1 /* 2 * mac80211 <-> driver interface 3 * 4 * Copyright 2002-2005, Devicescape Software, Inc. 5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 6 * Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net> 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> 22 #include <net/cfg80211.h> 23 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 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 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 44 * use the non-IRQ-safe functions! 45 */ 46 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. 73 */ 74 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 90 /** 91 * enum ieee80211_max_queues - maximum number of queues 92 * 93 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 94 */ 95 enum ieee80211_max_queues { 96 IEEE80211_MAX_QUEUES = 4, 97 }; 98 99 /** 100 * struct ieee80211_tx_queue_params - transmit queue configuration 101 * 102 * The information provided in this structure is required for QoS 103 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 104 * 105 * @aifs: arbitration interframe space [0..255] 106 * @cw_min: minimum contention window [a value of the form 107 * 2^n-1 in the range 1..32767] 108 * @cw_max: maximum contention window [like @cw_min] 109 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 110 * @uapsd: is U-APSD mode enabled for the queue 111 */ 112 struct ieee80211_tx_queue_params { 113 u16 txop; 114 u16 cw_min; 115 u16 cw_max; 116 u8 aifs; 117 bool uapsd; 118 }; 119 120 struct ieee80211_low_level_stats { 121 unsigned int dot11ACKFailureCount; 122 unsigned int dot11RTSFailureCount; 123 unsigned int dot11FCSErrorCount; 124 unsigned int dot11RTSSuccessCount; 125 }; 126 127 /** 128 * enum ieee80211_bss_change - BSS change notification flags 129 * 130 * These flags are used with the bss_info_changed() callback 131 * to indicate which BSS parameter changed. 132 * 133 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 134 * also implies a change in the AID. 135 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 136 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 137 * @BSS_CHANGED_ERP_SLOT: slot timing changed 138 * @BSS_CHANGED_HT: 802.11n parameters changed 139 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 140 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 141 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 142 * reason (IBSS and managed mode) 143 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 144 * new beacon (beaconing modes) 145 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 146 * enabled/disabled (beaconing modes) 147 * @BSS_CHANGED_CQM: Connection quality monitor config changed 148 * @BSS_CHANGED_IBSS: IBSS join status changed 149 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 150 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 151 * that it is only ever disabled for station mode. 152 */ 153 enum ieee80211_bss_change { 154 BSS_CHANGED_ASSOC = 1<<0, 155 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 156 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 157 BSS_CHANGED_ERP_SLOT = 1<<3, 158 BSS_CHANGED_HT = 1<<4, 159 BSS_CHANGED_BASIC_RATES = 1<<5, 160 BSS_CHANGED_BEACON_INT = 1<<6, 161 BSS_CHANGED_BSSID = 1<<7, 162 BSS_CHANGED_BEACON = 1<<8, 163 BSS_CHANGED_BEACON_ENABLED = 1<<9, 164 BSS_CHANGED_CQM = 1<<10, 165 BSS_CHANGED_IBSS = 1<<11, 166 BSS_CHANGED_ARP_FILTER = 1<<12, 167 BSS_CHANGED_QOS = 1<<13, 168 169 /* when adding here, make sure to change ieee80211_reconfig */ 170 }; 171 172 /* 173 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 174 * of addresses for an interface increase beyond this value, hardware ARP 175 * filtering will be disabled. 176 */ 177 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 178 179 /** 180 * struct ieee80211_bss_conf - holds the BSS's changing parameters 181 * 182 * This structure keeps information about a BSS (and an association 183 * to that BSS) that can change during the lifetime of the BSS. 184 * 185 * @assoc: association status 186 * @ibss_joined: indicates whether this station is part of an IBSS 187 * or not 188 * @aid: association ID number, valid only when @assoc is true 189 * @use_cts_prot: use CTS protection 190 * @use_short_preamble: use 802.11b short preamble; 191 * if the hardware cannot handle this it must set the 192 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 193 * @use_short_slot: use short slot time (only relevant for ERP); 194 * if the hardware cannot handle this it must set the 195 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 196 * @dtim_period: num of beacons before the next DTIM, for beaconing, 197 * valid in station mode only while @assoc is true and if also 198 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 199 * @ps_dtim_period) 200 * @timestamp: beacon timestamp 201 * @beacon_int: beacon interval 202 * @assoc_capability: capabilities taken from assoc resp 203 * @basic_rates: bitmap of basic rates, each bit stands for an 204 * index into the rate table configured by the driver in 205 * the current band. 206 * @bssid: The BSSID for this BSS 207 * @enable_beacon: whether beaconing should be enabled or not 208 * @channel_type: Channel type for this BSS -- the hardware might be 209 * configured for HT40+ while this BSS only uses no-HT, for 210 * example. 211 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). 212 * This field is only valid when the channel type is one of the HT types. 213 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 214 * implies disabled 215 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 216 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 217 * may filter ARP queries targeted for other addresses than listed here. 218 * The driver must allow ARP queries targeted for all address listed here 219 * to pass through. An empty list implies no ARP queries need to pass. 220 * @arp_addr_cnt: Number of addresses currently on the list. 221 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 222 * filter ARP queries based on the @arp_addr_list, if disabled, the 223 * hardware must not perform any ARP filtering. Note, that the filter will 224 * be enabled also in promiscuous mode. 225 * @qos: This is a QoS-enabled BSS. 226 */ 227 struct ieee80211_bss_conf { 228 const u8 *bssid; 229 /* association related data */ 230 bool assoc, ibss_joined; 231 u16 aid; 232 /* erp related data */ 233 bool use_cts_prot; 234 bool use_short_preamble; 235 bool use_short_slot; 236 bool enable_beacon; 237 u8 dtim_period; 238 u16 beacon_int; 239 u16 assoc_capability; 240 u64 timestamp; 241 u32 basic_rates; 242 u16 ht_operation_mode; 243 s32 cqm_rssi_thold; 244 u32 cqm_rssi_hyst; 245 enum nl80211_channel_type channel_type; 246 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 247 u8 arp_addr_cnt; 248 bool arp_filter_enabled; 249 bool qos; 250 }; 251 252 /** 253 * enum mac80211_tx_control_flags - flags to describe transmission information/status 254 * 255 * These flags are used with the @flags member of &ieee80211_tx_info. 256 * 257 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 258 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 259 * number to this frame, taking care of not overwriting the fragment 260 * number and increasing the sequence number only when the 261 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 262 * assign sequence numbers to QoS-data frames but cannot do so correctly 263 * for non-QoS-data and management frames because beacons need them from 264 * that counter as well and mac80211 cannot guarantee proper sequencing. 265 * If this flag is set, the driver should instruct the hardware to 266 * assign a sequence number to the frame or assign one itself. Cf. IEEE 267 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 268 * beacons and always be clear for frames without a sequence number field. 269 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 270 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 271 * station 272 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 273 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 274 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 275 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 276 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 277 * because the destination STA was in powersave mode. Note that to 278 * avoid race conditions, the filter must be set by the hardware or 279 * firmware upon receiving a frame that indicates that the station 280 * went to sleep (must be done on device to filter frames already on 281 * the queue) and may only be unset after mac80211 gives the OK for 282 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 283 * since only then is it guaranteed that no more frames are in the 284 * hardware queue. 285 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 286 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 287 * is for the whole aggregation. 288 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 289 * so consider using block ack request (BAR). 290 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 291 * set by rate control algorithms to indicate probe rate, will 292 * be cleared for fragmented frames (except on the last fragment) 293 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 294 * used to indicate that a pending frame requires TX processing before 295 * it can be sent out. 296 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 297 * used to indicate that a frame was already retried due to PS 298 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 299 * used to indicate frame should not be encrypted 300 * @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?) 301 * This frame is a response to a PS-poll frame and should be sent 302 * although the station is in powersave mode. 303 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 304 * transmit function after the current frame, this can be used 305 * by drivers to kick the DMA queue only if unset or when the 306 * queue gets full. 307 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 308 * after TX status because the destination was asleep, it must not 309 * be modified again (no seqno assignment, crypto, etc.) 310 * @IEEE80211_TX_INTFL_HAS_RADIOTAP: This frame was injected and still 311 * has a radiotap header at skb->data. 312 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 313 * MLME command (internal to mac80211 to figure out whether to send TX 314 * status to user space) 315 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 316 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 317 * frame and selects the maximum number of streams that it can use. 318 */ 319 enum mac80211_tx_control_flags { 320 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 321 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 322 IEEE80211_TX_CTL_NO_ACK = BIT(2), 323 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 324 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 325 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 326 IEEE80211_TX_CTL_AMPDU = BIT(6), 327 IEEE80211_TX_CTL_INJECTED = BIT(7), 328 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 329 IEEE80211_TX_STAT_ACK = BIT(9), 330 IEEE80211_TX_STAT_AMPDU = BIT(10), 331 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 332 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 333 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 334 IEEE80211_TX_INTFL_RETRIED = BIT(15), 335 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 336 IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17), 337 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 338 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 339 IEEE80211_TX_INTFL_HAS_RADIOTAP = BIT(20), 340 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 341 IEEE80211_TX_CTL_LDPC = BIT(22), 342 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 343 }; 344 345 #define IEEE80211_TX_CTL_STBC_SHIFT 23 346 347 /** 348 * enum mac80211_rate_control_flags - per-rate flags set by the 349 * Rate Control algorithm. 350 * 351 * These flags are set by the Rate control algorithm for each rate during tx, 352 * in the @flags member of struct ieee80211_tx_rate. 353 * 354 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 355 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 356 * This is set if the current BSS requires ERP protection. 357 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 358 * @IEEE80211_TX_RC_MCS: HT rate. 359 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 360 * Greenfield mode. 361 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 362 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 363 * adjacent 20 MHz channels, if the current channel type is 364 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 365 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 366 */ 367 enum mac80211_rate_control_flags { 368 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 369 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 370 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 371 372 /* rate index is an MCS rate number instead of an index */ 373 IEEE80211_TX_RC_MCS = BIT(3), 374 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 375 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 376 IEEE80211_TX_RC_DUP_DATA = BIT(6), 377 IEEE80211_TX_RC_SHORT_GI = BIT(7), 378 }; 379 380 381 /* there are 40 bytes if you don't need the rateset to be kept */ 382 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 383 384 /* if you do need the rateset, then you have less space */ 385 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 386 387 /* maximum number of rate stages */ 388 #define IEEE80211_TX_MAX_RATES 5 389 390 /** 391 * struct ieee80211_tx_rate - rate selection/status 392 * 393 * @idx: rate index to attempt to send with 394 * @flags: rate control flags (&enum mac80211_rate_control_flags) 395 * @count: number of tries in this rate before going to the next rate 396 * 397 * A value of -1 for @idx indicates an invalid rate and, if used 398 * in an array of retry rates, that no more rates should be tried. 