mac80211.h revision 4049e09acdf4ffd270cb8fbf1cf5b39c3d02357c
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/device.h> 20#include <linux/ieee80211.h> 21#include <net/cfg80211.h> 22#include <asm/unaligned.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 */ 95enum ieee80211_max_queues { 96 IEEE80211_MAX_QUEUES = 4, 97}; 98 99/** 100 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 101 * @IEEE80211_AC_VO: voice 102 * @IEEE80211_AC_VI: video 103 * @IEEE80211_AC_BE: best effort 104 * @IEEE80211_AC_BK: background 105 */ 106enum ieee80211_ac_numbers { 107 IEEE80211_AC_VO = 0, 108 IEEE80211_AC_VI = 1, 109 IEEE80211_AC_BE = 2, 110 IEEE80211_AC_BK = 3, 111}; 112#define IEEE80211_NUM_ACS 4 113 114/** 115 * struct ieee80211_tx_queue_params - transmit queue configuration 116 * 117 * The information provided in this structure is required for QoS 118 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 119 * 120 * @aifs: arbitration interframe space [0..255] 121 * @cw_min: minimum contention window [a value of the form 122 * 2^n-1 in the range 1..32767] 123 * @cw_max: maximum contention window [like @cw_min] 124 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 125 * @uapsd: is U-APSD mode enabled for the queue 126 */ 127struct ieee80211_tx_queue_params { 128 u16 txop; 129 u16 cw_min; 130 u16 cw_max; 131 u8 aifs; 132 bool uapsd; 133}; 134 135struct ieee80211_low_level_stats { 136 unsigned int dot11ACKFailureCount; 137 unsigned int dot11RTSFailureCount; 138 unsigned int dot11FCSErrorCount; 139 unsigned int dot11RTSSuccessCount; 140}; 141 142/** 143 * enum ieee80211_bss_change - BSS change notification flags 144 * 145 * These flags are used with the bss_info_changed() callback 146 * to indicate which BSS parameter changed. 147 * 148 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 149 * also implies a change in the AID. 150 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 151 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 152 * @BSS_CHANGED_ERP_SLOT: slot timing changed 153 * @BSS_CHANGED_HT: 802.11n parameters changed 154 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 155 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 156 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 157 * reason (IBSS and managed mode) 158 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 159 * new beacon (beaconing modes) 160 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 161 * enabled/disabled (beaconing modes) 162 * @BSS_CHANGED_CQM: Connection quality monitor config changed 163 * @BSS_CHANGED_IBSS: IBSS join status changed 164 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 165 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 166 * that it is only ever disabled for station mode. 167 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 168 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 169 */ 170enum ieee80211_bss_change { 171 BSS_CHANGED_ASSOC = 1<<0, 172 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 173 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 174 BSS_CHANGED_ERP_SLOT = 1<<3, 175 BSS_CHANGED_HT = 1<<4, 176 BSS_CHANGED_BASIC_RATES = 1<<5, 177 BSS_CHANGED_BEACON_INT = 1<<6, 178 BSS_CHANGED_BSSID = 1<<7, 179 BSS_CHANGED_BEACON = 1<<8, 180 BSS_CHANGED_BEACON_ENABLED = 1<<9, 181 BSS_CHANGED_CQM = 1<<10, 182 BSS_CHANGED_IBSS = 1<<11, 183 BSS_CHANGED_ARP_FILTER = 1<<12, 184 BSS_CHANGED_QOS = 1<<13, 185 BSS_CHANGED_IDLE = 1<<14, 186 BSS_CHANGED_SSID = 1<<15, 187 188 /* when adding here, make sure to change ieee80211_reconfig */ 189}; 190 191/* 192 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 193 * of addresses for an interface increase beyond this value, hardware ARP 194 * filtering will be disabled. 195 */ 196#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 197 198/** 199 * enum ieee80211_rssi_event - RSSI threshold event 200 * An indicator for when RSSI goes below/above a certain threshold. 201 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 202 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 203 */ 204enum ieee80211_rssi_event { 205 RSSI_EVENT_HIGH, 206 RSSI_EVENT_LOW, 207}; 208 209/** 210 * struct ieee80211_bss_conf - holds the BSS's changing parameters 211 * 212 * This structure keeps information about a BSS (and an association 213 * to that BSS) that can change during the lifetime of the BSS. 214 * 215 * @assoc: association status 216 * @ibss_joined: indicates whether this station is part of an IBSS 217 * or not 218 * @aid: association ID number, valid only when @assoc is true 219 * @use_cts_prot: use CTS protection 220 * @use_short_preamble: use 802.11b short preamble; 221 * if the hardware cannot handle this it must set the 222 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 223 * @use_short_slot: use short slot time (only relevant for ERP); 224 * if the hardware cannot handle this it must set the 225 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 226 * @dtim_period: num of beacons before the next DTIM, for beaconing, 227 * valid in station mode only while @assoc is true and if also 228 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 229 * @ps_dtim_period) 230 * @timestamp: beacon timestamp 231 * @beacon_int: beacon interval 232 * @assoc_capability: capabilities taken from assoc resp 233 * @basic_rates: bitmap of basic rates, each bit stands for an 234 * index into the rate table configured by the driver in 235 * the current band. 236 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 237 * @bssid: The BSSID for this BSS 238 * @enable_beacon: whether beaconing should be enabled or not 239 * @channel_type: Channel type for this BSS -- the hardware might be 240 * configured for HT40+ while this BSS only uses no-HT, for 241 * example. 242 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). 243 * This field is only valid when the channel type is one of the HT types. 244 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 245 * implies disabled 246 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 247 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 248 * may filter ARP queries targeted for other addresses than listed here. 249 * The driver must allow ARP queries targeted for all address listed here 250 * to pass through. An empty list implies no ARP queries need to pass. 251 * @arp_addr_cnt: Number of addresses currently on the list. 252 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 253 * filter ARP queries based on the @arp_addr_list, if disabled, the 254 * hardware must not perform any ARP filtering. Note, that the filter will 255 * be enabled also in promiscuous mode. 256 * @qos: This is a QoS-enabled BSS. 257 * @idle: This interface is idle. There's also a global idle flag in the 258 * hardware config which may be more appropriate depending on what 259 * your driver/device needs to do. 260 * @ssid: The SSID of the current vif. Only valid in AP-mode. 261 * @ssid_len: Length of SSID given in @ssid. 262 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 263 */ 264struct ieee80211_bss_conf { 265 const u8 *bssid; 266 /* association related data */ 267 bool assoc, ibss_joined; 268 u16 aid; 269 /* erp related data */ 270 bool use_cts_prot; 271 bool use_short_preamble; 272 bool use_short_slot; 273 bool enable_beacon; 274 u8 dtim_period; 275 u16 beacon_int; 276 u16 assoc_capability; 277 u64 timestamp; 278 u32 basic_rates; 279 int mcast_rate[IEEE80211_NUM_BANDS]; 280 u16 ht_operation_mode; 281 s32 cqm_rssi_thold; 282 u32 cqm_rssi_hyst; 283 enum nl80211_channel_type channel_type; 284 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 285 u8 arp_addr_cnt; 286 bool arp_filter_enabled; 287 bool qos; 288 bool idle; 289 u8 ssid[IEEE80211_MAX_SSID_LEN]; 290 size_t ssid_len; 291 bool hidden_ssid; 292}; 293 294/** 295 * enum mac80211_tx_control_flags - flags to describe transmission information/status 296 * 297 * These flags are used with the @flags member of &ieee80211_tx_info. 298 * 299 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 300 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 301 * number to this frame, taking care of not overwriting the fragment 302 * number and increasing the sequence number only when the 303 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 304 * assign sequence numbers to QoS-data frames but cannot do so correctly 305 * for non-QoS-data and management frames because beacons need them from 306 * that counter as well and mac80211 cannot guarantee proper sequencing. 307 * If this flag is set, the driver should instruct the hardware to 308 * assign a sequence number to the frame or assign one itself. Cf. IEEE 309 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 310 * beacons and always be clear for frames without a sequence number field. 311 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 312 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 313 * station 314 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 315 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 316 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 317 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 318 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 319 * because the destination STA was in powersave mode. Note that to 320 * avoid race conditions, the filter must be set by the hardware or 321 * firmware upon receiving a frame that indicates that the station 322 * went to sleep (must be done on device to filter frames already on 323 * the queue) and may only be unset after mac80211 gives the OK for 324 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 325 * since only then is it guaranteed that no more frames are in the 326 * hardware queue. 327 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 328 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 329 * is for the whole aggregation. 330 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 331 * so consider using block ack request (BAR). 332 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 333 * set by rate control algorithms to indicate probe rate, will 334 * be cleared for fragmented frames (except on the last fragment) 335 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 336 * used to indicate that a pending frame requires TX processing before 337 * it can be sent out. 338 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 339 * used to indicate that a frame was already retried due to PS 340 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 341 * used to indicate frame should not be encrypted 342 * @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?) 343 * This frame is a response to a PS-poll frame and should be sent 344 * although the station is in powersave mode. 345 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 346 * transmit function after the current frame, this can be used 347 * by drivers to kick the DMA queue only if unset or when the 348 * queue gets full. 349 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 350 * after TX status because the destination was asleep, it must not 351 * be modified again (no seqno assignment, crypto, etc.) 352 * @IEEE80211_TX_INTFL_HAS_RADIOTAP: This frame was injected and still 353 * has a radiotap header at skb->data. 354 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 355 * MLME command (internal to mac80211 to figure out whether to send TX 356 * status to user space) 357 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 358 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 359 * frame and selects the maximum number of streams that it can use. 360 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 361 * the off-channel channel when a remain-on-channel offload is done 362 * in hardware -- normal packets still flow and are expected to be 363 * handled properly by the device. 364 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 365 * testing. It will be sent out with incorrect Michael MIC key to allow 366 * TKIP countermeasures to be tested. 367 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 368 * This flag is actually used for management frame especially for P2P 369 * frames not being sent at CCK rate in 2GHz band. 370 * 371 * Note: If you have to add new flags to the enumeration, then don't 372 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 373 */ 374enum mac80211_tx_control_flags { 375 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 376 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 377 IEEE80211_TX_CTL_NO_ACK = BIT(2), 378 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 379 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 380 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 381 IEEE80211_TX_CTL_AMPDU = BIT(6), 382 IEEE80211_TX_CTL_INJECTED = BIT(7), 383 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 384 IEEE80211_TX_STAT_ACK = BIT(9), 385 IEEE80211_TX_STAT_AMPDU = BIT(10), 386 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 387 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 388 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 389 IEEE80211_TX_INTFL_RETRIED = BIT(15), 390 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 391 IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17), 392 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 393 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 394 IEEE80211_TX_INTFL_HAS_RADIOTAP = BIT(20), 395 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 396 IEEE80211_TX_CTL_LDPC = BIT(22), 397 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 398 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 399 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 400 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 401}; 402 403#define IEEE80211_TX_CTL_STBC_SHIFT 23 404 405/* 406 * This definition is used as a mask to clear all temporary flags, which are 407 * set by the tx handlers for each transmission attempt by the mac80211 stack. 408 */ 409#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 410 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 411 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 412 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 413 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 414 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_PSPOLL_RESPONSE | \ 415 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 416 IEEE80211_TX_CTL_STBC) 417 418/** 419 * enum mac80211_rate_control_flags - per-rate flags set by the 420 * Rate Control algorithm. 421 * 422 * These flags are set by the Rate control algorithm for each rate during tx, 423 * in the @flags member of struct ieee80211_tx_rate. 424 * 425 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 426 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 427 * This is set if the current BSS requires ERP protection. 428 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 429 * @IEEE80211_TX_RC_MCS: HT rate. 430 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 431 * Greenfield mode. 432 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 433 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 434 * adjacent 20 MHz channels, if the current channel type is 435 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 436 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 437 */ 438enum mac80211_rate_control_flags { 439 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 440 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 441 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 442 443 /* rate index is an MCS rate number instead of an index */ 444 IEEE80211_TX_RC_MCS = BIT(3), 445 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 446 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 447 IEEE80211_TX_RC_DUP_DATA = BIT(6), 448 IEEE80211_TX_RC_SHORT_GI = BIT(7), 449}; 450 451 452/* there are 40 bytes if you don't need the rateset to be kept */ 453#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 454 455/* if you do need the rateset, then you have less space */ 456#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 457 458/* maximum number of rate stages */ 459#define IEEE80211_TX_MAX_RATES 5 460 461/** 462 * struct ieee80211_tx_rate - rate selection/status 463 * 464 * @idx: rate index to attempt to send with 465 * @flags: rate control flags (&enum mac80211_rate_control_flags) 466 * @count: number of tries in this rate before going to the next rate 467 * 468 * A value of -1 for @idx indicates an invalid rate and, if used 469 * in an array of retry rates, that no more rates should be tried. 470 * 471 * When used for transmit status reporting, the driver should 472 * always report the rate along with the flags it used. 473 * 474 * &struct ieee80211_tx_info contains an array of these structs 475 * in the control information, and it will be filled by the rate 476 * control algorithm according to what should be sent. For example, 477 * if this array contains, in the format { <idx>, <count> } the 478 * information 479 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 480 * then this means that the frame should be transmitted 481 * up to twice at rate 3, up to twice at rate 2, and up to four 482 * times at rate 1 if it doesn't get acknowledged. Say it gets 483 * acknowledged by the peer after the fifth attempt, the status 484 * information should then contain 485 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 486 * since it was transmitted twice at rate 3, twice at rate 2 487 * and once at rate 1 after which we received an acknowledgement. 