL 2 | |
116 | #define HT_AGG_STATE_STOPPING 3 | |
0ab33703 JB |
117 | #define HT_AGG_STATE_WANT_START 4 |
118 | #define HT_AGG_STATE_WANT_STOP 5 | |
7a7c0a64 JB |
119 | #define HT_AGG_STATE_START_CB 6 |
120 | #define HT_AGG_STATE_STOP_CB 7 | |
80656c20 | 121 | |
c82c4a80 JB |
122 | enum ieee80211_agg_stop_reason { |
123 | AGG_STOP_DECLINED, | |
124 | AGG_STOP_LOCAL_REQUEST, | |
125 | AGG_STOP_PEER_REQUEST, | |
126 | AGG_STOP_DESTROY_STA, | |
127 | }; | |
128 | ||
80656c20 RR |
129 | /** |
130 | * struct tid_ampdu_tx - TID aggregation information (Tx). | |
131 | * | |
a622ab72 | 132 | * @rcu_head: rcu head for freeing structure |
285fa695 | 133 | * @session_timer: check if we keep Tx-ing on the TID (by timeout value) |
80656c20 | 134 | * @addba_resp_timer: timer for peer's response to addba request |
cd8ffc80 | 135 | * @pending: pending frames queue -- use sta's spinlock to protect |
cee24a3e | 136 | * @dialog_token: dialog token for aggregation session |
bd2ce6e4 | 137 | * @timeout: session timeout value to be filled in ADDBA requests |
a622ab72 | 138 | * @state: session state (see above) |
12d3952f | 139 | * @last_tx: jiffies of last tx activity |
a622ab72 | 140 | * @stop_initiator: initiator of a session stop |
53f73c09 | 141 | * @tx_stop: TX DelBA frame when stopping |
0b01f030 | 142 | * @buf_size: reorder buffer size at receiver |
f0425bed FF |
143 | * @failed_bar_ssn: ssn of the last failed BAR tx attempt |
144 | * @bar_pending: BAR needs to be re-sent | |
e3abc8ff | 145 | * @amsdu: support A-MSDU withing A-MDPU |
a622ab72 | 146 | * |
dd318575 JB |
147 | * This structure's lifetime is managed by RCU, assignments to |
148 | * the array holding it must hold the aggregation mutex. | |
149 | * | |
150 | * The TX path can access it under RCU lock-free if, and | |
151 | * only if, the state has the flag %HT_AGG_STATE_OPERATIONAL | |
152 | * set. Otherwise, the TX path must also acquire the spinlock | |
153 | * and re-check the state, see comments in the tx code | |
154 | * touching it. | |
80656c20 RR |
155 | */ |
156 | struct tid_ampdu_tx { | |
a622ab72 | 157 | struct rcu_head rcu_head; |
285fa695 | 158 | struct timer_list session_timer; |
80656c20 | 159 | struct timer_list addba_resp_timer; |
cd8ffc80 | 160 | struct sk_buff_head pending; |
a622ab72 | 161 | unsigned long state; |
12d3952f | 162 | unsigned long last_tx; |
bd2ce6e4 | 163 | u16 timeout; |
cee24a3e | 164 | u8 dialog_token; |
a622ab72 | 165 | u8 stop_initiator; |
53f73c09 | 166 | bool tx_stop; |
0b01f030 | 167 | u8 buf_size; |
f0425bed FF |
168 | |
169 | u16 failed_bar_ssn; | |
170 | bool bar_pending; | |
e3abc8ff | 171 | bool amsdu; |
80656c20 | 172 | }; |
5aae2880 RR |
173 | |
174 | /** | |
175 | * struct tid_ampdu_rx - TID aggregation information (Rx). | |
176 | * | |
83eb935e MK |
177 | * @reorder_buf: buffer to reorder incoming aggregated MPDUs. An MPDU may be an |
178 | * A-MSDU with individually reported subframes. | |
06470f74 SS |
179 | * @reorder_buf_filtered: bitmap indicating where there are filtered frames in |
180 | * the reorder buffer that should be ignored when releasing frames | |
4d050f1d | 181 | * @reorder_time: jiffies when skb was added |
5aae2880 | 182 | * @session_timer: check if peer keeps Tx-ing on the TID (by timeout value) |
2bff8ebf | 183 | * @reorder_timer: releases expired frames from the reorder buffer. |
12d3952f | 184 | * @last_rx: jiffies of last rx activity |
056cdd59 JB |
185 | * @head_seq_num: head sequence number in reordering buffer. |
186 | * @stored_mpdu_num: number of MPDUs in reordering buffer | |
cee24a3e RR |
187 | * @ssn: Starting Sequence Number expected to be aggregated. |
188 | * @buf_size: buffer size for incoming A-MPDUs | |
20ad19d0 | 189 | * @timeout: reset timer value (in TUs). |
a87f736d | 190 | * @rcu_head: RCU head used for freeing this struct |
2bff8ebf | 191 | * @reorder_lock: serializes access to reorder buffer, see below. |
4549cf2b MK |
