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