399 * 400 * When used for transmit status reporting, the driver should 401 * always report the rate along with the flags it used. 402 * 403 * &struct ieee80211_tx_info contains an array of these structs 404 * in the control information, and it will be filled by the rate 405 * control algorithm according to what should be sent. For example, 406 * if this array contains, in the format { <idx>, <count> } the 407 * information 408 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 409 * then this means that the frame should be transmitted 410 * up to twice at rate 3, up to twice at rate 2, and up to four 411 * times at rate 1 if it doesn't get acknowledged. Say it gets 412 * acknowledged by the peer after the fifth attempt, the status 413 * information should then contain 414 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 415 * since it was transmitted twice at rate 3, twice at rate 2 416 * and once at rate 1 after which we received an acknowledgement. 417 */ 418 struct ieee80211_tx_rate { 419 s8 idx; 420 u8 count; 421 u8 flags; 422 } __packed; 423 424 /** 425 * struct ieee80211_tx_info - skb transmit information 426 * 427 * This structure is placed in skb->cb for three uses: 428 * (1) mac80211 TX control - mac80211 tells the driver what to do 429 * (2) driver internal use (if applicable) 430 * (3) TX status information - driver tells mac80211 what happened 431 * 432 * The TX control's sta pointer is only valid during the ->tx call, 433 * it may be NULL. 434 * 435 * @flags: transmit info flags, defined above 436 * @band: the band to transmit on (use for checking for races) 437 * @antenna_sel_tx: antenna to use, 0 for automatic diversity 438 * @pad: padding, ignore 439 * @control: union for control data 440 * @status: union for status data 441 * @driver_data: array of driver_data pointers 442 * @ampdu_ack_len: number of acked aggregated frames. 443 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 444 * @ampdu_len: number of aggregated frames. 445 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 446 * @ack_signal: signal strength of the ACK frame 447 */ 448 struct ieee80211_tx_info { 449 /* common information */ 450 u32 flags; 451 u8 band; 452 453 u8 antenna_sel_tx; 454 455 /* 2 byte hole */ 456 u8 pad[2]; 457 458 union { 459 struct { 460 union { 461 /* rate control */ 462 struct { 463 struct ieee80211_tx_rate rates[ 464 IEEE80211_TX_MAX_RATES]; 465 s8 rts_cts_rate_idx; 466 }; 467 /* only needed before rate control */ 468 unsigned long jiffies; 469 }; 470 /* NB: vif can be NULL for injected frames */ 471 struct ieee80211_vif *vif; 472 struct ieee80211_key_conf *hw_key; 473 struct ieee80211_sta *sta; 474 } control; 475 struct { 476 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 477 u8 ampdu_ack_len; 478 int ack_signal; 479 u8 ampdu_len; 480 /* 15 bytes free */ 481 } status; 482 struct { 483 struct ieee80211_tx_rate driver_rates[ 484 IEEE80211_TX_MAX_RATES]; 485 void *rate_driver_data[ 486 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 487 }; 488 void *driver_data[ 489 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 490 }; 491 }; 492 493 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 494 { 495 return (struct ieee80211_tx_info *)skb->cb; 496 } 497 498 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 499 { 500 return (struct ieee80211_rx_status *)skb->cb; 501 } 502 503 /** 504 * ieee80211_tx_info_clear_status - clear TX status 505 * 506 * @info: The &struct ieee80211_tx_info to be cleared. 507 * 508 * When the driver passes an skb back to mac80211, it must report 509 * a number of things in TX status. This function clears everything 510 * in the TX status but the rate control information (it does clear 511 * the count since you need to fill that in anyway). 512 * 513 * NOTE: You can only use this function if you do NOT use 514 * info->driver_data! Use info->rate_driver_data 515 * instead if you need only the less space that allows. 516 */ 517 static inline void 518 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 519 { 520 int i; 521 522 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 523 offsetof(struct ieee80211_tx_info, control.rates)); 524 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 525 offsetof(struct ieee80211_tx_info, driver_rates)); 526 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 527 /* clear the rate counts */ 528 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 529 info->status.rates[i].count = 0; 530 531 BUILD_BUG_ON( 532 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 533 memset(&info->status.ampdu_ack_len, 0, 534 sizeof(struct ieee80211_tx_info) - 535 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 536 } 537 538 539 /** 540 * enum mac80211_rx_flags - receive flags 541 * 542 * These flags are used with the @flag member of &struct ieee80211_rx_status. 543 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 544 * Use together with %RX_FLAG_MMIC_STRIPPED. 545 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 546 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 547 * verification has been done by the hardware. 548 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 549 * If this flag is set, the stack cannot do any replay detection 550 * hence the driver or hardware will have to do that. 551 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 552 * the frame. 553 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 554 * the frame. 555 * @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field) 556 * is valid. This is useful in monitor mode and necessary for beacon frames 557 * to enable IBSS merging. 558 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 559 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 560 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 561 * @RX_FLAG_SHORT_GI: Short guard interval was used 562 * @RX_FLAG_INTERNAL_CMTR: set internally after frame was reported 563 * on cooked monitor to avoid double-reporting it for multiple 564 * virtual interfaces 565 */ 566 enum mac80211_rx_flags { 567 RX_FLAG_MMIC_ERROR = 1<<0, 568 RX_FLAG_DECRYPTED = 1<<1, 569 RX_FLAG_MMIC_STRIPPED = 1<<3, 570 RX_FLAG_IV_STRIPPED = 1<<4, 571 RX_FLAG_FAILED_FCS_CRC = 1<<5, 572 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 573 RX_FLAG_TSFT = 1<<7, 574 RX_FLAG_SHORTPRE = 1<<8, 575 RX_FLAG_HT = 1<<9, 576 RX_FLAG_40MHZ = 1<<10, 577 RX_FLAG_SHORT_GI = 1<<11, 578 RX_FLAG_INTERNAL_CMTR = 1<<12, 579 }; 580 581 /** 582 * struct ieee80211_rx_status - receive status 583 * 584 * The low-level driver should provide this information (the subset 585 * supported by hardware) to the 802.11 code with each received 586 * frame, in the skb's control buffer (cb). 587 * 588 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 589 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 590 * @band: the active band when this frame was received 591 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 592 * @signal: signal strength when receiving this frame, either in dBm, in dB or 593 * unspecified depending on the hardware capabilities flags 594 * @IEEE80211_HW_SIGNAL_* 595 * @antenna: antenna used 596 * @rate_idx: index of data rate into band's supported rates or MCS index if 597 * HT rates are use (RX_FLAG_HT) 598 * @flag: %RX_FLAG_* 599 */ 600 struct ieee80211_rx_status { 601 u64 mactime; 602 enum ieee80211_band band; 603 int freq; 604 int signal; 605 int antenna; 606 int rate_idx; 607 int flag; 608 }; 609 610 /** 611 * enum ieee80211_conf_flags - configuration flags 612 * 613 * Flags to define PHY configuration options 614 * 615 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 616 * to determine for example whether to calculate timestamps for packets 617 * or not, do not use instead of filter flags! 618 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 619 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 620 * meaning that the hardware still wakes up for beacons, is able to 621 * transmit frames and receive the possible acknowledgment frames. 622 * Not to be confused with hardware specific wakeup/sleep states, 623 * driver is responsible for that. See the section "Powersave support" 624 * for more. 625 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 626 * the driver should be prepared to handle configuration requests but 627 * may turn the device off as much as possible. Typically, this flag will 628 * be set when an interface is set UP but not associated or scanning, but 629 * it can also be unset in that case when monitor interfaces are active. 630 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 631 * operating channel. 632 */ 633 enum ieee80211_conf_flags { 634 IEEE80211_CONF_MONITOR = (1<<0), 635 IEEE80211_CONF_PS = (1<<1), 636 IEEE80211_CONF_IDLE = (1<<2), 637 IEEE80211_CONF_OFFCHANNEL = (1<<3), 638 }; 639 640 641 /** 642 * enum ieee80211_conf_changed - denotes which configuration changed 643 * 644 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 645 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 646 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 647 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 648 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 649 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 650 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 651 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 652 */ 653 enum ieee80211_conf_changed { 654 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 655 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 656 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 657 IEEE80211_CONF_CHANGE_PS = BIT(4), 658 IEEE80211_CONF_CHANGE_POWER = BIT(5), 659 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 660 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 661 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 662 }; 663 664 /** 665 * enum ieee80211_smps_mode - spatial multiplexing power save mode 666 * 667 * @IEEE80211_SMPS_AUTOMATIC: automatic 668 * @IEEE80211_SMPS_OFF: off 669 * @IEEE80211_SMPS_STATIC: static 670 * @IEEE80211_SMPS_DYNAMIC: dynamic 671 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 672 */ 673 enum ieee80211_smps_mode { 674 IEEE80211_SMPS_AUTOMATIC, 675 IEEE80211_SMPS_OFF, 676 IEEE80211_SMPS_STATIC, 677 IEEE80211_SMPS_DYNAMIC, 678 679 /* keep last */ 680 IEEE80211_SMPS_NUM_MODES, 681 }; 682 683 /** 684 * struct ieee80211_conf - configuration of the device 685 * 686 * This struct indicates how the driver shall configure the hardware. 687 * 688 * @flags: configuration flags defined above 689 * 690 * @listen_interval: listen interval in units of beacon interval 691 * @max_sleep_period: the maximum number of beacon intervals to sleep for 692 * before checking the beacon for a TIM bit (managed mode only); this 693 * value will be only achievable between DTIM frames, the hardware 694 * needs to check for the multicast traffic bit in DTIM beacons. 695 * This variable is valid only when the CONF_PS flag is set. 696 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 697 * in power saving. Power saving will not be enabled until a beacon 698 * has been received and the DTIM period is known. 699 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 700 * powersave documentation below. This variable is valid only when 701 * the CONF_PS flag is set. 702 * 703 * @power_level: requested transmit power (in dBm) 704 * 705 * @channel: the channel to tune to 706 * @channel_type: the channel (HT) type 707 * 708 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 709 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 710 * but actually means the number of transmissions not the number of retries 711 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 712 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 713 * number of transmissions not the number of retries 714 * 715 * @smps_mode: spatial multiplexing powersave mode; note that 716 * %IEEE80211_SMPS_STATIC is used when the device is not 717 * configured for an HT channel 718 */ 719 struct ieee80211_conf { 720 u32 flags; 721 int power_level, dynamic_ps_timeout; 722 int max_sleep_period; 723 724 u16 listen_interval; 725 u8 ps_dtim_period; 726 727 u8 long_frame_max_tx_count, short_frame_max_tx_count; 728 729 struct ieee80211_channel *channel; 730 enum nl80211_channel_type channel_type; 731 enum ieee80211_smps_mode smps_mode; 732 }; 733 734 /** 735 * struct ieee80211_channel_switch - holds the channel switch data 736 * 737 * The information provided in this structure is required for channel switch 738 * operation. 