192 | * @auto_seq: used for offloaded BA sessions to automatically pick head_seq_and |
193 | * and ssn. | |
788211d8 | 194 | * @removed: this session is removed (but might have been found due to RCU) |
b7540d8f | 195 | * @started: this session has started (head ssn or higher was received) |
a87f736d | 196 | * |
dd318575 JB |
197 | * This structure's lifetime is managed by RCU, assignments to |
198 | * the array holding it must hold the aggregation mutex. | |
2bff8ebf | 199 | * |
dd318575 JB |
200 | * The @reorder_lock is used to protect the members of this |
201 | * struct, except for @timeout, @buf_size and @dialog_token, | |
202 | * which are constant across the lifetime of the struct (the | |
203 | * dialog token being used only for debugging). | |
5aae2880 RR |
204 | */ |
205 | struct tid_ampdu_rx { | |
a87f736d | 206 | struct rcu_head rcu_head; |
2bff8ebf | 207 | spinlock_t reorder_lock; |
06470f74 | 208 | u64 reorder_buf_filtered; |
83eb935e | 209 | struct sk_buff_head *reorder_buf; |
4d050f1d | 210 | unsigned long *reorder_time; |
5aae2880 | 211 | struct timer_list session_timer; |
2bff8ebf | 212 | struct timer_list reorder_timer; |
12d3952f | 213 | unsigned long last_rx; |
056cdd59 JB |
214 | u16 head_seq_num; |
215 | u16 stored_mpdu_num; | |
cee24a3e RR |
216 | u16 ssn; |
217 | u16 buf_size; | |
218 | u16 timeout; | |
b7540d8f SS |
219 | u8 auto_seq:1, |
220 | removed:1, | |
221 | started:1; | |
5aae2880 RR |
222 | }; |
223 | ||
fcea6007 JB |
224 | /** |
225 | * struct sta_ampdu_mlme - STA aggregation information. | |
226 | * | |
412a6d80 SS |
227 | * @mtx: mutex to protect all TX data (except non-NULL assignments |
228 | * to tid_tx[idx], which are protected by the sta spinlock) | |
229 | * tid_start_tx is also protected by sta->lock. | |
a87f736d | 230 | * @tid_rx: aggregation info for Rx per TID -- RCU protected |
1c3d185a | 231 | * @tid_rx_token: dialog tokens for valid aggregation sessions |
7c3b1dd8 JB |
232 | * @tid_rx_timer_expired: bitmap indicating on which TIDs the |
233 | * RX timer expired until the work for it runs | |
f41ccd71 SL |
234 | * @tid_rx_stop_requested: bitmap indicating which BA sessions per TID the |
235 | * driver requested to close until the work for it runs | |
412a6d80 | 236 | * @agg_session_valid: bitmap indicating which TID has a rx BA session open on |
bfe40fa3 JB |
237 | * @unexpected_agg: bitmap indicating which TID already sent a delBA due to |
238 | * unexpected aggregation related frames outside a session | |
412a6d80 SS |
239 | * @work: work struct for starting/stopping aggregation |
240 | * @tid_tx: aggregation info for Tx per TID | |
241 | * @tid_start_tx: sessions where start was requested | |
242 | * @last_addba_req_time: timestamp of the last addBA request. | |
243 | * @addba_req_num: number of times addBA request has been sent. | |
244 | * @dialog_token_allocator: dialog token enumerator for each new session; | |
fcea6007 JB |
245 | */ |
246 | struct sta_ampdu_mlme { | |
a93e3644 | 247 | struct mutex mtx; |
fcea6007 | 248 | /* rx */ |
5a306f58 | 249 | struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; |
1c3d185a | 250 | u8 tid_rx_token[IEEE80211_NUM_TIDS]; |
5a306f58 JB |
251 | unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; |
252 | unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; | |
412a6d80 | 253 | unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; |
bfe40fa3 | 254 | unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; |
fcea6007 | 255 | /* tx */ |
0ab33703 | 256 | struct work_struct work; |
5a306f58 JB |
257 | struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; |
258 | struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; | |
259 | unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; | |
260 | u8 addba_req_num[IEEE80211_NUM_TIDS]; | |
fcea6007 JB |
261 | u8 dialog_token_allocator; |
262 | }; | |
263 | ||
264 | ||
b6da911b LK |
265 | /* Value to indicate no TID reservation */ |
