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/bug.h> 17 #include <linux/kernel.h> 18 #include <linux/if_ether.h> 19 #include <linux/skbuff.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 struct device; 91 92 /** 93 * enum ieee80211_max_queues - maximum number of queues 94 * 95 * @IEEE80211_MAX_QUEUES: Maximum number of regular device queues. 96 */ 97 enum ieee80211_max_queues { 98 IEEE80211_MAX_QUEUES = 16, 99 }; 100 101 #define IEEE80211_INVAL_HW_QUEUE 0xff 102 103 /** 104 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 105 * @IEEE80211_AC_VO: voice 106 * @IEEE80211_AC_VI: video 107 * @IEEE80211_AC_BE: best effort 108 * @IEEE80211_AC_BK: background 109 */ 110 enum ieee80211_ac_numbers { 111 IEEE80211_AC_VO = 0, 112 IEEE80211_AC_VI = 1, 113 IEEE80211_AC_BE = 2, 114 IEEE80211_AC_BK = 3, 115 }; 116 #define IEEE80211_NUM_ACS 4 117 118 /** 119 * struct ieee80211_tx_queue_params - transmit queue configuration 120 * 121 * The information provided in this structure is required for QoS 122 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 123 * 124 * @aifs: arbitration interframe space [0..255] 125 * @cw_min: minimum contention window [a value of the form 126 * 2^n-1 in the range 1..32767] 127 * @cw_max: maximum contention window [like @cw_min] 128 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 129 * @uapsd: is U-APSD mode enabled for the queue 130 */ 131 struct ieee80211_tx_queue_params { 132 u16 txop; 133 u16 cw_min; 134 u16 cw_max; 135 u8 aifs; 136 bool uapsd; 137 }; 138 139 struct ieee80211_low_level_stats { 140 unsigned int dot11ACKFailureCount; 141 unsigned int dot11RTSFailureCount; 142 unsigned int dot11FCSErrorCount; 143 unsigned int dot11RTSSuccessCount; 144 }; 145 146 /** 147 * enum ieee80211_chanctx_change - change flag for channel context 148 * @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed 149 * @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed 150 */ 151 enum ieee80211_chanctx_change { 152 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 153 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 154 }; 155 156 /** 157 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 158 * 159 * This is the driver-visible part. The ieee80211_chanctx 160 * that contains it is visible in mac80211 only. 161 * 162 * @def: the channel definition 163 * @rx_chains_static: The number of RX chains that must always be 164 * active on the channel to receive MIMO transmissions 165 * @rx_chains_dynamic: The number of RX chains that must be enabled 166 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 167 * this will always be >= @rx_chains_static. 168 * @drv_priv: data area for driver use, will always be aligned to 169 * sizeof(void *), size is determined in hw information. 170 */ 171 struct ieee80211_chanctx_conf { 172 struct cfg80211_chan_def def; 173 174 u8 rx_chains_static, rx_chains_dynamic; 175 176 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 177 }; 178 179 /** 180 * enum ieee80211_bss_change - BSS change notification flags 181 * 182 * These flags are used with the bss_info_changed() callback 183 * to indicate which BSS parameter changed. 184 * 185 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 186 * also implies a change in the AID. 187 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 188 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 189 * @BSS_CHANGED_ERP_SLOT: slot timing changed 190 * @BSS_CHANGED_HT: 802.11n parameters changed 191 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 192 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 193 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 194 * reason (IBSS and managed mode) 195 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 196 * new beacon (beaconing modes) 197 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 198 * enabled/disabled (beaconing modes) 199 * @BSS_CHANGED_CQM: Connection quality monitor config changed 200 * @BSS_CHANGED_IBSS: IBSS join status changed 201 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 202 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 203 * that it is only ever disabled for station mode. 204 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 205 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 206 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 207 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 208 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 209 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 210 * changed (currently only in P2P client mode, GO mode will be later) 211 */ 212 enum ieee80211_bss_change { 213 BSS_CHANGED_ASSOC = 1<<0, 214 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 215 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 216 BSS_CHANGED_ERP_SLOT = 1<<3, 217 BSS_CHANGED_HT = 1<<4, 218 BSS_CHANGED_BASIC_RATES = 1<<5, 219 BSS_CHANGED_BEACON_INT = 1<<6, 220 BSS_CHANGED_BSSID = 1<<7, 221 BSS_CHANGED_BEACON = 1<<8, 222 BSS_CHANGED_BEACON_ENABLED = 1<<9, 223 BSS_CHANGED_CQM = 1<<10, 224 BSS_CHANGED_IBSS = 1<<11, 225 BSS_CHANGED_ARP_FILTER = 1<<12, 226 BSS_CHANGED_QOS = 1<<13, 227 BSS_CHANGED_IDLE = 1<<14, 228 BSS_CHANGED_SSID = 1<<15, 229 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 230 BSS_CHANGED_PS = 1<<17, 231 BSS_CHANGED_TXPOWER = 1<<18, 232 BSS_CHANGED_P2P_PS = 1<<19, 233 234 /* when adding here, make sure to change ieee80211_reconfig */ 235 }; 236 237 /* 238 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 239 * of addresses for an interface increase beyond this value, hardware ARP 240 * filtering will be disabled. 241 */ 242 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 243 244 /** 245 * enum ieee80211_rssi_event - RSSI threshold event 246 * An indicator for when RSSI goes below/above a certain threshold. 247 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 248 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 249 */ 250 enum ieee80211_rssi_event { 251 RSSI_EVENT_HIGH, 252 RSSI_EVENT_LOW, 253 }; 254 255 /** 256 * struct ieee80211_bss_conf - holds the BSS's changing parameters 257 * 258 * This structure keeps information about a BSS (and an association 259 * to that BSS) that can change during the lifetime of the BSS. 260 * 261 * @assoc: association status 262 * @ibss_joined: indicates whether this station is part of an IBSS 263 * or not 264 * @ibss_creator: indicates if a new IBSS network is being created 265 * @aid: association ID number, valid only when @assoc is true 266 * @use_cts_prot: use CTS protection 267 * @use_short_preamble: use 802.11b short preamble; 268 * if the hardware cannot handle this it must set the 269 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 270 * @use_short_slot: use short slot time (only relevant for ERP); 271 * if the hardware cannot handle this it must set the 272 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 273 * @dtim_period: num of beacons before the next DTIM, for beaconing, 274 * valid in station mode only while @assoc is true and if also 275 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 276 * @ps_dtim_period) 277 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 278 * as it may have been received during scanning long ago) 279 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 280 * the driver/device can use this to calculate synchronisation 281 * @beacon_int: beacon interval 282 * @assoc_capability: capabilities taken from assoc resp 283 * @basic_rates: bitmap of basic rates, each bit stands for an 284 * index into the rate table configured by the driver in 285 * the current band. 286 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 287 * @bssid: The BSSID for this BSS 288 * @enable_beacon: whether beaconing should be enabled or not 289 * @chandef: Channel definition for this BSS -- the hardware might be 290 * configured a higher bandwidth than this BSS uses, for example. 291 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 292 * This field is only valid when the channel type is one of the HT types. 293 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 294 * implies disabled 295 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 296 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 297 * may filter ARP queries targeted for other addresses than listed here. 298 * The driver must allow ARP queries targeted for all address listed here 299 * to pass through. An empty list implies no ARP queries need to pass. 300 * @arp_addr_cnt: Number of addresses currently on the list. 301 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 302 * filter ARP queries based on the @arp_addr_list, if disabled, the 303 * hardware must not perform any ARP filtering. Note, that the filter will 304 * be enabled also in promiscuous mode. 305 * @qos: This is a QoS-enabled BSS. 306 * @idle: This interface is idle. There's also a global idle flag in the 307 * hardware config which may be more appropriate depending on what 308 * your driver/device needs to do. 309 * @ps: power-save mode (STA only). This flag is NOT affected by 310 * offchannel/dynamic_ps operations. 311 * @ssid: The SSID of the current vif. Only valid in AP-mode. 312 * @ssid_len: Length of SSID given in @ssid. 313 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 314 * @txpower: TX power in dBm 315 * @p2p_ctwindow: P2P CTWindow, only for P2P client interfaces 316 * @p2p_oppps: P2P opportunistic PS is enabled 317 */ 318 struct ieee80211_bss_conf { 319 const u8 *bssid; 320 /* association related data */ 321 bool assoc, ibss_joined; 322 bool ibss_creator; 323 u16 aid; 324 /* erp related data */ 325 bool use_cts_prot; 326 bool use_short_preamble; 327 bool use_short_slot; 328 bool enable_beacon; 329 u8 dtim_period; 330 u16 beacon_int; 331 u16 assoc_capability; 332 u64 sync_tsf; 333 u32 sync_device_ts; 334 u32 basic_rates; 335 int mcast_rate[IEEE80211_NUM_BANDS]; 336 u16 ht_operation_mode; 337 s32 cqm_rssi_thold; 338 u32 cqm_rssi_hyst; 339 struct cfg80211_chan_def chandef; 340 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 341 u8 arp_addr_cnt; 342 bool arp_filter_enabled; 343 bool qos; 344 bool idle; 345 bool ps; 346 u8 ssid[IEEE80211_MAX_SSID_LEN]; 347 size_t ssid_len; 348 bool hidden_ssid; 349 int txpower; 350 u8 p2p_ctwindow; 351 bool p2p_oppps; 352 }; 353 354 /** 355 * enum mac80211_tx_control_flags - flags to describe transmission information/status 356 * 357 * These flags are used with the @flags member of &ieee80211_tx_info. 358 * 359 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 360 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 361 * number to this frame, taking care of not overwriting the fragment 362 * number and increasing the sequence number only when the 363 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 364 * assign sequence numbers to QoS-data frames but cannot do so correctly 365 * for non-QoS-data and management frames because beacons need them from 366 * that counter as well and mac80211 cannot guarantee proper sequencing. 367 * If this flag is set, the driver should instruct the hardware to 368 * assign a sequence number to the frame or assign one itself. Cf. IEEE 369 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 370 * beacons and always be clear for frames without a sequence number field. 371 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 372 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 373 * station 374 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 375 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 376 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 377 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 378 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 379 * because the destination STA was in powersave mode. Note that to 380 * avoid race conditions, the filter must be set by the hardware or 381 * firmware upon receiving a frame that indicates that the station 382 * went to sleep (must be done on device to filter frames already on 383 * the queue) and may only be unset after mac80211 gives the OK for 384 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 385 * since only then is it guaranteed that no more frames are in the 386 * hardware queue. 387 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 388 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 389 * is for the whole aggregation. 390 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 391 * so consider using block ack request (BAR). 392 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 393 * set by rate control algorithms to indicate probe rate, will 394 * be cleared for fragmented frames (except on the last fragment) 395 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 396 * used to indicate that a pending frame requires TX processing before 397 * it can be sent out. 398 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 399 * used to indicate that a frame was already retried due to PS 400 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 401 * used to indicate frame should not be encrypted 402 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 403 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 404 * be sent although the station is in powersave mode. 405 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 406 * transmit function after the current frame, this can be used 407 * by drivers to kick the DMA queue only if unset or when the 408 * queue gets full. 409 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 410 * after TX status because the destination was asleep, it must not 411 * be modified again (no seqno assignment, crypto, etc.) 412 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 413 * MLME command (internal to mac80211 to figure out whether to send TX 414 * status to user space) 415 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 416 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 417 * frame and selects the maximum number of streams that it can use. 418 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 419 * the off-channel channel when a remain-on-channel offload is done 420 * in hardware -- normal packets still flow and are expected to be 421 * handled properly by the device. 422 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 423 * testing. It will be sent out with incorrect Michael MIC key to allow 424 * TKIP countermeasures to be tested. 425 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 426 * This flag is actually used for management frame especially for P2P 427 * frames not being sent at CCK rate in 2GHz band. 428 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 429 * when its status is reported the service period ends. For frames in 430 * an SP that mac80211 transmits, it is already set; for driver frames 431 * the driver may set this flag. It is also used to do the same for 432 * PS-Poll responses. 433 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 434 * This flag is used to send nullfunc frame at minimum rate when 435 * the nullfunc is used for connection monitoring purpose. 436 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 437 * would be fragmented by size (this is optional, only used for 438 * monitor injection). 439 * 440 * Note: If you have to add new flags to the enumeration, then don't 441 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 442 */ 443 enum mac80211_tx_control_flags { 444 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 445 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 446 IEEE80211_TX_CTL_NO_ACK = BIT(2), 447 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 448 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 449 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 450 IEEE80211_TX_CTL_AMPDU = BIT(6), 451 IEEE80211_TX_CTL_INJECTED = BIT(7), 452 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 453 IEEE80211_TX_STAT_ACK = BIT(9), 454 IEEE80211_TX_STAT_AMPDU = BIT(10), 455 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 456 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 457 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 458 IEEE80211_TX_INTFL_RETRIED = BIT(15), 459 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 460 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 461 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 462 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 463 /* hole at 20, use later */ 464 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 465 IEEE80211_TX_CTL_LDPC = BIT(22), 466 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 467 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 468 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 469 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 470 IEEE80211_TX_STATUS_EOSP = BIT(28), 471 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 472 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 473 }; 474 475 #define IEEE80211_TX_CTL_STBC_SHIFT 23 476 477 /* 478 * This definition is used as a mask to clear all temporary flags, which are 479 * set by the tx handlers for each transmission attempt by the mac80211 stack. 480 */ 481 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 482 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 483 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 484 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 485 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 486 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 487 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 488 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 489 490 /** 491 * enum mac80211_rate_control_flags - per-rate flags set by the 492 * Rate Control algorithm. 493 * 494 * These flags are set by the Rate control algorithm for each rate during tx, 495 * in the @flags member of struct ieee80211_tx_rate. 496 * 497 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 498 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 499 * This is set if the current BSS requires ERP protection. 500 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 501 * @IEEE80211_TX_RC_MCS: HT rate. 502 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 503 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 504 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 505 * Greenfield mode. 506 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 507 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 508 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 509 * (80+80 isn't supported yet) 510 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 511 * adjacent 20 MHz channels, if the current channel type is 512 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 513 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 514 */ 515 enum mac80211_rate_control_flags { 516 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 517 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 518 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 519 520 /* rate index is an HT/VHT MCS instead of an index */ 521 IEEE80211_TX_RC_MCS = BIT(3), 522 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 523 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 524 IEEE80211_TX_RC_DUP_DATA = BIT(6), 525 IEEE80211_TX_RC_SHORT_GI = BIT(7), 526 IEEE80211_TX_RC_VHT_MCS = BIT(8), 527 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 528 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 529 }; 530 531 532 /* there are 40 bytes if you don't need the rateset to be kept */ 533 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 534 535 /* if you do need the rateset, then you have less space */ 536 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 537 538 /* maximum number of rate stages */ 539 #define IEEE80211_TX_MAX_RATES 4 540 541 /** 542 * struct ieee80211_tx_rate - rate selection/status 543 * 544 * @idx: rate index to attempt to send with 545 * @flags: rate control flags (&enum mac80211_rate_control_flags) 546 * @count: number of tries in this rate before going to the next rate 547 * 548 * A value of -1 for @idx indicates an invalid rate and, if used 549 * in an array of retry rates, that no more rates should be tried. 550 * 551 * When used for transmit status reporting, the driver should 552 * always report the rate along with the flags it used. 553 * 554 * &struct ieee80211_tx_info contains an array of these structs 555 * in the control information, and it will be filled by the rate 556 * control algorithm according to what should be sent. For example, 557 * if this array contains, in the format { <idx>, <count> } the 558 * information 559 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 560 * then this means that the frame should be transmitted 561 * up to twice at rate 3, up to twice at rate 2, and up to four 562 * times at rate 1 if it doesn't get acknowledged. Say it gets 563 * acknowledged by the peer after the fifth attempt, the status 564 * information should then contain 565 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 566 * since it was transmitted twice at rate 3, twice at rate 2 567 * and once at rate 1 after which we received an acknowledgement. 