739 * 740 * @timestamp: value in microseconds of the 64-bit Time Synchronization 741 * Function (TSF) timer when the frame containing the channel switch 742 * announcement was received. This is simply the rx.mactime parameter 743 * the driver passed into mac80211. 744 * @block_tx: Indicates whether transmission must be blocked before the 745 * scheduled channel switch, as indicated by the AP. 746 * @channel: the new channel to switch to 747 * @count: the number of TBTT's until the channel switch event 748 */ 749 struct ieee80211_channel_switch { 750 u64 timestamp; 751 bool block_tx; 752 struct ieee80211_channel *channel; 753 u8 count; 754 }; 755 756 /** 757 * struct ieee80211_vif - per-interface data 758 * 759 * Data in this structure is continually present for driver 760 * use during the life of a virtual interface. 761 * 762 * @type: type of this virtual interface 763 * @bss_conf: BSS configuration for this interface, either our own 764 * or the BSS we're associated to 765 * @addr: address of this interface 766 * @drv_priv: data area for driver use, will always be aligned to 767 * sizeof(void *). 768 */ 769 struct ieee80211_vif { 770 enum nl80211_iftype type; 771 struct ieee80211_bss_conf bss_conf; 772 u8 addr[ETH_ALEN]; 773 /* must be last */ 774 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 775 }; 776 777 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 778 { 779 #ifdef CONFIG_MAC80211_MESH 780 return vif->type == NL80211_IFTYPE_MESH_POINT; 781 #endif 782 return false; 783 } 784 785 /** 786 * enum ieee80211_key_alg - key algorithm 787 * @ALG_WEP: WEP40 or WEP104 788 * @ALG_TKIP: TKIP 789 * @ALG_CCMP: CCMP (AES) 790 * @ALG_AES_CMAC: AES-128-CMAC 791 */ 792 enum ieee80211_key_alg { 793 ALG_WEP, 794 ALG_TKIP, 795 ALG_CCMP, 796 ALG_AES_CMAC, 797 }; 798 799 /** 800 * enum ieee80211_key_flags - key flags 801 * 802 * These flags are used for communication about keys between the driver 803 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 804 * 805 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 806 * that the STA this key will be used with could be using QoS. 807 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 808 * driver to indicate that it requires IV generation for this 809 * particular key. 810 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 811 * the driver for a TKIP key if it requires Michael MIC 812 * generation in software. 813 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 814 * that the key is pairwise rather then a shared key. 815 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 816 * CCMP key if it requires CCMP encryption of management frames (MFP) to 817 * be done in software. 818 */ 819 enum ieee80211_key_flags { 820 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 821 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 822 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 823 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 824 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 825 }; 826 827 /** 828 * struct ieee80211_key_conf - key information 829 * 830 * This key information is given by mac80211 to the driver by 831 * the set_key() callback in &struct ieee80211_ops. 832 * 833 * @hw_key_idx: To be set by the driver, this is the key index the driver 834 * wants to be given when a frame is transmitted and needs to be 835 * encrypted in hardware. 836 * @alg: The key algorithm. 837 * @flags: key flags, see &enum ieee80211_key_flags. 838 * @keyidx: the key index (0-3) 839 * @keylen: key material length 840 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 841 * data block: 842 * - Temporal Encryption Key (128 bits) 843 * - Temporal Authenticator Tx MIC Key (64 bits) 844 * - Temporal Authenticator Rx MIC Key (64 bits) 845 * @icv_len: The ICV length for this key type 846 * @iv_len: The IV length for this key type 847 */ 848 struct ieee80211_key_conf { 849 enum ieee80211_key_alg alg; 850 u8 icv_len; 851 u8 iv_len; 852 u8 hw_key_idx; 853 u8 flags; 854 s8 keyidx; 855 u8 keylen; 856 u8 key[0]; 857 }; 858 859 /** 860 * enum set_key_cmd - key command 861 * 862 * Used with the set_key() callback in &struct ieee80211_ops, this 863 * indicates whether a key is being removed or added. 864 * 865 * @SET_KEY: a key is set 866 * @DISABLE_KEY: a key must be disabled 867 */ 868 enum set_key_cmd { 869 SET_KEY, DISABLE_KEY, 870 }; 871 872 /** 873 * struct ieee80211_sta - station table entry 874 * 875 * A station table entry represents a station we are possibly 876 * communicating with. Since stations are RCU-managed in 877 * mac80211, any ieee80211_sta pointer you get access to must 878 * either be protected by rcu_read_lock() explicitly or implicitly, 879 * or you must take good care to not use such a pointer after a 880 * call to your sta_remove callback that removed it. 881 * 882 * @addr: MAC address 883 * @aid: AID we assigned to the station if we're an AP 884 * @supp_rates: Bitmap of supported rates (per band) 885 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 886 * @drv_priv: data area for driver use, will always be aligned to 887 * sizeof(void *), size is determined in hw information. 888 */ 889 struct ieee80211_sta { 890 u32 supp_rates[IEEE80211_NUM_BANDS]; 891 u8 addr[ETH_ALEN]; 892 u16 aid; 893 struct ieee80211_sta_ht_cap ht_cap; 894 895 /* must be last */ 896 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 897 }; 898 899 /** 900 * enum sta_notify_cmd - sta notify command 901 * 902 * Used with the sta_notify() callback in &struct ieee80211_ops, this 903 * indicates if an associated station made a power state transition. 904 * 905 * @STA_NOTIFY_SLEEP: a station is now sleeping 906 * @STA_NOTIFY_AWAKE: a sleeping station woke up 907 */ 908 enum sta_notify_cmd { 909 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 910 }; 911 912 /** 913 * enum ieee80211_tkip_key_type - get tkip key 914 * 915 * Used by drivers which need to get a tkip key for skb. Some drivers need a 916 * phase 1 key, others need a phase 2 key. A single function allows the driver 917 * to get the key, this enum indicates what type of key is required. 918 * 919 * @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key 920 * @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key 921 */ 922 enum ieee80211_tkip_key_type { 923 IEEE80211_TKIP_P1_KEY, 924 IEEE80211_TKIP_P2_KEY, 925 }; 926 927 /** 928 * enum ieee80211_hw_flags - hardware flags 929 * 930 * These flags are used to indicate hardware capabilities to 931 * the stack. Generally, flags here should have their meaning 932 * done in a way that the simplest hardware doesn't need setting 933 * any particular flags. There are some exceptions to this rule, 934 * however, so you are advised to review these flags carefully. 935 * 936 * @IEEE80211_HW_HAS_RATE_CONTROL: 937 * The hardware or firmware includes rate control, and cannot be 938 * controlled by the stack. As such, no rate control algorithm 939 * should be instantiated, and the TX rate reported to userspace 940 * will be taken from the TX status instead of the rate control 941 * algorithm. 942 * Note that this requires that the driver implement a number of 943 * callbacks so it has the correct information, it needs to have 944 * the @set_rts_threshold callback and must look at the BSS config 945 * @use_cts_prot for G/N protection, @use_short_slot for slot 946 * timing in 2.4 GHz and @use_short_preamble for preambles for 947 * CCK frames. 948 * 949 * @IEEE80211_HW_RX_INCLUDES_FCS: 950 * Indicates that received frames passed to the stack include 951 * the FCS at the end. 952 * 953 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 954 * Some wireless LAN chipsets buffer broadcast/multicast frames 955 * for power saving stations in the hardware/firmware and others 956 * rely on the host system for such buffering. This option is used 957 * to configure the IEEE 802.11 upper layer to buffer broadcast and 958 * multicast frames when there are power saving stations so that 959 * the driver can fetch them with ieee80211_get_buffered_bc(). 960 * 961 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 962 * Hardware is not capable of short slot operation on the 2.4 GHz band. 963 * 964 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 965 * Hardware is not capable of receiving frames with short preamble on 966 * the 2.4 GHz band. 967 * 968 * @IEEE80211_HW_SIGNAL_UNSPEC: 969 * Hardware can provide signal values but we don't know its units. We 970 * expect values between 0 and @max_signal. 971 * If possible please provide dB or dBm instead. 972 * 973 * @IEEE80211_HW_SIGNAL_DBM: 974 * Hardware gives signal values in dBm, decibel difference from 975 * one milliwatt. This is the preferred method since it is standardized 976 * between different devices. @max_signal does not need to be set. 977 * 978 * @IEEE80211_HW_SPECTRUM_MGMT: 979 * Hardware supports spectrum management defined in 802.11h 980 * Measurement, Channel Switch, Quieting, TPC 981 * 982 * @IEEE80211_HW_AMPDU_AGGREGATION: 983 * Hardware supports 11n A-MPDU aggregation. 984 * 985 * @IEEE80211_HW_SUPPORTS_PS: 986 * Hardware has power save support (i.e. can go to sleep). 987 * 988 * @IEEE80211_HW_PS_NULLFUNC_STACK: 989 * Hardware requires nullfunc frame handling in stack, implies 990 * stack support for dynamic PS. 991 * 992 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 993 * Hardware has support for dynamic PS. 994 * 995 * @IEEE80211_HW_MFP_CAPABLE: 996 * Hardware supports management frame protection (MFP, IEEE 802.11w). 997 * 998 * @IEEE80211_HW_BEACON_FILTER: 999 * Hardware supports dropping of irrelevant beacon frames to 1000 * avoid waking up cpu. 1001 * 1002 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1003 * Hardware supports static spatial multiplexing powersave, 1004 * ie. can turn off all but one chain even on HT connections 1005 * that should be using more chains. 1006 * 1007 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1008 * Hardware supports dynamic spatial multiplexing powersave, 1009 * ie. can turn off all but one chain and then wake the rest 1010 * up as required after, for example, rts/cts handshake. 1011 * 1012 * @IEEE80211_HW_SUPPORTS_UAPSD: 1013 * Hardware supports Unscheduled Automatic Power Save Delivery 1014 * (U-APSD) in managed mode. The mode is configured with 1015 * conf_tx() operation. 1016 * 1017 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1018 * Hardware can provide ack status reports of Tx frames to 1019 * the stack. 1020 * 1021 * @IEEE80211_HW_CONNECTION_MONITOR: 1022 * The hardware performs its own connection monitoring, including 1023 * periodic keep-alives to the AP and probing the AP on beacon loss. 1024 * When this flag is set, signaling beacon-loss will cause an immediate 1025 * change to disassociated state. 1026 * 1027 * @IEEE80211_HW_SUPPORTS_CQM_RSSI: 1028 * Hardware can do connection quality monitoring - i.e. it can monitor 1029 * connection quality related parameters, such as the RSSI level and 1030 * provide notifications if configured trigger levels are reached. 1031 * 1032 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1033 * This device needs to know the DTIM period for the BSS before 1034 * associating. 1035 */ 1036 enum ieee80211_hw_flags { 1037 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1038 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1039 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1040 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1041 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1042 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1043 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1044 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1045 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1046 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1047 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1048 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1049 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1050 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1051 IEEE80211_HW_BEACON_FILTER = 1<<14, 1052 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1053 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1054 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1055 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1056 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1057 IEEE80211_HW_SUPPORTS_CQM_RSSI = 1<<20, 1058 }; 1059 1060 /** 1061 * struct ieee80211_hw - hardware information and state 1062 * 1063 * This structure contains the configuration and hardware 1064 * information for an 802.11 PHY. 1065 * 1066 * @wiphy: This points to the &struct wiphy allocated for this 1067 * 802.11 PHY. You must fill in the @perm_addr and @dev 1068 * members of this structure using SET_IEEE80211_DEV() 1069 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1070 * bands (with channels, bitrates) are registered here. 1071 * 1072 * @conf: &struct ieee80211_conf, device configuration, don't use. 1073 * 1074 * @priv: pointer to private area that was allocated for driver use 1075 * along with this structure. 1076 * 1077 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1078 * 1079 * @extra_tx_headroom: headroom to reserve in each transmit skb 1080 * for use by the driver (e.g. for transmit headers.) 1081 * 1082 * @channel_change_time: time (in microseconds) it takes to change channels. 