266 | #define IEEE80211_TID_UNRESERVED 0xff | |
267 | ||
e495c247 JB |
268 | #define IEEE80211_FAST_XMIT_MAX_IV 18 |
269 | ||
17c18bf8 JB |
270 | /** |
271 | * struct ieee80211_fast_tx - TX fastpath information | |
272 | * @key: key to use for hw crypto | |
273 | * @hdr: the 802.11 header to put with the frame | |
274 | * @hdr_len: actual 802.11 header length | |
275 | * @sa_offs: offset of the SA | |
276 | * @da_offs: offset of the DA | |
277 | * @pn_offs: offset where to put PN for crypto (or 0 if not needed) | |
278 | * @band: band this will be transmitted on, for tx_info | |
279 | * @rcu_head: RCU head to free this struct | |
280 | * | |
e495c247 JB |
281 | * This struct is small enough so that the common case (maximum crypto |
282 | * header length of 8 like for CCMP/GCMP) fits into a single 64-byte | |
283 | * cache line. | |
17c18bf8 JB |
284 | */ |
285 | struct ieee80211_fast_tx { | |
286 | struct ieee80211_key *key; | |
17c18bf8 JB |
287 | u8 hdr_len; |
288 | u8 sa_offs, da_offs, pn_offs; | |
289 | u8 band; | |
e495c247 | 290 | u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + |
6fe04128 | 291 | sizeof(rfc1042_header)] __aligned(2); |
17c18bf8 JB |
292 | |
293 | struct rcu_head rcu_head; | |
294 | }; | |
295 | ||
49ddf8e6 JB |
296 | /** |
297 | * struct ieee80211_fast_rx - RX fastpath information | |
298 | * @dev: netdevice for reporting the SKB | |
299 | * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) | |
300 | * @vif_addr: interface address | |
301 | * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) | |
302 | * @control_port_protocol: control port protocol copied from sdata | |
303 | * @expected_ds_bits: from/to DS bits expected | |
304 | * @icv_len: length of the MIC if present | |
305 | * @key: bool indicating encryption is expected (key is set) | |
306 | * @sta_notify: notify the MLME code (once) | |
307 | * @internal_forward: forward froms internally on AP/VLAN type interfaces | |
c9c5962b | 308 | * @uses_rss: copy of USES_RSS hw flag |
49ddf8e6 JB |
309 | * @da_offs: offset of the DA in the header (for header conversion) |
310 | * @sa_offs: offset of the SA in the header (for header conversion) | |
311 | * @rcu_head: RCU head for freeing this structure | |
312 | */ | |
313 | struct ieee80211_fast_rx { | |
314 | struct net_device *dev; | |
315 | enum nl80211_iftype vif_type; | |
316 | u8 vif_addr[ETH_ALEN] __aligned(2); | |
317 | u8 rfc1042_hdr[6] __aligned(2); | |
318 | __be16 control_port_protocol; | |
319 | __le16 expected_ds_bits; | |
320 | u8 icv_len; | |
321 | u8 key:1, | |
322 | sta_notify:1, | |
c9c5962b JB |
323 | internal_forward:1, |
324 | uses_rss:1; | |
49ddf8e6 JB |
325 | u8 da_offs, sa_offs; |
326 | ||
327 | struct rcu_head rcu_head; | |
328 | }; | |
329 | ||
3eb0928f MR |
330 | /* we use only values in the range 0-100, so pick a large precision */ |
331 | DECLARE_EWMA(mesh_fail_avg, 20, 8) | |
332 | ||
433f5bc1 JB |
333 | /** |
334 | * struct mesh_sta - mesh STA information | |
335 | * @plink_lock: serialize access to plink fields | |
336 | * @llid: Local link ID | |
337 | * @plid: Peer link ID | |
a69bd8e6 | 338 | * @aid: local aid supplied by peer |
433f5bc1 JB |
339 | * @reason: Cancel reason on PLINK_HOLDING state |
340 | * @plink_retries: Retries in establishment | |
341 | * @plink_state: peer link state | |
342 | * @plink_timeout: timeout of peer link | |
343 | * @plink_timer: peer link watch timer | |
344 | * @t_offset: timing offset relative to this host | |
345 | * @t_offset_setpoint: reference timing offset of this sta to be used when | |
346 | * calculating clockdrift | |
347 | * @local_pm: local link-specific power save mode | |
348 | * @peer_pm: peer-specific power save mode towards local STA | |
349 | * @nonpeer_pm: STA power save mode towards non-peer neighbors | |
350 | * @processed_beacon: set to true after peer rates and capabilities are | |
351 | * processed | |
