Commit | Line | Data |
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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 | |
699cb58c JB |
236 | * @tid_rx_manage_offl: bitmap indicating which BA sessions were requested |
237 | * to be treated as started/stopped due to offloading | |
412a6d80 | 238 | * @agg_session_valid: bitmap indicating which TID has a rx BA session open on |
bfe40fa3 JB |
239 | * @unexpected_agg: bitmap indicating which TID already sent a delBA due to |
240 | * unexpected aggregation related frames outside a session | |
412a6d80 SS |
241 | * @work: work struct for starting/stopping aggregation |
242 | * @tid_tx: aggregation info for Tx per TID | |
243 | * @tid_start_tx: sessions where start was requested | |
244 | * @last_addba_req_time: timestamp of the last addBA request. | |
245 | * @addba_req_num: number of times addBA request has been sent. | |
246 | * @dialog_token_allocator: dialog token enumerator for each new session; | |
fcea6007 JB |
247 | */ |
248 | struct sta_ampdu_mlme { | |
a93e3644 | 249 | struct mutex mtx; |
fcea6007 | 250 | /* rx */ |
5a306f58 | 251 | struct tid_ampdu_rx __rcu *tid_rx[IEEE80211_NUM_TIDS]; |
1c3d185a | 252 | u8 tid_rx_token[IEEE80211_NUM_TIDS]; |
5a306f58 JB |
253 | unsigned long tid_rx_timer_expired[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; |
254 | unsigned long tid_rx_stop_requested[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; | |
699cb58c | 255 | unsigned long tid_rx_manage_offl[BITS_TO_LONGS(2 * IEEE80211_NUM_TIDS)]; |
412a6d80 | 256 | unsigned long agg_session_valid[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; |
bfe40fa3 | 257 | unsigned long unexpected_agg[BITS_TO_LONGS(IEEE80211_NUM_TIDS)]; |
fcea6007 | 258 | /* tx */ |
0ab33703 | 259 | struct work_struct work; |
5a306f58 JB |
260 | struct tid_ampdu_tx __rcu *tid_tx[IEEE80211_NUM_TIDS]; |
261 | struct tid_ampdu_tx *tid_start_tx[IEEE80211_NUM_TIDS]; | |
262 | unsigned long last_addba_req_time[IEEE80211_NUM_TIDS]; | |
263 | u8 addba_req_num[IEEE80211_NUM_TIDS]; | |
fcea6007 JB |
264 | u8 dialog_token_allocator; |
265 | }; | |
266 | ||
267 | ||
b6da911b LK |
268 | /* Value to indicate no TID reservation */ |
269 | #define IEEE80211_TID_UNRESERVED 0xff | |
270 | ||
e495c247 JB |
271 | #define IEEE80211_FAST_XMIT_MAX_IV 18 |
272 | ||
17c18bf8 JB |
273 | /** |
274 | * struct ieee80211_fast_tx - TX fastpath information | |
275 | * @key: key to use for hw crypto | |
276 | * @hdr: the 802.11 header to put with the frame | |
277 | * @hdr_len: actual 802.11 header length | |
278 | * @sa_offs: offset of the SA | |
279 | * @da_offs: offset of the DA | |
280 | * @pn_offs: offset where to put PN for crypto (or 0 if not needed) | |
281 | * @band: band this will be transmitted on, for tx_info | |
282 | * @rcu_head: RCU head to free this struct | |
283 | * | |
e495c247 JB |
284 | * This struct is small enough so that the common case (maximum crypto |
285 | * header length of 8 like for CCMP/GCMP) fits into a single 64-byte | |
286 | * cache line. | |
17c18bf8 JB |
287 | */ |
288 | struct ieee80211_fast_tx { | |
289 | struct ieee80211_key *key; | |
17c18bf8 JB |
290 | u8 hdr_len; |
291 | u8 sa_offs, da_offs, pn_offs; | |
292 | u8 band; | |