1083 * 1084 * @max_signal: Maximum value for signal (rssi) in RX information, used 1085 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1086 * 1087 * @max_listen_interval: max listen interval in units of beacon interval 1088 * that HW supports 1089 * 1090 * @queues: number of available hardware transmit queues for 1091 * data packets. WMM/QoS requires at least four, these 1092 * queues need to have configurable access parameters. 1093 * 1094 * @rate_control_algorithm: rate control algorithm for this hardware. 1095 * If unset (NULL), the default algorithm will be used. Must be 1096 * set before calling ieee80211_register_hw(). 1097 * 1098 * @vif_data_size: size (in bytes) of the drv_priv data area 1099 * within &struct ieee80211_vif. 1100 * @sta_data_size: size (in bytes) of the drv_priv data area 1101 * within &struct ieee80211_sta. 1102 * 1103 * @max_rates: maximum number of alternate rate retry stages 1104 * @max_rate_tries: maximum number of tries for each stage 1105 */ 1106 struct ieee80211_hw { 1107 struct ieee80211_conf conf; 1108 struct wiphy *wiphy; 1109 const char *rate_control_algorithm; 1110 void *priv; 1111 u32 flags; 1112 unsigned int extra_tx_headroom; 1113 int channel_change_time; 1114 int vif_data_size; 1115 int sta_data_size; 1116 u16 queues; 1117 u16 max_listen_interval; 1118 s8 max_signal; 1119 u8 max_rates; 1120 u8 max_rate_tries; 1121 }; 1122 1123 /** 1124 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1125 * 1126 * @wiphy: the &struct wiphy which we want to query 1127 * 1128 * mac80211 drivers can use this to get to their respective 1129 * &struct ieee80211_hw. Drivers wishing to get to their own private 1130 * structure can then access it via hw->priv. Note that mac802111 drivers should 1131 * not use wiphy_priv() to try to get their private driver structure as this 1132 * is already used internally by mac80211. 1133 */ 1134 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1135 1136 /** 1137 * SET_IEEE80211_DEV - set device for 802.11 hardware 1138 * 1139 * @hw: the &struct ieee80211_hw to set the device for 1140 * @dev: the &struct device of this 802.11 device 1141 */ 1142 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1143 { 1144 set_wiphy_dev(hw->wiphy, dev); 1145 } 1146 1147 /** 1148 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1149 * 1150 * @hw: the &struct ieee80211_hw to set the MAC address for 1151 * @addr: the address to set 1152 */ 1153 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1154 { 1155 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1156 } 1157 1158 static inline struct ieee80211_rate * 1159 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1160 const struct ieee80211_tx_info *c) 1161 { 1162 if (WARN_ON(c->control.rates[0].idx < 0)) 1163 return NULL; 1164 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1165 } 1166 1167 static inline struct ieee80211_rate * 1168 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1169 const struct ieee80211_tx_info *c) 1170 { 1171 if (c->control.rts_cts_rate_idx < 0) 1172 return NULL; 1173 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1174 } 1175 1176 static inline struct ieee80211_rate * 1177 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1178 const struct ieee80211_tx_info *c, int idx) 1179 { 1180 if (c->control.rates[idx + 1].idx < 0) 1181 return NULL; 1182 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1183 } 1184 1185 /** 1186 * DOC: Hardware crypto acceleration 1187 * 1188 * mac80211 is capable of taking advantage of many hardware 1189 * acceleration designs for encryption and decryption operations. 1190 * 1191 * The set_key() callback in the &struct ieee80211_ops for a given 1192 * device is called to enable hardware acceleration of encryption and 1193 * decryption. The callback takes a @sta parameter that will be NULL 1194 * for default keys or keys used for transmission only, or point to 1195 * the station information for the peer for individual keys. 1196 * Multiple transmission keys with the same key index may be used when 1197 * VLANs are configured for an access point. 1198 * 1199 * When transmitting, the TX control data will use the @hw_key_idx 1200 * selected by the driver by modifying the &struct ieee80211_key_conf 1201 * pointed to by the @key parameter to the set_key() function. 1202 * 1203 * The set_key() call for the %SET_KEY command should return 0 if 1204 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1205 * added; if you return 0 then hw_key_idx must be assigned to the 1206 * hardware key index, you are free to use the full u8 range. 1207 * 1208 * When the cmd is %DISABLE_KEY then it must succeed. 1209 * 1210 * Note that it is permissible to not decrypt a frame even if a key 1211 * for it has been uploaded to hardware, the stack will not make any 1212 * decision based on whether a key has been uploaded or not but rather 1213 * based on the receive flags. 1214 * 1215 * The &struct ieee80211_key_conf structure pointed to by the @key 1216 * parameter is guaranteed to be valid until another call to set_key() 1217 * removes it, but it can only be used as a cookie to differentiate 1218 * keys. 1219 * 1220 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1221 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1222 * handler. 1223 * The update_tkip_key() call updates the driver with the new phase 1 key. 1224 * This happens everytime the iv16 wraps around (every 65536 packets). The 1225 * set_key() call will happen only once for each key (unless the AP did 1226 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1227 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1228 * handler is software decryption with wrap around of iv16. 1229 */ 1230 1231 /** 1232 * DOC: Powersave support 1233 * 1234 * mac80211 has support for various powersave implementations. 1235 * 1236 * First, it can support hardware that handles all powersaving by itself, 1237 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1238 * flag. In that case, it will be told about the desired powersave mode 1239 * with the %IEEE80211_CONF_PS flag depending on the association status. 1240 * The hardware must take care of sending nullfunc frames when necessary, 1241 * i.e. when entering and leaving powersave mode. The hardware is required 1242 * to look at the AID in beacons and signal to the AP that it woke up when 1243 * it finds traffic directed to it. 1244 * 1245 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1246 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1247 * with hardware wakeup and sleep states. Driver is responsible for waking 1248 * up the hardware before issueing commands to the hardware and putting it 1249 * back to sleep at approriate times. 1250 * 1251 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1252 * buffered multicast/broadcast frames after the beacon. Also it must be 1253 * possible to send frames and receive the acknowledment frame. 1254 * 1255 * Other hardware designs cannot send nullfunc frames by themselves and also 1256 * need software support for parsing the TIM bitmap. This is also supported 1257 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1258 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1259 * required to pass up beacons. The hardware is still required to handle 1260 * waking up for multicast traffic; if it cannot the driver must handle that 1261 * as best as it can, mac80211 is too slow to do that. 1262 * 1263 * Dynamic powersave is an extension to normal powersave in which the 1264 * hardware stays awake for a user-specified period of time after sending a 1265 * frame so that reply frames need not be buffered and therefore delayed to 1266 * the next wakeup. It's compromise of getting good enough latency when 1267 * there's data traffic and still saving significantly power in idle 1268 * periods. 1269 * 1270 * Dynamic powersave is supported by simply mac80211 enabling and disabling 1271 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1272 * flag and mac80211 will handle everything automatically. Additionally, 1273 * hardware having support for the dynamic PS feature may set the 1274 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1275 * dynamic PS mode itself. The driver needs to look at the 1276 * @dynamic_ps_timeout hardware configuration value and use it that value 1277 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1278 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1279 * enabled whenever user has enabled powersave. 1280 * 1281 * Some hardware need to toggle a single shared antenna between WLAN and 1282 * Bluetooth to facilitate co-existence. These types of hardware set 1283 * limitations on the use of host controlled dynamic powersave whenever there 1284 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1285 * driver may request temporarily going into full power save, in order to 1286 * enable toggling the antenna between BT and WLAN. If the driver requests 1287 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1288 * temporarily set to zero until the driver re-enables dynamic powersave. 1289 * 1290 * Driver informs U-APSD client support by enabling 1291 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1292 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1293 * Nullfunc frames and stay awake until the service period has ended. To 1294 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1295 * from that AC are transmitted with powersave enabled. 1296 * 1297 * Note: U-APSD client mode is not yet supported with 1298 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1299 */ 1300 1301 /** 1302 * DOC: Beacon filter support 1303 * 1304 * Some hardware have beacon filter support to reduce host cpu wakeups 1305 * which will reduce system power consumption. It usuallly works so that 1306 * the firmware creates a checksum of the beacon but omits all constantly 1307 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1308 * beacon is forwarded to the host, otherwise it will be just dropped. That 1309 * way the host will only receive beacons where some relevant information 1310 * (for example ERP protection or WMM settings) have changed. 1311 * 1312 * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER 1313 * hardware capability. The driver needs to enable beacon filter support 1314 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1315 * power save is enabled, the stack will not check for beacon loss and the 1316 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1317 * 1318 * The time (or number of beacons missed) until the firmware notifies the 1319 * driver of a beacon loss event (which in turn causes the driver to call 1320 * ieee80211_beacon_loss()) should be configurable and will be controlled 1321 * by mac80211 and the roaming algorithm in the future. 1322 * 1323 * Since there may be constantly changing information elements that nothing 1324 * in the software stack cares about, we will, in the future, have mac80211 1325 * tell the driver which information elements are interesting in the sense 1326 * that we want to see changes in them. This will include 1327 * - a list of information element IDs 1328 * - a list of OUIs for the vendor information element 1329 * 1330 * Ideally, the hardware would filter out any beacons without changes in the 1331 * requested elements, but if it cannot support that it may, at the expense 1332 * of some efficiency, filter out only a subset. For example, if the device 1333 * doesn't support checking for OUIs it should pass up all changes in all 1334 * vendor information elements. 1335 * 1336 * Note that change, for the sake of simplification, also includes information 1337 * elements appearing or disappearing from the beacon. 1338 * 1339 * Some hardware supports an "ignore list" instead, just make sure nothing 1340 * that was requested is on the ignore list, and include commonly changing 1341 * information element IDs in the ignore list, for example 11 (BSS load) and 1342 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1343 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1344 * it could also include some currently unused IDs. 1345 * 1346 * 1347 * In addition to these capabilities, hardware should support notifying the 1348 * host of changes in the beacon RSSI. This is relevant to implement roaming 1349 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1350 * the received data packets). This can consist in notifying the host when 1351 * the RSSI changes significantly or when it drops below or rises above 1352 * configurable thresholds. In the future these thresholds will also be 1353 * configured by mac80211 (which gets them from userspace) to implement 1354 * them as the roaming algorithm requires. 1355 * 1356 * If the hardware cannot implement this, the driver should ask it to 1357 * periodically pass beacon frames to the host so that software can do the 1358 * signal strength threshold checking. 1359 */ 1360 1361 /** 1362 * DOC: Spatial multiplexing power save 1363 * 1364 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1365 * power in an 802.11n implementation. For details on the mechanism 1366 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1367 * "11.2.3 SM power save". 1368 * 1369 * The mac80211 implementation is capable of sending action frames 1370 * to update the AP about the station's SMPS mode, and will instruct 1371 * the driver to enter the specific mode. It will also announce the 1372 * requested SMPS mode during the association handshake. Hardware 1373 * support for this feature is required, and can be indicated by 1374 * hardware flags. 