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 = 4, 99 }; 100 101 /** 102 * enum ieee80211_ac_numbers - AC numbers as used in mac80211 103 * @IEEE80211_AC_VO: voice 104 * @IEEE80211_AC_VI: video 105 * @IEEE80211_AC_BE: best effort 106 * @IEEE80211_AC_BK: background 107 */ 108 enum ieee80211_ac_numbers { 109 IEEE80211_AC_VO = 0, 110 IEEE80211_AC_VI = 1, 111 IEEE80211_AC_BE = 2, 112 IEEE80211_AC_BK = 3, 113 }; 114 #define IEEE80211_NUM_ACS 4 115 116 /** 117 * struct ieee80211_tx_queue_params - transmit queue configuration 118 * 119 * The information provided in this structure is required for QoS 120 * transmit queue configuration. Cf. IEEE 802.11 7.3.2.29. 121 * 122 * @aifs: arbitration interframe space [0..255] 123 * @cw_min: minimum contention window [a value of the form 124 * 2^n-1 in the range 1..32767] 125 * @cw_max: maximum contention window [like @cw_min] 126 * @txop: maximum burst time in units of 32 usecs, 0 meaning disabled 127 * @uapsd: is U-APSD mode enabled for the queue 128 */ 129 struct ieee80211_tx_queue_params { 130 u16 txop; 131 u16 cw_min; 132 u16 cw_max; 133 u8 aifs; 134 bool uapsd; 135 }; 136 137 struct ieee80211_low_level_stats { 138 unsigned int dot11ACKFailureCount; 139 unsigned int dot11RTSFailureCount; 140 unsigned int dot11FCSErrorCount; 141 unsigned int dot11RTSSuccessCount; 142 }; 143 144 /** 145 * enum ieee80211_bss_change - BSS change notification flags 146 * 147 * These flags are used with the bss_info_changed() callback 148 * to indicate which BSS parameter changed. 149 * 150 * @BSS_CHANGED_ASSOC: association status changed (associated/disassociated), 151 * also implies a change in the AID. 152 * @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed 153 * @BSS_CHANGED_ERP_PREAMBLE: preamble changed 154 * @BSS_CHANGED_ERP_SLOT: slot timing changed 155 * @BSS_CHANGED_HT: 802.11n parameters changed 156 * @BSS_CHANGED_BASIC_RATES: Basic rateset changed 157 * @BSS_CHANGED_BEACON_INT: Beacon interval changed 158 * @BSS_CHANGED_BSSID: BSSID changed, for whatever 159 * reason (IBSS and managed mode) 160 * @BSS_CHANGED_BEACON: Beacon data changed, retrieve 161 * new beacon (beaconing modes) 162 * @BSS_CHANGED_BEACON_ENABLED: Beaconing should be 163 * enabled/disabled (beaconing modes) 164 * @BSS_CHANGED_CQM: Connection quality monitor config changed 165 * @BSS_CHANGED_IBSS: IBSS join status changed 166 * @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed. 167 * @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note 168 * that it is only ever disabled for station mode. 169 * @BSS_CHANGED_IDLE: Idle changed for this BSS/interface. 170 * @BSS_CHANGED_SSID: SSID changed for this BSS (AP mode) 171 * @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode) 172 */ 173 enum ieee80211_bss_change { 174 BSS_CHANGED_ASSOC = 1<<0, 175 BSS_CHANGED_ERP_CTS_PROT = 1<<1, 176 BSS_CHANGED_ERP_PREAMBLE = 1<<2, 177 BSS_CHANGED_ERP_SLOT = 1<<3, 178 BSS_CHANGED_HT = 1<<4, 179 BSS_CHANGED_BASIC_RATES = 1<<5, 180 BSS_CHANGED_BEACON_INT = 1<<6, 181 BSS_CHANGED_BSSID = 1<<7, 182 BSS_CHANGED_BEACON = 1<<8, 183 BSS_CHANGED_BEACON_ENABLED = 1<<9, 184 BSS_CHANGED_CQM = 1<<10, 185 BSS_CHANGED_IBSS = 1<<11, 186 BSS_CHANGED_ARP_FILTER = 1<<12, 187 BSS_CHANGED_QOS = 1<<13, 188 BSS_CHANGED_IDLE = 1<<14, 189 BSS_CHANGED_SSID = 1<<15, 190 BSS_CHANGED_AP_PROBE_RESP = 1<<16, 191 192 /* when adding here, make sure to change ieee80211_reconfig */ 193 }; 194 195 /* 196 * The maximum number of IPv4 addresses listed for ARP filtering. If the number 197 * of addresses for an interface increase beyond this value, hardware ARP 198 * filtering will be disabled. 199 */ 200 #define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4 201 202 /** 203 * enum ieee80211_rssi_event - RSSI threshold event 204 * An indicator for when RSSI goes below/above a certain threshold. 205 * @RSSI_EVENT_HIGH: AP's rssi crossed the high threshold set by the driver. 206 * @RSSI_EVENT_LOW: AP's rssi crossed the low threshold set by the driver. 207 */ 208 enum ieee80211_rssi_event { 209 RSSI_EVENT_HIGH, 210 RSSI_EVENT_LOW, 211 }; 212 213 /** 214 * struct ieee80211_bss_conf - holds the BSS's changing parameters 215 * 216 * This structure keeps information about a BSS (and an association 217 * to that BSS) that can change during the lifetime of the BSS. 218 * 219 * @assoc: association status 220 * @ibss_joined: indicates whether this station is part of an IBSS 221 * or not 222 * @aid: association ID number, valid only when @assoc is true 223 * @use_cts_prot: use CTS protection 224 * @use_short_preamble: use 802.11b short preamble; 225 * if the hardware cannot handle this it must set the 226 * IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag 227 * @use_short_slot: use short slot time (only relevant for ERP); 228 * if the hardware cannot handle this it must set the 229 * IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag 230 * @dtim_period: num of beacons before the next DTIM, for beaconing, 231 * valid in station mode only while @assoc is true and if also 232 * requested by %IEEE80211_HW_NEED_DTIM_PERIOD (cf. also hw conf 233 * @ps_dtim_period) 234 * @last_tsf: last beacon's/probe response's TSF timestamp (could be old 235 * as it may have been received during scanning long ago) 236 * @beacon_int: beacon interval 237 * @assoc_capability: capabilities taken from assoc resp 238 * @basic_rates: bitmap of basic rates, each bit stands for an 239 * index into the rate table configured by the driver in 240 * the current band. 241 * @mcast_rate: per-band multicast rate index + 1 (0: disabled) 242 * @bssid: The BSSID for this BSS 243 * @enable_beacon: whether beaconing should be enabled or not 244 * @channel_type: Channel type for this BSS -- the hardware might be 245 * configured for HT40+ while this BSS only uses no-HT, for 246 * example. 247 * @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info). 248 * This field is only valid when the channel type is one of the HT types. 249 * @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value 250 * implies disabled 251 * @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis 252 * @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The 253 * may filter ARP queries targeted for other addresses than listed here. 254 * The driver must allow ARP queries targeted for all address listed here 255 * to pass through. An empty list implies no ARP queries need to pass. 256 * @arp_addr_cnt: Number of addresses currently on the list. 257 * @arp_filter_enabled: Enable ARP filtering - if enabled, the hardware may 258 * filter ARP queries based on the @arp_addr_list, if disabled, the 259 * hardware must not perform any ARP filtering. Note, that the filter will 260 * be enabled also in promiscuous mode. 261 * @qos: This is a QoS-enabled BSS. 262 * @idle: This interface is idle. There's also a global idle flag in the 263 * hardware config which may be more appropriate depending on what 264 * your driver/device needs to do. 265 * @ssid: The SSID of the current vif. Only valid in AP-mode. 266 * @ssid_len: Length of SSID given in @ssid. 267 * @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode. 268 */ 269 struct ieee80211_bss_conf { 270 const u8 *bssid; 271 /* association related data */ 272 bool assoc, ibss_joined; 273 u16 aid; 274 /* erp related data */ 275 bool use_cts_prot; 276 bool use_short_preamble; 277 bool use_short_slot; 278 bool enable_beacon; 279 u8 dtim_period; 280 u16 beacon_int; 281 u16 assoc_capability; 282 u64 last_tsf; 283 u32 basic_rates; 284 int mcast_rate[IEEE80211_NUM_BANDS]; 285 u16 ht_operation_mode; 286 s32 cqm_rssi_thold; 287 u32 cqm_rssi_hyst; 288 enum nl80211_channel_type channel_type; 289 __be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN]; 290 u8 arp_addr_cnt; 291 bool arp_filter_enabled; 292 bool qos; 293 bool idle; 294 u8 ssid[IEEE80211_MAX_SSID_LEN]; 295 size_t ssid_len; 296 bool hidden_ssid; 297 }; 298 299 /** 300 * enum mac80211_tx_control_flags - flags to describe transmission information/status 301 * 302 * These flags are used with the @flags member of &ieee80211_tx_info. 303 * 304 * @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame. 305 * @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence 306 * number to this frame, taking care of not overwriting the fragment 307 * number and increasing the sequence number only when the 308 * IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly 309 * assign sequence numbers to QoS-data frames but cannot do so correctly 310 * for non-QoS-data and management frames because beacons need them from 311 * that counter as well and mac80211 cannot guarantee proper sequencing. 312 * If this flag is set, the driver should instruct the hardware to 313 * assign a sequence number to the frame or assign one itself. Cf. IEEE 314 * 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for 315 * beacons and always be clear for frames without a sequence number field. 316 * @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack 317 * @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination 318 * station 319 * @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame 320 * @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon 321 * @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU 322 * @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211. 