e495c247 | 293 | u8 hdr[30 + 2 + IEEE80211_FAST_XMIT_MAX_IV + |
6fe04128 | 294 | sizeof(rfc1042_header)] __aligned(2); |
17c18bf8 JB |
295 | |
296 | struct rcu_head rcu_head; | |
297 | }; | |
298 | ||
49ddf8e6 JB |
299 | /** |
300 | * struct ieee80211_fast_rx - RX fastpath information | |
301 | * @dev: netdevice for reporting the SKB | |
302 | * @vif_type: (P2P-less) interface type of the original sdata (sdata->vif.type) | |
303 | * @vif_addr: interface address | |
304 | * @rfc1042_hdr: copy of the RFC 1042 SNAP header (to have in cache) | |
305 | * @control_port_protocol: control port protocol copied from sdata | |
306 | * @expected_ds_bits: from/to DS bits expected | |
307 | * @icv_len: length of the MIC if present | |
308 | * @key: bool indicating encryption is expected (key is set) | |
309 | * @sta_notify: notify the MLME code (once) | |
310 | * @internal_forward: forward froms internally on AP/VLAN type interfaces | |
c9c5962b | 311 | * @uses_rss: copy of USES_RSS hw flag |
49ddf8e6 JB |
312 | * @da_offs: offset of the DA in the header (for header conversion) |
313 | * @sa_offs: offset of the SA in the header (for header conversion) | |
314 | * @rcu_head: RCU head for freeing this structure | |
315 | */ | |
316 | struct ieee80211_fast_rx { | |
317 | struct net_device *dev; | |
318 | enum nl80211_iftype vif_type; | |
319 | u8 vif_addr[ETH_ALEN] __aligned(2); | |
320 | u8 rfc1042_hdr[6] __aligned(2); | |
321 | __be16 control_port_protocol; | |
322 | __le16 expected_ds_bits; | |
323 | u8 icv_len; | |
324 | u8 key:1, | |
325 | sta_notify:1, | |
c9c5962b JB |
326 | internal_forward:1, |
327 | uses_rss:1; | |
49ddf8e6 JB |
328 | u8 da_offs, sa_offs; |
329 | ||
330 | struct rcu_head rcu_head; | |
331 | }; | |
332 | ||
3eb0928f MR |
333 | /* we use only values in the range 0-100, so pick a large precision */ |
334 | DECLARE_EWMA(mesh_fail_avg, 20, 8) | |
335 | ||
433f5bc1 JB |
336 | /** |
337 | * struct mesh_sta - mesh STA information | |
338 | * @plink_lock: serialize access to plink fields | |
339 | * @llid: Local link ID | |
340 | * @plid: Peer link ID | |
a69bd8e6 | 341 | * @aid: local aid supplied by peer |
433f5bc1 JB |
342 | * @reason: Cancel reason on PLINK_HOLDING state |
343 | * @plink_retries: Retries in establishment | |
344 | * @plink_state: peer link state | |
345 | * @plink_timeout: timeout of peer link | |
346 | * @plink_timer: peer link watch timer | |
347 | * @t_offset: timing offset relative to this host | |
348 | * @t_offset_setpoint: reference timing offset of this sta to be used when | |
349 | * calculating clockdrift | |
350 | * @local_pm: local link-specific power save mode | |
351 | * @peer_pm: peer-specific power save mode towards local STA | |
352 | * @nonpeer_pm: STA power save mode towards non-peer neighbors | |
353 | * @processed_beacon: set to true after peer rates and capabilities are | |
354 | * processed | |
a76d5e0a | 355 | * @fail_avg: moving percentage of failed MSDUs |
433f5bc1 JB |
356 | */ |
357 | struct mesh_sta { | |
358 | struct timer_list plink_timer; | |
359 | ||
360 | s64 t_offset; | |
361 | s64 t_offset_setpoint; | |
362 | ||
363 | spinlock_t plink_lock; | |
364 | u16 llid; | |
365 | u16 plid; | |
a69bd8e6 | 366 | u16 aid; |
433f5bc1 JB |
367 | u16 reason; |
368 | u8 plink_retries; | |