568 */ 569 struct ieee80211_tx_rate { 570 s8 idx; 571 u16 count:5, 572 flags:11; 573 } __packed; 574 575 #define IEEE80211_MAX_TX_RETRY 31 576 577 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 578 u8 mcs, u8 nss) 579 { 580 WARN_ON(mcs & ~0xF); 581 WARN_ON(nss & ~0x7); 582 rate->idx = (nss << 4) | mcs; 583 } 584 585 static inline u8 586 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 587 { 588 return rate->idx & 0xF; 589 } 590 591 static inline u8 592 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 593 { 594 return rate->idx >> 4; 595 } 596 597 /** 598 * struct ieee80211_tx_info - skb transmit information 599 * 600 * This structure is placed in skb->cb for three uses: 601 * (1) mac80211 TX control - mac80211 tells the driver what to do 602 * (2) driver internal use (if applicable) 603 * (3) TX status information - driver tells mac80211 what happened 604 * 605 * @flags: transmit info flags, defined above 606 * @band: the band to transmit on (use for checking for races) 607 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 608 * @ack_frame_id: internal frame ID for TX status, used internally 609 * @control: union for control data 610 * @status: union for status data 611 * @driver_data: array of driver_data pointers 612 * @ampdu_ack_len: number of acked aggregated frames. 613 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 614 * @ampdu_len: number of aggregated frames. 615 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 616 * @ack_signal: signal strength of the ACK frame 617 */ 618 struct ieee80211_tx_info { 619 /* common information */ 620 u32 flags; 621 u8 band; 622 623 u8 hw_queue; 624 625 u16 ack_frame_id; 626 627 union { 628 struct { 629 union { 630 /* rate control */ 631 struct { 632 struct ieee80211_tx_rate rates[ 633 IEEE80211_TX_MAX_RATES]; 634 s8 rts_cts_rate_idx; 635 /* 3 bytes free */ 636 }; 637 /* only needed before rate control */ 638 unsigned long jiffies; 639 }; 640 /* NB: vif can be NULL for injected frames */ 641 struct ieee80211_vif *vif; 642 struct ieee80211_key_conf *hw_key; 643 /* 8 bytes free */ 644 } control; 645 struct { 646 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 647 int ack_signal; 648 u8 ampdu_ack_len; 649 u8 ampdu_len; 650 u8 antenna; 651 /* 21 bytes free */ 652 } status; 653 struct { 654 struct ieee80211_tx_rate driver_rates[ 655 IEEE80211_TX_MAX_RATES]; 656 void *rate_driver_data[ 657 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 658 }; 659 void *driver_data[ 660 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 661 }; 662 }; 663 664 /** 665 * struct ieee80211_sched_scan_ies - scheduled scan IEs 666 * 667 * This structure is used to pass the appropriate IEs to be used in scheduled 668 * scans for all bands. It contains both the IEs passed from the userspace 669 * and the ones generated by mac80211. 670 * 671 * @ie: array with the IEs for each supported band 672 * @len: array with the total length of the IEs for each band 673 */ 674 struct ieee80211_sched_scan_ies { 675 u8 *ie[IEEE80211_NUM_BANDS]; 676 size_t len[IEEE80211_NUM_BANDS]; 677 }; 678 679 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 680 { 681 return (struct ieee80211_tx_info *)skb->cb; 682 } 683 684 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 685 { 686 return (struct ieee80211_rx_status *)skb->cb; 687 } 688 689 /** 690 * ieee80211_tx_info_clear_status - clear TX status 691 * 692 * @info: The &struct ieee80211_tx_info to be cleared. 693 * 694 * When the driver passes an skb back to mac80211, it must report 695 * a number of things in TX status. This function clears everything 696 * in the TX status but the rate control information (it does clear 697 * the count since you need to fill that in anyway). 698 * 699 * NOTE: You can only use this function if you do NOT use 700 * info->driver_data! Use info->rate_driver_data 701 * instead if you need only the less space that allows. 702 */ 703 static inline void 704 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 705 { 706 int i; 707 708 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 709 offsetof(struct ieee80211_tx_info, control.rates)); 710 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 711 offsetof(struct ieee80211_tx_info, driver_rates)); 712 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 713 /* clear the rate counts */ 714 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 715 info->status.rates[i].count = 0; 716 717 BUILD_BUG_ON( 718 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 719 memset(&info->status.ampdu_ack_len, 0, 720 sizeof(struct ieee80211_tx_info) - 721 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 722 } 723 724 725 /** 726 * enum mac80211_rx_flags - receive flags 727 * 728 * These flags are used with the @flag member of &struct ieee80211_rx_status. 729 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 730 * Use together with %RX_FLAG_MMIC_STRIPPED. 731 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 732 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 733 * verification has been done by the hardware. 734 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 735 * If this flag is set, the stack cannot do any replay detection 736 * hence the driver or hardware will have to do that. 737 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 738 * the frame. 739 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 740 * the frame. 741 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 742 * field) is valid and contains the time the first symbol of the MPDU 743 * was received. This is useful in monitor mode and for proper IBSS 744 * merging. 745 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 746 * field) is valid and contains the time the last symbol of the MPDU 747 * (including FCS) was received. 748 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 749 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 750 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 751 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 752 * @RX_FLAG_80MHZ: 80 MHz was used 753 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 754 * @RX_FLAG_160MHZ: 160 MHz was used 755 * @RX_FLAG_SHORT_GI: Short guard interval was used 756 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 757 * Valid only for data frames (mainly A-MPDU) 758 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 759 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 760 * to hw.radiotap_mcs_details to advertise that fact 761 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 762 * number (@ampdu_reference) must be populated and be a distinct number for 763 * each A-MPDU 764 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 765 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 766 * monitoring purposes only 767 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 768 * subframes of a single A-MPDU 769 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 770 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 771 * on this subframe 772 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 773 * is stored in the @ampdu_delimiter_crc field) 774 */ 775 enum mac80211_rx_flags { 776 RX_FLAG_MMIC_ERROR = BIT(0), 777 RX_FLAG_DECRYPTED = BIT(1), 778 RX_FLAG_MMIC_STRIPPED = BIT(3), 779 RX_FLAG_IV_STRIPPED = BIT(4), 780 RX_FLAG_FAILED_FCS_CRC = BIT(5), 781 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 782 RX_FLAG_MACTIME_START = BIT(7), 783 RX_FLAG_SHORTPRE = BIT(8), 784 RX_FLAG_HT = BIT(9), 785 RX_FLAG_40MHZ = BIT(10), 786 RX_FLAG_SHORT_GI = BIT(11), 787 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 788 RX_FLAG_HT_GF = BIT(13), 789 RX_FLAG_AMPDU_DETAILS = BIT(14), 790 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 791 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 792 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 793 RX_FLAG_AMPDU_IS_LAST = BIT(18), 794 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 795 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 796 RX_FLAG_MACTIME_END = BIT(21), 797 RX_FLAG_VHT = BIT(22), 798 RX_FLAG_80MHZ = BIT(23), 799 RX_FLAG_80P80MHZ = BIT(24), 800 RX_FLAG_160MHZ = BIT(25), 801 }; 802 803 /** 804 * struct ieee80211_rx_status - receive status 805 * 806 * The low-level driver should provide this information (the subset 807 * supported by hardware) to the 802.11 code with each received 808 * frame, in the skb's control buffer (cb). 809 * 810 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 811 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 812 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 813 * it but can store it and pass it back to the driver for synchronisation 814 * @band: the active band when this frame was received 815 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 816 * @signal: signal strength when receiving this frame, either in dBm, in dB or 817 * unspecified depending on the hardware capabilities flags 818 * @IEEE80211_HW_SIGNAL_* 819 * @antenna: antenna used 820 * @rate_idx: index of data rate into band's supported rates or MCS index if 821 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 822 * @vht_nss: number of streams (VHT only) 823 * @flag: %RX_FLAG_* 824 * @rx_flags: internal RX flags for mac80211 825 * @ampdu_reference: A-MPDU reference number, must be a different value for 826 * each A-MPDU but the same for each subframe within one A-MPDU 827 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 828 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 829 * @vendor_radiotap_len: radiotap vendor namespace length 830 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 831 * that the actual data must be at the start of the SKB data 832 * already. 833 * @vendor_radiotap_oui: radiotap vendor namespace OUI 834 * @vendor_radiotap_subns: radiotap vendor sub namespace 835 */ 836 struct ieee80211_rx_status { 837 u64 mactime; 838 u32 device_timestamp; 839 u32 ampdu_reference; 840 u32 flag; 841 u32 vendor_radiotap_bitmap; 842 u16 vendor_radiotap_len; 843 u16 freq; 844 u8 rate_idx; 845 u8 vht_nss; 846 u8 rx_flags; 847 u8 band; 848 u8 antenna; 849 s8 signal; 850 u8 ampdu_delimiter_crc; 851 u8 vendor_radiotap_align; 852 u8 vendor_radiotap_oui[3]; 853 u8 vendor_radiotap_subns; 854 }; 855 856 /** 857 * enum ieee80211_conf_flags - configuration flags 858 * 859 * Flags to define PHY configuration options 860 * 861 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 862 * to determine for example whether to calculate timestamps for packets 863 * or not, do not use instead of filter flags! 864 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 865 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 866 * meaning that the hardware still wakes up for beacons, is able to 867 * transmit frames and receive the possible acknowledgment frames. 868 * Not to be confused with hardware specific wakeup/sleep states, 869 * driver is responsible for that. See the section "Powersave support" 870 * for more. 871 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 872 * the driver should be prepared to handle configuration requests but 873 * may turn the device off as much as possible. Typically, this flag will 874 * be set when an interface is set UP but not associated or scanning, but 875 * it can also be unset in that case when monitor interfaces are active. 876 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 877 * operating channel. 878 */ 879 enum ieee80211_conf_flags { 880 IEEE80211_CONF_MONITOR = (1<<0), 881 IEEE80211_CONF_PS = (1<<1), 882 IEEE80211_CONF_IDLE = (1<<2), 883 IEEE80211_CONF_OFFCHANNEL = (1<<3), 884 }; 885 886 887 /** 888 * enum ieee80211_conf_changed - denotes which configuration changed 889 * 890 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 891 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 892 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 893 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 894 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 895 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 896 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 897 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 898 * Note that this is only valid if channel contexts are not used, 899 * otherwise each channel context has the number of chains listed. 900 */ 901 enum ieee80211_conf_changed { 902 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 903 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 904 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 905 IEEE80211_CONF_CHANGE_PS = BIT(4), 906 IEEE80211_CONF_CHANGE_POWER = BIT(5), 907 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 908 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 909 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 910 }; 911 912 /** 913 * enum ieee80211_smps_mode - spatial multiplexing power save mode 914 * 915 * @IEEE80211_SMPS_AUTOMATIC: automatic 916 * @IEEE80211_SMPS_OFF: off 917 * @IEEE80211_SMPS_STATIC: static 918 * @IEEE80211_SMPS_DYNAMIC: dynamic 919 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 920 */ 921 enum ieee80211_smps_mode { 922 IEEE80211_SMPS_AUTOMATIC, 923 IEEE80211_SMPS_OFF, 924 IEEE80211_SMPS_STATIC, 925 IEEE80211_SMPS_DYNAMIC, 926 927 /* keep last */ 928 IEEE80211_SMPS_NUM_MODES, 929 }; 930 931 /** 932 * struct ieee80211_conf - configuration of the device 933 * 934 * This struct indicates how the driver shall configure the hardware. 935 * 936 * @flags: configuration flags defined above 937 * 938 * @listen_interval: listen interval in units of beacon interval 939 * @max_sleep_period: the maximum number of beacon intervals to sleep for 940 * before checking the beacon for a TIM bit (managed mode only); this 941 * value will be only achievable between DTIM frames, the hardware 942 * needs to check for the multicast traffic bit in DTIM beacons. 943 * This variable is valid only when the CONF_PS flag is set. 944 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 945 * in power saving. Power saving will not be enabled until a beacon 946 * has been received and the DTIM period is known. 947 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 948 * powersave documentation below. This variable is valid only when 949 * the CONF_PS flag is set. 950 * 951 * @power_level: requested transmit power (in dBm), backward compatibility 952 * value only that is set to the minimum of all interfaces 953 * 954 * @channel: the channel to tune to 955 * @channel_type: the channel (HT) type 956 * 957 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 958 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 959 * but actually means the number of transmissions not the number of retries 960 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 961 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 962 * number of transmissions not the number of retries 963 * 964 * @smps_mode: spatial multiplexing powersave mode; note that 965 * %IEEE80211_SMPS_STATIC is used when the device is not 966 * configured for an HT channel. 967 * Note that this is only valid if channel contexts are not used, 968 * otherwise each channel context has the number of chains listed. 969 */ 970 struct ieee80211_conf { 971 u32 flags; 972 int power_level, dynamic_ps_timeout; 973 int max_sleep_period; 974 975 u16 listen_interval; 976 u8 ps_dtim_period; 977 978 u8 long_frame_max_tx_count, short_frame_max_tx_count; 979 980 struct ieee80211_channel *channel; 981 enum nl80211_channel_type channel_type; 982 enum ieee80211_smps_mode smps_mode; 983 }; 984 985 /** 986 * struct ieee80211_channel_switch - holds the channel switch data 987 * 988 * The information provided in this structure is required for channel switch 989 * operation. 990 * 991 * @timestamp: value in microseconds of the 64-bit Time Synchronization 992 * Function (TSF) timer when the frame containing the channel switch 993 * announcement was received. This is simply the rx.mactime parameter 994 * the driver passed into mac80211. 995 * @block_tx: Indicates whether transmission must be blocked before the 996 * scheduled channel switch, as indicated by the AP. 997 * @channel: the new channel to switch to 998 * @count: the number of TBTT's until the channel switch event 999 */ 1000 struct ieee80211_channel_switch { 1001 u64 timestamp; 1002 bool block_tx; 1003 struct ieee80211_channel *channel; 1004 u8 count; 1005 }; 1006 1007 /** 1008 * enum ieee80211_vif_flags - virtual interface flags 1009 * 1010 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1011 * on this virtual interface to avoid unnecessary CPU wakeups 1012 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1013 * monitoring on this virtual interface -- i.e. it can monitor 1014 * connection quality related parameters, such as the RSSI level and 1015 * provide notifications if configured trigger levels are reached. 1016 */ 1017 enum ieee80211_vif_flags { 1018 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1019 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1020 }; 1021 1022 /** 1023 * struct ieee80211_vif - per-interface data 1024 * 1025 * Data in this structure is continually present for driver 1026 * use during the life of a virtual interface. 1027 * 1028 * @type: type of this virtual interface 1029 * @bss_conf: BSS configuration for this interface, either our own 1030 * or the BSS we're associated to 1031 * @addr: address of this interface 1032 * @p2p: indicates whether this AP or STA interface is a p2p 1033 * interface, i.e. a GO or p2p-sta respectively 1034 * @driver_flags: flags/capabilities the driver has for this interface, 1035 * these need to be set (or cleared) when the interface is added 1036 * or, if supported by the driver, the interface type is changed 1037 * at runtime, mac80211 will never touch this field 1038 * @hw_queue: hardware queue for each AC 1039 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1040 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1041 * when it is not assigned. This pointer is RCU-protected due to the TX 1042 * path needing to access it; even though the netdev carrier will always 1043 * be off when it is %NULL there can still be races and packets could be 1044 * processed after it switches back to %NULL. 1045 * @drv_priv: data area for driver use, will always be aligned to 1046 * sizeof(void *). 1047 */ 1048 struct ieee80211_vif { 1049 enum nl80211_iftype type; 1050 struct ieee80211_bss_conf bss_conf; 1051 u8 addr[ETH_ALEN]; 1052 bool p2p; 1053 1054 u8 cab_queue; 1055 u8 hw_queue[IEEE80211_NUM_ACS]; 1056 1057 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1058 1059 u32 driver_flags; 1060 1061 /* must be last */ 1062 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 1063 }; 1064 1065 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1066 { 1067 #ifdef CONFIG_MAC80211_MESH 1068 return vif->type == NL80211_IFTYPE_MESH_POINT; 1069 #endif 1070 return false; 1071 } 1072 1073 /** 1074 * enum ieee80211_key_flags - key flags 1075 * 1076 * These flags are used for communication about keys between the driver 1077 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1078 * 1079 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 1080 * that the STA this key will be used with could be using QoS. 1081 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1082 * driver to indicate that it requires IV generation for this 1083 * particular key. 1084 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1085 * the driver for a TKIP key if it requires Michael MIC 1086 * generation in software. 1087 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1088 * that the key is pairwise rather then a shared key. 1089 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1090 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1091 * be done in software. 1092 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1093 * if space should be prepared for the IV, but the IV 1094 * itself should not be generated. Do not set together with 1095 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1096 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1097 * management frames. The flag can help drivers that have a hardware 1098 * crypto implementation that doesn't deal with management frames 1099 * properly by allowing them to not upload the keys to hardware and 1100 * fall back to software crypto. Note that this flag deals only with 1101 * RX, if your crypto engine can't deal with TX you can also set the 1102 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1103 */ 1104 enum ieee80211_key_flags { 1105 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 1106 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1107 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1108 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1109 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1110 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1111 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1112 }; 1113 1114 /** 1115 * struct ieee80211_key_conf - key information 1116 * 1117 * This key information is given by mac80211 to the driver by 1118 * the set_key() callback in &struct ieee80211_ops. 1119 * 1120 * @hw_key_idx: To be set by the driver, this is the key index the driver 1121 * wants to be given when a frame is transmitted and needs to be 1122 * encrypted in hardware. 