a76d5e0a | 352 | * @fail_avg: moving percentage of failed MSDUs |
433f5bc1 JB |
353 | */ |
354 | struct mesh_sta { | |
355 | struct timer_list plink_timer; | |
356 | ||
357 | s64 t_offset; | |
358 | s64 t_offset_setpoint; | |
359 | ||
360 | spinlock_t plink_lock; | |
361 | u16 llid; | |
362 | u16 plid; | |
a69bd8e6 | 363 | u16 aid; |
433f5bc1 JB |
364 | u16 reason; |
365 | u8 plink_retries; | |
366 | ||
367 | bool processed_beacon; | |
368 | ||
369 | enum nl80211_plink_state plink_state; | |
370 | u32 plink_timeout; | |
371 | ||
372 | /* mesh power save */ | |
373 | enum nl80211_mesh_power_mode local_pm; | |
374 | enum nl80211_mesh_power_mode peer_pm; | |
375 | enum nl80211_mesh_power_mode nonpeer_pm; | |
a76d5e0a JB |
376 | |
377 | /* moving percentage of failed MSDUs */ | |
3eb0928f | 378 | struct ewma_mesh_fail_avg fail_avg; |
433f5bc1 JB |
379 | }; |
380 | ||
eb1e011a | 381 | DECLARE_EWMA(signal, 10, 8) |
40d9a38a | 382 | |
c9c5962b JB |
383 | struct ieee80211_sta_rx_stats { |
384 | unsigned long packets; | |
385 | unsigned long last_rx; | |
386 | unsigned long num_duplicates; | |
387 | unsigned long fragments; | |
388 | unsigned long dropped; | |
389 | int last_signal; | |
390 | u8 chains; | |
391 | s8 chain_signal_last[IEEE80211_MAX_CHAINS]; | |
392 | u16 last_rate; | |
393 | struct u64_stats_sync syncp; | |
394 | u64 bytes; | |
395 | u64 msdu[IEEE80211_NUM_TIDS + 1]; | |
396 | }; | |
397 | ||
484a54c2 THJ |
398 | /** |
399 | * The bandwidth threshold below which the per-station CoDel parameters will be | |
400 | * scaled to be more lenient (to prevent starvation of slow stations). This | |
401 | * value will be scaled by the number of active stations when it is being | |
402 | * applied. | |
403 | */ | |
404 | #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ | |
405 | ||
693b1bbc JB |
406 | /** |
407 | * struct sta_info - STA information | |
408 | * | |
409 | * This structure collects information about a station that | |
410 | * mac80211 is communicating with. | |
411 | * | |
412 | * @list: global linked list entry | |
d778207b | 413 | * @free_list: list entry for keeping track of stations to free |
7bedd0cf | 414 | * @hash_node: hash node for rhashtable |
ac100ce5 JB |
415 | * @addr: station's MAC address - duplicated from public part to |
416 | * let the hash table work with just a single cacheline | |
693b1bbc | 417 | * @local: pointer to the global information |
e25cf4a6 | 418 | * @sdata: virtual interface this station belongs to |
2475b1cc MS |
419 | * @ptk: peer keys negotiated with this station, if any |
420 | * @ptk_idx: last installed peer key index | |
e31b8213 | 421 | * @gtk: group keys negotiated with this station, if any |
e25cf4a6 | 422 | * @rate_ctrl: rate control algorithm reference |
bbbe8c8c JB |
423 | * @rate_ctrl_lock: spinlock used to protect rate control data |
424 | * (data inside the algorithm, so serializes calls there) | |
e25cf4a6 | 425 | * @rate_ctrl_priv: rate control private per-STA pointer |
6ef307bc RD |
426 | * @lock: used for locking all fields that require locking, see comments |
427 | * in the header file. | |
5ac2e350 | 428 | * @drv_deliver_wk: used for delivering frames after driver PS unblocking |
e25cf4a6 | 429 | * @listen_interval: listen interval of this station, when we're acting as AP |
c2c98fde | 430 | * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly |
1d147bfa | 431 | * @ps_lock: used for powersave (when mac80211 is the AP) related locking |
948d887d JB |
432 | * @ps_tx_buf: buffers (per AC) of frames to transmit to this station |
433 | * when it leaves power saving state or polls | |
434 | * @tx_filtered: buffers (per AC) of frames we already tried to | |
435 | * transmit but were filtered by hardware due to STA having | |
436 | * entered power saving state, these are also delivered to | |
437 | * the station when it leaves powersave or polls for frames | |
438 | * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on | |