369 | ||
370 | bool processed_beacon; | |
371 | ||
372 | enum nl80211_plink_state plink_state; | |
373 | u32 plink_timeout; | |
374 | ||
375 | /* mesh power save */ | |
376 | enum nl80211_mesh_power_mode local_pm; | |
377 | enum nl80211_mesh_power_mode peer_pm; | |
378 | enum nl80211_mesh_power_mode nonpeer_pm; | |
a76d5e0a JB |
379 | |
380 | /* moving percentage of failed MSDUs */ | |
3eb0928f | 381 | struct ewma_mesh_fail_avg fail_avg; |
433f5bc1 JB |
382 | }; |
383 | ||
eb1e011a | 384 | DECLARE_EWMA(signal, 10, 8) |
40d9a38a | 385 | |
c9c5962b JB |
386 | struct ieee80211_sta_rx_stats { |
387 | unsigned long packets; | |
388 | unsigned long last_rx; | |
389 | unsigned long num_duplicates; | |
390 | unsigned long fragments; | |
391 | unsigned long dropped; | |
392 | int last_signal; | |
393 | u8 chains; | |
394 | s8 chain_signal_last[IEEE80211_MAX_CHAINS]; | |
395 | u16 last_rate; | |
396 | struct u64_stats_sync syncp; | |
397 | u64 bytes; | |
398 | u64 msdu[IEEE80211_NUM_TIDS + 1]; | |
399 | }; | |
400 | ||
8f797c28 | 401 | /* |
484a54c2 THJ |
402 | * The bandwidth threshold below which the per-station CoDel parameters will be |
403 | * scaled to be more lenient (to prevent starvation of slow stations). This | |
404 | * value will be scaled by the number of active stations when it is being | |
405 | * applied. | |
406 | */ | |
407 | #define STA_SLOW_THRESHOLD 6000 /* 6 Mbps */ | |
408 | ||
693b1bbc JB |
409 | /** |
410 | * struct sta_info - STA information | |
411 | * | |
412 | * This structure collects information about a station that | |
413 | * mac80211 is communicating with. | |
414 | * | |
415 | * @list: global linked list entry | |
d778207b | 416 | * @free_list: list entry for keeping track of stations to free |
7bedd0cf | 417 | * @hash_node: hash node for rhashtable |
ac100ce5 JB |
418 | * @addr: station's MAC address - duplicated from public part to |
419 | * let the hash table work with just a single cacheline | |
693b1bbc | 420 | * @local: pointer to the global information |
e25cf4a6 | 421 | * @sdata: virtual interface this station belongs to |
2475b1cc MS |
422 | * @ptk: peer keys negotiated with this station, if any |
423 | * @ptk_idx: last installed peer key index | |
e31b8213 | 424 | * @gtk: group keys negotiated with this station, if any |
e25cf4a6 | 425 | * @rate_ctrl: rate control algorithm reference |
bbbe8c8c JB |
426 | * @rate_ctrl_lock: spinlock used to protect rate control data |
427 | * (data inside the algorithm, so serializes calls there) | |
e25cf4a6 | 428 | * @rate_ctrl_priv: rate control private per-STA pointer |
6ef307bc RD |
429 | * @lock: used for locking all fields that require locking, see comments |
430 | * in the header file. | |
5ac2e350 | 431 | * @drv_deliver_wk: used for delivering frames after driver PS unblocking |
e25cf4a6 | 432 | * @listen_interval: listen interval of this station, when we're acting as AP |
c2c98fde | 433 | * @_flags: STA flags, see &enum ieee80211_sta_info_flags, do not use directly |
1d147bfa | 434 | * @ps_lock: used for powersave (when mac80211 is the AP) related locking |
948d887d JB |
435 | * @ps_tx_buf: buffers (per AC) of frames to transmit to this station |
436 | * when it leaves power saving state or polls | |
