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 * @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed 151 */ 152 enum ieee80211_chanctx_change { 153 IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0), 154 IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1), 155 IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2), 156 }; 157 158 /** 159 * struct ieee80211_chanctx_conf - channel context that vifs may be tuned to 160 * 161 * This is the driver-visible part. The ieee80211_chanctx 162 * that contains it is visible in mac80211 only. 163 * 164 * @def: the channel definition 165 * @rx_chains_static: The number of RX chains that must always be 166 * active on the channel to receive MIMO transmissions 167 * @rx_chains_dynamic: The number of RX chains that must be enabled 168 * after RTS/CTS handshake to receive SMPS MIMO transmissions; 169 * this will always be >= @rx_chains_static. 170 * @radar_enabled: whether radar detection is enabled on this channel. 171 * @drv_priv: data area for driver use, will always be aligned to 172 * sizeof(void *), size is determined in hw information. 173 */ 174 struct ieee80211_chanctx_conf { 175 struct cfg80211_chan_def def; 176 177 u8 rx_chains_static, rx_chains_dynamic; 178 179 bool radar_enabled; 180 181 u8 drv_priv[0] __aligned(sizeof(void *)); 182 }; 183 184 /** 185 * enum ieee80211_bss_change - BSS change notification flags 186 * 187 * These flags are used with the bss_info_changed() callback 188 * to indicate which BSS parameter changed. 189 * 190 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 191 * also implies a change in the AID. 192 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 193 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 194 * @BSS_CHANGED_ERP_SLOT: slot timing changed 195 * @BSS_CHANGED_HT: 802.11n parameters changed 196 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 197 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 198 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 199 * reason (IBSS and managed mode) 200 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 201 * new beacon (beaconing modes) 202 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 203 * enabled/disabled (beaconing modes) 204 * @BSS_CHANGED_CQM: Connection quality monitor config changed 205 * @BSS_CHANGED_IBSS: IBSS join status changed 206 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 207 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 208 * that it is only ever disabled for station mode. 209 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 210 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 211 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 212 * @BSS_CHANGED_PS: PS changed for this BSS (STA mode) 213 * @BSS_CHANGED_TXPOWER: TX power setting changed for this interface 214 * @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS) 215 * changed (currently only in P2P client mode, GO mode will be later) 216 * @BSS_CHANGED_DTIM_PERIOD: the DTIM period value was changed (set when 217 * it becomes valid, managed mode only) 218 * @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed, 219 * note that this is only called when it changes after the channel 220 * context had been assigned. 221 */ 222 enum ieee80211_bss_change { 223 BSS_CHANGED_ASSOC = 1<<0, 224 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 225 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 226 BSS_CHANGED_ERP_SLOT = 1<<3, 227 BSS_CHANGED_HT = 1<<4, 228 BSS_CHANGED_BASIC_RATES = 1<<5, 229 BSS_CHANGED_BEACON_INT = 1<<6, 230 BSS_CHANGED_BSSID = 1<<7, 231 BSS_CHANGED_BEACON = 1<<8, 232 BSS_CHANGED_BEACON_ENABLED = 1<<9, 233 BSS_CHANGED_CQM = 1<<10, 234 BSS_CHANGED_IBSS = 1<<11, 235 BSS_CHANGED_ARP_FILTER = 1<<12, 236 BSS_CHANGED_QOS = 1<<13, 237 BSS_CHANGED_IDLE = 1<<14, 238 BSS_CHANGED_SSID = 1<<15, 239 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 240 BSS_CHANGED_PS = 1<<17, 241 BSS_CHANGED_TXPOWER = 1<<18, 242 BSS_CHANGED_P2P_PS = 1<<19, 243 BSS_CHANGED_DTIM_PERIOD = 1<<20, 244 BSS_CHANGED_BANDWIDTH = 1<<21, 245 246 /* when adding here, make sure to change ieee80211_reconfig */ 247 }; 248 249 /* 250 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 251 * of addresses for an interface increase beyond this value, hardware ARP 252 * filtering will be disabled. 253 */ 254 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 255 256 /** 257 * enum ieee80211_rssi_event - RSSI threshold event 258 * An indicator for when RSSI goes below/above a certain threshold. 259 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 260 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 261 */ 262 enum ieee80211_rssi_event { 263 RSSI_EVENT_HIGH, 264 RSSI_EVENT_LOW, 265 }; 266 267 /** 268 * struct ieee80211_bss_conf - holds the BSS's changing parameters 269 * 270 * This structure keeps information about a BSS (and an association 271 * to that BSS) that can change during the lifetime of the BSS. 272 * 273 * @assoc: association status 274 * @ibss_joined: indicates whether this station is part of an IBSS 275 * or not 276 * @ibss_creator: indicates if a new IBSS network is being created 277 * @aid: association ID number, valid only when @assoc is true 278 * @use_cts_prot: use CTS protection 279 * @use_short_preamble: use 802.11b short preamble; 280 * if the hardware cannot handle this it must set the 281 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 282 * @use_short_slot: use short slot time (only relevant for ERP); 283 * if the hardware cannot handle this it must set the 284 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 285 * @dtim_period: num of beacons before the next DTIM, for beaconing, 286 * valid in station mode only if after the driver was notified 287 * with the %BSS_CHANGED_DTIM_PERIOD flag, will be non-zero then. 288 * @sync_tsf: last beacon's/probe response's TSF timestamp (could be old 289 * as it may have been received during scanning long ago). If the 290 * HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can 291 * only come from a beacon, but might not become valid until after 292 * association when a beacon is received (which is notified with the 293 * %BSS_CHANGED_DTIM flag.) 294 * @sync_device_ts: the device timestamp corresponding to the sync_tsf, 295 * the driver/device can use this to calculate synchronisation 296 * (see @sync_tsf) 297 * @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY 298 * is requested, see @sync_tsf/@sync_device_ts. 299 * @beacon_int: beacon interval 300 * @assoc_capability: capabilities taken from assoc resp 301 * @basic_rates: bitmap of basic rates, each bit stands for an 302 * index into the rate table configured by the driver in 303 * the current band. 304 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 305 * @bssid: The BSSID for this BSS 306 * @enable_beacon: whether beaconing should be enabled or not 307 * @chandef: Channel definition for this BSS -- the hardware might be 308 * configured a higher bandwidth than this BSS uses, for example. 309 * @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation. 310 * This field is only valid when the channel type is one of the HT types. 311 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 312 * implies disabled 313 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 314 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 315 * may filter ARP queries targeted for other addresses than listed here. 316 * The driver must allow ARP queries targeted for all address listed here 317 * to pass through. An empty list implies no ARP queries need to pass. 318 * @arp_addr_cnt: Number of addresses currently on the list. Note that this 319 * may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list 320 * array size), it's up to the driver what to do in that case. 321 * @qos: This is a QoS-enabled BSS. 322 * @idle: This interface is idle. There's also a global idle flag in the 323 * hardware config which may be more appropriate depending on what 324 * your driver/device needs to do. 325 * @ps: power-save mode (STA only). This flag is NOT affected by 326 * offchannel/dynamic_ps operations. 327 * @ssid: The SSID of the current vif. Only valid in AP-mode. 328 * @ssid_len: Length of SSID given in @ssid. 329 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 330 * @txpower: TX power in dBm 331 * @p2p_ctwindow: P2P CTWindow, only for P2P client interfaces 332 * @p2p_oppps: P2P opportunistic PS is enabled 333 */ 334 struct ieee80211_bss_conf { 335 const u8 *bssid; 336 /* association related data */ 337 bool assoc, ibss_joined; 338 bool ibss_creator; 339 u16 aid; 340 /* erp related data */ 341 bool use_cts_prot; 342 bool use_short_preamble; 343 bool use_short_slot; 344 bool enable_beacon; 345 u8 dtim_period; 346 u16 beacon_int; 347 u16 assoc_capability; 348 u64 sync_tsf; 349 u32 sync_device_ts; 350 u8 sync_dtim_count; 351 u32 basic_rates; 352 int mcast_rate[IEEE80211_NUM_BANDS]; 353 u16 ht_operation_mode; 354 s32 cqm_rssi_thold; 355 u32 cqm_rssi_hyst; 356 struct cfg80211_chan_def chandef; 357 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 358 int arp_addr_cnt; 359 bool qos; 360 bool idle; 361 bool ps; 362 u8 ssid[IEEE80211_MAX_SSID_LEN]; 363 size_t ssid_len; 364 bool hidden_ssid; 365 int txpower; 366 u8 p2p_ctwindow; 367 bool p2p_oppps; 368 }; 369 370 /** 371 * enum mac80211_tx_control_flags - flags to describe transmission information/status 372 * 373 * These flags are used with the @flags member of &ieee80211_tx_info. 374 * 375 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 376 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 377 * number to this frame, taking care of not overwriting the fragment 378 * number and increasing the sequence number only when the 379 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 380 * assign sequence numbers to QoS-data frames but cannot do so correctly 381 * for non-QoS-data and management frames because beacons need them from 382 * that counter as well and mac80211 cannot guarantee proper sequencing. 383 * If this flag is set, the driver should instruct the hardware to 384 * assign a sequence number to the frame or assign one itself. Cf. IEEE 385 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 386 * beacons and always be clear for frames without a sequence number field. 387 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 388 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 389 * station 390 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 391 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 392 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 393 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 394 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 395 * because the destination STA was in powersave mode. Note that to 396 * avoid race conditions, the filter must be set by the hardware or 397 * firmware upon receiving a frame that indicates that the station 398 * went to sleep (must be done on device to filter frames already on 399 * the queue) and may only be unset after mac80211 gives the OK for 400 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 401 * since only then is it guaranteed that no more frames are in the 402 * hardware queue. 403 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 404 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 405 * is for the whole aggregation. 406 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 407 * so consider using block ack request (BAR). 408 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 409 * set by rate control algorithms to indicate probe rate, will 410 * be cleared for fragmented frames (except on the last fragment) 411 * @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate 412 * that a frame can be transmitted while the queues are stopped for 413 * off-channel operation. 414 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 415 * used to indicate that a pending frame requires TX processing before 416 * it can be sent out. 417 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 418 * used to indicate that a frame was already retried due to PS 419 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 420 * used to indicate frame should not be encrypted 421 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 422 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 423 * be sent although the station is in powersave mode. 424 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 425 * transmit function after the current frame, this can be used 426 * by drivers to kick the DMA queue only if unset or when the 427 * queue gets full. 428 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 429 * after TX status because the destination was asleep, it must not 430 * be modified again (no seqno assignment, crypto, etc.) 431 * @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME 432 * code for connection establishment, this indicates that its status 433 * should kick the MLME state machine. 434 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 435 * MLME command (internal to mac80211 to figure out whether to send TX 436 * status to user space) 437 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 438 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 439 * frame and selects the maximum number of streams that it can use. 440 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 441 * the off-channel channel when a remain-on-channel offload is done 442 * in hardware -- normal packets still flow and are expected to be 443 * handled properly by the device. 444 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 445 * testing. It will be sent out with incorrect Michael MIC key to allow 446 * TKIP countermeasures to be tested. 447 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 448 * This flag is actually used for management frame especially for P2P 449 * frames not being sent at CCK rate in 2GHz band. 450 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 451 * when its status is reported the service period ends. For frames in 452 * an SP that mac80211 transmits, it is already set; for driver frames 453 * the driver may set this flag. It is also used to do the same for 454 * PS-Poll responses. 455 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 456 * This flag is used to send nullfunc frame at minimum rate when 457 * the nullfunc is used for connection monitoring purpose. 458 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 459 * would be fragmented by size (this is optional, only used for 460 * monitor injection). 461 * 462 * Note: If you have to add new flags to the enumeration, then don't 463 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 464 */ 465 enum mac80211_tx_control_flags { 466 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 467 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 468 IEEE80211_TX_CTL_NO_ACK = BIT(2), 469 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 470 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 471 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 472 IEEE80211_TX_CTL_AMPDU = BIT(6), 473 IEEE80211_TX_CTL_INJECTED = BIT(7), 474 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 475 IEEE80211_TX_STAT_ACK = BIT(9), 476 IEEE80211_TX_STAT_AMPDU = BIT(10), 477 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 478 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 479 IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13), 480 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 481 IEEE80211_TX_INTFL_RETRIED = BIT(15), 482 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 483 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 484 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 485 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 486 IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20), 487 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 488 IEEE80211_TX_CTL_LDPC = BIT(22), 489 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 490 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 491 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 492 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 493 IEEE80211_TX_STATUS_EOSP = BIT(28), 494 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 495 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 496 }; 497 498 #define IEEE80211_TX_CTL_STBC_SHIFT 23 499 500 /* 501 * This definition is used as a mask to clear all temporary flags, which are 502 * set by the tx handlers for each transmission attempt by the mac80211 stack. 503 */ 504 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 505 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 506 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 507 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 508 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 509 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 510 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 511 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 512 513 /** 514 * enum mac80211_rate_control_flags - per-rate flags set by the 515 * Rate Control algorithm. 516 * 517 * These flags are set by the Rate control algorithm for each rate during tx, 518 * in the @flags member of struct ieee80211_tx_rate. 519 * 520 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 521 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 522 * This is set if the current BSS requires ERP protection. 523 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 524 * @IEEE80211_TX_RC_MCS: HT rate. 525 * @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split 526 * into a higher 4 bits (Nss) and lower 4 bits (MCS number) 527 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 528 * Greenfield mode. 529 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 530 * @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission 531 * @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission 532 * (80+80 isn't supported yet) 533 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 534 * adjacent 20 MHz channels, if the current channel type is 535 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 536 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 537 */ 538 enum mac80211_rate_control_flags { 539 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 540 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 541 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 542 543 /* rate index is an HT/VHT MCS instead of an index */ 544 IEEE80211_TX_RC_MCS = BIT(3), 545 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 546 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 547 IEEE80211_TX_RC_DUP_DATA = BIT(6), 548 IEEE80211_TX_RC_SHORT_GI = BIT(7), 549 IEEE80211_TX_RC_VHT_MCS = BIT(8), 550 IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9), 551 IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10), 552 }; 553 554 555 /* there are 40 bytes if you don't need the rateset to be kept */ 556 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 557 558 /* if you do need the rateset, then you have less space */ 559 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 560 561 /* maximum number of rate stages */ 562 #define IEEE80211_TX_MAX_RATES 4 563 564 /** 565 * struct ieee80211_tx_rate - rate selection/status 566 * 567 * @idx: rate index to attempt to send with 568 * @flags: rate control flags (&enum mac80211_rate_control_flags) 569 * @count: number of tries in this rate before going to the next rate 570 * 571 * A value of -1 for @idx indicates an invalid rate and, if used 572 * in an array of retry rates, that no more rates should be tried. 573 * 574 * When used for transmit status reporting, the driver should 575 * always report the rate along with the flags it used. 576 * 577 * &struct ieee80211_tx_info contains an array of these structs 578 * in the control information, and it will be filled by the rate 579 * control algorithm according to what should be sent. For example, 580 * if this array contains, in the format { <idx>, <count> } the 581 * information 582 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 583 * then this means that the frame should be transmitted 584 * up to twice at rate 3, up to twice at rate 2, and up to four 585 * times at rate 1 if it doesn't get acknowledged. Say it gets 586 * acknowledged by the peer after the fifth attempt, the status 587 * information should then contain 588 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 589 * since it was transmitted twice at rate 3, twice at rate 2 590 * and once at rate 1 after which we received an acknowledgement. 591 */ 592 struct ieee80211_tx_rate { 593 s8 idx; 594 u16 count:5, 595 flags:11; 596 } __packed; 597 598 #define IEEE80211_MAX_TX_RETRY 31 599 600 static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate, 601 u8 mcs, u8 nss) 602 { 603 WARN_ON(mcs & ~0xF); 604 WARN_ON(nss & ~0x7); 605 rate->idx = (nss << 4) | mcs; 606 } 607 608 static inline u8 609 ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate) 610 { 611 return rate->idx & 0xF; 612 } 613 614 static inline u8 615 ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate) 616 { 617 return rate->idx >> 4; 618 } 619 620 /** 621 * struct ieee80211_tx_info - skb transmit information 622 * 623 * This structure is placed in skb->cb for three uses: 624 * (1) mac80211 TX control - mac80211 tells the driver what to do 625 * (2) driver internal use (if applicable) 626 * (3) TX status information - driver tells mac80211 what happened 627 * 628 * @flags: transmit info flags, defined above 629 * @band: the band to transmit on (use for checking for races) 630 * @hw_queue: HW queue to put the frame on, skb_get_queue_mapping() gives the AC 631 * @ack_frame_id: internal frame ID for TX status, used internally 632 * @control: union for control data 633 * @status: union for status data 634 * @driver_data: array of driver_data pointers 635 * @ampdu_ack_len: number of acked aggregated frames. 