323 * @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted 324 * because the destination STA was in powersave mode. Note that to 325 * avoid race conditions, the filter must be set by the hardware or 326 * firmware upon receiving a frame that indicates that the station 327 * went to sleep (must be done on device to filter frames already on 328 * the queue) and may only be unset after mac80211 gives the OK for 329 * that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above), 330 * since only then is it guaranteed that no more frames are in the 331 * hardware queue. 332 * @IEEE80211_TX_STAT_ACK: Frame was acknowledged 333 * @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status 334 * is for the whole aggregation. 335 * @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned, 336 * so consider using block ack request (BAR). 337 * @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be 338 * set by rate control algorithms to indicate probe rate, will 339 * be cleared for fragmented frames (except on the last fragment) 340 * @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211, 341 * used to indicate that a pending frame requires TX processing before 342 * it can be sent out. 343 * @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211, 344 * used to indicate that a frame was already retried due to PS 345 * @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211, 346 * used to indicate frame should not be encrypted 347 * @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll 348 * frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must 349 * be sent although the station is in powersave mode. 350 * @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the 351 * transmit function after the current frame, this can be used 352 * by drivers to kick the DMA queue only if unset or when the 353 * queue gets full. 354 * @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted 355 * after TX status because the destination was asleep, it must not 356 * be modified again (no seqno assignment, crypto, etc.) 357 * @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211 358 * MLME command (internal to mac80211 to figure out whether to send TX 359 * status to user space) 360 * @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame 361 * @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this 362 * frame and selects the maximum number of streams that it can use. 363 * @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on 364 * the off-channel channel when a remain-on-channel offload is done 365 * in hardware -- normal packets still flow and are expected to be 366 * handled properly by the device. 367 * @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP 368 * testing. It will be sent out with incorrect Michael MIC key to allow 369 * TKIP countermeasures to be tested. 370 * @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate. 371 * This flag is actually used for management frame especially for P2P 372 * frames not being sent at CCK rate in 2GHz band. 373 * @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period, 374 * when its status is reported the service period ends. For frames in 375 * an SP that mac80211 transmits, it is already set; for driver frames 376 * the driver may set this flag. It is also used to do the same for 377 * PS-Poll responses. 378 * @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate. 379 * This flag is used to send nullfunc frame at minimum rate when 380 * the nullfunc is used for connection monitoring purpose. 381 * @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it 382 * would be fragmented by size (this is optional, only used for 383 * monitor injection). 384 * 385 * Note: If you have to add new flags to the enumeration, then don't 386 * forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary. 387 */ 388 enum mac80211_tx_control_flags { 389 IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0), 390 IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1), 391 IEEE80211_TX_CTL_NO_ACK = BIT(2), 392 IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3), 393 IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4), 394 IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5), 395 IEEE80211_TX_CTL_AMPDU = BIT(6), 396 IEEE80211_TX_CTL_INJECTED = BIT(7), 397 IEEE80211_TX_STAT_TX_FILTERED = BIT(8), 398 IEEE80211_TX_STAT_ACK = BIT(9), 399 IEEE80211_TX_STAT_AMPDU = BIT(10), 400 IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11), 401 IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12), 402 IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14), 403 IEEE80211_TX_INTFL_RETRIED = BIT(15), 404 IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16), 405 IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17), 406 