437 | * @tx_filtered: buffers (per AC) of frames we already tried to | |
438 | * transmit but were filtered by hardware due to STA having | |
439 | * entered power saving state, these are also delivered to | |
440 | * the station when it leaves powersave or polls for frames | |
441 | * @driver_buffered_tids: bitmap of TIDs the driver has data buffered on | |
ba8c3d6f | 442 | * @txq_buffered_tids: bitmap of TIDs that mac80211 has txq data buffered on |
ebe27c91 | 443 | * @last_connected: time (in seconds) when a station got connected |
798a457d JB |
444 | * @last_seq_ctrl: last received seq/frag number from this STA (per TID |
445 | * plus one for non-QoS frames) | |
e25cf4a6 JB |
446 | * @tid_seq: per-TID sequence numbers for sending to this STA |
447 | * @ampdu_mlme: A-MPDU state machine state | |
6ef307bc | 448 | * @timer_to_tid: identity mapping to ID timers |
433f5bc1 | 449 | * @mesh: mesh STA information |
fc4a25c5 | 450 | * @debugfs_dir: debug filesystem directory dentry |
af818581 | 451 | * @dead: set to true when sta is unlinked |
ef044763 | 452 | * @removed: set to true when sta is being removed from sta_list |
34e89507 | 453 | * @uploaded: set to true when sta is uploaded to the driver |
2a33bee2 | 454 | * @sta: station information we share with the driver |
d9a7ddb0 | 455 | * @sta_state: duplicates information about station state (for debug) |
077f897a | 456 | * @rcu_head: RCU head used for freeing this station struct |
0af83d3d JB |
457 | * @cur_max_bandwidth: maximum bandwidth to use for TX to the station, |
458 | * taken from HT/VHT capabilities or VHT operating mode notification | |
687da132 EG |
459 | * @known_smps_mode: the smps_mode the client thinks we are in. Relevant for |
460 | * AP only. | |
2475b1cc | 461 | * @cipher_scheme: optional cipher scheme for this station |
484a54c2 | 462 | * @cparams: CoDel parameters for this station. |
b6da911b | 463 | * @reserved_tid: reserved TID (if any, otherwise IEEE80211_TID_UNRESERVED) |
17c18bf8 | 464 | * @fast_tx: TX fastpath information |
49ddf8e6 | 465 | * @fast_rx: RX fastpath information |
0fabfaaf AN |
466 | * @tdls_chandef: a TDLS peer can have a wider chandef that is compatible to |
467 | * the BSS one. | |
e5a9f8d0 JB |
468 | * @tx_stats: TX statistics |
469 | * @rx_stats: RX statistics | |
c9c5962b JB |
470 | * @pcpu_rx_stats: per-CPU RX statistics, assigned only if the driver needs |
471 | * this (by advertising the USES_RSS hw flag) | |
e5a9f8d0 | 472 | * @status_stats: TX status statistics |
693b1bbc | 473 | */ |
f0706e82 | 474 | struct sta_info { |
693b1bbc | 475 | /* General information, mostly static */ |
d778207b | 476 | struct list_head list, free_list; |
b22cfcfc | 477 | struct rcu_head rcu_head; |
83e7e4ce | 478 | struct rhlist_head hash_node; |
ac100ce5 | 479 | u8 addr[ETH_ALEN]; |
f0706e82 | 480 | struct ieee80211_local *local; |
d0709a65 | 481 | struct ieee80211_sub_if_data *sdata; |
40b275b6 | 482 | struct ieee80211_key __rcu *gtk[NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS]; |
2475b1cc | 483 | struct ieee80211_key __rcu *ptk[NUM_DEFAULT_KEYS]; |
2475b1cc | 484 | u8 ptk_idx; |
f0706e82 JB |
485 | struct rate_control_ref *rate_ctrl; |
486 | void *rate_ctrl_priv; | |
35c347ac | 487 | spinlock_t rate_ctrl_lock; |
07346f81 | 488 | spinlock_t lock; |