488 */ 489struct ieee80211_tx_rate { 490 s8 idx; 491 u8 count; 492 u8 flags; 493} __packed; 494 495/** 496 * struct ieee80211_tx_info - skb transmit information 497 * 498 * This structure is placed in skb->cb for three uses: 499 * (1) mac80211 TX control - mac80211 tells the driver what to do 500 * (2) driver internal use (if applicable) 501 * (3) TX status information - driver tells mac80211 what happened 502 * 503 * The TX control's sta pointer is only valid during the ->tx call, 504 * it may be NULL. 505 * 506 * @flags: transmit info flags, defined above 507 * @band: the band to transmit on (use for checking for races) 508 * @antenna_sel_tx: antenna to use, 0 for automatic diversity 509 * @pad: padding, ignore 510 * @control: union for control data 511 * @status: union for status data 512 * @driver_data: array of driver_data pointers 513 * @ampdu_ack_len: number of acked aggregated frames. 514 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 515 * @ampdu_len: number of aggregated frames. 516 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 517 * @ack_signal: signal strength of the ACK frame 518 */ 519struct ieee80211_tx_info { 520 /* common information */ 521 u32 flags; 522 u8 band; 523 524 u8 antenna_sel_tx; 525 526 /* 2 byte hole */ 527 u8 pad[2]; 528 529 union { 530 struct { 531 union { 532 /* rate control */ 533 struct { 534 struct ieee80211_tx_rate rates[ 535 IEEE80211_TX_MAX_RATES]; 536 s8 rts_cts_rate_idx; 537 }; 538 /* only needed before rate control */ 539 unsigned long jiffies; 540 }; 541 /* NB: vif can be NULL for injected frames */ 542 struct ieee80211_vif *vif; 543 struct ieee80211_key_conf *hw_key; 544 struct ieee80211_sta *sta; 545 } control; 546 struct { 547 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 548 u8 ampdu_ack_len; 549 int ack_signal; 550 u8 ampdu_len; 551 /* 15 bytes free */ 552 } status; 553 struct { 554 struct ieee80211_tx_rate driver_rates[ 555 IEEE80211_TX_MAX_RATES]; 556 void *rate_driver_data[ 557 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 558 }; 559 void *driver_data[ 560 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 561 }; 562}; 563 564/** 565 * struct ieee80211_sched_scan_ies - scheduled scan IEs 566 * 567 * This structure is used to pass the appropriate IEs to be used in scheduled 568 * scans for all bands. It contains both the IEs passed from the userspace 569 * and the ones generated by mac80211. 570 * 571 * @ie: array with the IEs for each supported band 572 * @len: array with the total length of the IEs for each band 573 */ 574struct ieee80211_sched_scan_ies { 575 u8 *ie[IEEE80211_NUM_BANDS]; 576 size_t len[IEEE80211_NUM_BANDS]; 577}; 578 579static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 580{ 581 return (struct ieee80211_tx_info *)skb->cb; 582} 583 584static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 585{ 586 return (struct ieee80211_rx_status *)skb->cb; 587} 588 589/** 590 * ieee80211_tx_info_clear_status - clear TX status 591 * 592 * @info: The &struct ieee80211_tx_info to be cleared. 593 * 594 * When the driver passes an skb back to mac80211, it must report 595 * a number of things in TX status. This function clears everything 596 * in the TX status but the rate control information (it does clear 597 * the count since you need to fill that in anyway). 598 * 599 * NOTE: You can only use this function if you do NOT use 600 * info->driver_data! Use info->rate_driver_data 601 * instead if you need only the less space that allows. 602 */ 603static inline void 604ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 605{ 606 int i; 607 608 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 609 offsetof(struct ieee80211_tx_info, control.rates)); 610 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 611 offsetof(struct ieee80211_tx_info, driver_rates)); 612 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 613 /* clear the rate counts */ 614 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 615 info->status.rates[i].count = 0; 616 617 BUILD_BUG_ON( 618 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 619 memset(&info->status.ampdu_ack_len, 0, 620 sizeof(struct ieee80211_tx_info) - 621 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 622} 623 624 625/** 626 * enum mac80211_rx_flags - receive flags 627 * 628 * These flags are used with the @flag member of &struct ieee80211_rx_status. 629 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 630 * Use together with %RX_FLAG_MMIC_STRIPPED. 631 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 632 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 633 * verification has been done by the hardware. 634 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 635 * If this flag is set, the stack cannot do any replay detection 636 * hence the driver or hardware will have to do that. 637 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 638 * the frame. 639 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 640 * the frame. 641 * @RX_FLAG_MACTIME_MPDU: The timestamp passed in the RX status (@mactime 642 * field) is valid and contains the time the first symbol of the MPDU 643 * was received. This is useful in monitor mode and for proper IBSS 644 * merging. 645 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 646 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 647 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 648 * @RX_FLAG_SHORT_GI: Short guard interval was used 649 */ 650enum mac80211_rx_flags { 651 RX_FLAG_MMIC_ERROR = 1<<0, 652 RX_FLAG_DECRYPTED = 1<<1, 653 RX_FLAG_MMIC_STRIPPED = 1<<3, 654 RX_FLAG_IV_STRIPPED = 1<<4, 655 RX_FLAG_FAILED_FCS_CRC = 1<<5, 656 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 657 RX_FLAG_MACTIME_MPDU = 1<<7, 658 RX_FLAG_SHORTPRE = 1<<8, 659 RX_FLAG_HT = 1<<9, 660 RX_FLAG_40MHZ = 1<<10, 661 RX_FLAG_SHORT_GI = 1<<11, 662}; 663 664/** 665 * struct ieee80211_rx_status - receive status 666 * 667 * The low-level driver should provide this information (the subset 668 * supported by hardware) to the 802.11 code with each received 669 * frame, in the skb's control buffer (cb). 670 * 671 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 672 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 673 * @band: the active band when this frame was received 674 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 675 * @signal: signal strength when receiving this frame, either in dBm, in dB or 676 * unspecified depending on the hardware capabilities flags 677 * @IEEE80211_HW_SIGNAL_* 678 * @antenna: antenna used 679 * @rate_idx: index of data rate into band's supported rates or MCS index if 680 * HT rates are use (RX_FLAG_HT) 681 * @flag: %RX_FLAG_* 682 * @rx_flags: internal RX flags for mac80211 683 */ 684struct ieee80211_rx_status { 685 u64 mactime; 686 enum ieee80211_band band; 687 int freq; 688 int signal; 689 int antenna; 690 int rate_idx; 691 int flag; 692 unsigned int rx_flags; 693}; 694 695/** 696 * enum ieee80211_conf_flags - configuration flags 697 * 698 * Flags to define PHY configuration options 699 * 700 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 701 * to determine for example whether to calculate timestamps for packets 702 * or not, do not use instead of filter flags! 703 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 704 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 705 * meaning that the hardware still wakes up for beacons, is able to 706 * transmit frames and receive the possible acknowledgment frames. 707 * Not to be confused with hardware specific wakeup/sleep states, 708 * driver is responsible for that. See the section "Powersave support" 709 * for more. 710 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 711 * the driver should be prepared to handle configuration requests but 712 * may turn the device off as much as possible. Typically, this flag will 713 * be set when an interface is set UP but not associated or scanning, but 714 * it can also be unset in that case when monitor interfaces are active. 715 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 716 * operating channel. 717 */ 718enum ieee80211_conf_flags { 719 IEEE80211_CONF_MONITOR = (1<<0), 720 IEEE80211_CONF_PS = (1<<1), 721 IEEE80211_CONF_IDLE = (1<<2), 722 IEEE80211_CONF_OFFCHANNEL = (1<<3), 723}; 724 725 726/** 727 * enum ieee80211_conf_changed - denotes which configuration changed 728 * 729 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 730 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 731 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 732 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 733 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 734 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 735 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 736 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 737 */ 738enum ieee80211_conf_changed { 739 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 740 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 741 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 742 IEEE80211_CONF_CHANGE_PS = BIT(4), 743 IEEE80211_CONF_CHANGE_POWER = BIT(5), 744 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 745 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 746 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 747}; 748 749/** 750 * enum ieee80211_smps_mode - spatial multiplexing power save mode 751 * 752 * @IEEE80211_SMPS_AUTOMATIC: automatic 753 * @IEEE80211_SMPS_OFF: off 754 * @IEEE80211_SMPS_STATIC: static 755 * @IEEE80211_SMPS_DYNAMIC: dynamic 756 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 757 */ 758enum ieee80211_smps_mode { 759 IEEE80211_SMPS_AUTOMATIC, 760 IEEE80211_SMPS_OFF, 761 IEEE80211_SMPS_STATIC, 762 IEEE80211_SMPS_DYNAMIC, 763 764 /* keep last */ 765 IEEE80211_SMPS_NUM_MODES, 766}; 767 768/** 769 * struct ieee80211_conf - configuration of the device 770 * 771 * This struct indicates how the driver shall configure the hardware. 772 * 773 * @flags: configuration flags defined above 774 * 775 * @listen_interval: listen interval in units of beacon interval 776 * @max_sleep_period: the maximum number of beacon intervals to sleep for 777 * before checking the beacon for a TIM bit (managed mode only); this 778 * value will be only achievable between DTIM frames, the hardware 779 * needs to check for the multicast traffic bit in DTIM beacons. 780 * This variable is valid only when the CONF_PS flag is set. 781 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 782 * in power saving. Power saving will not be enabled until a beacon 783 * has been received and the DTIM period is known. 784 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 785 * powersave documentation below. This variable is valid only when 786 * the CONF_PS flag is set. 787 * 788 * @power_level: requested transmit power (in dBm) 789 * 790 * @channel: the channel to tune to 791 * @channel_type: the channel (HT) type 792 * 793 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 794 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 795 * but actually means the number of transmissions not the number of retries 796 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 797 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 798 * number of transmissions not the number of retries 799 * 800 * @smps_mode: spatial multiplexing powersave mode; note that 801 * %IEEE80211_SMPS_STATIC is used when the device is not 802 * configured for an HT channel 803 */ 804struct ieee80211_conf { 805 u32 flags; 806 int power_level, dynamic_ps_timeout; 807 int max_sleep_period; 808 809 u16 listen_interval; 810 u8 ps_dtim_period; 811 812 u8 long_frame_max_tx_count, short_frame_max_tx_count; 813 814 struct ieee80211_channel *channel; 815 enum nl80211_channel_type channel_type; 816 enum ieee80211_smps_mode smps_mode; 817}; 818 819/** 820 * struct ieee80211_channel_switch - holds the channel switch data 821 * 822 * The information provided in this structure is required for channel switch 823 * operation. 824 * 825 * @timestamp: value in microseconds of the 64-bit Time Synchronization 826 * Function (TSF) timer when the frame containing the channel switch 827 * announcement was received. This is simply the rx.mactime parameter 828 * the driver passed into mac80211. 829 * @block_tx: Indicates whether transmission must be blocked before the 830 * scheduled channel switch, as indicated by the AP. 831 * @channel: the new channel to switch to 832 * @count: the number of TBTT's until the channel switch event 833 */ 834struct ieee80211_channel_switch { 835 u64 timestamp; 836 bool block_tx; 837 struct ieee80211_channel *channel; 838 u8 count; 839}; 840 841/** 842 * struct ieee80211_vif - per-interface data 843 * 844 * Data in this structure is continually present for driver 845 * use during the life of a virtual interface. 846 * 847 * @type: type of this virtual interface 848 * @bss_conf: BSS configuration for this interface, either our own 849 * or the BSS we're associated to 850 * @addr: address of this interface 851 * @p2p: indicates whether this AP or STA interface is a p2p 852 * interface, i.e. a GO or p2p-sta respectively 853 * @drv_priv: data area for driver use, will always be aligned to 854 * sizeof(void *). 855 */ 856struct ieee80211_vif { 857 enum nl80211_iftype type; 858 struct ieee80211_bss_conf bss_conf; 859 u8 addr[ETH_ALEN]; 860 bool p2p; 861 /* must be last */ 862 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 863}; 864 865static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 866{ 867#ifdef CONFIG_MAC80211_MESH 868 return vif->type == NL80211_IFTYPE_MESH_POINT; 869#endif 870 return false; 871} 872 873/** 874 * enum ieee80211_key_flags - key flags 875 * 876 * These flags are used for communication about keys between the driver 877 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 878 * 879 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 880 * that the STA this key will be used with could be using QoS. 881 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 882 * driver to indicate that it requires IV generation for this 883 * particular key. 884 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 885 * the driver for a TKIP key if it requires Michael MIC 886 * generation in software. 887 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 888 * that the key is pairwise rather then a shared key. 889 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 890 * CCMP key if it requires CCMP encryption of management frames (MFP) to 891 * be done in software. 892 */ 893enum ieee80211_key_flags { 894 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 895 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 896 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 897 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 898 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 899}; 900 901/** 902 * struct ieee80211_key_conf - key information 903 * 904 * This key information is given by mac80211 to the driver by 905 * the set_key() callback in &struct ieee80211_ops. 906 * 907 * @hw_key_idx: To be set by the driver, this is the key index the driver 908 * wants to be given when a frame is transmitted and needs to be 909 * encrypted in hardware. 910 * @cipher: The key's cipher suite selector. 911 * @flags: key flags, see &enum ieee80211_key_flags. 912 * @keyidx: the key index (0-3) 913 * @keylen: key material length 914 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 915 * data block: 916 * - Temporal Encryption Key (128 bits) 917 * - Temporal Authenticator Tx MIC Key (64 bits) 918 * - Temporal Authenticator Rx MIC Key (64 bits) 919 * @icv_len: The ICV length for this key type 920 * @iv_len: The IV length for this key type 921 */ 922struct ieee80211_key_conf { 923 u32 cipher; 924 u8 icv_len; 925 u8 iv_len; 926 u8 hw_key_idx; 927 u8 flags; 928 s8 keyidx; 929 u8 keylen; 930 u8 key[0]; 931}; 932 933/** 934 * enum set_key_cmd - key command 935 * 936 * Used with the set_key() callback in &struct ieee80211_ops, this 937 * indicates whether a key is being removed or added. 938 * 939 * @SET_KEY: a key is set 940 * @DISABLE_KEY: a key must be disabled 941 */ 942enum set_key_cmd { 943 SET_KEY, DISABLE_KEY, 944}; 945 946/** 947 * struct ieee80211_sta - station table entry 948 * 949 * A station table entry represents a station we are possibly 950 * communicating with. Since stations are RCU-managed in 951 * mac80211, any ieee80211_sta pointer you get access to must 952 * either be protected by rcu_read_lock() explicitly or implicitly, 953 * or you must take good care to not use such a pointer after a 954 * call to your sta_remove callback that removed it. 955 * 956 * @addr: MAC address 957 * @aid: AID we assigned to the station if we're an AP 958 * @supp_rates: Bitmap of supported rates (per band) 959 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 960 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 961 * @drv_priv: data area for driver use, will always be aligned to 962 * sizeof(void *), size is determined in hw information. 963 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 964 * if wme is supported. 965 * @max_sp: max Service Period. Only valid if wme is supported. 966 */ 967struct ieee80211_sta { 968 u32 supp_rates[IEEE80211_NUM_BANDS]; 969 u8 addr[ETH_ALEN]; 970 u16 aid; 971 struct ieee80211_sta_ht_cap ht_cap; 972 bool wme; 973 u8 uapsd_queues; 974 u8 max_sp; 975 976 /* must be last */ 977 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 978}; 979 980/** 981 * enum sta_notify_cmd - sta notify command 982 * 983 * Used with the sta_notify() callback in &struct ieee80211_ops, this 984 * indicates if an associated station made a power state transition. 