ba8c3d6f | 439 | * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on |
ebe27c91 | 440 | * @last_connected: time (in seconds) when a station got connected |
798a457d JB |
441 | * @last_seq_ctrl: last received seq/frag number from this STA (per TID |
442 | * plus one for non-QoS frames) | |
e25cf4a6 JB |
443 | * @tid_seq: per-TID sequence numbers for sending to this STA |
444 | * @ampdu_mlme: A-MPDU state machine state | |
6ef307bc | 445 | * @timer_to_tid: identity mapping to ID timers |
433f5bc1 | 446 | * @mesh: mesh STA information |
fc4a25c5 | 447 | * @debugfs_dir: debug filesystem directory dentry |
af818581 | 448 | * @dead: set to true when sta is unlinked |
ef044763 | 449 | * @removed: set to true when sta is being removed from sta_list |
34e89507 | 450 | * @uploaded: set to true when sta is uploaded to the driver |
2a33bee2 | 451 | * @sta: station information we share with the driver |
d9a7ddb0 | 452 | * @sta_state: duplicates information about station state (for debug) |
077f897a | 453 | * @rcu_head: RCU head used for freeing this station struct |
0af83d3d JB |
454 | * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, |
455 | * taken from HT/VHT capabilities or VHT operating mode notification | |
687da132 EG |
456 | * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for |
457 | * AP only. | |
2475b1cc | 458 | * @cipher_scheme: optional cipher scheme for this station |
484a54c2 | 459 | * @cparams: CoDel parameters for this station. |
b6da911b | 460 | * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) |
17c18bf8 | 461 | * @fast_tx: TX fastpath information |
49ddf8e6 | 462 | * @fast_rx: RX fastpath information |
0fabfaaf AN |
463 | * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to |
464 | * the BSS one. | |
e5a9f8d0 JB |
465 | * @tx_stats: TX statistics |
466 | * @rx_stats: RX statistics | |
c9c5962b JB |
467 | * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs |
468 | * this (by advertising the USES_RSS hw flag) | |
e5a9f8d0 | 469 | * @status_stats: TX status statistics |
693b1bbc | 470 | */ |
f0706e82 | 471 | struct sta_info { |
693b1bbc | 472 | /* General information, mostly static */ |
d778207b | 473 | struct list_head list, free_list; |
b22cfcfc | 474 | struct rcu_head rcu_head; |
83e7e4ce | 475 | struct rhlist_head hash_node; |
ac100ce5 | 476 | u8 addr[ETH_ALEN]; |
f0706e82 | 477 | struct ieee80211_local *local; |
d0709a65 | 478 | struct ieee80211_sub_if_data *sdata; |
40b275b6 | 479 | struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; |
2475b1cc | 480 | struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; |
2475b1cc | 481 | u8 ptk_idx; |
f0706e82 JB |
482 | struct rate_control_ref *rate_ctrl; |
483 | void *rate_ctrl_priv; | |
35c347ac | 484 | spinlock_t rate_ctrl_lock; |
07346f81 | 485 | spinlock_t lock; |
17741cdc | 486 | |
17c18bf8 | 487 | struct ieee80211_fast_tx __rcu *fast_tx; |
49ddf8e6 | 488 | struct ieee80211_fast_rx __rcu *fast_rx; |
c9c5962b | 489 | struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; |
17c18bf8 | 490 | |
433f5bc1 JB |
491 | #ifdef CONFIG_MAC80211_MESH |
492 | struct mesh_sta *mesh; | |
493 | #endif | |
494 | ||
5ac2e350 | 495 | struct work_struct drv_deliver_wk; |
af818581 | 496 | |
693b1bbc | 497 | u16 listen_interval; |
f0706e82 | 498 | |
af818581 | 499 | bool dead; |
ef044763 | 500 | bool removed; |
af818581 | 501 | |
34e89507 | 502 | bool uploaded; |
693b1bbc | 503 | |
d9a7ddb0 JB |
504 | enum ieee80211_sta_state sta_state; |
505 | ||
c2c98fde JB |
506 | /* use the accessors defined below */ |
507 | unsigned long _flags; | |
693b1bbc | 508 | |
1d147bfa EG |
509 | /* STA powersave lock and frame queues */ |
510 | spinlock_t ps_lock; | |
948d887d JB |
511 | struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; |
512 | struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; | |
513 | unsigned long driver_buffered_tids; | |
ba8c3d6f | 514 | unsigned long txq_buffered_tids; |