17741cdc | 489 | |
17c18bf8 | 490 | struct ieee80211_fast_tx __rcu *fast_tx; |
49ddf8e6 | 491 | struct ieee80211_fast_rx __rcu *fast_rx; |
c9c5962b | 492 | struct ieee80211_sta_rx_stats __percpu *pcpu_rx_stats; |
17c18bf8 | 493 | |
433f5bc1 JB |
494 | #ifdef CONFIG_MAC80211_MESH |
495 | struct mesh_sta *mesh; | |
496 | #endif | |
497 | ||
5ac2e350 | 498 | struct work_struct drv_deliver_wk; |
af818581 | 499 | |
693b1bbc | 500 | u16 listen_interval; |
f0706e82 | 501 | |
af818581 | 502 | bool dead; |
ef044763 | 503 | bool removed; |
af818581 | 504 | |
34e89507 | 505 | bool uploaded; |
693b1bbc | 506 | |
d9a7ddb0 JB |
507 | enum ieee80211_sta_state sta_state; |
508 | ||
c2c98fde JB |
509 | /* use the accessors defined below */ |
510 | unsigned long _flags; | |
693b1bbc | 511 | |
1d147bfa EG |
512 | /* STA powersave lock and frame queues */ |
513 | spinlock_t ps_lock; | |
948d887d JB |
514 | struct sk_buff_head ps_tx_buf[IEEE80211_NUM_ACS]; |
515 | struct sk_buff_head tx_filtered[IEEE80211_NUM_ACS]; | |
516 | unsigned long driver_buffered_tids; | |
ba8c3d6f | 517 | unsigned long txq_buffered_tids; |
693b1bbc | 518 | |
ebe27c91 | 519 | long last_connected; |
ef0621e8 | 520 | |
e5a9f8d0 | 521 | /* Updated from RX path only, no locking requirements */ |
c9c5962b | 522 | struct ieee80211_sta_rx_stats rx_stats; |
0be6ed13 JB |
523 | struct { |
524 | struct ewma_signal signal; | |
525 | struct ewma_signal chain_signal[IEEE80211_MAX_CHAINS]; | |
526 | } rx_stats_avg; | |
ef0621e8 | 527 | |
9e26297a | 528 | /* Plus 1 for non-QoS frames */ |
5a306f58 | 529 | __le16 last_seq_ctrl[IEEE80211_NUM_TIDS + 1]; |
693b1bbc JB |
530 | |
531 | /* Updated from TX status path only, no locking requirements */ | |
e5a9f8d0 JB |
532 | struct { |
533 | unsigned long filtered; | |
534 | unsigned long retry_failed, retry_count; | |
535 | unsigned int lost_packets; | |
536 | unsigned long last_tdls_pkt_time; | |
537 | u64 msdu_retries[IEEE80211_NUM_TIDS + 1]; | |
538 | u64 msdu_failed[IEEE80211_NUM_TIDS + 1]; | |
b8da6b6a | 539 | unsigned long last_ack; |
e5a9f8d0 | 540 | } status_stats; |
693b1bbc JB |
541 | |
542 | /* Updated from TX path only, no locking requirements */ | |
e5a9f8d0 JB |
543 | struct { |
544 | u64 packets[IEEE80211_NUM_ACS]; | |
545 | u64 bytes[IEEE80211_NUM_ACS]; | |
546 | struct ieee80211_tx_rate last_rate; | |
547 | u64 msdu[IEEE80211_NUM_TIDS + 1]; | |
548 | } tx_stats; | |
f591fa5d | 549 | u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1]; |
f0706e82 | 550 | |
d0709a65 | 551 | /* |
07346f81 | 552 | * Aggregation information, locked with lock. |
d0709a65 | 553 | */ |
5aae2880 | 554 | struct sta_ampdu_mlme ampdu_mlme; |
5a306f58 | 555 | u8 timer_to_tid[IEEE80211_NUM_TIDS]; |
693b1bbc | 556 | |
e9f207f0 | 557 | #ifdef CONFIG_MAC80211_DEBUGFS |
fc4a25c5 | 558 | struct dentry *debugfs_dir; |
e9f207f0 | 559 | #endif |
17741cdc | 560 | |
0af83d3d JB |
561 | enum ieee80211_sta_rx_bandwidth cur_max_bandwidth; |
562 | ||
687da132 | 563 | enum ieee80211_smps_mode known_smps_mode; |
2475b1cc | 564 | const struct ieee80211_cipher_scheme *cipher_scheme; |
687da132 | 565 | |
484a54c2 THJ |
566 | struct codel_params cparams; |
567 | ||
b6da911b LK |
568 | u8 reserved_tid; |
569 | ||
0fabfaaf AN |