1123 * @cipher: The key's cipher suite selector. 1124 * @flags: key flags, see &enum ieee80211_key_flags. 1125 * @keyidx: the key index (0-3) 1126 * @keylen: key material length 1127 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1128 * data block: 1129 * - Temporal Encryption Key (128 bits) 1130 * - Temporal Authenticator Tx MIC Key (64 bits) 1131 * - Temporal Authenticator Rx MIC Key (64 bits) 1132 * @icv_len: The ICV length for this key type 1133 * @iv_len: The IV length for this key type 1134 */ 1135 struct ieee80211_key_conf { 1136 u32 cipher; 1137 u8 icv_len; 1138 u8 iv_len; 1139 u8 hw_key_idx; 1140 u8 flags; 1141 s8 keyidx; 1142 u8 keylen; 1143 u8 key[0]; 1144 }; 1145 1146 /** 1147 * enum set_key_cmd - key command 1148 * 1149 * Used with the set_key() callback in &struct ieee80211_ops, this 1150 * indicates whether a key is being removed or added. 1151 * 1152 * @SET_KEY: a key is set 1153 * @DISABLE_KEY: a key must be disabled 1154 */ 1155 enum set_key_cmd { 1156 SET_KEY, DISABLE_KEY, 1157 }; 1158 1159 /** 1160 * enum ieee80211_sta_state - station state 1161 * 1162 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1163 * this is a special state for add/remove transitions 1164 * @IEEE80211_STA_NONE: station exists without special state 1165 * @IEEE80211_STA_AUTH: station is authenticated 1166 * @IEEE80211_STA_ASSOC: station is associated 1167 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1168 */ 1169 enum ieee80211_sta_state { 1170 /* NOTE: These need to be ordered correctly! */ 1171 IEEE80211_STA_NOTEXIST, 1172 IEEE80211_STA_NONE, 1173 IEEE80211_STA_AUTH, 1174 IEEE80211_STA_ASSOC, 1175 IEEE80211_STA_AUTHORIZED, 1176 }; 1177 1178 /** 1179 * struct ieee80211_sta - station table entry 1180 * 1181 * A station table entry represents a station we are possibly 1182 * communicating with. Since stations are RCU-managed in 1183 * mac80211, any ieee80211_sta pointer you get access to must 1184 * either be protected by rcu_read_lock() explicitly or implicitly, 1185 * or you must take good care to not use such a pointer after a 1186 * call to your sta_remove callback that removed it. 1187 * 1188 * @addr: MAC address 1189 * @aid: AID we assigned to the station if we're an AP 1190 * @supp_rates: Bitmap of supported rates (per band) 1191 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1192 * @vht_cap: VHT capabilities of this STA; Not restricting any capabilities 1193 * of remote STA. Taking as is. 1194 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1195 * @drv_priv: data area for driver use, will always be aligned to 1196 * sizeof(void *), size is determined in hw information. 1197 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1198 * if wme is supported. 1199 * @max_sp: max Service Period. Only valid if wme is supported. 1200 */ 1201 struct ieee80211_sta { 1202 u32 supp_rates[IEEE80211_NUM_BANDS]; 1203 u8 addr[ETH_ALEN]; 1204 u16 aid; 1205 struct ieee80211_sta_ht_cap ht_cap; 1206 struct ieee80211_sta_vht_cap vht_cap; 1207 bool wme; 1208 u8 uapsd_queues; 1209 u8 max_sp; 1210 1211 /* must be last */ 1212 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 1213 }; 1214 1215 /** 1216 * enum sta_notify_cmd - sta notify command 1217 * 1218 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1219 * indicates if an associated station made a power state transition. 1220 * 1221 * @STA_NOTIFY_SLEEP: a station is now sleeping 1222 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1223 */ 1224 enum sta_notify_cmd { 1225 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1226 }; 1227 1228 /** 1229 * struct ieee80211_tx_control - TX control data 1230 * 1231 * @sta: station table entry, this sta pointer may be NULL and 1232 * it is not allowed to copy the pointer, due to RCU. 1233 */ 1234 struct ieee80211_tx_control { 1235 struct ieee80211_sta *sta; 1236 }; 1237 1238 /** 1239 * enum ieee80211_hw_flags - hardware flags 1240 * 1241 * These flags are used to indicate hardware capabilities to 1242 * the stack. Generally, flags here should have their meaning 1243 * done in a way that the simplest hardware doesn't need setting 1244 * any particular flags. There are some exceptions to this rule, 1245 * however, so you are advised to review these flags carefully. 1246 * 1247 * @IEEE80211_HW_HAS_RATE_CONTROL: 1248 * The hardware or firmware includes rate control, and cannot be 1249 * controlled by the stack. As such, no rate control algorithm 1250 * should be instantiated, and the TX rate reported to userspace 1251 * will be taken from the TX status instead of the rate control 1252 * algorithm. 1253 * Note that this requires that the driver implement a number of 1254 * callbacks so it has the correct information, it needs to have 1255 * the @set_rts_threshold callback and must look at the BSS config 1256 * @use_cts_prot for G/N protection, @use_short_slot for slot 1257 * timing in 2.4 GHz and @use_short_preamble for preambles for 1258 * CCK frames. 1259 * 1260 * @IEEE80211_HW_RX_INCLUDES_FCS: 1261 * Indicates that received frames passed to the stack include 1262 * the FCS at the end. 1263 * 1264 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1265 * Some wireless LAN chipsets buffer broadcast/multicast frames 1266 * for power saving stations in the hardware/firmware and others 1267 * rely on the host system for such buffering. This option is used 1268 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1269 * multicast frames when there are power saving stations so that 1270 * the driver can fetch them with ieee80211_get_buffered_bc(). 1271 * 1272 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1273 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1274 * 1275 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1276 * Hardware is not capable of receiving frames with short preamble on 1277 * the 2.4 GHz band. 1278 * 1279 * @IEEE80211_HW_SIGNAL_UNSPEC: 1280 * Hardware can provide signal values but we don't know its units. We 1281 * expect values between 0 and @max_signal. 1282 * If possible please provide dB or dBm instead. 1283 * 1284 * @IEEE80211_HW_SIGNAL_DBM: 1285 * Hardware gives signal values in dBm, decibel difference from 1286 * one milliwatt. This is the preferred method since it is standardized 1287 * between different devices. @max_signal does not need to be set. 1288 * 1289 * @IEEE80211_HW_SPECTRUM_MGMT: 1290 * Hardware supports spectrum management defined in 802.11h 1291 * Measurement, Channel Switch, Quieting, TPC 1292 * 1293 * @IEEE80211_HW_AMPDU_AGGREGATION: 1294 * Hardware supports 11n A-MPDU aggregation. 1295 * 1296 * @IEEE80211_HW_SUPPORTS_PS: 1297 * Hardware has power save support (i.e. can go to sleep). 1298 * 1299 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1300 * Hardware requires nullfunc frame handling in stack, implies 1301 * stack support for dynamic PS. 1302 * 1303 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1304 * Hardware has support for dynamic PS. 1305 * 1306 * @IEEE80211_HW_MFP_CAPABLE: 1307 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1308 * 1309 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1310 * Hardware supports static spatial multiplexing powersave, 1311 * ie. can turn off all but one chain even on HT connections 1312 * that should be using more chains. 1313 * 1314 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1315 * Hardware supports dynamic spatial multiplexing powersave, 1316 * ie. can turn off all but one chain and then wake the rest 1317 * up as required after, for example, rts/cts handshake. 1318 * 1319 * @IEEE80211_HW_SUPPORTS_UAPSD: 1320 * Hardware supports Unscheduled Automatic Power Save Delivery 1321 * (U-APSD) in managed mode. The mode is configured with 1322 * conf_tx() operation. 1323 * 1324 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1325 * Hardware can provide ack status reports of Tx frames to 1326 * the stack. 1327 * 1328 * @IEEE80211_HW_CONNECTION_MONITOR: 1329 * The hardware performs its own connection monitoring, including 1330 * periodic keep-alives to the AP and probing the AP on beacon loss. 1331 * When this flag is set, signaling beacon-loss will cause an immediate 1332 * change to disassociated state. 1333 * 1334 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1335 * This device needs to know the DTIM period for the BSS before 1336 * associating. 1337 * 1338 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1339 * per-station GTKs as used by IBSS RSN or during fast transition. If 1340 * the device doesn't support per-station GTKs, but can be asked not 1341 * to decrypt group addressed frames, then IBSS RSN support is still 1342 * possible but software crypto will be used. Advertise the wiphy flag 1343 * only in that case. 1344 * 1345 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1346 * autonomously manages the PS status of connected stations. When 1347 * this flag is set mac80211 will not trigger PS mode for connected 1348 * stations based on the PM bit of incoming frames. 1349 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1350 * the PS mode of connected stations. 1351 * 1352 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1353 * setup strictly in HW. mac80211 should not attempt to do this in 1354 * software. 1355 * 1356 * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while 1357 * being idle (i.e. mac80211 doesn't have to go idle-off during the 1358 * the scan). 1359 * 1360 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1361 * a virtual monitor interface when monitor interfaces are the only 1362 * active interfaces. 1363 * 1364 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1365 * queue mapping in order to use different queues (not just one per AC) 1366 * for different virtual interfaces. See the doc section on HW queue 1367 * control for more details. 1368 * 1369 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1370 * P2P Interface. This will be honoured even if more than one interface 1371 * is supported. 1372 * 1373 * @IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL: On this hardware TX BA session 1374 * should be tear down once BAR frame will not be acked. 1375 * 1376 */ 1377 enum ieee80211_hw_flags { 1378 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1379 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1380 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1381 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1382 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1383 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1384 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1385 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1386 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1387 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1388 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1389 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1390 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1391 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1392 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1393 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1394 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1395 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1396 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1397 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1398 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1399 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1400 IEEE80211_HW_AP_LINK_PS = 1<<22, 1401 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1402 IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, 1403 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1404 IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAIL = 1<<26, 1405 }; 1406 1407 /** 1408 * struct ieee80211_hw - hardware information and state 1409 * 1410 * This structure contains the configuration and hardware 1411 * information for an 802.11 PHY. 1412 * 1413 * @wiphy: This points to the &struct wiphy allocated for this 1414 * 802.11 PHY. You must fill in the @perm_addr and @dev 1415 * members of this structure using SET_IEEE80211_DEV() 1416 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1417 * bands (with channels, bitrates) are registered here. 1418 * 1419 * @conf: &struct ieee80211_conf, device configuration, don't use. 1420 * 1421 * @priv: pointer to private area that was allocated for driver use 1422 * along with this structure. 1423 * 1424 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1425 * 1426 * @extra_tx_headroom: headroom to reserve in each transmit skb 1427 * for use by the driver (e.g. for transmit headers.) 1428 * 1429 * @channel_change_time: time (in microseconds) it takes to change channels. 1430 * 1431 * @max_signal: Maximum value for signal (rssi) in RX information, used 1432 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1433 * 1434 * @max_listen_interval: max listen interval in units of beacon interval 1435 * that HW supports 1436 * 1437 * @queues: number of available hardware transmit queues for 1438 * data packets. WMM/QoS requires at least four, these 1439 * queues need to have configurable access parameters. 1440 * 1441 * @rate_control_algorithm: rate control algorithm for this hardware. 1442 * If unset (NULL), the default algorithm will be used. Must be 1443 * set before calling ieee80211_register_hw(). 1444 * 1445 * @vif_data_size: size (in bytes) of the drv_priv data area 1446 * within &struct ieee80211_vif. 1447 * @sta_data_size: size (in bytes) of the drv_priv data area 1448 * within &struct ieee80211_sta. 1449 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1450 * within &struct ieee80211_chanctx_conf. 1451 * 1452 * @max_rates: maximum number of alternate rate retry stages the hw 1453 * can handle. 1454 * @max_report_rates: maximum number of alternate rate retry stages 1455 * the hw can report back. 1456 * @max_rate_tries: maximum number of tries for each stage 1457 * 1458 * @napi_weight: weight used for NAPI polling. You must specify an 1459 * appropriate value here if a napi_poll operation is provided 1460 * by your driver. 1461 * 1462 * @max_rx_aggregation_subframes: maximum buffer size (number of 1463 * sub-frames) to be used for A-MPDU block ack receiver 1464 * aggregation. 1465 * This is only relevant if the device has restrictions on the 1466 * number of subframes, if it relies on mac80211 to do reordering 1467 * it shouldn't be set. 1468 * 1469 * @max_tx_aggregation_subframes: maximum number of subframes in an 1470 * aggregate an HT driver will transmit, used by the peer as a 1471 * hint to size its reorder buffer. 1472 * 1473 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1474 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1475 * 1476 * @radiotap_mcs_details: lists which MCS information can the HW 1477 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1478 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1479 * adding _BW is supported today. 1480 * 1481 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1482 * the default is _GI | _BANDWIDTH. 1483 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1484 * 1485 * @netdev_features: netdev features to be set in each netdev created 1486 * from this HW. Note only HW checksum features are currently 1487 * compatible with mac80211. Other feature bits will be rejected. 1488 */ 1489 struct ieee80211_hw { 1490 struct ieee80211_conf conf; 1491 struct wiphy *wiphy; 1492 const char *rate_control_algorithm; 1493 void *priv; 1494 u32 flags; 1495 unsigned int extra_tx_headroom; 1496 int channel_change_time; 1497 int vif_data_size; 1498 int sta_data_size; 1499 int chanctx_data_size; 1500 int napi_weight; 1501 u16 queues; 1502 u16 max_listen_interval; 1503 s8 max_signal; 1504 u8 max_rates; 1505 u8 max_report_rates; 1506 u8 max_rate_tries; 1507 u8 max_rx_aggregation_subframes; 1508 u8 max_tx_aggregation_subframes; 1509 u8 offchannel_tx_hw_queue; 1510 u8 radiotap_mcs_details; 1511 u16 radiotap_vht_details; 1512 netdev_features_t netdev_features; 1513 }; 1514 1515 /** 1516 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1517 * 1518 * @wiphy: the &struct wiphy which we want to query 1519 * 1520 * mac80211 drivers can use this to get to their respective 1521 * &struct ieee80211_hw. Drivers wishing to get to their own private 1522 * structure can then access it via hw->priv. Note that mac802111 drivers should 1523 * not use wiphy_priv() to try to get their private driver structure as this 1524 * is already used internally by mac80211. 1525 */ 1526 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1527 1528 /** 1529 * SET_IEEE80211_DEV - set device for 802.11 hardware 1530 * 1531 * @hw: the &struct ieee80211_hw to set the device for 1532 * @dev: the &struct device of this 802.11 device 1533 */ 1534 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1535 { 1536 set_wiphy_dev(hw->wiphy, dev); 1537 } 1538 1539 /** 1540 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1541 * 1542 * @hw: the &struct ieee80211_hw to set the MAC address for 1543 * @addr: the address to set 1544 */ 1545 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1546 { 1547 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1548 } 1549 1550 static inline struct ieee80211_rate * 1551 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1552 const struct ieee80211_tx_info *c) 1553 { 1554 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1555 return NULL; 1556 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1557 } 1558 1559 static inline struct ieee80211_rate * 1560 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1561 const struct ieee80211_tx_info *c) 1562 { 1563 if (c->control.rts_cts_rate_idx < 0) 1564 return NULL; 1565 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1566 } 1567 1568 static inline struct ieee80211_rate * 1569 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1570 const struct ieee80211_tx_info *c, int idx) 1571 { 1572 if (c->control.rates[idx + 1].idx < 0) 1573 return NULL; 1574 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1575 } 1576 1577 /** 1578 * ieee80211_free_txskb - free TX skb 1579 * @hw: the hardware 1580 * @skb: the skb 1581 * 1582 * Free a transmit skb. Use this funtion when some failure 1583 * to transmit happened and thus status cannot be reported. 1584 */ 1585 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1586 1587 /** 1588 * DOC: Hardware crypto acceleration 1589 * 1590 * mac80211 is capable of taking advantage of many hardware 1591 * acceleration designs for encryption and decryption operations. 1592 * 1593 * The set_key() callback in the &struct ieee80211_ops for a given 1594 * device is called to enable hardware acceleration of encryption and 1595 * decryption. The callback takes a @sta parameter that will be NULL 1596 * for default keys or keys used for transmission only, or point to 1597 * the station information for the peer for individual keys. 1598 * Multiple transmission keys with the same key index may be used when 1599 * VLANs are configured for an access point. 1600 * 1601 * When transmitting, the TX control data will use the @hw_key_idx 1602 * selected by the driver by modifying the &struct ieee80211_key_conf 1603 * pointed to by the @key parameter to the set_key() function. 1604 * 1605 * The set_key() call for the %SET_KEY command should return 0 if 1606 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1607 * added; if you return 0 then hw_key_idx must be assigned to the 1608 * hardware key index, you are free to use the full u8 range. 1609 * 1610 * When the cmd is %DISABLE_KEY then it must succeed. 1611 * 1612 * Note that it is permissible to not decrypt a frame even if a key 1613 * for it has been uploaded to hardware, the stack will not make any 1614 * decision based on whether a key has been uploaded or not but rather 1615 * based on the receive flags. 1616 * 1617 * The &struct ieee80211_key_conf structure pointed to by the @key 1618 * parameter is guaranteed to be valid until another call to set_key() 1619 * removes it, but it can only be used as a cookie to differentiate 1620 * keys. 1621 * 1622 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1623 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1624 * handler. 1625 * The update_tkip_key() call updates the driver with the new phase 1 key. 1626 * This happens every time the iv16 wraps around (every 65536 packets). The 1627 * set_key() call will happen only once for each key (unless the AP did 1628 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1629 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1630 * handler is software decryption with wrap around of iv16. 1631 */ 1632 1633 /** 1634 * DOC: Powersave support 1635 * 1636 * mac80211 has support for various powersave implementations. 1637 * 1638 * First, it can support hardware that handles all powersaving by itself, 1639 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1640 * flag. In that case, it will be told about the desired powersave mode 1641 * with the %IEEE80211_CONF_PS flag depending on the association status. 