636 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 637 * @ampdu_len: number of aggregated frames. 638 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 639 * @ack_signal: signal strength of the ACK frame 640 */ 641 struct ieee80211_tx_info { 642 /* common information */ 643 u32 flags; 644 u8 band; 645 646 u8 hw_queue; 647 648 u16 ack_frame_id; 649 650 union { 651 struct { 652 union { 653 /* rate control */ 654 struct { 655 struct ieee80211_tx_rate rates[ 656 IEEE80211_TX_MAX_RATES]; 657 s8 rts_cts_rate_idx; 658 /* 3 bytes free */ 659 }; 660 /* only needed before rate control */ 661 unsigned long jiffies; 662 }; 663 /* NB: vif can be NULL for injected frames */ 664 struct ieee80211_vif *vif; 665 struct ieee80211_key_conf *hw_key; 666 /* 8 bytes free */ 667 } control; 668 struct { 669 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 670 int ack_signal; 671 u8 ampdu_ack_len; 672 u8 ampdu_len; 673 u8 antenna; 674 /* 21 bytes free */ 675 } status; 676 struct { 677 struct ieee80211_tx_rate driver_rates[ 678 IEEE80211_TX_MAX_RATES]; 679 void *rate_driver_data[ 680 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 681 }; 682 void *driver_data[ 683 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 684 }; 685 }; 686 687 /** 688 * struct ieee80211_sched_scan_ies - scheduled scan IEs 689 * 690 * This structure is used to pass the appropriate IEs to be used in scheduled 691 * scans for all bands. It contains both the IEs passed from the userspace 692 * and the ones generated by mac80211. 693 * 694 * @ie: array with the IEs for each supported band 695 * @len: array with the total length of the IEs for each band 696 */ 697 struct ieee80211_sched_scan_ies { 698 u8 *ie[IEEE80211_NUM_BANDS]; 699 size_t len[IEEE80211_NUM_BANDS]; 700 }; 701 702 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 703 { 704 return (struct ieee80211_tx_info *)skb->cb; 705 } 706 707 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 708 { 709 return (struct ieee80211_rx_status *)skb->cb; 710 } 711 712 /** 713 * ieee80211_tx_info_clear_status - clear TX status 714 * 715 * @info: The &struct ieee80211_tx_info to be cleared. 716 * 717 * When the driver passes an skb back to mac80211, it must report 718 * a number of things in TX status. This function clears everything 719 * in the TX status but the rate control information (it does clear 720 * the count since you need to fill that in anyway). 721 * 722 * NOTE: You can only use this function if you do NOT use 723 * info->driver_data! Use info->rate_driver_data 724 * instead if you need only the less space that allows. 725 */ 726 static inline void 727 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 728 { 729 int i; 730 731 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 732 offsetof(struct ieee80211_tx_info, control.rates)); 733 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 734 offsetof(struct ieee80211_tx_info, driver_rates)); 735 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 736 /* clear the rate counts */ 737 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 738 info->status.rates[i].count = 0; 739 740 BUILD_BUG_ON( 741 offsetof(struct ieee80211_tx_info, status.ack_signal) != 20); 742 memset(&info->status.ampdu_ack_len, 0, 743 sizeof(struct ieee80211_tx_info) - 744 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 745 } 746 747 748 /** 749 * enum mac80211_rx_flags - receive flags 750 * 751 * These flags are used with the @flag member of &struct ieee80211_rx_status. 752 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 753 * Use together with %RX_FLAG_MMIC_STRIPPED. 754 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 755 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 756 * verification has been done by the hardware. 757 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 758 * If this flag is set, the stack cannot do any replay detection 759 * hence the driver or hardware will have to do that. 760 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 761 * the frame. 762 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 763 * the frame. 764 * @RX_FLAG_MACTIME_START: The timestamp passed in the RX status (@mactime 765 * field) is valid and contains the time the first symbol of the MPDU 766 * was received. This is useful in monitor mode and for proper IBSS 767 * merging. 768 * @RX_FLAG_MACTIME_END: The timestamp passed in the RX status (@mactime 769 * field) is valid and contains the time the last symbol of the MPDU 770 * (including FCS) was received. 771 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 772 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 773 * @RX_FLAG_VHT: VHT MCS was used and rate_index is MCS index 774 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 775 * @RX_FLAG_80MHZ: 80 MHz was used 776 * @RX_FLAG_80P80MHZ: 80+80 MHz was used 777 * @RX_FLAG_160MHZ: 160 MHz was used 778 * @RX_FLAG_SHORT_GI: Short guard interval was used 779 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 780 * Valid only for data frames (mainly A-MPDU) 781 * @RX_FLAG_HT_GF: This frame was received in a HT-greenfield transmission, if 782 * the driver fills this value it should add %IEEE80211_RADIOTAP_MCS_HAVE_FMT 783 * to hw.radiotap_mcs_details to advertise that fact 784 * @RX_FLAG_AMPDU_DETAILS: A-MPDU details are known, in particular the reference 785 * number (@ampdu_reference) must be populated and be a distinct number for 786 * each A-MPDU 787 * @RX_FLAG_AMPDU_REPORT_ZEROLEN: driver reports 0-length subframes 788 * @RX_FLAG_AMPDU_IS_ZEROLEN: This is a zero-length subframe, for 789 * monitoring purposes only 790 * @RX_FLAG_AMPDU_LAST_KNOWN: last subframe is known, should be set on all 791 * subframes of a single A-MPDU 792 * @RX_FLAG_AMPDU_IS_LAST: this subframe is the last subframe of the A-MPDU 793 * @RX_FLAG_AMPDU_DELIM_CRC_ERROR: A delimiter CRC error has been detected 794 * on this subframe 795 * @RX_FLAG_AMPDU_DELIM_CRC_KNOWN: The delimiter CRC field is known (the CRC 796 * is stored in the @ampdu_delimiter_crc field) 797 */ 798 enum mac80211_rx_flags { 799 RX_FLAG_MMIC_ERROR = BIT(0), 800 RX_FLAG_DECRYPTED = BIT(1), 801 RX_FLAG_MMIC_STRIPPED = BIT(3), 802 RX_FLAG_IV_STRIPPED = BIT(4), 803 RX_FLAG_FAILED_FCS_CRC = BIT(5), 804 RX_FLAG_FAILED_PLCP_CRC = BIT(6), 805 RX_FLAG_MACTIME_START = BIT(7), 806 RX_FLAG_SHORTPRE = BIT(8), 807 RX_FLAG_HT = BIT(9), 808 RX_FLAG_40MHZ = BIT(10), 809 RX_FLAG_SHORT_GI = BIT(11), 810 RX_FLAG_NO_SIGNAL_VAL = BIT(12), 811 RX_FLAG_HT_GF = BIT(13), 812 RX_FLAG_AMPDU_DETAILS = BIT(14), 813 RX_FLAG_AMPDU_REPORT_ZEROLEN = BIT(15), 814 RX_FLAG_AMPDU_IS_ZEROLEN = BIT(16), 815 RX_FLAG_AMPDU_LAST_KNOWN = BIT(17), 816 RX_FLAG_AMPDU_IS_LAST = BIT(18), 817 RX_FLAG_AMPDU_DELIM_CRC_ERROR = BIT(19), 818 RX_FLAG_AMPDU_DELIM_CRC_KNOWN = BIT(20), 819 RX_FLAG_MACTIME_END = BIT(21), 820 RX_FLAG_VHT = BIT(22), 821 RX_FLAG_80MHZ = BIT(23), 822 RX_FLAG_80P80MHZ = BIT(24), 823 RX_FLAG_160MHZ = BIT(25), 824 }; 825 826 /** 827 * struct ieee80211_rx_status - receive status 828 * 829 * The low-level driver should provide this information (the subset 830 * supported by hardware) to the 802.11 code with each received 831 * frame, in the skb's control buffer (cb). 832 * 833 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 834 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 835 * @device_timestamp: arbitrary timestamp for the device, mac80211 doesn't use 836 * it but can store it and pass it back to the driver for synchronisation 837 * @band: the active band when this frame was received 838 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 839 * @signal: signal strength when receiving this frame, either in dBm, in dB or 840 * unspecified depending on the hardware capabilities flags 841 * @IEEE80211_HW_SIGNAL_* 842 * @antenna: antenna used 843 * @rate_idx: index of data rate into band's supported rates or MCS index if 844 * HT or VHT is used (%RX_FLAG_HT/%RX_FLAG_VHT) 845 * @vht_nss: number of streams (VHT only) 846 * @flag: %RX_FLAG_* 847 * @rx_flags: internal RX flags for mac80211 848 * @ampdu_reference: A-MPDU reference number, must be a different value for 849 * each A-MPDU but the same for each subframe within one A-MPDU 850 * @ampdu_delimiter_crc: A-MPDU delimiter CRC 851 * @vendor_radiotap_bitmap: radiotap vendor namespace presence bitmap 852 * @vendor_radiotap_len: radiotap vendor namespace length 853 * @vendor_radiotap_align: radiotap vendor namespace alignment. Note 854 * that the actual data must be at the start of the SKB data 855 * already. 856 * @vendor_radiotap_oui: radiotap vendor namespace OUI 857 * @vendor_radiotap_subns: radiotap vendor sub namespace 858 */ 859 struct ieee80211_rx_status { 860 u64 mactime; 861 u32 device_timestamp; 862 u32 ampdu_reference; 863 u32 flag; 864 u32 vendor_radiotap_bitmap; 865 u16 vendor_radiotap_len; 866 u16 freq; 867 u8 rate_idx; 868 u8 vht_nss; 869 u8 rx_flags; 870 u8 band; 871 u8 antenna; 872 s8 signal; 873 u8 ampdu_delimiter_crc; 874 u8 vendor_radiotap_align; 875 u8 vendor_radiotap_oui[3]; 876 u8 vendor_radiotap_subns; 877 }; 878 879 /** 880 * enum ieee80211_conf_flags - configuration flags 881 * 882 * Flags to define PHY configuration options 883 * 884 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 885 * to determine for example whether to calculate timestamps for packets 886 * or not, do not use instead of filter flags! 887 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 888 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 889 * meaning that the hardware still wakes up for beacons, is able to 890 * transmit frames and receive the possible acknowledgment frames. 891 * Not to be confused with hardware specific wakeup/sleep states, 892 * driver is responsible for that. See the section "Powersave support" 893 * for more. 894 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 895 * the driver should be prepared to handle configuration requests but 896 * may turn the device off as much as possible. Typically, this flag will 897 * be set when an interface is set UP but not associated or scanning, but 898 * it can also be unset in that case when monitor interfaces are active. 899 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 900 * operating channel. 901 */ 902 enum ieee80211_conf_flags { 903 IEEE80211_CONF_MONITOR = (1<<0), 904 IEEE80211_CONF_PS = (1<<1), 905 IEEE80211_CONF_IDLE = (1<<2), 906 IEEE80211_CONF_OFFCHANNEL = (1<<3), 907 }; 908 909 910 /** 911 * enum ieee80211_conf_changed - denotes which configuration changed 912 * 913 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 914 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 915 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 916 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 917 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 918 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 919 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 920 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 921 * Note that this is only valid if channel contexts are not used, 922 * otherwise each channel context has the number of chains listed. 923 */ 924 enum ieee80211_conf_changed { 925 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 926 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 927 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 928 IEEE80211_CONF_CHANGE_PS = BIT(4), 929 IEEE80211_CONF_CHANGE_POWER = BIT(5), 930 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 931 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 932 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 933 }; 934 935 /** 936 * enum ieee80211_smps_mode - spatial multiplexing power save mode 937 * 938 * @IEEE80211_SMPS_AUTOMATIC: automatic 939 * @IEEE80211_SMPS_OFF: off 940 * @IEEE80211_SMPS_STATIC: static 941 * @IEEE80211_SMPS_DYNAMIC: dynamic 942 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 943 */ 944 enum ieee80211_smps_mode { 945 IEEE80211_SMPS_AUTOMATIC, 946 IEEE80211_SMPS_OFF, 947 IEEE80211_SMPS_STATIC, 948 IEEE80211_SMPS_DYNAMIC, 949 950 /* keep last */ 951 IEEE80211_SMPS_NUM_MODES, 952 }; 953 954 /** 955 * struct ieee80211_conf - configuration of the device 956 * 957 * This struct indicates how the driver shall configure the hardware. 958 * 959 * @flags: configuration flags defined above 960 * 961 * @listen_interval: listen interval in units of beacon interval 962 * @max_sleep_period: the maximum number of beacon intervals to sleep for 963 * before checking the beacon for a TIM bit (managed mode only); this 964 * value will be only achievable between DTIM frames, the hardware 965 * needs to check for the multicast traffic bit in DTIM beacons. 966 * This variable is valid only when the CONF_PS flag is set. 967 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 968 * in power saving. Power saving will not be enabled until a beacon 969 * has been received and the DTIM period is known. 970 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 971 * powersave documentation below. This variable is valid only when 972 * the CONF_PS flag is set. 973 * 974 * @power_level: requested transmit power (in dBm), backward compatibility 975 * value only that is set to the minimum of all interfaces 976 * 977 * @channel: the channel to tune to 978 * @channel_type: the channel (HT) type 979 * @radar_enabled: whether radar detection is enabled 980 * 981 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 982 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 983 * but actually means the number of transmissions not the number of retries 984 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 985 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 986 * number of transmissions not the number of retries 987 * 988 * @smps_mode: spatial multiplexing powersave mode; note that 989 * %IEEE80211_SMPS_STATIC is used when the device is not 990 * configured for an HT channel. 991 * Note that this is only valid if channel contexts are not used, 992 * otherwise each channel context has the number of chains listed. 993 */ 994 struct ieee80211_conf { 995 u32 flags; 996 int power_level, dynamic_ps_timeout; 997 int max_sleep_period; 998 999 u16 listen_interval; 1000 u8 ps_dtim_period; 1001 1002 u8 long_frame_max_tx_count, short_frame_max_tx_count; 1003 1004 struct ieee80211_channel *channel; 1005 enum nl80211_channel_type channel_type; 1006 bool radar_enabled; 1007 enum ieee80211_smps_mode smps_mode; 1008 }; 1009 1010 /** 1011 * struct ieee80211_channel_switch - holds the channel switch data 1012 * 1013 * The information provided in this structure is required for channel switch 1014 * operation. 1015 * 1016 * @timestamp: value in microseconds of the 64-bit Time Synchronization 1017 * Function (TSF) timer when the frame containing the channel switch 1018 * announcement was received. This is simply the rx.mactime parameter 1019 * the driver passed into mac80211. 1020 * @block_tx: Indicates whether transmission must be blocked before the 1021 * scheduled channel switch, as indicated by the AP. 1022 * @channel: the new channel to switch to 1023 * @count: the number of TBTT's until the channel switch event 1024 */ 1025 struct ieee80211_channel_switch { 1026 u64 timestamp; 1027 bool block_tx; 1028 struct ieee80211_channel *channel; 1029 u8 count; 1030 }; 1031 1032 /** 1033 * enum ieee80211_vif_flags - virtual interface flags 1034 * 1035 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 1036 * on this virtual interface to avoid unnecessary CPU wakeups 1037 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 1038 * monitoring on this virtual interface -- i.e. it can monitor 1039 * connection quality related parameters, such as the RSSI level and 1040 * provide notifications if configured trigger levels are reached. 1041 */ 1042 enum ieee80211_vif_flags { 1043 IEEE80211_VIF_BEACON_FILTER = BIT(0), 1044 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 1045 }; 1046 1047 /** 1048 * struct ieee80211_vif - per-interface data 1049 * 1050 * Data in this structure is continually present for driver 1051 * use during the life of a virtual interface. 1052 * 1053 * @type: type of this virtual interface 1054 * @bss_conf: BSS configuration for this interface, either our own 1055 * or the BSS we're associated to 1056 * @addr: address of this interface 1057 * @p2p: indicates whether this AP or STA interface is a p2p 1058 * interface, i.e. a GO or p2p-sta respectively 1059 * @driver_flags: flags/capabilities the driver has for this interface, 1060 * these need to be set (or cleared) when the interface is added 1061 * or, if supported by the driver, the interface type is changed 1062 * at runtime, mac80211 will never touch this field 1063 * @hw_queue: hardware queue for each AC 1064 * @cab_queue: content-after-beacon (DTIM beacon really) queue, AP mode only 1065 * @chanctx_conf: The channel context this interface is assigned to, or %NULL 1066 * when it is not assigned. This pointer is RCU-protected due to the TX 1067 * path needing to access it; even though the netdev carrier will always 1068 * be off when it is %NULL there can still be races and packets could be 1069 * processed after it switches back to %NULL. 1070 * @drv_priv: data area for driver use, will always be aligned to 1071 * sizeof(void *). 1072 */ 1073 struct ieee80211_vif { 1074 enum nl80211_iftype type; 1075 struct ieee80211_bss_conf bss_conf; 1076 u8 addr[ETH_ALEN]; 1077 bool p2p; 1078 1079 u8 cab_queue; 1080 u8 hw_queue[IEEE80211_NUM_ACS]; 1081 1082 struct ieee80211_chanctx_conf __rcu *chanctx_conf; 1083 1084 u32 driver_flags; 1085 1086 /* must be last */ 1087 u8 drv_priv[0] __aligned(sizeof(void *)); 1088 }; 1089 1090 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 1091 { 1092 #ifdef CONFIG_MAC80211_MESH 1093 return vif->type == NL80211_IFTYPE_MESH_POINT; 1094 #endif 1095 return false; 1096 } 1097 1098 /** 1099 * enum ieee80211_key_flags - key flags 1100 * 1101 * These flags are used for communication about keys between the driver 1102 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 1103 * 1104 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 1105 * that the STA this key will be used with could be using QoS. 1106 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 1107 * driver to indicate that it requires IV generation for this 1108 * particular key. 1109 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 1110 * the driver for a TKIP key if it requires Michael MIC 1111 * generation in software. 1112 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 1113 * that the key is pairwise rather then a shared key. 1114 * @IEEE80211_KEY_FLAG_SW_MGMT_TX: This flag should be set by the driver for a 1115 * CCMP key if it requires CCMP encryption of management frames (MFP) to 1116 * be done in software. 1117 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 1118 * if space should be prepared for the IV, but the IV 1119 * itself should not be generated. Do not set together with 1120 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 1121 * @IEEE80211_KEY_FLAG_RX_MGMT: This key will be used to decrypt received 1122 * management frames. The flag can help drivers that have a hardware 1123 * crypto implementation that doesn't deal with management frames 1124 * properly by allowing them to not upload the keys to hardware and 1125 * fall back to software crypto. Note that this flag deals only with 1126 * RX, if your crypto engine can't deal with TX you can also set the 1127 * %IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW. 1128 */ 1129 enum ieee80211_key_flags { 1130 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 1131 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 1132 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 1133 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 1134 IEEE80211_KEY_FLAG_SW_MGMT_TX = 1<<4, 1135 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 1136 IEEE80211_KEY_FLAG_RX_MGMT = 1<<6, 1137 }; 1138 1139 /** 1140 * struct ieee80211_key_conf - key information 1141 * 1142 * This key information is given by mac80211 to the driver by 1143 * the set_key() callback in &struct ieee80211_ops. 1144 * 1145 * @hw_key_idx: To be set by the driver, this is the key index the driver 1146 * wants to be given when a frame is transmitted and needs to be 1147 * encrypted in hardware. 1148 * @cipher: The key's cipher suite selector. 1149 * @flags: key flags, see &enum ieee80211_key_flags. 1150 * @keyidx: the key index (0-3) 1151 * @keylen: key material length 1152 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 1153 * data block: 1154 * - Temporal Encryption Key (128 bits) 1155 * - Temporal Authenticator Tx MIC Key (64 bits) 1156 * - Temporal Authenticator Rx MIC Key (64 bits) 1157 * @icv_len: The ICV length for this key type 1158 * @iv_len: The IV length for this key type 1159 */ 1160 struct ieee80211_key_conf { 1161 u32 cipher; 1162 u8 icv_len; 1163 u8 iv_len; 1164 u8 hw_key_idx; 1165 u8 flags; 1166 s8 keyidx; 1167 u8 keylen; 1168 u8 key[0]; 1169 }; 1170 1171 /** 1172 * enum set_key_cmd - key command 1173 * 1174 * Used with the set_key() callback in &struct ieee80211_ops, this 1175 * indicates whether a key is being removed or added. 