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f0706e82 | 1 | /* |
3017b80b JB |
2 | * mac80211 <-> driver interface |
3 | * | |
f0706e82 JB |
4 | * Copyright 2002-2005, Devicescape Software, Inc. |
5 | * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> | |
ae5eb026 | 6 | * Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net> |
f0706e82 JB |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License version 2 as | |
10 | * published by the Free Software Foundation. | |
11 | */ | |
12 | ||
13 | #ifndef MAC80211_H | |
14 | #define MAC80211_H | |
15 | ||
16 | #include <linux/kernel.h> | |
17 | #include <linux/if_ether.h> | |
18 | #include <linux/skbuff.h> | |
19 | #include <linux/wireless.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/ieee80211.h> | |
f0706e82 JB |
22 | #include <net/cfg80211.h> |
23 | ||
75a5f0cc JB |
24 | /** |
25 | * DOC: Introduction | |
26 | * | |
27 | * mac80211 is the Linux stack for 802.11 hardware that implements | |
28 | * only partial functionality in hard- or firmware. This document | |
29 | * defines the interface between mac80211 and low-level hardware | |
30 | * drivers. | |
31 | */ | |
32 | ||
33 | /** | |
34 | * DOC: Calling mac80211 from interrupts | |
35 | * | |
36 | * Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be | |
f0706e82 JB |
37 | * called in hardware interrupt context. The low-level driver must not call any |
38 | * other functions in hardware interrupt context. If there is a need for such | |
39 | * call, the low-level driver should first ACK the interrupt and perform the | |
2485f710 JB |
40 | * IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even |
41 | * tasklet function. | |
42 | * | |
43 | * NOTE: If the driver opts to use the _irqsafe() functions, it may not also | |
6ef307bc | 44 | * use the non-IRQ-safe functions! |
f0706e82 JB |
45 | */ |
46 | ||
75a5f0cc JB |
47 | /** |
48 | * DOC: Warning | |
49 | * | |
50 | * If you're reading this document and not the header file itself, it will | |
51 | * be incomplete because not all documentation has been converted yet. | |
52 | */ | |
53 | ||
54 | /** | |
55 | * DOC: Frame format | |
56 | * | |
57 | * As a general rule, when frames are passed between mac80211 and the driver, | |
58 | * they start with the IEEE 802.11 header and include the same octets that are | |
59 | * sent over the air except for the FCS which should be calculated by the | |
60 | * hardware. | |
61 | * | |
62 | * There are, however, various exceptions to this rule for advanced features: | |
63 | * | |
64 | * The first exception is for hardware encryption and decryption offload | |
65 | * where the IV/ICV may or may not be generated in hardware. | |
66 | * | |
67 | * Secondly, when the hardware handles fragmentation, the frame handed to | |
68 | * the driver from mac80211 is the MSDU, not the MPDU. | |
69 | * | |
70 | * Finally, for received frames, the driver is able to indicate that it has | |
71 | * filled a radiotap header and put that in front of the frame; if it does | |
72 | * not do so then mac80211 may add this under certain circumstances. | |
f0706e82 JB |
73 | */ |
74 | ||
42935eca LR |
75 | /** |
76 | * DOC: mac80211 workqueue | |
77 | * | |
78 | * mac80211 provides its own workqueue for drivers and internal mac80211 use. | |
79 | * The workqueue is a single threaded workqueue and can only be accessed by | |
80 | * helpers for sanity checking. Drivers must ensure all work added onto the | |
81 | * mac80211 workqueue should be cancelled on the driver stop() callback. | |
82 | * | |
83 | * mac80211 will flushed the workqueue upon interface removal and during | |
84 | * suspend. | |
85 | * | |
86 | * All work performed on the mac80211 workqueue must not acquire the RTNL lock. | |
87 | * | |
88 | */ | |
89 | ||
e100bb64 JB |
90 | /** |
91 | * enum ieee80211_max_queues - maximum number of queues | |
92 | * | |
93 | * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. | |
e100bb64 JB |
94 | */ |
95 | enum ieee80211_max_queues { | |
51b38147 | 96 | IEEE80211_MAX_QUEUES = 4, |
e100bb64 JB |
97 | }; |
98 | ||
6b301cdf JB |
99 | /** |
100 | * struct ieee80211_tx_queue_params - transmit queue configuration | |
101 | * | |
102 | * The information provided in this structure is required for QoS | |
3330d7be | 103 | * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. |
6b301cdf | 104 | * |
e37d4dff | 105 | * @aifs: arbitration interframe space [0..255] |
f434b2d1 JB |
106 | * @cw_min: minimum contention window [a value of the form |
107 | * 2^n-1 in the range 1..32767] | |
6b301cdf | 108 | * @cw_max: maximum contention window [like @cw_min] |
3330d7be | 109 | * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled |
6b301cdf | 110 | */ |
f0706e82 | 111 | struct ieee80211_tx_queue_params { |
f434b2d1 | 112 | u16 txop; |
3330d7be JB |
113 | u16 cw_min; |
114 | u16 cw_max; | |
f434b2d1 | 115 | u8 aifs; |
f0706e82 JB |
116 | }; |
117 | ||
6b301cdf | 118 | /** |
57ffc589 | 119 | * struct ieee80211_tx_queue_stats - transmit queue statistics |
6b301cdf JB |
120 | * |
121 | * @len: number of packets in queue | |
122 | * @limit: queue length limit | |
123 | * @count: number of frames sent | |
124 | */ | |
57ffc589 | 125 | struct ieee80211_tx_queue_stats { |
6b301cdf JB |
126 | unsigned int len; |
127 | unsigned int limit; | |
128 | unsigned int count; | |
f0706e82 JB |
129 | }; |
130 | ||
f0706e82 JB |
131 | struct ieee80211_low_level_stats { |
132 | unsigned int dot11ACKFailureCount; | |
133 | unsigned int dot11RTSFailureCount; | |
134 | unsigned int dot11FCSErrorCount; | |
135 | unsigned int dot11RTSSuccessCount; | |
136 | }; | |
137 | ||
471b3efd JB |
138 | /** |
139 | * enum ieee80211_bss_change - BSS change notification flags | |
140 | * | |
141 | * These flags are used with the bss_info_changed() callback | |
142 | * to indicate which BSS parameter changed. | |
143 | * | |
144 | * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), | |
145 | * also implies a change in the AID. | |
146 | * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed | |
147 | * @BSS_CHANGED_ERP_PREAMBLE: preamble changed | |
9f1ba906 | 148 | * @BSS_CHANGED_ERP_SLOT: slot timing changed |
38668c05 | 149 | * @BSS_CHANGED_HT: 802.11n parameters changed |
96dd22ac | 150 | * @BSS_CHANGED_BASIC_RATES: Basic rateset changed |
57c4d7b4 | 151 | * @BSS_CHANGED_BEACON_INT: Beacon interval changed |
2d0ddec5 JB |
152 | * @BSS_CHANGED_BSSID: BSSID changed, for whatever |
153 | * reason (IBSS and managed mode) | |
154 | * @BSS_CHANGED_BEACON: Beacon data changed, retrieve | |
155 | * new beacon (beaconing modes) | |
156 | * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be | |
157 | * enabled/disabled (beaconing modes) | |
471b3efd JB |
158 | */ |
159 | enum ieee80211_bss_change { | |
160 | BSS_CHANGED_ASSOC = 1<<0, | |
161 | BSS_CHANGED_ERP_CTS_PROT = 1<<1, | |
162 | BSS_CHANGED_ERP_PREAMBLE = 1<<2, | |
9f1ba906 | 163 | BSS_CHANGED_ERP_SLOT = 1<<3, |
38668c05 | 164 | BSS_CHANGED_HT = 1<<4, |
96dd22ac | 165 | BSS_CHANGED_BASIC_RATES = 1<<5, |
57c4d7b4 | 166 | BSS_CHANGED_BEACON_INT = 1<<6, |
2d0ddec5 JB |
167 | BSS_CHANGED_BSSID = 1<<7, |
168 | BSS_CHANGED_BEACON = 1<<8, | |
169 | BSS_CHANGED_BEACON_ENABLED = 1<<9, | |
471b3efd JB |
170 | }; |
171 | ||
172 | /** | |
173 | * struct ieee80211_bss_conf - holds the BSS's changing parameters | |
174 | * | |
175 | * This structure keeps information about a BSS (and an association | |
176 | * to that BSS) that can change during the lifetime of the BSS. | |
177 | * | |
178 | * @assoc: association status | |
179 | * @aid: association ID number, valid only when @assoc is true | |
180 | * @use_cts_prot: use CTS protection | |
7a5158ef JB |
181 | * @use_short_preamble: use 802.11b short preamble; |
182 | * if the hardware cannot handle this it must set the | |
183 | * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag | |
184 | * @use_short_slot: use short slot time (only relevant for ERP); | |
185 | * if the hardware cannot handle this it must set the | |
186 | * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag | |
98f7dfd8 | 187 | * @dtim_period: num of beacons before the next DTIM, for PSM |
21c0cbe7 TW |
188 | * @timestamp: beacon timestamp |
189 | * @beacon_int: beacon interval | |
98f7dfd8 | 190 | * @assoc_capability: capabilities taken from assoc resp |
96dd22ac JB |
191 | * @basic_rates: bitmap of basic rates, each bit stands for an |
192 | * index into the rate table configured by the driver in | |
193 | * the current band. | |
2d0ddec5 JB |
194 | * @bssid: The BSSID for this BSS |
195 | * @enable_beacon: whether beaconing should be enabled or not | |
9ed6bcce JB |
196 | * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). |
197 | * This field is only valid when the channel type is one of the HT types. | |
471b3efd JB |
198 | */ |
199 | struct ieee80211_bss_conf { | |
2d0ddec5 | 200 | const u8 *bssid; |
471b3efd JB |
201 | /* association related data */ |
202 | bool assoc; | |
203 | u16 aid; | |
204 | /* erp related data */ | |
205 | bool use_cts_prot; | |
206 | bool use_short_preamble; | |
9f1ba906 | 207 | bool use_short_slot; |
2d0ddec5 | 208 | bool enable_beacon; |
98f7dfd8 | 209 | u8 dtim_period; |
21c0cbe7 TW |
210 | u16 beacon_int; |
211 | u16 assoc_capability; | |
212 | u64 timestamp; | |
881d948c | 213 | u32 basic_rates; |
9ed6bcce | 214 | u16 ht_operation_mode; |
471b3efd JB |
215 | }; |
216 | ||
11f4b1ce | 217 | /** |
6ef307bc | 218 | * enum mac80211_tx_control_flags - flags to describe transmission information/status |
e039fa4a | 219 | * |
6ef307bc | 220 | * These flags are used with the @flags member of &ieee80211_tx_info. |
e039fa4a JB |
221 | * |
222 | * @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame. | |
e6a9854b JB |
223 | * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence |
224 | * number to this frame, taking care of not overwriting the fragment | |
225 | * number and increasing the sequence number only when the | |
226 | * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly | |
227 | * assign sequence numbers to QoS-data frames but cannot do so correctly | |
228 | * for non-QoS-data and management frames because beacons need them from | |
229 | * that counter as well and mac80211 cannot guarantee proper sequencing. | |
230 | * If this flag is set, the driver should instruct the hardware to | |
231 | * assign a sequence number to the frame or assign one itself. Cf. IEEE | |
232 | * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for | |
233 | * beacons and always be clear for frames without a sequence number field. | |
e039fa4a | 234 | * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack |
e039fa4a JB |
235 | * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination |
236 | * station | |
e039fa4a | 237 | * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame |
e039fa4a JB |
238 | * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon |
239 | * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU | |
e6a9854b | 240 | * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. |
e039fa4a | 241 | * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted |
ab5b5342 JB |
242 | * because the destination STA was in powersave mode. Note that to |
243 | * avoid race conditions, the filter must be set by the hardware or | |
244 | * firmware upon receiving a frame that indicates that the station | |
245 | * went to sleep (must be done on device to filter frames already on | |
246 | * the queue) and may only be unset after mac80211 gives the OK for | |
247 | * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), | |
248 | * since only then is it guaranteed that no more frames are in the | |
249 | * hardware queue. | |
e039fa4a JB |
250 | * @IEEE80211_TX_STAT_ACK: Frame was acknowledged |
251 | * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status | |
252 | * is for the whole aggregation. | |
429a3805 RR |
253 | * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, |
254 | * so consider using block ack request (BAR). | |
e6a9854b JB |
255 | * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be |
256 | * set by rate control algorithms to indicate probe rate, will | |
257 | * be cleared for fragmented frames (except on the last fragment) | |
2b874e83 JB |
258 | * @IEEE80211_TX_INTFL_RCALGO: mac80211 internal flag, do not test or |
259 | * set this flag in the driver; indicates that the rate control | |
260 | * algorithm was used and should be notified of TX status | |
cd8ffc80 JB |
261 | * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, |
262 | * used to indicate that a pending frame requires TX processing before | |
263 | * it can be sent out. | |
8f77f384 JB |
264 | * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, |
265 | * used to indicate that a frame was already retried due to PS | |
3b8d81e0 JB |
266 | * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, |
267 | * used to indicate frame should not be encrypted | |
3fa52056 JB |
268 | * @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?) |
269 | * This frame is a response to a PS-poll frame and should be sent | |
270 | * although the station is in powersave mode. | |
ad5351db JB |
271 | * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the |
272 | * transmit function after the current frame, this can be used | |
273 | * by drivers to kick the DMA queue only if unset or when the | |
274 | * queue gets full. | |
11f4b1ce RR |
275 | */ |
276 | enum mac80211_tx_control_flags { | |
e039fa4a | 277 | IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), |
e6a9854b JB |
278 | IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), |
279 | IEEE80211_TX_CTL_NO_ACK = BIT(2), | |
280 | IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), | |
281 | IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), | |
282 | IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), | |
283 | IEEE80211_TX_CTL_AMPDU = BIT(6), | |
284 | IEEE80211_TX_CTL_INJECTED = BIT(7), | |