985 * 986 * @STA_NOTIFY_SLEEP: a station is now sleeping 987 * @STA_NOTIFY_AWAKE: a sleeping station woke up 988 */ 989enum sta_notify_cmd { 990 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 991}; 992 993/** 994 * enum ieee80211_hw_flags - hardware flags 995 * 996 * These flags are used to indicate hardware capabilities to 997 * the stack. Generally, flags here should have their meaning 998 * done in a way that the simplest hardware doesn't need setting 999 * any particular flags. There are some exceptions to this rule, 1000 * however, so you are advised to review these flags carefully. 1001 * 1002 * @IEEE80211_HW_HAS_RATE_CONTROL: 1003 * The hardware or firmware includes rate control, and cannot be 1004 * controlled by the stack. As such, no rate control algorithm 1005 * should be instantiated, and the TX rate reported to userspace 1006 * will be taken from the TX status instead of the rate control 1007 * algorithm. 1008 * Note that this requires that the driver implement a number of 1009 * callbacks so it has the correct information, it needs to have 1010 * the @set_rts_threshold callback and must look at the BSS config 1011 * @use_cts_prot for G/N protection, @use_short_slot for slot 1012 * timing in 2.4 GHz and @use_short_preamble for preambles for 1013 * CCK frames. 1014 * 1015 * @IEEE80211_HW_RX_INCLUDES_FCS: 1016 * Indicates that received frames passed to the stack include 1017 * the FCS at the end. 1018 * 1019 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1020 * Some wireless LAN chipsets buffer broadcast/multicast frames 1021 * for power saving stations in the hardware/firmware and others 1022 * rely on the host system for such buffering. This option is used 1023 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1024 * multicast frames when there are power saving stations so that 1025 * the driver can fetch them with ieee80211_get_buffered_bc(). 1026 * 1027 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1028 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1029 * 1030 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1031 * Hardware is not capable of receiving frames with short preamble on 1032 * the 2.4 GHz band. 1033 * 1034 * @IEEE80211_HW_SIGNAL_UNSPEC: 1035 * Hardware can provide signal values but we don't know its units. We 1036 * expect values between 0 and @max_signal. 1037 * If possible please provide dB or dBm instead. 1038 * 1039 * @IEEE80211_HW_SIGNAL_DBM: 1040 * Hardware gives signal values in dBm, decibel difference from 1041 * one milliwatt. This is the preferred method since it is standardized 1042 * between different devices. @max_signal does not need to be set. 1043 * 1044 * @IEEE80211_HW_SPECTRUM_MGMT: 1045 * Hardware supports spectrum management defined in 802.11h 1046 * Measurement, Channel Switch, Quieting, TPC 1047 * 1048 * @IEEE80211_HW_AMPDU_AGGREGATION: 1049 * Hardware supports 11n A-MPDU aggregation. 1050 * 1051 * @IEEE80211_HW_SUPPORTS_PS: 1052 * Hardware has power save support (i.e. can go to sleep). 1053 * 1054 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1055 * Hardware requires nullfunc frame handling in stack, implies 1056 * stack support for dynamic PS. 1057 * 1058 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1059 * Hardware has support for dynamic PS. 1060 * 1061 * @IEEE80211_HW_MFP_CAPABLE: 1062 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1063 * 1064 * @IEEE80211_HW_BEACON_FILTER: 1065 * Hardware supports dropping of irrelevant beacon frames to 1066 * avoid waking up cpu. 1067 * 1068 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1069 * Hardware supports static spatial multiplexing powersave, 1070 * ie. can turn off all but one chain even on HT connections 1071 * that should be using more chains. 1072 * 1073 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1074 * Hardware supports dynamic spatial multiplexing powersave, 1075 * ie. can turn off all but one chain and then wake the rest 1076 * up as required after, for example, rts/cts handshake. 1077 * 1078 * @IEEE80211_HW_SUPPORTS_UAPSD: 1079 * Hardware supports Unscheduled Automatic Power Save Delivery 1080 * (U-APSD) in managed mode. The mode is configured with 1081 * conf_tx() operation. 1082 * 1083 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1084 * Hardware can provide ack status reports of Tx frames to 1085 * the stack. 1086 * 1087 * @IEEE80211_HW_CONNECTION_MONITOR: 1088 * The hardware performs its own connection monitoring, including 1089 * periodic keep-alives to the AP and probing the AP on beacon loss. 1090 * When this flag is set, signaling beacon-loss will cause an immediate 1091 * change to disassociated state. 1092 * 1093 * @IEEE80211_HW_SUPPORTS_CQM_RSSI: 1094 * Hardware can do connection quality monitoring - i.e. it can monitor 1095 * connection quality related parameters, such as the RSSI level and 1096 * provide notifications if configured trigger levels are reached. 1097 * 1098 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1099 * This device needs to know the DTIM period for the BSS before 1100 * associating. 1101 * 1102 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1103 * per-station GTKs as used by IBSS RSN or during fast transition. If 1104 * the device doesn't support per-station GTKs, but can be asked not 1105 * to decrypt group addressed frames, then IBSS RSN support is still 1106 * possible but software crypto will be used. Advertise the wiphy flag 1107 * only in that case. 1108 * 1109 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1110 * autonomously manages the PS status of connected stations. When 1111 * this flag is set mac80211 will not trigger PS mode for connected 1112 * stations based on the PM bit of incoming frames. 1113 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1114 * the PS mode of connected stations. 1115 * 1116 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1117 * setup strictly in HW. mac80211 should not attempt to do this in 1118 * software. 1119 */ 1120enum ieee80211_hw_flags { 1121 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1122 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1123 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1124 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1125 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1126 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1127 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1128 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1129 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1130 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1131 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1132 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1133 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1134 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1135 IEEE80211_HW_BEACON_FILTER = 1<<14, 1136 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1137 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1138 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1139 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1140 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1141 IEEE80211_HW_SUPPORTS_CQM_RSSI = 1<<20, 1142 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1143 IEEE80211_HW_AP_LINK_PS = 1<<22, 1144 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1145}; 1146 1147/** 1148 * struct ieee80211_hw - hardware information and state 1149 * 1150 * This structure contains the configuration and hardware 1151 * information for an 802.11 PHY. 1152 * 1153 * @wiphy: This points to the &struct wiphy allocated for this 1154 * 802.11 PHY. You must fill in the @perm_addr and @dev 1155 * members of this structure using SET_IEEE80211_DEV() 1156 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1157 * bands (with channels, bitrates) are registered here. 1158 * 1159 * @conf: &struct ieee80211_conf, device configuration, don't use. 1160 * 1161 * @priv: pointer to private area that was allocated for driver use 1162 * along with this structure. 1163 * 1164 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1165 * 1166 * @extra_tx_headroom: headroom to reserve in each transmit skb 1167 * for use by the driver (e.g. for transmit headers.) 1168 * 1169 * @channel_change_time: time (in microseconds) it takes to change channels. 1170 * 1171 * @max_signal: Maximum value for signal (rssi) in RX information, used 1172 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1173 * 1174 * @max_listen_interval: max listen interval in units of beacon interval 1175 * that HW supports 1176 * 1177 * @queues: number of available hardware transmit queues for 1178 * data packets. WMM/QoS requires at least four, these 1179 * queues need to have configurable access parameters. 1180 * 1181 * @rate_control_algorithm: rate control algorithm for this hardware. 1182 * If unset (NULL), the default algorithm will be used. Must be 1183 * set before calling ieee80211_register_hw(). 1184 * 1185 * @vif_data_size: size (in bytes) of the drv_priv data area 1186 * within &struct ieee80211_vif. 1187 * @sta_data_size: size (in bytes) of the drv_priv data area 1188 * within &struct ieee80211_sta. 1189 * 1190 * @max_rates: maximum number of alternate rate retry stages the hw 1191 * can handle. 1192 * @max_report_rates: maximum number of alternate rate retry stages 1193 * the hw can report back. 1194 * @max_rate_tries: maximum number of tries for each stage 1195 * 1196 * @napi_weight: weight used for NAPI polling. You must specify an 1197 * appropriate value here if a napi_poll operation is provided 1198 * by your driver. 1199 * 1200 * @max_rx_aggregation_subframes: maximum buffer size (number of 1201 * sub-frames) to be used for A-MPDU block ack receiver 1202 * aggregation. 1203 * This is only relevant if the device has restrictions on the 1204 * number of subframes, if it relies on mac80211 to do reordering 1205 * it shouldn't be set. 1206 * 1207 * @max_tx_aggregation_subframes: maximum number of subframes in an 1208 * aggregate an HT driver will transmit, used by the peer as a 1209 * hint to size its reorder buffer. 1210 */ 1211struct ieee80211_hw { 1212 struct ieee80211_conf conf; 1213 struct wiphy *wiphy; 1214 const char *rate_control_algorithm; 1215 void *priv; 1216 u32 flags; 1217 unsigned int extra_tx_headroom; 1218 int channel_change_time; 1219 int vif_data_size; 1220 int sta_data_size; 1221 int napi_weight; 1222 u16 queues; 1223 u16 max_listen_interval; 1224 s8 max_signal; 1225 u8 max_rates; 1226 u8 max_report_rates; 1227 u8 max_rate_tries; 1228 u8 max_rx_aggregation_subframes; 1229 u8 max_tx_aggregation_subframes; 1230}; 1231 1232/** 1233 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1234 * 1235 * @wiphy: the &struct wiphy which we want to query 1236 * 1237 * mac80211 drivers can use this to get to their respective 1238 * &struct ieee80211_hw. Drivers wishing to get to their own private 1239 * structure can then access it via hw->priv. Note that mac802111 drivers should 1240 * not use wiphy_priv() to try to get their private driver structure as this 1241 * is already used internally by mac80211. 1242 */ 1243struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1244 1245/** 1246 * SET_IEEE80211_DEV - set device for 802.11 hardware 1247 * 1248 * @hw: the &struct ieee80211_hw to set the device for 1249 * @dev: the &struct device of this 802.11 device 1250 */ 1251static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1252{ 1253 set_wiphy_dev(hw->wiphy, dev); 1254} 1255 1256/** 1257 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1258 * 1259 * @hw: the &struct ieee80211_hw to set the MAC address for 1260 * @addr: the address to set 1261 */ 1262static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1263{ 1264 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1265} 1266 1267static inline struct ieee80211_rate * 1268ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1269 const struct ieee80211_tx_info *c) 1270{ 1271 if (WARN_ON(c->control.rates[0].idx < 0)) 1272 return NULL; 1273 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1274} 1275 1276static inline struct ieee80211_rate * 1277ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1278 const struct ieee80211_tx_info *c) 1279{ 1280 if (c->control.rts_cts_rate_idx < 0) 1281 return NULL; 1282 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1283} 1284 1285static inline struct ieee80211_rate * 1286ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1287 const struct ieee80211_tx_info *c, int idx) 1288{ 1289 if (c->control.rates[idx + 1].idx < 0) 1290 return NULL; 1291 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1292} 1293 1294/** 1295 * DOC: Hardware crypto acceleration 1296 * 1297 * mac80211 is capable of taking advantage of many hardware 1298 * acceleration designs for encryption and decryption operations. 1299 * 1300 * The set_key() callback in the &struct ieee80211_ops for a given 1301 * device is called to enable hardware acceleration of encryption and 1302 * decryption. The callback takes a @sta parameter that will be NULL 1303 * for default keys or keys used for transmission only, or point to 1304 * the station information for the peer for individual keys. 1305 * Multiple transmission keys with the same key index may be used when 1306 * VLANs are configured for an access point. 1307 * 1308 * When transmitting, the TX control data will use the @hw_key_idx 1309 * selected by the driver by modifying the &struct ieee80211_key_conf 1310 * pointed to by the @key parameter to the set_key() function. 1311 * 1312 * The set_key() call for the %SET_KEY command should return 0 if 1313 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1314 * added; if you return 0 then hw_key_idx must be assigned to the 1315 * hardware key index, you are free to use the full u8 range. 1316 * 1317 * When the cmd is %DISABLE_KEY then it must succeed. 1318 * 1319 * Note that it is permissible to not decrypt a frame even if a key 1320 * for it has been uploaded to hardware, the stack will not make any 1321 * decision based on whether a key has been uploaded or not but rather 1322 * based on the receive flags. 1323 * 1324 * The &struct ieee80211_key_conf structure pointed to by the @key 1325 * parameter is guaranteed to be valid until another call to set_key() 1326 * removes it, but it can only be used as a cookie to differentiate 1327 * keys. 1328 * 1329 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1330 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1331 * handler. 1332 * The update_tkip_key() call updates the driver with the new phase 1 key. 1333 * This happens every time the iv16 wraps around (every 65536 packets). The 1334 * set_key() call will happen only once for each key (unless the AP did 1335 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1336 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1337 * handler is software decryption with wrap around of iv16. 1338 */ 1339 1340/** 1341 * DOC: Powersave support 1342 * 1343 * mac80211 has support for various powersave implementations. 1344 * 1345 * First, it can support hardware that handles all powersaving by itself, 1346 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1347 * flag. In that case, it will be told about the desired powersave mode 1348 * with the %IEEE80211_CONF_PS flag depending on the association status. 1349 * The hardware must take care of sending nullfunc frames when necessary, 1350 * i.e. when entering and leaving powersave mode. The hardware is required 1351 * to look at the AID in beacons and signal to the AP that it woke up when 1352 * it finds traffic directed to it. 1353 * 1354 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1355 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1356 * with hardware wakeup and sleep states. Driver is responsible for waking 1357 * up the hardware before issuing commands to the hardware and putting it 1358 * back to sleep at appropriate times. 1359 * 1360 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1361 * buffered multicast/broadcast frames after the beacon. Also it must be 1362 * possible to send frames and receive the acknowledment frame. 1363 * 1364 * Other hardware designs cannot send nullfunc frames by themselves and also 1365 * need software support for parsing the TIM bitmap. This is also supported 1366 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1367 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1368 * required to pass up beacons. The hardware is still required to handle 1369 * waking up for multicast traffic; if it cannot the driver must handle that 1370 * as best as it can, mac80211 is too slow to do that. 1371 * 1372 * Dynamic powersave is an extension to normal powersave in which the 1373 * hardware stays awake for a user-specified period of time after sending a 1374 * frame so that reply frames need not be buffered and therefore delayed to 1375 * the next wakeup. It's compromise of getting good enough latency when 1376 * there's data traffic and still saving significantly power in idle 1377 * periods. 1378 * 1379 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1380 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1381 * flag and mac80211 will handle everything automatically. Additionally, 1382 * hardware having support for the dynamic PS feature may set the 1383 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1384 * dynamic PS mode itself. The driver needs to look at the 1385 * @dynamic_ps_timeout hardware configuration value and use it that value 1386 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1387 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1388 * enabled whenever user has enabled powersave. 