1642 * The hardware must take care of sending nullfunc frames when necessary, 1643 * i.e. when entering and leaving powersave mode. The hardware is required 1644 * to look at the AID in beacons and signal to the AP that it woke up when 1645 * it finds traffic directed to it. 1646 * 1647 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1648 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1649 * with hardware wakeup and sleep states. Driver is responsible for waking 1650 * up the hardware before issuing commands to the hardware and putting it 1651 * back to sleep at appropriate times. 1652 * 1653 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1654 * buffered multicast/broadcast frames after the beacon. Also it must be 1655 * possible to send frames and receive the acknowledment frame. 1656 * 1657 * Other hardware designs cannot send nullfunc frames by themselves and also 1658 * need software support for parsing the TIM bitmap. This is also supported 1659 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1660 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1661 * required to pass up beacons. The hardware is still required to handle 1662 * waking up for multicast traffic; if it cannot the driver must handle that 1663 * as best as it can, mac80211 is too slow to do that. 1664 * 1665 * Dynamic powersave is an extension to normal powersave in which the 1666 * hardware stays awake for a user-specified period of time after sending a 1667 * frame so that reply frames need not be buffered and therefore delayed to 1668 * the next wakeup. It's compromise of getting good enough latency when 1669 * there's data traffic and still saving significantly power in idle 1670 * periods. 1671 * 1672 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1673 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1674 * flag and mac80211 will handle everything automatically. Additionally, 1675 * hardware having support for the dynamic PS feature may set the 1676 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1677 * dynamic PS mode itself. The driver needs to look at the 1678 * @dynamic_ps_timeout hardware configuration value and use it that value 1679 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1680 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1681 * enabled whenever user has enabled powersave. 1682 * 1683 * Some hardware need to toggle a single shared antenna between WLAN and 1684 * Bluetooth to facilitate co-existence. These types of hardware set 1685 * limitations on the use of host controlled dynamic powersave whenever there 1686 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1687 * driver may request temporarily going into full power save, in order to 1688 * enable toggling the antenna between BT and WLAN. If the driver requests 1689 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1690 * temporarily set to zero until the driver re-enables dynamic powersave. 1691 * 1692 * Driver informs U-APSD client support by enabling 1693 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1694 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1695 * Nullfunc frames and stay awake until the service period has ended. To 1696 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1697 * from that AC are transmitted with powersave enabled. 1698 * 1699 * Note: U-APSD client mode is not yet supported with 1700 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1701 */ 1702 1703 /** 1704 * DOC: Beacon filter support 1705 * 1706 * Some hardware have beacon filter support to reduce host cpu wakeups 1707 * which will reduce system power consumption. It usually works so that 1708 * the firmware creates a checksum of the beacon but omits all constantly 1709 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1710 * beacon is forwarded to the host, otherwise it will be just dropped. That 1711 * way the host will only receive beacons where some relevant information 1712 * (for example ERP protection or WMM settings) have changed. 1713 * 1714 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1715 * interface capability. The driver needs to enable beacon filter support 1716 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1717 * power save is enabled, the stack will not check for beacon loss and the 1718 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1719 * 1720 * The time (or number of beacons missed) until the firmware notifies the 1721 * driver of a beacon loss event (which in turn causes the driver to call 1722 * ieee80211_beacon_loss()) should be configurable and will be controlled 1723 * by mac80211 and the roaming algorithm in the future. 1724 * 1725 * Since there may be constantly changing information elements that nothing 1726 * in the software stack cares about, we will, in the future, have mac80211 1727 * tell the driver which information elements are interesting in the sense 1728 * that we want to see changes in them. This will include 1729 * - a list of information element IDs 1730 * - a list of OUIs for the vendor information element 1731 * 1732 * Ideally, the hardware would filter out any beacons without changes in the 1733 * requested elements, but if it cannot support that it may, at the expense 1734 * of some efficiency, filter out only a subset. For example, if the device 1735 * doesn't support checking for OUIs it should pass up all changes in all 1736 * vendor information elements. 1737 * 1738 * Note that change, for the sake of simplification, also includes information 1739 * elements appearing or disappearing from the beacon. 1740 * 1741 * Some hardware supports an "ignore list" instead, just make sure nothing 1742 * that was requested is on the ignore list, and include commonly changing 1743 * information element IDs in the ignore list, for example 11 (BSS load) and 1744 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1745 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1746 * it could also include some currently unused IDs. 1747 * 1748 * 1749 * In addition to these capabilities, hardware should support notifying the 1750 * host of changes in the beacon RSSI. This is relevant to implement roaming 1751 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1752 * the received data packets). This can consist in notifying the host when 1753 * the RSSI changes significantly or when it drops below or rises above 1754 * configurable thresholds. In the future these thresholds will also be 1755 * configured by mac80211 (which gets them from userspace) to implement 1756 * them as the roaming algorithm requires. 1757 * 1758 * If the hardware cannot implement this, the driver should ask it to 1759 * periodically pass beacon frames to the host so that software can do the 1760 * signal strength threshold checking. 1761 */ 1762 1763 /** 1764 * DOC: Spatial multiplexing power save 1765 * 1766 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1767 * power in an 802.11n implementation. For details on the mechanism 1768 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1769 * "11.2.3 SM power save". 1770 * 1771 * The mac80211 implementation is capable of sending action frames 1772 * to update the AP about the station's SMPS mode, and will instruct 1773 * the driver to enter the specific mode. It will also announce the 1774 * requested SMPS mode during the association handshake. Hardware 1775 * support for this feature is required, and can be indicated by 1776 * hardware flags. 1777 * 1778 * The default mode will be "automatic", which nl80211/cfg80211 1779 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1780 * turned off otherwise. 1781 * 1782 * To support this feature, the driver must set the appropriate 1783 * hardware support flags, and handle the SMPS flag to the config() 1784 * operation. It will then with this mechanism be instructed to 1785 * enter the requested SMPS mode while associated to an HT AP. 1786 */ 1787 1788 /** 1789 * DOC: Frame filtering 1790 * 1791 * mac80211 requires to see many management frames for proper 1792 * operation, and users may want to see many more frames when 1793 * in monitor mode. However, for best CPU usage and power consumption, 1794 * having as few frames as possible percolate through the stack is 1795 * desirable. Hence, the hardware should filter as much as possible. 1796 * 1797 * To achieve this, mac80211 uses filter flags (see below) to tell 1798 * the driver's configure_filter() function which frames should be 1799 * passed to mac80211 and which should be filtered out. 1800 * 1801 * Before configure_filter() is invoked, the prepare_multicast() 1802 * callback is invoked with the parameters @mc_count and @mc_list 1803 * for the combined multicast address list of all virtual interfaces. 1804 * It's use is optional, and it returns a u64 that is passed to 1805 * configure_filter(). Additionally, configure_filter() has the 1806 * arguments @changed_flags telling which flags were changed and 1807 * @total_flags with the new flag states. 1808 * 1809 * If your device has no multicast address filters your driver will 1810 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1811 * parameter to see whether multicast frames should be accepted 1812 * or dropped. 1813 * 1814 * All unsupported flags in @total_flags must be cleared. 1815 * Hardware does not support a flag if it is incapable of _passing_ 1816 * the frame to the stack. Otherwise the driver must ignore 1817 * the flag, but not clear it. 1818 * You must _only_ clear the flag (announce no support for the 1819 * flag to mac80211) if you are not able to pass the packet type 1820 * to the stack (so the hardware always filters it). 1821 * So for example, you should clear @FIF_CONTROL, if your hardware 1822 * always filters control frames. If your hardware always passes 1823 * control frames to the kernel and is incapable of filtering them, 1824 * you do _not_ clear the @FIF_CONTROL flag. 1825 * This rule applies to all other FIF flags as well. 1826 */ 1827 1828 /** 1829 * DOC: AP support for powersaving clients 1830 * 1831 * In order to implement AP and P2P GO modes, mac80211 has support for 1832 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1833 * There currently is no support for sAPSD. 1834 * 1835 * There is one assumption that mac80211 makes, namely that a client 1836 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1837 * Both are supported, and both can be used by the same client, but 1838 * they can't be used concurrently by the same client. This simplifies 1839 * the driver code. 1840 * 1841 * The first thing to keep in mind is that there is a flag for complete 1842 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1843 * mac80211 expects the driver to handle most of the state machine for 1844 * powersaving clients and will ignore the PM bit in incoming frames. 1845 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1846 * stations' powersave transitions. In this mode, mac80211 also doesn't 1847 * handle PS-Poll/uAPSD. 1848 * 1849 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1850 * PM bit in incoming frames for client powersave transitions. When a 1851 * station goes to sleep, we will stop transmitting to it. There is, 1852 * however, a race condition: a station might go to sleep while there is 1853 * data buffered on hardware queues. If the device has support for this 1854 * it will reject frames, and the driver should give the frames back to 1855 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1856 * cause mac80211 to retry the frame when the station wakes up. The 1857 * driver is also notified of powersave transitions by calling its 1858 * @sta_notify callback. 1859 * 1860 * When the station is asleep, it has three choices: it can wake up, 1861 * it can PS-Poll, or it can possibly start a uAPSD service period. 1862 * Waking up is implemented by simply transmitting all buffered (and 1863 * filtered) frames to the station. This is the easiest case. When 1864 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1865 * will inform the driver of this with the @allow_buffered_frames 1866 * callback; this callback is optional. mac80211 will then transmit 1867 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1868 * on each frame. The last frame in the service period (or the only 1869 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1870 * indicate that it ends the service period; as this frame must have 1871 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1872 * When TX status is reported for this frame, the service period is 1873 * marked has having ended and a new one can be started by the peer. 1874 * 1875 * Additionally, non-bufferable MMPDUs can also be transmitted by 1876 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1877 * 1878 * Another race condition can happen on some devices like iwlwifi 1879 * when there are frames queued for the station and it wakes up 1880 * or polls; the frames that are already queued could end up being 1881 * transmitted first instead, causing reordering and/or wrong 1882 * processing of the EOSP. The cause is that allowing frames to be 1883 * transmitted to a certain station is out-of-band communication to 1884 * the device. To allow this problem to be solved, the driver can 1885 * call ieee80211_sta_block_awake() if frames are buffered when it 1886 * is notified that the station went to sleep. When all these frames 1887 * have been filtered (see above), it must call the function again 1888 * to indicate that the station is no longer blocked. 1889 * 1890 * If the driver buffers frames in the driver for aggregation in any 1891 * way, it must use the ieee80211_sta_set_buffered() call when it is 1892 * notified of the station going to sleep to inform mac80211 of any 1893 * TIDs that have frames buffered. Note that when a station wakes up 1894 * this information is reset (hence the requirement to call it when 1895 * informed of the station going to sleep). Then, when a service 1896 * period starts for any reason, @release_buffered_frames is called 1897 * with the number of frames to be released and which TIDs they are 1898 * to come from. In this case, the driver is responsible for setting 1899 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1900 * to help the @more_data paramter is passed to tell the driver if 1901 * there is more data on other TIDs -- the TIDs to release frames 1902 * from are ignored since mac80211 doesn't know how many frames the 1903 * buffers for those TIDs contain. 1904 * 1905 * If the driver also implement GO mode, where absence periods may 1906 * shorten service periods (or abort PS-Poll responses), it must 1907 * filter those response frames except in the case of frames that 1908 * are buffered in the driver -- those must remain buffered to avoid 1909 * reordering. Because it is possible that no frames are released 1910 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1911 * to indicate to mac80211 that the service period ended anyway. 1912 * 1913 * Finally, if frames from multiple TIDs are released from mac80211 1914 * but the driver might reorder them, it must clear & set the flags 1915 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1916 * and also take care of the EOSP and MORE_DATA bits in the frame. 1917 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1918 */ 1919 1920 /** 1921 * DOC: HW queue control 1922 * 1923 * Before HW queue control was introduced, mac80211 only had a single static 1924 * assignment of per-interface AC software queues to hardware queues. This 1925 * was problematic for a few reasons: 1926 * 1) off-channel transmissions might get stuck behind other frames 1927 * 2) multiple virtual interfaces couldn't be handled correctly 1928 * 3) after-DTIM frames could get stuck behind other frames 1929 * 1930 * To solve this, hardware typically uses multiple different queues for all 1931 * the different usages, and this needs to be propagated into mac80211 so it 1932 * won't have the same problem with the software queues. 1933 * 1934 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 1935 * flag that tells it that the driver implements its own queue control. To do 1936 * so, the driver will set up the various queues in each &struct ieee80211_vif 1937 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 1938 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 1939 * if necessary will queue the frame on the right software queue that mirrors 1940 * the hardware queue. 1941 * Additionally, the driver has to then use these HW queue IDs for the queue 1942 * management functions (ieee80211_stop_queue() et al.) 1943 * 1944 * The driver is free to set up the queue mappings as needed, multiple virtual 1945 * interfaces may map to the same hardware queues if needed. The setup has to 1946 * happen during add_interface or change_interface callbacks. For example, a 1947 * driver supporting station+station and station+AP modes might decide to have 1948 * 10 hardware queues to handle different scenarios: 1949 * 1950 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 1951 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 1952 * after-DTIM queue for AP: 8 1953 * off-channel queue: 9 1954 * 1955 * It would then set up the hardware like this: 1956 * hw.offchannel_tx_hw_queue = 9 1957 * 1958 * and the first virtual interface that is added as follows: 1959 * vif.hw_queue[IEEE80211_AC_VO] = 0 1960 * vif.hw_queue[IEEE80211_AC_VI] = 1 1961 * vif.hw_queue[IEEE80211_AC_BE] = 2 1962 * vif.hw_queue[IEEE80211_AC_BK] = 3 1963 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 1964 * and the second virtual interface with 4-7. 1965 * 1966 * If queue 6 gets full, for example, mac80211 would only stop the second 1967 * virtual interface's BE queue since virtual interface queues are per AC. 1968 * 1969 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 1970 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 1971 * queue could potentially be shared since mac80211 will look at cab_queue when 1972 * a queue is stopped/woken even if the interface is not in AP mode. 1973 */ 1974 1975 /** 1976 * enum ieee80211_filter_flags - hardware filter flags 1977 * 1978 * These flags determine what the filter in hardware should be 1979 * programmed to let through and what should not be passed to the 1980 * stack. It is always safe to pass more frames than requested, 1981 * but this has negative impact on power consumption. 1982 * 1983 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1984 * think of the BSS as your network segment and then this corresponds 1985 * to the regular ethernet device promiscuous mode. 1986 * 1987 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1988 * by the user or if the hardware is not capable of filtering by 1989 * multicast address. 1990 * 1991 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1992 * %RX_FLAG_FAILED_FCS_CRC for them) 1993 * 1994 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1995 * the %RX_FLAG_FAILED_PLCP_CRC for them 1996 * 1997 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1998 * to the hardware that it should not filter beacons or probe responses 1999 * by BSSID. Filtering them can greatly reduce the amount of processing 2000 * mac80211 needs to do and the amount of CPU wakeups, so you should 2001 * honour this flag if possible. 2002 * 2003 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2004 * is not set then only those addressed to this station. 2005 * 2006 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2007 * 2008 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2009 * those addressed to this station. 2010 * 2011 * @FIF_PROBE_REQ: pass probe request frames 2012 */ 2013 enum ieee80211_filter_flags { 2014 FIF_PROMISC_IN_BSS = 1<<0, 2015 FIF_ALLMULTI = 1<<1, 2016 FIF_FCSFAIL = 1<<2, 2017 FIF_PLCPFAIL = 1<<3, 2018 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2019 FIF_CONTROL = 1<<5, 2020 FIF_OTHER_BSS = 1<<6, 2021 FIF_PSPOLL = 1<<7, 2022 FIF_PROBE_REQ = 1<<8, 2023 }; 2024 2025 /** 2026 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2027 * 2028 * These flags are used with the ampdu_action() callback in 2029 * &struct ieee80211_ops to indicate which action is needed. 2030 * 2031 * Note that drivers MUST be able to deal with a TX aggregation 2032 * session being stopped even before they OK'ed starting it by 2033 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2034 * might receive the addBA frame and send a delBA right away! 2035 * 2036 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 2037 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 2038 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 2039 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 2040 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2041 */ 2042 enum ieee80211_ampdu_mlme_action { 2043 IEEE80211_AMPDU_RX_START, 2044 IEEE80211_AMPDU_RX_STOP, 2045 IEEE80211_AMPDU_TX_START, 2046 IEEE80211_AMPDU_TX_STOP, 2047 IEEE80211_AMPDU_TX_OPERATIONAL, 2048 }; 2049 2050 /** 2051 * enum ieee80211_frame_release_type - frame release reason 2052 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2053 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2054 * frame received on trigger-enabled AC 2055 */ 2056 enum ieee80211_frame_release_type { 2057 IEEE80211_FRAME_RELEASE_PSPOLL, 2058 IEEE80211_FRAME_RELEASE_UAPSD, 2059 }; 2060 2061 /** 2062 * enum ieee80211_rate_control_changed - flags to indicate what changed 2063 * 2064 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2065 * to this station changed. 