285 | IEEE80211_TX_STAT_TX_FILTERED = BIT(8), | |
286 | IEEE80211_TX_STAT_ACK = BIT(9), | |
287 | IEEE80211_TX_STAT_AMPDU = BIT(10), | |
288 | IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), | |
289 | IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), | |
2b874e83 | 290 | IEEE80211_TX_INTFL_RCALGO = BIT(13), |
cd8ffc80 | 291 | IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), |
8f77f384 | 292 | IEEE80211_TX_INTFL_RETRIED = BIT(15), |
3b8d81e0 | 293 | IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), |
3fa52056 | 294 | IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17), |
ad5351db | 295 | IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), |
11f4b1ce RR |
296 | }; |
297 | ||
2134e7e7 S |
298 | /** |
299 | * enum mac80211_rate_control_flags - per-rate flags set by the | |
300 | * Rate Control algorithm. | |
301 | * | |
302 | * These flags are set by the Rate control algorithm for each rate during tx, | |
303 | * in the @flags member of struct ieee80211_tx_rate. | |
304 | * | |
305 | * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. | |
306 | * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. | |
307 | * This is set if the current BSS requires ERP protection. | |
308 | * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. | |
309 | * @IEEE80211_TX_RC_MCS: HT rate. | |
310 | * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in | |
311 | * Greenfield mode. | |
312 | * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. | |
313 | * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the | |
314 | * adjacent 20 MHz channels, if the current channel type is | |
315 | * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. | |
316 | * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. | |
317 | */ | |
e6a9854b JB |
318 | enum mac80211_rate_control_flags { |
319 | IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), | |
320 | IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), | |
321 | IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), | |
322 | ||
323 | /* rate index is an MCS rate number instead of an index */ | |
324 | IEEE80211_TX_RC_MCS = BIT(3), | |
325 | IEEE80211_TX_RC_GREEN_FIELD = BIT(4), | |
326 | IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), | |
327 | IEEE80211_TX_RC_DUP_DATA = BIT(6), | |
328 | IEEE80211_TX_RC_SHORT_GI = BIT(7), | |
329 | }; | |
330 | ||
331 | ||
332 | /* there are 40 bytes if you don't need the rateset to be kept */ | |
333 | #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 | |
8318d78a | 334 | |
e6a9854b JB |
335 | /* if you do need the rateset, then you have less space */ |
336 | #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 | |
1c014420 | 337 | |
e6a9854b JB |
338 | /* maximum number of rate stages */ |
339 | #define IEEE80211_TX_MAX_RATES 5 | |
870abdf6 FF |
340 | |
341 | /** | |
e6a9854b | 342 | * struct ieee80211_tx_rate - rate selection/status |
870abdf6 | 343 | * |
e6a9854b JB |
344 | * @idx: rate index to attempt to send with |
345 | * @flags: rate control flags (&enum mac80211_rate_control_flags) | |
e25cf4a6 | 346 | * @count: number of tries in this rate before going to the next rate |
e6a9854b JB |
347 | * |
348 | * A value of -1 for @idx indicates an invalid rate and, if used | |
349 | * in an array of retry rates, that no more rates should be tried. | |
350 | * | |
351 | * When used for transmit status reporting, the driver should | |
352 | * always report the rate along with the flags it used. | |
c555b9b3 JB |
353 | * |
354 | * &struct ieee80211_tx_info contains an array of these structs | |
355 | * in the control information, and it will be filled by the rate | |
356 | * control algorithm according to what should be sent. For example, | |
357 | * if this array contains, in the format { <idx>, <count> } the | |
358 | * information | |
359 | * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } | |
360 | * then this means that the frame should be transmitted | |
361 | * up to twice at rate 3, up to twice at rate 2, and up to four | |
362 | * times at rate 1 if it doesn't get acknowledged. Say it gets | |
363 | * acknowledged by the peer after the fifth attempt, the status | |
364 | * information should then contain | |
365 | * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... | |
366 | * since it was transmitted twice at rate 3, twice at rate 2 | |
367 | * and once at rate 1 after which we received an acknowledgement. | |
870abdf6 | 368 | */ |
e6a9854b JB |
369 | struct ieee80211_tx_rate { |
370 | s8 idx; | |
371 | u8 count; | |
372 | u8 flags; | |
4821277f | 373 | } __attribute__((packed)); |
870abdf6 | 374 | |
e039fa4a JB |
375 | /** |
376 | * struct ieee80211_tx_info - skb transmit information | |
377 | * | |
378 | * This structure is placed in skb->cb for three uses: | |
379 | * (1) mac80211 TX control - mac80211 tells the driver what to do | |
380 | * (2) driver internal use (if applicable) | |
381 | * (3) TX status information - driver tells mac80211 what happened | |
382 | * | |
17741cdc JB |
383 | * The TX control's sta pointer is only valid during the ->tx call, |
384 | * it may be NULL. | |
385 | * | |
e039fa4a | 386 | * @flags: transmit info flags, defined above |
e6a9854b | 387 | * @band: the band to transmit on (use for checking for races) |
0f4ac38b | 388 | * @antenna_sel_tx: antenna to use, 0 for automatic diversity |
8bef7a10 | 389 | * @pad: padding, ignore |
6ef307bc RD |
390 | * @control: union for control data |
391 | * @status: union for status data | |
392 | * @driver_data: array of driver_data pointers | |
e039fa4a JB |
393 | * @ampdu_ack_len: number of aggregated frames. |
394 | * relevant only if IEEE80211_TX_STATUS_AMPDU was set. | |
395 | * @ampdu_ack_map: block ack bit map for the aggregation. | |
396 | * relevant only if IEEE80211_TX_STATUS_AMPDU was set. | |
397 | * @ack_signal: signal strength of the ACK frame | |
1c014420 | 398 | */ |
e039fa4a JB |
399 | struct ieee80211_tx_info { |
400 | /* common information */ | |
401 | u32 flags; | |
402 | u8 band; | |
e6a9854b | 403 | |
e039fa4a | 404 | u8 antenna_sel_tx; |
2e92e6f2 | 405 | |
e6a9854b | 406 | /* 2 byte hole */ |
62727101 | 407 | u8 pad[2]; |
e039fa4a JB |
408 | |
409 | union { | |
410 | struct { | |
e6a9854b JB |
411 | union { |
412 | /* rate control */ | |
413 | struct { | |
414 | struct ieee80211_tx_rate rates[ | |
415 | IEEE80211_TX_MAX_RATES]; | |
416 | s8 rts_cts_rate_idx; | |
417 | }; | |
418 | /* only needed before rate control */ | |
419 | unsigned long jiffies; | |
420 | }; | |
25d834e1 | 421 | /* NB: vif can be NULL for injected frames */ |
e039fa4a JB |
422 | struct ieee80211_vif *vif; |
423 | struct ieee80211_key_conf *hw_key; | |
17741cdc | 424 | struct ieee80211_sta *sta; |
e039fa4a JB |
425 | } control; |
426 | struct { | |
e6a9854b JB |
427 | struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; |
428 | u8 ampdu_ack_len; | |
e039fa4a JB |
429 | u64 ampdu_ack_map; |
430 | int ack_signal; | |
e6a9854b | 431 | /* 8 bytes free */ |
e039fa4a | 432 | } status; |
e6a9854b JB |
433 | struct { |
434 | struct ieee80211_tx_rate driver_rates[ | |
435 | IEEE80211_TX_MAX_RATES]; | |
436 | void *rate_driver_data[ | |
437 | IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; | |
438 | }; | |
439 | void *driver_data[ | |
440 | IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; | |
e039fa4a | 441 | }; |
f0706e82 JB |
442 | }; |
443 | ||
e039fa4a JB |
444 | static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) |
445 | { | |
446 | return (struct ieee80211_tx_info *)skb->cb; | |
447 | } | |
7ac1bd6a | 448 | |
f1d58c25 JB |
449 | static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) |
450 | { | |
451 | return (struct ieee80211_rx_status *)skb->cb; | |
452 | } | |
453 | ||
e6a9854b JB |
454 | /** |
455 | * ieee80211_tx_info_clear_status - clear TX status | |
456 | * | |
457 | * @info: The &struct ieee80211_tx_info to be cleared. | |
458 | * | |
459 | * When the driver passes an skb back to mac80211, it must report | |
460 | * a number of things in TX status. This function clears everything | |
461 | * in the TX status but the rate control information (it does clear | |
462 | * the count since you need to fill that in anyway). | |
463 | * | |
464 | * NOTE: You can only use this function if you do NOT use | |
465 | * info->driver_data! Use info->rate_driver_data | |
466 | * instead if you need only the less space that allows. | |
467 | */ | |
468 | static inline void | |
469 | ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) | |
470 | { | |
471 | int i; | |
472 | ||
473 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != | |
474 | offsetof(struct ieee80211_tx_info, control.rates)); | |
475 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != | |
476 | offsetof(struct ieee80211_tx_info, driver_rates)); | |
477 | BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); | |
478 | /* clear the rate counts */ | |
479 | for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) | |
480 | info->status.rates[i].count = 0; | |
481 | ||
482 | BUILD_BUG_ON( | |
483 | offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); | |
484 | memset(&info->status.ampdu_ack_len, 0, | |
485 | sizeof(struct ieee80211_tx_info) - | |
486 | offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); | |
487 | } | |
488 | ||
7ac1bd6a JB |
489 | |
490 | /** | |
491 | * enum mac80211_rx_flags - receive flags | |
492 | * | |
493 | * These flags are used with the @flag member of &struct ieee80211_rx_status. | |
494 | * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. | |
495 | * Use together with %RX_FLAG_MMIC_STRIPPED. | |
496 | * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. | |
497 | * @RX_FLAG_RADIOTAP: This frame starts with a radiotap header. | |
498 | * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, | |
499 | * verification has been done by the hardware. | |
500 | * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. | |
501 | * If this flag is set, the stack cannot do any replay detection | |
502 | * hence the driver or hardware will have to do that. | |
72abd81b JB |
503 | * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on |
504 | * the frame. | |
505 | * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on | |
506 | * the frame. | |
c49e5ea3 | 507 | * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) |
9d9bf77d BR |
508 | * is valid. This is useful in monitor mode and necessary for beacon frames |
509 | * to enable IBSS merging. | |
b4f28bbb | 510 | * @RX_FLAG_SHORTPRE: Short preamble was used for this frame |
0fb8ca45 JM |
511 | * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index |
512 | * @RX_FLAG_40MHZ: HT40 (40 MHz) was used | |
513 | * @RX_FLAG_SHORT_GI: Short guard interval was used | |
7ac1bd6a JB |
514 | */ |
515 | enum mac80211_rx_flags { | |
516 | RX_FLAG_MMIC_ERROR = 1<<0, | |
517 | RX_FLAG_DECRYPTED = 1<<1, | |
518 | RX_FLAG_RADIOTAP = 1<<2, | |
519 | RX_FLAG_MMIC_STRIPPED = 1<<3, | |
520 | RX_FLAG_IV_STRIPPED = 1<<4, | |
72abd81b JB |
521 | RX_FLAG_FAILED_FCS_CRC = 1<<5, |
522 | RX_FLAG_FAILED_PLCP_CRC = 1<<6, | |
c49e5ea3 | 523 | RX_FLAG_TSFT = 1<<7, |
0fb8ca45 JM |
524 | RX_FLAG_SHORTPRE = 1<<8, |
525 | RX_FLAG_HT = 1<<9, | |
526 | RX_FLAG_40MHZ = 1<<10, | |
527 | RX_FLAG_SHORT_GI = 1<<11, | |
7ac1bd6a JB |
528 | }; |
529 | ||
530 | /** | |
531 | * struct ieee80211_rx_status - receive status | |
532 | * | |
533 | * The low-level driver should provide this information (the subset | |
534 | * supported by hardware) to the 802.11 code with each received | |
f1d58c25 | 535 | * frame, in the skb's control buffer (cb). |
566bfe5a | 536 | * |
c132bec3 BR |
537 | * @mactime: value in microseconds of the 64-bit Time Synchronization Function |
538 | * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. | |
8318d78a | 539 | * @band: the active band when this frame was received |
7ac1bd6a | 540 | * @freq: frequency the radio was tuned to when receiving this frame, in MHz |
566bfe5a BR |
541 | * @signal: signal strength when receiving this frame, either in dBm, in dB or |
542 | * unspecified depending on the hardware capabilities flags | |
543 | * @IEEE80211_HW_SIGNAL_* | |
544 | * @noise: noise when receiving this frame, in dBm. | |
545 | * @qual: overall signal quality indication, in percent (0-100). | |
7ac1bd6a | 546 | * @antenna: antenna used |
0fb8ca45 JM |
547 | * @rate_idx: index of data rate into band's supported rates or MCS index if |
548 | * HT rates are use (RX_FLAG_HT) | |
7ac1bd6a JB |
549 | * @flag: %RX_FLAG_* |
550 | */ | |
f0706e82 JB |
551 | struct ieee80211_rx_status { |
552 | u64 mactime; | |
8318d78a | 553 | enum ieee80211_band band; |
7ac1bd6a | 554 | int freq; |
7ac1bd6a | 555 | int signal; |
f0706e82 | 556 | int noise; |
566bfe5a | 557 | int qual; |
f0706e82 | 558 | int antenna; |
8318d78a | 559 | int rate_idx; |
f0706e82 JB |
560 | int flag; |
561 | }; | |
562 | ||
6b301cdf JB |
563 | /** |
564 | * enum ieee80211_conf_flags - configuration flags | |
565 | * | |
566 | * Flags to define PHY configuration options | |
567 | * | |
6b301cdf | 568 | * @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported) |
04fe2037 | 569 | * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only) |
5cff20e6 JB |
570 | * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set |
571 | * the driver should be prepared to handle configuration requests but | |
572 | * may turn the device off as much as possible. Typically, this flag will | |
573 | * be set when an interface is set UP but not associated or scanning, but | |
574 | * it can also be unset in that case when monitor interfaces are active. | |
6b301cdf JB |
575 | */ |
576 | enum ieee80211_conf_flags { | |
7a5158ef | 577 | IEEE80211_CONF_RADIOTAP = (1<<0), |
ae5eb026 | 578 | IEEE80211_CONF_PS = (1<<1), |
5cff20e6 | 579 | IEEE80211_CONF_IDLE = (1<<2), |
6b301cdf | 580 | }; |
f0706e82 | 581 | |
7a5158ef | 582 | |
e8975581 JB |
583 | /** |