1389 * 1390 * Some hardware need to toggle a single shared antenna between WLAN and 1391 * Bluetooth to facilitate co-existence. These types of hardware set 1392 * limitations on the use of host controlled dynamic powersave whenever there 1393 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1394 * driver may request temporarily going into full power save, in order to 1395 * enable toggling the antenna between BT and WLAN. If the driver requests 1396 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1397 * temporarily set to zero until the driver re-enables dynamic powersave. 1398 * 1399 * Driver informs U-APSD client support by enabling 1400 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1401 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1402 * Nullfunc frames and stay awake until the service period has ended. To 1403 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1404 * from that AC are transmitted with powersave enabled. 1405 * 1406 * Note: U-APSD client mode is not yet supported with 1407 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1408 */ 1409 1410/** 1411 * DOC: Beacon filter support 1412 * 1413 * Some hardware have beacon filter support to reduce host cpu wakeups 1414 * which will reduce system power consumption. It usuallly works so that 1415 * the firmware creates a checksum of the beacon but omits all constantly 1416 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1417 * beacon is forwarded to the host, otherwise it will be just dropped. That 1418 * way the host will only receive beacons where some relevant information 1419 * (for example ERP protection or WMM settings) have changed. 1420 * 1421 * Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER 1422 * hardware capability. The driver needs to enable beacon filter support 1423 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1424 * power save is enabled, the stack will not check for beacon loss and the 1425 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1426 * 1427 * The time (or number of beacons missed) until the firmware notifies the 1428 * driver of a beacon loss event (which in turn causes the driver to call 1429 * ieee80211_beacon_loss()) should be configurable and will be controlled 1430 * by mac80211 and the roaming algorithm in the future. 1431 * 1432 * Since there may be constantly changing information elements that nothing 1433 * in the software stack cares about, we will, in the future, have mac80211 1434 * tell the driver which information elements are interesting in the sense 1435 * that we want to see changes in them. This will include 1436 * - a list of information element IDs 1437 * - a list of OUIs for the vendor information element 1438 * 1439 * Ideally, the hardware would filter out any beacons without changes in the 1440 * requested elements, but if it cannot support that it may, at the expense 1441 * of some efficiency, filter out only a subset. For example, if the device 1442 * doesn't support checking for OUIs it should pass up all changes in all 1443 * vendor information elements. 1444 * 1445 * Note that change, for the sake of simplification, also includes information 1446 * elements appearing or disappearing from the beacon. 1447 * 1448 * Some hardware supports an "ignore list" instead, just make sure nothing 1449 * that was requested is on the ignore list, and include commonly changing 1450 * information element IDs in the ignore list, for example 11 (BSS load) and 1451 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1452 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1453 * it could also include some currently unused IDs. 1454 * 1455 * 1456 * In addition to these capabilities, hardware should support notifying the 1457 * host of changes in the beacon RSSI. This is relevant to implement roaming 1458 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1459 * the received data packets). This can consist in notifying the host when 1460 * the RSSI changes significantly or when it drops below or rises above 1461 * configurable thresholds. In the future these thresholds will also be 1462 * configured by mac80211 (which gets them from userspace) to implement 1463 * them as the roaming algorithm requires. 1464 * 1465 * If the hardware cannot implement this, the driver should ask it to 1466 * periodically pass beacon frames to the host so that software can do the 1467 * signal strength threshold checking. 1468 */ 1469 1470/** 1471 * DOC: Spatial multiplexing power save 1472 * 1473 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1474 * power in an 802.11n implementation. For details on the mechanism 1475 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1476 * "11.2.3 SM power save". 1477 * 1478 * The mac80211 implementation is capable of sending action frames 1479 * to update the AP about the station's SMPS mode, and will instruct 1480 * the driver to enter the specific mode. It will also announce the 1481 * requested SMPS mode during the association handshake. Hardware 1482 * support for this feature is required, and can be indicated by 1483 * hardware flags. 1484 * 1485 * The default mode will be "automatic", which nl80211/cfg80211 1486 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1487 * turned off otherwise. 1488 * 1489 * To support this feature, the driver must set the appropriate 1490 * hardware support flags, and handle the SMPS flag to the config() 1491 * operation. It will then with this mechanism be instructed to 1492 * enter the requested SMPS mode while associated to an HT AP. 1493 */ 1494 1495/** 1496 * DOC: Frame filtering 1497 * 1498 * mac80211 requires to see many management frames for proper 1499 * operation, and users may want to see many more frames when 1500 * in monitor mode. However, for best CPU usage and power consumption, 1501 * having as few frames as possible percolate through the stack is 1502 * desirable. Hence, the hardware should filter as much as possible. 1503 * 1504 * To achieve this, mac80211 uses filter flags (see below) to tell 1505 * the driver's configure_filter() function which frames should be 1506 * passed to mac80211 and which should be filtered out. 1507 * 1508 * Before configure_filter() is invoked, the prepare_multicast() 1509 * callback is invoked with the parameters @mc_count and @mc_list 1510 * for the combined multicast address list of all virtual interfaces. 1511 * It's use is optional, and it returns a u64 that is passed to 1512 * configure_filter(). Additionally, configure_filter() has the 1513 * arguments @changed_flags telling which flags were changed and 1514 * @total_flags with the new flag states. 1515 * 1516 * If your device has no multicast address filters your driver will 1517 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1518 * parameter to see whether multicast frames should be accepted 1519 * or dropped. 1520 * 1521 * All unsupported flags in @total_flags must be cleared. 1522 * Hardware does not support a flag if it is incapable of _passing_ 1523 * the frame to the stack. Otherwise the driver must ignore 1524 * the flag, but not clear it. 1525 * You must _only_ clear the flag (announce no support for the 1526 * flag to mac80211) if you are not able to pass the packet type 1527 * to the stack (so the hardware always filters it). 1528 * So for example, you should clear @FIF_CONTROL, if your hardware 1529 * always filters control frames. If your hardware always passes 1530 * control frames to the kernel and is incapable of filtering them, 1531 * you do _not_ clear the @FIF_CONTROL flag. 1532 * This rule applies to all other FIF flags as well. 1533 */ 1534 1535/** 1536 * enum ieee80211_filter_flags - hardware filter flags 1537 * 1538 * These flags determine what the filter in hardware should be 1539 * programmed to let through and what should not be passed to the 1540 * stack. It is always safe to pass more frames than requested, 1541 * but this has negative impact on power consumption. 1542 * 1543 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1544 * think of the BSS as your network segment and then this corresponds 1545 * to the regular ethernet device promiscuous mode. 1546 * 1547 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1548 * by the user or if the hardware is not capable of filtering by 1549 * multicast address. 1550 * 1551 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1552 * %RX_FLAG_FAILED_FCS_CRC for them) 1553 * 1554 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1555 * the %RX_FLAG_FAILED_PLCP_CRC for them 1556 * 1557 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1558 * to the hardware that it should not filter beacons or probe responses 1559 * by BSSID. Filtering them can greatly reduce the amount of processing 1560 * mac80211 needs to do and the amount of CPU wakeups, so you should 1561 * honour this flag if possible. 1562 * 1563 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1564 * is not set then only those addressed to this station. 1565 * 1566 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1567 * 1568 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1569 * those addressed to this station. 1570 * 1571 * @FIF_PROBE_REQ: pass probe request frames 1572 */ 1573enum ieee80211_filter_flags { 1574 FIF_PROMISC_IN_BSS = 1<<0, 1575 FIF_ALLMULTI = 1<<1, 1576 FIF_FCSFAIL = 1<<2, 1577 FIF_PLCPFAIL = 1<<3, 1578 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1579 FIF_CONTROL = 1<<5, 1580 FIF_OTHER_BSS = 1<<6, 1581 FIF_PSPOLL = 1<<7, 1582 FIF_PROBE_REQ = 1<<8, 1583}; 1584 1585/** 1586 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1587 * 1588 * These flags are used with the ampdu_action() callback in 1589 * &struct ieee80211_ops to indicate which action is needed. 1590 * 1591 * Note that drivers MUST be able to deal with a TX aggregation 1592 * session being stopped even before they OK'ed starting it by 1593 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1594 * might receive the addBA frame and send a delBA right away! 1595 * 1596 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1597 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1598 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1599 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1600 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1601 */ 1602enum ieee80211_ampdu_mlme_action { 1603 IEEE80211_AMPDU_RX_START, 1604 IEEE80211_AMPDU_RX_STOP, 1605 IEEE80211_AMPDU_TX_START, 1606 IEEE80211_AMPDU_TX_STOP, 1607 IEEE80211_AMPDU_TX_OPERATIONAL, 1608}; 1609 1610/** 1611 * enum ieee80211_tx_sync_type - TX sync type 1612 * @IEEE80211_TX_SYNC_AUTH: sync TX for authentication 1613 * (and possibly also before direct probe) 1614 * @IEEE80211_TX_SYNC_ASSOC: sync TX for association 1615 * @IEEE80211_TX_SYNC_ACTION: sync TX for action frame 1616 * (not implemented yet) 1617 */ 1618enum ieee80211_tx_sync_type { 1619 IEEE80211_TX_SYNC_AUTH, 1620 IEEE80211_TX_SYNC_ASSOC, 1621 IEEE80211_TX_SYNC_ACTION, 1622}; 1623 1624/** 1625 * enum ieee80211_frame_release_type - frame release reason 1626 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 1627 */ 1628enum ieee80211_frame_release_type { 1629 IEEE80211_FRAME_RELEASE_PSPOLL, 1630}; 1631 1632/** 1633 * struct ieee80211_ops - callbacks from mac80211 to the driver 1634 * 1635 * This structure contains various callbacks that the driver may 1636 * handle or, in some cases, must handle, for example to configure 1637 * the hardware to a new channel or to transmit a frame. 1638 * 1639 * @tx: Handler that 802.11 module calls for each transmitted frame. 1640 * skb contains the buffer starting from the IEEE 802.11 header. 1641 * The low-level driver should send the frame out based on 1642 * configuration in the TX control data. This handler should, 1643 * preferably, never fail and stop queues appropriately, more 1644 * importantly, however, it must never fail for A-MPDU-queues. 1645 * This function should return NETDEV_TX_OK except in very 1646 * limited cases. 1647 * Must be implemented and atomic. 1648 * 1649 * @start: Called before the first netdevice attached to the hardware 1650 * is enabled. This should turn on the hardware and must turn on 1651 * frame reception (for possibly enabled monitor interfaces.) 1652 * Returns negative error codes, these may be seen in userspace, 1653 * or zero. 1654 * When the device is started it should not have a MAC address 1655 * to avoid acknowledging frames before a non-monitor device 1656 * is added. 1657 * Must be implemented and can sleep. 1658 * 1659 * @stop: Called after last netdevice attached to the hardware 1660 * is disabled. This should turn off the hardware (at least 1661 * it must turn off frame reception.) 1662 * May be called right after add_interface if that rejects 1663 * an interface. If you added any work onto the mac80211 workqueue 1664 * you should ensure to cancel it on this callback. 1665 * Must be implemented and can sleep. 1666 * 1667 * @suspend: Suspend the device; mac80211 itself will quiesce before and 1668 * stop transmitting and doing any other configuration, and then 1669 * ask the device to suspend. This is only invoked when WoWLAN is 1670 * configured, otherwise the device is deconfigured completely and 1671 * reconfigured at resume time. 1672 * The driver may also impose special conditions under which it 1673 * wants to use the "normal" suspend (deconfigure), say if it only 1674 * supports WoWLAN when the device is associated. In this case, it 1675 * must return 1 from this function. 1676 * 1677 * @resume: If WoWLAN was configured, this indicates that mac80211 is 1678 * now resuming its operation, after this the device must be fully 1679 * functional again. If this returns an error, the only way out is 1680 * to also unregister the device. If it returns 1, then mac80211 1681 * will also go through the regular complete restart on resume. 1682 * 1683 * @add_interface: Called when a netdevice attached to the hardware is 1684 * enabled. Because it is not called for monitor mode devices, @start 1685 * and @stop must be implemented. 1686 * The driver should perform any initialization it needs before 1687 * the device can be enabled. The initial configuration for the 1688 * interface is given in the conf parameter. 1689 * The callback may refuse to add an interface by returning a 1690 * negative error code (which will be seen in userspace.) 1691 * Must be implemented and can sleep. 1692 * 1693 * @change_interface: Called when a netdevice changes type. This callback 1694 * is optional, but only if it is supported can interface types be 1695 * switched while the interface is UP. The callback may sleep. 1696 * Note that while an interface is being switched, it will not be 1697 * found by the interface iteration callbacks. 1698 * 1699 * @remove_interface: Notifies a driver that an interface is going down. 1700 * The @stop callback is called after this if it is the last interface 1701 * and no monitor interfaces are present. 1702 * When all interfaces are removed, the MAC address in the hardware 1703 * must be cleared so the device no longer acknowledges packets, 1704 * the mac_addr member of the conf structure is, however, set to the 1705 * MAC address of the device going away. 1706 * Hence, this callback must be implemented. It can sleep. 1707 * 1708 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1709 * function to change hardware configuration, e.g., channel. 1710 * This function should never fail but returns a negative error code 1711 * if it does. The callback can sleep. 1712 * 1713 * @bss_info_changed: Handler for configuration requests related to BSS 1714 * parameters that may vary during BSS's lifespan, and may affect low 1715 * level driver (e.g. assoc/disassoc status, erp parameters). 1716 * This function should not be used if no BSS has been set, unless 1717 * for association indication. The @changed parameter indicates which 1718 * of the bss parameters has changed when a call is made. The callback 1719 * can sleep. 1720 * 1721 * @tx_sync: Called before a frame is sent to an AP/GO. In the GO case, the 1722 * driver should sync with the GO's powersaving so the device doesn't 1723 * transmit the frame while the GO is asleep. In the regular AP case 1724 * it may be used by drivers for devices implementing other restrictions 1725 * on talking to APs, e.g. due to regulatory enforcement or just HW 1726 * restrictions. 1727 * This function is called for every authentication, association and 1728 * action frame separately since applications might attempt to auth 1729 * with multiple APs before chosing one to associate to. If it returns 1730 * an error, the corresponding authentication, association or frame 1731 * transmission is aborted and reported as having failed. It is always 1732 * called after tuning to the correct channel. 1733 * The callback might be called multiple times before @finish_tx_sync 1734 * (but @finish_tx_sync will be called once for each) but in practice 1735 * this is unlikely to happen. It can also refuse in that case if the 1736 * driver cannot handle that situation. 1737 * This callback can sleep. 1738 * @finish_tx_sync: Called as a counterpart to @tx_sync, unless that returned 1739 * an error. This callback can sleep. 1740 * 1741 * @prepare_multicast: Prepare for multicast filter configuration. 