1375 * 1376 * The default mode will be "automatic", which nl80211/cfg80211 1377 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1378 * turned off otherwise. 1379 * 1380 * To support this feature, the driver must set the appropriate 1381 * hardware support flags, and handle the SMPS flag to the config() 1382 * operation. It will then with this mechanism be instructed to 1383 * enter the requested SMPS mode while associated to an HT AP. 1384 */ 1385 1386 /** 1387 * DOC: Frame filtering 1388 * 1389 * mac80211 requires to see many management frames for proper 1390 * operation, and users may want to see many more frames when 1391 * in monitor mode. However, for best CPU usage and power consumption, 1392 * having as few frames as possible percolate through the stack is 1393 * desirable. Hence, the hardware should filter as much as possible. 1394 * 1395 * To achieve this, mac80211 uses filter flags (see below) to tell 1396 * the driver's configure_filter() function which frames should be 1397 * passed to mac80211 and which should be filtered out. 1398 * 1399 * Before configure_filter() is invoked, the prepare_multicast() 1400 * callback is invoked with the parameters @mc_count and @mc_list 1401 * for the combined multicast address list of all virtual interfaces. 1402 * It's use is optional, and it returns a u64 that is passed to 1403 * configure_filter(). Additionally, configure_filter() has the 1404 * arguments @changed_flags telling which flags were changed and 1405 * @total_flags with the new flag states. 1406 * 1407 * If your device has no multicast address filters your driver will 1408 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1409 * parameter to see whether multicast frames should be accepted 1410 * or dropped. 1411 * 1412 * All unsupported flags in @total_flags must be cleared. 1413 * Hardware does not support a flag if it is incapable of _passing_ 1414 * the frame to the stack. Otherwise the driver must ignore 1415 * the flag, but not clear it. 1416 * You must _only_ clear the flag (announce no support for the 1417 * flag to mac80211) if you are not able to pass the packet type 1418 * to the stack (so the hardware always filters it). 1419 * So for example, you should clear @FIF_CONTROL, if your hardware 1420 * always filters control frames. If your hardware always passes 1421 * control frames to the kernel and is incapable of filtering them, 1422 * you do _not_ clear the @FIF_CONTROL flag. 1423 * This rule applies to all other FIF flags as well. 1424 */ 1425 1426 /** 1427 * enum ieee80211_filter_flags - hardware filter flags 1428 * 1429 * These flags determine what the filter in hardware should be 1430 * programmed to let through and what should not be passed to the 1431 * stack. It is always safe to pass more frames than requested, 1432 * but this has negative impact on power consumption. 1433 * 1434 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1435 * think of the BSS as your network segment and then this corresponds 1436 * to the regular ethernet device promiscuous mode. 1437 * 1438 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1439 * by the user or if the hardware is not capable of filtering by 1440 * multicast address. 1441 * 1442 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1443 * %RX_FLAG_FAILED_FCS_CRC for them) 1444 * 1445 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1446 * the %RX_FLAG_FAILED_PLCP_CRC for them 1447 * 1448 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1449 * to the hardware that it should not filter beacons or probe responses 1450 * by BSSID. Filtering them can greatly reduce the amount of processing 1451 * mac80211 needs to do and the amount of CPU wakeups, so you should 1452 * honour this flag if possible. 1453 * 1454 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1455 * is not set then only those addressed to this station. 1456 * 1457 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1458 * 1459 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1460 * those addressed to this station. 1461 */ 1462 enum ieee80211_filter_flags { 1463 FIF_PROMISC_IN_BSS = 1<<0, 1464 FIF_ALLMULTI = 1<<1, 1465 FIF_FCSFAIL = 1<<2, 1466 FIF_PLCPFAIL = 1<<3, 1467 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1468 FIF_CONTROL = 1<<5, 1469 FIF_OTHER_BSS = 1<<6, 1470 FIF_PSPOLL = 1<<7, 1471 }; 1472 1473 /** 1474 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1475 * 1476 * These flags are used with the ampdu_action() callback in 1477 * &struct ieee80211_ops to indicate which action is needed. 1478 * 1479 * Note that drivers MUST be able to deal with a TX aggregation 1480 * session being stopped even before they OK'ed starting it by 1481 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1482 * might receive the addBA frame and send a delBA right away! 1483 * 1484 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1485 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1486 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1487 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1488 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1489 */ 1490 enum ieee80211_ampdu_mlme_action { 1491 IEEE80211_AMPDU_RX_START, 1492 IEEE80211_AMPDU_RX_STOP, 1493 IEEE80211_AMPDU_TX_START, 1494 IEEE80211_AMPDU_TX_STOP, 1495 IEEE80211_AMPDU_TX_OPERATIONAL, 1496 }; 1497 1498 /** 1499 * struct ieee80211_ops - callbacks from mac80211 to the driver 1500 * 1501 * This structure contains various callbacks that the driver may 1502 * handle or, in some cases, must handle, for example to configure 1503 * the hardware to a new channel or to transmit a frame. 1504 * 1505 * @tx: Handler that 802.11 module calls for each transmitted frame. 1506 * skb contains the buffer starting from the IEEE 802.11 header. 1507 * The low-level driver should send the frame out based on 1508 * configuration in the TX control data. This handler should, 1509 * preferably, never fail and stop queues appropriately, more 1510 * importantly, however, it must never fail for A-MPDU-queues. 1511 * This function should return NETDEV_TX_OK except in very 1512 * limited cases. 1513 * Must be implemented and atomic. 1514 * 1515 * @start: Called before the first netdevice attached to the hardware 1516 * is enabled. This should turn on the hardware and must turn on 1517 * frame reception (for possibly enabled monitor interfaces.) 1518 * Returns negative error codes, these may be seen in userspace, 1519 * or zero. 1520 * When the device is started it should not have a MAC address 1521 * to avoid acknowledging frames before a non-monitor device 1522 * is added. 1523 * Must be implemented and can sleep. 1524 * 1525 * @stop: Called after last netdevice attached to the hardware 1526 * is disabled. This should turn off the hardware (at least 1527 * it must turn off frame reception.) 1528 * May be called right after add_interface if that rejects 1529 * an interface. If you added any work onto the mac80211 workqueue 1530 * you should ensure to cancel it on this callback. 1531 * Must be implemented and can sleep. 1532 * 1533 * @add_interface: Called when a netdevice attached to the hardware is 1534 * enabled. Because it is not called for monitor mode devices, @start 1535 * and @stop must be implemented. 1536 * The driver should perform any initialization it needs before 1537 * the device can be enabled. The initial configuration for the 1538 * interface is given in the conf parameter. 1539 * The callback may refuse to add an interface by returning a 1540 * negative error code (which will be seen in userspace.) 1541 * Must be implemented and can sleep. 1542 * 1543 * @remove_interface: Notifies a driver that an interface is going down. 1544 * The @stop callback is called after this if it is the last interface 1545 * and no monitor interfaces are present. 1546 * When all interfaces are removed, the MAC address in the hardware 1547 * must be cleared so the device no longer acknowledges packets, 1548 * the mac_addr member of the conf structure is, however, set to the 1549 * MAC address of the device going away. 1550 * Hence, this callback must be implemented. It can sleep. 1551 * 1552 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1553 * function to change hardware configuration, e.g., channel. 1554 * This function should never fail but returns a negative error code 1555 * if it does. The callback can sleep. 1556 * 1557 * @bss_info_changed: Handler for configuration requests related to BSS 1558 * parameters that may vary during BSS's lifespan, and may affect low 1559 * level driver (e.g. assoc/disassoc status, erp parameters). 1560 * This function should not be used if no BSS has been set, unless 1561 * for association indication. The @changed parameter indicates which 1562 * of the bss parameters has changed when a call is made. The callback 1563 * can sleep. 1564 * 1565 * @prepare_multicast: Prepare for multicast filter configuration. 1566 * This callback is optional, and its return value is passed 1567 * to configure_filter(). This callback must be atomic. 1568 * 1569 * @configure_filter: Configure the device's RX filter. 1570 * See the section "Frame filtering" for more information. 1571 * This callback must be implemented and can sleep. 1572 * 1573 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1574 * must be set or cleared for a given STA. Must be atomic. 1575 * 1576 * @set_key: See the section "Hardware crypto acceleration" 1577 * This callback is only called between add_interface and 1578 * remove_interface calls, i.e. while the given virtual interface 1579 * is enabled. 1580 * Returns a negative error code if the key can't be added. 1581 * The callback can sleep. 1582 * 1583 * @update_tkip_key: See the section "Hardware crypto acceleration" 1584 * This callback will be called in the context of Rx. Called for drivers 1585 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1586 * The callback must be atomic. 1587 * 1588 * @hw_scan: Ask the hardware to service the scan request, no need to start 1589 * the scan state machine in stack. The scan must honour the channel 1590 * configuration done by the regulatory agent in the wiphy's 1591 * registered bands. The hardware (or the driver) needs to make sure 1592 * that power save is disabled. 1593 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1594 * entire IEs after the SSID, so that drivers need not look at these 1595 * at all but just send them after the SSID -- mac80211 includes the 1596 * (extended) supported rates and HT information (where applicable). 1597 * When the scan finishes, ieee80211_scan_completed() must be called; 1598 * note that it also must be called when the scan cannot finish due to 1599 * any error unless this callback returned a negative error code. 1600 * The callback can sleep. 1601 * 1602 * @sw_scan_start: Notifier function that is called just before a software scan 1603 * is started. Can be NULL, if the driver doesn't need this notification. 1604 * The callback can sleep. 1605 * 1606 * @sw_scan_complete: Notifier function that is called just after a 1607 * software scan finished. Can be NULL, if the driver doesn't need 1608 * this notification. 1609 * The callback can sleep. 1610 * 1611 * @get_stats: Return low-level statistics. 1612 * Returns zero if statistics are available. 1613 * The callback can sleep. 1614 * 1615 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1616 * callback should be provided to read the TKIP transmit IVs (both IV32 1617 * and IV16) for the given key from hardware. 1618 * The callback must be atomic. 1619 * 1620 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1621 * The callback can sleep. 1622 * 1623 * @sta_add: Notifies low level driver about addition of an associated station, 1624 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1625 * 1626 * @sta_remove: Notifies low level driver about removal of an associated 1627 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1628 * 1629 * @sta_notify: Notifies low level driver about power state transition of an 1630 * associated station, AP, IBSS/WDS/mesh peer etc. Must be atomic. 1631 * 1632 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1633 * bursting) for a hardware TX queue. 1634 * Returns a negative error code on failure. 1635 * The callback can sleep. 1636 * 1637 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1638 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1639 * required function. 1640 * The callback can sleep. 1641 * 1642 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1643 * Currently, this is only used for IBSS mode debugging. Is not a 1644 * required function. 1645 * The callback can sleep. 1646 * 1647 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1648 * with other STAs in the IBSS. This is only used in IBSS mode. This 1649 * function is optional if the firmware/hardware takes full care of 1650 * TSF synchronization. 1651 * The callback can sleep. 1652 * 1653 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1654 * This is needed only for IBSS mode and the result of this function is 1655 * used to determine whether to reply to Probe Requests. 1656 * Returns non-zero if this device sent the last beacon. 1657 * The callback can sleep. 