584 | * enum ieee80211_conf_changed - denotes which configuration changed | |
585 | * | |
e8975581 JB |
586 | * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed |
587 | * @IEEE80211_CONF_CHANGE_RADIOTAP: the radiotap flag changed | |
e255d5eb | 588 | * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed |
e8975581 | 589 | * @IEEE80211_CONF_CHANGE_POWER: the TX power changed |
4797938c | 590 | * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed |
9124b077 | 591 | * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed |
5cff20e6 | 592 | * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed |
e8975581 JB |
593 | */ |
594 | enum ieee80211_conf_changed { | |
e8975581 JB |
595 | IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), |
596 | IEEE80211_CONF_CHANGE_RADIOTAP = BIT(3), | |
597 | IEEE80211_CONF_CHANGE_PS = BIT(4), | |
e255d5eb JB |
598 | IEEE80211_CONF_CHANGE_POWER = BIT(5), |
599 | IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), | |
600 | IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), | |
5cff20e6 | 601 | IEEE80211_CONF_CHANGE_IDLE = BIT(8), |
e8975581 JB |
602 | }; |
603 | ||
f0706e82 JB |
604 | /** |
605 | * struct ieee80211_conf - configuration of the device | |
606 | * | |
607 | * This struct indicates how the driver shall configure the hardware. | |
608 | * | |
04fe2037 JB |
609 | * @flags: configuration flags defined above |
610 | * | |
ea95bba4 | 611 | * @listen_interval: listen interval in units of beacon interval |
9ccebe61 | 612 | * @max_sleep_period: the maximum number of beacon intervals to sleep for |
04fe2037 JB |
613 | * before checking the beacon for a TIM bit (managed mode only); this |
614 | * value will be only achievable between DTIM frames, the hardware | |
615 | * needs to check for the multicast traffic bit in DTIM beacons. | |
616 | * This variable is valid only when the CONF_PS flag is set. | |
617 | * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the | |
618 | * powersave documentation below. This variable is valid only when | |
619 | * the CONF_PS flag is set. | |
620 | * | |
8318d78a | 621 | * @power_level: requested transmit power (in dBm) |
04fe2037 | 622 | * |
8318d78a | 623 | * @channel: the channel to tune to |
4797938c | 624 | * @channel_type: the channel (HT) type |
04fe2037 | 625 | * |
9124b077 JB |
626 | * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame |
627 | * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, | |
628 | * but actually means the number of transmissions not the number of retries | |
629 | * @short_frame_max_tx_count: Maximum number of transmissions for a "short" | |
630 | * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the | |
631 | * number of transmissions not the number of retries | |
f0706e82 JB |
632 | */ |
633 | struct ieee80211_conf { | |
6b301cdf | 634 | u32 flags; |
46f2c4bd | 635 | int power_level, dynamic_ps_timeout; |
9ccebe61 | 636 | int max_sleep_period; |
10816d40 | 637 | |
e8975581 | 638 | u16 listen_interval; |
e8975581 | 639 | |
9124b077 JB |
640 | u8 long_frame_max_tx_count, short_frame_max_tx_count; |
641 | ||
8318d78a | 642 | struct ieee80211_channel *channel; |
4797938c | 643 | enum nl80211_channel_type channel_type; |
f0706e82 JB |
644 | }; |
645 | ||
32bfd35d JB |
646 | /** |
647 | * struct ieee80211_vif - per-interface data | |
648 | * | |
649 | * Data in this structure is continually present for driver | |
650 | * use during the life of a virtual interface. | |
651 | * | |
51fb61e7 | 652 | * @type: type of this virtual interface |
bda3933a JB |
653 | * @bss_conf: BSS configuration for this interface, either our own |
654 | * or the BSS we're associated to | |
32bfd35d JB |
655 | * @drv_priv: data area for driver use, will always be aligned to |
656 | * sizeof(void *). | |
657 | */ | |
658 | struct ieee80211_vif { | |
05c914fe | 659 | enum nl80211_iftype type; |
bda3933a | 660 | struct ieee80211_bss_conf bss_conf; |
32bfd35d JB |
661 | /* must be last */ |
662 | u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); | |
663 | }; | |
664 | ||
902acc78 JB |
665 | static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) |
666 | { | |
667 | #ifdef CONFIG_MAC80211_MESH | |
05c914fe | 668 | return vif->type == NL80211_IFTYPE_MESH_POINT; |
902acc78 JB |
669 | #endif |
670 | return false; | |
671 | } | |
672 | ||
f0706e82 JB |
673 | /** |
674 | * struct ieee80211_if_init_conf - initial configuration of an interface | |
675 | * | |
32bfd35d JB |
676 | * @vif: pointer to a driver-use per-interface structure. The pointer |
677 | * itself is also used for various functions including | |
678 | * ieee80211_beacon_get() and ieee80211_get_buffered_bc(). | |
05c914fe | 679 | * @type: one of &enum nl80211_iftype constants. Determines the type of |
f0706e82 JB |
680 | * added/removed interface. |
681 | * @mac_addr: pointer to MAC address of the interface. This pointer is valid | |
682 | * until the interface is removed (i.e. it cannot be used after | |
683 | * remove_interface() callback was called for this interface). | |
684 | * | |
685 | * This structure is used in add_interface() and remove_interface() | |
686 | * callbacks of &struct ieee80211_hw. | |
4480f15c JB |
687 | * |
688 | * When you allow multiple interfaces to be added to your PHY, take care | |
689 | * that the hardware can actually handle multiple MAC addresses. However, | |
690 | * also take care that when there's no interface left with mac_addr != %NULL | |
691 | * you remove the MAC address from the device to avoid acknowledging packets | |
692 | * in pure monitor mode. | |
f0706e82 JB |
693 | */ |
694 | struct ieee80211_if_init_conf { | |
05c914fe | 695 | enum nl80211_iftype type; |
32bfd35d | 696 | struct ieee80211_vif *vif; |
f0706e82 JB |
697 | void *mac_addr; |
698 | }; | |
699 | ||
7ac1bd6a JB |
700 | /** |
701 | * enum ieee80211_key_alg - key algorithm | |
7ac1bd6a JB |
702 | * @ALG_WEP: WEP40 or WEP104 |
703 | * @ALG_TKIP: TKIP | |
704 | * @ALG_CCMP: CCMP (AES) | |
3cfcf6ac | 705 | * @ALG_AES_CMAC: AES-128-CMAC |
7ac1bd6a | 706 | */ |
ea49c359 | 707 | enum ieee80211_key_alg { |
8f20fc24 JB |
708 | ALG_WEP, |
709 | ALG_TKIP, | |
710 | ALG_CCMP, | |
3cfcf6ac | 711 | ALG_AES_CMAC, |
ea49c359 | 712 | }; |
f0706e82 | 713 | |
7ac1bd6a JB |
714 | /** |
715 | * enum ieee80211_key_flags - key flags | |
716 | * | |
717 | * These flags are used for communication about keys between the driver | |
718 | * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. | |
719 | * | |
720 | * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates | |
721 | * that the STA this key will be used with could be using QoS. | |
722 | * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the | |
723 | * driver to indicate that it requires IV generation for this | |
724 | * particular key. | |
725 | * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by | |
726 | * the driver for a TKIP key if it requires Michael MIC | |
727 | * generation in software. | |
c6adbd21 ID |
728 | * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates |
729 | * that the key is pairwise rather then a shared key. | |
1f7d77ab JM |
730 | * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a |
731 | * CCMP key if it requires CCMP encryption of management frames (MFP) to | |
732 | * be done in software. | |
7848ba7d | 733 | */ |
7ac1bd6a JB |
734 | enum ieee80211_key_flags { |
735 | IEEE80211_KEY_FLAG_WMM_STA = 1<<0, | |
736 | IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, | |
737 | IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, | |
c6adbd21 | 738 | IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, |
1f7d77ab | 739 | IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, |
7ac1bd6a | 740 | }; |
11a843b7 | 741 | |
7ac1bd6a JB |
742 | /** |
743 | * struct ieee80211_key_conf - key information | |
744 | * | |
745 | * This key information is given by mac80211 to the driver by | |
746 | * the set_key() callback in &struct ieee80211_ops. | |
747 | * | |
748 | * @hw_key_idx: To be set by the driver, this is the key index the driver | |
749 | * wants to be given when a frame is transmitted and needs to be | |
6a7664d4 | 750 | * encrypted in hardware. |
7ac1bd6a JB |
751 | * @alg: The key algorithm. |
752 | * @flags: key flags, see &enum ieee80211_key_flags. | |
753 | * @keyidx: the key index (0-3) | |
754 | * @keylen: key material length | |
ffd7891d LR |
755 | * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) |
756 | * data block: | |
757 | * - Temporal Encryption Key (128 bits) | |
758 | * - Temporal Authenticator Tx MIC Key (64 bits) | |
759 | * - Temporal Authenticator Rx MIC Key (64 bits) | |
dc822b5d JB |
760 | * @icv_len: The ICV length for this key type |
761 | * @iv_len: The IV length for this key type | |
7ac1bd6a | 762 | */ |
f0706e82 | 763 | struct ieee80211_key_conf { |
ea49c359 | 764 | enum ieee80211_key_alg alg; |
76708dee FF |
765 | u8 icv_len; |
766 | u8 iv_len; | |
6a7664d4 | 767 | u8 hw_key_idx; |
11a843b7 | 768 | u8 flags; |
11a843b7 | 769 | s8 keyidx; |
11a843b7 | 770 | u8 keylen; |
f0706e82 JB |
771 | u8 key[0]; |
772 | }; | |
773 | ||
7ac1bd6a JB |
774 | /** |
775 | * enum set_key_cmd - key command | |
776 | * | |
777 | * Used with the set_key() callback in &struct ieee80211_ops, this | |
778 | * indicates whether a key is being removed or added. | |
779 | * | |
780 | * @SET_KEY: a key is set | |
781 | * @DISABLE_KEY: a key must be disabled | |
782 | */ | |
ea49c359 | 783 | enum set_key_cmd { |
11a843b7 | 784 | SET_KEY, DISABLE_KEY, |
ea49c359 | 785 | }; |
f0706e82 | 786 | |
17741cdc JB |
787 | /** |
788 | * struct ieee80211_sta - station table entry | |
789 | * | |
790 | * A station table entry represents a station we are possibly | |
791 | * communicating with. Since stations are RCU-managed in | |
792 | * mac80211, any ieee80211_sta pointer you get access to must | |
793 | * either be protected by rcu_read_lock() explicitly or implicitly, | |
794 | * or you must take good care to not use such a pointer after a | |
795 | * call to your sta_notify callback that removed it. | |
796 | * | |
797 | * @addr: MAC address | |
798 | * @aid: AID we assigned to the station if we're an AP | |
323ce79a | 799 | * @supp_rates: Bitmap of supported rates (per band) |
ae5eb026 | 800 | * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities |
17741cdc JB |
801 | * @drv_priv: data area for driver use, will always be aligned to |
802 | * sizeof(void *), size is determined in hw information. | |
803 | */ | |
804 | struct ieee80211_sta { | |
881d948c | 805 | u32 supp_rates[IEEE80211_NUM_BANDS]; |
17741cdc JB |
806 | u8 addr[ETH_ALEN]; |
807 | u16 aid; | |
d9fe60de | 808 | struct ieee80211_sta_ht_cap ht_cap; |
17741cdc JB |
809 | |
810 | /* must be last */ | |
811 | u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); | |
812 | }; | |
813 | ||
478f8d2b TW |
814 | /** |
815 | * enum sta_notify_cmd - sta notify command | |
816 | * | |
817 | * Used with the sta_notify() callback in &struct ieee80211_ops, this | |
89fad578 CL |
818 | * indicates addition and removal of a station to station table, |
819 | * or if a associated station made a power state transition. | |
478f8d2b TW |
820 | * |
821 | * @STA_NOTIFY_ADD: a station was added to the station table | |
822 | * @STA_NOTIFY_REMOVE: a station being removed from the station table | |
4571d3bf CL |
823 | * @STA_NOTIFY_SLEEP: a station is now sleeping |
824 | * @STA_NOTIFY_AWAKE: a sleeping station woke up | |
825 | */ | |
89fad578 CL |
826 | enum sta_notify_cmd { |
827 | STA_NOTIFY_ADD, STA_NOTIFY_REMOVE, | |
4571d3bf CL |
828 | STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, |
829 | }; | |
830 | ||
5d2cdcd4 EG |
831 | /** |
832 | * enum ieee80211_tkip_key_type - get tkip key | |
833 | * | |
834 | * Used by drivers which need to get a tkip key for skb. Some drivers need a | |
835 | * phase 1 key, others need a phase 2 key. A single function allows the driver | |
836 | * to get the key, this enum indicates what type of key is required. | |
837 | * | |
838 | * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key | |
839 | * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key | |
840 | */ | |
841 | enum ieee80211_tkip_key_type { | |
842 | IEEE80211_TKIP_P1_KEY, | |
843 | IEEE80211_TKIP_P2_KEY, | |
844 | }; | |
845 | ||
1bc0826c JB |
846 | /** |
847 | * enum ieee80211_hw_flags - hardware flags | |
848 | * | |
849 | * These flags are used to indicate hardware capabilities to | |
850 | * the stack. Generally, flags here should have their meaning | |
851 | * done in a way that the simplest hardware doesn't need setting | |
852 | * any particular flags. There are some exceptions to this rule, | |
853 | * however, so you are advised to review these flags carefully. | |
854 | * | |
1bc0826c JB |
855 | * @IEEE80211_HW_RX_INCLUDES_FCS: |
856 | * Indicates that received frames passed to the stack include | |
857 | * the FCS at the end. | |
858 | * | |
859 | * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: | |
860 | * Some wireless LAN chipsets buffer broadcast/multicast frames | |
861 | * for power saving stations in the hardware/firmware and others | |
862 | * rely on the host system for such buffering. This option is used | |
863 | * to configure the IEEE 802.11 upper layer to buffer broadcast and | |
864 | * multicast frames when there are power saving stations so that | |
546c80c9 | 865 | * the driver can fetch them with ieee80211_get_buffered_bc(). |
1bc0826c | 866 | * |
8318d78a JB |
867 | * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: |
868 | * Hardware is not capable of short slot operation on the 2.4 GHz band. | |
869 | * | |
870 | * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: | |
871 | * Hardware is not capable of receiving frames with short preamble on | |
872 | * the 2.4 GHz band. | |
566bfe5a BR |
873 | * |
874 | * @IEEE80211_HW_SIGNAL_UNSPEC: | |
875 | * Hardware can provide signal values but we don't know its units. We | |