693b1bbc | 515 | |
ebe27c91 | 516 | long last_connected; |
ef0621e8 | 517 | |
e5a9f8d0 | 518 | /* Updated from RX path only, no locking requirements */ |
c9c5962b | 519 | struct ieee80211_sta_rx_stats rx_stats; |
0be6ed13 JB |
520 | struct { |
521 | struct ewma_signal signal; | |
522 | struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; | |
523 | } rx_stats_avg; | |
ef0621e8 | 524 | |
9e26297a | 525 | /* Plus 1 for non-QoS frames */ |
5a306f58 | 526 | __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; |
693b1bbc JB |
527 | |
528 | /* Updated from TX status path only, no locking requirements */ | |
e5a9f8d0 JB |
529 | struct { |
530 | unsigned long filtered; | |
531 | unsigned long retry_failed, retry_count; | |
532 | unsigned int lost_packets; | |
533 | unsigned long last_tdls_pkt_time; | |
534 | u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; | |
535 | u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; | |
b8da6b6a | 536 | unsigned long last_ack; |
e5a9f8d0 | 537 | } status_stats; |
693b1bbc JB |
538 | |
539 | /* Updated from TX path only, no locking requirements */ | |
e5a9f8d0 JB |
540 | struct { |
541 | u64 packets[IEEE80211_NUM_ACS]; | |
542 | u64 bytes[IEEE80211_NUM_ACS]; | |
543 | struct ieee80211_tx_rate last_rate; | |
544 | u64 msdu[IEEE80211_NUM_TIDS + 1]; | |
545 | } tx_stats; | |
f591fa5d | 546 | u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; |
f0706e82 | 547 | |
d0709a65 | 548 | /* |
07346f81 | 549 | * Aggregation information, locked with lock. |
d0709a65 | 550 | */ |
5aae2880 | 551 | struct sta_ampdu_mlme ampdu_mlme; |
5a306f58 | 552 | u8 timer_to_tid[IEEE80211_NUM_TIDS]; |
693b1bbc | 553 | |
e9f207f0 | 554 | #ifdef CONFIG_MAC80211_DEBUGFS |
fc4a25c5 | 555 | struct dentry *debugfs_dir; |
e9f207f0 | 556 | #endif |
17741cdc | 557 | |
0af83d3d JB |
558 | enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; |
559 | ||
687da132 | 560 | enum ieee80211_smps_mode known_smps_mode; |
2475b1cc | 561 | const struct ieee80211_cipher_scheme *cipher_scheme; |
687da132 | 562 | |
484a54c2 THJ |
563 | struct codel_params cparams; |
564 | ||
b6da911b LK |
565 | u8 reserved_tid; |
566 | ||
0fabfaaf AN |
567 | struct cfg80211_chan_def tdls_chandef; |
568 | ||
17741cdc JB |
569 | /* keep last! */ |
570 | struct ieee80211_sta sta; | |
f0706e82 JB |
571 | }; |
572 | ||
57cf8043 | 573 | static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) |
d6d1a5a7 JB |
574 | { |
575 | #ifdef CONFIG_MAC80211_MESH | |
433f5bc1 | 576 | return sta->mesh->plink_state; |
d6d1a5a7 | 577 | #endif |
57cf8043 | 578 | return NL80211_PLINK_LISTEN; |
d6d1a5a7 JB |
579 | } |
580 | ||
c2c98fde JB |
581 | static inline void set_sta_flag(struct sta_info *sta, |
582 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 583 | { |
d9a7ddb0 JB |
584 | WARN_ON(flag == WLAN_STA_AUTH || |
585 | flag == WLAN_STA_ASSOC || | |
586 | flag == WLAN_STA_AUTHORIZED); | |
c2c98fde | 587 | set_bit(flag, &sta->_flags); |
07346f81 JB |
588 | } |
589 | ||
c2c98fde JB |
590 | static inline void clear_sta_flag(struct sta_info *sta, |
591 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 592 | { |
d9a7ddb0 JB |
593 | WARN_ON(flag == WLAN_STA_AUTH || |
594 | flag == WLAN_STA_ASSOC || | |
595 | flag == WLAN_STA_AUTHORIZED); | |
c2c98fde | 596 | clear_bit(flag, &sta->_flags); |
07346f81 JB |
597 | } |
598 | ||
c2c98fde JB |
599 | static inline int test_sta_flag(struct sta_info *sta, |
600 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 601 | { |
c2c98fde | 602 | return test_bit(flag, &sta->_flags); |
07346f81 JB |
603 | } |
604 | ||
c2c98fde JB |
605 | static inline int test_and_clear_sta_flag(struct sta_info *sta, |
606 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 607 | { |
d9a7ddb0 JB |
608 | WARN_ON(flag == WLAN_STA_AUTH || |
609 | flag == WLAN_STA_ASSOC || | |
610 | flag == WLAN_STA_AUTHORIZED); | |
c2c98fde | 611 | return test_and_clear_bit(flag, &sta->_flags); |