1658 * 1659 * @ampdu_action: Perform a certain A-MPDU action 1660 * The RA/TID combination determines the destination and TID we want 1661 * the ampdu action to be performed for. The action is defined through 1662 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1663 * is the first frame we expect to perform the action on. Notice 1664 * that TX/RX_STOP can pass NULL for this parameter. 1665 * Returns a negative error code on failure. 1666 * The callback can sleep. 1667 * 1668 * @get_survey: Return per-channel survey information 1669 * 1670 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 1671 * need to set wiphy->rfkill_poll to %true before registration, 1672 * and need to call wiphy_rfkill_set_hw_state() in the callback. 1673 * The callback can sleep. 1674 * 1675 * @set_coverage_class: Set slot time for given coverage class as specified 1676 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 1677 * accordingly. This callback is not required and may sleep. 1678 * 1679 * @testmode_cmd: Implement a cfg80211 test mode command. 1680 * The callback can sleep. 1681 * 1682 * @flush: Flush all pending frames from the hardware queue, making sure 1683 * that the hardware queues are empty. If the parameter @drop is set 1684 * to %true, pending frames may be dropped. The callback can sleep. 1685 * 1686 * @channel_switch: Drivers that need (or want) to offload the channel 1687 * switch operation for CSAs received from the AP may implement this 1688 * callback. They must then call ieee80211_chswitch_done() to indicate 1689 * completion of the channel switch. 1690 */ 1691 struct ieee80211_ops { 1692 int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1693 int (*start)(struct ieee80211_hw *hw); 1694 void (*stop)(struct ieee80211_hw *hw); 1695 int (*add_interface)(struct ieee80211_hw *hw, 1696 struct ieee80211_vif *vif); 1697 void (*remove_interface)(struct ieee80211_hw *hw, 1698 struct ieee80211_vif *vif); 1699 int (*config)(struct ieee80211_hw *hw, u32 changed); 1700 void (*bss_info_changed)(struct ieee80211_hw *hw, 1701 struct ieee80211_vif *vif, 1702 struct ieee80211_bss_conf *info, 1703 u32 changed); 1704 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 1705 struct netdev_hw_addr_list *mc_list); 1706 void (*configure_filter)(struct ieee80211_hw *hw, 1707 unsigned int changed_flags, 1708 unsigned int *total_flags, 1709 u64 multicast); 1710 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 1711 bool set); 1712 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1713 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 1714 struct ieee80211_key_conf *key); 1715 void (*update_tkip_key)(struct ieee80211_hw *hw, 1716 struct ieee80211_vif *vif, 1717 struct ieee80211_key_conf *conf, 1718 struct ieee80211_sta *sta, 1719 u32 iv32, u16 *phase1key); 1720 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1721 struct cfg80211_scan_request *req); 1722 void (*sw_scan_start)(struct ieee80211_hw *hw); 1723 void (*sw_scan_complete)(struct ieee80211_hw *hw); 1724 int (*get_stats)(struct ieee80211_hw *hw, 1725 struct ieee80211_low_level_stats *stats); 1726 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 1727 u32 *iv32, u16 *iv16); 1728 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 1729 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1730 struct ieee80211_sta *sta); 1731 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1732 struct ieee80211_sta *sta); 1733 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1734 enum sta_notify_cmd, struct ieee80211_sta *sta); 1735 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 1736 const struct ieee80211_tx_queue_params *params); 1737 u64 (*get_tsf)(struct ieee80211_hw *hw); 1738 void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf); 1739 void (*reset_tsf)(struct ieee80211_hw *hw); 1740 int (*tx_last_beacon)(struct ieee80211_hw *hw); 1741 int (*ampdu_action)(struct ieee80211_hw *hw, 1742 struct ieee80211_vif *vif, 1743 enum ieee80211_ampdu_mlme_action action, 1744 struct ieee80211_sta *sta, u16 tid, u16 *ssn); 1745 int (*get_survey)(struct ieee80211_hw *hw, int idx, 1746 struct survey_info *survey); 1747 void (*rfkill_poll)(struct ieee80211_hw *hw); 1748 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 1749 #ifdef CONFIG_NL80211_TESTMODE 1750 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 1751 #endif 1752 void (*flush)(struct ieee80211_hw *hw, bool drop); 1753 void (*channel_switch)(struct ieee80211_hw *hw, 1754 struct ieee80211_channel_switch *ch_switch); 1755 }; 1756 1757 /** 1758 * ieee80211_alloc_hw - Allocate a new hardware device 1759 * 1760 * This must be called once for each hardware device. The returned pointer 1761 * must be used to refer to this device when calling other functions. 1762 * mac80211 allocates a private data area for the driver pointed to by 1763 * @priv in &struct ieee80211_hw, the size of this area is given as 1764 * @priv_data_len. 1765 * 1766 * @priv_data_len: length of private data 1767 * @ops: callbacks for this device 1768 */ 1769 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 1770 const struct ieee80211_ops *ops); 1771 1772 /** 1773 * ieee80211_register_hw - Register hardware device 1774 * 1775 * You must call this function before any other functions in 1776 * mac80211. Note that before a hardware can be registered, you 1777 * need to fill the contained wiphy's information. 1778 * 1779 * @hw: the device to register as returned by ieee80211_alloc_hw() 1780 */ 1781 int ieee80211_register_hw(struct ieee80211_hw *hw); 1782 1783 #ifdef CONFIG_MAC80211_LEDS 1784 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 1785 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 1786 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 1787 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 1788 #endif 1789 /** 1790 * ieee80211_get_tx_led_name - get name of TX LED 1791 * 1792 * mac80211 creates a transmit LED trigger for each wireless hardware 1793 * that can be used to drive LEDs if your driver registers a LED device. 1794 * This function returns the name (or %NULL if not configured for LEDs) 1795 * of the trigger so you can automatically link the LED device. 1796 * 1797 * @hw: the hardware to get the LED trigger name for 1798 */ 1799 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 1800 { 1801 #ifdef CONFIG_MAC80211_LEDS 1802 return __ieee80211_get_tx_led_name(hw); 1803 #else 1804 return NULL; 1805 #endif 1806 } 1807 1808 /** 1809 * ieee80211_get_rx_led_name - get name of RX LED 1810 * 1811 * mac80211 creates a receive LED trigger for each wireless hardware 1812 * that can be used to drive LEDs if your driver registers a LED device. 1813 * This function returns the name (or %NULL if not configured for LEDs) 1814 * of the trigger so you can automatically link the LED device. 1815 * 1816 * @hw: the hardware to get the LED trigger name for 1817 */ 1818 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 1819 { 1820 #ifdef CONFIG_MAC80211_LEDS 1821 return __ieee80211_get_rx_led_name(hw); 1822 #else 1823 return NULL; 1824 #endif 1825 } 1826 1827 /** 1828 * ieee80211_get_assoc_led_name - get name of association LED 1829 * 1830 * mac80211 creates a association LED trigger for each wireless hardware 1831 * that can be used to drive LEDs if your driver registers a LED device. 1832 * This function returns the name (or %NULL if not configured for LEDs) 1833 * of the trigger so you can automatically link the LED device. 1834 * 1835 * @hw: the hardware to get the LED trigger name for 1836 */ 1837 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 1838 { 1839 #ifdef CONFIG_MAC80211_LEDS 1840 return __ieee80211_get_assoc_led_name(hw); 1841 #else 1842 return NULL; 1843 #endif 1844 } 1845 1846 /** 1847 * ieee80211_get_radio_led_name - get name of radio LED 1848 * 1849 * mac80211 creates a radio change LED trigger for each wireless hardware 1850 * that can be used to drive LEDs if your driver registers a LED device. 1851 * This function returns the name (or %NULL if not configured for LEDs) 1852 * of the trigger so you can automatically link the LED device. 1853 * 1854 * @hw: the hardware to get the LED trigger name for 1855 */ 1856 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 1857 { 1858 #ifdef CONFIG_MAC80211_LEDS 1859 return __ieee80211_get_radio_led_name(hw); 1860 #else 1861 return NULL; 1862 #endif 1863 } 1864 1865 /** 1866 * ieee80211_unregister_hw - Unregister a hardware device 1867 * 1868 * This function instructs mac80211 to free allocated resources 1869 * and unregister netdevices from the networking subsystem. 1870 * 1871 * @hw: the hardware to unregister 1872 */ 1873 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 1874 1875 /** 1876 * ieee80211_free_hw - free hardware descriptor 1877 * 1878 * This function frees everything that was allocated, including the 1879 * private data for the driver. You must call ieee80211_unregister_hw() 1880 * before calling this function. 1881 * 1882 * @hw: the hardware to free 1883 */ 1884 void ieee80211_free_hw(struct ieee80211_hw *hw); 1885 1886 /** 1887 * ieee80211_restart_hw - restart hardware completely 1888 * 1889 * Call this function when the hardware was restarted for some reason 1890 * (hardware error, ...) and the driver is unable to restore its state 1891 * by itself. mac80211 assumes that at this point the driver/hardware 1892 * is completely uninitialised and stopped, it starts the process by 1893 * calling the ->start() operation. The driver will need to reset all 1894 * internal state that it has prior to calling this function. 1895 * 1896 * @hw: the hardware to restart 1897 */ 1898 void ieee80211_restart_hw(struct ieee80211_hw *hw); 1899 1900 /** 1901 * ieee80211_rx - receive frame 1902 * 1903 * Use this function to hand received frames to mac80211. The receive 1904 * buffer in @skb must start with an IEEE 802.11 header. In case of a 1905 * paged @skb is used, the driver is recommended to put the ieee80211 1906 * header of the frame on the linear part of the @skb to avoid memory 1907 * allocation and/or memcpy by the stack. 1908 * 1909 * This function may not be called in IRQ context. Calls to this function 1910 * for a single hardware must be synchronized against each other. Calls to 1911 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 1912 * mixed for a single hardware. 1913 * 1914 * In process context use instead ieee80211_rx_ni(). 1915 * 1916 * @hw: the hardware this frame came in on 1917 * @skb: the buffer to receive, owned by mac80211 after this call 1918 */ 1919 void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 1920 1921 /** 1922 * ieee80211_rx_irqsafe - receive frame 1923 * 1924 * Like ieee80211_rx() but can be called in IRQ context 1925 * (internally defers to a tasklet.) 1926 * 1927 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 1928 * be mixed for a single hardware. 1929 * 1930 * @hw: the hardware this frame came in on 1931 * @skb: the buffer to receive, owned by mac80211 after this call 1932 */ 1933 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 1934 1935 /** 1936 * ieee80211_rx_ni - receive frame (in process context) 1937 * 1938 * Like ieee80211_rx() but can be called in process context 1939 * (internally disables bottom halves). 1940 * 1941 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 1942 * not be mixed for a single hardware. 1943 * 1944 * @hw: the hardware this frame came in on 1945 * @skb: the buffer to receive, owned by mac80211 after this call 1946 */ 1947 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 1948 struct sk_buff *skb) 1949 { 1950 local_bh_disable(); 1951 ieee80211_rx(hw, skb); 1952 local_bh_enable(); 1953 } 1954 1955 /* 1956 * The TX headroom reserved by mac80211 for its own tx_status functions. 1957 * This is enough for the radiotap header. 1958 */ 1959 #define IEEE80211_TX_STATUS_HEADROOM 13 1960 1961 /** 1962 * ieee80211_tx_status - transmit status callback 1963 * 1964 * Call this function for all transmitted frames after they have been 1965 * transmitted. It is permissible to not call this function for 1966 * multicast frames but this can affect statistics. 1967 * 1968 * This function may not be called in IRQ context. Calls to this function 1969 * for a single hardware must be synchronized against each other. Calls 1970 * to this function and ieee80211_tx_status_irqsafe() may not be mixed 1971 * for a single hardware. 1972 * 1973 * @hw: the hardware the frame was transmitted by 1974 * @skb: the frame that was transmitted, owned by mac80211 after this call 1975 */ 1976 void ieee80211_tx_status(struct ieee80211_hw *hw, 1977 struct sk_buff *skb); 1978 1979 /** 1980 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 1981 * 1982 * Like ieee80211_tx_status() but can be called in IRQ context 1983 * (internally defers to a tasklet.) 1984 * 1985 * Calls to this function and ieee80211_tx_status() may not be mixed for a 1986 * single hardware. 1987 * 1988 * @hw: the hardware the frame was transmitted by 1989 * @skb: the frame that was transmitted, owned by mac80211 after this call 1990 */ 1991 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 1992 struct sk_buff *skb); 1993 1994 /** 1995 * ieee80211_beacon_get_tim - beacon generation function 1996 * @hw: pointer obtained from ieee80211_alloc_hw(). 1997 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 1998 * @tim_offset: pointer to variable that will receive the TIM IE offset. 