876 | * expect values between 0 and @max_signal. | |
877 | * If possible please provide dB or dBm instead. | |
878 | * | |
566bfe5a BR |
879 | * @IEEE80211_HW_SIGNAL_DBM: |
880 | * Hardware gives signal values in dBm, decibel difference from | |
881 | * one milliwatt. This is the preferred method since it is standardized | |
882 | * between different devices. @max_signal does not need to be set. | |
883 | * | |
884 | * @IEEE80211_HW_NOISE_DBM: | |
885 | * Hardware can provide noise (radio interference) values in units dBm, | |
886 | * decibel difference from one milliwatt. | |
06ff47bc TW |
887 | * |
888 | * @IEEE80211_HW_SPECTRUM_MGMT: | |
889 | * Hardware supports spectrum management defined in 802.11h | |
890 | * Measurement, Channel Switch, Quieting, TPC | |
8b30b1fe S |
891 | * |
892 | * @IEEE80211_HW_AMPDU_AGGREGATION: | |
893 | * Hardware supports 11n A-MPDU aggregation. | |
520eb820 | 894 | * |
4be8c387 JB |
895 | * @IEEE80211_HW_SUPPORTS_PS: |
896 | * Hardware has power save support (i.e. can go to sleep). | |
897 | * | |
898 | * @IEEE80211_HW_PS_NULLFUNC_STACK: | |
899 | * Hardware requires nullfunc frame handling in stack, implies | |
900 | * stack support for dynamic PS. | |
901 | * | |
902 | * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: | |
903 | * Hardware has support for dynamic PS. | |
4375d083 JM |
904 | * |
905 | * @IEEE80211_HW_MFP_CAPABLE: | |
906 | * Hardware supports management frame protection (MFP, IEEE 802.11w). | |
04de8381 KV |
907 | * |
908 | * @IEEE80211_HW_BEACON_FILTER: | |
909 | * Hardware supports dropping of irrelevant beacon frames to | |
910 | * avoid waking up cpu. | |
1bc0826c JB |
911 | */ |
912 | enum ieee80211_hw_flags { | |
1bc0826c JB |
913 | IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, |
914 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, | |
8318d78a JB |
915 | IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, |
916 | IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, | |
566bfe5a | 917 | IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, |
7fee5372 JB |
918 | IEEE80211_HW_SIGNAL_DBM = 1<<6, |
919 | IEEE80211_HW_NOISE_DBM = 1<<7, | |
920 | IEEE80211_HW_SPECTRUM_MGMT = 1<<8, | |
921 | IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, | |
922 | IEEE80211_HW_SUPPORTS_PS = 1<<10, | |
923 | IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, | |
924 | IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, | |
925 | IEEE80211_HW_MFP_CAPABLE = 1<<13, | |
04de8381 | 926 | IEEE80211_HW_BEACON_FILTER = 1<<14, |
1bc0826c JB |
927 | }; |
928 | ||
7ac1bd6a JB |
929 | /** |
930 | * struct ieee80211_hw - hardware information and state | |
75a5f0cc JB |
931 | * |
932 | * This structure contains the configuration and hardware | |
933 | * information for an 802.11 PHY. | |
934 | * | |
935 | * @wiphy: This points to the &struct wiphy allocated for this | |
936 | * 802.11 PHY. You must fill in the @perm_addr and @dev | |
937 | * members of this structure using SET_IEEE80211_DEV() | |
8318d78a JB |
938 | * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported |
939 | * bands (with channels, bitrates) are registered here. | |
75a5f0cc JB |
940 | * |
941 | * @conf: &struct ieee80211_conf, device configuration, don't use. | |
942 | * | |
75a5f0cc JB |
943 | * @priv: pointer to private area that was allocated for driver use |
944 | * along with this structure. | |
945 | * | |
946 | * @flags: hardware flags, see &enum ieee80211_hw_flags. | |
947 | * | |
948 | * @extra_tx_headroom: headroom to reserve in each transmit skb | |
949 | * for use by the driver (e.g. for transmit headers.) | |
950 | * | |
951 | * @channel_change_time: time (in microseconds) it takes to change channels. | |
952 | * | |
566bfe5a BR |
953 | * @max_signal: Maximum value for signal (rssi) in RX information, used |
954 | * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB | |
75a5f0cc | 955 | * |
ea95bba4 TW |
956 | * @max_listen_interval: max listen interval in units of beacon interval |
957 | * that HW supports | |
958 | * | |
75a5f0cc | 959 | * @queues: number of available hardware transmit queues for |
e100bb64 JB |
960 | * data packets. WMM/QoS requires at least four, these |
961 | * queues need to have configurable access parameters. | |
962 | * | |
830f9038 JB |
963 | * @rate_control_algorithm: rate control algorithm for this hardware. |
964 | * If unset (NULL), the default algorithm will be used. Must be | |
965 | * set before calling ieee80211_register_hw(). | |
32bfd35d JB |
966 | * |
967 | * @vif_data_size: size (in bytes) of the drv_priv data area | |
968 | * within &struct ieee80211_vif. | |
17741cdc JB |
969 | * @sta_data_size: size (in bytes) of the drv_priv data area |
970 | * within &struct ieee80211_sta. | |
870abdf6 | 971 | * |
e6a9854b JB |
972 | * @max_rates: maximum number of alternate rate retry stages |
973 | * @max_rate_tries: maximum number of tries for each stage | |
7ac1bd6a | 974 | */ |
f0706e82 | 975 | struct ieee80211_hw { |
f0706e82 | 976 | struct ieee80211_conf conf; |
75a5f0cc | 977 | struct wiphy *wiphy; |
830f9038 | 978 | const char *rate_control_algorithm; |
f0706e82 | 979 | void *priv; |
75a5f0cc | 980 | u32 flags; |
f0706e82 | 981 | unsigned int extra_tx_headroom; |
f0706e82 | 982 | int channel_change_time; |
32bfd35d | 983 | int vif_data_size; |
17741cdc | 984 | int sta_data_size; |
ea95bba4 | 985 | u16 queues; |
ea95bba4 | 986 | u16 max_listen_interval; |
f0706e82 | 987 | s8 max_signal; |
e6a9854b JB |
988 | u8 max_rates; |
989 | u8 max_rate_tries; | |
f0706e82 JB |
990 | }; |
991 | ||
9a95371a LR |
992 | /** |
993 | * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy | |
994 | * | |
995 | * @wiphy: the &struct wiphy which we want to query | |
996 | * | |
997 | * mac80211 drivers can use this to get to their respective | |
998 | * &struct ieee80211_hw. Drivers wishing to get to their own private | |
999 | * structure can then access it via hw->priv. Note that mac802111 drivers should | |
1000 | * not use wiphy_priv() to try to get their private driver structure as this | |
1001 | * is already used internally by mac80211. | |
1002 | */ | |
1003 | struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); | |
1004 | ||
75a5f0cc JB |
1005 | /** |
1006 | * SET_IEEE80211_DEV - set device for 802.11 hardware | |
1007 | * | |
1008 | * @hw: the &struct ieee80211_hw to set the device for | |
1009 | * @dev: the &struct device of this 802.11 device | |
1010 | */ | |
f0706e82 JB |
1011 | static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) |
1012 | { | |
1013 | set_wiphy_dev(hw->wiphy, dev); | |
1014 | } | |
1015 | ||
75a5f0cc | 1016 | /** |
e37d4dff | 1017 | * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware |
75a5f0cc JB |
1018 | * |
1019 | * @hw: the &struct ieee80211_hw to set the MAC address for | |
1020 | * @addr: the address to set | |
1021 | */ | |
f0706e82 JB |
1022 | static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) |
1023 | { | |
1024 | memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); | |
1025 | } | |
1026 | ||
2e92e6f2 JB |
1027 | static inline struct ieee80211_rate * |
1028 | ieee80211_get_tx_rate(const struct ieee80211_hw *hw, | |
e039fa4a | 1029 | const struct ieee80211_tx_info *c) |
2e92e6f2 | 1030 | { |
e6a9854b | 1031 | if (WARN_ON(c->control.rates[0].idx < 0)) |
2e92e6f2 | 1032 | return NULL; |
e6a9854b | 1033 | return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; |
2e92e6f2 JB |
1034 | } |
1035 | ||
1036 | static inline struct ieee80211_rate * | |
1037 | ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, | |
e039fa4a | 1038 | const struct ieee80211_tx_info *c) |
2e92e6f2 | 1039 | { |
e039fa4a | 1040 | if (c->control.rts_cts_rate_idx < 0) |
2e92e6f2 | 1041 | return NULL; |
e039fa4a | 1042 | return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; |
2e92e6f2 JB |
1043 | } |
1044 | ||
1045 | static inline struct ieee80211_rate * | |
1046 | ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, | |
870abdf6 | 1047 | const struct ieee80211_tx_info *c, int idx) |
2e92e6f2 | 1048 | { |
e6a9854b | 1049 | if (c->control.rates[idx + 1].idx < 0) |
2e92e6f2 | 1050 | return NULL; |
e6a9854b | 1051 | return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; |
2e92e6f2 JB |
1052 | } |
1053 | ||
75a5f0cc JB |
1054 | /** |
1055 | * DOC: Hardware crypto acceleration | |
1056 | * | |
1057 | * mac80211 is capable of taking advantage of many hardware | |
1058 | * acceleration designs for encryption and decryption operations. | |
1059 | * | |
1060 | * The set_key() callback in the &struct ieee80211_ops for a given | |
1061 | * device is called to enable hardware acceleration of encryption and | |
dc822b5d JB |
1062 | * decryption. The callback takes a @sta parameter that will be NULL |
1063 | * for default keys or keys used for transmission only, or point to | |
1064 | * the station information for the peer for individual keys. | |
75a5f0cc JB |
1065 | * Multiple transmission keys with the same key index may be used when |
1066 | * VLANs are configured for an access point. | |
4150c572 | 1067 | * |
75a5f0cc JB |
1068 | * When transmitting, the TX control data will use the @hw_key_idx |
1069 | * selected by the driver by modifying the &struct ieee80211_key_conf | |
1070 | * pointed to by the @key parameter to the set_key() function. | |
1071 | * | |
1072 | * The set_key() call for the %SET_KEY command should return 0 if | |
1073 | * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be | |
1074 | * added; if you return 0 then hw_key_idx must be assigned to the | |
1075 | * hardware key index, you are free to use the full u8 range. | |
1076 | * | |
1077 | * When the cmd is %DISABLE_KEY then it must succeed. | |
1078 | * | |
1079 | * Note that it is permissible to not decrypt a frame even if a key | |
1080 | * for it has been uploaded to hardware, the stack will not make any | |
1081 | * decision based on whether a key has been uploaded or not but rather | |
1082 | * based on the receive flags. | |
1083 | * | |
1084 | * The &struct ieee80211_key_conf structure pointed to by the @key | |
1085 | * parameter is guaranteed to be valid until another call to set_key() | |
1086 | * removes it, but it can only be used as a cookie to differentiate | |
1087 | * keys. | |
9ae4fda3 EG |
1088 | * |
1089 | * In TKIP some HW need to be provided a phase 1 key, for RX decryption | |
1090 | * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key | |
1091 | * handler. | |
1092 | * The update_tkip_key() call updates the driver with the new phase 1 key. | |
1093 | * This happens everytime the iv16 wraps around (every 65536 packets). The | |
1094 | * set_key() call will happen only once for each key (unless the AP did | |
1095 | * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is | |
e37d4dff | 1096 | * provided by update_tkip_key only. The trigger that makes mac80211 call this |
9ae4fda3 | 1097 | * handler is software decryption with wrap around of iv16. |
4150c572 | 1098 | */ |
75a5f0cc | 1099 | |
4be8c387 JB |
1100 | /** |
1101 | * DOC: Powersave support | |
1102 | * | |
1103 | * mac80211 has support for various powersave implementations. | |
1104 | * | |
1105 | * First, it can support hardware that handles all powersaving by | |
1106 | * itself, such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS | |
1107 | * hardware flag. In that case, it will be told about the desired | |
1108 | * powersave mode depending on the association status, and the driver | |
1109 | * must take care of sending nullfunc frames when necessary, i.e. when | |
1110 | * entering and leaving powersave mode. The driver is required to look at | |
1111 | * the AID in beacons and signal to the AP that it woke up when it finds | |
1112 | * traffic directed to it. This mode supports dynamic PS by simply | |
1113 | * enabling/disabling PS. | |
1114 | * | |
1115 | * Additionally, such hardware may set the %IEEE80211_HW_SUPPORTS_DYNAMIC_PS | |
1116 | * flag to indicate that it can support dynamic PS mode itself (see below). | |
1117 | * | |
1118 | * Other hardware designs cannot send nullfunc frames by themselves and also | |
1119 | * need software support for parsing the TIM bitmap. This is also supported | |
1120 | * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and | |
1121 | * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still | |
955394c9 JB |
1122 | * required to pass up beacons. The hardware is still required to handle |
1123 | * waking up for multicast traffic; if it cannot the driver must handle that | |
1124 | * as best as it can, mac80211 is too slow. | |
4be8c387 JB |
1125 | * |
1126 | * Dynamic powersave mode is an extension to normal powersave mode in which | |
1127 | * the hardware stays awake for a user-specified period of time after sending | |
1128 | * a frame so that reply frames need not be buffered and therefore delayed | |
1129 | * to the next wakeup. This can either be supported by hardware, in which case | |
1130 | * the driver needs to look at the @dynamic_ps_timeout hardware configuration | |
1131 | * value, or by the stack if all nullfunc handling is in the stack. | |
1132 | */ | |
1133 | ||
04de8381 KV |
1134 | /** |
1135 | * DOC: Beacon filter support | |
1136 | * | |
1137 | * Some hardware have beacon filter support to reduce host cpu wakeups | |
1138 | * which will reduce system power consumption. It usuallly works so that | |
1139 | * the firmware creates a checksum of the beacon but omits all constantly | |
1140 | * changing elements (TSF, TIM etc). Whenever the checksum changes the | |
1141 | * beacon is forwarded to the host, otherwise it will be just dropped. That | |
1142 | * way the host will only receive beacons where some relevant information | |
1143 | * (for example ERP protection or WMM settings) have changed. | |
1144 | * | |
955394c9 JB |
1145 | * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER |
1146 | * hardware capability. The driver needs to enable beacon filter support | |