2066 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2067 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2068 * changed (in IBSS mode) due to discovering more information about 2069 * the peer. 2070 */ 2071 enum ieee80211_rate_control_changed { 2072 IEEE80211_RC_BW_CHANGED = BIT(0), 2073 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2074 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2075 }; 2076 2077 /** 2078 * struct ieee80211_ops - callbacks from mac80211 to the driver 2079 * 2080 * This structure contains various callbacks that the driver may 2081 * handle or, in some cases, must handle, for example to configure 2082 * the hardware to a new channel or to transmit a frame. 2083 * 2084 * @tx: Handler that 802.11 module calls for each transmitted frame. 2085 * skb contains the buffer starting from the IEEE 802.11 header. 2086 * The low-level driver should send the frame out based on 2087 * configuration in the TX control data. This handler should, 2088 * preferably, never fail and stop queues appropriately. 2089 * Must be atomic. 2090 * 2091 * @start: Called before the first netdevice attached to the hardware 2092 * is enabled. This should turn on the hardware and must turn on 2093 * frame reception (for possibly enabled monitor interfaces.) 2094 * Returns negative error codes, these may be seen in userspace, 2095 * or zero. 2096 * When the device is started it should not have a MAC address 2097 * to avoid acknowledging frames before a non-monitor device 2098 * is added. 2099 * Must be implemented and can sleep. 2100 * 2101 * @stop: Called after last netdevice attached to the hardware 2102 * is disabled. This should turn off the hardware (at least 2103 * it must turn off frame reception.) 2104 * May be called right after add_interface if that rejects 2105 * an interface. If you added any work onto the mac80211 workqueue 2106 * you should ensure to cancel it on this callback. 2107 * Must be implemented and can sleep. 2108 * 2109 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2110 * stop transmitting and doing any other configuration, and then 2111 * ask the device to suspend. This is only invoked when WoWLAN is 2112 * configured, otherwise the device is deconfigured completely and 2113 * reconfigured at resume time. 2114 * The driver may also impose special conditions under which it 2115 * wants to use the "normal" suspend (deconfigure), say if it only 2116 * supports WoWLAN when the device is associated. In this case, it 2117 * must return 1 from this function. 2118 * 2119 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2120 * now resuming its operation, after this the device must be fully 2121 * functional again. If this returns an error, the only way out is 2122 * to also unregister the device. If it returns 1, then mac80211 2123 * will also go through the regular complete restart on resume. 2124 * 2125 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2126 * modified. The reason is that device_set_wakeup_enable() is 2127 * supposed to be called when the configuration changes, not only 2128 * in suspend(). 2129 * 2130 * @add_interface: Called when a netdevice attached to the hardware is 2131 * enabled. Because it is not called for monitor mode devices, @start 2132 * and @stop must be implemented. 2133 * The driver should perform any initialization it needs before 2134 * the device can be enabled. The initial configuration for the 2135 * interface is given in the conf parameter. 2136 * The callback may refuse to add an interface by returning a 2137 * negative error code (which will be seen in userspace.) 2138 * Must be implemented and can sleep. 2139 * 2140 * @change_interface: Called when a netdevice changes type. This callback 2141 * is optional, but only if it is supported can interface types be 2142 * switched while the interface is UP. The callback may sleep. 2143 * Note that while an interface is being switched, it will not be 2144 * found by the interface iteration callbacks. 2145 * 2146 * @remove_interface: Notifies a driver that an interface is going down. 2147 * The @stop callback is called after this if it is the last interface 2148 * and no monitor interfaces are present. 2149 * When all interfaces are removed, the MAC address in the hardware 2150 * must be cleared so the device no longer acknowledges packets, 2151 * the mac_addr member of the conf structure is, however, set to the 2152 * MAC address of the device going away. 2153 * Hence, this callback must be implemented. It can sleep. 2154 * 2155 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2156 * function to change hardware configuration, e.g., channel. 2157 * This function should never fail but returns a negative error code 2158 * if it does. The callback can sleep. 2159 * 2160 * @bss_info_changed: Handler for configuration requests related to BSS 2161 * parameters that may vary during BSS's lifespan, and may affect low 2162 * level driver (e.g. assoc/disassoc status, erp parameters). 2163 * This function should not be used if no BSS has been set, unless 2164 * for association indication. The @changed parameter indicates which 2165 * of the bss parameters has changed when a call is made. The callback 2166 * can sleep. 2167 * 2168 * @prepare_multicast: Prepare for multicast filter configuration. 2169 * This callback is optional, and its return value is passed 2170 * to configure_filter(). This callback must be atomic. 2171 * 2172 * @configure_filter: Configure the device's RX filter. 2173 * See the section "Frame filtering" for more information. 2174 * This callback must be implemented and can sleep. 2175 * 2176 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2177 * must be set or cleared for a given STA. Must be atomic. 2178 * 2179 * @set_key: See the section "Hardware crypto acceleration" 2180 * This callback is only called between add_interface and 2181 * remove_interface calls, i.e. while the given virtual interface 2182 * is enabled. 2183 * Returns a negative error code if the key can't be added. 2184 * The callback can sleep. 2185 * 2186 * @update_tkip_key: See the section "Hardware crypto acceleration" 2187 * This callback will be called in the context of Rx. Called for drivers 2188 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2189 * The callback must be atomic. 2190 * 2191 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2192 * host is suspended, it can assign this callback to retrieve the data 2193 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2194 * After rekeying was done it should (for example during resume) notify 2195 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2196 * 2197 * @hw_scan: Ask the hardware to service the scan request, no need to start 2198 * the scan state machine in stack. The scan must honour the channel 2199 * configuration done by the regulatory agent in the wiphy's 2200 * registered bands. The hardware (or the driver) needs to make sure 2201 * that power save is disabled. 2202 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2203 * entire IEs after the SSID, so that drivers need not look at these 2204 * at all but just send them after the SSID -- mac80211 includes the 2205 * (extended) supported rates and HT information (where applicable). 2206 * When the scan finishes, ieee80211_scan_completed() must be called; 2207 * note that it also must be called when the scan cannot finish due to 2208 * any error unless this callback returned a negative error code. 2209 * The callback can sleep. 2210 * 2211 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2212 * The driver should ask the hardware to cancel the scan (if possible), 2213 * but the scan will be completed only after the driver will call 2214 * ieee80211_scan_completed(). 2215 * This callback is needed for wowlan, to prevent enqueueing a new 2216 * scan_work after the low-level driver was already suspended. 2217 * The callback can sleep. 2218 * 2219 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2220 * specific intervals. The driver must call the 2221 * ieee80211_sched_scan_results() function whenever it finds results. 2222 * This process will continue until sched_scan_stop is called. 2223 * 2224 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2225 * 2226 * @sw_scan_start: Notifier function that is called just before a software scan 2227 * is started. Can be NULL, if the driver doesn't need this notification. 2228 * The callback can sleep. 2229 * 2230 * @sw_scan_complete: Notifier function that is called just after a 2231 * software scan finished. Can be NULL, if the driver doesn't need 2232 * this notification. 2233 * The callback can sleep. 2234 * 2235 * @get_stats: Return low-level statistics. 2236 * Returns zero if statistics are available. 2237 * The callback can sleep. 2238 * 2239 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2240 * callback should be provided to read the TKIP transmit IVs (both IV32 2241 * and IV16) for the given key from hardware. 2242 * The callback must be atomic. 2243 * 2244 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2245 * if the device does fragmentation by itself; if this callback is 2246 * implemented then the stack will not do fragmentation. 2247 * The callback can sleep. 2248 * 2249 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2250 * The callback can sleep. 2251 * 2252 * @sta_add: Notifies low level driver about addition of an associated station, 2253 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2254 * 2255 * @sta_remove: Notifies low level driver about removal of an associated 2256 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2257 * 2258 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2259 * when a station is added to mac80211's station list. This callback 2260 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2261 * conditional. This callback can sleep. 2262 * 2263 * @sta_remove_debugfs: Remove the debugfs files which were added using 2264 * @sta_add_debugfs. This callback can sleep. 2265 * 2266 * @sta_notify: Notifies low level driver about power state transition of an 2267 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2268 * in AP mode, this callback will not be called when the flag 2269 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2270 * 2271 * @sta_state: Notifies low level driver about state transition of a 2272 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2273 * This callback is mutually exclusive with @sta_add/@sta_remove. 2274 * It must not fail for down transitions but may fail for transitions 2275 * up the list of states. 2276 * The callback can sleep. 2277 * 2278 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2279 * used to transmit to the station. The changes are advertised with bits 2280 * from &enum ieee80211_rate_control_changed and the values are reflected 2281 * in the station data. This callback should only be used when the driver 2282 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2283 * otherwise the rate control algorithm is notified directly. 2284 * Must be atomic. 2285 * 2286 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2287 * bursting) for a hardware TX queue. 2288 * Returns a negative error code on failure. 2289 * The callback can sleep. 2290 * 2291 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2292 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2293 * required function. 2294 * The callback can sleep. 2295 * 2296 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2297 * Currently, this is only used for IBSS mode debugging. Is not a 2298 * required function. 2299 * The callback can sleep. 2300 * 2301 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2302 * with other STAs in the IBSS. This is only used in IBSS mode. This 2303 * function is optional if the firmware/hardware takes full care of 2304 * TSF synchronization. 2305 * The callback can sleep. 2306 * 2307 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2308 * This is needed only for IBSS mode and the result of this function is 2309 * used to determine whether to reply to Probe Requests. 2310 * Returns non-zero if this device sent the last beacon. 2311 * The callback can sleep. 2312 * 2313 * @ampdu_action: Perform a certain A-MPDU action 2314 * The RA/TID combination determines the destination and TID we want 2315 * the ampdu action to be performed for. The action is defined through 2316 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2317 * is the first frame we expect to perform the action on. Notice 2318 * that TX/RX_STOP can pass NULL for this parameter. 2319 * The @buf_size parameter is only valid when the action is set to 2320 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2321 * buffer size (number of subframes) for this session -- the driver 2322 * may neither send aggregates containing more subframes than this 2323 * nor send aggregates in a way that lost frames would exceed the 2324 * buffer size. If just limiting the aggregate size, this would be 2325 * possible with a buf_size of 8: 2326 * - TX: 1.....7 2327 * - RX: 2....7 (lost frame #1) 2328 * - TX: 8..1... 2329 * which is invalid since #1 was now re-transmitted well past the 2330 * buffer size of 8. Correct ways to retransmit #1 would be: 2331 * - TX: 1 or 18 or 81 2332 * Even "189" would be wrong since 1 could be lost again. 2333 * 2334 * Returns a negative error code on failure. 2335 * The callback can sleep. 2336 * 2337 * @get_survey: Return per-channel survey information 2338 * 2339 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2340 * need to set wiphy->rfkill_poll to %true before registration, 2341 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2342 * The callback can sleep. 2343 * 2344 * @set_coverage_class: Set slot time for given coverage class as specified 2345 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2346 * accordingly. This callback is not required and may sleep. 2347 * 2348 * @testmode_cmd: Implement a cfg80211 test mode command. 2349 * The callback can sleep. 2350 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2351 * 2352 * @flush: Flush all pending frames from the hardware queue, making sure 2353 * that the hardware queues are empty. If the parameter @drop is set 2354 * to %true, pending frames may be dropped. The callback can sleep. 2355 * 2356 * @channel_switch: Drivers that need (or want) to offload the channel 2357 * switch operation for CSAs received from the AP may implement this 2358 * callback. They must then call ieee80211_chswitch_done() to indicate 2359 * completion of the channel switch. 2360 * 2361 * @napi_poll: Poll Rx queue for incoming data frames. 2362 * 2363 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2364 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2365 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2366 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2367 * 2368 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2369 * 2370 * @remain_on_channel: Starts an off-channel period on the given channel, must 2371 * call back to ieee80211_ready_on_channel() when on that channel. Note 2372 * that normal channel traffic is not stopped as this is intended for hw 2373 * offload. Frames to transmit on the off-channel channel are transmitted 2374 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2375 * duration (which will always be non-zero) expires, the driver must call 2376 * ieee80211_remain_on_channel_expired(). 2377 * Note that this callback may be called while the device is in IDLE and 2378 * must be accepted in this case. 2379 * This callback may sleep. 2380 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2381 * aborted before it expires. This callback may sleep. 2382 * 2383 * @set_ringparam: Set tx and rx ring sizes. 2384 * 2385 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2386 * 2387 * @tx_frames_pending: Check if there is any pending frame in the hardware 2388 * queues before entering power save. 2389 * 2390 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2391 * when transmitting a frame. Currently only legacy rates are handled. 2392 * The callback can sleep. 2393 * @rssi_callback: Notify driver when the average RSSI goes above/below 2394 * thresholds that were registered previously. The callback can sleep. 2395 * 2396 * @release_buffered_frames: Release buffered frames according to the given 2397 * parameters. In the case where the driver buffers some frames for 2398 * sleeping stations mac80211 will use this callback to tell the driver 2399 * to release some frames, either for PS-poll or uAPSD. 2400 * Note that if the @more_data paramter is %false the driver must check 2401 * if there are more frames on the given TIDs, and if there are more than 2402 * the frames being released then it must still set the more-data bit in 2403 * the frame. If the @more_data parameter is %true, then of course the 2404 * more-data bit must always be set. 2405 * The @tids parameter tells the driver which TIDs to release frames 2406 * from, for PS-poll it will always have only a single bit set. 2407 * In the case this is used for a PS-poll initiated release, the 2408 * @num_frames parameter will always be 1 so code can be shared. In 2409 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2410 * on the TX status (and must report TX status) so that the PS-poll 2411 * period is properly ended. This is used to avoid sending multiple 2412 * responses for a retried PS-poll frame. 2413 * In the case this is used for uAPSD, the @num_frames parameter may be 2414 * bigger than one, but the driver may send fewer frames (it must send 2415 * at least one, however). In this case it is also responsible for 2416 * setting the EOSP flag in the QoS header of the frames. Also, when the 2417 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2418 * on the last frame in the SP. Alternatively, it may call the function 2419 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2420 * This callback must be atomic. 2421 * @allow_buffered_frames: Prepare device to allow the given number of frames 2422 * to go out to the given station. The frames will be sent by mac80211 2423 * via the usual TX path after this call. The TX information for frames 2424 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2425 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2426 * frames from multiple TIDs are released and the driver might reorder 2427 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2428 * on the last frame and clear it on all others and also handle the EOSP 2429 * bit in the QoS header correctly. Alternatively, it can also call the 2430 * ieee80211_sta_eosp_irqsafe() function. 2431 * The @tids parameter is a bitmap and tells the driver which TIDs the 2432 * frames will be on; it will at most have two bits set. 2433 * This callback must be atomic. 2434 * 2435 * @get_et_sset_count: Ethtool API to get string-set count. 2436 * 2437 * @get_et_stats: Ethtool API to get a set of u64 stats. 2438 * 2439 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2440 * and perhaps other supported types of ethtool data-sets. 2441 * 2442 * @get_rssi: Get current signal strength in dBm, the function is optional 2443 * and can sleep. 2444 * 2445 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2446 * before associated. In multi-channel scenarios, a virtual interface is 2447 * bound to a channel before it is associated, but as it isn't associated 2448 * yet it need not necessarily be given airtime, in particular since any 2449 * transmission to a P2P GO needs to be synchronized against the GO's 2450 * powersave state. mac80211 will call this function before transmitting a 2451 * management frame prior to having successfully associated to allow the 2452 * driver to give it channel time for the transmission, to get a response 2453 * and to be able to synchronize with the GO. 2454 * The callback will be called before each transmission and upon return 2455 * mac80211 will transmit the frame right away. 2456 * The callback is optional and can (should!) sleep. 2457 * 2458 * @add_chanctx: Notifies device driver about new channel context creation. 2459 * @remove_chanctx: Notifies device driver about channel context destruction. 2460 * @change_chanctx: Notifies device driver about channel context changes that 2461 * may happen when combining different virtual interfaces on the same 2462 * channel context with different settings 2463 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2464 * to vif. Possible use is for hw queue remapping. 2465 * @unassign_vif_chanctx: Notifies device driver about channel context being 2466 * unbound from vif. 2467 * @start_ap: Start operation on the AP interface, this is called after all the 2468 * information in bss_conf is set and beacon can be retrieved. A channel 2469 * context is bound before this is called. Note that if the driver uses 2470 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2471 * just "paused" for scanning/ROC, which is indicated by the beacon being 2472 * disabled/enabled via @bss_info_changed. 