570 | struct cfg80211_chan_def tdls_chandef; |
571 | ||
17741cdc JB |
572 | /* keep last! */ |
573 | struct ieee80211_sta sta; | |
f0706e82 JB |
574 | }; |
575 | ||
57cf8043 | 576 | static inline enum nl80211_plink_state sta_plink_state(struct sta_info *sta) |
d6d1a5a7 JB |
577 | { |
578 | #ifdef CONFIG_MAC80211_MESH | |
433f5bc1 | 579 | return sta->mesh->plink_state; |
d6d1a5a7 | 580 | #endif |
57cf8043 | 581 | return NL80211_PLINK_LISTEN; |
d6d1a5a7 JB |
582 | } |
583 | ||
c2c98fde JB |
584 | static inline void set_sta_flag(struct sta_info *sta, |
585 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 586 | { |
d9a7ddb0 JB |
587 | WARN_ON(flag == WLAN_STA_AUTH || |
588 | flag == WLAN_STA_ASSOC || | |
589 | flag == WLAN_STA_AUTHORIZED); | |
c2c98fde | 590 | set_bit(flag, &sta->_flags); |
07346f81 JB |
591 | } |
592 | ||
c2c98fde JB |
593 | static inline void clear_sta_flag(struct sta_info *sta, |
594 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 595 | { |
d9a7ddb0 JB |
596 | WARN_ON(flag == WLAN_STA_AUTH || |
597 | flag == WLAN_STA_ASSOC || | |
598 | flag == WLAN_STA_AUTHORIZED); | |
c2c98fde | 599 | clear_bit(flag, &sta->_flags); |
07346f81 JB |
600 | } |
601 | ||
c2c98fde JB |
602 | static inline int test_sta_flag(struct sta_info *sta, |
603 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 604 | { |
c2c98fde | 605 | return test_bit(flag, &sta->_flags); |
07346f81 JB |
606 | } |
607 | ||
c2c98fde JB |
608 | static inline int test_and_clear_sta_flag(struct sta_info *sta, |
609 | enum ieee80211_sta_info_flags flag) | |
07346f81 | 610 | { |
d9a7ddb0 JB |
611 | WARN_ON(flag == WLAN_STA_AUTH || |
612 | flag == WLAN_STA_ASSOC || | |
613 | flag == WLAN_STA_AUTHORIZED); | |
c2c98fde | 614 | return test_and_clear_bit(flag, &sta->_flags); |
07346f81 JB |
615 | } |
616 | ||
e7f4a940 JB |
617 | static inline int test_and_set_sta_flag(struct sta_info *sta, |
618 | enum ieee80211_sta_info_flags flag) | |
619 | { | |
d9a7ddb0 JB |
620 | WARN_ON(flag == WLAN_STA_AUTH || |
621 | flag == WLAN_STA_ASSOC || | |
622 | flag == WLAN_STA_AUTHORIZED); | |
e7f4a940 JB |
623 | return test_and_set_bit(flag, &sta->_flags); |
624 | } | |
625 | ||
83d5cc01 JB |
626 | int sta_info_move_state(struct sta_info *sta, |
627 | enum ieee80211_sta_state new_state); | |
d9a7ddb0 | 628 | |
83d5cc01 JB |
629 | static inline void sta_info_pre_move_state(struct sta_info *sta, |
630 | enum ieee80211_sta_state new_state) | |
d9a7ddb0 | 631 | { |
83d5cc01 JB |
632 | int ret; |
633 | ||
634 | WARN_ON_ONCE(test_sta_flag(sta, WLAN_STA_INSERTED)); | |
635 | ||
636 | ret = sta_info_move_state(sta, new_state); | |
d9a7ddb0 JB |
637 | WARN_ON_ONCE(ret); |
638 | } | |
639 | ||
640 | ||
ec034b20 JB |
641 | void ieee80211_assign_tid_tx(struct sta_info *sta, int tid, |
642 | struct tid_ampdu_tx *tid_tx); | |
f0706e82 | 643 | |
40b275b6 JB |
644 | static inline struct tid_ampdu_tx * |
645 | rcu_dereference_protected_tid_tx(struct sta_info *sta, int tid) | |
646 | { | |
647 | return rcu_dereference_protected(sta->ampdu_mlme.tid_tx[tid], | |
648 | lockdep_is_held(&sta->lock) || | |
649 | lockdep_is_held(&sta->ampdu_mlme.mtx)); | |
650 | } | |
f0706e82 | 651 | |
948d887d JB |
652 | /* Maximum number of frames to buffer per power saving station per AC */ |