1147 | * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When | |
1148 | * power save is enabled, the stack will not check for beacon loss and the | |
1149 | * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). | |
1150 | * | |
1151 | * The time (or number of beacons missed) until the firmware notifies the | |
1152 | * driver of a beacon loss event (which in turn causes the driver to call | |
1153 | * ieee80211_beacon_loss()) should be configurable and will be controlled | |
1154 | * by mac80211 and the roaming algorithm in the future. | |
1155 | * | |
1156 | * Since there may be constantly changing information elements that nothing | |
1157 | * in the software stack cares about, we will, in the future, have mac80211 | |
1158 | * tell the driver which information elements are interesting in the sense | |
1159 | * that we want to see changes in them. This will include | |
1160 | * - a list of information element IDs | |
1161 | * - a list of OUIs for the vendor information element | |
1162 | * | |
1163 | * Ideally, the hardware would filter out any beacons without changes in the | |
1164 | * requested elements, but if it cannot support that it may, at the expense | |
1165 | * of some efficiency, filter out only a subset. For example, if the device | |
1166 | * doesn't support checking for OUIs it should pass up all changes in all | |
1167 | * vendor information elements. | |
1168 | * | |
1169 | * Note that change, for the sake of simplification, also includes information | |
1170 | * elements appearing or disappearing from the beacon. | |
1171 | * | |
1172 | * Some hardware supports an "ignore list" instead, just make sure nothing | |
1173 | * that was requested is on the ignore list, and include commonly changing | |
1174 | * information element IDs in the ignore list, for example 11 (BSS load) and | |
1175 | * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, | |
1176 | * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility | |
1177 | * it could also include some currently unused IDs. | |
1178 | * | |
1179 | * | |
1180 | * In addition to these capabilities, hardware should support notifying the | |
1181 | * host of changes in the beacon RSSI. This is relevant to implement roaming | |
1182 | * when no traffic is flowing (when traffic is flowing we see the RSSI of | |
1183 | * the received data packets). This can consist in notifying the host when | |
1184 | * the RSSI changes significantly or when it drops below or rises above | |
1185 | * configurable thresholds. In the future these thresholds will also be | |
1186 | * configured by mac80211 (which gets them from userspace) to implement | |
1187 | * them as the roaming algorithm requires. | |
1188 | * | |
1189 | * If the hardware cannot implement this, the driver should ask it to | |
1190 | * periodically pass beacon frames to the host so that software can do the | |
1191 | * signal strength threshold checking. | |
04de8381 KV |
1192 | */ |
1193 | ||
75a5f0cc JB |
1194 | /** |
1195 | * DOC: Frame filtering | |
1196 | * | |
1197 | * mac80211 requires to see many management frames for proper | |
1198 | * operation, and users may want to see many more frames when | |
1199 | * in monitor mode. However, for best CPU usage and power consumption, | |
1200 | * having as few frames as possible percolate through the stack is | |
1201 | * desirable. Hence, the hardware should filter as much as possible. | |
1202 | * | |
1203 | * To achieve this, mac80211 uses filter flags (see below) to tell | |
1204 | * the driver's configure_filter() function which frames should be | |
1205 | * passed to mac80211 and which should be filtered out. | |
1206 | * | |
3ac64bee JB |
1207 | * Before configure_filter() is invoked, the prepare_multicast() |
1208 | * callback is invoked with the parameters @mc_count and @mc_list | |
1209 | * for the combined multicast address list of all virtual interfaces. | |
1210 | * It's use is optional, and it returns a u64 that is passed to | |
1211 | * configure_filter(). Additionally, configure_filter() has the | |
1212 | * arguments @changed_flags telling which flags were changed and | |
1213 | * @total_flags with the new flag states. | |
75a5f0cc JB |
1214 | * |
1215 | * If your device has no multicast address filters your driver will | |
1216 | * need to check both the %FIF_ALLMULTI flag and the @mc_count | |
1217 | * parameter to see whether multicast frames should be accepted | |
1218 | * or dropped. | |
1219 | * | |
d0f5afbe MB |
1220 | * All unsupported flags in @total_flags must be cleared. |
1221 | * Hardware does not support a flag if it is incapable of _passing_ | |
1222 | * the frame to the stack. Otherwise the driver must ignore | |
1223 | * the flag, but not clear it. | |
1224 | * You must _only_ clear the flag (announce no support for the | |
1225 | * flag to mac80211) if you are not able to pass the packet type | |
1226 | * to the stack (so the hardware always filters it). | |
1227 | * So for example, you should clear @FIF_CONTROL, if your hardware | |
1228 | * always filters control frames. If your hardware always passes | |
1229 | * control frames to the kernel and is incapable of filtering them, | |
1230 | * you do _not_ clear the @FIF_CONTROL flag. | |
1231 | * This rule applies to all other FIF flags as well. | |
4150c572 | 1232 | */ |
75a5f0cc JB |
1233 | |
1234 | /** | |
1235 | * enum ieee80211_filter_flags - hardware filter flags | |
1236 | * | |
1237 | * These flags determine what the filter in hardware should be | |
1238 | * programmed to let through and what should not be passed to the | |
1239 | * stack. It is always safe to pass more frames than requested, | |
1240 | * but this has negative impact on power consumption. | |
1241 | * | |
1242 | * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, | |
1243 | * think of the BSS as your network segment and then this corresponds | |
1244 | * to the regular ethernet device promiscuous mode. | |
1245 | * | |
1246 | * @FIF_ALLMULTI: pass all multicast frames, this is used if requested | |
1247 | * by the user or if the hardware is not capable of filtering by | |
1248 | * multicast address. | |
1249 | * | |
1250 | * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the | |
1251 | * %RX_FLAG_FAILED_FCS_CRC for them) | |
1252 | * | |
1253 | * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set | |
1254 | * the %RX_FLAG_FAILED_PLCP_CRC for them | |
1255 | * | |
1256 | * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate | |
1257 | * to the hardware that it should not filter beacons or probe responses | |
1258 | * by BSSID. Filtering them can greatly reduce the amount of processing | |
1259 | * mac80211 needs to do and the amount of CPU wakeups, so you should | |
1260 | * honour this flag if possible. | |
1261 | * | |
e3b90ca2 IP |
1262 | * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS |
1263 | * is not set then only those addressed to this station. | |
75a5f0cc JB |
1264 | * |
1265 | * @FIF_OTHER_BSS: pass frames destined to other BSSes | |
e3b90ca2 IP |
1266 | * |
1267 | * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only | |
1268 | * those addressed to this station. | |
4150c572 | 1269 | */ |
75a5f0cc JB |
1270 | enum ieee80211_filter_flags { |
1271 | FIF_PROMISC_IN_BSS = 1<<0, | |
1272 | FIF_ALLMULTI = 1<<1, | |
1273 | FIF_FCSFAIL = 1<<2, | |
1274 | FIF_PLCPFAIL = 1<<3, | |
1275 | FIF_BCN_PRBRESP_PROMISC = 1<<4, | |
1276 | FIF_CONTROL = 1<<5, | |
1277 | FIF_OTHER_BSS = 1<<6, | |
e3b90ca2 | 1278 | FIF_PSPOLL = 1<<7, |
75a5f0cc JB |
1279 | }; |
1280 | ||
1b7d03ac RR |
1281 | /** |
1282 | * enum ieee80211_ampdu_mlme_action - A-MPDU actions | |
1283 | * | |
1284 | * These flags are used with the ampdu_action() callback in | |
1285 | * &struct ieee80211_ops to indicate which action is needed. | |
1286 | * @IEEE80211_AMPDU_RX_START: start Rx aggregation | |
1287 | * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation | |
0df3ef45 RR |
1288 | * @IEEE80211_AMPDU_TX_START: start Tx aggregation |
1289 | * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation | |
b1720231 | 1290 | * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational |
1b7d03ac RR |
1291 | */ |
1292 | enum ieee80211_ampdu_mlme_action { | |
1293 | IEEE80211_AMPDU_RX_START, | |
1294 | IEEE80211_AMPDU_RX_STOP, | |
0df3ef45 RR |
1295 | IEEE80211_AMPDU_TX_START, |
1296 | IEEE80211_AMPDU_TX_STOP, | |
b1720231 | 1297 | IEEE80211_AMPDU_TX_OPERATIONAL, |
1b7d03ac | 1298 | }; |
75a5f0cc JB |
1299 | |
1300 | /** | |
1301 | * struct ieee80211_ops - callbacks from mac80211 to the driver | |
1302 | * | |
1303 | * This structure contains various callbacks that the driver may | |
1304 | * handle or, in some cases, must handle, for example to configure | |
1305 | * the hardware to a new channel or to transmit a frame. | |
1306 | * | |
1307 | * @tx: Handler that 802.11 module calls for each transmitted frame. | |
1308 | * skb contains the buffer starting from the IEEE 802.11 header. | |
1309 | * The low-level driver should send the frame out based on | |
eefce91a JB |
1310 | * configuration in the TX control data. This handler should, |
1311 | * preferably, never fail and stop queues appropriately, more | |
1312 | * importantly, however, it must never fail for A-MPDU-queues. | |
6dd1bf31 BC |
1313 | * This function should return NETDEV_TX_OK except in very |
1314 | * limited cases. | |
eefce91a | 1315 | * Must be implemented and atomic. |
75a5f0cc JB |
1316 | * |
1317 | * @start: Called before the first netdevice attached to the hardware | |
1318 | * is enabled. This should turn on the hardware and must turn on | |
1319 | * frame reception (for possibly enabled monitor interfaces.) | |
1320 | * Returns negative error codes, these may be seen in userspace, | |
1321 | * or zero. | |
1322 | * When the device is started it should not have a MAC address | |
1323 | * to avoid acknowledging frames before a non-monitor device | |
1324 | * is added. | |
1325 | * Must be implemented. | |
1326 | * | |
1327 | * @stop: Called after last netdevice attached to the hardware | |
1328 | * is disabled. This should turn off the hardware (at least | |
1329 | * it must turn off frame reception.) | |
1330 | * May be called right after add_interface if that rejects | |
42935eca LR |
1331 | * an interface. If you added any work onto the mac80211 workqueue |
1332 | * you should ensure to cancel it on this callback. | |
75a5f0cc JB |
1333 | * Must be implemented. |
1334 | * | |
1335 | * @add_interface: Called when a netdevice attached to the hardware is | |
e37d4dff | 1336 | * enabled. Because it is not called for monitor mode devices, @start |
75a5f0cc JB |
1337 | * and @stop must be implemented. |
1338 | * The driver should perform any initialization it needs before | |
1339 | * the device can be enabled. The initial configuration for the | |
1340 | * interface is given in the conf parameter. | |
1341 | * The callback may refuse to add an interface by returning a | |
1342 | * negative error code (which will be seen in userspace.) | |
1343 | * Must be implemented. | |
1344 | * | |
1345 | * @remove_interface: Notifies a driver that an interface is going down. | |
1346 | * The @stop callback is called after this if it is the last interface | |
1347 | * and no monitor interfaces are present. | |
1348 | * When all interfaces are removed, the MAC address in the hardware | |
1349 | * must be cleared so the device no longer acknowledges packets, | |
1350 | * the mac_addr member of the conf structure is, however, set to the | |
1351 | * MAC address of the device going away. | |
1352 | * Hence, this callback must be implemented. | |
1353 | * | |
1354 | * @config: Handler for configuration requests. IEEE 802.11 code calls this | |
1355 | * function to change hardware configuration, e.g., channel. | |
6dd1bf31 BC |
1356 | * This function should never fail but returns a negative error code |
1357 | * if it does. | |
75a5f0cc | 1358 | * |
471b3efd JB |
1359 | * @bss_info_changed: Handler for configuration requests related to BSS |
1360 | * parameters that may vary during BSS's lifespan, and may affect low | |
1361 | * level driver (e.g. assoc/disassoc status, erp parameters). | |
1362 | * This function should not be used if no BSS has been set, unless | |
1363 | * for association indication. The @changed parameter indicates which | |
d18ef29f | 1364 | * of the bss parameters has changed when a call is made. |
471b3efd | 1365 | * |
3ac64bee JB |
1366 | * @prepare_multicast: Prepare for multicast filter configuration. |
1367 | * This callback is optional, and its return value is passed | |
1368 | * to configure_filter(). This callback must be atomic. | |
1369 | * | |
75a5f0cc JB |
1370 | * @configure_filter: Configure the device's RX filter. |
1371 | * See the section "Frame filtering" for more information. | |
3ac64bee | 1372 | * This callback must be implemented. |
75a5f0cc | 1373 | * |
546c80c9 | 1374 | * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit |
17741cdc | 1375 | * must be set or cleared for a given STA. Must be atomic. |
75a5f0cc JB |
1376 | * |
1377 | * @set_key: See the section "Hardware crypto acceleration" | |
1378 | * This callback can sleep, and is only called between add_interface | |
dc822b5d JB |
1379 | * and remove_interface calls, i.e. while the given virtual interface |
1380 | * is enabled. | |
6dd1bf31 | 1381 | * Returns a negative error code if the key can't be added. |
75a5f0cc | 1382 | * |
9ae4fda3 EG |
1383 | * @update_tkip_key: See the section "Hardware crypto acceleration" |
1384 | * This callback will be called in the context of Rx. Called for drivers | |
1385 | * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. | |
1386 | * | |
75a5f0cc | 1387 | * @hw_scan: Ask the hardware to service the scan request, no need to start |
8318d78a | 1388 | * the scan state machine in stack. The scan must honour the channel |
9050bdd8 KV |
1389 | * configuration done by the regulatory agent in the wiphy's |