1176 * 1177 * @SET_KEY: a key is set 1178 * @DISABLE_KEY: a key must be disabled 1179 */ 1180 enum set_key_cmd { 1181 SET_KEY, DISABLE_KEY, 1182 }; 1183 1184 /** 1185 * enum ieee80211_sta_state - station state 1186 * 1187 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 1188 * this is a special state for add/remove transitions 1189 * @IEEE80211_STA_NONE: station exists without special state 1190 * @IEEE80211_STA_AUTH: station is authenticated 1191 * @IEEE80211_STA_ASSOC: station is associated 1192 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 1193 */ 1194 enum ieee80211_sta_state { 1195 /* NOTE: These need to be ordered correctly! */ 1196 IEEE80211_STA_NOTEXIST, 1197 IEEE80211_STA_NONE, 1198 IEEE80211_STA_AUTH, 1199 IEEE80211_STA_ASSOC, 1200 IEEE80211_STA_AUTHORIZED, 1201 }; 1202 1203 /** 1204 * enum ieee80211_sta_rx_bandwidth - station RX bandwidth 1205 * @IEEE80211_STA_RX_BW_20: station can only receive 20 MHz 1206 * @IEEE80211_STA_RX_BW_40: station can receive up to 40 MHz 1207 * @IEEE80211_STA_RX_BW_80: station can receive up to 80 MHz 1208 * @IEEE80211_STA_RX_BW_160: station can receive up to 160 MHz 1209 * (including 80+80 MHz) 1210 * 1211 * Implementation note: 20 must be zero to be initialized 1212 * correctly, the values must be sorted. 1213 */ 1214 enum ieee80211_sta_rx_bandwidth { 1215 IEEE80211_STA_RX_BW_20 = 0, 1216 IEEE80211_STA_RX_BW_40, 1217 IEEE80211_STA_RX_BW_80, 1218 IEEE80211_STA_RX_BW_160, 1219 }; 1220 1221 /** 1222 * struct ieee80211_sta - station table entry 1223 * 1224 * A station table entry represents a station we are possibly 1225 * communicating with. Since stations are RCU-managed in 1226 * mac80211, any ieee80211_sta pointer you get access to must 1227 * either be protected by rcu_read_lock() explicitly or implicitly, 1228 * or you must take good care to not use such a pointer after a 1229 * call to your sta_remove callback that removed it. 1230 * 1231 * @addr: MAC address 1232 * @aid: AID we assigned to the station if we're an AP 1233 * @supp_rates: Bitmap of supported rates (per band) 1234 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1235 * @vht_cap: VHT capabilities of this STA; Not restricting any capabilities 1236 * of remote STA. Taking as is. 1237 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1238 * @drv_priv: data area for driver use, will always be aligned to 1239 * sizeof(void *), size is determined in hw information. 1240 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1241 * if wme is supported. 1242 * @max_sp: max Service Period. Only valid if wme is supported. 1243 * @bandwidth: current bandwidth the station can receive with 1244 * @rx_nss: in HT/VHT, the maximum number of spatial streams the 1245 * station can receive at the moment, changed by operating mode 1246 * notifications and capabilities. The value is only valid after 1247 * the station moves to associated state. 1248 * @smps_mode: current SMPS mode (off, static or dynamic) 1249 */ 1250 struct ieee80211_sta { 1251 u32 supp_rates[IEEE80211_NUM_BANDS]; 1252 u8 addr[ETH_ALEN]; 1253 u16 aid; 1254 struct ieee80211_sta_ht_cap ht_cap; 1255 struct ieee80211_sta_vht_cap vht_cap; 1256 bool wme; 1257 u8 uapsd_queues; 1258 u8 max_sp; 1259 u8 rx_nss; 1260 enum ieee80211_sta_rx_bandwidth bandwidth; 1261 enum ieee80211_smps_mode smps_mode; 1262 1263 /* must be last */ 1264 u8 drv_priv[0] __aligned(sizeof(void *)); 1265 }; 1266 1267 /** 1268 * enum sta_notify_cmd - sta notify command 1269 * 1270 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1271 * indicates if an associated station made a power state transition. 1272 * 1273 * @STA_NOTIFY_SLEEP: a station is now sleeping 1274 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1275 */ 1276 enum sta_notify_cmd { 1277 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1278 }; 1279 1280 /** 1281 * struct ieee80211_tx_control - TX control data 1282 * 1283 * @sta: station table entry, this sta pointer may be NULL and 1284 * it is not allowed to copy the pointer, due to RCU. 1285 */ 1286 struct ieee80211_tx_control { 1287 struct ieee80211_sta *sta; 1288 }; 1289 1290 /** 1291 * enum ieee80211_hw_flags - hardware flags 1292 * 1293 * These flags are used to indicate hardware capabilities to 1294 * the stack. Generally, flags here should have their meaning 1295 * done in a way that the simplest hardware doesn't need setting 1296 * any particular flags. There are some exceptions to this rule, 1297 * however, so you are advised to review these flags carefully. 1298 * 1299 * @IEEE80211_HW_HAS_RATE_CONTROL: 1300 * The hardware or firmware includes rate control, and cannot be 1301 * controlled by the stack. As such, no rate control algorithm 1302 * should be instantiated, and the TX rate reported to userspace 1303 * will be taken from the TX status instead of the rate control 1304 * algorithm. 1305 * Note that this requires that the driver implement a number of 1306 * callbacks so it has the correct information, it needs to have 1307 * the @set_rts_threshold callback and must look at the BSS config 1308 * @use_cts_prot for G/N protection, @use_short_slot for slot 1309 * timing in 2.4 GHz and @use_short_preamble for preambles for 1310 * CCK frames. 1311 * 1312 * @IEEE80211_HW_RX_INCLUDES_FCS: 1313 * Indicates that received frames passed to the stack include 1314 * the FCS at the end. 1315 * 1316 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1317 * Some wireless LAN chipsets buffer broadcast/multicast frames 1318 * for power saving stations in the hardware/firmware and others 1319 * rely on the host system for such buffering. This option is used 1320 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1321 * multicast frames when there are power saving stations so that 1322 * the driver can fetch them with ieee80211_get_buffered_bc(). 1323 * 1324 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1325 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1326 * 1327 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1328 * Hardware is not capable of receiving frames with short preamble on 1329 * the 2.4 GHz band. 1330 * 1331 * @IEEE80211_HW_SIGNAL_UNSPEC: 1332 * Hardware can provide signal values but we don't know its units. We 1333 * expect values between 0 and @max_signal. 1334 * If possible please provide dB or dBm instead. 1335 * 1336 * @IEEE80211_HW_SIGNAL_DBM: 1337 * Hardware gives signal values in dBm, decibel difference from 1338 * one milliwatt. This is the preferred method since it is standardized 1339 * between different devices. @max_signal does not need to be set. 1340 * 1341 * @IEEE80211_HW_SPECTRUM_MGMT: 1342 * Hardware supports spectrum management defined in 802.11h 1343 * Measurement, Channel Switch, Quieting, TPC 1344 * 1345 * @IEEE80211_HW_AMPDU_AGGREGATION: 1346 * Hardware supports 11n A-MPDU aggregation. 1347 * 1348 * @IEEE80211_HW_SUPPORTS_PS: 1349 * Hardware has power save support (i.e. can go to sleep). 1350 * 1351 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1352 * Hardware requires nullfunc frame handling in stack, implies 1353 * stack support for dynamic PS. 1354 * 1355 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1356 * Hardware has support for dynamic PS. 1357 * 1358 * @IEEE80211_HW_MFP_CAPABLE: 1359 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1360 * 1361 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1362 * Hardware supports static spatial multiplexing powersave, 1363 * ie. can turn off all but one chain even on HT connections 1364 * that should be using more chains. 1365 * 1366 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1367 * Hardware supports dynamic spatial multiplexing powersave, 1368 * ie. can turn off all but one chain and then wake the rest 1369 * up as required after, for example, rts/cts handshake. 1370 * 1371 * @IEEE80211_HW_SUPPORTS_UAPSD: 1372 * Hardware supports Unscheduled Automatic Power Save Delivery 1373 * (U-APSD) in managed mode. The mode is configured with 1374 * conf_tx() operation. 1375 * 1376 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1377 * Hardware can provide ack status reports of Tx frames to 1378 * the stack. 1379 * 1380 * @IEEE80211_HW_CONNECTION_MONITOR: 1381 * The hardware performs its own connection monitoring, including 1382 * periodic keep-alives to the AP and probing the AP on beacon loss. 1383 * When this flag is set, signaling beacon-loss will cause an immediate 1384 * change to disassociated state. 1385 * 1386 * @IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC: 1387 * This device needs to get data from beacon before association (i.e. 1388 * dtim_period). 1389 * 1390 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1391 * per-station GTKs as used by IBSS RSN or during fast transition. If 1392 * the device doesn't support per-station GTKs, but can be asked not 1393 * to decrypt group addressed frames, then IBSS RSN support is still 1394 * possible but software crypto will be used. Advertise the wiphy flag 1395 * only in that case. 1396 * 1397 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1398 * autonomously manages the PS status of connected stations. When 1399 * this flag is set mac80211 will not trigger PS mode for connected 1400 * stations based on the PM bit of incoming frames. 1401 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1402 * the PS mode of connected stations. 1403 * 1404 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1405 * setup strictly in HW. mac80211 should not attempt to do this in 1406 * software. 1407 * 1408 * @IEEE80211_HW_WANT_MONITOR_VIF: The driver would like to be informed of 1409 * a virtual monitor interface when monitor interfaces are the only 1410 * active interfaces. 1411 * 1412 * @IEEE80211_HW_QUEUE_CONTROL: The driver wants to control per-interface 1413 * queue mapping in order to use different queues (not just one per AC) 1414 * for different virtual interfaces. See the doc section on HW queue 1415 * control for more details. 1416 * 1417 * @IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF: Use the P2P Device address for any 1418 * P2P Interface. This will be honoured even if more than one interface 1419 * is supported. 1420 * 1421 * @IEEE80211_HW_TIMING_BEACON_ONLY: Use sync timing from beacon frames 1422 * only, to allow getting TBTT of a DTIM beacon. 1423 */ 1424 enum ieee80211_hw_flags { 1425 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1426 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1427 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1428 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1429 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1430 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1431 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1432 IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC = 1<<7, 1433 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1434 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1435 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1436 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1437 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1438 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1439 IEEE80211_HW_WANT_MONITOR_VIF = 1<<14, 1440 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1441 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1442 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1443 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1444 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1445 IEEE80211_HW_QUEUE_CONTROL = 1<<20, 1446 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1447 IEEE80211_HW_AP_LINK_PS = 1<<22, 1448 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1449 IEEE80211_HW_P2P_DEV_ADDR_FOR_INTF = 1<<25, 1450 IEEE80211_HW_TIMING_BEACON_ONLY = 1<<26, 1451 }; 1452 1453 /** 1454 * struct ieee80211_hw - hardware information and state 1455 * 1456 * This structure contains the configuration and hardware 1457 * information for an 802.11 PHY. 1458 * 1459 * @wiphy: This points to the &struct wiphy allocated for this 1460 * 802.11 PHY. You must fill in the @perm_addr and @dev 1461 * members of this structure using SET_IEEE80211_DEV() 1462 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1463 * bands (with channels, bitrates) are registered here. 1464 * 1465 * @conf: &struct ieee80211_conf, device configuration, don't use. 1466 * 1467 * @priv: pointer to private area that was allocated for driver use 1468 * along with this structure. 1469 * 1470 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1471 * 1472 * @extra_tx_headroom: headroom to reserve in each transmit skb 1473 * for use by the driver (e.g. for transmit headers.) 1474 * 1475 * @channel_change_time: time (in microseconds) it takes to change channels. 1476 * 1477 * @max_signal: Maximum value for signal (rssi) in RX information, used 1478 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1479 * 1480 * @max_listen_interval: max listen interval in units of beacon interval 1481 * that HW supports 1482 * 1483 * @queues: number of available hardware transmit queues for 1484 * data packets. WMM/QoS requires at least four, these 1485 * queues need to have configurable access parameters. 1486 * 1487 * @rate_control_algorithm: rate control algorithm for this hardware. 1488 * If unset (NULL), the default algorithm will be used. Must be 1489 * set before calling ieee80211_register_hw(). 1490 * 1491 * @vif_data_size: size (in bytes) of the drv_priv data area 1492 * within &struct ieee80211_vif. 1493 * @sta_data_size: size (in bytes) of the drv_priv data area 1494 * within &struct ieee80211_sta. 1495 * @chanctx_data_size: size (in bytes) of the drv_priv data area 1496 * within &struct ieee80211_chanctx_conf. 1497 * 1498 * @max_rates: maximum number of alternate rate retry stages the hw 1499 * can handle. 1500 * @max_report_rates: maximum number of alternate rate retry stages 1501 * the hw can report back. 1502 * @max_rate_tries: maximum number of tries for each stage 1503 * 1504 * @napi_weight: weight used for NAPI polling. You must specify an 1505 * appropriate value here if a napi_poll operation is provided 1506 * by your driver. 1507 * 1508 * @max_rx_aggregation_subframes: maximum buffer size (number of 1509 * sub-frames) to be used for A-MPDU block ack receiver 1510 * aggregation. 1511 * This is only relevant if the device has restrictions on the 1512 * number of subframes, if it relies on mac80211 to do reordering 1513 * it shouldn't be set. 1514 * 1515 * @max_tx_aggregation_subframes: maximum number of subframes in an 1516 * aggregate an HT driver will transmit, used by the peer as a 1517 * hint to size its reorder buffer. 1518 * 1519 * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX 1520 * (if %IEEE80211_HW_QUEUE_CONTROL is set) 1521 * 1522 * @radiotap_mcs_details: lists which MCS information can the HW 1523 * reports, by default it is set to _MCS, _GI and _BW but doesn't 1524 * include _FMT. Use %IEEE80211_RADIOTAP_MCS_HAVE_* values, only 1525 * adding _BW is supported today. 1526 * 1527 * @radiotap_vht_details: lists which VHT MCS information the HW reports, 1528 * the default is _GI | _BANDWIDTH. 1529 * Use the %IEEE80211_RADIOTAP_VHT_KNOWN_* values. 1530 * 1531 * @netdev_features: netdev features to be set in each netdev created 1532 * from this HW. Note only HW checksum features are currently 1533 * compatible with mac80211. Other feature bits will be rejected. 1534 */ 1535 struct ieee80211_hw { 1536 struct ieee80211_conf conf; 1537 struct wiphy *wiphy; 1538 const char *rate_control_algorithm; 1539 void *priv; 1540 u32 flags; 1541 unsigned int extra_tx_headroom; 1542 int channel_change_time; 1543 int vif_data_size; 1544 int sta_data_size; 1545 int chanctx_data_size; 1546 int napi_weight; 1547 u16 queues; 1548 u16 max_listen_interval; 1549 s8 max_signal; 1550 u8 max_rates; 1551 u8 max_report_rates; 1552 u8 max_rate_tries; 1553 u8 max_rx_aggregation_subframes; 1554 u8 max_tx_aggregation_subframes; 1555 u8 offchannel_tx_hw_queue; 1556 u8 radiotap_mcs_details; 1557 u16 radiotap_vht_details; 1558 netdev_features_t netdev_features; 1559 }; 1560 1561 /** 1562 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1563 * 1564 * @wiphy: the &struct wiphy which we want to query 1565 * 1566 * mac80211 drivers can use this to get to their respective 1567 * &struct ieee80211_hw. Drivers wishing to get to their own private 1568 * structure can then access it via hw->priv. Note that mac802111 drivers should 1569 * not use wiphy_priv() to try to get their private driver structure as this 1570 * is already used internally by mac80211. 1571 * 1572 * Return: The mac80211 driver hw struct of @wiphy. 1573 */ 1574 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1575 1576 /** 1577 * SET_IEEE80211_DEV - set device for 802.11 hardware 1578 * 1579 * @hw: the &struct ieee80211_hw to set the device for 1580 * @dev: the &struct device of this 802.11 device 1581 */ 1582 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1583 { 1584 set_wiphy_dev(hw->wiphy, dev); 1585 } 1586 1587 /** 1588 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1589 * 1590 * @hw: the &struct ieee80211_hw to set the MAC address for 1591 * @addr: the address to set 1592 */ 1593 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1594 { 1595 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1596 } 1597 1598 static inline struct ieee80211_rate * 1599 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1600 const struct ieee80211_tx_info *c) 1601 { 1602 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1603 return NULL; 1604 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1605 } 1606 1607 static inline struct ieee80211_rate * 1608 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1609 const struct ieee80211_tx_info *c) 1610 { 1611 if (c->control.rts_cts_rate_idx < 0) 1612 return NULL; 1613 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1614 } 1615 1616 static inline struct ieee80211_rate * 1617 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1618 const struct ieee80211_tx_info *c, int idx) 1619 { 1620 if (c->control.rates[idx + 1].idx < 0) 1621 return NULL; 1622 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1623 } 1624 1625 /** 1626 * ieee80211_free_txskb - free TX skb 1627 * @hw: the hardware 1628 * @skb: the skb 1629 * 1630 * Free a transmit skb. Use this funtion when some failure 1631 * to transmit happened and thus status cannot be reported. 1632 */ 1633 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1634 1635 /** 1636 * DOC: Hardware crypto acceleration 1637 * 1638 * mac80211 is capable of taking advantage of many hardware 1639 * acceleration designs for encryption and decryption operations. 1640 * 1641 * The set_key() callback in the &struct ieee80211_ops for a given 1642 * device is called to enable hardware acceleration of encryption and 1643 * decryption. The callback takes a @sta parameter that will be NULL 1644 * for default keys or keys used for transmission only, or point to 1645 * the station information for the peer for individual keys. 1646 * Multiple transmission keys with the same key index may be used when 1647 * VLANs are configured for an access point. 1648 * 1649 * When transmitting, the TX control data will use the @hw_key_idx 1650 * selected by the driver by modifying the &struct ieee80211_key_conf 1651 * pointed to by the @key parameter to the set_key() function. 1652 * 1653 * The set_key() call for the %SET_KEY command should return 0 if 1654 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1655 * added; if you return 0 then hw_key_idx must be assigned to the 1656 * hardware key index, you are free to use the full u8 range. 1657 * 1658 * When the cmd is %DISABLE_KEY then it must succeed. 1659 * 1660 * Note that it is permissible to not decrypt a frame even if a key 1661 * for it has been uploaded to hardware, the stack will not make any 1662 * decision based on whether a key has been uploaded or not but rather 1663 * based on the receive flags. 1664 * 1665 * The &struct ieee80211_key_conf structure pointed to by the @key 1666 * parameter is guaranteed to be valid until another call to set_key() 1667 * removes it, but it can only be used as a cookie to differentiate 1668 * keys. 1669 * 1670 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1671 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1672 * handler. 1673 * The update_tkip_key() call updates the driver with the new phase 1 key. 1674 * This happens every time the iv16 wraps around (every 65536 packets). The 1675 * set_key() call will happen only once for each key (unless the AP did 1676 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1677 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1678 * handler is software decryption with wrap around of iv16. 1679 * 1680 * The set_default_unicast_key() call updates the default WEP key index 1681 * configured to the hardware for WEP encryption type. This is required 1682 * for devices that support offload of data packets (e.g. ARP responses). 1683 */ 1684 1685 /** 1686 * DOC: Powersave support 1687 * 1688 * mac80211 has support for various powersave implementations. 1689 * 1690 * First, it can support hardware that handles all powersaving by itself, 1691 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1692 * flag. In that case, it will be told about the desired powersave mode 1693 * with the %IEEE80211_CONF_PS flag depending on the association status. 1694 * The hardware must take care of sending nullfunc frames when necessary, 1695 * i.e. when entering and leaving powersave mode. The hardware is required 1696 * to look at the AID in beacons and signal to the AP that it woke up when 1697 * it finds traffic directed to it. 1698 * 1699 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1700 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1701 * with hardware wakeup and sleep states. Driver is responsible for waking 1702 * up the hardware before issuing commands to the hardware and putting it 1703 * back to sleep at appropriate times. 1704 * 1705 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1706 * buffered multicast/broadcast frames after the beacon. Also it must be 1707 * possible to send frames and receive the acknowledment frame. 