1742 * This callback is optional, and its return value is passed 1743 * to configure_filter(). This callback must be atomic. 1744 * 1745 * @configure_filter: Configure the device's RX filter. 1746 * See the section "Frame filtering" for more information. 1747 * This callback must be implemented and can sleep. 1748 * 1749 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1750 * must be set or cleared for a given STA. Must be atomic. 1751 * 1752 * @set_key: See the section "Hardware crypto acceleration" 1753 * This callback is only called between add_interface and 1754 * remove_interface calls, i.e. while the given virtual interface 1755 * is enabled. 1756 * Returns a negative error code if the key can't be added. 1757 * The callback can sleep. 1758 * 1759 * @update_tkip_key: See the section "Hardware crypto acceleration" 1760 * This callback will be called in the context of Rx. Called for drivers 1761 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1762 * The callback must be atomic. 1763 * 1764 * @set_rekey_data: If the device supports GTK rekeying, for example while the 1765 * host is suspended, it can assign this callback to retrieve the data 1766 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 1767 * After rekeying was done it should (for example during resume) notify 1768 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 1769 * 1770 * @hw_scan: Ask the hardware to service the scan request, no need to start 1771 * the scan state machine in stack. The scan must honour the channel 1772 * configuration done by the regulatory agent in the wiphy's 1773 * registered bands. The hardware (or the driver) needs to make sure 1774 * that power save is disabled. 1775 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1776 * entire IEs after the SSID, so that drivers need not look at these 1777 * at all but just send them after the SSID -- mac80211 includes the 1778 * (extended) supported rates and HT information (where applicable). 1779 * When the scan finishes, ieee80211_scan_completed() must be called; 1780 * note that it also must be called when the scan cannot finish due to 1781 * any error unless this callback returned a negative error code. 1782 * The callback can sleep. 1783 * 1784 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 1785 * The driver should ask the hardware to cancel the scan (if possible), 1786 * but the scan will be completed only after the driver will call 1787 * ieee80211_scan_completed(). 1788 * This callback is needed for wowlan, to prevent enqueueing a new 1789 * scan_work after the low-level driver was already suspended. 1790 * The callback can sleep. 1791 * 1792 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 1793 * specific intervals. The driver must call the 1794 * ieee80211_sched_scan_results() function whenever it finds results. 1795 * This process will continue until sched_scan_stop is called. 1796 * 1797 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 1798 * 1799 * @sw_scan_start: Notifier function that is called just before a software scan 1800 * is started. Can be NULL, if the driver doesn't need this notification. 1801 * The callback can sleep. 1802 * 1803 * @sw_scan_complete: Notifier function that is called just after a 1804 * software scan finished. Can be NULL, if the driver doesn't need 1805 * this notification. 1806 * The callback can sleep. 1807 * 1808 * @get_stats: Return low-level statistics. 1809 * Returns zero if statistics are available. 1810 * The callback can sleep. 1811 * 1812 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1813 * callback should be provided to read the TKIP transmit IVs (both IV32 1814 * and IV16) for the given key from hardware. 1815 * The callback must be atomic. 1816 * 1817 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 1818 * if the device does fragmentation by itself; if this callback is 1819 * implemented then the stack will not do fragmentation. 1820 * The callback can sleep. 1821 * 1822 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1823 * The callback can sleep. 1824 * 1825 * @sta_add: Notifies low level driver about addition of an associated station, 1826 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1827 * 1828 * @sta_remove: Notifies low level driver about removal of an associated 1829 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1830 * 1831 * @sta_notify: Notifies low level driver about power state transition of an 1832 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 1833 * in AP mode, this callback will not be called when the flag 1834 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 1835 * 1836 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1837 * bursting) for a hardware TX queue. 1838 * Returns a negative error code on failure. 1839 * The callback can sleep. 1840 * 1841 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1842 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1843 * required function. 1844 * The callback can sleep. 1845 * 1846 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1847 * Currently, this is only used for IBSS mode debugging. Is not a 1848 * required function. 1849 * The callback can sleep. 1850 * 1851 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1852 * with other STAs in the IBSS. This is only used in IBSS mode. This 1853 * function is optional if the firmware/hardware takes full care of 1854 * TSF synchronization. 1855 * The callback can sleep. 1856 * 1857 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 1858 * This is needed only for IBSS mode and the result of this function is 1859 * used to determine whether to reply to Probe Requests. 1860 * Returns non-zero if this device sent the last beacon. 1861 * The callback can sleep. 1862 * 1863 * @ampdu_action: Perform a certain A-MPDU action 1864 * The RA/TID combination determines the destination and TID we want 1865 * the ampdu action to be performed for. The action is defined through 1866 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 1867 * is the first frame we expect to perform the action on. Notice 1868 * that TX/RX_STOP can pass NULL for this parameter. 1869 * The @buf_size parameter is only valid when the action is set to 1870 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 1871 * buffer size (number of subframes) for this session -- the driver 1872 * may neither send aggregates containing more subframes than this 1873 * nor send aggregates in a way that lost frames would exceed the 1874 * buffer size. If just limiting the aggregate size, this would be 1875 * possible with a buf_size of 8: 1876 * - TX: 1.....7 1877 * - RX: 2....7 (lost frame #1) 1878 * - TX: 8..1... 1879 * which is invalid since #1 was now re-transmitted well past the 1880 * buffer size of 8. Correct ways to retransmit #1 would be: 1881 * - TX: 1 or 18 or 81 1882 * Even "189" would be wrong since 1 could be lost again. 1883 * 1884 * Returns a negative error code on failure. 1885 * The callback can sleep. 1886 * 1887 * @get_survey: Return per-channel survey information 1888 * 1889 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 1890 * need to set wiphy->rfkill_poll to %true before registration, 1891 * and need to call wiphy_rfkill_set_hw_state() in the callback. 1892 * The callback can sleep. 1893 * 1894 * @set_coverage_class: Set slot time for given coverage class as specified 1895 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 1896 * accordingly. This callback is not required and may sleep. 1897 * 1898 * @testmode_cmd: Implement a cfg80211 test mode command. 1899 * The callback can sleep. 1900 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 1901 * 1902 * @flush: Flush all pending frames from the hardware queue, making sure 1903 * that the hardware queues are empty. If the parameter @drop is set 1904 * to %true, pending frames may be dropped. The callback can sleep. 1905 * 1906 * @channel_switch: Drivers that need (or want) to offload the channel 1907 * switch operation for CSAs received from the AP may implement this 1908 * callback. They must then call ieee80211_chswitch_done() to indicate 1909 * completion of the channel switch. 1910 * 1911 * @napi_poll: Poll Rx queue for incoming data frames. 1912 * 1913 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 1914 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 1915 * reject TX/RX mask combinations they cannot support by returning -EINVAL 1916 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 1917 * 1918 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 1919 * 1920 * @remain_on_channel: Starts an off-channel period on the given channel, must 1921 * call back to ieee80211_ready_on_channel() when on that channel. Note 1922 * that normal channel traffic is not stopped as this is intended for hw 1923 * offload. Frames to transmit on the off-channel channel are transmitted 1924 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 1925 * duration (which will always be non-zero) expires, the driver must call 1926 * ieee80211_remain_on_channel_expired(). This callback may sleep. 1927 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 1928 * aborted before it expires. This callback may sleep. 1929 * 1930 * @set_ringparam: Set tx and rx ring sizes. 1931 * 1932 * @get_ringparam: Get tx and rx ring current and maximum sizes. 1933 * 1934 * @tx_frames_pending: Check if there is any pending frame in the hardware 1935 * queues before entering power save. 1936 * 1937 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 1938 * when transmitting a frame. Currently only legacy rates are handled. 1939 * The callback can sleep. 1940 * @rssi_callback: Notify driver when the average RSSI goes above/below 1941 * thresholds that were registered previously. The callback can sleep. 1942 * 1943 * @release_buffered_frames: Release buffered frames according to the given 1944 * parameters. In the case where the driver buffers some frames for 1945 * sleeping stations mac80211 will use this callback to tell the driver 1946 * to release some frames, either for PS-poll or uAPSD. 1947 * Note that if the @more_data paramter is %false the driver must check 1948 * if there are more frames on the given TIDs, and if there are more than 1949 * the frames being released then it must still set the more-data bit in 1950 * the frame. If the @more_data parameter is %true, then of course the 1951 * more-data bit must always be set. 1952 * The @tids parameter tells the driver which TIDs to release frames 1953 * from, for PS-poll it will always have only a single bit set. 1954 * In the case this is used for uAPSD, the @num_frames parameter may be 1955 * bigger than one, but the driver may send fewer frames (it must send 1956 * at least one, however). In this case it is also responsible for 1957 * setting the EOSP flag in the QoS header of the frames. 1958 * This callback must be atomic. 1959 */ 1960struct ieee80211_ops { 1961 void (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 1962 int (*start)(struct ieee80211_hw *hw); 1963 void (*stop)(struct ieee80211_hw *hw); 1964#ifdef CONFIG_PM 1965 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 1966 int (*resume)(struct ieee80211_hw *hw); 1967#endif 1968 int (*add_interface)(struct ieee80211_hw *hw, 1969 struct ieee80211_vif *vif); 1970 int (*change_interface)(struct ieee80211_hw *hw, 1971 struct ieee80211_vif *vif, 1972 enum nl80211_iftype new_type, bool p2p); 1973 void (*remove_interface)(struct ieee80211_hw *hw, 1974 struct ieee80211_vif *vif); 1975 int (*config)(struct ieee80211_hw *hw, u32 changed); 1976 void (*bss_info_changed)(struct ieee80211_hw *hw, 1977 struct ieee80211_vif *vif, 1978 struct ieee80211_bss_conf *info, 1979 u32 changed); 1980 1981 int (*tx_sync)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 1982 const u8 *bssid, enum ieee80211_tx_sync_type type); 1983 void (*finish_tx_sync)(struct ieee80211_hw *hw, 1984 struct ieee80211_vif *vif, 1985 const u8 *bssid, 1986 enum ieee80211_tx_sync_type type); 1987 1988 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 1989 struct netdev_hw_addr_list *mc_list); 1990 void (*configure_filter)(struct ieee80211_hw *hw, 1991 unsigned int changed_flags, 1992 unsigned int *total_flags, 1993 u64 multicast); 1994 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 1995 bool set); 1996 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 1997 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 1998 struct ieee80211_key_conf *key); 1999 void (*update_tkip_key)(struct ieee80211_hw *hw, 2000 struct ieee80211_vif *vif, 2001 struct ieee80211_key_conf *conf, 2002 struct ieee80211_sta *sta, 2003 u32 iv32, u16 *phase1key); 2004 void (*set_rekey_data)(struct ieee80211_hw *hw, 2005 struct ieee80211_vif *vif, 2006 struct cfg80211_gtk_rekey_data *data); 2007 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2008 struct cfg80211_scan_request *req); 2009 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2010 struct ieee80211_vif *vif); 2011 int (*sched_scan_start)(struct ieee80211_hw *hw, 2012 struct ieee80211_vif *vif, 2013 struct cfg80211_sched_scan_request *req, 2014 struct ieee80211_sched_scan_ies *ies); 2015 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2016 struct ieee80211_vif *vif); 2017 void (*sw_scan_start)(struct ieee80211_hw *hw); 2018 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2019 int (*get_stats)(struct ieee80211_hw *hw, 2020 struct ieee80211_low_level_stats *stats); 2021 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2022 u32 *iv32, u16 *iv16); 2023 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2024 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2025 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2026 struct ieee80211_sta *sta); 2027 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2028 struct ieee80211_sta *sta); 2029 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2030 enum sta_notify_cmd, struct ieee80211_sta *sta); 2031 int (*conf_tx)(struct ieee80211_hw *hw, u16 queue, 2032 const struct ieee80211_tx_queue_params *params); 2033 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2034 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2035 u64 tsf); 2036 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2037 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2038 int (*ampdu_action)(struct ieee80211_hw *hw, 2039 struct ieee80211_vif *vif, 2040 enum ieee80211_ampdu_mlme_action action, 2041 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2042 u8 buf_size); 2043 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2044 struct survey_info *survey); 2045 void (*rfkill_poll)(struct ieee80211_hw *hw); 2046 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2047#ifdef CONFIG_NL80211_TESTMODE 2048 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2049 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2050 struct netlink_callback *cb, 2051 void *data, int len); 2052#endif 2053 void (*flush)(struct ieee80211_hw *hw, bool drop); 2054 void (*channel_switch)(struct ieee80211_hw *hw, 2055 struct ieee80211_channel_switch *ch_switch); 2056 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2057 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2058 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2059 2060 int (*remain_on_channel)(struct ieee80211_hw *hw, 2061 struct ieee80211_channel *chan, 2062 enum nl80211_channel_type channel_type, 2063 int duration); 2064 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2065 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2066 void (*get_ringparam)(struct ieee80211_hw *hw, 2067 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2068 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2069 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2070 const struct cfg80211_bitrate_mask *mask); 2071 void (*rssi_callback)(struct ieee80211_hw *hw, 2072 enum ieee80211_rssi_event rssi_event); 2073 2074 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2075 struct ieee80211_sta *sta, 2076 u16 tids, int num_frames, 2077 enum ieee80211_frame_release_type reason, 2078 bool more_data); 2079}; 2080 2081/** 2082 * ieee80211_alloc_hw - Allocate a new hardware device 2083 * 2084 * This must be called once for each hardware device. The returned pointer 2085 * must be used to refer to this device when calling other functions. 2086 * mac80211 allocates a private data area for the driver pointed to by 2087 * @priv in &struct ieee80211_hw, the size of this area is given as 2088 * @priv_data_len. 2089 * 2090 * @priv_data_len: length of private data 2091 * @ops: callbacks for this device 2092 */ 2093struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2094 const struct ieee80211_ops *ops); 2095 2096/** 2097 * ieee80211_register_hw - Register hardware device 2098 * 2099 * You must call this function before any other functions in 2100 * mac80211. Note that before a hardware can be registered, you 2101 * need to fill the contained wiphy's information. 