1390 | * registered bands. The hardware (or the driver) needs to make sure | |
de95a54b JB |
1391 | * that power save is disabled. |
1392 | * The @req ie/ie_len members are rewritten by mac80211 to contain the | |
1393 | * entire IEs after the SSID, so that drivers need not look at these | |
1394 | * at all but just send them after the SSID -- mac80211 includes the | |
1395 | * (extended) supported rates and HT information (where applicable). | |
1396 | * When the scan finishes, ieee80211_scan_completed() must be called; | |
1397 | * note that it also must be called when the scan cannot finish due to | |
1398 | * any error unless this callback returned a negative error code. | |
75a5f0cc | 1399 | * |
80e775bf MB |
1400 | * @sw_scan_start: Notifier function that is called just before a software scan |
1401 | * is started. Can be NULL, if the driver doesn't need this notification. | |
1402 | * | |
1403 | * @sw_scan_complete: Notifier function that is called just after a software scan | |
1404 | * finished. Can be NULL, if the driver doesn't need this notification. | |
1405 | * | |
6dd1bf31 BC |
1406 | * @get_stats: Return low-level statistics. |
1407 | * Returns zero if statistics are available. | |
75a5f0cc | 1408 | * |
62da92fb JB |
1409 | * @get_tkip_seq: If your device implements TKIP encryption in hardware this |
1410 | * callback should be provided to read the TKIP transmit IVs (both IV32 | |
1411 | * and IV16) for the given key from hardware. | |
75a5f0cc JB |
1412 | * |
1413 | * @set_rts_threshold: Configuration of RTS threshold (if device needs it) | |
1414 | * | |
89fad578 CL |
1415 | * @sta_notify: Notifies low level driver about addition, removal or power |
1416 | * state transition of an associated station, AP, IBSS/WDS/mesh peer etc. | |
1417 | * Must be atomic. | |
4571d3bf | 1418 | * |
75a5f0cc | 1419 | * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), |
fe3fa827 | 1420 | * bursting) for a hardware TX queue. |
6dd1bf31 | 1421 | * Returns a negative error code on failure. |
75a5f0cc JB |
1422 | * |
1423 | * @get_tx_stats: Get statistics of the current TX queue status. This is used | |
1424 | * to get number of currently queued packets (queue length), maximum queue | |
1425 | * size (limit), and total number of packets sent using each TX queue | |
e4e72fb4 JB |
1426 | * (count). The 'stats' pointer points to an array that has hw->queues |
1427 | * items. | |
75a5f0cc JB |
1428 | * |
1429 | * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, | |
3b5d665b | 1430 | * this is only used for IBSS mode BSSID merging and debugging. Is not a |
7b08b3b4 | 1431 | * required function. |
3b5d665b AF |
1432 | * |
1433 | * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. | |
1434 | * Currently, this is only used for IBSS mode debugging. Is not a | |
7b08b3b4 | 1435 | * required function. |
75a5f0cc JB |
1436 | * |
1437 | * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize | |
1438 | * with other STAs in the IBSS. This is only used in IBSS mode. This | |
1439 | * function is optional if the firmware/hardware takes full care of | |
1440 | * TSF synchronization. | |
1441 | * | |
75a5f0cc JB |
1442 | * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. |
1443 | * This is needed only for IBSS mode and the result of this function is | |
1444 | * used to determine whether to reply to Probe Requests. | |
6dd1bf31 | 1445 | * Returns non-zero if this device sent the last beacon. |
d3c990fb | 1446 | * |
1b7d03ac RR |
1447 | * @ampdu_action: Perform a certain A-MPDU action |
1448 | * The RA/TID combination determines the destination and TID we want | |
1449 | * the ampdu action to be performed for. The action is defined through | |
1450 | * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) | |
6dd1bf31 | 1451 | * is the first frame we expect to perform the action on. Notice |
0df3ef45 | 1452 | * that TX/RX_STOP can pass NULL for this parameter. |
6dd1bf31 | 1453 | * Returns a negative error code on failure. |
1f87f7d3 JB |
1454 | * |
1455 | * @rfkill_poll: Poll rfkill hardware state. If you need this, you also | |
1456 | * need to set wiphy->rfkill_poll to %true before registration, | |
1457 | * and need to call wiphy_rfkill_set_hw_state() in the callback. | |
aff89a9b JB |
1458 | * |
1459 | * @testmode_cmd: Implement a cfg80211 test mode command. | |
75a5f0cc | 1460 | */ |
f0706e82 | 1461 | struct ieee80211_ops { |
e039fa4a | 1462 | int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); |
4150c572 | 1463 | int (*start)(struct ieee80211_hw *hw); |
4150c572 | 1464 | void (*stop)(struct ieee80211_hw *hw); |
f0706e82 JB |
1465 | int (*add_interface)(struct ieee80211_hw *hw, |
1466 | struct ieee80211_if_init_conf *conf); | |
f0706e82 JB |
1467 | void (*remove_interface)(struct ieee80211_hw *hw, |
1468 | struct ieee80211_if_init_conf *conf); | |
e8975581 | 1469 | int (*config)(struct ieee80211_hw *hw, u32 changed); |
471b3efd JB |
1470 | void (*bss_info_changed)(struct ieee80211_hw *hw, |
1471 | struct ieee80211_vif *vif, | |
1472 | struct ieee80211_bss_conf *info, | |
1473 | u32 changed); | |
3ac64bee JB |
1474 | u64 (*prepare_multicast)(struct ieee80211_hw *hw, |
1475 | int mc_count, struct dev_addr_list *mc_list); | |
4150c572 JB |
1476 | void (*configure_filter)(struct ieee80211_hw *hw, |
1477 | unsigned int changed_flags, | |
1478 | unsigned int *total_flags, | |
3ac64bee | 1479 | u64 multicast); |
17741cdc JB |
1480 | int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, |
1481 | bool set); | |
ea49c359 | 1482 | int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, |
dc822b5d | 1483 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
11a843b7 | 1484 | struct ieee80211_key_conf *key); |
9ae4fda3 EG |
1485 | void (*update_tkip_key)(struct ieee80211_hw *hw, |
1486 | struct ieee80211_key_conf *conf, const u8 *address, | |
1487 | u32 iv32, u16 *phase1key); | |
2a519311 JB |
1488 | int (*hw_scan)(struct ieee80211_hw *hw, |
1489 | struct cfg80211_scan_request *req); | |
80e775bf MB |
1490 | void (*sw_scan_start)(struct ieee80211_hw *hw); |
1491 | void (*sw_scan_complete)(struct ieee80211_hw *hw); | |
f0706e82 JB |
1492 | int (*get_stats)(struct ieee80211_hw *hw, |
1493 | struct ieee80211_low_level_stats *stats); | |
62da92fb JB |
1494 | void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, |
1495 | u32 *iv32, u16 *iv16); | |
f0706e82 | 1496 | int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); |
32bfd35d | 1497 | void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
17741cdc | 1498 | enum sta_notify_cmd, struct ieee80211_sta *sta); |
e100bb64 | 1499 | int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, |
f0706e82 | 1500 | const struct ieee80211_tx_queue_params *params); |
f0706e82 JB |
1501 | int (*get_tx_stats)(struct ieee80211_hw *hw, |
1502 | struct ieee80211_tx_queue_stats *stats); | |
f0706e82 | 1503 | u64 (*get_tsf)(struct ieee80211_hw *hw); |
3b5d665b | 1504 | void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); |
f0706e82 | 1505 | void (*reset_tsf)(struct ieee80211_hw *hw); |
f0706e82 | 1506 | int (*tx_last_beacon)(struct ieee80211_hw *hw); |
1b7d03ac RR |
1507 | int (*ampdu_action)(struct ieee80211_hw *hw, |
1508 | enum ieee80211_ampdu_mlme_action action, | |
17741cdc | 1509 | struct ieee80211_sta *sta, u16 tid, u16 *ssn); |
1f87f7d3 JB |
1510 | |
1511 | void (*rfkill_poll)(struct ieee80211_hw *hw); | |
aff89a9b JB |
1512 | #ifdef CONFIG_NL80211_TESTMODE |
1513 | int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); | |
1514 | #endif | |
f0706e82 JB |
1515 | }; |
1516 | ||
75a5f0cc JB |
1517 | /** |
1518 | * ieee80211_alloc_hw - Allocate a new hardware device | |
1519 | * | |
1520 | * This must be called once for each hardware device. The returned pointer | |
1521 | * must be used to refer to this device when calling other functions. | |
1522 | * mac80211 allocates a private data area for the driver pointed to by | |
1523 | * @priv in &struct ieee80211_hw, the size of this area is given as | |
1524 | * @priv_data_len. | |
1525 | * | |
1526 | * @priv_data_len: length of private data | |
1527 | * @ops: callbacks for this device | |
f0706e82 JB |
1528 | */ |
1529 | struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, | |
1530 | const struct ieee80211_ops *ops); | |
1531 | ||
75a5f0cc JB |
1532 | /** |
1533 | * ieee80211_register_hw - Register hardware device | |
1534 | * | |
dbbea671 JB |
1535 | * You must call this function before any other functions in |
1536 | * mac80211. Note that before a hardware can be registered, you | |
1537 | * need to fill the contained wiphy's information. | |
75a5f0cc JB |
1538 | * |
1539 | * @hw: the device to register as returned by ieee80211_alloc_hw() | |
1540 | */ | |
f0706e82 JB |
1541 | int ieee80211_register_hw(struct ieee80211_hw *hw); |
1542 | ||
f0706e82 JB |
1543 | #ifdef CONFIG_MAC80211_LEDS |
1544 | extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); | |
1545 | extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); | |
47f0c502 | 1546 | extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); |
cdcb006f | 1547 | extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); |
f0706e82 | 1548 | #endif |
75a5f0cc JB |
1549 | /** |
1550 | * ieee80211_get_tx_led_name - get name of TX LED | |
1551 | * | |
1552 | * mac80211 creates a transmit LED trigger for each wireless hardware | |
1553 | * that can be used to drive LEDs if your driver registers a LED device. | |
1554 | * This function returns the name (or %NULL if not configured for LEDs) | |
1555 | * of the trigger so you can automatically link the LED device. | |
1556 | * | |
1557 | * @hw: the hardware to get the LED trigger name for | |
1558 | */ | |
f0706e82 JB |
1559 | static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) |
1560 | { | |
1561 | #ifdef CONFIG_MAC80211_LEDS | |
1562 | return __ieee80211_get_tx_led_name(hw); | |
1563 | #else | |
1564 | return NULL; | |
1565 | #endif | |
1566 | } | |
1567 | ||
75a5f0cc JB |
1568 | /** |
1569 | * ieee80211_get_rx_led_name - get name of RX LED | |
1570 | * | |
1571 | * mac80211 creates a receive LED trigger for each wireless hardware | |
1572 | * that can be used to drive LEDs if your driver registers a LED device. | |
1573 | * This function returns the name (or %NULL if not configured for LEDs) | |
1574 | * of the trigger so you can automatically link the LED device. | |
1575 | * | |
1576 | * @hw: the hardware to get the LED trigger name for | |
1577 | */ | |
f0706e82 JB |
1578 | static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) |
1579 | { | |
1580 | #ifdef CONFIG_MAC80211_LEDS | |
1581 | return __ieee80211_get_rx_led_name(hw); | |
1582 | #else | |
1583 | return NULL; | |
1584 | #endif | |
1585 | } | |
1586 | ||
cdcb006f ID |
1587 | /** |
1588 | * ieee80211_get_assoc_led_name - get name of association LED | |
1589 | * | |
1590 | * mac80211 creates a association LED trigger for each wireless hardware | |
1591 | * that can be used to drive LEDs if your driver registers a LED device. | |
1592 | * This function returns the name (or %NULL if not configured for LEDs) | |
1593 | * of the trigger so you can automatically link the LED device. | |
1594 | * | |
1595 | * @hw: the hardware to get the LED trigger name for | |
1596 | */ | |
47f0c502 MB |
1597 | static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) |
1598 | { | |
1599 | #ifdef CONFIG_MAC80211_LEDS | |
1600 | return __ieee80211_get_assoc_led_name(hw); | |
1601 | #else | |
1602 | return NULL; | |
1603 | #endif | |
1604 | } | |
1605 | ||
cdcb006f ID |
1606 | /** |
1607 | * ieee80211_get_radio_led_name - get name of radio LED | |
1608 | * | |
1609 | * mac80211 creates a radio change LED trigger for each wireless hardware | |
1610 | * that can be used to drive LEDs if your driver registers a LED device. | |
1611 | * This function returns the name (or %NULL if not configured for LEDs) | |
1612 | * of the trigger so you can automatically link the LED device. | |
1613 | * | |
1614 | * @hw: the hardware to get the LED trigger name for | |
1615 | */ | |
1616 | static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) | |
1617 | { | |
1618 | #ifdef CONFIG_MAC80211_LEDS | |
1619 | return __ieee80211_get_radio_led_name(hw); | |
1620 | #else | |
1621 | return NULL; | |
1622 | #endif | |
1623 | } | |
47f0c502 | 1624 | |
75a5f0cc JB |
1625 | /** |
1626 | * ieee80211_unregister_hw - Unregister a hardware device | |
1627 | * | |
1628 | * This function instructs mac80211 to free allocated resources | |
1629 | * and unregister netdevices from the networking subsystem. | |
1630 | * | |
1631 | * @hw: the hardware to unregister | |
1632 | */ | |
f0706e82 JB |
1633 | void ieee80211_unregister_hw(struct ieee80211_hw *hw); |
1634 | ||
75a5f0cc JB |
1635 | /** |
1636 | * ieee80211_free_hw - free hardware descriptor | |
1637 | * | |
1638 | * This function frees everything that was allocated, including the | |
1639 | * private data for the driver. You must call ieee80211_unregister_hw() | |
6ef307bc | 1640 | * before calling this function. |
75a5f0cc JB |
1641 | * |
1642 | * @hw: the hardware to free | |
1643 | */ | |
f0706e82 JB |
1644 | void ieee80211_free_hw(struct ieee80211_hw *hw); |
1645 | ||
f2753ddb JB |
1646 | /** |
1647 | * ieee80211_restart_hw - restart hardware completely | |
1648 | * | |
1649 | * Call this function when the hardware was restarted for some reason | |
1650 | * (hardware error, ...) and the driver is unable to restore its state | |
1651 | * by itself. mac80211 assumes that at this point the driver/hardware | |
1652 | * is completely uninitialised and stopped, it starts the process by | |
1653 | * calling the ->start() operation. The driver will need to reset all | |
1654 | * internal state that it has prior to calling this function. | |
1655 | * | |
1656 | * @hw: the hardware to restart | |
1657 | */ | |
1658 | void ieee80211_restart_hw(struct ieee80211_hw *hw); | |
1659 | ||
f1d58c25 JB |
1660 | /* |