1708 * 1709 * Other hardware designs cannot send nullfunc frames by themselves and also 1710 * need software support for parsing the TIM bitmap. This is also supported 1711 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1712 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1713 * required to pass up beacons. The hardware is still required to handle 1714 * waking up for multicast traffic; if it cannot the driver must handle that 1715 * as best as it can, mac80211 is too slow to do that. 1716 * 1717 * Dynamic powersave is an extension to normal powersave in which the 1718 * hardware stays awake for a user-specified period of time after sending a 1719 * frame so that reply frames need not be buffered and therefore delayed to 1720 * the next wakeup. It's compromise of getting good enough latency when 1721 * there's data traffic and still saving significantly power in idle 1722 * periods. 1723 * 1724 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1725 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1726 * flag and mac80211 will handle everything automatically. Additionally, 1727 * hardware having support for the dynamic PS feature may set the 1728 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1729 * dynamic PS mode itself. The driver needs to look at the 1730 * @dynamic_ps_timeout hardware configuration value and use it that value 1731 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1732 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1733 * enabled whenever user has enabled powersave. 1734 * 1735 * Driver informs U-APSD client support by enabling 1736 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1737 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1738 * Nullfunc frames and stay awake until the service period has ended. To 1739 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1740 * from that AC are transmitted with powersave enabled. 1741 * 1742 * Note: U-APSD client mode is not yet supported with 1743 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1744 */ 1745 1746 /** 1747 * DOC: Beacon filter support 1748 * 1749 * Some hardware have beacon filter support to reduce host cpu wakeups 1750 * which will reduce system power consumption. It usually works so that 1751 * the firmware creates a checksum of the beacon but omits all constantly 1752 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1753 * beacon is forwarded to the host, otherwise it will be just dropped. That 1754 * way the host will only receive beacons where some relevant information 1755 * (for example ERP protection or WMM settings) have changed. 1756 * 1757 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1758 * interface capability. The driver needs to enable beacon filter support 1759 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1760 * power save is enabled, the stack will not check for beacon loss and the 1761 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1762 * 1763 * The time (or number of beacons missed) until the firmware notifies the 1764 * driver of a beacon loss event (which in turn causes the driver to call 1765 * ieee80211_beacon_loss()) should be configurable and will be controlled 1766 * by mac80211 and the roaming algorithm in the future. 1767 * 1768 * Since there may be constantly changing information elements that nothing 1769 * in the software stack cares about, we will, in the future, have mac80211 1770 * tell the driver which information elements are interesting in the sense 1771 * that we want to see changes in them. This will include 1772 * - a list of information element IDs 1773 * - a list of OUIs for the vendor information element 1774 * 1775 * Ideally, the hardware would filter out any beacons without changes in the 1776 * requested elements, but if it cannot support that it may, at the expense 1777 * of some efficiency, filter out only a subset. For example, if the device 1778 * doesn't support checking for OUIs it should pass up all changes in all 1779 * vendor information elements. 1780 * 1781 * Note that change, for the sake of simplification, also includes information 1782 * elements appearing or disappearing from the beacon. 1783 * 1784 * Some hardware supports an "ignore list" instead, just make sure nothing 1785 * that was requested is on the ignore list, and include commonly changing 1786 * information element IDs in the ignore list, for example 11 (BSS load) and 1787 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1788 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1789 * it could also include some currently unused IDs. 1790 * 1791 * 1792 * In addition to these capabilities, hardware should support notifying the 1793 * host of changes in the beacon RSSI. This is relevant to implement roaming 1794 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1795 * the received data packets). This can consist in notifying the host when 1796 * the RSSI changes significantly or when it drops below or rises above 1797 * configurable thresholds. In the future these thresholds will also be 1798 * configured by mac80211 (which gets them from userspace) to implement 1799 * them as the roaming algorithm requires. 1800 * 1801 * If the hardware cannot implement this, the driver should ask it to 1802 * periodically pass beacon frames to the host so that software can do the 1803 * signal strength threshold checking. 1804 */ 1805 1806 /** 1807 * DOC: Spatial multiplexing power save 1808 * 1809 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1810 * power in an 802.11n implementation. For details on the mechanism 1811 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1812 * "11.2.3 SM power save". 1813 * 1814 * The mac80211 implementation is capable of sending action frames 1815 * to update the AP about the station's SMPS mode, and will instruct 1816 * the driver to enter the specific mode. It will also announce the 1817 * requested SMPS mode during the association handshake. Hardware 1818 * support for this feature is required, and can be indicated by 1819 * hardware flags. 1820 * 1821 * The default mode will be "automatic", which nl80211/cfg80211 1822 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1823 * turned off otherwise. 1824 * 1825 * To support this feature, the driver must set the appropriate 1826 * hardware support flags, and handle the SMPS flag to the config() 1827 * operation. It will then with this mechanism be instructed to 1828 * enter the requested SMPS mode while associated to an HT AP. 1829 */ 1830 1831 /** 1832 * DOC: Frame filtering 1833 * 1834 * mac80211 requires to see many management frames for proper 1835 * operation, and users may want to see many more frames when 1836 * in monitor mode. However, for best CPU usage and power consumption, 1837 * having as few frames as possible percolate through the stack is 1838 * desirable. Hence, the hardware should filter as much as possible. 1839 * 1840 * To achieve this, mac80211 uses filter flags (see below) to tell 1841 * the driver's configure_filter() function which frames should be 1842 * passed to mac80211 and which should be filtered out. 1843 * 1844 * Before configure_filter() is invoked, the prepare_multicast() 1845 * callback is invoked with the parameters @mc_count and @mc_list 1846 * for the combined multicast address list of all virtual interfaces. 1847 * It's use is optional, and it returns a u64 that is passed to 1848 * configure_filter(). Additionally, configure_filter() has the 1849 * arguments @changed_flags telling which flags were changed and 1850 * @total_flags with the new flag states. 1851 * 1852 * If your device has no multicast address filters your driver will 1853 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1854 * parameter to see whether multicast frames should be accepted 1855 * or dropped. 1856 * 1857 * All unsupported flags in @total_flags must be cleared. 1858 * Hardware does not support a flag if it is incapable of _passing_ 1859 * the frame to the stack. Otherwise the driver must ignore 1860 * the flag, but not clear it. 1861 * You must _only_ clear the flag (announce no support for the 1862 * flag to mac80211) if you are not able to pass the packet type 1863 * to the stack (so the hardware always filters it). 1864 * So for example, you should clear @FIF_CONTROL, if your hardware 1865 * always filters control frames. If your hardware always passes 1866 * control frames to the kernel and is incapable of filtering them, 1867 * you do _not_ clear the @FIF_CONTROL flag. 1868 * This rule applies to all other FIF flags as well. 1869 */ 1870 1871 /** 1872 * DOC: AP support for powersaving clients 1873 * 1874 * In order to implement AP and P2P GO modes, mac80211 has support for 1875 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1876 * There currently is no support for sAPSD. 1877 * 1878 * There is one assumption that mac80211 makes, namely that a client 1879 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1880 * Both are supported, and both can be used by the same client, but 1881 * they can't be used concurrently by the same client. This simplifies 1882 * the driver code. 1883 * 1884 * The first thing to keep in mind is that there is a flag for complete 1885 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1886 * mac80211 expects the driver to handle most of the state machine for 1887 * powersaving clients and will ignore the PM bit in incoming frames. 1888 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1889 * stations' powersave transitions. In this mode, mac80211 also doesn't 1890 * handle PS-Poll/uAPSD. 1891 * 1892 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1893 * PM bit in incoming frames for client powersave transitions. When a 1894 * station goes to sleep, we will stop transmitting to it. There is, 1895 * however, a race condition: a station might go to sleep while there is 1896 * data buffered on hardware queues. If the device has support for this 1897 * it will reject frames, and the driver should give the frames back to 1898 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1899 * cause mac80211 to retry the frame when the station wakes up. The 1900 * driver is also notified of powersave transitions by calling its 1901 * @sta_notify callback. 1902 * 1903 * When the station is asleep, it has three choices: it can wake up, 1904 * it can PS-Poll, or it can possibly start a uAPSD service period. 1905 * Waking up is implemented by simply transmitting all buffered (and 1906 * filtered) frames to the station. This is the easiest case. When 1907 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1908 * will inform the driver of this with the @allow_buffered_frames 1909 * callback; this callback is optional. mac80211 will then transmit 1910 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1911 * on each frame. The last frame in the service period (or the only 1912 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1913 * indicate that it ends the service period; as this frame must have 1914 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1915 * When TX status is reported for this frame, the service period is 1916 * marked has having ended and a new one can be started by the peer. 1917 * 1918 * Additionally, non-bufferable MMPDUs can also be transmitted by 1919 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1920 * 1921 * Another race condition can happen on some devices like iwlwifi 1922 * when there are frames queued for the station and it wakes up 1923 * or polls; the frames that are already queued could end up being 1924 * transmitted first instead, causing reordering and/or wrong 1925 * processing of the EOSP. The cause is that allowing frames to be 1926 * transmitted to a certain station is out-of-band communication to 1927 * the device. To allow this problem to be solved, the driver can 1928 * call ieee80211_sta_block_awake() if frames are buffered when it 1929 * is notified that the station went to sleep. When all these frames 1930 * have been filtered (see above), it must call the function again 1931 * to indicate that the station is no longer blocked. 1932 * 1933 * If the driver buffers frames in the driver for aggregation in any 1934 * way, it must use the ieee80211_sta_set_buffered() call when it is 1935 * notified of the station going to sleep to inform mac80211 of any 1936 * TIDs that have frames buffered. Note that when a station wakes up 1937 * this information is reset (hence the requirement to call it when 1938 * informed of the station going to sleep). Then, when a service 1939 * period starts for any reason, @release_buffered_frames is called 1940 * with the number of frames to be released and which TIDs they are 1941 * to come from. In this case, the driver is responsible for setting 1942 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1943 * to help the @more_data paramter is passed to tell the driver if 1944 * there is more data on other TIDs -- the TIDs to release frames 1945 * from are ignored since mac80211 doesn't know how many frames the 1946 * buffers for those TIDs contain. 1947 * 1948 * If the driver also implement GO mode, where absence periods may 1949 * shorten service periods (or abort PS-Poll responses), it must 1950 * filter those response frames except in the case of frames that 1951 * are buffered in the driver -- those must remain buffered to avoid 1952 * reordering. Because it is possible that no frames are released 1953 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1954 * to indicate to mac80211 that the service period ended anyway. 1955 * 1956 * Finally, if frames from multiple TIDs are released from mac80211 1957 * but the driver might reorder them, it must clear & set the flags 1958 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1959 * and also take care of the EOSP and MORE_DATA bits in the frame. 1960 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1961 */ 1962 1963 /** 1964 * DOC: HW queue control 1965 * 1966 * Before HW queue control was introduced, mac80211 only had a single static 1967 * assignment of per-interface AC software queues to hardware queues. This 1968 * was problematic for a few reasons: 1969 * 1) off-channel transmissions might get stuck behind other frames 1970 * 2) multiple virtual interfaces couldn't be handled correctly 1971 * 3) after-DTIM frames could get stuck behind other frames 1972 * 1973 * To solve this, hardware typically uses multiple different queues for all 1974 * the different usages, and this needs to be propagated into mac80211 so it 1975 * won't have the same problem with the software queues. 1976 * 1977 * Therefore, mac80211 now offers the %IEEE80211_HW_QUEUE_CONTROL capability 1978 * flag that tells it that the driver implements its own queue control. To do 1979 * so, the driver will set up the various queues in each &struct ieee80211_vif 1980 * and the offchannel queue in &struct ieee80211_hw. In response, mac80211 will 1981 * use those queue IDs in the hw_queue field of &struct ieee80211_tx_info and 1982 * if necessary will queue the frame on the right software queue that mirrors 1983 * the hardware queue. 1984 * Additionally, the driver has to then use these HW queue IDs for the queue 1985 * management functions (ieee80211_stop_queue() et al.) 1986 * 1987 * The driver is free to set up the queue mappings as needed, multiple virtual 1988 * interfaces may map to the same hardware queues if needed. The setup has to 1989 * happen during add_interface or change_interface callbacks. For example, a 1990 * driver supporting station+station and station+AP modes might decide to have 1991 * 10 hardware queues to handle different scenarios: 1992 * 1993 * 4 AC HW queues for 1st vif: 0, 1, 2, 3 1994 * 4 AC HW queues for 2nd vif: 4, 5, 6, 7 1995 * after-DTIM queue for AP: 8 1996 * off-channel queue: 9 1997 * 1998 * It would then set up the hardware like this: 1999 * hw.offchannel_tx_hw_queue = 9 2000 * 2001 * and the first virtual interface that is added as follows: 2002 * vif.hw_queue[IEEE80211_AC_VO] = 0 2003 * vif.hw_queue[IEEE80211_AC_VI] = 1 2004 * vif.hw_queue[IEEE80211_AC_BE] = 2 2005 * vif.hw_queue[IEEE80211_AC_BK] = 3 2006 * vif.cab_queue = 8 // if AP mode, otherwise %IEEE80211_INVAL_HW_QUEUE 2007 * and the second virtual interface with 4-7. 2008 * 2009 * If queue 6 gets full, for example, mac80211 would only stop the second 2010 * virtual interface's BE queue since virtual interface queues are per AC. 2011 * 2012 * Note that the vif.cab_queue value should be set to %IEEE80211_INVAL_HW_QUEUE 2013 * whenever the queue is not used (i.e. the interface is not in AP mode) if the 2014 * queue could potentially be shared since mac80211 will look at cab_queue when 2015 * a queue is stopped/woken even if the interface is not in AP mode. 2016 */ 2017 2018 /** 2019 * enum ieee80211_filter_flags - hardware filter flags 2020 * 2021 * These flags determine what the filter in hardware should be 2022 * programmed to let through and what should not be passed to the 2023 * stack. It is always safe to pass more frames than requested, 2024 * but this has negative impact on power consumption. 2025 * 2026 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 2027 * think of the BSS as your network segment and then this corresponds 2028 * to the regular ethernet device promiscuous mode. 2029 * 2030 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 2031 * by the user or if the hardware is not capable of filtering by 2032 * multicast address. 2033 * 2034 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 2035 * %RX_FLAG_FAILED_FCS_CRC for them) 2036 * 2037 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 2038 * the %RX_FLAG_FAILED_PLCP_CRC for them 2039 * 2040 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 2041 * to the hardware that it should not filter beacons or probe responses 2042 * by BSSID. Filtering them can greatly reduce the amount of processing 2043 * mac80211 needs to do and the amount of CPU wakeups, so you should 2044 * honour this flag if possible. 2045 * 2046 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 2047 * is not set then only those addressed to this station. 2048 * 2049 * @FIF_OTHER_BSS: pass frames destined to other BSSes 2050 * 2051 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 2052 * those addressed to this station. 2053 * 2054 * @FIF_PROBE_REQ: pass probe request frames 2055 */ 2056 enum ieee80211_filter_flags { 2057 FIF_PROMISC_IN_BSS = 1<<0, 2058 FIF_ALLMULTI = 1<<1, 2059 FIF_FCSFAIL = 1<<2, 2060 FIF_PLCPFAIL = 1<<3, 2061 FIF_BCN_PRBRESP_PROMISC = 1<<4, 2062 FIF_CONTROL = 1<<5, 2063 FIF_OTHER_BSS = 1<<6, 2064 FIF_PSPOLL = 1<<7, 2065 FIF_PROBE_REQ = 1<<8, 2066 }; 2067 2068 /** 2069 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 2070 * 2071 * These flags are used with the ampdu_action() callback in 2072 * &struct ieee80211_ops to indicate which action is needed. 2073 * 2074 * Note that drivers MUST be able to deal with a TX aggregation 2075 * session being stopped even before they OK'ed starting it by 2076 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 2077 * might receive the addBA frame and send a delBA right away! 2078 * 2079 * @IEEE80211_AMPDU_RX_START: start RX aggregation 2080 * @IEEE80211_AMPDU_RX_STOP: stop RX aggregation 2081 * @IEEE80211_AMPDU_TX_START: start TX aggregation 2082 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 2083 * @IEEE80211_AMPDU_TX_STOP_CONT: stop TX aggregation but continue transmitting 2084 * queued packets, now unaggregated. After all packets are transmitted the 2085 * driver has to call ieee80211_stop_tx_ba_cb_irqsafe(). 2086 * @IEEE80211_AMPDU_TX_STOP_FLUSH: stop TX aggregation and flush all packets, 2087 * called when the station is removed. There's no need or reason to call 2088 * ieee80211_stop_tx_ba_cb_irqsafe() in this case as mac80211 assumes the 2089 * session is gone and removes the station. 2090 * @IEEE80211_AMPDU_TX_STOP_FLUSH_CONT: called when TX aggregation is stopped 2091 * but the driver hasn't called ieee80211_stop_tx_ba_cb_irqsafe() yet and 2092 * now the connection is dropped and the station will be removed. Drivers 2093 * should clean up and drop remaining packets when this is called. 2094 */ 2095 enum ieee80211_ampdu_mlme_action { 2096 IEEE80211_AMPDU_RX_START, 2097 IEEE80211_AMPDU_RX_STOP, 2098 IEEE80211_AMPDU_TX_START, 2099 IEEE80211_AMPDU_TX_STOP_CONT, 2100 IEEE80211_AMPDU_TX_STOP_FLUSH, 2101 IEEE80211_AMPDU_TX_STOP_FLUSH_CONT, 2102 IEEE80211_AMPDU_TX_OPERATIONAL, 2103 }; 2104 2105 /** 2106 * enum ieee80211_frame_release_type - frame release reason 2107 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 2108 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 2109 * frame received on trigger-enabled AC 2110 */ 2111 enum ieee80211_frame_release_type { 2112 IEEE80211_FRAME_RELEASE_PSPOLL, 2113 IEEE80211_FRAME_RELEASE_UAPSD, 2114 }; 2115 2116 /** 2117 * enum ieee80211_rate_control_changed - flags to indicate what changed 2118 * 2119 * @IEEE80211_RC_BW_CHANGED: The bandwidth that can be used to transmit 2120 * to this station changed. The actual bandwidth is in the station 2121 * information -- for HT20/40 the IEEE80211_HT_CAP_SUP_WIDTH_20_40 2122 * flag changes, for HT and VHT the bandwidth field changes. 2123 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed. 2124 * @IEEE80211_RC_SUPP_RATES_CHANGED: The supported rate set of this peer 2125 * changed (in IBSS mode) due to discovering more information about 2126 * the peer. 2127 * @IEEE80211_RC_NSS_CHANGED: N_SS (number of spatial streams) was changed 2128 * by the peer 2129 */ 2130 enum ieee80211_rate_control_changed { 2131 IEEE80211_RC_BW_CHANGED = BIT(0), 2132 IEEE80211_RC_SMPS_CHANGED = BIT(1), 2133 IEEE80211_RC_SUPP_RATES_CHANGED = BIT(2), 2134 IEEE80211_RC_NSS_CHANGED = BIT(3), 2135 }; 2136 2137 /** 2138 * struct ieee80211_ops - callbacks from mac80211 to the driver 2139 * 2140 * This structure contains various callbacks that the driver may 2141 * handle or, in some cases, must handle, for example to configure 2142 * the hardware to a new channel or to transmit a frame. 