653 | #define STA_MAX_TX_BUFFER 64 | |
f0706e82 JB |
654 | |
655 | /* Minimum buffered frame expiry time. If STA uses listen interval that is | |
656 | * smaller than this value, the minimum value here is used instead. */ | |
657 | #define STA_TX_BUFFER_EXPIRE (10 * HZ) | |
658 | ||
659 | /* How often station data is cleaned up (e.g., expiration of buffered frames) | |
660 | */ | |
661 | #define STA_INFO_CLEANUP_INTERVAL (10 * HZ) | |
662 | ||
83e7e4ce HX |
663 | struct rhlist_head *sta_info_hash_lookup(struct ieee80211_local *local, |
664 | const u8 *addr); | |
665 | ||
d0709a65 | 666 | /* |
abe60632 | 667 | * Get a STA info, must be under RCU read lock. |
d0709a65 | 668 | */ |
abe60632 JB |
669 | struct sta_info *sta_info_get(struct ieee80211_sub_if_data *sdata, |
670 | const u8 *addr); | |
671 | ||
0e5ded5a FF |
672 | struct sta_info *sta_info_get_bss(struct ieee80211_sub_if_data *sdata, |
673 | const u8 *addr); | |
674 | ||
83e7e4ce HX |
675 | #define for_each_sta_info(local, _addr, _sta, _tmp) \ |
676 | rhl_for_each_entry_rcu(_sta, _tmp, \ | |
677 | sta_info_hash_lookup(local, _addr), hash_node) | |
abe60632 | 678 | |
d0709a65 JB |
679 | /* |
680 | * Get STA info by index, BROKEN! | |
681 | */ | |
3b53fde8 JB |
682 | struct sta_info *sta_info_get_by_idx(struct ieee80211_sub_if_data *sdata, |
683 | int idx); | |
d0709a65 | 684 | /* |
73651ee6 JB |
685 | * Create a new STA info, caller owns returned structure |
686 | * until sta_info_insert(). | |
d0709a65 | 687 | */ |
73651ee6 | 688 | struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata, |
56544160 | 689 | const u8 *addr, gfp_t gfp); |
d9a7ddb0 JB |
690 | |
691 | void sta_info_free(struct ieee80211_local *local, struct sta_info *sta); | |
692 | ||
73651ee6 JB |
693 | /* |
694 | * Insert STA info into hash table/list, returns zero or a | |
695 | * -EEXIST if (if the same MAC address is already present). | |
696 | * | |
34e89507 JB |
697 | * Calling the non-rcu version makes the caller relinquish, |
698 | * the _rcu version calls read_lock_rcu() and must be called | |
699 | * without it held. | |
73651ee6 JB |
700 | */ |
701 | int sta_info_insert(struct sta_info *sta); | |
34e89507 | 702 | int sta_info_insert_rcu(struct sta_info *sta) __acquires(RCU); |
34e89507 | 703 | |
83d5cc01 | 704 | int __must_check __sta_info_destroy(struct sta_info *sta); |
34e89507 JB |
705 | int sta_info_destroy_addr(struct ieee80211_sub_if_data *sdata, |
706 | const u8 *addr); | |
707 | int sta_info_destroy_addr_bss(struct ieee80211_sub_if_data *sdata, | |
708 | const u8 *addr); | |
f0706e82 | 709 | |
c868cb35 | 710 | void sta_info_recalc_tim(struct sta_info *sta); |
004c872e | 711 | |
7bedd0cf | 712 | int sta_info_init(struct ieee80211_local *local); |
d0709a65 | 713 | void sta_info_stop(struct ieee80211_local *local); |
051007d9 JB |
714 | |
715 | /** | |
716 | * sta_info_flush - flush matching STA entries from the STA table | |
717 | * | |
718 | * Returns the number of removed STA entries. | |
719 | * | |
720 | * @sdata: sdata to remove all stations from | |
e716251d | 721 | * @vlans: if the given interface is an AP interface, also flush VLANs |
051007d9 | 722 | */ |
e716251d JB |
723 | int __sta_info_flush(struct ieee80211_sub_if_data *sdata, bool vlans); |
724 | ||