07346f81 JB |
612 | } |
613 | ||
e7f4a940 JB |
614 | static inline int test_and_set_sta_flag(struct sta_info *sta, |
615 | enum ieee80211_sta_info_flags flag) | |
616 | { | |
d9a7ddb0 JB |
617 | WARN_ON(flag == WLAN_STA_AUTH || |
618 | flag == WLAN_STA_ASSOC || | |
619 | flag == WLAN_STA_AUTHORIZED); | |
e7f4a940 JB |
620 | return test_and_set_bit(flag, &sta->_flags); |
621 | } | |
622 | ||
83d5cc01 JB |
623 | int sta_info_move_state(struct sta_info *sta, |
624 | enum ieee80211_sta_state new_state); | |
d9a7ddb0 | 625 | |
83d5cc01 JB |
626 | static inline void sta_info_pre_move_state(struct sta_info *sta, |
627 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 628 | { |
83d5cc01 JB |
629 | int ret; |
630 | ||
631 | WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); | |
632 | ||
633 | ret = sta_info_move_state(sta, new_state); | |
d9a7ddb0 JB |
634 | WARN_ON_ONCE(ret); |
635 | } | |
636 | ||
637 | ||
ec034b20 JB |
638 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
639 | struct tid_ampdu_tx *tid_tx); | |
f0706e82 | 640 | |
40b275b6 JB |
641 | static inline struct tid_ampdu_tx * |
642 | rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) | |
643 | { | |
644 | return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], | |
645 | lockdep_is_held(&sta->lock) || | |
646 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
647 | } | |
f0706e82 | 648 | |
948d887d JB |
649 | /* Maximum number of frames to buffer per power saving station per AC */ |
650 | #define STA_MAX_TX_BUFFER 64 | |
f0706e82 JB |
651 | |
652 | /* Minimum buffered frame expiry time. If STA uses listen interval that is | |
653 | * smaller than this value, the minimum value here is used instead. */ | |
654 | #define STA_TX_BUFFER_EXPIRE (10 * HZ) | |
655 | ||
656 | /* How often station data is cleaned up (e.g., expiration of buffered frames) | |
657 | */ | |
658 | #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) | |
659 | ||
83e7e4ce HX |
660 | struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, |
661 | const u8 *addr); | |
662 | ||
d0709a65 | 663 | /* |
abe60632 | 664 | * Get a STA info, must be under RCU read lock. |
d0709a65 | 665 | */ |
abe60632 JB |
666 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
667 | const u8 *addr); | |
668 | ||
0e5ded5a FF |
669 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, |
670 | const u8 *addr); | |
671 | ||
83e7e4ce HX |
672 | #define for_each_sta_info(local, _addr, _sta, _tmp) \ |
673 | rhl_for_each_entry_rcu(_sta, _tmp, \ | |
674 | sta_info_hash_lookup(local, _addr), hash_node) | |
abe60632 | 675 | |
d0709a65 JB |
676 | /* |
677 | * Get STA info by index, BROKEN! | |
678 | */ | |
3b53fde8 JB |
679 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
680 | int idx); | |
d0709a65 | 681 | /* |
73651ee6 JB |
682 | * Create a new STA info, caller owns returned structure |
683 | * until sta_info_insert(). | |
d0709a65 | 684 | */ |
73651ee6 | 685 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 686 | const u8 *addr, gfp_t gfp); |
d9a7ddb0 JB |
687 | |
688 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); | |
689 | ||
73651ee6 JB |
690 | /* |
691 | * Insert STA info into hash table/list, returns zero or a | |
692 | * -EEXIST if (if the same MAC address is already present). | |
693 | * | |
34e89507 JB |
694 | * Calling the non-rcu version makes the caller relinquish, |
695 | * the _rcu version calls read_lock_rcu() and must be called | |
696 | * without it held. | |
73651ee6 JB |
697 | */ |
698 | int sta_info_insert(struct sta_info *sta); | |
34e89507 | 699 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); |
34e89507 | 700 | |
83d5cc01 | 701 | int __must_check __sta_info_destroy(struct sta_info *sta); |
34e89507 JB |
702 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, |
703 | const u8 *addr); | |
704 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, | |
705 | const u8 *addr); | |
f0706e82 | 706 | |