2473 * @stop_ap: Stop operation on the AP interface. 2474 * 2475 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2476 * reconfiguration has completed. This can help the driver implement the 2477 * reconfiguration step. This callback may sleep. 2478 */ 2479 struct ieee80211_ops { 2480 void (*tx)(struct ieee80211_hw *hw, 2481 struct ieee80211_tx_control *control, 2482 struct sk_buff *skb); 2483 int (*start)(struct ieee80211_hw *hw); 2484 void (*stop)(struct ieee80211_hw *hw); 2485 #ifdef CONFIG_PM 2486 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2487 int (*resume)(struct ieee80211_hw *hw); 2488 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2489 #endif 2490 int (*add_interface)(struct ieee80211_hw *hw, 2491 struct ieee80211_vif *vif); 2492 int (*change_interface)(struct ieee80211_hw *hw, 2493 struct ieee80211_vif *vif, 2494 enum nl80211_iftype new_type, bool p2p); 2495 void (*remove_interface)(struct ieee80211_hw *hw, 2496 struct ieee80211_vif *vif); 2497 int (*config)(struct ieee80211_hw *hw, u32 changed); 2498 void (*bss_info_changed)(struct ieee80211_hw *hw, 2499 struct ieee80211_vif *vif, 2500 struct ieee80211_bss_conf *info, 2501 u32 changed); 2502 2503 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2504 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2505 2506 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2507 struct netdev_hw_addr_list *mc_list); 2508 void (*configure_filter)(struct ieee80211_hw *hw, 2509 unsigned int changed_flags, 2510 unsigned int *total_flags, 2511 u64 multicast); 2512 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2513 bool set); 2514 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2515 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2516 struct ieee80211_key_conf *key); 2517 void (*update_tkip_key)(struct ieee80211_hw *hw, 2518 struct ieee80211_vif *vif, 2519 struct ieee80211_key_conf *conf, 2520 struct ieee80211_sta *sta, 2521 u32 iv32, u16 *phase1key); 2522 void (*set_rekey_data)(struct ieee80211_hw *hw, 2523 struct ieee80211_vif *vif, 2524 struct cfg80211_gtk_rekey_data *data); 2525 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2526 struct cfg80211_scan_request *req); 2527 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2528 struct ieee80211_vif *vif); 2529 int (*sched_scan_start)(struct ieee80211_hw *hw, 2530 struct ieee80211_vif *vif, 2531 struct cfg80211_sched_scan_request *req, 2532 struct ieee80211_sched_scan_ies *ies); 2533 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2534 struct ieee80211_vif *vif); 2535 void (*sw_scan_start)(struct ieee80211_hw *hw); 2536 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2537 int (*get_stats)(struct ieee80211_hw *hw, 2538 struct ieee80211_low_level_stats *stats); 2539 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2540 u32 *iv32, u16 *iv16); 2541 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2542 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2543 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2544 struct ieee80211_sta *sta); 2545 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2546 struct ieee80211_sta *sta); 2547 #ifdef CONFIG_MAC80211_DEBUGFS 2548 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2549 struct ieee80211_vif *vif, 2550 struct ieee80211_sta *sta, 2551 struct dentry *dir); 2552 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2553 struct ieee80211_vif *vif, 2554 struct ieee80211_sta *sta, 2555 struct dentry *dir); 2556 #endif 2557 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2558 enum sta_notify_cmd, struct ieee80211_sta *sta); 2559 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2560 struct ieee80211_sta *sta, 2561 enum ieee80211_sta_state old_state, 2562 enum ieee80211_sta_state new_state); 2563 void (*sta_rc_update)(struct ieee80211_hw *hw, 2564 struct ieee80211_vif *vif, 2565 struct ieee80211_sta *sta, 2566 u32 changed); 2567 int (*conf_tx)(struct ieee80211_hw *hw, 2568 struct ieee80211_vif *vif, u16 ac, 2569 const struct ieee80211_tx_queue_params *params); 2570 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2571 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2572 u64 tsf); 2573 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2574 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2575 int (*ampdu_action)(struct ieee80211_hw *hw, 2576 struct ieee80211_vif *vif, 2577 enum ieee80211_ampdu_mlme_action action, 2578 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2579 u8 buf_size); 2580 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2581 struct survey_info *survey); 2582 void (*rfkill_poll)(struct ieee80211_hw *hw); 2583 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2584 #ifdef CONFIG_NL80211_TESTMODE 2585 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2586 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2587 struct netlink_callback *cb, 2588 void *data, int len); 2589 #endif 2590 void (*flush)(struct ieee80211_hw *hw, bool drop); 2591 void (*channel_switch)(struct ieee80211_hw *hw, 2592 struct ieee80211_channel_switch *ch_switch); 2593 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2594 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2595 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2596 2597 int (*remain_on_channel)(struct ieee80211_hw *hw, 2598 struct ieee80211_vif *vif, 2599 struct ieee80211_channel *chan, 2600 int duration); 2601 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2602 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2603 void (*get_ringparam)(struct ieee80211_hw *hw, 2604 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2605 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2606 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2607 const struct cfg80211_bitrate_mask *mask); 2608 void (*rssi_callback)(struct ieee80211_hw *hw, 2609 enum ieee80211_rssi_event rssi_event); 2610 2611 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2612 struct ieee80211_sta *sta, 2613 u16 tids, int num_frames, 2614 enum ieee80211_frame_release_type reason, 2615 bool more_data); 2616 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2617 struct ieee80211_sta *sta, 2618 u16 tids, int num_frames, 2619 enum ieee80211_frame_release_type reason, 2620 bool more_data); 2621 2622 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2623 struct ieee80211_vif *vif, int sset); 2624 void (*get_et_stats)(struct ieee80211_hw *hw, 2625 struct ieee80211_vif *vif, 2626 struct ethtool_stats *stats, u64 *data); 2627 void (*get_et_strings)(struct ieee80211_hw *hw, 2628 struct ieee80211_vif *vif, 2629 u32 sset, u8 *data); 2630 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2631 struct ieee80211_sta *sta, s8 *rssi_dbm); 2632 2633 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2634 struct ieee80211_vif *vif); 2635 2636 int (*add_chanctx)(struct ieee80211_hw *hw, 2637 struct ieee80211_chanctx_conf *ctx); 2638 void (*remove_chanctx)(struct ieee80211_hw *hw, 2639 struct ieee80211_chanctx_conf *ctx); 2640 void (*change_chanctx)(struct ieee80211_hw *hw, 2641 struct ieee80211_chanctx_conf *ctx, 2642 u32 changed); 2643 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2644 struct ieee80211_vif *vif, 2645 struct ieee80211_chanctx_conf *ctx); 2646 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2647 struct ieee80211_vif *vif, 2648 struct ieee80211_chanctx_conf *ctx); 2649 2650 void (*restart_complete)(struct ieee80211_hw *hw); 2651 }; 2652 2653 /** 2654 * ieee80211_alloc_hw - Allocate a new hardware device 2655 * 2656 * This must be called once for each hardware device. The returned pointer 2657 * must be used to refer to this device when calling other functions. 2658 * mac80211 allocates a private data area for the driver pointed to by 2659 * @priv in &struct ieee80211_hw, the size of this area is given as 2660 * @priv_data_len. 2661 * 2662 * @priv_data_len: length of private data 2663 * @ops: callbacks for this device 2664 */ 2665 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2666 const struct ieee80211_ops *ops); 2667 2668 /** 2669 * ieee80211_register_hw - Register hardware device 2670 * 2671 * You must call this function before any other functions in 2672 * mac80211. Note that before a hardware can be registered, you 2673 * need to fill the contained wiphy's information. 2674 * 2675 * @hw: the device to register as returned by ieee80211_alloc_hw() 2676 */ 2677 int ieee80211_register_hw(struct ieee80211_hw *hw); 2678 2679 /** 2680 * struct ieee80211_tpt_blink - throughput blink description 2681 * @throughput: throughput in Kbit/sec 2682 * @blink_time: blink time in milliseconds 2683 * (full cycle, ie. one off + one on period) 2684 */ 2685 struct ieee80211_tpt_blink { 2686 int throughput; 2687 int blink_time; 2688 }; 2689 2690 /** 2691 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2692 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2693 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2694 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2695 * interface is connected in some way, including being an AP 2696 */ 2697 enum ieee80211_tpt_led_trigger_flags { 2698 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2699 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2700 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2701 }; 2702 2703 #ifdef CONFIG_MAC80211_LEDS 2704 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2705 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2706 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2707 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2708 extern char *__ieee80211_create_tpt_led_trigger( 2709 struct ieee80211_hw *hw, unsigned int flags, 2710 const struct ieee80211_tpt_blink *blink_table, 2711 unsigned int blink_table_len); 2712 #endif 2713 /** 2714 * ieee80211_get_tx_led_name - get name of TX LED 2715 * 2716 * mac80211 creates a transmit LED trigger for each wireless hardware 2717 * that can be used to drive LEDs if your driver registers a LED device. 2718 * This function returns the name (or %NULL if not configured for LEDs) 2719 * of the trigger so you can automatically link the LED device. 2720 * 2721 * @hw: the hardware to get the LED trigger name for 2722 */ 2723 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2724 { 2725 #ifdef CONFIG_MAC80211_LEDS 2726 return __ieee80211_get_tx_led_name(hw); 2727 #else 2728 return NULL; 2729 #endif 2730 } 2731 2732 /** 2733 * ieee80211_get_rx_led_name - get name of RX LED 2734 * 2735 * mac80211 creates a receive LED trigger for each wireless hardware 2736 * that can be used to drive LEDs if your driver registers a LED device. 2737 * This function returns the name (or %NULL if not configured for LEDs) 2738 * of the trigger so you can automatically link the LED device. 2739 * 2740 * @hw: the hardware to get the LED trigger name for 2741 */ 2742 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2743 { 2744 #ifdef CONFIG_MAC80211_LEDS 2745 return __ieee80211_get_rx_led_name(hw); 2746 #else 2747 return NULL; 2748 #endif 2749 } 2750 2751 /** 2752 * ieee80211_get_assoc_led_name - get name of association LED 2753 * 2754 * mac80211 creates a association LED trigger for each wireless hardware 2755 * that can be used to drive LEDs if your driver registers a LED device. 2756 * This function returns the name (or %NULL if not configured for LEDs) 2757 * of the trigger so you can automatically link the LED device. 2758 * 2759 * @hw: the hardware to get the LED trigger name for 2760 */ 2761 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2762 { 2763 #ifdef CONFIG_MAC80211_LEDS 2764 return __ieee80211_get_assoc_led_name(hw); 2765 #else 2766 return NULL; 2767 #endif 2768 } 2769 2770 /** 2771 * ieee80211_get_radio_led_name - get name of radio LED 2772 * 2773 * mac80211 creates a radio change LED trigger for each wireless hardware 2774 * that can be used to drive LEDs if your driver registers a LED device. 2775 * This function returns the name (or %NULL if not configured for LEDs) 2776 * of the trigger so you can automatically link the LED device. 2777 * 2778 * @hw: the hardware to get the LED trigger name for 2779 */ 2780 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2781 { 2782 #ifdef CONFIG_MAC80211_LEDS 2783 return __ieee80211_get_radio_led_name(hw); 2784 #else 2785 return NULL; 2786 #endif 2787 } 2788 2789 /** 2790 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2791 * @hw: the hardware to create the trigger for 2792 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2793 * @blink_table: the blink table -- needs to be ordered by throughput 2794 * @blink_table_len: size of the blink table 2795 * 2796 * This function returns %NULL (in case of error, or if no LED 2797 * triggers are configured) or the name of the new trigger. 2798 * This function must be called before ieee80211_register_hw(). 2799 */ 2800 static inline char * 2801 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2802 const struct ieee80211_tpt_blink *blink_table, 2803 unsigned int blink_table_len) 2804 { 2805 #ifdef CONFIG_MAC80211_LEDS 2806 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2807 blink_table_len); 2808 #else 2809 return NULL; 2810 #endif 2811 } 2812 2813 /** 2814 * ieee80211_unregister_hw - Unregister a hardware device 2815 * 2816 * This function instructs mac80211 to free allocated resources 2817 * and unregister netdevices from the networking subsystem. 2818 * 2819 * @hw: the hardware to unregister 2820 */ 2821 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2822 2823 /** 2824 * ieee80211_free_hw - free hardware descriptor 2825 * 2826 * This function frees everything that was allocated, including the 2827 * private data for the driver. You must call ieee80211_unregister_hw() 2828 * before calling this function. 2829 * 2830 * @hw: the hardware to free 2831 */ 2832 void ieee80211_free_hw(struct ieee80211_hw *hw); 2833 2834 /** 2835 * ieee80211_restart_hw - restart hardware completely 2836 * 2837 * Call this function when the hardware was restarted for some reason 2838 * (hardware error, ...) and the driver is unable to restore its state 2839 * by itself. mac80211 assumes that at this point the driver/hardware 2840 * is completely uninitialised and stopped, it starts the process by 2841 * calling the ->start() operation. The driver will need to reset all 2842 * internal state that it has prior to calling this function. 2843 * 2844 * @hw: the hardware to restart 2845 */ 2846 void ieee80211_restart_hw(struct ieee80211_hw *hw); 2847 2848 /** ieee80211_napi_schedule - schedule NAPI poll 2849 * 2850 * Use this function to schedule NAPI polling on a device. 2851 * 2852 * @hw: the hardware to start polling 2853 */ 2854 void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2855 2856 /** ieee80211_napi_complete - complete NAPI polling 2857 * 2858 * Use this function to finish NAPI polling on a device. 2859 * 2860 * @hw: the hardware to stop polling 2861 */ 2862 void ieee80211_napi_complete(struct ieee80211_hw *hw); 2863 2864 /** 2865 * ieee80211_rx - receive frame 2866 * 2867 * Use this function to hand received frames to mac80211. The receive 2868 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2869 * paged @skb is used, the driver is recommended to put the ieee80211 2870 * header of the frame on the linear part of the @skb to avoid memory 2871 * allocation and/or memcpy by the stack. 2872 * 2873 * This function may not be called in IRQ context. Calls to this function 2874 * for a single hardware must be synchronized against each other. Calls to 2875 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2876 * mixed for a single hardware. 2877 * 2878 * In process context use instead ieee80211_rx_ni(). 2879 * 2880 * @hw: the hardware this frame came in on 2881 * @skb: the buffer to receive, owned by mac80211 after this call 2882 */ 2883 void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2884 2885 /** 2886 * ieee80211_rx_irqsafe - receive frame 2887 * 2888 * Like ieee80211_rx() but can be called in IRQ context 2889 * (internally defers to a tasklet.) 2890 * 2891 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2892 * be mixed for a single hardware. 2893 * 2894 * @hw: the hardware this frame came in on 2895 * @skb: the buffer to receive, owned by mac80211 after this call 2896 */ 2897 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2898 2899 /** 2900 * ieee80211_rx_ni - receive frame (in process context) 2901 * 2902 * Like ieee80211_rx() but can be called in process context 2903 * (internally disables bottom halves). 2904 * 2905 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2906 * not be mixed for a single hardware. 2907 * 2908 * @hw: the hardware this frame came in on 2909 * @skb: the buffer to receive, owned by mac80211 after this call 2910 */ 2911 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2912 struct sk_buff *skb) 2913 { 2914 local_bh_disable(); 2915 ieee80211_rx(hw, skb); 2916 local_bh_enable(); 2917 } 2918 2919 /** 2920 * ieee80211_sta_ps_transition - PS transition for connected sta 2921 * 2922 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2923 * flag set, use this function to inform mac80211 about a connected station 2924 * entering/leaving PS mode. 2925 * 2926 * This function may not be called in IRQ context or with softirqs enabled. 2927 * 2928 * Calls to this function for a single hardware must be synchronized against 2929 * each other. 2930 * 2931 * The function returns -EINVAL when the requested PS mode is already set. 2932 * 2933 * @sta: currently connected sta 2934 * @start: start or stop PS 2935 */ 2936 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 2937 2938 /** 2939 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 2940 * (in process context) 2941 * 2942 * Like ieee80211_sta_ps_transition() but can be called in process context 2943 * (internally disables bottom halves). Concurrent call restriction still 2944 * applies. 2945 * 2946 * @sta: currently connected sta 2947 * @start: start or stop PS 2948 */ 2949 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 2950 bool start) 2951 { 2952 int ret; 2953 2954 local_bh_disable(); 2955 ret = ieee80211_sta_ps_transition(sta, start); 2956 local_bh_enable(); 2957 2958 return ret; 2959 } 2960 2961 /* 2962 * The TX headroom reserved by mac80211 for its own tx_status functions. 2963 * This is enough for the radiotap header. 2964 */ 2965 #define IEEE80211_TX_STATUS_HEADROOM 14 2966 2967 /** 2968 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 2969 * @sta: &struct ieee80211_sta pointer for the sleeping station 2970 * @tid: the TID that has buffered frames 2971 * @buffered: indicates whether or not frames are buffered for this TID 2972 * 2973 * If a driver buffers frames for a powersave station instead of passing 2974 * them back to mac80211 for retransmission, the station may still need 2975 * to be told that there are buffered frames via the TIM bit. 2976 * 2977 * This function informs mac80211 whether or not there are frames that are 2978 * buffered in the driver for a given TID; mac80211 can then use this data 2979 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 2980 * call! Beware of the locking!) 2981 * 2982 * If all frames are released to the station (due to PS-poll or uAPSD) 2983 * then the driver needs to inform mac80211 that there no longer are 2984 * frames buffered. However, when the station wakes up mac80211 assumes 2985 * that all buffered frames will be transmitted and clears this data, 2986 * drivers need to make sure they inform mac80211 about all buffered 2987 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 2988 * 2989 * Note that technically mac80211 only needs to know this per AC, not per 2990 * TID, but since driver buffering will inevitably happen per TID (since 2991 * it is related to aggregation) it is easier to make mac80211 map the 2992 * TID to the AC as required instead of keeping track in all drivers that 2993 * use this API. 2994 */ 2995 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 2996 u8 tid, bool buffered); 2997 2998 /** 2999 * ieee80211_tx_status - transmit status callback 3000 * 3001 * Call this function for all transmitted frames after they have been 3002 * transmitted. It is permissible to not call this function for 3003 * multicast frames but this can affect statistics. 3004 * 3005 * This function may not be called in IRQ context. Calls to this function 3006 * for a single hardware must be synchronized against each other. Calls 3007 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3008 * may not be mixed for a single hardware. 3009 * 3010 * @hw: the hardware the frame was transmitted by 3011 * @skb: the frame that was transmitted, owned by mac80211 after this call 3012 */ 3013 void ieee80211_tx_status(struct ieee80211_hw *hw, 3014 struct sk_buff *skb); 3015 3016 /** 3017 * ieee80211_tx_status_ni - transmit status callback (in process context) 3018 * 3019 * Like ieee80211_tx_status() but can be called in process context. 3020 * 3021 * Calls to this function, ieee80211_tx_status() and 3022 * ieee80211_tx_status_irqsafe() may not be mixed 3023 * for a single hardware. 