IEEE80211_TX_CTL_MORE_FRAMES = BIT(18), 407 IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19), 408 /* hole at 20, use later */ 409 IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21), 410 IEEE80211_TX_CTL_LDPC = BIT(22), 411 IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24), 412 IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25), 413 IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26), 414 IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27), 415 IEEE80211_TX_STATUS_EOSP = BIT(28), 416 IEEE80211_TX_CTL_USE_MINRATE = BIT(29), 417 IEEE80211_TX_CTL_DONTFRAG = BIT(30), 418 }; 419 420 #define IEEE80211_TX_CTL_STBC_SHIFT 23 421 422 /* 423 * This definition is used as a mask to clear all temporary flags, which are 424 * set by the tx handlers for each transmission attempt by the mac80211 stack. 425 */ 426 #define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \ 427 IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \ 428 IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \ 429 IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \ 430 IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \ 431 IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \ 432 IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \ 433 IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP) 434 435 /** 436 * enum mac80211_rate_control_flags - per-rate flags set by the 437 * Rate Control algorithm. 438 * 439 * These flags are set by the Rate control algorithm for each rate during tx, 440 * in the @flags member of struct ieee80211_tx_rate. 441 * 442 * @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate. 443 * @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required. 444 * This is set if the current BSS requires ERP protection. 445 * @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble. 446 * @IEEE80211_TX_RC_MCS: HT rate. 447 * @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in 448 * Greenfield mode. 449 * @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz. 450 * @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the 451 * adjacent 20 MHz channels, if the current channel type is 452 * NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS. 453 * @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate. 454 */ 455 enum mac80211_rate_control_flags { 456 IEEE80211_TX_RC_USE_RTS_CTS = BIT(0), 457 IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1), 458 IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2), 459 460 /* rate index is an MCS rate number instead of an index */ 461 IEEE80211_TX_RC_MCS = BIT(3), 462 IEEE80211_TX_RC_GREEN_FIELD = BIT(4), 463 IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5), 464 IEEE80211_TX_RC_DUP_DATA = BIT(6), 465 IEEE80211_TX_RC_SHORT_GI = BIT(7), 466 }; 467 468 469 /* there are 40 bytes if you don't need the rateset to be kept */ 470 #define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40 471 472 /* if you do need the rateset, then you have less space */ 473 #define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24 474 475 /* maximum number of rate stages */ 476 #define IEEE80211_TX_MAX_RATES 5 477 478 /** 479 * struct ieee80211_tx_rate - rate selection/status 480 * 481 * @idx: rate index to attempt to send with 482 * @flags: rate control flags (&enum mac80211_rate_control_flags) 483 * @count: number of tries in this rate before going to the next rate 484 * 485 * A value of -1 for @idx indicates an invalid rate and, if used 486 * in an array of retry rates, that no more rates should be tried. 487 * 488 * When used for transmit status reporting, the driver should 489 * always report the rate along with the flags it used. 490 * 491 * &struct ieee80211_tx_info contains an array of these structs 492 * in the control information, and it will be filled by the rate 493 * control algorithm according to what should be sent. For example, 494 * if this array contains, in the format { <idx>, <count> } the 495 * information 496 * { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 } 497 * then this means that the frame should be transmitted 498 * up to twice at rate 3, up to twice at rate 2, and up to four 499 * times at rate 1 if it doesn't get acknowledged. Say it gets 500 * acknowledged by the peer after the fifth attempt, the status 501 * information should then contain 502 * { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ... 503 * since it was transmitted twice at rate 3, twice at rate 2 504 * and once at rate 1 after which we received an acknowledgement. 