1999 * Set to 0 if invalid (in non-AP modes). 2000 * @tim_length: pointer to variable that will receive the TIM IE length, 2001 * (including the ID and length bytes!). 2002 * Set to 0 if invalid (in non-AP modes). 2003 * 2004 * If the driver implements beaconing modes, it must use this function to 2005 * obtain the beacon frame/template. 2006 * 2007 * If the beacon frames are generated by the host system (i.e., not in 2008 * hardware/firmware), the driver uses this function to get each beacon 2009 * frame from mac80211 -- it is responsible for calling this function 2010 * before the beacon is needed (e.g. based on hardware interrupt). 2011 * 2012 * If the beacon frames are generated by the device, then the driver 2013 * must use the returned beacon as the template and change the TIM IE 2014 * according to the current DTIM parameters/TIM bitmap. 2015 * 2016 * The driver is responsible for freeing the returned skb. 2017 */ 2018 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2019 struct ieee80211_vif *vif, 2020 u16 *tim_offset, u16 *tim_length); 2021 2022 /** 2023 * ieee80211_beacon_get - beacon generation function 2024 * @hw: pointer obtained from ieee80211_alloc_hw(). 2025 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2026 * 2027 * See ieee80211_beacon_get_tim(). 2028 */ 2029 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2030 struct ieee80211_vif *vif) 2031 { 2032 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2033 } 2034 2035 /** 2036 * ieee80211_pspoll_get - retrieve a PS Poll template 2037 * @hw: pointer obtained from ieee80211_alloc_hw(). 2038 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2039 * 2040 * Creates a PS Poll a template which can, for example, uploaded to 2041 * hardware. The template must be updated after association so that correct 2042 * AID, BSSID and MAC address is used. 2043 * 2044 * Note: Caller (or hardware) is responsible for setting the 2045 * &IEEE80211_FCTL_PM bit. 2046 */ 2047 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2048 struct ieee80211_vif *vif); 2049 2050 /** 2051 * ieee80211_nullfunc_get - retrieve a nullfunc template 2052 * @hw: pointer obtained from ieee80211_alloc_hw(). 2053 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2054 * 2055 * Creates a Nullfunc template which can, for example, uploaded to 2056 * hardware. The template must be updated after association so that correct 2057 * BSSID and address is used. 2058 * 2059 * Note: Caller (or hardware) is responsible for setting the 2060 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2061 */ 2062 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2063 struct ieee80211_vif *vif); 2064 2065 /** 2066 * ieee80211_probereq_get - retrieve a Probe Request template 2067 * @hw: pointer obtained from ieee80211_alloc_hw(). 2068 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2069 * @ssid: SSID buffer 2070 * @ssid_len: length of SSID 2071 * @ie: buffer containing all IEs except SSID for the template 2072 * @ie_len: length of the IE buffer 2073 * 2074 * Creates a Probe Request template which can, for example, be uploaded to 2075 * hardware. 2076 */ 2077 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2078 struct ieee80211_vif *vif, 2079 const u8 *ssid, size_t ssid_len, 2080 const u8 *ie, size_t ie_len); 2081 2082 /** 2083 * ieee80211_rts_get - RTS frame generation function 2084 * @hw: pointer obtained from ieee80211_alloc_hw(). 2085 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2086 * @frame: pointer to the frame that is going to be protected by the RTS. 2087 * @frame_len: the frame length (in octets). 2088 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2089 * @rts: The buffer where to store the RTS frame. 2090 * 2091 * If the RTS frames are generated by the host system (i.e., not in 2092 * hardware/firmware), the low-level driver uses this function to receive 2093 * the next RTS frame from the 802.11 code. The low-level is responsible 2094 * for calling this function before and RTS frame is needed. 2095 */ 2096 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2097 const void *frame, size_t frame_len, 2098 const struct ieee80211_tx_info *frame_txctl, 2099 struct ieee80211_rts *rts); 2100 2101 /** 2102 * ieee80211_rts_duration - Get the duration field for an RTS frame 2103 * @hw: pointer obtained from ieee80211_alloc_hw(). 2104 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2105 * @frame_len: the length of the frame that is going to be protected by the RTS. 2106 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2107 * 2108 * If the RTS is generated in firmware, but the host system must provide 2109 * the duration field, the low-level driver uses this function to receive 2110 * the duration field value in little-endian byteorder. 2111 */ 2112 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2113 struct ieee80211_vif *vif, size_t frame_len, 2114 const struct ieee80211_tx_info *frame_txctl); 2115 2116 /** 2117 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2118 * @hw: pointer obtained from ieee80211_alloc_hw(). 2119 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2120 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2121 * @frame_len: the frame length (in octets). 2122 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2123 * @cts: The buffer where to store the CTS-to-self frame. 2124 * 2125 * If the CTS-to-self frames are generated by the host system (i.e., not in 2126 * hardware/firmware), the low-level driver uses this function to receive 2127 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2128 * for calling this function before and CTS-to-self frame is needed. 2129 */ 2130 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2131 struct ieee80211_vif *vif, 2132 const void *frame, size_t frame_len, 2133 const struct ieee80211_tx_info *frame_txctl, 2134 struct ieee80211_cts *cts); 2135 2136 /** 2137 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2138 * @hw: pointer obtained from ieee80211_alloc_hw(). 2139 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2140 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2141 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2142 * 2143 * If the CTS-to-self is generated in firmware, but the host system must provide 2144 * the duration field, the low-level driver uses this function to receive 2145 * the duration field value in little-endian byteorder. 2146 */ 2147 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2148 struct ieee80211_vif *vif, 2149 size_t frame_len, 2150 const struct ieee80211_tx_info *frame_txctl); 2151 2152 /** 2153 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2154 * @hw: pointer obtained from ieee80211_alloc_hw(). 2155 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2156 * @frame_len: the length of the frame. 2157 * @rate: the rate at which the frame is going to be transmitted. 2158 * 2159 * Calculate the duration field of some generic frame, given its 2160 * length and transmission rate (in 100kbps). 2161 */ 2162 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2163 struct ieee80211_vif *vif, 2164 size_t frame_len, 2165 struct ieee80211_rate *rate); 2166 2167 /** 2168 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2169 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2170 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2171 * 2172 * Function for accessing buffered broadcast and multicast frames. If 2173 * hardware/firmware does not implement buffering of broadcast/multicast 2174 * frames when power saving is used, 802.11 code buffers them in the host 2175 * memory. The low-level driver uses this function to fetch next buffered 2176 * frame. In most cases, this is used when generating beacon frame. This 2177 * function returns a pointer to the next buffered skb or NULL if no more 2178 * buffered frames are available. 2179 * 2180 * Note: buffered frames are returned only after DTIM beacon frame was 2181 * generated with ieee80211_beacon_get() and the low-level driver must thus 2182 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2183 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2184 * does not need to check for DTIM beacons separately and should be able to 2185 * use common code for all beacons. 2186 */ 2187 struct sk_buff * 2188 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2189 2190 /** 2191 * ieee80211_get_tkip_key - get a TKIP rc4 for skb 2192 * 2193 * This function computes a TKIP rc4 key for an skb. It computes 2194 * a phase 1 key if needed (iv16 wraps around). This function is to 2195 * be used by drivers which can do HW encryption but need to compute 2196 * to phase 1/2 key in SW. 2197 * 2198 * @keyconf: the parameter passed with the set key 2199 * @skb: the skb for which the key is needed 2200 * @type: TBD 2201 * @key: a buffer to which the key will be written 2202 */ 2203 void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf, 2204 struct sk_buff *skb, 2205 enum ieee80211_tkip_key_type type, u8 *key); 2206 /** 2207 * ieee80211_wake_queue - wake specific queue 2208 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2209 * @queue: queue number (counted from zero). 2210 * 2211 * Drivers should use this function instead of netif_wake_queue. 2212 */ 2213 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 2214 2215 /** 2216 * ieee80211_stop_queue - stop specific queue 2217 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2218 * @queue: queue number (counted from zero). 2219 * 2220 * Drivers should use this function instead of netif_stop_queue. 2221 */ 2222 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 2223 2224 /** 2225 * ieee80211_queue_stopped - test status of the queue 2226 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2227 * @queue: queue number (counted from zero). 2228 * 2229 * Drivers should use this function instead of netif_stop_queue. 2230 */ 2231 2232 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 2233 2234 /** 2235 * ieee80211_stop_queues - stop all queues 2236 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2237 * 2238 * Drivers should use this function instead of netif_stop_queue. 2239 */ 2240 void ieee80211_stop_queues(struct ieee80211_hw *hw); 2241 2242 /** 2243 * ieee80211_wake_queues - wake all queues 2244 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2245 * 2246 * Drivers should use this function instead of netif_wake_queue. 2247 */ 2248 void ieee80211_wake_queues(struct ieee80211_hw *hw); 2249 2250 /** 2251 * ieee80211_scan_completed - completed hardware scan 2252 * 2253 * When hardware scan offload is used (i.e. the hw_scan() callback is 2254 * assigned) this function needs to be called by the driver to notify 2255 * mac80211 that the scan finished. 2256 * 2257 * @hw: the hardware that finished the scan 2258 * @aborted: set to true if scan was aborted 2259 */ 2260 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 2261 2262 /** 2263 * ieee80211_iterate_active_interfaces - iterate active interfaces 2264 * 2265 * This function iterates over the interfaces associated with a given 2266 * hardware that are currently active and calls the callback for them. 2267 * This function allows the iterator function to sleep, when the iterator 2268 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 2269 * be used. 2270 * 2271 * @hw: the hardware struct of which the interfaces should be iterated over 2272 * @iterator: the iterator function to call 2273 * @data: first argument of the iterator function 2274 */ 2275 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 2276 void (*iterator)(void *data, u8 *mac, 2277 struct ieee80211_vif *vif), 2278 void *data); 2279 2280 /** 2281 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 2282 * 2283 * This function iterates over the interfaces associated with a given 2284 * hardware that are currently active and calls the callback for them. 2285 * This function requires the iterator callback function to be atomic, 2286 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 2287 * 2288 * @hw: the hardware struct of which the interfaces should be iterated over 2289 * @iterator: the iterator function to call, cannot sleep 2290 * @data: first argument of the iterator function 2291 */ 2292 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 2293 void (*iterator)(void *data, 2294 u8 *mac, 2295 struct ieee80211_vif *vif), 2296 void *data); 2297 2298 /** 2299 * ieee80211_queue_work - add work onto the mac80211 workqueue 2300 * 2301 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 2302 * This helper ensures drivers are not queueing work when they should not be. 2303 * 2304 * @hw: the hardware struct for the interface we are adding work for 2305 * @work: the work we want to add onto the mac80211 workqueue 2306 */ 2307 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 2308 2309 /** 2310 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 2311 * 2312 * Drivers and mac80211 use this to queue delayed work onto the mac80211 2313 * workqueue. 2314 * 2315 * @hw: the hardware struct for the interface we are adding work for 2316 * @dwork: delayable work to queue onto the mac80211 workqueue 2317 * @delay: number of jiffies to wait before queueing 2318 */ 2319 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 2320 struct delayed_work *dwork, 2321 unsigned long delay); 2322 2323 /** 2324 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 2325 * @sta: the station for which to start a BA session 2326 * @tid: the TID to BA on. 2327 * 2328 * Return: success if addBA request was sent, failure otherwise 2329 * 2330 * Although mac80211/low level driver/user space application can estimate 2331 * the need to start aggregation on a certain RA/TID, the session level 2332 * will be managed by the mac80211. 