1661 | * trick to avoid symbol clashes with the ieee80211 subsystem, | |
1662 | * use the inline below instead | |
1663 | */ | |
1664 | void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); | |
75a5f0cc JB |
1665 | |
1666 | /** | |
1667 | * ieee80211_rx - receive frame | |
1668 | * | |
1669 | * Use this function to hand received frames to mac80211. The receive | |
1670 | * buffer in @skb must start with an IEEE 802.11 header or a radiotap | |
1671 | * header if %RX_FLAG_RADIOTAP is set in the @status flags. | |
1672 | * | |
2485f710 JB |
1673 | * This function may not be called in IRQ context. Calls to this function |
1674 | * for a single hardware must be synchronized against each other. Calls | |
1675 | * to this function and ieee80211_rx_irqsafe() may not be mixed for a | |
1676 | * single hardware. | |
75a5f0cc JB |
1677 | * |
1678 | * @hw: the hardware this frame came in on | |
1679 | * @skb: the buffer to receive, owned by mac80211 after this call | |
75a5f0cc | 1680 | */ |
f1d58c25 | 1681 | static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) |
75a5f0cc | 1682 | { |
f1d58c25 | 1683 | __ieee80211_rx(hw, skb); |
75a5f0cc JB |
1684 | } |
1685 | ||
1686 | /** | |
1687 | * ieee80211_rx_irqsafe - receive frame | |
1688 | * | |
1689 | * Like ieee80211_rx() but can be called in IRQ context | |
2485f710 JB |
1690 | * (internally defers to a tasklet.) |
1691 | * | |
1692 | * Calls to this function and ieee80211_rx() may not be mixed for a | |
1693 | * single hardware. | |
75a5f0cc JB |
1694 | * |
1695 | * @hw: the hardware this frame came in on | |
1696 | * @skb: the buffer to receive, owned by mac80211 after this call | |
75a5f0cc | 1697 | */ |
f1d58c25 | 1698 | void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); |
f0706e82 | 1699 | |
75a5f0cc JB |
1700 | /** |
1701 | * ieee80211_tx_status - transmit status callback | |
1702 | * | |
1703 | * Call this function for all transmitted frames after they have been | |
1704 | * transmitted. It is permissible to not call this function for | |
1705 | * multicast frames but this can affect statistics. | |
1706 | * | |
2485f710 JB |
1707 | * This function may not be called in IRQ context. Calls to this function |
1708 | * for a single hardware must be synchronized against each other. Calls | |
1709 | * to this function and ieee80211_tx_status_irqsafe() may not be mixed | |
1710 | * for a single hardware. | |
1711 | * | |
75a5f0cc JB |
1712 | * @hw: the hardware the frame was transmitted by |
1713 | * @skb: the frame that was transmitted, owned by mac80211 after this call | |
75a5f0cc | 1714 | */ |
f0706e82 | 1715 | void ieee80211_tx_status(struct ieee80211_hw *hw, |
e039fa4a | 1716 | struct sk_buff *skb); |
2485f710 JB |
1717 | |
1718 | /** | |
6ef307bc | 1719 | * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback |
2485f710 JB |
1720 | * |
1721 | * Like ieee80211_tx_status() but can be called in IRQ context | |
1722 | * (internally defers to a tasklet.) | |
1723 | * | |
1724 | * Calls to this function and ieee80211_tx_status() may not be mixed for a | |
1725 | * single hardware. | |
1726 | * | |
1727 | * @hw: the hardware the frame was transmitted by | |
1728 | * @skb: the frame that was transmitted, owned by mac80211 after this call | |
2485f710 | 1729 | */ |
f0706e82 | 1730 | void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, |
e039fa4a | 1731 | struct sk_buff *skb); |
f0706e82 JB |
1732 | |
1733 | /** | |
1734 | * ieee80211_beacon_get - beacon generation function | |
1735 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
32bfd35d | 1736 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
f0706e82 JB |
1737 | * |
1738 | * If the beacon frames are generated by the host system (i.e., not in | |
1739 | * hardware/firmware), the low-level driver uses this function to receive | |
1740 | * the next beacon frame from the 802.11 code. The low-level is responsible | |
1741 | * for calling this function before beacon data is needed (e.g., based on | |
1742 | * hardware interrupt). Returned skb is used only once and low-level driver | |
e37d4dff | 1743 | * is responsible for freeing it. |
f0706e82 JB |
1744 | */ |
1745 | struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, | |
e039fa4a | 1746 | struct ieee80211_vif *vif); |
f0706e82 JB |
1747 | |
1748 | /** | |
1749 | * ieee80211_rts_get - RTS frame generation function | |
1750 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
32bfd35d | 1751 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
f0706e82 JB |
1752 | * @frame: pointer to the frame that is going to be protected by the RTS. |
1753 | * @frame_len: the frame length (in octets). | |
e039fa4a | 1754 | * @frame_txctl: &struct ieee80211_tx_info of the frame. |
f0706e82 JB |
1755 | * @rts: The buffer where to store the RTS frame. |
1756 | * | |
1757 | * If the RTS frames are generated by the host system (i.e., not in | |
1758 | * hardware/firmware), the low-level driver uses this function to receive | |
1759 | * the next RTS frame from the 802.11 code. The low-level is responsible | |
1760 | * for calling this function before and RTS frame is needed. | |
1761 | */ | |
32bfd35d | 1762 | void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, |
f0706e82 | 1763 | const void *frame, size_t frame_len, |
e039fa4a | 1764 | const struct ieee80211_tx_info *frame_txctl, |
f0706e82 JB |
1765 | struct ieee80211_rts *rts); |
1766 | ||
1767 | /** | |
1768 | * ieee80211_rts_duration - Get the duration field for an RTS frame | |
1769 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
32bfd35d | 1770 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
f0706e82 | 1771 | * @frame_len: the length of the frame that is going to be protected by the RTS. |
e039fa4a | 1772 | * @frame_txctl: &struct ieee80211_tx_info of the frame. |
f0706e82 JB |
1773 | * |
1774 | * If the RTS is generated in firmware, but the host system must provide | |
1775 | * the duration field, the low-level driver uses this function to receive | |
1776 | * the duration field value in little-endian byteorder. | |
1777 | */ | |
32bfd35d JB |
1778 | __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, |
1779 | struct ieee80211_vif *vif, size_t frame_len, | |
e039fa4a | 1780 | const struct ieee80211_tx_info *frame_txctl); |
f0706e82 JB |
1781 | |
1782 | /** | |
1783 | * ieee80211_ctstoself_get - CTS-to-self frame generation function | |
1784 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
32bfd35d | 1785 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
f0706e82 JB |
1786 | * @frame: pointer to the frame that is going to be protected by the CTS-to-self. |
1787 | * @frame_len: the frame length (in octets). | |
e039fa4a | 1788 | * @frame_txctl: &struct ieee80211_tx_info of the frame. |
f0706e82 JB |
1789 | * @cts: The buffer where to store the CTS-to-self frame. |
1790 | * | |
1791 | * If the CTS-to-self frames are generated by the host system (i.e., not in | |
1792 | * hardware/firmware), the low-level driver uses this function to receive | |
1793 | * the next CTS-to-self frame from the 802.11 code. The low-level is responsible | |
1794 | * for calling this function before and CTS-to-self frame is needed. | |
1795 | */ | |
32bfd35d JB |
1796 | void ieee80211_ctstoself_get(struct ieee80211_hw *hw, |
1797 | struct ieee80211_vif *vif, | |
f0706e82 | 1798 | const void *frame, size_t frame_len, |
e039fa4a | 1799 | const struct ieee80211_tx_info *frame_txctl, |
f0706e82 JB |
1800 | struct ieee80211_cts *cts); |
1801 | ||
1802 | /** | |
1803 | * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame | |
1804 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
32bfd35d | 1805 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
f0706e82 | 1806 | * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. |
e039fa4a | 1807 | * @frame_txctl: &struct ieee80211_tx_info of the frame. |
f0706e82 JB |
1808 | * |
1809 | * If the CTS-to-self is generated in firmware, but the host system must provide | |
1810 | * the duration field, the low-level driver uses this function to receive | |
1811 | * the duration field value in little-endian byteorder. | |
1812 | */ | |
32bfd35d JB |
1813 | __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, |
1814 | struct ieee80211_vif *vif, | |
f0706e82 | 1815 | size_t frame_len, |
e039fa4a | 1816 | const struct ieee80211_tx_info *frame_txctl); |
f0706e82 JB |
1817 | |
1818 | /** | |
1819 | * ieee80211_generic_frame_duration - Calculate the duration field for a frame | |
1820 | * @hw: pointer obtained from ieee80211_alloc_hw(). | |
32bfd35d | 1821 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
f0706e82 | 1822 | * @frame_len: the length of the frame. |
8318d78a | 1823 | * @rate: the rate at which the frame is going to be transmitted. |
f0706e82 JB |
1824 | * |
1825 | * Calculate the duration field of some generic frame, given its | |
1826 | * length and transmission rate (in 100kbps). | |
1827 | */ | |
32bfd35d JB |
1828 | __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, |
1829 | struct ieee80211_vif *vif, | |
f0706e82 | 1830 | size_t frame_len, |
8318d78a | 1831 | struct ieee80211_rate *rate); |
f0706e82 JB |
1832 | |
1833 | /** | |
1834 | * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames | |
1835 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
32bfd35d | 1836 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. |
f0706e82 JB |
1837 | * |
1838 | * Function for accessing buffered broadcast and multicast frames. If | |
1839 | * hardware/firmware does not implement buffering of broadcast/multicast | |
1840 | * frames when power saving is used, 802.11 code buffers them in the host | |
1841 | * memory. The low-level driver uses this function to fetch next buffered | |
1842 | * frame. In most cases, this is used when generating beacon frame. This | |
1843 | * function returns a pointer to the next buffered skb or NULL if no more | |
1844 | * buffered frames are available. | |
1845 | * | |
1846 | * Note: buffered frames are returned only after DTIM beacon frame was | |
1847 | * generated with ieee80211_beacon_get() and the low-level driver must thus | |
1848 | * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns | |
1849 | * NULL if the previous generated beacon was not DTIM, so the low-level driver | |
1850 | * does not need to check for DTIM beacons separately and should be able to | |
1851 | * use common code for all beacons. | |
1852 | */ | |
1853 | struct sk_buff * | |
e039fa4a | 1854 | ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); |
f0706e82 | 1855 | |
5d2cdcd4 EG |
1856 | /** |
1857 | * ieee80211_get_tkip_key - get a TKIP rc4 for skb | |
1858 | * | |
1859 | * This function computes a TKIP rc4 key for an skb. It computes | |
1860 | * a phase 1 key if needed (iv16 wraps around). This function is to | |
1861 | * be used by drivers which can do HW encryption but need to compute | |
1862 | * to phase 1/2 key in SW. | |
1863 | * | |
1864 | * @keyconf: the parameter passed with the set key | |
1865 | * @skb: the skb for which the key is needed | |
6ef307bc | 1866 | * @type: TBD |
ea2d8b59 | 1867 | * @key: a buffer to which the key will be written |
5d2cdcd4 EG |
1868 | */ |
1869 | void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, | |
1870 | struct sk_buff *skb, | |
1871 | enum ieee80211_tkip_key_type type, u8 *key); | |
f0706e82 JB |
1872 | /** |
1873 | * ieee80211_wake_queue - wake specific queue | |
1874 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1875 | * @queue: queue number (counted from zero). | |
1876 | * | |
1877 | * Drivers should use this function instead of netif_wake_queue. | |
1878 | */ | |
1879 | void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); | |
1880 | ||
1881 | /** | |
1882 | * ieee80211_stop_queue - stop specific queue | |
1883 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1884 | * @queue: queue number (counted from zero). | |
1885 | * | |
1886 | * Drivers should use this function instead of netif_stop_queue. | |
1887 | */ | |
1888 | void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); | |
1889 | ||
92ab8535 TW |
1890 | /** |
1891 | * ieee80211_queue_stopped - test status of the queue | |
1892 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1893 | * @queue: queue number (counted from zero). | |
1894 | * | |
1895 | * Drivers should use this function instead of netif_stop_queue. | |
1896 | */ | |
1897 | ||
1898 | int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); | |
1899 | ||
f0706e82 JB |
1900 | /** |
1901 | * ieee80211_stop_queues - stop all queues | |
1902 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1903 | * | |
1904 | * Drivers should use this function instead of netif_stop_queue. | |
1905 | */ | |
1906 | void ieee80211_stop_queues(struct ieee80211_hw *hw); | |
1907 | ||
1908 | /** | |
1909 | * ieee80211_wake_queues - wake all queues | |
1910 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1911 | * | |
1912 | * Drivers should use this function instead of netif_wake_queue. | |
1913 | */ | |
1914 | void ieee80211_wake_queues(struct ieee80211_hw *hw); | |
1915 | ||
75a5f0cc JB |
1916 | /** |
1917 | * ieee80211_scan_completed - completed hardware scan | |
1918 | * | |
1919 | * When hardware scan offload is used (i.e. the hw_scan() callback is | |
1920 | * assigned) this function needs to be called by the driver to notify | |
1921 | * mac80211 that the scan finished. | |
1922 | * | |
1923 | * @hw: the hardware that finished the scan | |
2a519311 | 1924 | * @aborted: set to true if scan was aborted |
75a5f0cc | 1925 | */ |
2a519311 | 1926 | void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); |
f0706e82 | 1927 | |
dabeb344 | 1928 | /** |
6ef307bc | 1929 | * ieee80211_iterate_active_interfaces - iterate active interfaces |
dabeb344 JB |
1930 | * |
1931 | * This function iterates over the interfaces associated with a given | |
1932 | * hardware that are currently active and calls the callback for them. | |
2f561feb ID |