505 */ 506 struct ieee80211_tx_rate { 507 s8 idx; 508 u8 count; 509 u8 flags; 510 } __packed; 511 512 /** 513 * struct ieee80211_tx_info - skb transmit information 514 * 515 * This structure is placed in skb->cb for three uses: 516 * (1) mac80211 TX control - mac80211 tells the driver what to do 517 * (2) driver internal use (if applicable) 518 * (3) TX status information - driver tells mac80211 what happened 519 * 520 * The TX control's sta pointer is only valid during the ->tx call, 521 * it may be NULL. 522 * 523 * @flags: transmit info flags, defined above 524 * @band: the band to transmit on (use for checking for races) 525 * @antenna_sel_tx: antenna to use, 0 for automatic diversity 526 * @ack_frame_id: internal frame ID for TX status, used internally 527 * @control: union for control data 528 * @status: union for status data 529 * @driver_data: array of driver_data pointers 530 * @ampdu_ack_len: number of acked aggregated frames. 531 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 532 * @ampdu_len: number of aggregated frames. 533 * relevant only if IEEE80211_TX_STAT_AMPDU was set. 534 * @ack_signal: signal strength of the ACK frame 535 */ 536 struct ieee80211_tx_info { 537 /* common information */ 538 u32 flags; 539 u8 band; 540 541 u8 antenna_sel_tx; 542 543 u16 ack_frame_id; 544 545 union { 546 struct { 547 union { 548 /* rate control */ 549 struct { 550 struct ieee80211_tx_rate rates[ 551 IEEE80211_TX_MAX_RATES]; 552 s8 rts_cts_rate_idx; 553 }; 554 /* only needed before rate control */ 555 unsigned long jiffies; 556 }; 557 /* NB: vif can be NULL for injected frames */ 558 struct ieee80211_vif *vif; 559 struct ieee80211_key_conf *hw_key; 560 struct ieee80211_sta *sta; 561 } control; 562 struct { 563 struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES]; 564 u8 ampdu_ack_len; 565 int ack_signal; 566 u8 ampdu_len; 567 /* 15 bytes free */ 568 } status; 569 struct { 570 struct ieee80211_tx_rate driver_rates[ 571 IEEE80211_TX_MAX_RATES]; 572 void *rate_driver_data[ 573 IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)]; 574 }; 575 void *driver_data[ 576 IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)]; 577 }; 578 }; 579 580 /** 581 * struct ieee80211_sched_scan_ies - scheduled scan IEs 582 * 583 * This structure is used to pass the appropriate IEs to be used in scheduled 584 * scans for all bands. It contains both the IEs passed from the userspace 585 * and the ones generated by mac80211. 586 * 587 * @ie: array with the IEs for each supported band 588 * @len: array with the total length of the IEs for each band 589 */ 590 struct ieee80211_sched_scan_ies { 591 u8 *ie[IEEE80211_NUM_BANDS]; 592 size_t len[IEEE80211_NUM_BANDS]; 593 }; 594 595 static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb) 596 { 597 return (struct ieee80211_tx_info *)skb->cb; 598 } 599 600 static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb) 601 { 602 return (struct ieee80211_rx_status *)skb->cb; 603 } 604 605 /** 606 * ieee80211_tx_info_clear_status - clear TX status 607 * 608 * @info: The &struct ieee80211_tx_info to be cleared. 609 * 610 * When the driver passes an skb back to mac80211, it must report 611 * a number of things in TX status. This function clears everything 612 * in the TX status but the rate control information (it does clear 613 * the count since you need to fill that in anyway). 614 * 615 * NOTE: You can only use this function if you do NOT use 616 * info->driver_data! Use info->rate_driver_data 617 * instead if you need only the less space that allows. 618 */ 619 static inline void 620 ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info) 621 { 622 int i; 623 624 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 625 offsetof(struct ieee80211_tx_info, control.rates)); 626 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 627 offsetof(struct ieee80211_tx_info, driver_rates)); 628 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8); 629 /* clear the rate counts */ 630 for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) 631 info->status.rates[i].count = 0; 632 633 BUILD_BUG_ON( 634 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23); 635 memset(&info->status.ampdu_ack_len, 0, 636 sizeof(struct ieee80211_tx_info) - 637 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len)); 638 } 639 640 641 /** 642 * enum mac80211_rx_flags - receive flags 643 * 644 * These flags are used with the @flag member of &struct ieee80211_rx_status. 645 * @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame. 646 * Use together with %RX_FLAG_MMIC_STRIPPED. 647 * @RX_FLAG_DECRYPTED: This frame was decrypted in hardware. 648 * @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame, 649 * verification has been done by the hardware. 