2333 */ 2334 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2335 2336 /** 2337 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 2338 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2339 * @ra: receiver address of the BA session recipient. 2340 * @tid: the TID to BA on. 2341 * 2342 * This function must be called by low level driver once it has 2343 * finished with preparations for the BA session. It can be called 2344 * from any context. 2345 */ 2346 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2347 u16 tid); 2348 2349 /** 2350 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 2351 * @sta: the station whose BA session to stop 2352 * @tid: the TID to stop BA. 2353 * 2354 * Return: negative error if the TID is invalid, or no aggregation active 2355 * 2356 * Although mac80211/low level driver/user space application can estimate 2357 * the need to stop aggregation on a certain RA/TID, the session level 2358 * will be managed by the mac80211. 2359 */ 2360 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2361 2362 /** 2363 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 2364 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2365 * @ra: receiver address of the BA session recipient. 2366 * @tid: the desired TID to BA on. 2367 * 2368 * This function must be called by low level driver once it has 2369 * finished with preparations for the BA session tear down. It 2370 * can be called from any context. 2371 */ 2372 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2373 u16 tid); 2374 2375 /** 2376 * ieee80211_find_sta - find a station 2377 * 2378 * @vif: virtual interface to look for station on 2379 * @addr: station's address 2380 * 2381 * This function must be called under RCU lock and the 2382 * resulting pointer is only valid under RCU lock as well. 2383 */ 2384 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 2385 const u8 *addr); 2386 2387 /** 2388 * ieee80211_find_sta_by_hw - find a station on hardware 2389 * 2390 * @hw: pointer as obtained from ieee80211_alloc_hw() 2391 * @addr: station's address 2392 * 2393 * This function must be called under RCU lock and the 2394 * resulting pointer is only valid under RCU lock as well. 2395 * 2396 * NOTE: This function should not be used! When mac80211 is converted 2397 * internally to properly keep track of stations on multiple 2398 * virtual interfaces, it will not always know which station to 2399 * return here since a single address might be used by multiple 2400 * logical stations (e.g. consider a station connecting to another 2401 * BSSID on the same AP hardware without disconnecting first). 2402 * 2403 * DO NOT USE THIS FUNCTION. 2404 */ 2405 struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw, 2406 const u8 *addr); 2407 2408 /** 2409 * ieee80211_sta_block_awake - block station from waking up 2410 * @hw: the hardware 2411 * @pubsta: the station 2412 * @block: whether to block or unblock 2413 * 2414 * Some devices require that all frames that are on the queues 2415 * for a specific station that went to sleep are flushed before 2416 * a poll response or frames after the station woke up can be 2417 * delivered to that it. Note that such frames must be rejected 2418 * by the driver as filtered, with the appropriate status flag. 2419 * 2420 * This function allows implementing this mode in a race-free 2421 * manner. 2422 * 2423 * To do this, a driver must keep track of the number of frames 2424 * still enqueued for a specific station. If this number is not 2425 * zero when the station goes to sleep, the driver must call 2426 * this function to force mac80211 to consider the station to 2427 * be asleep regardless of the station's actual state. Once the 2428 * number of outstanding frames reaches zero, the driver must 2429 * call this function again to unblock the station. That will 2430 * cause mac80211 to be able to send ps-poll responses, and if 2431 * the station queried in the meantime then frames will also 2432 * be sent out as a result of this. Additionally, the driver 2433 * will be notified that the station woke up some time after 2434 * it is unblocked, regardless of whether the station actually 2435 * woke up while blocked or not. 2436 */ 2437 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 2438 struct ieee80211_sta *pubsta, bool block); 2439 2440 /** 2441 * ieee80211_beacon_loss - inform hardware does not receive beacons 2442 * 2443 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2444 * 2445 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTERING and 2446 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 2447 * hardware is not receiving beacons with this function. 2448 */ 2449 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 2450 2451 /** 2452 * ieee80211_connection_loss - inform hardware has lost connection to the AP 2453 * 2454 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2455 * 2456 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTERING, and 2457 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 2458 * needs to inform if the connection to the AP has been lost. 2459 * 2460 * This function will cause immediate change to disassociated state, 2461 * without connection recovery attempts. 2462 */ 2463 void ieee80211_connection_loss(struct ieee80211_vif *vif); 2464 2465 /** 2466 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 2467 * 2468 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2469 * 2470 * Some hardware require full power save to manage simultaneous BT traffic 2471 * on the WLAN frequency. Full PSM is required periodically, whenever there are 2472 * burst of BT traffic. The hardware gets information of BT traffic via 2473 * hardware co-existence lines, and consequentially requests mac80211 to 2474 * (temporarily) enter full psm. 2475 * This function will only temporarily disable dynamic PS, not enable PSM if 2476 * it was not already enabled. 2477 * The driver must make sure to re-enable dynamic PS using 2478 * ieee80211_enable_dyn_ps() if the driver has disabled it. 2479 * 2480 */ 2481 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 2482 2483 /** 2484 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 2485 * 2486 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2487 * 2488 * This function restores dynamic PS after being temporarily disabled via 2489 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 2490 * be coupled with an eventual call to this function. 2491 * 2492 */ 2493 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 2494 2495 /** 2496 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 2497 * rssi threshold triggered 2498 * 2499 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2500 * @rssi_event: the RSSI trigger event type 2501 * @gfp: context flags 2502 * 2503 * When the %IEEE80211_HW_SUPPORTS_CQM_RSSI is set, and a connection quality 2504 * monitoring is configured with an rssi threshold, the driver will inform 2505 * whenever the rssi level reaches the threshold. 2506 */ 2507 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 2508 enum nl80211_cqm_rssi_threshold_event rssi_event, 2509 gfp_t gfp); 2510 2511 /** 2512 * ieee80211_chswitch_done - Complete channel switch process 2513 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2514 * @success: make the channel switch successful or not 2515 * 2516 * Complete the channel switch post-process: set the new operational channel 2517 * and wake up the suspended queues. 2518 */ 2519 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 2520 2521 /* Rate control API */ 2522 2523 /** 2524 * enum rate_control_changed - flags to indicate which parameter changed 2525 * 2526 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 2527 * changed, rate control algorithm can update its internal state if needed. 2528 */ 2529 enum rate_control_changed { 2530 IEEE80211_RC_HT_CHANGED = BIT(0) 2531 }; 2532 2533 /** 2534 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 2535 * 2536 * @hw: The hardware the algorithm is invoked for. 2537 * @sband: The band this frame is being transmitted on. 2538 * @bss_conf: the current BSS configuration 2539 * @reported_rate: The rate control algorithm can fill this in to indicate 2540 * which rate should be reported to userspace as the current rate and 2541 * used for rate calculations in the mesh network. 2542 * @rts: whether RTS will be used for this frame because it is longer than the 2543 * RTS threshold 2544 * @short_preamble: whether mac80211 will request short-preamble transmission 2545 * if the selected rate supports it 2546 * @max_rate_idx: user-requested maximum rate (not MCS for now) 2547 * (deprecated; this will be removed once drivers get updated to use 2548 * rate_idx_mask) 2549 * @rate_idx_mask: user-requested rate mask (not MCS for now) 2550 * @skb: the skb that will be transmitted, the control information in it needs 2551 * to be filled in 2552 * @ap: whether this frame is sent out in AP mode 2553 */ 2554 struct ieee80211_tx_rate_control { 2555 struct ieee80211_hw *hw; 2556 struct ieee80211_supported_band *sband; 2557 struct ieee80211_bss_conf *bss_conf; 2558 struct sk_buff *skb; 2559 struct ieee80211_tx_rate reported_rate; 2560 bool rts, short_preamble; 2561 u8 max_rate_idx; 2562 u32 rate_idx_mask; 2563 bool ap; 2564 }; 2565 2566 struct rate_control_ops { 2567 struct module *module; 2568 const char *name; 2569 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 2570 void (*free)(void *priv); 2571 2572 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 2573 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 2574 struct ieee80211_sta *sta, void *priv_sta); 2575 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 2576 struct ieee80211_sta *sta, 2577 void *priv_sta, u32 changed, 2578 enum nl80211_channel_type oper_chan_type); 2579 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 2580 void *priv_sta); 2581 2582 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 2583 struct ieee80211_sta *sta, void *priv_sta, 2584 struct sk_buff *skb); 2585 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 2586 struct ieee80211_tx_rate_control *txrc); 2587 2588 void (*add_sta_debugfs)(void *priv, void *priv_sta, 2589 struct dentry *dir); 2590 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 2591 }; 2592 2593 static inline int rate_supported(struct ieee80211_sta *sta, 2594 enum ieee80211_band band, 2595 int index) 2596 { 2597 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 2598 } 2599 2600 /** 2601 * rate_control_send_low - helper for drivers for management/no-ack frames 2602 * 2603 * Rate control algorithms that agree to use the lowest rate to 2604 * send management frames and NO_ACK data with the respective hw 2605 * retries should use this in the beginning of their mac80211 get_rate 2606 * callback. If true is returned the rate control can simply return. 2607 * If false is returned we guarantee that sta and sta and priv_sta is 2608 * not null. 2609 * 2610 * Rate control algorithms wishing to do more intelligent selection of 2611 * rate for multicast/broadcast frames may choose to not use this. 2612 * 2613 * @sta: &struct ieee80211_sta pointer to the target destination. Note 2614 * that this may be null. 2615 * @priv_sta: private rate control structure. This may be null. 2616 * @txrc: rate control information we sholud populate for mac80211. 2617 */ 2618 bool rate_control_send_low(struct ieee80211_sta *sta, 2619 void *priv_sta, 2620 struct ieee80211_tx_rate_control *txrc); 2621 2622 2623 static inline s8 2624 rate_lowest_index(struct ieee80211_supported_band *sband, 2625 struct ieee80211_sta *sta) 2626 { 2627 int i; 2628 2629 for (i = 0; i < sband->n_bitrates; i++) 2630 if (rate_supported(sta, sband->band, i)) 2631 return i; 2632 2633 /* warn when we cannot find a rate. */ 2634 WARN_ON(1); 2635 2636 return 0; 2637 } 2638 2639 static inline 2640 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 2641 struct ieee80211_sta *sta) 2642 { 2643 unsigned int i; 2644 2645 for (i = 0; i < sband->n_bitrates; i++) 2646 if (rate_supported(sta, sband->band, i)) 2647 return true; 2648 return false; 2649 } 2650 2651 int ieee80211_rate_control_register(struct rate_control_ops *ops); 2652 void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 2653 2654 static inline bool 2655 conf_is_ht20(struct ieee80211_conf *conf) 2656 { 2657 return conf->channel_type == NL80211_CHAN_HT20; 2658 } 2659 2660 static inline bool 2661 conf_is_ht40_minus(struct ieee80211_conf *conf) 2662 { 2663 return conf->channel_type == NL80211_CHAN_HT40MINUS; 2664 } 2665 2666 static inline bool 2667 conf_is_ht40_plus(struct ieee80211_conf *conf) 2668 { 2669 return conf->channel_type == NL80211_CHAN_HT40PLUS; 2670 } 2671 2672 static inline bool 2673 conf_is_ht40(struct ieee80211_conf *conf) 2674 { 2675 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 2676 } 2677 2678 static inline bool 2679 conf_is_ht(struct ieee80211_conf *conf) 2680 { 2681 return conf->channel_type != NL80211_CHAN_NO_HT; 2682 } 2683 2684 #endif /* MAC80211_H */ 2685