2143 * 2144 * @tx: Handler that 802.11 module calls for each transmitted frame. 2145 * skb contains the buffer starting from the IEEE 802.11 header. 2146 * The low-level driver should send the frame out based on 2147 * configuration in the TX control data. This handler should, 2148 * preferably, never fail and stop queues appropriately. 2149 * Must be atomic. 2150 * 2151 * @start: Called before the first netdevice attached to the hardware 2152 * is enabled. This should turn on the hardware and must turn on 2153 * frame reception (for possibly enabled monitor interfaces.) 2154 * Returns negative error codes, these may be seen in userspace, 2155 * or zero. 2156 * When the device is started it should not have a MAC address 2157 * to avoid acknowledging frames before a non-monitor device 2158 * is added. 2159 * Must be implemented and can sleep. 2160 * 2161 * @stop: Called after last netdevice attached to the hardware 2162 * is disabled. This should turn off the hardware (at least 2163 * it must turn off frame reception.) 2164 * May be called right after add_interface if that rejects 2165 * an interface. If you added any work onto the mac80211 workqueue 2166 * you should ensure to cancel it on this callback. 2167 * Must be implemented and can sleep. 2168 * 2169 * @suspend: Suspend the device; mac80211 itself will quiesce before and 2170 * stop transmitting and doing any other configuration, and then 2171 * ask the device to suspend. This is only invoked when WoWLAN is 2172 * configured, otherwise the device is deconfigured completely and 2173 * reconfigured at resume time. 2174 * The driver may also impose special conditions under which it 2175 * wants to use the "normal" suspend (deconfigure), say if it only 2176 * supports WoWLAN when the device is associated. In this case, it 2177 * must return 1 from this function. 2178 * 2179 * @resume: If WoWLAN was configured, this indicates that mac80211 is 2180 * now resuming its operation, after this the device must be fully 2181 * functional again. If this returns an error, the only way out is 2182 * to also unregister the device. If it returns 1, then mac80211 2183 * will also go through the regular complete restart on resume. 2184 * 2185 * @set_wakeup: Enable or disable wakeup when WoWLAN configuration is 2186 * modified. The reason is that device_set_wakeup_enable() is 2187 * supposed to be called when the configuration changes, not only 2188 * in suspend(). 2189 * 2190 * @add_interface: Called when a netdevice attached to the hardware is 2191 * enabled. Because it is not called for monitor mode devices, @start 2192 * and @stop must be implemented. 2193 * The driver should perform any initialization it needs before 2194 * the device can be enabled. The initial configuration for the 2195 * interface is given in the conf parameter. 2196 * The callback may refuse to add an interface by returning a 2197 * negative error code (which will be seen in userspace.) 2198 * Must be implemented and can sleep. 2199 * 2200 * @change_interface: Called when a netdevice changes type. This callback 2201 * is optional, but only if it is supported can interface types be 2202 * switched while the interface is UP. The callback may sleep. 2203 * Note that while an interface is being switched, it will not be 2204 * found by the interface iteration callbacks. 2205 * 2206 * @remove_interface: Notifies a driver that an interface is going down. 2207 * The @stop callback is called after this if it is the last interface 2208 * and no monitor interfaces are present. 2209 * When all interfaces are removed, the MAC address in the hardware 2210 * must be cleared so the device no longer acknowledges packets, 2211 * the mac_addr member of the conf structure is, however, set to the 2212 * MAC address of the device going away. 2213 * Hence, this callback must be implemented. It can sleep. 2214 * 2215 * @add_interface_debugfs: Drivers can use this callback to add debugfs files 2216 * when a vif is added to mac80211. This callback and 2217 * @remove_interface_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2218 * conditional. @remove_interface_debugfs must be provided for cleanup. 2219 * This callback can sleep. 2220 * 2221 * @remove_interface_debugfs: Remove the debugfs files which were added using 2222 * @add_interface_debugfs. This callback must remove all debugfs entries 2223 * that were added because mac80211 only removes interface debugfs when the 2224 * interface is destroyed, not when it is removed from the driver. 2225 * This callback can sleep. 2226 * 2227 * @config: Handler for configuration requests. IEEE 802.11 code calls this 2228 * function to change hardware configuration, e.g., channel. 2229 * This function should never fail but returns a negative error code 2230 * if it does. The callback can sleep. 2231 * 2232 * @bss_info_changed: Handler for configuration requests related to BSS 2233 * parameters that may vary during BSS's lifespan, and may affect low 2234 * level driver (e.g. assoc/disassoc status, erp parameters). 2235 * This function should not be used if no BSS has been set, unless 2236 * for association indication. The @changed parameter indicates which 2237 * of the bss parameters has changed when a call is made. The callback 2238 * can sleep. 2239 * 2240 * @prepare_multicast: Prepare for multicast filter configuration. 2241 * This callback is optional, and its return value is passed 2242 * to configure_filter(). This callback must be atomic. 2243 * 2244 * @configure_filter: Configure the device's RX filter. 2245 * See the section "Frame filtering" for more information. 2246 * This callback must be implemented and can sleep. 2247 * 2248 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 2249 * must be set or cleared for a given STA. Must be atomic. 2250 * 2251 * @set_key: See the section "Hardware crypto acceleration" 2252 * This callback is only called between add_interface and 2253 * remove_interface calls, i.e. while the given virtual interface 2254 * is enabled. 2255 * Returns a negative error code if the key can't be added. 2256 * The callback can sleep. 2257 * 2258 * @update_tkip_key: See the section "Hardware crypto acceleration" 2259 * This callback will be called in the context of Rx. Called for drivers 2260 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 2261 * The callback must be atomic. 2262 * 2263 * @set_rekey_data: If the device supports GTK rekeying, for example while the 2264 * host is suspended, it can assign this callback to retrieve the data 2265 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 2266 * After rekeying was done it should (for example during resume) notify 2267 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 2268 * 2269 * @set_default_unicast_key: Set the default (unicast) key index, useful for 2270 * WEP when the device sends data packets autonomously, e.g. for ARP 2271 * offloading. The index can be 0-3, or -1 for unsetting it. 2272 * 2273 * @hw_scan: Ask the hardware to service the scan request, no need to start 2274 * the scan state machine in stack. The scan must honour the channel 2275 * configuration done by the regulatory agent in the wiphy's 2276 * registered bands. The hardware (or the driver) needs to make sure 2277 * that power save is disabled. 2278 * The @req ie/ie_len members are rewritten by mac80211 to contain the 2279 * entire IEs after the SSID, so that drivers need not look at these 2280 * at all but just send them after the SSID -- mac80211 includes the 2281 * (extended) supported rates and HT information (where applicable). 2282 * When the scan finishes, ieee80211_scan_completed() must be called; 2283 * note that it also must be called when the scan cannot finish due to 2284 * any error unless this callback returned a negative error code. 2285 * The callback can sleep. 2286 * 2287 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 2288 * The driver should ask the hardware to cancel the scan (if possible), 2289 * but the scan will be completed only after the driver will call 2290 * ieee80211_scan_completed(). 2291 * This callback is needed for wowlan, to prevent enqueueing a new 2292 * scan_work after the low-level driver was already suspended. 2293 * The callback can sleep. 2294 * 2295 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 2296 * specific intervals. The driver must call the 2297 * ieee80211_sched_scan_results() function whenever it finds results. 2298 * This process will continue until sched_scan_stop is called. 2299 * 2300 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 2301 * 2302 * @sw_scan_start: Notifier function that is called just before a software scan 2303 * is started. Can be NULL, if the driver doesn't need this notification. 2304 * The callback can sleep. 2305 * 2306 * @sw_scan_complete: Notifier function that is called just after a 2307 * software scan finished. Can be NULL, if the driver doesn't need 2308 * this notification. 2309 * The callback can sleep. 2310 * 2311 * @get_stats: Return low-level statistics. 2312 * Returns zero if statistics are available. 2313 * The callback can sleep. 2314 * 2315 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 2316 * callback should be provided to read the TKIP transmit IVs (both IV32 2317 * and IV16) for the given key from hardware. 2318 * The callback must be atomic. 2319 * 2320 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 2321 * if the device does fragmentation by itself; if this callback is 2322 * implemented then the stack will not do fragmentation. 2323 * The callback can sleep. 2324 * 2325 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 2326 * The callback can sleep. 2327 * 2328 * @sta_add: Notifies low level driver about addition of an associated station, 2329 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2330 * 2331 * @sta_remove: Notifies low level driver about removal of an associated 2332 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 2333 * 2334 * @sta_add_debugfs: Drivers can use this callback to add debugfs files 2335 * when a station is added to mac80211's station list. This callback 2336 * and @sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS 2337 * conditional. This callback can sleep. 2338 * 2339 * @sta_remove_debugfs: Remove the debugfs files which were added using 2340 * @sta_add_debugfs. This callback can sleep. 2341 * 2342 * @sta_notify: Notifies low level driver about power state transition of an 2343 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 2344 * in AP mode, this callback will not be called when the flag 2345 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 2346 * 2347 * @sta_state: Notifies low level driver about state transition of a 2348 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 2349 * This callback is mutually exclusive with @sta_add/@sta_remove. 2350 * It must not fail for down transitions but may fail for transitions 2351 * up the list of states. 2352 * The callback can sleep. 2353 * 2354 * @sta_rc_update: Notifies the driver of changes to the bitrates that can be 2355 * used to transmit to the station. The changes are advertised with bits 2356 * from &enum ieee80211_rate_control_changed and the values are reflected 2357 * in the station data. This callback should only be used when the driver 2358 * uses hardware rate control (%IEEE80211_HW_HAS_RATE_CONTROL) since 2359 * otherwise the rate control algorithm is notified directly. 2360 * Must be atomic. 2361 * 2362 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 2363 * bursting) for a hardware TX queue. 2364 * Returns a negative error code on failure. 2365 * The callback can sleep. 2366 * 2367 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 2368 * this is only used for IBSS mode BSSID merging and debugging. Is not a 2369 * required function. 2370 * The callback can sleep. 2371 * 2372 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 2373 * Currently, this is only used for IBSS mode debugging. Is not a 2374 * required function. 2375 * The callback can sleep. 2376 * 2377 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 2378 * with other STAs in the IBSS. This is only used in IBSS mode. This 2379 * function is optional if the firmware/hardware takes full care of 2380 * TSF synchronization. 2381 * The callback can sleep. 2382 * 2383 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2384 * This is needed only for IBSS mode and the result of this function is 2385 * used to determine whether to reply to Probe Requests. 2386 * Returns non-zero if this device sent the last beacon. 2387 * The callback can sleep. 2388 * 2389 * @ampdu_action: Perform a certain A-MPDU action 2390 * The RA/TID combination determines the destination and TID we want 2391 * the ampdu action to be performed for. The action is defined through 2392 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2393 * is the first frame we expect to perform the action on. Notice 2394 * that TX/RX_STOP can pass NULL for this parameter. 2395 * The @buf_size parameter is only valid when the action is set to 2396 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2397 * buffer size (number of subframes) for this session -- the driver 2398 * may neither send aggregates containing more subframes than this 2399 * nor send aggregates in a way that lost frames would exceed the 2400 * buffer size. If just limiting the aggregate size, this would be 2401 * possible with a buf_size of 8: 2402 * - TX: 1.....7 2403 * - RX: 2....7 (lost frame #1) 2404 * - TX: 8..1... 2405 * which is invalid since #1 was now re-transmitted well past the 2406 * buffer size of 8. Correct ways to retransmit #1 would be: 2407 * - TX: 1 or 18 or 81 2408 * Even "189" would be wrong since 1 could be lost again. 2409 * 2410 * Returns a negative error code on failure. 2411 * The callback can sleep. 2412 * 2413 * @get_survey: Return per-channel survey information 2414 * 2415 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2416 * need to set wiphy->rfkill_poll to %true before registration, 2417 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2418 * The callback can sleep. 2419 * 2420 * @set_coverage_class: Set slot time for given coverage class as specified 2421 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2422 * accordingly. This callback is not required and may sleep. 2423 * 2424 * @testmode_cmd: Implement a cfg80211 test mode command. 2425 * The callback can sleep. 2426 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2427 * 2428 * @flush: Flush all pending frames from the hardware queue, making sure 2429 * that the hardware queues are empty. If the parameter @drop is set 2430 * to %true, pending frames may be dropped. The callback can sleep. 2431 * 2432 * @channel_switch: Drivers that need (or want) to offload the channel 2433 * switch operation for CSAs received from the AP may implement this 2434 * callback. They must then call ieee80211_chswitch_done() to indicate 2435 * completion of the channel switch. 2436 * 2437 * @napi_poll: Poll Rx queue for incoming data frames. 2438 * 2439 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2440 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2441 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2442 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2443 * 2444 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2445 * 2446 * @remain_on_channel: Starts an off-channel period on the given channel, must 2447 * call back to ieee80211_ready_on_channel() when on that channel. Note 2448 * that normal channel traffic is not stopped as this is intended for hw 2449 * offload. Frames to transmit on the off-channel channel are transmitted 2450 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2451 * duration (which will always be non-zero) expires, the driver must call 2452 * ieee80211_remain_on_channel_expired(). 2453 * Note that this callback may be called while the device is in IDLE and 2454 * must be accepted in this case. 2455 * This callback may sleep. 2456 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2457 * aborted before it expires. This callback may sleep. 2458 * 2459 * @set_ringparam: Set tx and rx ring sizes. 2460 * 2461 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2462 * 2463 * @tx_frames_pending: Check if there is any pending frame in the hardware 2464 * queues before entering power save. 2465 * 2466 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2467 * when transmitting a frame. Currently only legacy rates are handled. 2468 * The callback can sleep. 2469 * @rssi_callback: Notify driver when the average RSSI goes above/below 2470 * thresholds that were registered previously. The callback can sleep. 2471 * 2472 * @release_buffered_frames: Release buffered frames according to the given 2473 * parameters. In the case where the driver buffers some frames for 2474 * sleeping stations mac80211 will use this callback to tell the driver 2475 * to release some frames, either for PS-poll or uAPSD. 2476 * Note that if the @more_data paramter is %false the driver must check 2477 * if there are more frames on the given TIDs, and if there are more than 2478 * the frames being released then it must still set the more-data bit in 2479 * the frame. If the @more_data parameter is %true, then of course the 2480 * more-data bit must always be set. 2481 * The @tids parameter tells the driver which TIDs to release frames 2482 * from, for PS-poll it will always have only a single bit set. 2483 * In the case this is used for a PS-poll initiated release, the 2484 * @num_frames parameter will always be 1 so code can be shared. In 2485 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2486 * on the TX status (and must report TX status) so that the PS-poll 2487 * period is properly ended. This is used to avoid sending multiple 2488 * responses for a retried PS-poll frame. 2489 * In the case this is used for uAPSD, the @num_frames parameter may be 2490 * bigger than one, but the driver may send fewer frames (it must send 2491 * at least one, however). In this case it is also responsible for 2492 * setting the EOSP flag in the QoS header of the frames. Also, when the 2493 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2494 * on the last frame in the SP. Alternatively, it may call the function 2495 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2496 * This callback must be atomic. 2497 * @allow_buffered_frames: Prepare device to allow the given number of frames 2498 * to go out to the given station. The frames will be sent by mac80211 2499 * via the usual TX path after this call. The TX information for frames 2500 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2501 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2502 * frames from multiple TIDs are released and the driver might reorder 2503 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2504 * on the last frame and clear it on all others and also handle the EOSP 2505 * bit in the QoS header correctly. Alternatively, it can also call the 2506 * ieee80211_sta_eosp_irqsafe() function. 2507 * The @tids parameter is a bitmap and tells the driver which TIDs the 2508 * frames will be on; it will at most have two bits set. 2509 * This callback must be atomic. 2510 * 2511 * @get_et_sset_count: Ethtool API to get string-set count. 2512 * 2513 * @get_et_stats: Ethtool API to get a set of u64 stats. 2514 * 2515 * @get_et_strings: Ethtool API to get a set of strings to describe stats 2516 * and perhaps other supported types of ethtool data-sets. 2517 * 2518 * @get_rssi: Get current signal strength in dBm, the function is optional 2519 * and can sleep. 2520 * 2521 * @mgd_prepare_tx: Prepare for transmitting a management frame for association 2522 * before associated. In multi-channel scenarios, a virtual interface is 2523 * bound to a channel before it is associated, but as it isn't associated 2524 * yet it need not necessarily be given airtime, in particular since any 2525 * transmission to a P2P GO needs to be synchronized against the GO's 2526 * powersave state. mac80211 will call this function before transmitting a 2527 * management frame prior to having successfully associated to allow the 2528 * driver to give it channel time for the transmission, to get a response 2529 * and to be able to synchronize with the GO. 2530 * The callback will be called before each transmission and upon return 2531 * mac80211 will transmit the frame right away. 2532 * The callback is optional and can (should!) sleep. 2533 * 2534 * @add_chanctx: Notifies device driver about new channel context creation. 2535 * @remove_chanctx: Notifies device driver about channel context destruction. 2536 * @change_chanctx: Notifies device driver about channel context changes that 2537 * may happen when combining different virtual interfaces on the same 2538 * channel context with different settings 2539 * @assign_vif_chanctx: Notifies device driver about channel context being bound 2540 * to vif. Possible use is for hw queue remapping. 2541 * @unassign_vif_chanctx: Notifies device driver about channel context being 2542 * unbound from vif. 2543 * @start_ap: Start operation on the AP interface, this is called after all the 2544 * information in bss_conf is set and beacon can be retrieved. A channel 2545 * context is bound before this is called. Note that if the driver uses 2546 * software scan or ROC, this (and @stop_ap) isn't called when the AP is 2547 * just "paused" for scanning/ROC, which is indicated by the beacon being 2548 * disabled/enabled via @bss_info_changed. 2549 * @stop_ap: Stop operation on the AP interface. 2550 * 2551 * @restart_complete: Called after a call to ieee80211_restart_hw(), when the 2552 * reconfiguration has completed. This can help the driver implement the 2553 * reconfiguration step. Also called when reconfiguring because the 2554 * driver's resume function returned 1, as this is just like an "inline" 2555 * hardware restart. This callback may sleep. 