650 * @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame. 651 * If this flag is set, the stack cannot do any replay detection 652 * hence the driver or hardware will have to do that. 653 * @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on 654 * the frame. 655 * @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on 656 * the frame. 657 * @RX_FLAG_MACTIME_MPDU: The timestamp passed in the RX status (@mactime 658 * field) is valid and contains the time the first symbol of the MPDU 659 * was received. This is useful in monitor mode and for proper IBSS 660 * merging. 661 * @RX_FLAG_SHORTPRE: Short preamble was used for this frame 662 * @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index 663 * @RX_FLAG_40MHZ: HT40 (40 MHz) was used 664 * @RX_FLAG_SHORT_GI: Short guard interval was used 665 * @RX_FLAG_NO_SIGNAL_VAL: The signal strength value is not present. 666 * Valid only for data frames (mainly A-MPDU) 667 */ 668 enum mac80211_rx_flags { 669 RX_FLAG_MMIC_ERROR = 1<<0, 670 RX_FLAG_DECRYPTED = 1<<1, 671 RX_FLAG_MMIC_STRIPPED = 1<<3, 672 RX_FLAG_IV_STRIPPED = 1<<4, 673 RX_FLAG_FAILED_FCS_CRC = 1<<5, 674 RX_FLAG_FAILED_PLCP_CRC = 1<<6, 675 RX_FLAG_MACTIME_MPDU = 1<<7, 676 RX_FLAG_SHORTPRE = 1<<8, 677 RX_FLAG_HT = 1<<9, 678 RX_FLAG_40MHZ = 1<<10, 679 RX_FLAG_SHORT_GI = 1<<11, 680 RX_FLAG_NO_SIGNAL_VAL = 1<<12, 681 }; 682 683 /** 684 * struct ieee80211_rx_status - receive status 685 * 686 * The low-level driver should provide this information (the subset 687 * supported by hardware) to the 802.11 code with each received 688 * frame, in the skb's control buffer (cb). 689 * 690 * @mactime: value in microseconds of the 64-bit Time Synchronization Function 691 * (TSF) timer when the first data symbol (MPDU) arrived at the hardware. 692 * @band: the active band when this frame was received 693 * @freq: frequency the radio was tuned to when receiving this frame, in MHz 694 * @signal: signal strength when receiving this frame, either in dBm, in dB or 695 * unspecified depending on the hardware capabilities flags 696 * @IEEE80211_HW_SIGNAL_* 697 * @antenna: antenna used 698 * @rate_idx: index of data rate into band's supported rates or MCS index if 699 * HT rates are use (RX_FLAG_HT) 700 * @flag: %RX_FLAG_* 701 * @rx_flags: internal RX flags for mac80211 702 */ 703 struct ieee80211_rx_status { 704 u64 mactime; 705 enum ieee80211_band band; 706 int freq; 707 int signal; 708 int antenna; 709 int rate_idx; 710 int flag; 711 unsigned int rx_flags; 712 }; 713 714 /** 715 * enum ieee80211_conf_flags - configuration flags 716 * 717 * Flags to define PHY configuration options 718 * 719 * @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this 720 * to determine for example whether to calculate timestamps for packets 721 * or not, do not use instead of filter flags! 722 * @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only). 723 * This is the power save mode defined by IEEE 802.11-2007 section 11.2, 724 * meaning that the hardware still wakes up for beacons, is able to 725 * transmit frames and receive the possible acknowledgment frames. 726 * Not to be confused with hardware specific wakeup/sleep states, 727 * driver is responsible for that. See the section "Powersave support" 728 * for more. 729 * @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set 730 * the driver should be prepared to handle configuration requests but 731 * may turn the device off as much as possible. Typically, this flag will 732 * be set when an interface is set UP but not associated or scanning, but 733 * it can also be unset in that case when monitor interfaces are active. 734 * @IEEE80211_CONF_OFFCHANNEL: The device is currently not on its main 735 * operating channel. 736 */ 737 enum ieee80211_conf_flags { 738 IEEE80211_CONF_MONITOR = (1<<0), 739 IEEE80211_CONF_PS = (1<<1), 740 IEEE80211_CONF_IDLE = (1<<2), 741 IEEE80211_CONF_OFFCHANNEL = (1<<3), 742 }; 743 744 745 /** 746 * enum ieee80211_conf_changed - denotes which configuration changed 747 * 748 * @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed 749 * @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed 750 * @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed 751 * @IEEE80211_CONF_CHANGE_POWER: the TX power changed 752 * @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed 753 * @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed 754 * @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed 755 * @IEEE80211_CONF_CHANGE_SMPS: Spatial multiplexing powersave mode changed 756 */ 757 enum ieee80211_conf_changed { 758 IEEE80211_CONF_CHANGE_SMPS = BIT(1), 759 IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2), 760 IEEE80211_CONF_CHANGE_MONITOR = BIT(3), 761 IEEE80211_CONF_CHANGE_PS = BIT(4), 762 IEEE80211_CONF_CHANGE_POWER = BIT(5), 763 IEEE80211_CONF_CHANGE_CHANNEL = BIT(6), 764 IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7), 765 IEEE80211_CONF_CHANGE_IDLE = BIT(8), 766 }; 767 768 /** 769 * enum ieee80211_smps_mode - spatial multiplexing power save mode 770 * 771 * @IEEE80211_SMPS_AUTOMATIC: automatic 772 * @IEEE80211_SMPS_OFF: off 773 * @IEEE80211_SMPS_STATIC: static 774 * @IEEE80211_SMPS_DYNAMIC: dynamic 775 * @IEEE80211_SMPS_NUM_MODES: internal, don't use 776 */ 777 enum ieee80211_smps_mode { 778 IEEE80211_SMPS_AUTOMATIC, 779 IEEE80211_SMPS_OFF, 780 IEEE80211_SMPS_STATIC, 781 IEEE80211_SMPS_DYNAMIC, 782 783 /* keep last */ 784 IEEE80211_SMPS_NUM_MODES, 785 }; 786 787 /** 788 * struct ieee80211_conf - configuration of the device 789 * 790 * This struct indicates how the driver shall configure the hardware. 791 * 792 * @flags: configuration flags defined above 793 * 794 * @listen_interval: listen interval in units of beacon interval 795 * @max_sleep_period: the maximum number of beacon intervals to sleep for 796 * before checking the beacon for a TIM bit (managed mode only); this 797 * value will be only achievable between DTIM frames, the hardware 798 * needs to check for the multicast traffic bit in DTIM beacons. 799 * This variable is valid only when the CONF_PS flag is set. 800 * @ps_dtim_period: The DTIM period of the AP we're connected to, for use 801 * in power saving. Power saving will not be enabled until a beacon 802 * has been received and the DTIM period is known. 803 * @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the 804 * powersave documentation below. This variable is valid only when 805 * the CONF_PS flag is set. 806 * 807 * @power_level: requested transmit power (in dBm) 808 * 809 * @channel: the channel to tune to 810 * @channel_type: the channel (HT) type 811 * 812 * @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame 813 * (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11, 814 * but actually means the number of transmissions not the number of retries 815 * @short_frame_max_tx_count: Maximum number of transmissions for a "short" 816 * frame, called "dot11ShortRetryLimit" in 802.11, but actually means the 817 * number of transmissions not the number of retries 818 * 819 * @smps_mode: spatial multiplexing powersave mode; note that 820 * %IEEE80211_SMPS_STATIC is used when the device is not 821 * configured for an HT channel 822 */ 823 struct ieee80211_conf { 824 u32 flags; 825 int power_level, dynamic_ps_timeout; 826 int max_sleep_period; 827 828 u16 listen_interval; 829 u8 ps_dtim_period; 830 831 u8 long_frame_max_tx_count, short_frame_max_tx_count; 832 833 struct ieee80211_channel *channel; 834 enum nl80211_channel_type channel_type; 835 enum ieee80211_smps_mode smps_mode; 836 }; 837 838 /** 839 * struct ieee80211_channel_switch - holds the channel switch data 840 * 841 * The information provided in this structure is required for channel switch 842 * operation. 843 * 844 * @timestamp: value in microseconds of the 64-bit Time Synchronization 845 * Function (TSF) timer when the frame containing the channel switch 846 * announcement was received. This is simply the rx.mactime parameter 847 * the driver passed into mac80211. 848 * @block_tx: Indicates whether transmission must be blocked before the 849 * scheduled channel switch, as indicated by the AP. 850 * @channel: the new channel to switch to 851 * @count: the number of TBTT's until the channel switch event 852 */ 853 struct ieee80211_channel_switch { 854 u64 timestamp; 855 bool block_tx; 856 struct ieee80211_channel *channel; 857 u8 count; 858 }; 859 860 /** 861 * enum ieee80211_vif_flags - virtual interface flags 862 * 863 * @IEEE80211_VIF_BEACON_FILTER: the device performs beacon filtering 864 * on this virtual interface to avoid unnecessary CPU wakeups 865 * @IEEE80211_VIF_SUPPORTS_CQM_RSSI: the device can do connection quality 866 * monitoring on this virtual interface -- i.e. it can monitor 867 * connection quality related parameters, such as the RSSI level and 868 * provide notifications if configured trigger levels are reached. 869 */ 870 enum ieee80211_vif_flags { 871 IEEE80211_VIF_BEACON_FILTER = BIT(0), 872 IEEE80211_VIF_SUPPORTS_CQM_RSSI = BIT(1), 873 }; 874 875 /** 876 * struct ieee80211_vif - per-interface data 877 * 878 * Data in this structure is continually present for driver 879 * use during the life of a virtual interface. 880 * 881 * @type: type of this virtual interface 882 * @bss_conf: BSS configuration for this interface, either our own 883 * or the BSS we're associated to 884 * @addr: address of this interface 885 * @p2p: indicates whether this AP or STA interface is a p2p 886 * interface, i.e. a GO or p2p-sta respectively 887 * @driver_flags: flags/capabilities the driver has for this interface, 888 * these need to be set (or cleared) when the interface is added 889 * or, if supported by the driver, the interface type is changed 890 * at runtime, mac80211 will never touch this field 891 * @drv_priv: data area for driver use, will always be aligned to 892 * sizeof(void *). 