2102 * 2103 * @hw: the device to register as returned by ieee80211_alloc_hw() 2104 */ 2105int ieee80211_register_hw(struct ieee80211_hw *hw); 2106 2107/** 2108 * struct ieee80211_tpt_blink - throughput blink description 2109 * @throughput: throughput in Kbit/sec 2110 * @blink_time: blink time in milliseconds 2111 * (full cycle, ie. one off + one on period) 2112 */ 2113struct ieee80211_tpt_blink { 2114 int throughput; 2115 int blink_time; 2116}; 2117 2118/** 2119 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2120 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2121 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2122 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2123 * interface is connected in some way, including being an AP 2124 */ 2125enum ieee80211_tpt_led_trigger_flags { 2126 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2127 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2128 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2129}; 2130 2131#ifdef CONFIG_MAC80211_LEDS 2132extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2133extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2134extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2135extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2136extern char *__ieee80211_create_tpt_led_trigger( 2137 struct ieee80211_hw *hw, unsigned int flags, 2138 const struct ieee80211_tpt_blink *blink_table, 2139 unsigned int blink_table_len); 2140#endif 2141/** 2142 * ieee80211_get_tx_led_name - get name of TX LED 2143 * 2144 * mac80211 creates a transmit LED trigger for each wireless hardware 2145 * that can be used to drive LEDs if your driver registers a LED device. 2146 * This function returns the name (or %NULL if not configured for LEDs) 2147 * of the trigger so you can automatically link the LED device. 2148 * 2149 * @hw: the hardware to get the LED trigger name for 2150 */ 2151static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2152{ 2153#ifdef CONFIG_MAC80211_LEDS 2154 return __ieee80211_get_tx_led_name(hw); 2155#else 2156 return NULL; 2157#endif 2158} 2159 2160/** 2161 * ieee80211_get_rx_led_name - get name of RX LED 2162 * 2163 * mac80211 creates a receive LED trigger for each wireless hardware 2164 * that can be used to drive LEDs if your driver registers a LED device. 2165 * This function returns the name (or %NULL if not configured for LEDs) 2166 * of the trigger so you can automatically link the LED device. 2167 * 2168 * @hw: the hardware to get the LED trigger name for 2169 */ 2170static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2171{ 2172#ifdef CONFIG_MAC80211_LEDS 2173 return __ieee80211_get_rx_led_name(hw); 2174#else 2175 return NULL; 2176#endif 2177} 2178 2179/** 2180 * ieee80211_get_assoc_led_name - get name of association LED 2181 * 2182 * mac80211 creates a association LED trigger for each wireless hardware 2183 * that can be used to drive LEDs if your driver registers a LED device. 2184 * This function returns the name (or %NULL if not configured for LEDs) 2185 * of the trigger so you can automatically link the LED device. 2186 * 2187 * @hw: the hardware to get the LED trigger name for 2188 */ 2189static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2190{ 2191#ifdef CONFIG_MAC80211_LEDS 2192 return __ieee80211_get_assoc_led_name(hw); 2193#else 2194 return NULL; 2195#endif 2196} 2197 2198/** 2199 * ieee80211_get_radio_led_name - get name of radio LED 2200 * 2201 * mac80211 creates a radio change LED trigger for each wireless hardware 2202 * that can be used to drive LEDs if your driver registers a LED device. 2203 * This function returns the name (or %NULL if not configured for LEDs) 2204 * of the trigger so you can automatically link the LED device. 2205 * 2206 * @hw: the hardware to get the LED trigger name for 2207 */ 2208static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2209{ 2210#ifdef CONFIG_MAC80211_LEDS 2211 return __ieee80211_get_radio_led_name(hw); 2212#else 2213 return NULL; 2214#endif 2215} 2216 2217/** 2218 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2219 * @hw: the hardware to create the trigger for 2220 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2221 * @blink_table: the blink table -- needs to be ordered by throughput 2222 * @blink_table_len: size of the blink table 2223 * 2224 * This function returns %NULL (in case of error, or if no LED 2225 * triggers are configured) or the name of the new trigger. 2226 * This function must be called before ieee80211_register_hw(). 2227 */ 2228static inline char * 2229ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2230 const struct ieee80211_tpt_blink *blink_table, 2231 unsigned int blink_table_len) 2232{ 2233#ifdef CONFIG_MAC80211_LEDS 2234 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2235 blink_table_len); 2236#else 2237 return NULL; 2238#endif 2239} 2240 2241/** 2242 * ieee80211_unregister_hw - Unregister a hardware device 2243 * 2244 * This function instructs mac80211 to free allocated resources 2245 * and unregister netdevices from the networking subsystem. 2246 * 2247 * @hw: the hardware to unregister 2248 */ 2249void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2250 2251/** 2252 * ieee80211_free_hw - free hardware descriptor 2253 * 2254 * This function frees everything that was allocated, including the 2255 * private data for the driver. You must call ieee80211_unregister_hw() 2256 * before calling this function. 2257 * 2258 * @hw: the hardware to free 2259 */ 2260void ieee80211_free_hw(struct ieee80211_hw *hw); 2261 2262/** 2263 * ieee80211_restart_hw - restart hardware completely 2264 * 2265 * Call this function when the hardware was restarted for some reason 2266 * (hardware error, ...) and the driver is unable to restore its state 2267 * by itself. mac80211 assumes that at this point the driver/hardware 2268 * is completely uninitialised and stopped, it starts the process by 2269 * calling the ->start() operation. The driver will need to reset all 2270 * internal state that it has prior to calling this function. 2271 * 2272 * @hw: the hardware to restart 2273 */ 2274void ieee80211_restart_hw(struct ieee80211_hw *hw); 2275 2276/** ieee80211_napi_schedule - schedule NAPI poll 2277 * 2278 * Use this function to schedule NAPI polling on a device. 2279 * 2280 * @hw: the hardware to start polling 2281 */ 2282void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2283 2284/** ieee80211_napi_complete - complete NAPI polling 2285 * 2286 * Use this function to finish NAPI polling on a device. 2287 * 2288 * @hw: the hardware to stop polling 2289 */ 2290void ieee80211_napi_complete(struct ieee80211_hw *hw); 2291 2292/** 2293 * ieee80211_rx - receive frame 2294 * 2295 * Use this function to hand received frames to mac80211. The receive 2296 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2297 * paged @skb is used, the driver is recommended to put the ieee80211 2298 * header of the frame on the linear part of the @skb to avoid memory 2299 * allocation and/or memcpy by the stack. 2300 * 2301 * This function may not be called in IRQ context. Calls to this function 2302 * for a single hardware must be synchronized against each other. Calls to 2303 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2304 * mixed for a single hardware. 2305 * 2306 * In process context use instead ieee80211_rx_ni(). 2307 * 2308 * @hw: the hardware this frame came in on 2309 * @skb: the buffer to receive, owned by mac80211 after this call 2310 */ 2311void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2312 2313/** 2314 * ieee80211_rx_irqsafe - receive frame 2315 * 2316 * Like ieee80211_rx() but can be called in IRQ context 2317 * (internally defers to a tasklet.) 2318 * 2319 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2320 * be mixed for a single hardware. 2321 * 2322 * @hw: the hardware this frame came in on 2323 * @skb: the buffer to receive, owned by mac80211 after this call 2324 */ 2325void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2326 2327/** 2328 * ieee80211_rx_ni - receive frame (in process context) 2329 * 2330 * Like ieee80211_rx() but can be called in process context 2331 * (internally disables bottom halves). 2332 * 2333 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2334 * not be mixed for a single hardware. 2335 * 2336 * @hw: the hardware this frame came in on 2337 * @skb: the buffer to receive, owned by mac80211 after this call 2338 */ 2339static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2340 struct sk_buff *skb) 2341{ 2342 local_bh_disable(); 2343 ieee80211_rx(hw, skb); 2344 local_bh_enable(); 2345} 2346 2347/** 2348 * ieee80211_sta_ps_transition - PS transition for connected sta 2349 * 2350 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2351 * flag set, use this function to inform mac80211 about a connected station 2352 * entering/leaving PS mode. 2353 * 2354 * This function may not be called in IRQ context or with softirqs enabled. 2355 * 2356 * Calls to this function for a single hardware must be synchronized against 2357 * each other. 2358 * 2359 * The function returns -EINVAL when the requested PS mode is already set. 2360 * 2361 * @sta: currently connected sta 2362 * @start: start or stop PS 2363 */ 2364int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 2365 2366/** 2367 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 2368 * (in process context) 2369 * 2370 * Like ieee80211_sta_ps_transition() but can be called in process context 2371 * (internally disables bottom halves). Concurrent call restriction still 2372 * applies. 2373 * 2374 * @sta: currently connected sta 2375 * @start: start or stop PS 2376 */ 2377static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 2378 bool start) 2379{ 2380 int ret; 2381 2382 local_bh_disable(); 2383 ret = ieee80211_sta_ps_transition(sta, start); 2384 local_bh_enable(); 2385 2386 return ret; 2387} 2388 2389/* 2390 * The TX headroom reserved by mac80211 for its own tx_status functions. 2391 * This is enough for the radiotap header. 2392 */ 2393#define IEEE80211_TX_STATUS_HEADROOM 13 2394 2395/** 2396 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 2397 * @sta: &struct ieee80211_sta pointer for the sleeping station 2398 * @tid: the TID that has buffered frames 2399 * @buffered: indicates whether or not frames are buffered for this TID 2400 * 2401 * If a driver buffers frames for a powersave station instead of passing 2402 * them back to mac80211 for retransmission, the station may still need 2403 * to be told that there are buffered frames via the TIM bit. 2404 * 2405 * This function informs mac80211 whether or not there are frames that are 2406 * buffered in the driver for a given TID; mac80211 can then use this data 2407 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 2408 * call! Beware of the locking!) 2409 * 2410 * If all frames are released to the station (due to PS-poll or uAPSD) 2411 * then the driver needs to inform mac80211 that there no longer are 2412 * frames buffered. However, when the station wakes up mac80211 assumes 2413 * that all buffered frames will be transmitted and clears this data, 2414 * drivers need to make sure they inform mac80211 about all buffered 2415 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 2416 * 2417 * Note that technically mac80211 only needs to know this per AC, not per 2418 * TID, but since driver buffering will inevitably happen per TID (since 2419 * it is related to aggregation) it is easier to make mac80211 map the 2420 * TID to the AC as required instead of keeping track in all drivers that 2421 * use this API. 2422 */ 2423void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 2424 u8 tid, bool buffered); 2425 2426/** 2427 * ieee80211_tx_status - transmit status callback 2428 * 2429 * Call this function for all transmitted frames after they have been 2430 * transmitted. It is permissible to not call this function for 2431 * multicast frames but this can affect statistics. 2432 * 2433 * This function may not be called in IRQ context. Calls to this function 2434 * for a single hardware must be synchronized against each other. Calls 2435 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 2436 * may not be mixed for a single hardware. 2437 * 2438 * @hw: the hardware the frame was transmitted by 2439 * @skb: the frame that was transmitted, owned by mac80211 after this call 2440 */ 2441void ieee80211_tx_status(struct ieee80211_hw *hw, 2442 struct sk_buff *skb); 2443 2444/** 2445 * ieee80211_tx_status_ni - transmit status callback (in process context) 2446 * 2447 * Like ieee80211_tx_status() but can be called in process context. 2448 * 2449 * Calls to this function, ieee80211_tx_status() and 2450 * ieee80211_tx_status_irqsafe() may not be mixed 2451 * for a single hardware. 2452 * 2453 * @hw: the hardware the frame was transmitted by 2454 * @skb: the frame that was transmitted, owned by mac80211 after this call 2455 */ 2456static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 2457 struct sk_buff *skb) 2458{ 2459 local_bh_disable(); 2460 ieee80211_tx_status(hw, skb); 2461 local_bh_enable(); 2462} 2463 2464/** 2465 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 2466 * 2467 * Like ieee80211_tx_status() but can be called in IRQ context 2468 * (internally defers to a tasklet.) 2469 * 2470 * Calls to this function, ieee80211_tx_status() and 2471 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 2472 * 2473 * @hw: the hardware the frame was transmitted by 2474 * @skb: the frame that was transmitted, owned by mac80211 after this call 2475 */ 2476void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 2477 struct sk_buff *skb); 2478 2479/** 2480 * ieee80211_report_low_ack - report non-responding station 2481 * 2482 * When operating in AP-mode, call this function to report a non-responding 2483 * connected STA. 2484 * 2485 * @sta: the non-responding connected sta 2486 * @num_packets: number of packets sent to @sta without a response 2487 */ 2488void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 2489 2490/** 2491 * ieee80211_beacon_get_tim - beacon generation function 2492 * @hw: pointer obtained from ieee80211_alloc_hw(). 2493 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2494 * @tim_offset: pointer to variable that will receive the TIM IE offset. 2495 * Set to 0 if invalid (in non-AP modes). 2496 * @tim_length: pointer to variable that will receive the TIM IE length, 2497 * (including the ID and length bytes!). 2498 * Set to 0 if invalid (in non-AP modes). 2499 * 2500 * If the driver implements beaconing modes, it must use this function to 2501 * obtain the beacon frame/template. 2502 * 2503 * If the beacon frames are generated by the host system (i.e., not in 2504 * hardware/firmware), the driver uses this function to get each beacon 2505 * frame from mac80211 -- it is responsible for calling this function 2506 * before the beacon is needed (e.g. based on hardware interrupt). 2507 * 2508 * If the beacon frames are generated by the device, then the driver 2509 * must use the returned beacon as the template and change the TIM IE 2510 * according to the current DTIM parameters/TIM bitmap. 2511 * 2512 * The driver is responsible for freeing the returned skb. 2513 */ 2514struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2515 struct ieee80211_vif *vif, 2516 u16 *tim_offset, u16 *tim_length); 2517 2518/** 2519 * ieee80211_beacon_get - beacon generation function 2520 * @hw: pointer obtained from ieee80211_alloc_hw(). 2521 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2522 * 2523 * See ieee80211_beacon_get_tim(). 2524 */ 2525static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2526 struct ieee80211_vif *vif) 2527{ 2528 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2529} 2530 2531/** 2532 * ieee80211_pspoll_get - retrieve a PS Poll template 2533 * @hw: pointer obtained from ieee80211_alloc_hw(). 2534 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2535 * 2536 * Creates a PS Poll a template which can, for example, uploaded to 2537 * hardware. The template must be updated after association so that correct 2538 * AID, BSSID and MAC address is used. 2539 * 2540 * Note: Caller (or hardware) is responsible for setting the 2541 * &IEEE80211_FCTL_PM bit. 2542 */ 2543struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2544 struct ieee80211_vif *vif); 2545 2546/** 2547 * ieee80211_nullfunc_get - retrieve a nullfunc template 2548 * @hw: pointer obtained from ieee80211_alloc_hw(). 2549 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2550 * 2551 * Creates a Nullfunc template which can, for example, uploaded to 2552 * hardware. The template must be updated after association so that correct 2553 * BSSID and address is used. 2554 * 2555 * Note: Caller (or hardware) is responsible for setting the 2556 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2557 */ 2558struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2559 struct ieee80211_vif *vif); 2560 2561/** 2562 * ieee80211_probereq_get - retrieve a Probe Request template 2563 * @hw: pointer obtained from ieee80211_alloc_hw(). 2564 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2565 * @ssid: SSID buffer 2566 * @ssid_len: length of SSID 2567 * @ie: buffer containing all IEs except SSID for the template 2568 * @ie_len: length of the IE buffer 2569 * 2570 * Creates a Probe Request template which can, for example, be uploaded to 2571 * hardware. 2572 */ 2573struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2574 struct ieee80211_vif *vif, 2575 const u8 *ssid, size_t ssid_len, 2576 const u8 *ie, size_t ie_len); 2577 2578/** 2579 * ieee80211_rts_get - RTS frame generation function 2580 * @hw: pointer obtained from ieee80211_alloc_hw(). 2581 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2582 * @frame: pointer to the frame that is going to be protected by the RTS. 2583 * @frame_len: the frame length (in octets). 2584 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2585 * @rts: The buffer where to store the RTS frame. 