3024 * 3025 * @hw: the hardware the frame was transmitted by 3026 * @skb: the frame that was transmitted, owned by mac80211 after this call 3027 */ 3028 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3029 struct sk_buff *skb) 3030 { 3031 local_bh_disable(); 3032 ieee80211_tx_status(hw, skb); 3033 local_bh_enable(); 3034 } 3035 3036 /** 3037 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3038 * 3039 * Like ieee80211_tx_status() but can be called in IRQ context 3040 * (internally defers to a tasklet.) 3041 * 3042 * Calls to this function, ieee80211_tx_status() and 3043 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3044 * 3045 * @hw: the hardware the frame was transmitted by 3046 * @skb: the frame that was transmitted, owned by mac80211 after this call 3047 */ 3048 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3049 struct sk_buff *skb); 3050 3051 /** 3052 * ieee80211_report_low_ack - report non-responding station 3053 * 3054 * When operating in AP-mode, call this function to report a non-responding 3055 * connected STA. 3056 * 3057 * @sta: the non-responding connected sta 3058 * @num_packets: number of packets sent to @sta without a response 3059 */ 3060 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3061 3062 /** 3063 * ieee80211_beacon_get_tim - beacon generation function 3064 * @hw: pointer obtained from ieee80211_alloc_hw(). 3065 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3066 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3067 * Set to 0 if invalid (in non-AP modes). 3068 * @tim_length: pointer to variable that will receive the TIM IE length, 3069 * (including the ID and length bytes!). 3070 * Set to 0 if invalid (in non-AP modes). 3071 * 3072 * If the driver implements beaconing modes, it must use this function to 3073 * obtain the beacon frame/template. 3074 * 3075 * If the beacon frames are generated by the host system (i.e., not in 3076 * hardware/firmware), the driver uses this function to get each beacon 3077 * frame from mac80211 -- it is responsible for calling this function 3078 * before the beacon is needed (e.g. based on hardware interrupt). 3079 * 3080 * If the beacon frames are generated by the device, then the driver 3081 * must use the returned beacon as the template and change the TIM IE 3082 * according to the current DTIM parameters/TIM bitmap. 3083 * 3084 * The driver is responsible for freeing the returned skb. 3085 */ 3086 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3087 struct ieee80211_vif *vif, 3088 u16 *tim_offset, u16 *tim_length); 3089 3090 /** 3091 * ieee80211_beacon_get - beacon generation function 3092 * @hw: pointer obtained from ieee80211_alloc_hw(). 3093 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3094 * 3095 * See ieee80211_beacon_get_tim(). 3096 */ 3097 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3098 struct ieee80211_vif *vif) 3099 { 3100 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3101 } 3102 3103 /** 3104 * ieee80211_proberesp_get - retrieve a Probe Response template 3105 * @hw: pointer obtained from ieee80211_alloc_hw(). 3106 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3107 * 3108 * Creates a Probe Response template which can, for example, be uploaded to 3109 * hardware. The destination address should be set by the caller. 3110 * 3111 * Can only be called in AP mode. 3112 */ 3113 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3114 struct ieee80211_vif *vif); 3115 3116 /** 3117 * ieee80211_pspoll_get - retrieve a PS Poll template 3118 * @hw: pointer obtained from ieee80211_alloc_hw(). 3119 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3120 * 3121 * Creates a PS Poll a template which can, for example, uploaded to 3122 * hardware. The template must be updated after association so that correct 3123 * AID, BSSID and MAC address is used. 3124 * 3125 * Note: Caller (or hardware) is responsible for setting the 3126 * &IEEE80211_FCTL_PM bit. 3127 */ 3128 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3129 struct ieee80211_vif *vif); 3130 3131 /** 3132 * ieee80211_nullfunc_get - retrieve a nullfunc template 3133 * @hw: pointer obtained from ieee80211_alloc_hw(). 3134 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3135 * 3136 * Creates a Nullfunc template which can, for example, uploaded to 3137 * hardware. The template must be updated after association so that correct 3138 * BSSID and address is used. 3139 * 3140 * Note: Caller (or hardware) is responsible for setting the 3141 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3142 */ 3143 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3144 struct ieee80211_vif *vif); 3145 3146 /** 3147 * ieee80211_probereq_get - retrieve a Probe Request template 3148 * @hw: pointer obtained from ieee80211_alloc_hw(). 3149 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3150 * @ssid: SSID buffer 3151 * @ssid_len: length of SSID 3152 * @tailroom: tailroom to reserve at end of SKB for IEs 3153 * 3154 * Creates a Probe Request template which can, for example, be uploaded to 3155 * hardware. 3156 */ 3157 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3158 struct ieee80211_vif *vif, 3159 const u8 *ssid, size_t ssid_len, 3160 size_t tailroom); 3161 3162 /** 3163 * ieee80211_rts_get - RTS frame generation function 3164 * @hw: pointer obtained from ieee80211_alloc_hw(). 3165 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3166 * @frame: pointer to the frame that is going to be protected by the RTS. 3167 * @frame_len: the frame length (in octets). 3168 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3169 * @rts: The buffer where to store the RTS frame. 3170 * 3171 * If the RTS frames are generated by the host system (i.e., not in 3172 * hardware/firmware), the low-level driver uses this function to receive 3173 * the next RTS frame from the 802.11 code. The low-level is responsible 3174 * for calling this function before and RTS frame is needed. 3175 */ 3176 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3177 const void *frame, size_t frame_len, 3178 const struct ieee80211_tx_info *frame_txctl, 3179 struct ieee80211_rts *rts); 3180 3181 /** 3182 * ieee80211_rts_duration - Get the duration field for an RTS frame 3183 * @hw: pointer obtained from ieee80211_alloc_hw(). 3184 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3185 * @frame_len: the length of the frame that is going to be protected by the RTS. 3186 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3187 * 3188 * If the RTS is generated in firmware, but the host system must provide 3189 * the duration field, the low-level driver uses this function to receive 3190 * the duration field value in little-endian byteorder. 3191 */ 3192 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3193 struct ieee80211_vif *vif, size_t frame_len, 3194 const struct ieee80211_tx_info *frame_txctl); 3195 3196 /** 3197 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3198 * @hw: pointer obtained from ieee80211_alloc_hw(). 3199 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3200 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3201 * @frame_len: the frame length (in octets). 3202 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3203 * @cts: The buffer where to store the CTS-to-self frame. 3204 * 3205 * If the CTS-to-self frames are generated by the host system (i.e., not in 3206 * hardware/firmware), the low-level driver uses this function to receive 3207 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3208 * for calling this function before and CTS-to-self frame is needed. 3209 */ 3210 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3211 struct ieee80211_vif *vif, 3212 const void *frame, size_t frame_len, 3213 const struct ieee80211_tx_info *frame_txctl, 3214 struct ieee80211_cts *cts); 3215 3216 /** 3217 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3218 * @hw: pointer obtained from ieee80211_alloc_hw(). 3219 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3220 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3221 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3222 * 3223 * If the CTS-to-self is generated in firmware, but the host system must provide 3224 * the duration field, the low-level driver uses this function to receive 3225 * the duration field value in little-endian byteorder. 3226 */ 3227 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3228 struct ieee80211_vif *vif, 3229 size_t frame_len, 3230 const struct ieee80211_tx_info *frame_txctl); 3231 3232 /** 3233 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3234 * @hw: pointer obtained from ieee80211_alloc_hw(). 3235 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3236 * @band: the band to calculate the frame duration on 3237 * @frame_len: the length of the frame. 3238 * @rate: the rate at which the frame is going to be transmitted. 3239 * 3240 * Calculate the duration field of some generic frame, given its 3241 * length and transmission rate (in 100kbps). 3242 */ 3243 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3244 struct ieee80211_vif *vif, 3245 enum ieee80211_band band, 3246 size_t frame_len, 3247 struct ieee80211_rate *rate); 3248 3249 /** 3250 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3251 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3252 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3253 * 3254 * Function for accessing buffered broadcast and multicast frames. If 3255 * hardware/firmware does not implement buffering of broadcast/multicast 3256 * frames when power saving is used, 802.11 code buffers them in the host 3257 * memory. The low-level driver uses this function to fetch next buffered 3258 * frame. In most cases, this is used when generating beacon frame. This 3259 * function returns a pointer to the next buffered skb or NULL if no more 3260 * buffered frames are available. 3261 * 3262 * Note: buffered frames are returned only after DTIM beacon frame was 3263 * generated with ieee80211_beacon_get() and the low-level driver must thus 3264 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3265 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3266 * does not need to check for DTIM beacons separately and should be able to 3267 * use common code for all beacons. 3268 */ 3269 struct sk_buff * 3270 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3271 3272 /** 3273 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3274 * 3275 * This function returns the TKIP phase 1 key for the given IV32. 3276 * 3277 * @keyconf: the parameter passed with the set key 3278 * @iv32: IV32 to get the P1K for 3279 * @p1k: a buffer to which the key will be written, as 5 u16 values 3280 */ 3281 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3282 u32 iv32, u16 *p1k); 3283 3284 /** 3285 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3286 * 3287 * This function returns the TKIP phase 1 key for the IV32 taken 3288 * from the given packet. 3289 * 3290 * @keyconf: the parameter passed with the set key 3291 * @skb: the packet to take the IV32 value from that will be encrypted 3292 * with this P1K 3293 * @p1k: a buffer to which the key will be written, as 5 u16 values 3294 */ 3295 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3296 struct sk_buff *skb, u16 *p1k) 3297 { 3298 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3299 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3300 u32 iv32 = get_unaligned_le32(&data[4]); 3301 3302 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3303 } 3304 3305 /** 3306 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3307 * 3308 * This function returns the TKIP phase 1 key for the given IV32 3309 * and transmitter address. 3310 * 3311 * @keyconf: the parameter passed with the set key 3312 * @ta: TA that will be used with the key 3313 * @iv32: IV32 to get the P1K for 3314 * @p1k: a buffer to which the key will be written, as 5 u16 values 3315 */ 3316 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3317 const u8 *ta, u32 iv32, u16 *p1k); 3318 3319 /** 3320 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3321 * 3322 * This function computes the TKIP RC4 key for the IV values 3323 * in the packet. 3324 * 3325 * @keyconf: the parameter passed with the set key 3326 * @skb: the packet to take the IV32/IV16 values from that will be 3327 * encrypted with this key 3328 * @p2k: a buffer to which the key will be written, 16 bytes 3329 */ 3330 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3331 struct sk_buff *skb, u8 *p2k); 3332 3333 /** 3334 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3335 * 3336 * This function computes the two AES-CMAC sub-keys, based on the 3337 * previously installed master key. 3338 * 3339 * @keyconf: the parameter passed with the set key 3340 * @k1: a buffer to be filled with the 1st sub-key 3341 * @k2: a buffer to be filled with the 2nd sub-key 3342 */ 3343 void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3344 u8 *k1, u8 *k2); 3345 3346 /** 3347 * struct ieee80211_key_seq - key sequence counter 3348 * 3349 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3350 * @ccmp: PN data, most significant byte first (big endian, 3351 * reverse order than in packet) 3352 * @aes_cmac: PN data, most significant byte first (big endian, 3353 * reverse order than in packet) 3354 */ 3355 struct ieee80211_key_seq { 3356 union { 3357 struct { 3358 u32 iv32; 3359 u16 iv16; 3360 } tkip; 3361 struct { 3362 u8 pn[6]; 3363 } ccmp; 3364 struct { 3365 u8 pn[6]; 3366 } aes_cmac; 3367 }; 3368 }; 3369 3370 /** 3371 * ieee80211_get_key_tx_seq - get key TX sequence counter 3372 * 3373 * @keyconf: the parameter passed with the set key 3374 * @seq: buffer to receive the sequence data 3375 * 3376 * This function allows a driver to retrieve the current TX IV/PN 3377 * for the given key. It must not be called if IV generation is 3378 * offloaded to the device. 3379 * 3380 * Note that this function may only be called when no TX processing 3381 * can be done concurrently, for example when queues are stopped 3382 * and the stop has been synchronized. 3383 */ 3384 void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3385 struct ieee80211_key_seq *seq); 3386 3387 /** 3388 * ieee80211_get_key_rx_seq - get key RX sequence counter 3389 * 3390 * @keyconf: the parameter passed with the set key 3391 * @tid: The TID, or -1 for the management frame value (CCMP only); 3392 * the value on TID 0 is also used for non-QoS frames. For 3393 * CMAC, only TID 0 is valid. 3394 * @seq: buffer to receive the sequence data 3395 * 3396 * This function allows a driver to retrieve the current RX IV/PNs 3397 * for the given key. It must not be called if IV checking is done 3398 * by the device and not by mac80211. 3399 * 3400 * Note that this function may only be called when no RX processing 3401 * can be done concurrently. 3402 */ 3403 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3404 int tid, struct ieee80211_key_seq *seq); 3405 3406 /** 3407 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3408 * @vif: virtual interface the rekeying was done on 3409 * @bssid: The BSSID of the AP, for checking association 3410 * @replay_ctr: the new replay counter after GTK rekeying 3411 * @gfp: allocation flags 3412 */ 3413 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3414 const u8 *replay_ctr, gfp_t gfp); 3415 3416 /** 3417 * ieee80211_wake_queue - wake specific queue 3418 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3419 * @queue: queue number (counted from zero). 3420 * 3421 * Drivers should use this function instead of netif_wake_queue. 3422 */ 3423 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3424 3425 /** 3426 * ieee80211_stop_queue - stop specific queue 3427 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3428 * @queue: queue number (counted from zero). 3429 * 3430 * Drivers should use this function instead of netif_stop_queue. 3431 */ 3432 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3433 3434 /** 3435 * ieee80211_queue_stopped - test status of the queue 3436 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3437 * @queue: queue number (counted from zero). 3438 * 3439 * Drivers should use this function instead of netif_stop_queue. 3440 */ 3441 3442 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3443 3444 /** 3445 * ieee80211_stop_queues - stop all queues 3446 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3447 * 3448 * Drivers should use this function instead of netif_stop_queue. 3449 */ 3450 void ieee80211_stop_queues(struct ieee80211_hw *hw); 3451 3452 /** 3453 * ieee80211_wake_queues - wake all queues 3454 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3455 * 3456 * Drivers should use this function instead of netif_wake_queue. 3457 */ 3458 void ieee80211_wake_queues(struct ieee80211_hw *hw); 3459 3460 /** 3461 * ieee80211_scan_completed - completed hardware scan 3462 * 3463 * When hardware scan offload is used (i.e. the hw_scan() callback is 3464 * assigned) this function needs to be called by the driver to notify 3465 * mac80211 that the scan finished. This function can be called from 3466 * any context, including hardirq context. 3467 * 3468 * @hw: the hardware that finished the scan 3469 * @aborted: set to true if scan was aborted 3470 */ 3471 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3472 3473 /** 3474 * ieee80211_sched_scan_results - got results from scheduled scan 3475 * 3476 * When a scheduled scan is running, this function needs to be called by the 3477 * driver whenever there are new scan results available. 3478 * 3479 * @hw: the hardware that is performing scheduled scans 3480 */ 3481 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3482 3483 /** 3484 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3485 * 3486 * When a scheduled scan is running, this function can be called by 3487 * the driver if it needs to stop the scan to perform another task. 3488 * Usual scenarios are drivers that cannot continue the scheduled scan 3489 * while associating, for instance. 3490 * 3491 * @hw: the hardware that is performing scheduled scans 3492 */ 3493 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3494 3495 /** 3496 * enum ieee80211_interface_iteration_flags - interface iteration flags 3497 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3498 * been added to the driver; However, note that during hardware 3499 * reconfiguration (after restart_hw) it will iterate over a new 3500 * interface and over all the existing interfaces even if they 3501 * haven't been re-added to the driver yet. 3502 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3503 * interfaces, even if they haven't been re-added to the driver yet. 3504 */ 3505 enum ieee80211_interface_iteration_flags { 3506 IEEE80211_IFACE_ITER_NORMAL = 0, 3507 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3508 }; 3509 3510 /** 3511 * ieee80211_iterate_active_interfaces - iterate active interfaces 3512 * 3513 * This function iterates over the interfaces associated with a given 3514 * hardware that are currently active and calls the callback for them. 3515 * This function allows the iterator function to sleep, when the iterator 3516 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3517 * be used. 3518 * Does not iterate over a new interface during add_interface(). 3519 * 3520 * @hw: the hardware struct of which the interfaces should be iterated over 3521 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3522 * @iterator: the iterator function to call 3523 * @data: first argument of the iterator function 3524 */ 3525 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3526 u32 iter_flags, 3527 void (*iterator)(void *data, u8 *mac, 3528 struct ieee80211_vif *vif), 3529 void *data); 3530 3531 /** 3532 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3533 * 3534 * This function iterates over the interfaces associated with a given 3535 * hardware that are currently active and calls the callback for them. 3536 * This function requires the iterator callback function to be atomic, 3537 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3538 * Does not iterate over a new interface during add_interface(). 3539 * 3540 * @hw: the hardware struct of which the interfaces should be iterated over 3541 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3542 * @iterator: the iterator function to call, cannot sleep 3543 * @data: first argument of the iterator function 3544 */ 3545 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3546 u32 iter_flags, 3547 void (*iterator)(void *data, 3548 u8 *mac, 3549 struct ieee80211_vif *vif), 3550 void *data); 3551 3552 /** 3553 * ieee80211_queue_work - add work onto the mac80211 workqueue 3554 * 3555 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3556 * This helper ensures drivers are not queueing work when they should not be. 3557 * 3558 * @hw: the hardware struct for the interface we are adding work for 3559 * @work: the work we want to add onto the mac80211 workqueue 3560 */ 3561 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3562 3563 /** 3564 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3565 * 3566 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3567 * workqueue. 