1933 | * This function allows the iterator function to sleep, when the iterator |
1934 | * function is atomic @ieee80211_iterate_active_interfaces_atomic can | |
1935 | * be used. | |
dabeb344 JB |
1936 | * |
1937 | * @hw: the hardware struct of which the interfaces should be iterated over | |
2f561feb | 1938 | * @iterator: the iterator function to call |
dabeb344 JB |
1939 | * @data: first argument of the iterator function |
1940 | */ | |
1941 | void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, | |
1942 | void (*iterator)(void *data, u8 *mac, | |
32bfd35d | 1943 | struct ieee80211_vif *vif), |
dabeb344 JB |
1944 | void *data); |
1945 | ||
2f561feb ID |
1946 | /** |
1947 | * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces | |
1948 | * | |
1949 | * This function iterates over the interfaces associated with a given | |
1950 | * hardware that are currently active and calls the callback for them. | |
1951 | * This function requires the iterator callback function to be atomic, | |
1952 | * if that is not desired, use @ieee80211_iterate_active_interfaces instead. | |
1953 | * | |
1954 | * @hw: the hardware struct of which the interfaces should be iterated over | |
1955 | * @iterator: the iterator function to call, cannot sleep | |
1956 | * @data: first argument of the iterator function | |
1957 | */ | |
1958 | void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, | |
1959 | void (*iterator)(void *data, | |
1960 | u8 *mac, | |
1961 | struct ieee80211_vif *vif), | |
1962 | void *data); | |
1963 | ||
42935eca LR |
1964 | /** |
1965 | * ieee80211_queue_work - add work onto the mac80211 workqueue | |
1966 | * | |
1967 | * Drivers and mac80211 use this to add work onto the mac80211 workqueue. | |
1968 | * This helper ensures drivers are not queueing work when they should not be. | |
1969 | * | |
1970 | * @hw: the hardware struct for the interface we are adding work for | |
1971 | * @work: the work we want to add onto the mac80211 workqueue | |
1972 | */ | |
1973 | void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); | |
1974 | ||
1975 | /** | |
1976 | * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue | |
1977 | * | |
1978 | * Drivers and mac80211 use this to queue delayed work onto the mac80211 | |
1979 | * workqueue. | |
1980 | * | |
1981 | * @hw: the hardware struct for the interface we are adding work for | |
1982 | * @dwork: delayable work to queue onto the mac80211 workqueue | |
1983 | * @delay: number of jiffies to wait before queueing | |
1984 | */ | |
1985 | void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, | |
1986 | struct delayed_work *dwork, | |
1987 | unsigned long delay); | |
1988 | ||
0df3ef45 RR |
1989 | /** |
1990 | * ieee80211_start_tx_ba_session - Start a tx Block Ack session. | |
1991 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
1992 | * @ra: receiver address of the BA session recipient | |
1993 | * @tid: the TID to BA on. | |
ea2d8b59 RD |
1994 | * |
1995 | * Return: success if addBA request was sent, failure otherwise | |
0df3ef45 RR |
1996 | * |
1997 | * Although mac80211/low level driver/user space application can estimate | |
1998 | * the need to start aggregation on a certain RA/TID, the session level | |
1999 | * will be managed by the mac80211. | |
2000 | */ | |
2001 | int ieee80211_start_tx_ba_session(struct ieee80211_hw *hw, u8 *ra, u16 tid); | |
2002 | ||
2003 | /** | |
2004 | * ieee80211_start_tx_ba_cb - low level driver ready to aggregate. | |
2005 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
2006 | * @ra: receiver address of the BA session recipient. | |
2007 | * @tid: the TID to BA on. | |
2008 | * | |
2009 | * This function must be called by low level driver once it has | |
2010 | * finished with preparations for the BA session. | |
2011 | */ | |
2012 | void ieee80211_start_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u16 tid); | |
2013 | ||
2014 | /** | |
2015 | * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. | |
2016 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
2017 | * @ra: receiver address of the BA session recipient. | |
2018 | * @tid: the TID to BA on. | |
2019 | * | |
2020 | * This function must be called by low level driver once it has | |
2021 | * finished with preparations for the BA session. | |
6ef307bc | 2022 | * This version of the function is IRQ-safe. |
0df3ef45 RR |
2023 | */ |
2024 | void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, | |
2025 | u16 tid); | |
2026 | ||
2027 | /** | |
2028 | * ieee80211_stop_tx_ba_session - Stop a Block Ack session. | |
2029 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
2030 | * @ra: receiver address of the BA session recipient | |
2031 | * @tid: the TID to stop BA. | |
2032 | * @initiator: if indicates initiator DELBA frame will be sent. | |
ea2d8b59 RD |
2033 | * |
2034 | * Return: error if no sta with matching da found, success otherwise | |
0df3ef45 RR |
2035 | * |
2036 | * Although mac80211/low level driver/user space application can estimate | |
2037 | * the need to stop aggregation on a certain RA/TID, the session level | |
2038 | * will be managed by the mac80211. | |
2039 | */ | |
2040 | int ieee80211_stop_tx_ba_session(struct ieee80211_hw *hw, | |
2041 | u8 *ra, u16 tid, | |
2042 | enum ieee80211_back_parties initiator); | |
2043 | ||
2044 | /** | |
2045 | * ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate. | |
2046 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
2047 | * @ra: receiver address of the BA session recipient. | |
2048 | * @tid: the desired TID to BA on. | |
2049 | * | |
2050 | * This function must be called by low level driver once it has | |
2051 | * finished with preparations for the BA session tear down. | |
2052 | */ | |
2053 | void ieee80211_stop_tx_ba_cb(struct ieee80211_hw *hw, u8 *ra, u8 tid); | |
2054 | ||
2055 | /** | |
2056 | * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. | |
2057 | * @hw: pointer as obtained from ieee80211_alloc_hw(). | |
2058 | * @ra: receiver address of the BA session recipient. | |
2059 | * @tid: the desired TID to BA on. | |
2060 | * | |
2061 | * This function must be called by low level driver once it has | |
2062 | * finished with preparations for the BA session tear down. | |
6ef307bc | 2063 | * This version of the function is IRQ-safe. |
0df3ef45 RR |
2064 | */ |
2065 | void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_hw *hw, const u8 *ra, | |
2066 | u16 tid); | |
2067 | ||
17741cdc JB |
2068 | /** |
2069 | * ieee80211_find_sta - find a station | |
2070 | * | |
2071 | * @hw: pointer as obtained from ieee80211_alloc_hw() | |
2072 | * @addr: station's address | |
2073 | * | |
2074 | * This function must be called under RCU lock and the | |
2075 | * resulting pointer is only valid under RCU lock as well. | |
2076 | */ | |
2077 | struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw, | |
2078 | const u8 *addr); | |
2079 | ||
04de8381 KV |
2080 | /** |
2081 | * ieee80211_beacon_loss - inform hardware does not receive beacons | |
2082 | * | |
2083 | * @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf. | |
2084 | * | |
2085 | * When beacon filtering is enabled with IEEE80211_HW_BEACON_FILTERING and | |
2086 | * IEEE80211_CONF_PS is set, the driver needs to inform whenever the | |
2087 | * hardware is not receiving beacons with this function. | |
2088 | */ | |
2089 | void ieee80211_beacon_loss(struct ieee80211_vif *vif); | |
4b7679a5 JB |
2090 | |
2091 | /* Rate control API */ | |
e6a9854b | 2092 | |
81cb7623 S |
2093 | /** |
2094 | * enum rate_control_changed - flags to indicate which parameter changed | |
2095 | * | |
2096 | * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have | |
2097 | * changed, rate control algorithm can update its internal state if needed. | |
2098 | */ | |
2099 | enum rate_control_changed { | |
2100 | IEEE80211_RC_HT_CHANGED = BIT(0) | |
2101 | }; | |
2102 | ||
4b7679a5 | 2103 | /** |
e6a9854b JB |
2104 | * struct ieee80211_tx_rate_control - rate control information for/from RC algo |
2105 | * | |
2106 | * @hw: The hardware the algorithm is invoked for. | |
2107 | * @sband: The band this frame is being transmitted on. | |
2108 | * @bss_conf: the current BSS configuration | |
2109 | * @reported_rate: The rate control algorithm can fill this in to indicate | |
2110 | * which rate should be reported to userspace as the current rate and | |
2111 | * used for rate calculations in the mesh network. | |
2112 | * @rts: whether RTS will be used for this frame because it is longer than the | |
2113 | * RTS threshold | |
2114 | * @short_preamble: whether mac80211 will request short-preamble transmission | |
2115 | * if the selected rate supports it | |
2116 | * @max_rate_idx: user-requested maximum rate (not MCS for now) | |
e25cf4a6 JB |
2117 | * @skb: the skb that will be transmitted, the control information in it needs |
2118 | * to be filled in | |
e6a9854b JB |
2119 | */ |
2120 | struct ieee80211_tx_rate_control { | |
2121 | struct ieee80211_hw *hw; | |
2122 | struct ieee80211_supported_band *sband; | |
2123 | struct ieee80211_bss_conf *bss_conf; | |
2124 | struct sk_buff *skb; | |
2125 | struct ieee80211_tx_rate reported_rate; | |
2126 | bool rts, short_preamble; | |
2127 | u8 max_rate_idx; | |
4b7679a5 JB |
2128 | }; |
2129 | ||
2130 | struct rate_control_ops { | |
2131 | struct module *module; | |
2132 | const char *name; | |
2133 | void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); | |
4b7679a5 JB |
2134 | void (*free)(void *priv); |
2135 | ||
2136 | void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); | |
2137 | void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, | |
2138 | struct ieee80211_sta *sta, void *priv_sta); | |
81cb7623 S |
2139 | void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, |
2140 | struct ieee80211_sta *sta, | |
2141 | void *priv_sta, u32 changed); | |
4b7679a5 JB |
2142 | void (*free_sta)(void *priv, struct ieee80211_sta *sta, |
2143 | void *priv_sta); | |
2144 | ||
2145 | void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, | |
2146 | struct ieee80211_sta *sta, void *priv_sta, | |
2147 | struct sk_buff *skb); | |
e6a9854b JB |
2148 | void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, |
2149 | struct ieee80211_tx_rate_control *txrc); | |
4b7679a5 JB |
2150 | |
2151 | void (*add_sta_debugfs)(void *priv, void *priv_sta, | |
2152 | struct dentry *dir); | |
2153 | void (*remove_sta_debugfs)(void *priv, void *priv_sta); | |
2154 | }; | |
2155 | ||
2156 | static inline int rate_supported(struct ieee80211_sta *sta, | |
2157 | enum ieee80211_band band, | |
2158 | int index) | |
2159 | { | |
2160 | return (sta == NULL || sta->supp_rates[band] & BIT(index)); | |
2161 | } | |
2162 | ||
4c6d4f5c LR |
2163 | /** |
2164 | * rate_control_send_low - helper for drivers for management/no-ack frames | |
2165 | * | |
2166 | * Rate control algorithms that agree to use the lowest rate to | |
2167 | * send management frames and NO_ACK data with the respective hw | |
2168 | * retries should use this in the beginning of their mac80211 get_rate | |
2169 | * callback. If true is returned the rate control can simply return. | |
2170 | * If false is returned we guarantee that sta and sta and priv_sta is | |
2171 | * not null. | |
2172 | * | |
2173 | * Rate control algorithms wishing to do more intelligent selection of | |
2174 | * rate for multicast/broadcast frames may choose to not use this. | |
2175 | * | |
2176 | * @sta: &struct ieee80211_sta pointer to the target destination. Note | |
2177 | * that this may be null. | |
2178 | * @priv_sta: private rate control structure. This may be null. | |
2179 | * @txrc: rate control information we sholud populate for mac80211. | |
2180 | */ | |
2181 | bool rate_control_send_low(struct ieee80211_sta *sta, | |
2182 | void *priv_sta, | |
2183 | struct ieee80211_tx_rate_control *txrc); | |
2184 | ||
2185 | ||
4b7679a5 JB |
2186 | static inline s8 |
2187 | rate_lowest_index(struct ieee80211_supported_band *sband, | |
2188 | struct ieee80211_sta *sta) | |
2189 | { | |
2190 | int i; | |
2191 | ||
2192 | for (i = 0; i < sband->n_bitrates; i++) | |
2193 | if (rate_supported(sta, sband->band, i)) | |
2194 | return i; | |
2195 | ||
2196 | /* warn when we cannot find a rate. */ | |
2197 | WARN_ON(1); | |
2198 | ||
2199 | return 0; | |
2200 | } | |
2201 | ||
b770b43e LR |
2202 | static inline |
2203 | bool rate_usable_index_exists(struct ieee80211_supported_band *sband, | |
2204 | struct ieee80211_sta *sta) | |
2205 | { | |
2206 | unsigned int i; | |
2207 | ||
2208 | for (i = 0; i < sband->n_bitrates; i++) | |
2209 | if (rate_supported(sta, sband->band, i)) | |
2210 | return true; | |
2211 | return false; | |
2212 | } | |
4b7679a5 JB |
2213 | |
2214 | int ieee80211_rate_control_register(struct rate_control_ops *ops); | |
2215 | void ieee80211_rate_control_unregister(struct rate_control_ops *ops); | |
2216 | ||
10c806b3 LR |
2217 | static inline bool |
2218 | conf_is_ht20(struct ieee80211_conf *conf) | |
2219 | { | |
4797938c | 2220 | return conf->channel_type == NL80211_CHAN_HT20; |
10c806b3 LR |
2221 | } |
2222 | ||
2223 | static inline bool | |
2224 | conf_is_ht40_minus(struct ieee80211_conf *conf) | |
2225 | { | |
4797938c | 2226 | return conf->channel_type == NL80211_CHAN_HT40MINUS; |
10c806b3 LR |
2227 | } |
2228 | ||
2229 | static inline bool | |
2230 | conf_is_ht40_plus(struct ieee80211_conf *conf) | |
2231 | { | |
4797938c | 2232 | return conf->channel_type == NL80211_CHAN_HT40PLUS; |
10c806b3 LR |
2233 | } |
2234 | ||
2235 | static inline bool | |
2236 | conf_is_ht40(struct ieee80211_conf *conf) | |
2237 | { | |
2238 | return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); | |
2239 | } | |
2240 | ||
2241 | static inline bool | |
2242 | conf_is_ht(struct ieee80211_conf *conf) | |
2243 | { | |
4797938c | 2244 | return conf->channel_type != NL80211_CHAN_NO_HT; |
10c806b3 LR |
2245 | } |
2246 | ||
f0706e82 | 2247 | #endif /* MAC80211_H */ |