2556 * 2557 * @ipv6_addr_change: IPv6 address assignment on the given interface changed. 2558 * Currently, this is only called for managed or P2P client interfaces. 2559 * This callback is optional; it must not sleep. 2560 */ 2561 struct ieee80211_ops { 2562 void (*tx)(struct ieee80211_hw *hw, 2563 struct ieee80211_tx_control *control, 2564 struct sk_buff *skb); 2565 int (*start)(struct ieee80211_hw *hw); 2566 void (*stop)(struct ieee80211_hw *hw); 2567 #ifdef CONFIG_PM 2568 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2569 int (*resume)(struct ieee80211_hw *hw); 2570 void (*set_wakeup)(struct ieee80211_hw *hw, bool enabled); 2571 #endif 2572 int (*add_interface)(struct ieee80211_hw *hw, 2573 struct ieee80211_vif *vif); 2574 int (*change_interface)(struct ieee80211_hw *hw, 2575 struct ieee80211_vif *vif, 2576 enum nl80211_iftype new_type, bool p2p); 2577 void (*remove_interface)(struct ieee80211_hw *hw, 2578 struct ieee80211_vif *vif); 2579 int (*config)(struct ieee80211_hw *hw, u32 changed); 2580 void (*bss_info_changed)(struct ieee80211_hw *hw, 2581 struct ieee80211_vif *vif, 2582 struct ieee80211_bss_conf *info, 2583 u32 changed); 2584 2585 int (*start_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2586 void (*stop_ap)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2587 2588 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2589 struct netdev_hw_addr_list *mc_list); 2590 void (*configure_filter)(struct ieee80211_hw *hw, 2591 unsigned int changed_flags, 2592 unsigned int *total_flags, 2593 u64 multicast); 2594 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2595 bool set); 2596 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2597 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2598 struct ieee80211_key_conf *key); 2599 void (*update_tkip_key)(struct ieee80211_hw *hw, 2600 struct ieee80211_vif *vif, 2601 struct ieee80211_key_conf *conf, 2602 struct ieee80211_sta *sta, 2603 u32 iv32, u16 *phase1key); 2604 void (*set_rekey_data)(struct ieee80211_hw *hw, 2605 struct ieee80211_vif *vif, 2606 struct cfg80211_gtk_rekey_data *data); 2607 void (*set_default_unicast_key)(struct ieee80211_hw *hw, 2608 struct ieee80211_vif *vif, int idx); 2609 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2610 struct cfg80211_scan_request *req); 2611 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2612 struct ieee80211_vif *vif); 2613 int (*sched_scan_start)(struct ieee80211_hw *hw, 2614 struct ieee80211_vif *vif, 2615 struct cfg80211_sched_scan_request *req, 2616 struct ieee80211_sched_scan_ies *ies); 2617 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2618 struct ieee80211_vif *vif); 2619 void (*sw_scan_start)(struct ieee80211_hw *hw); 2620 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2621 int (*get_stats)(struct ieee80211_hw *hw, 2622 struct ieee80211_low_level_stats *stats); 2623 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2624 u32 *iv32, u16 *iv16); 2625 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2626 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2627 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2628 struct ieee80211_sta *sta); 2629 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2630 struct ieee80211_sta *sta); 2631 #ifdef CONFIG_MAC80211_DEBUGFS 2632 void (*sta_add_debugfs)(struct ieee80211_hw *hw, 2633 struct ieee80211_vif *vif, 2634 struct ieee80211_sta *sta, 2635 struct dentry *dir); 2636 void (*sta_remove_debugfs)(struct ieee80211_hw *hw, 2637 struct ieee80211_vif *vif, 2638 struct ieee80211_sta *sta, 2639 struct dentry *dir); 2640 void (*add_interface_debugfs)(struct ieee80211_hw *hw, 2641 struct ieee80211_vif *vif, 2642 struct dentry *dir); 2643 void (*remove_interface_debugfs)(struct ieee80211_hw *hw, 2644 struct ieee80211_vif *vif, 2645 struct dentry *dir); 2646 #endif 2647 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2648 enum sta_notify_cmd, struct ieee80211_sta *sta); 2649 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2650 struct ieee80211_sta *sta, 2651 enum ieee80211_sta_state old_state, 2652 enum ieee80211_sta_state new_state); 2653 void (*sta_rc_update)(struct ieee80211_hw *hw, 2654 struct ieee80211_vif *vif, 2655 struct ieee80211_sta *sta, 2656 u32 changed); 2657 int (*conf_tx)(struct ieee80211_hw *hw, 2658 struct ieee80211_vif *vif, u16 ac, 2659 const struct ieee80211_tx_queue_params *params); 2660 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2661 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2662 u64 tsf); 2663 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2664 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2665 int (*ampdu_action)(struct ieee80211_hw *hw, 2666 struct ieee80211_vif *vif, 2667 enum ieee80211_ampdu_mlme_action action, 2668 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2669 u8 buf_size); 2670 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2671 struct survey_info *survey); 2672 void (*rfkill_poll)(struct ieee80211_hw *hw); 2673 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2674 #ifdef CONFIG_NL80211_TESTMODE 2675 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2676 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2677 struct netlink_callback *cb, 2678 void *data, int len); 2679 #endif 2680 void (*flush)(struct ieee80211_hw *hw, bool drop); 2681 void (*channel_switch)(struct ieee80211_hw *hw, 2682 struct ieee80211_channel_switch *ch_switch); 2683 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2684 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2685 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2686 2687 int (*remain_on_channel)(struct ieee80211_hw *hw, 2688 struct ieee80211_vif *vif, 2689 struct ieee80211_channel *chan, 2690 int duration); 2691 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2692 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2693 void (*get_ringparam)(struct ieee80211_hw *hw, 2694 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2695 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2696 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2697 const struct cfg80211_bitrate_mask *mask); 2698 void (*rssi_callback)(struct ieee80211_hw *hw, 2699 struct ieee80211_vif *vif, 2700 enum ieee80211_rssi_event rssi_event); 2701 2702 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2703 struct ieee80211_sta *sta, 2704 u16 tids, int num_frames, 2705 enum ieee80211_frame_release_type reason, 2706 bool more_data); 2707 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2708 struct ieee80211_sta *sta, 2709 u16 tids, int num_frames, 2710 enum ieee80211_frame_release_type reason, 2711 bool more_data); 2712 2713 int (*get_et_sset_count)(struct ieee80211_hw *hw, 2714 struct ieee80211_vif *vif, int sset); 2715 void (*get_et_stats)(struct ieee80211_hw *hw, 2716 struct ieee80211_vif *vif, 2717 struct ethtool_stats *stats, u64 *data); 2718 void (*get_et_strings)(struct ieee80211_hw *hw, 2719 struct ieee80211_vif *vif, 2720 u32 sset, u8 *data); 2721 int (*get_rssi)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2722 struct ieee80211_sta *sta, s8 *rssi_dbm); 2723 2724 void (*mgd_prepare_tx)(struct ieee80211_hw *hw, 2725 struct ieee80211_vif *vif); 2726 2727 int (*add_chanctx)(struct ieee80211_hw *hw, 2728 struct ieee80211_chanctx_conf *ctx); 2729 void (*remove_chanctx)(struct ieee80211_hw *hw, 2730 struct ieee80211_chanctx_conf *ctx); 2731 void (*change_chanctx)(struct ieee80211_hw *hw, 2732 struct ieee80211_chanctx_conf *ctx, 2733 u32 changed); 2734 int (*assign_vif_chanctx)(struct ieee80211_hw *hw, 2735 struct ieee80211_vif *vif, 2736 struct ieee80211_chanctx_conf *ctx); 2737 void (*unassign_vif_chanctx)(struct ieee80211_hw *hw, 2738 struct ieee80211_vif *vif, 2739 struct ieee80211_chanctx_conf *ctx); 2740 2741 void (*restart_complete)(struct ieee80211_hw *hw); 2742 2743 #if IS_ENABLED(CONFIG_IPV6) 2744 void (*ipv6_addr_change)(struct ieee80211_hw *hw, 2745 struct ieee80211_vif *vif, 2746 struct inet6_dev *idev); 2747 #endif 2748 }; 2749 2750 /** 2751 * ieee80211_alloc_hw - Allocate a new hardware device 2752 * 2753 * This must be called once for each hardware device. The returned pointer 2754 * must be used to refer to this device when calling other functions. 2755 * mac80211 allocates a private data area for the driver pointed to by 2756 * @priv in &struct ieee80211_hw, the size of this area is given as 2757 * @priv_data_len. 2758 * 2759 * @priv_data_len: length of private data 2760 * @ops: callbacks for this device 2761 * 2762 * Return: A pointer to the new hardware device, or %NULL on error. 2763 */ 2764 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2765 const struct ieee80211_ops *ops); 2766 2767 /** 2768 * ieee80211_register_hw - Register hardware device 2769 * 2770 * You must call this function before any other functions in 2771 * mac80211. Note that before a hardware can be registered, you 2772 * need to fill the contained wiphy's information. 2773 * 2774 * @hw: the device to register as returned by ieee80211_alloc_hw() 2775 * 2776 * Return: 0 on success. An error code otherwise. 2777 */ 2778 int ieee80211_register_hw(struct ieee80211_hw *hw); 2779 2780 /** 2781 * struct ieee80211_tpt_blink - throughput blink description 2782 * @throughput: throughput in Kbit/sec 2783 * @blink_time: blink time in milliseconds 2784 * (full cycle, ie. one off + one on period) 2785 */ 2786 struct ieee80211_tpt_blink { 2787 int throughput; 2788 int blink_time; 2789 }; 2790 2791 /** 2792 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2793 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2794 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2795 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2796 * interface is connected in some way, including being an AP 2797 */ 2798 enum ieee80211_tpt_led_trigger_flags { 2799 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2800 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2801 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2802 }; 2803 2804 #ifdef CONFIG_MAC80211_LEDS 2805 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2806 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2807 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2808 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2809 extern char *__ieee80211_create_tpt_led_trigger( 2810 struct ieee80211_hw *hw, unsigned int flags, 2811 const struct ieee80211_tpt_blink *blink_table, 2812 unsigned int blink_table_len); 2813 #endif 2814 /** 2815 * ieee80211_get_tx_led_name - get name of TX LED 2816 * 2817 * mac80211 creates a transmit LED trigger for each wireless hardware 2818 * that can be used to drive LEDs if your driver registers a LED device. 2819 * This function returns the name (or %NULL if not configured for LEDs) 2820 * of the trigger so you can automatically link the LED device. 2821 * 2822 * @hw: the hardware to get the LED trigger name for 2823 * 2824 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2825 */ 2826 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2827 { 2828 #ifdef CONFIG_MAC80211_LEDS 2829 return __ieee80211_get_tx_led_name(hw); 2830 #else 2831 return NULL; 2832 #endif 2833 } 2834 2835 /** 2836 * ieee80211_get_rx_led_name - get name of RX LED 2837 * 2838 * mac80211 creates a receive LED trigger for each wireless hardware 2839 * that can be used to drive LEDs if your driver registers a LED device. 2840 * This function returns the name (or %NULL if not configured for LEDs) 2841 * of the trigger so you can automatically link the LED device. 2842 * 2843 * @hw: the hardware to get the LED trigger name for 2844 * 2845 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2846 */ 2847 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2848 { 2849 #ifdef CONFIG_MAC80211_LEDS 2850 return __ieee80211_get_rx_led_name(hw); 2851 #else 2852 return NULL; 2853 #endif 2854 } 2855 2856 /** 2857 * ieee80211_get_assoc_led_name - get name of association LED 2858 * 2859 * mac80211 creates a association LED trigger for each wireless hardware 2860 * that can be used to drive LEDs if your driver registers a LED device. 2861 * This function returns the name (or %NULL if not configured for LEDs) 2862 * of the trigger so you can automatically link the LED device. 2863 * 2864 * @hw: the hardware to get the LED trigger name for 2865 * 2866 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2867 */ 2868 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2869 { 2870 #ifdef CONFIG_MAC80211_LEDS 2871 return __ieee80211_get_assoc_led_name(hw); 2872 #else 2873 return NULL; 2874 #endif 2875 } 2876 2877 /** 2878 * ieee80211_get_radio_led_name - get name of radio LED 2879 * 2880 * mac80211 creates a radio change LED trigger for each wireless hardware 2881 * that can be used to drive LEDs if your driver registers a LED device. 2882 * This function returns the name (or %NULL if not configured for LEDs) 2883 * of the trigger so you can automatically link the LED device. 2884 * 2885 * @hw: the hardware to get the LED trigger name for 2886 * 2887 * Return: The name of the LED trigger. %NULL if not configured for LEDs. 2888 */ 2889 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2890 { 2891 #ifdef CONFIG_MAC80211_LEDS 2892 return __ieee80211_get_radio_led_name(hw); 2893 #else 2894 return NULL; 2895 #endif 2896 } 2897 2898 /** 2899 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2900 * @hw: the hardware to create the trigger for 2901 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2902 * @blink_table: the blink table -- needs to be ordered by throughput 2903 * @blink_table_len: size of the blink table 2904 * 2905 * Return: %NULL (in case of error, or if no LED triggers are 2906 * configured) or the name of the new trigger. 2907 * 2908 * Note: This function must be called before ieee80211_register_hw(). 2909 */ 2910 static inline char * 2911 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2912 const struct ieee80211_tpt_blink *blink_table, 2913 unsigned int blink_table_len) 2914 { 2915 #ifdef CONFIG_MAC80211_LEDS 2916 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2917 blink_table_len); 2918 #else 2919 return NULL; 2920 #endif 2921 } 2922 2923 /** 2924 * ieee80211_unregister_hw - Unregister a hardware device 2925 * 2926 * This function instructs mac80211 to free allocated resources 2927 * and unregister netdevices from the networking subsystem. 2928 * 2929 * @hw: the hardware to unregister 2930 */ 2931 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2932 2933 /** 2934 * ieee80211_free_hw - free hardware descriptor 2935 * 2936 * This function frees everything that was allocated, including the 2937 * private data for the driver. You must call ieee80211_unregister_hw() 2938 * before calling this function. 2939 * 2940 * @hw: the hardware to free 2941 */ 2942 void ieee80211_free_hw(struct ieee80211_hw *hw); 2943 2944 /** 2945 * ieee80211_restart_hw - restart hardware completely 2946 * 2947 * Call this function when the hardware was restarted for some reason 2948 * (hardware error, ...) and the driver is unable to restore its state 2949 * by itself. mac80211 assumes that at this point the driver/hardware 2950 * is completely uninitialised and stopped, it starts the process by 2951 * calling the ->start() operation. The driver will need to reset all 2952 * internal state that it has prior to calling this function. 2953 * 2954 * @hw: the hardware to restart 2955 */ 2956 void ieee80211_restart_hw(struct ieee80211_hw *hw); 2957 2958 /** ieee80211_napi_schedule - schedule NAPI poll 2959 * 2960 * Use this function to schedule NAPI polling on a device. 2961 * 2962 * @hw: the hardware to start polling 2963 */ 2964 void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2965 2966 /** ieee80211_napi_complete - complete NAPI polling 2967 * 2968 * Use this function to finish NAPI polling on a device. 2969 * 2970 * @hw: the hardware to stop polling 2971 */ 2972 void ieee80211_napi_complete(struct ieee80211_hw *hw); 2973 2974 /** 2975 * ieee80211_rx - receive frame 2976 * 2977 * Use this function to hand received frames to mac80211. The receive 2978 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2979 * paged @skb is used, the driver is recommended to put the ieee80211 2980 * header of the frame on the linear part of the @skb to avoid memory 2981 * allocation and/or memcpy by the stack. 2982 * 2983 * This function may not be called in IRQ context. Calls to this function 2984 * for a single hardware must be synchronized against each other. Calls to 2985 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2986 * mixed for a single hardware. 2987 * 2988 * In process context use instead ieee80211_rx_ni(). 2989 * 2990 * @hw: the hardware this frame came in on 2991 * @skb: the buffer to receive, owned by mac80211 after this call 2992 */ 2993 void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2994 2995 /** 2996 * ieee80211_rx_irqsafe - receive frame 2997 * 2998 * Like ieee80211_rx() but can be called in IRQ context 2999 * (internally defers to a tasklet.) 3000 * 3001 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 3002 * be mixed for a single hardware. 3003 * 3004 * @hw: the hardware this frame came in on 3005 * @skb: the buffer to receive, owned by mac80211 after this call 3006 */ 3007 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 3008 3009 /** 3010 * ieee80211_rx_ni - receive frame (in process context) 3011 * 3012 * Like ieee80211_rx() but can be called in process context 3013 * (internally disables bottom halves). 3014 * 3015 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 3016 * not be mixed for a single hardware. 3017 * 3018 * @hw: the hardware this frame came in on 3019 * @skb: the buffer to receive, owned by mac80211 after this call 3020 */ 3021 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 3022 struct sk_buff *skb) 3023 { 3024 local_bh_disable(); 3025 ieee80211_rx(hw, skb); 3026 local_bh_enable(); 3027 } 3028 3029 /** 3030 * ieee80211_sta_ps_transition - PS transition for connected sta 3031 * 3032 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 3033 * flag set, use this function to inform mac80211 about a connected station 3034 * entering/leaving PS mode. 3035 * 3036 * This function may not be called in IRQ context or with softirqs enabled. 3037 * 3038 * Calls to this function for a single hardware must be synchronized against 3039 * each other. 3040 * 3041 * @sta: currently connected sta 3042 * @start: start or stop PS 3043 * 3044 * Return: 0 on success. -EINVAL when the requested PS mode is already set. 3045 */ 3046 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 3047 3048 /** 3049 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 3050 * (in process context) 3051 * 3052 * Like ieee80211_sta_ps_transition() but can be called in process context 3053 * (internally disables bottom halves). Concurrent call restriction still 3054 * applies. 3055 * 3056 * @sta: currently connected sta 3057 * @start: start or stop PS 3058 * 3059 * Return: Like ieee80211_sta_ps_transition(). 3060 */ 3061 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 3062 bool start) 3063 { 3064 int ret; 3065 3066 local_bh_disable(); 3067 ret = ieee80211_sta_ps_transition(sta, start); 3068 local_bh_enable(); 3069 3070 return ret; 3071 } 3072 3073 /* 3074 * The TX headroom reserved by mac80211 for its own tx_status functions. 3075 * This is enough for the radiotap header. 3076 */ 3077 #define IEEE80211_TX_STATUS_HEADROOM 14 3078 3079 /** 3080 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 3081 * @sta: &struct ieee80211_sta pointer for the sleeping station 3082 * @tid: the TID that has buffered frames 3083 * @buffered: indicates whether or not frames are buffered for this TID 3084 * 3085 * If a driver buffers frames for a powersave station instead of passing 3086 * them back to mac80211 for retransmission, the station may still need 3087 * to be told that there are buffered frames via the TIM bit. 3088 * 3089 * This function informs mac80211 whether or not there are frames that are 3090 * buffered in the driver for a given TID; mac80211 can then use this data 3091 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 3092 * call! Beware of the locking!) 3093 * 3094 * If all frames are released to the station (due to PS-poll or uAPSD) 3095 * then the driver needs to inform mac80211 that there no longer are 3096 * frames buffered. However, when the station wakes up mac80211 assumes 3097 * that all buffered frames will be transmitted and clears this data, 3098 * drivers need to make sure they inform mac80211 about all buffered 3099 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 3100 * 3101 * Note that technically mac80211 only needs to know this per AC, not per 3102 * TID, but since driver buffering will inevitably happen per TID (since 3103 * it is related to aggregation) it is easier to make mac80211 map the 3104 * TID to the AC as required instead of keeping track in all drivers that 3105 * use this API. 3106 */ 3107 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 3108 u8 tid, bool buffered); 3109 3110 /** 3111 * ieee80211_tx_status - transmit status callback 3112 * 3113 * Call this function for all transmitted frames after they have been 3114 * transmitted. It is permissible to not call this function for 3115 * multicast frames but this can affect statistics. 3116 * 3117 * This function may not be called in IRQ context. Calls to this function 3118 * for a single hardware must be synchronized against each other. Calls 3119 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 3120 * may not be mixed for a single hardware. 