c868cb35 | 707 | void sta_info_recalc_tim(struct sta_info *sta); |
004c872e | 708 | |
7bedd0cf | 709 | int sta_info_init(struct ieee80211_local *local); |
d0709a65 | 710 | void sta_info_stop(struct ieee80211_local *local); |
051007d9 JB |
711 | |
712 | /** | |
713 | * sta_info_flush - flush matching STA entries from the STA table | |
714 | * | |
715 | * Returns the number of removed STA entries. | |
716 | * | |
717 | * @sdata: sdata to remove all stations from | |
e716251d | 718 | * @vlans: if the given interface is an AP interface, also flush VLANs |
051007d9 | 719 | */ |
e716251d JB |
720 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); |
721 | ||
722 | static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) | |
723 | { | |
724 | return __sta_info_flush(sdata, false); | |
725 | } | |
051007d9 | 726 | |
6b62bf32 TP |
727 | void sta_set_rate_info_tx(struct sta_info *sta, |
728 | const struct ieee80211_tx_rate *rate, | |
729 | struct rate_info *rinfo); | |
b7ffbd7e JB |
730 | void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); |
731 | ||
3b17fbf8 MA |
732 | u32 sta_get_expected_throughput(struct sta_info *sta); |
733 | ||
24723d1b JB |
734 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
735 | unsigned long exp_time); | |
687da132 | 736 | u8 sta_info_tx_streams(struct sta_info *sta); |
d0709a65 | 737 | |
af818581 JB |
738 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); |
739 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); | |
47086fc5 | 740 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); |
af818581 | 741 | |
b8da6b6a JB |
742 | unsigned long ieee80211_sta_last_active(struct sta_info *sta); |
743 | ||
dcba665b JB |
744 | enum sta_stats_type { |
745 | STA_STATS_RATE_TYPE_INVALID = 0, | |
746 | STA_STATS_RATE_TYPE_LEGACY, | |
747 | STA_STATS_RATE_TYPE_HT, | |
748 | STA_STATS_RATE_TYPE_VHT, | |
749 | }; | |
750 | ||
751 | #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) | |
752 | #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) | |
753 | #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) | |
754 | #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) | |
755 | #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) | |
756 | #define STA_STATS_FIELD_BW GENMASK(11, 8) | |
757 | #define STA_STATS_FIELD_SGI GENMASK(12, 12) | |
758 | #define STA_STATS_FIELD_TYPE GENMASK(15, 13) | |
759 | ||
760 | #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) | |
761 | #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) | |
762 | ||
4f6b1b3d | 763 | #define STA_STATS_RATE_INVALID 0 |
dcba665b JB |
764 | |
765 | static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) | |
4f6b1b3d | 766 | { |
dcba665b | 767 | u16 r; |
4f6b1b3d | 768 | |
dcba665b | 769 | r = STA_STATS_FIELD(BW, s->bw); |
4f6b1b3d | 770 | |
7fdd69c5 | 771 | if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) |
dcba665b | 772 | r |= STA_STATS_FIELD(SGI, 1); |
4f6b1b3d | 773 | |
da6a4352 JB |
774 | switch (s->encoding) { |
775 | case RX_ENC_VHT: | |
dcba665b JB |
776 | r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); |
777 | r |= STA_STATS_FIELD(VHT_NSS, s->nss); | |
778 | r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); | |
da6a4352 JB |
779 | break; |
780 | case RX_ENC_HT: | |
dcba665b JB |
781 | r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); |
782 | r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); | |
da6a4352 | 783 | break; |
da6a4352 | 784 | case RX_ENC_LEGACY: |
dcba665b JB |
785 | r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); |
786 | r |= STA_STATS_FIELD(LEGACY_BAND, s->band); | |
787 | r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); | |
da6a4352 | 788 | break; |
dcba665b JB |
789 | default: |
790 | WARN_ON(1); | |
791 | return STA_STATS_RATE_INVALID; | |
da6a4352 | 792 | } |
4f6b1b3d JB |
793 | |
794 | return r; | |
795 | } | |
796 | ||
f0706e82 | 797 | #endif /* STA_INFO_H */ |