725 | static inline int sta_info_flush(struct ieee80211_sub_if_data *sdata) | |
726 | { | |
727 | return __sta_info_flush(sdata, false); | |
728 | } | |
051007d9 | 729 | |
6b62bf32 TP |
730 | void sta_set_rate_info_tx(struct sta_info *sta, |
731 | const struct ieee80211_tx_rate *rate, | |
732 | struct rate_info *rinfo); | |
b7ffbd7e JB |
733 | void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo); |
734 | ||
3b17fbf8 MA |
735 | u32 sta_get_expected_throughput(struct sta_info *sta); |
736 | ||
24723d1b JB |
737 | void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, |
738 | unsigned long exp_time); | |
687da132 | 739 | u8 sta_info_tx_streams(struct sta_info *sta); |
d0709a65 | 740 | |
af818581 JB |
741 | void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); |
742 | void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); | |
47086fc5 | 743 | void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); |
af818581 | 744 | |
b8da6b6a JB |
745 | unsigned long ieee80211_sta_last_active(struct sta_info *sta); |
746 | ||
dcba665b JB |
747 | enum sta_stats_type { |
748 | STA_STATS_RATE_TYPE_INVALID = 0, | |
749 | STA_STATS_RATE_TYPE_LEGACY, | |
750 | STA_STATS_RATE_TYPE_HT, | |
751 | STA_STATS_RATE_TYPE_VHT, | |
752 | }; | |
753 | ||
754 | #define STA_STATS_FIELD_HT_MCS GENMASK( 7, 0) | |
755 | #define STA_STATS_FIELD_LEGACY_IDX GENMASK( 3, 0) | |
756 | #define STA_STATS_FIELD_LEGACY_BAND GENMASK( 7, 4) | |
757 | #define STA_STATS_FIELD_VHT_MCS GENMASK( 3, 0) | |
758 | #define STA_STATS_FIELD_VHT_NSS GENMASK( 7, 4) | |
759 | #define STA_STATS_FIELD_BW GENMASK(11, 8) | |
760 | #define STA_STATS_FIELD_SGI GENMASK(12, 12) | |
761 | #define STA_STATS_FIELD_TYPE GENMASK(15, 13) | |
762 | ||
763 | #define STA_STATS_FIELD(_n, _v) FIELD_PREP(STA_STATS_FIELD_ ## _n, _v) | |
764 | #define STA_STATS_GET(_n, _v) FIELD_GET(STA_STATS_FIELD_ ## _n, _v) | |
765 | ||
4f6b1b3d | 766 | #define STA_STATS_RATE_INVALID 0 |
dcba665b JB |
767 | |
768 | static inline u32 sta_stats_encode_rate(struct ieee80211_rx_status *s) | |
4f6b1b3d | 769 | { |
dcba665b | 770 | u16 r; |
4f6b1b3d | 771 | |
dcba665b | 772 | r = STA_STATS_FIELD(BW, s->bw); |
4f6b1b3d | 773 | |
7fdd69c5 | 774 | if (s->enc_flags & RX_ENC_FLAG_SHORT_GI) |
dcba665b | 775 | r |= STA_STATS_FIELD(SGI, 1); |
4f6b1b3d | 776 | |
da6a4352 JB |
777 | switch (s->encoding) { |
778 | case RX_ENC_VHT: | |
dcba665b JB |
779 | r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_VHT); |
780 | r |= STA_STATS_FIELD(VHT_NSS, s->nss); | |
781 | r |= STA_STATS_FIELD(VHT_MCS, s->rate_idx); | |
da6a4352 JB |
782 | break; |
783 | case RX_ENC_HT: | |
dcba665b JB |
784 | r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_HT); |
785 | r |= STA_STATS_FIELD(HT_MCS, s->rate_idx); | |
da6a4352 | 786 | break; |
da6a4352 | 787 | case RX_ENC_LEGACY: |
dcba665b JB |
788 | r |= STA_STATS_FIELD(TYPE, STA_STATS_RATE_TYPE_LEGACY); |
789 | r |= STA_STATS_FIELD(LEGACY_BAND, s->band); | |
790 | r |= STA_STATS_FIELD(LEGACY_IDX, s->rate_idx); | |
da6a4352 | 791 | break; |
dcba665b JB |
792 | default: |
793 | WARN_ON(1); | |
794 | return STA_STATS_RATE_INVALID; | |
da6a4352 | 795 | } |
4f6b1b3d JB |
796 | |
797 | return r; | |
798 | } | |
799 | ||
f0706e82 | 800 | #endif /* STA_INFO_H */ |