2586 * 2587 * If the RTS frames are generated by the host system (i.e., not in 2588 * hardware/firmware), the low-level driver uses this function to receive 2589 * the next RTS frame from the 802.11 code. The low-level is responsible 2590 * for calling this function before and RTS frame is needed. 2591 */ 2592void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2593 const void *frame, size_t frame_len, 2594 const struct ieee80211_tx_info *frame_txctl, 2595 struct ieee80211_rts *rts); 2596 2597/** 2598 * ieee80211_rts_duration - Get the duration field for an RTS frame 2599 * @hw: pointer obtained from ieee80211_alloc_hw(). 2600 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2601 * @frame_len: the length of the frame that is going to be protected by the RTS. 2602 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2603 * 2604 * If the RTS is generated in firmware, but the host system must provide 2605 * the duration field, the low-level driver uses this function to receive 2606 * the duration field value in little-endian byteorder. 2607 */ 2608__le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2609 struct ieee80211_vif *vif, size_t frame_len, 2610 const struct ieee80211_tx_info *frame_txctl); 2611 2612/** 2613 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2614 * @hw: pointer obtained from ieee80211_alloc_hw(). 2615 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2616 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2617 * @frame_len: the frame length (in octets). 2618 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2619 * @cts: The buffer where to store the CTS-to-self frame. 2620 * 2621 * If the CTS-to-self frames are generated by the host system (i.e., not in 2622 * hardware/firmware), the low-level driver uses this function to receive 2623 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2624 * for calling this function before and CTS-to-self frame is needed. 2625 */ 2626void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2627 struct ieee80211_vif *vif, 2628 const void *frame, size_t frame_len, 2629 const struct ieee80211_tx_info *frame_txctl, 2630 struct ieee80211_cts *cts); 2631 2632/** 2633 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2634 * @hw: pointer obtained from ieee80211_alloc_hw(). 2635 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2636 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2637 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2638 * 2639 * If the CTS-to-self is generated in firmware, but the host system must provide 2640 * the duration field, the low-level driver uses this function to receive 2641 * the duration field value in little-endian byteorder. 2642 */ 2643__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2644 struct ieee80211_vif *vif, 2645 size_t frame_len, 2646 const struct ieee80211_tx_info *frame_txctl); 2647 2648/** 2649 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2650 * @hw: pointer obtained from ieee80211_alloc_hw(). 2651 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2652 * @frame_len: the length of the frame. 2653 * @rate: the rate at which the frame is going to be transmitted. 2654 * 2655 * Calculate the duration field of some generic frame, given its 2656 * length and transmission rate (in 100kbps). 2657 */ 2658__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2659 struct ieee80211_vif *vif, 2660 size_t frame_len, 2661 struct ieee80211_rate *rate); 2662 2663/** 2664 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2665 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2666 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2667 * 2668 * Function for accessing buffered broadcast and multicast frames. If 2669 * hardware/firmware does not implement buffering of broadcast/multicast 2670 * frames when power saving is used, 802.11 code buffers them in the host 2671 * memory. The low-level driver uses this function to fetch next buffered 2672 * frame. In most cases, this is used when generating beacon frame. This 2673 * function returns a pointer to the next buffered skb or NULL if no more 2674 * buffered frames are available. 2675 * 2676 * Note: buffered frames are returned only after DTIM beacon frame was 2677 * generated with ieee80211_beacon_get() and the low-level driver must thus 2678 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2679 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2680 * does not need to check for DTIM beacons separately and should be able to 2681 * use common code for all beacons. 2682 */ 2683struct sk_buff * 2684ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2685 2686/** 2687 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 2688 * 2689 * This function returns the TKIP phase 1 key for the given IV32. 2690 * 2691 * @keyconf: the parameter passed with the set key 2692 * @iv32: IV32 to get the P1K for 2693 * @p1k: a buffer to which the key will be written, as 5 u16 values 2694 */ 2695void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 2696 u32 iv32, u16 *p1k); 2697 2698/** 2699 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 2700 * 2701 * This function returns the TKIP phase 1 key for the IV32 taken 2702 * from the given packet. 2703 * 2704 * @keyconf: the parameter passed with the set key 2705 * @skb: the packet to take the IV32 value from that will be encrypted 2706 * with this P1K 2707 * @p1k: a buffer to which the key will be written, as 5 u16 values 2708 */ 2709static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 2710 struct sk_buff *skb, u16 *p1k) 2711{ 2712 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2713 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 2714 u32 iv32 = get_unaligned_le32(&data[4]); 2715 2716 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 2717} 2718 2719/** 2720 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 2721 * 2722 * This function returns the TKIP phase 1 key for the given IV32 2723 * and transmitter address. 2724 * 2725 * @keyconf: the parameter passed with the set key 2726 * @ta: TA that will be used with the key 2727 * @iv32: IV32 to get the P1K for 2728 * @p1k: a buffer to which the key will be written, as 5 u16 values 2729 */ 2730void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 2731 const u8 *ta, u32 iv32, u16 *p1k); 2732 2733/** 2734 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 2735 * 2736 * This function computes the TKIP RC4 key for the IV values 2737 * in the packet. 2738 * 2739 * @keyconf: the parameter passed with the set key 2740 * @skb: the packet to take the IV32/IV16 values from that will be 2741 * encrypted with this key 2742 * @p2k: a buffer to which the key will be written, 16 bytes 2743 */ 2744void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 2745 struct sk_buff *skb, u8 *p2k); 2746 2747/** 2748 * struct ieee80211_key_seq - key sequence counter 2749 * 2750 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 2751 * @ccmp: PN data, most significant byte first (big endian, 2752 * reverse order than in packet) 2753 * @aes_cmac: PN data, most significant byte first (big endian, 2754 * reverse order than in packet) 2755 */ 2756struct ieee80211_key_seq { 2757 union { 2758 struct { 2759 u32 iv32; 2760 u16 iv16; 2761 } tkip; 2762 struct { 2763 u8 pn[6]; 2764 } ccmp; 2765 struct { 2766 u8 pn[6]; 2767 } aes_cmac; 2768 }; 2769}; 2770 2771/** 2772 * ieee80211_get_key_tx_seq - get key TX sequence counter 2773 * 2774 * @keyconf: the parameter passed with the set key 2775 * @seq: buffer to receive the sequence data 2776 * 2777 * This function allows a driver to retrieve the current TX IV/PN 2778 * for the given key. It must not be called if IV generation is 2779 * offloaded to the device. 2780 * 2781 * Note that this function may only be called when no TX processing 2782 * can be done concurrently, for example when queues are stopped 2783 * and the stop has been synchronized. 2784 */ 2785void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 2786 struct ieee80211_key_seq *seq); 2787 2788/** 2789 * ieee80211_get_key_rx_seq - get key RX sequence counter 2790 * 2791 * @keyconf: the parameter passed with the set key 2792 * @tid: The TID, or -1 for the management frame value (CCMP only); 2793 * the value on TID 0 is also used for non-QoS frames. For 2794 * CMAC, only TID 0 is valid. 2795 * @seq: buffer to receive the sequence data 2796 * 2797 * This function allows a driver to retrieve the current RX IV/PNs 2798 * for the given key. It must not be called if IV checking is done 2799 * by the device and not by mac80211. 2800 * 2801 * Note that this function may only be called when no RX processing 2802 * can be done concurrently. 2803 */ 2804void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 2805 int tid, struct ieee80211_key_seq *seq); 2806 2807/** 2808 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 2809 * @vif: virtual interface the rekeying was done on 2810 * @bssid: The BSSID of the AP, for checking association 2811 * @replay_ctr: the new replay counter after GTK rekeying 2812 * @gfp: allocation flags 2813 */ 2814void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 2815 const u8 *replay_ctr, gfp_t gfp); 2816 2817/** 2818 * ieee80211_wake_queue - wake specific queue 2819 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2820 * @queue: queue number (counted from zero). 2821 * 2822 * Drivers should use this function instead of netif_wake_queue. 2823 */ 2824void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 2825 2826/** 2827 * ieee80211_stop_queue - stop specific queue 2828 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2829 * @queue: queue number (counted from zero). 2830 * 2831 * Drivers should use this function instead of netif_stop_queue. 2832 */ 2833void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 2834 2835/** 2836 * ieee80211_queue_stopped - test status of the queue 2837 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2838 * @queue: queue number (counted from zero). 2839 * 2840 * Drivers should use this function instead of netif_stop_queue. 2841 */ 2842 2843int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 2844 2845/** 2846 * ieee80211_stop_queues - stop all queues 2847 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2848 * 2849 * Drivers should use this function instead of netif_stop_queue. 2850 */ 2851void ieee80211_stop_queues(struct ieee80211_hw *hw); 2852 2853/** 2854 * ieee80211_wake_queues - wake all queues 2855 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2856 * 2857 * Drivers should use this function instead of netif_wake_queue. 2858 */ 2859void ieee80211_wake_queues(struct ieee80211_hw *hw); 2860 2861/** 2862 * ieee80211_scan_completed - completed hardware scan 2863 * 2864 * When hardware scan offload is used (i.e. the hw_scan() callback is 2865 * assigned) this function needs to be called by the driver to notify 2866 * mac80211 that the scan finished. This function can be called from 2867 * any context, including hardirq context. 2868 * 2869 * @hw: the hardware that finished the scan 2870 * @aborted: set to true if scan was aborted 2871 */ 2872void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 2873 2874/** 2875 * ieee80211_sched_scan_results - got results from scheduled scan 2876 * 2877 * When a scheduled scan is running, this function needs to be called by the 2878 * driver whenever there are new scan results available. 2879 * 2880 * @hw: the hardware that is performing scheduled scans 2881 */ 2882void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 2883 2884/** 2885 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 2886 * 2887 * When a scheduled scan is running, this function can be called by 2888 * the driver if it needs to stop the scan to perform another task. 2889 * Usual scenarios are drivers that cannot continue the scheduled scan 2890 * while associating, for instance. 2891 * 2892 * @hw: the hardware that is performing scheduled scans 2893 */ 2894void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 2895 2896/** 2897 * ieee80211_iterate_active_interfaces - iterate active interfaces 2898 * 2899 * This function iterates over the interfaces associated with a given 2900 * hardware that are currently active and calls the callback for them. 2901 * This function allows the iterator function to sleep, when the iterator 2902 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 2903 * be used. 2904 * Does not iterate over a new interface during add_interface() 2905 * 2906 * @hw: the hardware struct of which the interfaces should be iterated over 2907 * @iterator: the iterator function to call 2908 * @data: first argument of the iterator function 2909 */ 2910void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 2911 void (*iterator)(void *data, u8 *mac, 2912 struct ieee80211_vif *vif), 2913 void *data); 2914 2915/** 2916 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 2917 * 2918 * This function iterates over the interfaces associated with a given 2919 * hardware that are currently active and calls the callback for them. 2920 * This function requires the iterator callback function to be atomic, 2921 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 2922 * Does not iterate over a new interface during add_interface() 2923 * 2924 * @hw: the hardware struct of which the interfaces should be iterated over 2925 * @iterator: the iterator function to call, cannot sleep 2926 * @data: first argument of the iterator function 2927 */ 2928void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 2929 void (*iterator)(void *data, 2930 u8 *mac, 2931 struct ieee80211_vif *vif), 2932 void *data); 2933 2934/** 2935 * ieee80211_queue_work - add work onto the mac80211 workqueue 2936 * 2937 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 2938 * This helper ensures drivers are not queueing work when they should not be. 2939 * 2940 * @hw: the hardware struct for the interface we are adding work for 2941 * @work: the work we want to add onto the mac80211 workqueue 2942 */ 2943void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 2944 2945/** 2946 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 2947 * 2948 * Drivers and mac80211 use this to queue delayed work onto the mac80211 2949 * workqueue. 2950 * 2951 * @hw: the hardware struct for the interface we are adding work for 2952 * @dwork: delayable work to queue onto the mac80211 workqueue 2953 * @delay: number of jiffies to wait before queueing 2954 */ 2955void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 2956 struct delayed_work *dwork, 2957 unsigned long delay); 2958 2959/** 2960 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 2961 * @sta: the station for which to start a BA session 2962 * @tid: the TID to BA on. 2963 * @timeout: session timeout value (in TUs) 2964 * 2965 * Return: success if addBA request was sent, failure otherwise 2966 * 2967 * Although mac80211/low level driver/user space application can estimate 2968 * the need to start aggregation on a certain RA/TID, the session level 2969 * will be managed by the mac80211. 2970 */ 2971int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 2972 u16 timeout); 2973 2974/** 2975 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 2976 * @vif: &struct ieee80211_vif pointer from the add_interface callback 2977 * @ra: receiver address of the BA session recipient. 2978 * @tid: the TID to BA on. 2979 * 2980 * This function must be called by low level driver once it has 2981 * finished with preparations for the BA session. It can be called 2982 * from any context. 2983 */ 2984void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 2985 u16 tid); 2986 2987/** 2988 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 2989 * @sta: the station whose BA session to stop 2990 * @tid: the TID to stop BA. 2991 * 2992 * Return: negative error if the TID is invalid, or no aggregation active 2993 * 2994 * Although mac80211/low level driver/user space application can estimate 2995 * the need to stop aggregation on a certain RA/TID, the session level 2996 * will be managed by the mac80211. 2997 */ 2998int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 2999 3000/** 3001 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3002 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3003 * @ra: receiver address of the BA session recipient. 3004 * @tid: the desired TID to BA on. 3005 * 3006 * This function must be called by low level driver once it has 3007 * finished with preparations for the BA session tear down. It 3008 * can be called from any context. 3009 */ 3010void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3011 u16 tid); 3012 3013/** 3014 * ieee80211_find_sta - find a station 3015 * 3016 * @vif: virtual interface to look for station on 3017 * @addr: station's address 3018 * 3019 * This function must be called under RCU lock and the 3020 * resulting pointer is only valid under RCU lock as well. 3021 */ 3022struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3023 const u8 *addr); 3024 3025/** 3026 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3027 * 3028 * @hw: pointer as obtained from ieee80211_alloc_hw() 3029 * @addr: remote station's address 3030 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3031 * 3032 * This function must be called under RCU lock and the 3033 * resulting pointer is only valid under RCU lock as well. 3034 * 3035 * NOTE: You may pass NULL for localaddr, but then you will just get 3036 * the first STA that matches the remote address 'addr'. 3037 * We can have multiple STA associated with multiple 3038 * logical stations (e.g. consider a station connecting to another 3039 * BSSID on the same AP hardware without disconnecting first). 