3121 * 3122 * @hw: the hardware the frame was transmitted by 3123 * @skb: the frame that was transmitted, owned by mac80211 after this call 3124 */ 3125 void ieee80211_tx_status(struct ieee80211_hw *hw, 3126 struct sk_buff *skb); 3127 3128 /** 3129 * ieee80211_tx_status_ni - transmit status callback (in process context) 3130 * 3131 * Like ieee80211_tx_status() but can be called in process context. 3132 * 3133 * Calls to this function, ieee80211_tx_status() and 3134 * ieee80211_tx_status_irqsafe() may not be mixed 3135 * for a single hardware. 3136 * 3137 * @hw: the hardware the frame was transmitted by 3138 * @skb: the frame that was transmitted, owned by mac80211 after this call 3139 */ 3140 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 3141 struct sk_buff *skb) 3142 { 3143 local_bh_disable(); 3144 ieee80211_tx_status(hw, skb); 3145 local_bh_enable(); 3146 } 3147 3148 /** 3149 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 3150 * 3151 * Like ieee80211_tx_status() but can be called in IRQ context 3152 * (internally defers to a tasklet.) 3153 * 3154 * Calls to this function, ieee80211_tx_status() and 3155 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 3156 * 3157 * @hw: the hardware the frame was transmitted by 3158 * @skb: the frame that was transmitted, owned by mac80211 after this call 3159 */ 3160 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 3161 struct sk_buff *skb); 3162 3163 /** 3164 * ieee80211_report_low_ack - report non-responding station 3165 * 3166 * When operating in AP-mode, call this function to report a non-responding 3167 * connected STA. 3168 * 3169 * @sta: the non-responding connected sta 3170 * @num_packets: number of packets sent to @sta without a response 3171 */ 3172 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 3173 3174 /** 3175 * ieee80211_beacon_get_tim - beacon generation function 3176 * @hw: pointer obtained from ieee80211_alloc_hw(). 3177 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3178 * @tim_offset: pointer to variable that will receive the TIM IE offset. 3179 * Set to 0 if invalid (in non-AP modes). 3180 * @tim_length: pointer to variable that will receive the TIM IE length, 3181 * (including the ID and length bytes!). 3182 * Set to 0 if invalid (in non-AP modes). 3183 * 3184 * If the driver implements beaconing modes, it must use this function to 3185 * obtain the beacon frame/template. 3186 * 3187 * If the beacon frames are generated by the host system (i.e., not in 3188 * hardware/firmware), the driver uses this function to get each beacon 3189 * frame from mac80211 -- it is responsible for calling this function 3190 * before the beacon is needed (e.g. based on hardware interrupt). 3191 * 3192 * If the beacon frames are generated by the device, then the driver 3193 * must use the returned beacon as the template and change the TIM IE 3194 * according to the current DTIM parameters/TIM bitmap. 3195 * 3196 * The driver is responsible for freeing the returned skb. 3197 * 3198 * Return: The beacon template. %NULL on error. 3199 */ 3200 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 3201 struct ieee80211_vif *vif, 3202 u16 *tim_offset, u16 *tim_length); 3203 3204 /** 3205 * ieee80211_beacon_get - beacon generation function 3206 * @hw: pointer obtained from ieee80211_alloc_hw(). 3207 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3208 * 3209 * See ieee80211_beacon_get_tim(). 3210 * 3211 * Return: See ieee80211_beacon_get_tim(). 3212 */ 3213 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 3214 struct ieee80211_vif *vif) 3215 { 3216 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 3217 } 3218 3219 /** 3220 * ieee80211_proberesp_get - retrieve a Probe Response template 3221 * @hw: pointer obtained from ieee80211_alloc_hw(). 3222 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3223 * 3224 * Creates a Probe Response template which can, for example, be uploaded to 3225 * hardware. The destination address should be set by the caller. 3226 * 3227 * Can only be called in AP mode. 3228 * 3229 * Return: The Probe Response template. %NULL on error. 3230 */ 3231 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 3232 struct ieee80211_vif *vif); 3233 3234 /** 3235 * ieee80211_pspoll_get - retrieve a PS Poll template 3236 * @hw: pointer obtained from ieee80211_alloc_hw(). 3237 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3238 * 3239 * Creates a PS Poll a template which can, for example, uploaded to 3240 * hardware. The template must be updated after association so that correct 3241 * AID, BSSID and MAC address is used. 3242 * 3243 * Note: Caller (or hardware) is responsible for setting the 3244 * &IEEE80211_FCTL_PM bit. 3245 * 3246 * Return: The PS Poll template. %NULL on error. 3247 */ 3248 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 3249 struct ieee80211_vif *vif); 3250 3251 /** 3252 * ieee80211_nullfunc_get - retrieve a nullfunc template 3253 * @hw: pointer obtained from ieee80211_alloc_hw(). 3254 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3255 * 3256 * Creates a Nullfunc template which can, for example, uploaded to 3257 * hardware. The template must be updated after association so that correct 3258 * BSSID and address is used. 3259 * 3260 * Note: Caller (or hardware) is responsible for setting the 3261 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 3262 * 3263 * Return: The nullfunc template. %NULL on error. 3264 */ 3265 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 3266 struct ieee80211_vif *vif); 3267 3268 /** 3269 * ieee80211_probereq_get - retrieve a Probe Request template 3270 * @hw: pointer obtained from ieee80211_alloc_hw(). 3271 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3272 * @ssid: SSID buffer 3273 * @ssid_len: length of SSID 3274 * @tailroom: tailroom to reserve at end of SKB for IEs 3275 * 3276 * Creates a Probe Request template which can, for example, be uploaded to 3277 * hardware. 3278 * 3279 * Return: The Probe Request template. %NULL on error. 3280 */ 3281 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 3282 struct ieee80211_vif *vif, 3283 const u8 *ssid, size_t ssid_len, 3284 size_t tailroom); 3285 3286 /** 3287 * ieee80211_rts_get - RTS frame generation function 3288 * @hw: pointer obtained from ieee80211_alloc_hw(). 3289 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3290 * @frame: pointer to the frame that is going to be protected by the RTS. 3291 * @frame_len: the frame length (in octets). 3292 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3293 * @rts: The buffer where to store the RTS frame. 3294 * 3295 * If the RTS frames are generated by the host system (i.e., not in 3296 * hardware/firmware), the low-level driver uses this function to receive 3297 * the next RTS frame from the 802.11 code. The low-level is responsible 3298 * for calling this function before and RTS frame is needed. 3299 */ 3300 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 3301 const void *frame, size_t frame_len, 3302 const struct ieee80211_tx_info *frame_txctl, 3303 struct ieee80211_rts *rts); 3304 3305 /** 3306 * ieee80211_rts_duration - Get the duration field for an RTS frame 3307 * @hw: pointer obtained from ieee80211_alloc_hw(). 3308 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3309 * @frame_len: the length of the frame that is going to be protected by the RTS. 3310 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3311 * 3312 * If the RTS is generated in firmware, but the host system must provide 3313 * the duration field, the low-level driver uses this function to receive 3314 * the duration field value in little-endian byteorder. 3315 * 3316 * Return: The duration. 3317 */ 3318 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 3319 struct ieee80211_vif *vif, size_t frame_len, 3320 const struct ieee80211_tx_info *frame_txctl); 3321 3322 /** 3323 * ieee80211_ctstoself_get - CTS-to-self frame generation function 3324 * @hw: pointer obtained from ieee80211_alloc_hw(). 3325 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3326 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 3327 * @frame_len: the frame length (in octets). 3328 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3329 * @cts: The buffer where to store the CTS-to-self frame. 3330 * 3331 * If the CTS-to-self frames are generated by the host system (i.e., not in 3332 * hardware/firmware), the low-level driver uses this function to receive 3333 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 3334 * for calling this function before and CTS-to-self frame is needed. 3335 */ 3336 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 3337 struct ieee80211_vif *vif, 3338 const void *frame, size_t frame_len, 3339 const struct ieee80211_tx_info *frame_txctl, 3340 struct ieee80211_cts *cts); 3341 3342 /** 3343 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 3344 * @hw: pointer obtained from ieee80211_alloc_hw(). 3345 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3346 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 3347 * @frame_txctl: &struct ieee80211_tx_info of the frame. 3348 * 3349 * If the CTS-to-self is generated in firmware, but the host system must provide 3350 * the duration field, the low-level driver uses this function to receive 3351 * the duration field value in little-endian byteorder. 3352 * 3353 * Return: The duration. 3354 */ 3355 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 3356 struct ieee80211_vif *vif, 3357 size_t frame_len, 3358 const struct ieee80211_tx_info *frame_txctl); 3359 3360 /** 3361 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 3362 * @hw: pointer obtained from ieee80211_alloc_hw(). 3363 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3364 * @band: the band to calculate the frame duration on 3365 * @frame_len: the length of the frame. 3366 * @rate: the rate at which the frame is going to be transmitted. 3367 * 3368 * Calculate the duration field of some generic frame, given its 3369 * length and transmission rate (in 100kbps). 3370 * 3371 * Return: The duration. 3372 */ 3373 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 3374 struct ieee80211_vif *vif, 3375 enum ieee80211_band band, 3376 size_t frame_len, 3377 struct ieee80211_rate *rate); 3378 3379 /** 3380 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 3381 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3382 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3383 * 3384 * Function for accessing buffered broadcast and multicast frames. If 3385 * hardware/firmware does not implement buffering of broadcast/multicast 3386 * frames when power saving is used, 802.11 code buffers them in the host 3387 * memory. The low-level driver uses this function to fetch next buffered 3388 * frame. In most cases, this is used when generating beacon frame. 3389 * 3390 * Return: A pointer to the next buffered skb or NULL if no more buffered 3391 * frames are available. 3392 * 3393 * Note: buffered frames are returned only after DTIM beacon frame was 3394 * generated with ieee80211_beacon_get() and the low-level driver must thus 3395 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 3396 * NULL if the previous generated beacon was not DTIM, so the low-level driver 3397 * does not need to check for DTIM beacons separately and should be able to 3398 * use common code for all beacons. 3399 */ 3400 struct sk_buff * 3401 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 3402 3403 /** 3404 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 3405 * 3406 * This function returns the TKIP phase 1 key for the given IV32. 3407 * 3408 * @keyconf: the parameter passed with the set key 3409 * @iv32: IV32 to get the P1K for 3410 * @p1k: a buffer to which the key will be written, as 5 u16 values 3411 */ 3412 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 3413 u32 iv32, u16 *p1k); 3414 3415 /** 3416 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 3417 * 3418 * This function returns the TKIP phase 1 key for the IV32 taken 3419 * from the given packet. 3420 * 3421 * @keyconf: the parameter passed with the set key 3422 * @skb: the packet to take the IV32 value from that will be encrypted 3423 * with this P1K 3424 * @p1k: a buffer to which the key will be written, as 5 u16 values 3425 */ 3426 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 3427 struct sk_buff *skb, u16 *p1k) 3428 { 3429 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 3430 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 3431 u32 iv32 = get_unaligned_le32(&data[4]); 3432 3433 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 3434 } 3435 3436 /** 3437 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 3438 * 3439 * This function returns the TKIP phase 1 key for the given IV32 3440 * and transmitter address. 3441 * 3442 * @keyconf: the parameter passed with the set key 3443 * @ta: TA that will be used with the key 3444 * @iv32: IV32 to get the P1K for 3445 * @p1k: a buffer to which the key will be written, as 5 u16 values 3446 */ 3447 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 3448 const u8 *ta, u32 iv32, u16 *p1k); 3449 3450 /** 3451 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 3452 * 3453 * This function computes the TKIP RC4 key for the IV values 3454 * in the packet. 3455 * 3456 * @keyconf: the parameter passed with the set key 3457 * @skb: the packet to take the IV32/IV16 values from that will be 3458 * encrypted with this key 3459 * @p2k: a buffer to which the key will be written, 16 bytes 3460 */ 3461 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 3462 struct sk_buff *skb, u8 *p2k); 3463 3464 /** 3465 * ieee80211_aes_cmac_calculate_k1_k2 - calculate the AES-CMAC sub keys 3466 * 3467 * This function computes the two AES-CMAC sub-keys, based on the 3468 * previously installed master key. 3469 * 3470 * @keyconf: the parameter passed with the set key 3471 * @k1: a buffer to be filled with the 1st sub-key 3472 * @k2: a buffer to be filled with the 2nd sub-key 3473 */ 3474 void ieee80211_aes_cmac_calculate_k1_k2(struct ieee80211_key_conf *keyconf, 3475 u8 *k1, u8 *k2); 3476 3477 /** 3478 * struct ieee80211_key_seq - key sequence counter 3479 * 3480 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 3481 * @ccmp: PN data, most significant byte first (big endian, 3482 * reverse order than in packet) 3483 * @aes_cmac: PN data, most significant byte first (big endian, 3484 * reverse order than in packet) 3485 */ 3486 struct ieee80211_key_seq { 3487 union { 3488 struct { 3489 u32 iv32; 3490 u16 iv16; 3491 } tkip; 3492 struct { 3493 u8 pn[6]; 3494 } ccmp; 3495 struct { 3496 u8 pn[6]; 3497 } aes_cmac; 3498 }; 3499 }; 3500 3501 /** 3502 * ieee80211_get_key_tx_seq - get key TX sequence counter 3503 * 3504 * @keyconf: the parameter passed with the set key 3505 * @seq: buffer to receive the sequence data 3506 * 3507 * This function allows a driver to retrieve the current TX IV/PN 3508 * for the given key. It must not be called if IV generation is 3509 * offloaded to the device. 3510 * 3511 * Note that this function may only be called when no TX processing 3512 * can be done concurrently, for example when queues are stopped 3513 * and the stop has been synchronized. 3514 */ 3515 void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 3516 struct ieee80211_key_seq *seq); 3517 3518 /** 3519 * ieee80211_get_key_rx_seq - get key RX sequence counter 3520 * 3521 * @keyconf: the parameter passed with the set key 3522 * @tid: The TID, or -1 for the management frame value (CCMP only); 3523 * the value on TID 0 is also used for non-QoS frames. For 3524 * CMAC, only TID 0 is valid. 3525 * @seq: buffer to receive the sequence data 3526 * 3527 * This function allows a driver to retrieve the current RX IV/PNs 3528 * for the given key. It must not be called if IV checking is done 3529 * by the device and not by mac80211. 3530 * 3531 * Note that this function may only be called when no RX processing 3532 * can be done concurrently. 3533 */ 3534 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 3535 int tid, struct ieee80211_key_seq *seq); 3536 3537 /** 3538 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 3539 * @vif: virtual interface the rekeying was done on 3540 * @bssid: The BSSID of the AP, for checking association 3541 * @replay_ctr: the new replay counter after GTK rekeying 3542 * @gfp: allocation flags 3543 */ 3544 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3545 const u8 *replay_ctr, gfp_t gfp); 3546 3547 /** 3548 * ieee80211_wake_queue - wake specific queue 3549 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3550 * @queue: queue number (counted from zero). 3551 * 3552 * Drivers should use this function instead of netif_wake_queue. 3553 */ 3554 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3555 3556 /** 3557 * ieee80211_stop_queue - stop specific queue 3558 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3559 * @queue: queue number (counted from zero). 3560 * 3561 * Drivers should use this function instead of netif_stop_queue. 3562 */ 3563 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3564 3565 /** 3566 * ieee80211_queue_stopped - test status of the queue 3567 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3568 * @queue: queue number (counted from zero). 3569 * 3570 * Drivers should use this function instead of netif_stop_queue. 3571 * 3572 * Return: %true if the queue is stopped. %false otherwise. 3573 */ 3574 3575 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3576 3577 /** 3578 * ieee80211_stop_queues - stop all queues 3579 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3580 * 3581 * Drivers should use this function instead of netif_stop_queue. 3582 */ 3583 void ieee80211_stop_queues(struct ieee80211_hw *hw); 3584 3585 /** 3586 * ieee80211_wake_queues - wake all queues 3587 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3588 * 3589 * Drivers should use this function instead of netif_wake_queue. 3590 */ 3591 void ieee80211_wake_queues(struct ieee80211_hw *hw); 3592 3593 /** 3594 * ieee80211_scan_completed - completed hardware scan 3595 * 3596 * When hardware scan offload is used (i.e. the hw_scan() callback is 3597 * assigned) this function needs to be called by the driver to notify 3598 * mac80211 that the scan finished. This function can be called from 3599 * any context, including hardirq context. 3600 * 3601 * @hw: the hardware that finished the scan 3602 * @aborted: set to true if scan was aborted 3603 */ 3604 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3605 3606 /** 3607 * ieee80211_sched_scan_results - got results from scheduled scan 3608 * 3609 * When a scheduled scan is running, this function needs to be called by the 3610 * driver whenever there are new scan results available. 3611 * 3612 * @hw: the hardware that is performing scheduled scans 3613 */ 3614 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3615 3616 /** 3617 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3618 * 3619 * When a scheduled scan is running, this function can be called by 3620 * the driver if it needs to stop the scan to perform another task. 3621 * Usual scenarios are drivers that cannot continue the scheduled scan 3622 * while associating, for instance. 3623 * 3624 * @hw: the hardware that is performing scheduled scans 3625 */ 3626 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3627 3628 /** 3629 * enum ieee80211_interface_iteration_flags - interface iteration flags 3630 * @IEEE80211_IFACE_ITER_NORMAL: Iterate over all interfaces that have 3631 * been added to the driver; However, note that during hardware 3632 * reconfiguration (after restart_hw) it will iterate over a new 3633 * interface and over all the existing interfaces even if they 3634 * haven't been re-added to the driver yet. 3635 * @IEEE80211_IFACE_ITER_RESUME_ALL: During resume, iterate over all 3636 * interfaces, even if they haven't been re-added to the driver yet. 3637 */ 3638 enum ieee80211_interface_iteration_flags { 3639 IEEE80211_IFACE_ITER_NORMAL = 0, 3640 IEEE80211_IFACE_ITER_RESUME_ALL = BIT(0), 3641 }; 3642 3643 /** 3644 * ieee80211_iterate_active_interfaces - iterate active interfaces 3645 * 3646 * This function iterates over the interfaces associated with a given 3647 * hardware that are currently active and calls the callback for them. 3648 * This function allows the iterator function to sleep, when the iterator 3649 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3650 * be used. 3651 * Does not iterate over a new interface during add_interface(). 3652 * 3653 * @hw: the hardware struct of which the interfaces should be iterated over 3654 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3655 * @iterator: the iterator function to call 3656 * @data: first argument of the iterator function 3657 */ 3658 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3659 u32 iter_flags, 3660 void (*iterator)(void *data, u8 *mac, 3661 struct ieee80211_vif *vif), 3662 void *data); 3663 3664 /** 3665 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3666 * 3667 * This function iterates over the interfaces associated with a given 3668 * hardware that are currently active and calls the callback for them. 3669 * This function requires the iterator callback function to be atomic, 3670 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3671 * Does not iterate over a new interface during add_interface(). 3672 * 3673 * @hw: the hardware struct of which the interfaces should be iterated over 3674 * @iter_flags: iteration flags, see &enum ieee80211_interface_iteration_flags 3675 * @iterator: the iterator function to call, cannot sleep 3676 * @data: first argument of the iterator function 3677 */ 3678 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3679 u32 iter_flags, 3680 void (*iterator)(void *data, 3681 u8 *mac, 3682 struct ieee80211_vif *vif), 3683 void *data); 3684 3685 /** 3686 * ieee80211_queue_work - add work onto the mac80211 workqueue 3687 * 3688 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3689 * This helper ensures drivers are not queueing work when they should not be. 3690 * 3691 * @hw: the hardware struct for the interface we are adding work for 3692 * @work: the work we want to add onto the mac80211 workqueue 3693 */ 3694 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3695 3696 /** 3697 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3698 * 3699 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3700 * workqueue. 