3568 * 3569 * @hw: the hardware struct for the interface we are adding work for 3570 * @dwork: delayable work to queue onto the mac80211 workqueue 3571 * @delay: number of jiffies to wait before queueing 3572 */ 3573 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3574 struct delayed_work *dwork, 3575 unsigned long delay); 3576 3577 /** 3578 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3579 * @sta: the station for which to start a BA session 3580 * @tid: the TID to BA on. 3581 * @timeout: session timeout value (in TUs) 3582 * 3583 * Return: success if addBA request was sent, failure otherwise 3584 * 3585 * Although mac80211/low level driver/user space application can estimate 3586 * the need to start aggregation on a certain RA/TID, the session level 3587 * will be managed by the mac80211. 3588 */ 3589 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3590 u16 timeout); 3591 3592 /** 3593 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3594 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3595 * @ra: receiver address of the BA session recipient. 3596 * @tid: the TID to BA on. 3597 * 3598 * This function must be called by low level driver once it has 3599 * finished with preparations for the BA session. It can be called 3600 * from any context. 3601 */ 3602 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3603 u16 tid); 3604 3605 /** 3606 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3607 * @sta: the station whose BA session to stop 3608 * @tid: the TID to stop BA. 3609 * 3610 * Return: negative error if the TID is invalid, or no aggregation active 3611 * 3612 * Although mac80211/low level driver/user space application can estimate 3613 * the need to stop aggregation on a certain RA/TID, the session level 3614 * will be managed by the mac80211. 3615 */ 3616 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3617 3618 /** 3619 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3620 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3621 * @ra: receiver address of the BA session recipient. 3622 * @tid: the desired TID to BA on. 3623 * 3624 * This function must be called by low level driver once it has 3625 * finished with preparations for the BA session tear down. It 3626 * can be called from any context. 3627 */ 3628 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3629 u16 tid); 3630 3631 /** 3632 * ieee80211_find_sta - find a station 3633 * 3634 * @vif: virtual interface to look for station on 3635 * @addr: station's address 3636 * 3637 * This function must be called under RCU lock and the 3638 * resulting pointer is only valid under RCU lock as well. 3639 */ 3640 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3641 const u8 *addr); 3642 3643 /** 3644 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3645 * 3646 * @hw: pointer as obtained from ieee80211_alloc_hw() 3647 * @addr: remote station's address 3648 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3649 * 3650 * This function must be called under RCU lock and the 3651 * resulting pointer is only valid under RCU lock as well. 3652 * 3653 * NOTE: You may pass NULL for localaddr, but then you will just get 3654 * the first STA that matches the remote address 'addr'. 3655 * We can have multiple STA associated with multiple 3656 * logical stations (e.g. consider a station connecting to another 3657 * BSSID on the same AP hardware without disconnecting first). 3658 * In this case, the result of this method with localaddr NULL 3659 * is not reliable. 3660 * 3661 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3662 */ 3663 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3664 const u8 *addr, 3665 const u8 *localaddr); 3666 3667 /** 3668 * ieee80211_sta_block_awake - block station from waking up 3669 * @hw: the hardware 3670 * @pubsta: the station 3671 * @block: whether to block or unblock 3672 * 3673 * Some devices require that all frames that are on the queues 3674 * for a specific station that went to sleep are flushed before 3675 * a poll response or frames after the station woke up can be 3676 * delivered to that it. Note that such frames must be rejected 3677 * by the driver as filtered, with the appropriate status flag. 3678 * 3679 * This function allows implementing this mode in a race-free 3680 * manner. 3681 * 3682 * To do this, a driver must keep track of the number of frames 3683 * still enqueued for a specific station. If this number is not 3684 * zero when the station goes to sleep, the driver must call 3685 * this function to force mac80211 to consider the station to 3686 * be asleep regardless of the station's actual state. Once the 3687 * number of outstanding frames reaches zero, the driver must 3688 * call this function again to unblock the station. That will 3689 * cause mac80211 to be able to send ps-poll responses, and if 3690 * the station queried in the meantime then frames will also 3691 * be sent out as a result of this. Additionally, the driver 3692 * will be notified that the station woke up some time after 3693 * it is unblocked, regardless of whether the station actually 3694 * woke up while blocked or not. 3695 */ 3696 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3697 struct ieee80211_sta *pubsta, bool block); 3698 3699 /** 3700 * ieee80211_sta_eosp - notify mac80211 about end of SP 3701 * @pubsta: the station 3702 * 3703 * When a device transmits frames in a way that it can't tell 3704 * mac80211 in the TX status about the EOSP, it must clear the 3705 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3706 * This applies for PS-Poll as well as uAPSD. 3707 * 3708 * Note that there is no non-_irqsafe version right now as 3709 * it wasn't needed, but just like _tx_status() and _rx() 3710 * must not be mixed in irqsafe/non-irqsafe versions, this 3711 * function must not be mixed with those either. Use the 3712 * all irqsafe, or all non-irqsafe, don't mix! If you need 3713 * the non-irqsafe version of this, you need to add it. 3714 */ 3715 void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3716 3717 /** 3718 * ieee80211_iter_keys - iterate keys programmed into the device 3719 * @hw: pointer obtained from ieee80211_alloc_hw() 3720 * @vif: virtual interface to iterate, may be %NULL for all 3721 * @iter: iterator function that will be called for each key 3722 * @iter_data: custom data to pass to the iterator function 3723 * 3724 * This function can be used to iterate all the keys known to 3725 * mac80211, even those that weren't previously programmed into 3726 * the device. This is intended for use in WoWLAN if the device 3727 * needs reprogramming of the keys during suspend. Note that due 3728 * to locking reasons, it is also only safe to call this at few 3729 * spots since it must hold the RTNL and be able to sleep. 3730 * 3731 * The order in which the keys are iterated matches the order 3732 * in which they were originally installed and handed to the 3733 * set_key callback. 3734 */ 3735 void ieee80211_iter_keys(struct ieee80211_hw *hw, 3736 struct ieee80211_vif *vif, 3737 void (*iter)(struct ieee80211_hw *hw, 3738 struct ieee80211_vif *vif, 3739 struct ieee80211_sta *sta, 3740 struct ieee80211_key_conf *key, 3741 void *data), 3742 void *iter_data); 3743 3744 /** 3745 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 3746 * @hw: pointre obtained from ieee80211_alloc_hw(). 3747 * @iter: iterator function 3748 * @iter_data: data passed to iterator function 3749 * 3750 * Iterate all active channel contexts. This function is atomic and 3751 * doesn't acquire any locks internally that might be held in other 3752 * places while calling into the driver. 3753 * 3754 * The iterator will not find a context that's being added (during 3755 * the driver callback to add it) but will find it while it's being 3756 * removed. 3757 */ 3758 void ieee80211_iter_chan_contexts_atomic( 3759 struct ieee80211_hw *hw, 3760 void (*iter)(struct ieee80211_hw *hw, 3761 struct ieee80211_chanctx_conf *chanctx_conf, 3762 void *data), 3763 void *iter_data); 3764 3765 /** 3766 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3767 * @hw: pointer obtained from ieee80211_alloc_hw(). 3768 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3769 * 3770 * Creates a Probe Request template which can, for example, be uploaded to 3771 * hardware. The template is filled with bssid, ssid and supported rate 3772 * information. This function must only be called from within the 3773 * .bss_info_changed callback function and only in managed mode. The function 3774 * is only useful when the interface is associated, otherwise it will return 3775 * NULL. 3776 */ 3777 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3778 struct ieee80211_vif *vif); 3779 3780 /** 3781 * ieee80211_beacon_loss - inform hardware does not receive beacons 3782 * 3783 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3784 * 3785 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3786 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3787 * hardware is not receiving beacons with this function. 3788 */ 3789 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3790 3791 /** 3792 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3793 * 3794 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3795 * 3796 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3797 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3798 * needs to inform if the connection to the AP has been lost. 3799 * 3800 * This function will cause immediate change to disassociated state, 3801 * without connection recovery attempts. 3802 */ 3803 void ieee80211_connection_loss(struct ieee80211_vif *vif); 3804 3805 /** 3806 * ieee80211_resume_disconnect - disconnect from AP after resume 3807 * 3808 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3809 * 3810 * Instructs mac80211 to disconnect from the AP after resume. 3811 * Drivers can use this after WoWLAN if they know that the 3812 * connection cannot be kept up, for example because keys were 3813 * used while the device was asleep but the replay counters or 3814 * similar cannot be retrieved from the device during resume. 3815 * 3816 * Note that due to implementation issues, if the driver uses 3817 * the reconfiguration functionality during resume the interface 3818 * will still be added as associated first during resume and then 3819 * disconnect normally later. 3820 * 3821 * This function can only be called from the resume callback and 3822 * the driver must not be holding any of its own locks while it 3823 * calls this function, or at least not any locks it needs in the 3824 * key configuration paths (if it supports HW crypto). 3825 */ 3826 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3827 3828 /** 3829 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3830 * 3831 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3832 * 3833 * Some hardware require full power save to manage simultaneous BT traffic 3834 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3835 * burst of BT traffic. The hardware gets information of BT traffic via 3836 * hardware co-existence lines, and consequentially requests mac80211 to 3837 * (temporarily) enter full psm. 3838 * This function will only temporarily disable dynamic PS, not enable PSM if 3839 * it was not already enabled. 3840 * The driver must make sure to re-enable dynamic PS using 3841 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3842 * 3843 */ 3844 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3845 3846 /** 3847 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3848 * 3849 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3850 * 3851 * This function restores dynamic PS after being temporarily disabled via 3852 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3853 * be coupled with an eventual call to this function. 3854 * 3855 */ 3856 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3857 3858 /** 3859 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3860 * rssi threshold triggered 3861 * 3862 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3863 * @rssi_event: the RSSI trigger event type 3864 * @gfp: context flags 3865 * 3866 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3867 * monitoring is configured with an rssi threshold, the driver will inform 3868 * whenever the rssi level reaches the threshold. 3869 */ 3870 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3871 enum nl80211_cqm_rssi_threshold_event rssi_event, 3872 gfp_t gfp); 3873 3874 /** 3875 * ieee80211_chswitch_done - Complete channel switch process 3876 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3877 * @success: make the channel switch successful or not 3878 * 3879 * Complete the channel switch post-process: set the new operational channel 3880 * and wake up the suspended queues. 3881 */ 3882 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3883 3884 /** 3885 * ieee80211_request_smps - request SM PS transition 3886 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3887 * @smps_mode: new SM PS mode 3888 * 3889 * This allows the driver to request an SM PS transition in managed 3890 * mode. This is useful when the driver has more information than 3891 * the stack about possible interference, for example by bluetooth. 3892 */ 3893 void ieee80211_request_smps(struct ieee80211_vif *vif, 3894 enum ieee80211_smps_mode smps_mode); 3895 3896 /** 3897 * ieee80211_ready_on_channel - notification of remain-on-channel start 3898 * @hw: pointer as obtained from ieee80211_alloc_hw() 3899 */ 3900 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 3901 3902 /** 3903 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 3904 * @hw: pointer as obtained from ieee80211_alloc_hw() 3905 */ 3906 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 3907 3908 /** 3909 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 3910 * 3911 * in order not to harm the system performance and user experience, the device 3912 * may request not to allow any rx ba session and tear down existing rx ba 3913 * sessions based on system constraints such as periodic BT activity that needs 3914 * to limit wlan activity (eg.sco or a2dp)." 3915 * in such cases, the intention is to limit the duration of the rx ppdu and 3916 * therefore prevent the peer device to use a-mpdu aggregation. 3917 * 3918 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3919 * @ba_rx_bitmap: Bit map of open rx ba per tid 3920 * @addr: & to bssid mac address 3921 */ 3922 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 3923 const u8 *addr); 3924 3925 /** 3926 * ieee80211_send_bar - send a BlockAckReq frame 3927 * 3928 * can be used to flush pending frames from the peer's aggregation reorder 3929 * buffer. 3930 * 3931 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3932 * @ra: the peer's destination address 3933 * @tid: the TID of the aggregation session 3934 * @ssn: the new starting sequence number for the receiver 3935 */ 3936 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 3937 3938 /* Rate control API */ 3939 3940 /** 3941 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 3942 * 3943 * @hw: The hardware the algorithm is invoked for. 3944 * @sband: The band this frame is being transmitted on. 3945 * @bss_conf: the current BSS configuration 3946 * @skb: the skb that will be transmitted, the control information in it needs 3947 * to be filled in 3948 * @reported_rate: The rate control algorithm can fill this in to indicate 3949 * which rate should be reported to userspace as the current rate and 3950 * used for rate calculations in the mesh network. 3951 * @rts: whether RTS will be used for this frame because it is longer than the 3952 * RTS threshold 3953 * @short_preamble: whether mac80211 will request short-preamble transmission 3954 * if the selected rate supports it 3955 * @max_rate_idx: user-requested maximum (legacy) rate 3956 * (deprecated; this will be removed once drivers get updated to use 3957 * rate_idx_mask) 3958 * @rate_idx_mask: user-requested (legacy) rate mask 3959 * @rate_idx_mcs_mask: user-requested MCS rate mask 3960 * @bss: whether this frame is sent out in AP or IBSS mode 3961 */ 3962 struct ieee80211_tx_rate_control { 3963 struct ieee80211_hw *hw; 3964 struct ieee80211_supported_band *sband; 3965 struct ieee80211_bss_conf *bss_conf; 3966 struct sk_buff *skb; 3967 struct ieee80211_tx_rate reported_rate; 3968 bool rts, short_preamble; 3969 u8 max_rate_idx; 3970 u32 rate_idx_mask; 3971 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 3972 bool bss; 3973 }; 3974 3975 struct rate_control_ops { 3976 struct module *module; 3977 const char *name; 3978 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 3979 void (*free)(void *priv); 3980 3981 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 3982 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 3983 struct ieee80211_sta *sta, void *priv_sta); 3984 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 3985 struct ieee80211_sta *sta, void *priv_sta, 3986 u32 changed); 3987 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 3988 void *priv_sta); 3989 3990 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 3991 struct ieee80211_sta *sta, void *priv_sta, 3992 struct sk_buff *skb); 3993 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 3994 struct ieee80211_tx_rate_control *txrc); 3995 3996 void (*add_sta_debugfs)(void *priv, void *priv_sta, 3997 struct dentry *dir); 3998 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 3999 }; 4000 4001 static inline int rate_supported(struct ieee80211_sta *sta, 4002 enum ieee80211_band band, 4003 int index) 4004 { 4005 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4006 } 4007 4008 /** 4009 * rate_control_send_low - helper for drivers for management/no-ack frames 4010 * 4011 * Rate control algorithms that agree to use the lowest rate to 4012 * send management frames and NO_ACK data with the respective hw 4013 * retries should use this in the beginning of their mac80211 get_rate 4014 * callback. If true is returned the rate control can simply return. 4015 * If false is returned we guarantee that sta and sta and priv_sta is 4016 * not null. 4017 * 4018 * Rate control algorithms wishing to do more intelligent selection of 4019 * rate for multicast/broadcast frames may choose to not use this. 4020 * 4021 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4022 * that this may be null. 4023 * @priv_sta: private rate control structure. This may be null. 4024 * @txrc: rate control information we sholud populate for mac80211. 4025 */ 4026 bool rate_control_send_low(struct ieee80211_sta *sta, 4027 void *priv_sta, 4028 struct ieee80211_tx_rate_control *txrc); 4029 4030 4031 static inline s8 4032 rate_lowest_index(struct ieee80211_supported_band *sband, 4033 struct ieee80211_sta *sta) 4034 { 4035 int i; 4036 4037 for (i = 0; i < sband->n_bitrates; i++) 4038 if (rate_supported(sta, sband->band, i)) 4039 return i; 4040 4041 /* warn when we cannot find a rate. */ 4042 WARN_ON_ONCE(1); 4043 4044 /* and return 0 (the lowest index) */ 4045 return 0; 4046 } 4047 4048 static inline 4049 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4050 struct ieee80211_sta *sta) 4051 { 4052 unsigned int i; 4053 4054 for (i = 0; i < sband->n_bitrates; i++) 4055 if (rate_supported(sta, sband->band, i)) 4056 return true; 4057 return false; 4058 } 4059 4060 int ieee80211_rate_control_register(struct rate_control_ops *ops); 4061 void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4062 4063 static inline bool 4064 conf_is_ht20(struct ieee80211_conf *conf) 4065 { 4066 return conf->channel_type == NL80211_CHAN_HT20; 4067 } 4068 4069 static inline bool 4070 conf_is_ht40_minus(struct ieee80211_conf *conf) 4071 { 4072 return conf->channel_type == NL80211_CHAN_HT40MINUS; 4073 } 4074 4075 static inline bool 4076 conf_is_ht40_plus(struct ieee80211_conf *conf) 4077 { 4078 return conf->channel_type == NL80211_CHAN_HT40PLUS; 4079 } 4080 4081 static inline bool 4082 conf_is_ht40(struct ieee80211_conf *conf) 4083 { 4084 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 4085 } 4086 4087 static inline bool 4088 conf_is_ht(struct ieee80211_conf *conf) 4089 { 4090 return conf->channel_type != NL80211_CHAN_NO_HT; 4091 } 4092 4093 static inline enum nl80211_iftype 4094 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4095 { 4096 if (p2p) { 4097 switch (type) { 4098 case NL80211_IFTYPE_STATION: 4099 return NL80211_IFTYPE_P2P_CLIENT; 4100 case NL80211_IFTYPE_AP: 4101 return NL80211_IFTYPE_P2P_GO; 4102 default: 4103 break; 4104 } 4105 } 4106 return type; 4107 } 4108 4109 static inline enum nl80211_iftype 4110 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4111 { 4112 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4113 } 4114 4115 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4116 int rssi_min_thold, 4117 int rssi_max_thold); 4118 4119 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4120 4121 /** 4122 * ieee80211_ave_rssi - report the average rssi for the specified interface 4123 * 4124 * @vif: the specified virtual interface 4125 * 4126 * This function return the average rssi value for the requested interface. 4127 * It assumes that the given vif is valid. 4128 */ 4129 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4130 4131 #endif /* MAC80211_H */ 4132