3040 * In this case, the result of this method with localaddr NULL 3041 * is not reliable. 3042 * 3043 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3044 */ 3045struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3046 const u8 *addr, 3047 const u8 *localaddr); 3048 3049/** 3050 * ieee80211_sta_block_awake - block station from waking up 3051 * @hw: the hardware 3052 * @pubsta: the station 3053 * @block: whether to block or unblock 3054 * 3055 * Some devices require that all frames that are on the queues 3056 * for a specific station that went to sleep are flushed before 3057 * a poll response or frames after the station woke up can be 3058 * delivered to that it. Note that such frames must be rejected 3059 * by the driver as filtered, with the appropriate status flag. 3060 * 3061 * This function allows implementing this mode in a race-free 3062 * manner. 3063 * 3064 * To do this, a driver must keep track of the number of frames 3065 * still enqueued for a specific station. If this number is not 3066 * zero when the station goes to sleep, the driver must call 3067 * this function to force mac80211 to consider the station to 3068 * be asleep regardless of the station's actual state. Once the 3069 * number of outstanding frames reaches zero, the driver must 3070 * call this function again to unblock the station. That will 3071 * cause mac80211 to be able to send ps-poll responses, and if 3072 * the station queried in the meantime then frames will also 3073 * be sent out as a result of this. Additionally, the driver 3074 * will be notified that the station woke up some time after 3075 * it is unblocked, regardless of whether the station actually 3076 * woke up while blocked or not. 3077 */ 3078void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3079 struct ieee80211_sta *pubsta, bool block); 3080 3081/** 3082 * ieee80211_iter_keys - iterate keys programmed into the device 3083 * @hw: pointer obtained from ieee80211_alloc_hw() 3084 * @vif: virtual interface to iterate, may be %NULL for all 3085 * @iter: iterator function that will be called for each key 3086 * @iter_data: custom data to pass to the iterator function 3087 * 3088 * This function can be used to iterate all the keys known to 3089 * mac80211, even those that weren't previously programmed into 3090 * the device. This is intended for use in WoWLAN if the device 3091 * needs reprogramming of the keys during suspend. Note that due 3092 * to locking reasons, it is also only safe to call this at few 3093 * spots since it must hold the RTNL and be able to sleep. 3094 * 3095 * The order in which the keys are iterated matches the order 3096 * in which they were originally installed and handed to the 3097 * set_key callback. 3098 */ 3099void ieee80211_iter_keys(struct ieee80211_hw *hw, 3100 struct ieee80211_vif *vif, 3101 void (*iter)(struct ieee80211_hw *hw, 3102 struct ieee80211_vif *vif, 3103 struct ieee80211_sta *sta, 3104 struct ieee80211_key_conf *key, 3105 void *data), 3106 void *iter_data); 3107 3108/** 3109 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3110 * @hw: pointer obtained from ieee80211_alloc_hw(). 3111 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3112 * 3113 * Creates a Probe Request template which can, for example, be uploaded to 3114 * hardware. The template is filled with bssid, ssid and supported rate 3115 * information. This function must only be called from within the 3116 * .bss_info_changed callback function and only in managed mode. The function 3117 * is only useful when the interface is associated, otherwise it will return 3118 * NULL. 3119 */ 3120struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3121 struct ieee80211_vif *vif); 3122 3123/** 3124 * ieee80211_beacon_loss - inform hardware does not receive beacons 3125 * 3126 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3127 * 3128 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER and 3129 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3130 * hardware is not receiving beacons with this function. 3131 */ 3132void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3133 3134/** 3135 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3136 * 3137 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3138 * 3139 * When beacon filtering is enabled with %IEEE80211_HW_BEACON_FILTER, and 3140 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3141 * needs to inform if the connection to the AP has been lost. 3142 * 3143 * This function will cause immediate change to disassociated state, 3144 * without connection recovery attempts. 3145 */ 3146void ieee80211_connection_loss(struct ieee80211_vif *vif); 3147 3148/** 3149 * ieee80211_resume_disconnect - disconnect from AP after resume 3150 * 3151 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3152 * 3153 * Instructs mac80211 to disconnect from the AP after resume. 3154 * Drivers can use this after WoWLAN if they know that the 3155 * connection cannot be kept up, for example because keys were 3156 * used while the device was asleep but the replay counters or 3157 * similar cannot be retrieved from the device during resume. 3158 * 3159 * Note that due to implementation issues, if the driver uses 3160 * the reconfiguration functionality during resume the interface 3161 * will still be added as associated first during resume and then 3162 * disconnect normally later. 3163 * 3164 * This function can only be called from the resume callback and 3165 * the driver must not be holding any of its own locks while it 3166 * calls this function, or at least not any locks it needs in the 3167 * key configuration paths (if it supports HW crypto). 3168 */ 3169void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3170 3171/** 3172 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3173 * 3174 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3175 * 3176 * Some hardware require full power save to manage simultaneous BT traffic 3177 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3178 * burst of BT traffic. The hardware gets information of BT traffic via 3179 * hardware co-existence lines, and consequentially requests mac80211 to 3180 * (temporarily) enter full psm. 3181 * This function will only temporarily disable dynamic PS, not enable PSM if 3182 * it was not already enabled. 3183 * The driver must make sure to re-enable dynamic PS using 3184 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3185 * 3186 */ 3187void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3188 3189/** 3190 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3191 * 3192 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3193 * 3194 * This function restores dynamic PS after being temporarily disabled via 3195 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3196 * be coupled with an eventual call to this function. 3197 * 3198 */ 3199void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3200 3201/** 3202 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3203 * rssi threshold triggered 3204 * 3205 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3206 * @rssi_event: the RSSI trigger event type 3207 * @gfp: context flags 3208 * 3209 * When the %IEEE80211_HW_SUPPORTS_CQM_RSSI is set, and a connection quality 3210 * monitoring is configured with an rssi threshold, the driver will inform 3211 * whenever the rssi level reaches the threshold. 3212 */ 3213void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3214 enum nl80211_cqm_rssi_threshold_event rssi_event, 3215 gfp_t gfp); 3216 3217/** 3218 * ieee80211_get_operstate - get the operstate of the vif 3219 * 3220 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3221 * 3222 * The driver might need to know the operstate of the net_device 3223 * (specifically, whether the link is IF_OPER_UP after resume) 3224 */ 3225unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif); 3226 3227/** 3228 * ieee80211_chswitch_done - Complete channel switch process 3229 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3230 * @success: make the channel switch successful or not 3231 * 3232 * Complete the channel switch post-process: set the new operational channel 3233 * and wake up the suspended queues. 3234 */ 3235void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3236 3237/** 3238 * ieee80211_request_smps - request SM PS transition 3239 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3240 * @smps_mode: new SM PS mode 3241 * 3242 * This allows the driver to request an SM PS transition in managed 3243 * mode. This is useful when the driver has more information than 3244 * the stack about possible interference, for example by bluetooth. 3245 */ 3246void ieee80211_request_smps(struct ieee80211_vif *vif, 3247 enum ieee80211_smps_mode smps_mode); 3248 3249/** 3250 * ieee80211_key_removed - disable hw acceleration for key 3251 * @key_conf: The key hw acceleration should be disabled for 3252 * 3253 * This allows drivers to indicate that the given key has been 3254 * removed from hardware acceleration, due to a new key that 3255 * was added. Don't use this if the key can continue to be used 3256 * for TX, if the key restriction is on RX only it is permitted 3257 * to keep the key for TX only and not call this function. 3258 * 3259 * Due to locking constraints, it may only be called during 3260 * @set_key. This function must be allowed to sleep, and the 3261 * key it tries to disable may still be used until it returns. 3262 */ 3263void ieee80211_key_removed(struct ieee80211_key_conf *key_conf); 3264 3265/** 3266 * ieee80211_ready_on_channel - notification of remain-on-channel start 3267 * @hw: pointer as obtained from ieee80211_alloc_hw() 3268 */ 3269void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 3270 3271/** 3272 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 3273 * @hw: pointer as obtained from ieee80211_alloc_hw() 3274 */ 3275void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 3276 3277/** 3278 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 3279 * 3280 * in order not to harm the system performance and user experience, the device 3281 * may request not to allow any rx ba session and tear down existing rx ba 3282 * sessions based on system constraints such as periodic BT activity that needs 3283 * to limit wlan activity (eg.sco or a2dp)." 3284 * in such cases, the intention is to limit the duration of the rx ppdu and 3285 * therefore prevent the peer device to use a-mpdu aggregation. 3286 * 3287 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3288 * @ba_rx_bitmap: Bit map of open rx ba per tid 3289 * @addr: & to bssid mac address 3290 */ 3291void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 3292 const u8 *addr); 3293 3294/** 3295 * ieee80211_send_bar - send a BlockAckReq frame 3296 * 3297 * can be used to flush pending frames from the peer's aggregation reorder 3298 * buffer. 3299 * 3300 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3301 * @ra: the peer's destination address 3302 * @tid: the TID of the aggregation session 3303 * @ssn: the new starting sequence number for the receiver 3304 */ 3305void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 3306 3307/* Rate control API */ 3308 3309/** 3310 * enum rate_control_changed - flags to indicate which parameter changed 3311 * 3312 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 3313 * changed, rate control algorithm can update its internal state if needed. 3314 */ 3315enum rate_control_changed { 3316 IEEE80211_RC_HT_CHANGED = BIT(0) 3317}; 3318 3319/** 3320 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 3321 * 3322 * @hw: The hardware the algorithm is invoked for. 3323 * @sband: The band this frame is being transmitted on. 3324 * @bss_conf: the current BSS configuration 3325 * @reported_rate: The rate control algorithm can fill this in to indicate 3326 * which rate should be reported to userspace as the current rate and 3327 * used for rate calculations in the mesh network. 3328 * @rts: whether RTS will be used for this frame because it is longer than the 3329 * RTS threshold 3330 * @short_preamble: whether mac80211 will request short-preamble transmission 3331 * if the selected rate supports it 3332 * @max_rate_idx: user-requested maximum rate (not MCS for now) 3333 * (deprecated; this will be removed once drivers get updated to use 3334 * rate_idx_mask) 3335 * @rate_idx_mask: user-requested rate mask (not MCS for now) 3336 * @skb: the skb that will be transmitted, the control information in it needs 3337 * to be filled in 3338 * @bss: whether this frame is sent out in AP or IBSS mode 3339 */ 3340struct ieee80211_tx_rate_control { 3341 struct ieee80211_hw *hw; 3342 struct ieee80211_supported_band *sband; 3343 struct ieee80211_bss_conf *bss_conf; 3344 struct sk_buff *skb; 3345 struct ieee80211_tx_rate reported_rate; 3346 bool rts, short_preamble; 3347 u8 max_rate_idx; 3348 u32 rate_idx_mask; 3349 bool bss; 3350}; 3351 3352struct rate_control_ops { 3353 struct module *module; 3354 const char *name; 3355 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 3356 void (*free)(void *priv); 3357 3358 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 3359 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 3360 struct ieee80211_sta *sta, void *priv_sta); 3361 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 3362 struct ieee80211_sta *sta, 3363 void *priv_sta, u32 changed, 3364 enum nl80211_channel_type oper_chan_type); 3365 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 3366 void *priv_sta); 3367 3368 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 3369 struct ieee80211_sta *sta, void *priv_sta, 3370 struct sk_buff *skb); 3371 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 3372 struct ieee80211_tx_rate_control *txrc); 3373 3374 void (*add_sta_debugfs)(void *priv, void *priv_sta, 3375 struct dentry *dir); 3376 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 3377}; 3378 3379static inline int rate_supported(struct ieee80211_sta *sta, 3380 enum ieee80211_band band, 3381 int index) 3382{ 3383 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 3384} 3385 3386/** 3387 * rate_control_send_low - helper for drivers for management/no-ack frames 3388 * 3389 * Rate control algorithms that agree to use the lowest rate to 3390 * send management frames and NO_ACK data with the respective hw 3391 * retries should use this in the beginning of their mac80211 get_rate 3392 * callback. If true is returned the rate control can simply return. 3393 * If false is returned we guarantee that sta and sta and priv_sta is 3394 * not null. 3395 * 3396 * Rate control algorithms wishing to do more intelligent selection of 3397 * rate for multicast/broadcast frames may choose to not use this. 3398 * 3399 * @sta: &struct ieee80211_sta pointer to the target destination. Note 3400 * that this may be null. 3401 * @priv_sta: private rate control structure. This may be null. 3402 * @txrc: rate control information we sholud populate for mac80211. 3403 */ 3404bool rate_control_send_low(struct ieee80211_sta *sta, 3405 void *priv_sta, 3406 struct ieee80211_tx_rate_control *txrc); 3407 3408 3409static inline s8 3410rate_lowest_index(struct ieee80211_supported_band *sband, 3411 struct ieee80211_sta *sta) 3412{ 3413 int i; 3414 3415 for (i = 0; i < sband->n_bitrates; i++) 3416 if (rate_supported(sta, sband->band, i)) 3417 return i; 3418 3419 /* warn when we cannot find a rate. */ 3420 WARN_ON(1); 3421 3422 return 0; 3423} 3424 3425static inline 3426bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 3427 struct ieee80211_sta *sta) 3428{ 3429 unsigned int i; 3430 3431 for (i = 0; i < sband->n_bitrates; i++) 3432 if (rate_supported(sta, sband->band, i)) 3433 return true; 3434 return false; 3435} 3436 3437int ieee80211_rate_control_register(struct rate_control_ops *ops); 3438void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 3439 3440static inline bool 3441conf_is_ht20(struct ieee80211_conf *conf) 3442{ 3443 return conf->channel_type == NL80211_CHAN_HT20; 3444} 3445 3446static inline bool 3447conf_is_ht40_minus(struct ieee80211_conf *conf) 3448{ 3449 return conf->channel_type == NL80211_CHAN_HT40MINUS; 3450} 3451 3452static inline bool 3453conf_is_ht40_plus(struct ieee80211_conf *conf) 3454{ 3455 return conf->channel_type == NL80211_CHAN_HT40PLUS; 3456} 3457 3458static inline bool 3459conf_is_ht40(struct ieee80211_conf *conf) 3460{ 3461 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 3462} 3463 3464static inline bool 3465conf_is_ht(struct ieee80211_conf *conf) 3466{ 3467 return conf->channel_type != NL80211_CHAN_NO_HT; 3468} 3469 3470static inline enum nl80211_iftype 3471ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 3472{ 3473 if (p2p) { 3474 switch (type) { 3475 case NL80211_IFTYPE_STATION: 3476 return NL80211_IFTYPE_P2P_CLIENT; 3477 case NL80211_IFTYPE_AP: 3478 return NL80211_IFTYPE_P2P_GO; 3479 default: 3480 break; 3481 } 3482 } 3483 return type; 3484} 3485 3486static inline enum nl80211_iftype 3487ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 3488{ 3489 return ieee80211_iftype_p2p(vif->type, vif->p2p); 3490} 3491 3492void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 3493 int rssi_min_thold, 3494 int rssi_max_thold); 3495 3496void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 3497 3498int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb); 3499 3500int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, 3501 struct sk_buff *skb); 3502#endif /* MAC80211_H */ 3503