3701 * 3702 * @hw: the hardware struct for the interface we are adding work for 3703 * @dwork: delayable work to queue onto the mac80211 workqueue 3704 * @delay: number of jiffies to wait before queueing 3705 */ 3706 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3707 struct delayed_work *dwork, 3708 unsigned long delay); 3709 3710 /** 3711 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3712 * @sta: the station for which to start a BA session 3713 * @tid: the TID to BA on. 3714 * @timeout: session timeout value (in TUs) 3715 * 3716 * Return: success if addBA request was sent, failure otherwise 3717 * 3718 * Although mac80211/low level driver/user space application can estimate 3719 * the need to start aggregation on a certain RA/TID, the session level 3720 * will be managed by the mac80211. 3721 */ 3722 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3723 u16 timeout); 3724 3725 /** 3726 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3727 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3728 * @ra: receiver address of the BA session recipient. 3729 * @tid: the TID to BA on. 3730 * 3731 * This function must be called by low level driver once it has 3732 * finished with preparations for the BA session. It can be called 3733 * from any context. 3734 */ 3735 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3736 u16 tid); 3737 3738 /** 3739 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3740 * @sta: the station whose BA session to stop 3741 * @tid: the TID to stop BA. 3742 * 3743 * Return: negative error if the TID is invalid, or no aggregation active 3744 * 3745 * Although mac80211/low level driver/user space application can estimate 3746 * the need to stop aggregation on a certain RA/TID, the session level 3747 * will be managed by the mac80211. 3748 */ 3749 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3750 3751 /** 3752 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3753 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3754 * @ra: receiver address of the BA session recipient. 3755 * @tid: the desired TID to BA on. 3756 * 3757 * This function must be called by low level driver once it has 3758 * finished with preparations for the BA session tear down. It 3759 * can be called from any context. 3760 */ 3761 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3762 u16 tid); 3763 3764 /** 3765 * ieee80211_find_sta - find a station 3766 * 3767 * @vif: virtual interface to look for station on 3768 * @addr: station's address 3769 * 3770 * Return: The station, if found. %NULL otherwise. 3771 * 3772 * Note: This function must be called under RCU lock and the 3773 * resulting pointer is only valid under RCU lock as well. 3774 */ 3775 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3776 const u8 *addr); 3777 3778 /** 3779 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3780 * 3781 * @hw: pointer as obtained from ieee80211_alloc_hw() 3782 * @addr: remote station's address 3783 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3784 * 3785 * Return: The station, if found. %NULL otherwise. 3786 * 3787 * Note: This function must be called under RCU lock and the 3788 * resulting pointer is only valid under RCU lock as well. 3789 * 3790 * NOTE: You may pass NULL for localaddr, but then you will just get 3791 * the first STA that matches the remote address 'addr'. 3792 * We can have multiple STA associated with multiple 3793 * logical stations (e.g. consider a station connecting to another 3794 * BSSID on the same AP hardware without disconnecting first). 3795 * In this case, the result of this method with localaddr NULL 3796 * is not reliable. 3797 * 3798 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3799 */ 3800 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3801 const u8 *addr, 3802 const u8 *localaddr); 3803 3804 /** 3805 * ieee80211_sta_block_awake - block station from waking up 3806 * @hw: the hardware 3807 * @pubsta: the station 3808 * @block: whether to block or unblock 3809 * 3810 * Some devices require that all frames that are on the queues 3811 * for a specific station that went to sleep are flushed before 3812 * a poll response or frames after the station woke up can be 3813 * delivered to that it. Note that such frames must be rejected 3814 * by the driver as filtered, with the appropriate status flag. 3815 * 3816 * This function allows implementing this mode in a race-free 3817 * manner. 3818 * 3819 * To do this, a driver must keep track of the number of frames 3820 * still enqueued for a specific station. If this number is not 3821 * zero when the station goes to sleep, the driver must call 3822 * this function to force mac80211 to consider the station to 3823 * be asleep regardless of the station's actual state. Once the 3824 * number of outstanding frames reaches zero, the driver must 3825 * call this function again to unblock the station. That will 3826 * cause mac80211 to be able to send ps-poll responses, and if 3827 * the station queried in the meantime then frames will also 3828 * be sent out as a result of this. Additionally, the driver 3829 * will be notified that the station woke up some time after 3830 * it is unblocked, regardless of whether the station actually 3831 * woke up while blocked or not. 3832 */ 3833 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3834 struct ieee80211_sta *pubsta, bool block); 3835 3836 /** 3837 * ieee80211_sta_eosp - notify mac80211 about end of SP 3838 * @pubsta: the station 3839 * 3840 * When a device transmits frames in a way that it can't tell 3841 * mac80211 in the TX status about the EOSP, it must clear the 3842 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3843 * This applies for PS-Poll as well as uAPSD. 3844 * 3845 * Note that there is no non-_irqsafe version right now as 3846 * it wasn't needed, but just like _tx_status() and _rx() 3847 * must not be mixed in irqsafe/non-irqsafe versions, this 3848 * function must not be mixed with those either. Use the 3849 * all irqsafe, or all non-irqsafe, don't mix! If you need 3850 * the non-irqsafe version of this, you need to add it. 3851 */ 3852 void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3853 3854 /** 3855 * ieee80211_iter_keys - iterate keys programmed into the device 3856 * @hw: pointer obtained from ieee80211_alloc_hw() 3857 * @vif: virtual interface to iterate, may be %NULL for all 3858 * @iter: iterator function that will be called for each key 3859 * @iter_data: custom data to pass to the iterator function 3860 * 3861 * This function can be used to iterate all the keys known to 3862 * mac80211, even those that weren't previously programmed into 3863 * the device. This is intended for use in WoWLAN if the device 3864 * needs reprogramming of the keys during suspend. Note that due 3865 * to locking reasons, it is also only safe to call this at few 3866 * spots since it must hold the RTNL and be able to sleep. 3867 * 3868 * The order in which the keys are iterated matches the order 3869 * in which they were originally installed and handed to the 3870 * set_key callback. 3871 */ 3872 void ieee80211_iter_keys(struct ieee80211_hw *hw, 3873 struct ieee80211_vif *vif, 3874 void (*iter)(struct ieee80211_hw *hw, 3875 struct ieee80211_vif *vif, 3876 struct ieee80211_sta *sta, 3877 struct ieee80211_key_conf *key, 3878 void *data), 3879 void *iter_data); 3880 3881 /** 3882 * ieee80211_iter_chan_contexts_atomic - iterate channel contexts 3883 * @hw: pointre obtained from ieee80211_alloc_hw(). 3884 * @iter: iterator function 3885 * @iter_data: data passed to iterator function 3886 * 3887 * Iterate all active channel contexts. This function is atomic and 3888 * doesn't acquire any locks internally that might be held in other 3889 * places while calling into the driver. 3890 * 3891 * The iterator will not find a context that's being added (during 3892 * the driver callback to add it) but will find it while it's being 3893 * removed. 3894 * 3895 * Note that during hardware restart, all contexts that existed 3896 * before the restart are considered already present so will be 3897 * found while iterating, whether they've been re-added already 3898 * or not. 3899 */ 3900 void ieee80211_iter_chan_contexts_atomic( 3901 struct ieee80211_hw *hw, 3902 void (*iter)(struct ieee80211_hw *hw, 3903 struct ieee80211_chanctx_conf *chanctx_conf, 3904 void *data), 3905 void *iter_data); 3906 3907 /** 3908 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3909 * @hw: pointer obtained from ieee80211_alloc_hw(). 3910 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3911 * 3912 * Creates a Probe Request template which can, for example, be uploaded to 3913 * hardware. The template is filled with bssid, ssid and supported rate 3914 * information. This function must only be called from within the 3915 * .bss_info_changed callback function and only in managed mode. The function 3916 * is only useful when the interface is associated, otherwise it will return 3917 * %NULL. 3918 * 3919 * Return: The Probe Request template. %NULL on error. 3920 */ 3921 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3922 struct ieee80211_vif *vif); 3923 3924 /** 3925 * ieee80211_beacon_loss - inform hardware does not receive beacons 3926 * 3927 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3928 * 3929 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3930 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3931 * hardware is not receiving beacons with this function. 3932 */ 3933 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3934 3935 /** 3936 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3937 * 3938 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3939 * 3940 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3941 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3942 * needs to inform if the connection to the AP has been lost. 3943 * The function may also be called if the connection needs to be terminated 3944 * for some other reason, even if %IEEE80211_HW_CONNECTION_MONITOR isn't set. 3945 * 3946 * This function will cause immediate change to disassociated state, 3947 * without connection recovery attempts. 3948 */ 3949 void ieee80211_connection_loss(struct ieee80211_vif *vif); 3950 3951 /** 3952 * ieee80211_resume_disconnect - disconnect from AP after resume 3953 * 3954 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3955 * 3956 * Instructs mac80211 to disconnect from the AP after resume. 3957 * Drivers can use this after WoWLAN if they know that the 3958 * connection cannot be kept up, for example because keys were 3959 * used while the device was asleep but the replay counters or 3960 * similar cannot be retrieved from the device during resume. 3961 * 3962 * Note that due to implementation issues, if the driver uses 3963 * the reconfiguration functionality during resume the interface 3964 * will still be added as associated first during resume and then 3965 * disconnect normally later. 3966 * 3967 * This function can only be called from the resume callback and 3968 * the driver must not be holding any of its own locks while it 3969 * calls this function, or at least not any locks it needs in the 3970 * key configuration paths (if it supports HW crypto). 3971 */ 3972 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3973 3974 /** 3975 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3976 * rssi threshold triggered 3977 * 3978 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3979 * @rssi_event: the RSSI trigger event type 3980 * @gfp: context flags 3981 * 3982 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3983 * monitoring is configured with an rssi threshold, the driver will inform 3984 * whenever the rssi level reaches the threshold. 3985 */ 3986 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3987 enum nl80211_cqm_rssi_threshold_event rssi_event, 3988 gfp_t gfp); 3989 3990 /** 3991 * ieee80211_radar_detected - inform that a radar was detected 3992 * 3993 * @hw: pointer as obtained from ieee80211_alloc_hw() 3994 */ 3995 void ieee80211_radar_detected(struct ieee80211_hw *hw); 3996 3997 /** 3998 * ieee80211_chswitch_done - Complete channel switch process 3999 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4000 * @success: make the channel switch successful or not 4001 * 4002 * Complete the channel switch post-process: set the new operational channel 4003 * and wake up the suspended queues. 4004 */ 4005 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 4006 4007 /** 4008 * ieee80211_request_smps - request SM PS transition 4009 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4010 * @smps_mode: new SM PS mode 4011 * 4012 * This allows the driver to request an SM PS transition in managed 4013 * mode. This is useful when the driver has more information than 4014 * the stack about possible interference, for example by bluetooth. 4015 */ 4016 void ieee80211_request_smps(struct ieee80211_vif *vif, 4017 enum ieee80211_smps_mode smps_mode); 4018 4019 /** 4020 * ieee80211_ready_on_channel - notification of remain-on-channel start 4021 * @hw: pointer as obtained from ieee80211_alloc_hw() 4022 */ 4023 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 4024 4025 /** 4026 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 4027 * @hw: pointer as obtained from ieee80211_alloc_hw() 4028 */ 4029 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 4030 4031 /** 4032 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 4033 * 4034 * in order not to harm the system performance and user experience, the device 4035 * may request not to allow any rx ba session and tear down existing rx ba 4036 * sessions based on system constraints such as periodic BT activity that needs 4037 * to limit wlan activity (eg.sco or a2dp)." 4038 * in such cases, the intention is to limit the duration of the rx ppdu and 4039 * therefore prevent the peer device to use a-mpdu aggregation. 4040 * 4041 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4042 * @ba_rx_bitmap: Bit map of open rx ba per tid 4043 * @addr: & to bssid mac address 4044 */ 4045 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 4046 const u8 *addr); 4047 4048 /** 4049 * ieee80211_send_bar - send a BlockAckReq frame 4050 * 4051 * can be used to flush pending frames from the peer's aggregation reorder 4052 * buffer. 4053 * 4054 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 4055 * @ra: the peer's destination address 4056 * @tid: the TID of the aggregation session 4057 * @ssn: the new starting sequence number for the receiver 4058 */ 4059 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 4060 4061 /* Rate control API */ 4062 4063 /** 4064 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 4065 * 4066 * @hw: The hardware the algorithm is invoked for. 4067 * @sband: The band this frame is being transmitted on. 4068 * @bss_conf: the current BSS configuration 4069 * @skb: the skb that will be transmitted, the control information in it needs 4070 * to be filled in 4071 * @reported_rate: The rate control algorithm can fill this in to indicate 4072 * which rate should be reported to userspace as the current rate and 4073 * used for rate calculations in the mesh network. 4074 * @rts: whether RTS will be used for this frame because it is longer than the 4075 * RTS threshold 4076 * @short_preamble: whether mac80211 will request short-preamble transmission 4077 * if the selected rate supports it 4078 * @max_rate_idx: user-requested maximum (legacy) rate 4079 * (deprecated; this will be removed once drivers get updated to use 4080 * rate_idx_mask) 4081 * @rate_idx_mask: user-requested (legacy) rate mask 4082 * @rate_idx_mcs_mask: user-requested MCS rate mask 4083 * @bss: whether this frame is sent out in AP or IBSS mode 4084 */ 4085 struct ieee80211_tx_rate_control { 4086 struct ieee80211_hw *hw; 4087 struct ieee80211_supported_band *sband; 4088 struct ieee80211_bss_conf *bss_conf; 4089 struct sk_buff *skb; 4090 struct ieee80211_tx_rate reported_rate; 4091 bool rts, short_preamble; 4092 u8 max_rate_idx; 4093 u32 rate_idx_mask; 4094 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 4095 bool bss; 4096 }; 4097 4098 struct rate_control_ops { 4099 struct module *module; 4100 const char *name; 4101 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 4102 void (*free)(void *priv); 4103 4104 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 4105 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 4106 struct ieee80211_sta *sta, void *priv_sta); 4107 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 4108 struct ieee80211_sta *sta, void *priv_sta, 4109 u32 changed); 4110 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 4111 void *priv_sta); 4112 4113 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 4114 struct ieee80211_sta *sta, void *priv_sta, 4115 struct sk_buff *skb); 4116 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 4117 struct ieee80211_tx_rate_control *txrc); 4118 4119 void (*add_sta_debugfs)(void *priv, void *priv_sta, 4120 struct dentry *dir); 4121 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 4122 }; 4123 4124 static inline int rate_supported(struct ieee80211_sta *sta, 4125 enum ieee80211_band band, 4126 int index) 4127 { 4128 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 4129 } 4130 4131 /** 4132 * rate_control_send_low - helper for drivers for management/no-ack frames 4133 * 4134 * Rate control algorithms that agree to use the lowest rate to 4135 * send management frames and NO_ACK data with the respective hw 4136 * retries should use this in the beginning of their mac80211 get_rate 4137 * callback. If true is returned the rate control can simply return. 4138 * If false is returned we guarantee that sta and sta and priv_sta is 4139 * not null. 4140 * 4141 * Rate control algorithms wishing to do more intelligent selection of 4142 * rate for multicast/broadcast frames may choose to not use this. 4143 * 4144 * @sta: &struct ieee80211_sta pointer to the target destination. Note 4145 * that this may be null. 4146 * @priv_sta: private rate control structure. This may be null. 4147 * @txrc: rate control information we sholud populate for mac80211. 4148 */ 4149 bool rate_control_send_low(struct ieee80211_sta *sta, 4150 void *priv_sta, 4151 struct ieee80211_tx_rate_control *txrc); 4152 4153 4154 static inline s8 4155 rate_lowest_index(struct ieee80211_supported_band *sband, 4156 struct ieee80211_sta *sta) 4157 { 4158 int i; 4159 4160 for (i = 0; i < sband->n_bitrates; i++) 4161 if (rate_supported(sta, sband->band, i)) 4162 return i; 4163 4164 /* warn when we cannot find a rate. */ 4165 WARN_ON_ONCE(1); 4166 4167 /* and return 0 (the lowest index) */ 4168 return 0; 4169 } 4170 4171 static inline 4172 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 4173 struct ieee80211_sta *sta) 4174 { 4175 unsigned int i; 4176 4177 for (i = 0; i < sband->n_bitrates; i++) 4178 if (rate_supported(sta, sband->band, i)) 4179 return true; 4180 return false; 4181 } 4182 4183 int ieee80211_rate_control_register(struct rate_control_ops *ops); 4184 void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 4185 4186 static inline bool 4187 conf_is_ht20(struct ieee80211_conf *conf) 4188 { 4189 return conf->channel_type == NL80211_CHAN_HT20; 4190 } 4191 4192 static inline bool 4193 conf_is_ht40_minus(struct ieee80211_conf *conf) 4194 { 4195 return conf->channel_type == NL80211_CHAN_HT40MINUS; 4196 } 4197 4198 static inline bool 4199 conf_is_ht40_plus(struct ieee80211_conf *conf) 4200 { 4201 return conf->channel_type == NL80211_CHAN_HT40PLUS; 4202 } 4203 4204 static inline bool 4205 conf_is_ht40(struct ieee80211_conf *conf) 4206 { 4207 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 4208 } 4209 4210 static inline bool 4211 conf_is_ht(struct ieee80211_conf *conf) 4212 { 4213 return conf->channel_type != NL80211_CHAN_NO_HT; 4214 } 4215 4216 static inline enum nl80211_iftype 4217 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 4218 { 4219 if (p2p) { 4220 switch (type) { 4221 case NL80211_IFTYPE_STATION: 4222 return NL80211_IFTYPE_P2P_CLIENT; 4223 case NL80211_IFTYPE_AP: 4224 return NL80211_IFTYPE_P2P_GO; 4225 default: 4226 break; 4227 } 4228 } 4229 return type; 4230 } 4231 4232 static inline enum nl80211_iftype 4233 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 4234 { 4235 return ieee80211_iftype_p2p(vif->type, vif->p2p); 4236 } 4237 4238 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 4239 int rssi_min_thold, 4240 int rssi_max_thold); 4241 4242 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 4243 4244 /** 4245 * ieee80211_ave_rssi - report the average RSSI for the specified interface 4246 * 4247 * @vif: the specified virtual interface 4248 * 4249 * Note: This function assumes that the given vif is valid. 4250 * 4251 * Return: The average RSSI value for the requested interface, or 0 if not 4252 * applicable. 4253 */ 4254 int ieee80211_ave_rssi(struct ieee80211_vif *vif); 4255 4256 /** 4257 * ieee80211_report_wowlan_wakeup - report WoWLAN wakeup 4258 * @vif: virtual interface 4259 * @wakeup: wakeup reason(s) 4260 * @gfp: allocation flags 4261 * 4262 * See cfg80211_report_wowlan_wakeup(). 4263 */ 4264 void ieee80211_report_wowlan_wakeup(struct ieee80211_vif *vif, 4265 struct cfg80211_wowlan_wakeup *wakeup, 4266 gfp_t gfp); 4267 4268 #endif /* MAC80211_H */ 4269