893 */ 894 struct ieee80211_vif { 895 enum nl80211_iftype type; 896 struct ieee80211_bss_conf bss_conf; 897 u8 addr[ETH_ALEN]; 898 bool p2p; 899 u32 driver_flags; 900 /* must be last */ 901 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 902 }; 903 904 static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif) 905 { 906 #ifdef CONFIG_MAC80211_MESH 907 return vif->type == NL80211_IFTYPE_MESH_POINT; 908 #endif 909 return false; 910 } 911 912 /** 913 * enum ieee80211_key_flags - key flags 914 * 915 * These flags are used for communication about keys between the driver 916 * and mac80211, with the @flags parameter of &struct ieee80211_key_conf. 917 * 918 * @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates 919 * that the STA this key will be used with could be using QoS. 920 * @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the 921 * driver to indicate that it requires IV generation for this 922 * particular key. 923 * @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by 924 * the driver for a TKIP key if it requires Michael MIC 925 * generation in software. 926 * @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates 927 * that the key is pairwise rather then a shared key. 928 * @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a 929 * CCMP key if it requires CCMP encryption of management frames (MFP) to 930 * be done in software. 931 * @IEEE80211_KEY_FLAG_PUT_IV_SPACE: This flag should be set by the driver 932 * for a CCMP key if space should be prepared for the IV, but the IV 933 * itself should not be generated. Do not set together with 934 * @IEEE80211_KEY_FLAG_GENERATE_IV on the same key. 935 */ 936 enum ieee80211_key_flags { 937 IEEE80211_KEY_FLAG_WMM_STA = 1<<0, 938 IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1, 939 IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2, 940 IEEE80211_KEY_FLAG_PAIRWISE = 1<<3, 941 IEEE80211_KEY_FLAG_SW_MGMT = 1<<4, 942 IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5, 943 }; 944 945 /** 946 * struct ieee80211_key_conf - key information 947 * 948 * This key information is given by mac80211 to the driver by 949 * the set_key() callback in &struct ieee80211_ops. 950 * 951 * @hw_key_idx: To be set by the driver, this is the key index the driver 952 * wants to be given when a frame is transmitted and needs to be 953 * encrypted in hardware. 954 * @cipher: The key's cipher suite selector. 955 * @flags: key flags, see &enum ieee80211_key_flags. 956 * @keyidx: the key index (0-3) 957 * @keylen: key material length 958 * @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte) 959 * data block: 960 * - Temporal Encryption Key (128 bits) 961 * - Temporal Authenticator Tx MIC Key (64 bits) 962 * - Temporal Authenticator Rx MIC Key (64 bits) 963 * @icv_len: The ICV length for this key type 964 * @iv_len: The IV length for this key type 965 */ 966 struct ieee80211_key_conf { 967 u32 cipher; 968 u8 icv_len; 969 u8 iv_len; 970 u8 hw_key_idx; 971 u8 flags; 972 s8 keyidx; 973 u8 keylen; 974 u8 key[0]; 975 }; 976 977 /** 978 * enum set_key_cmd - key command 979 * 980 * Used with the set_key() callback in &struct ieee80211_ops, this 981 * indicates whether a key is being removed or added. 982 * 983 * @SET_KEY: a key is set 984 * @DISABLE_KEY: a key must be disabled 985 */ 986 enum set_key_cmd { 987 SET_KEY, DISABLE_KEY, 988 }; 989 990 /** 991 * enum ieee80211_sta_state - station state 992 * 993 * @IEEE80211_STA_NOTEXIST: station doesn't exist at all, 994 * this is a special state for add/remove transitions 995 * @IEEE80211_STA_NONE: station exists without special state 996 * @IEEE80211_STA_AUTH: station is authenticated 997 * @IEEE80211_STA_ASSOC: station is associated 998 * @IEEE80211_STA_AUTHORIZED: station is authorized (802.1X) 999 */ 1000 enum ieee80211_sta_state { 1001 /* NOTE: These need to be ordered correctly! */ 1002 IEEE80211_STA_NOTEXIST, 1003 IEEE80211_STA_NONE, 1004 IEEE80211_STA_AUTH, 1005 IEEE80211_STA_ASSOC, 1006 IEEE80211_STA_AUTHORIZED, 1007 }; 1008 1009 /** 1010 * struct ieee80211_sta - station table entry 1011 * 1012 * A station table entry represents a station we are possibly 1013 * communicating with. Since stations are RCU-managed in 1014 * mac80211, any ieee80211_sta pointer you get access to must 1015 * either be protected by rcu_read_lock() explicitly or implicitly, 1016 * or you must take good care to not use such a pointer after a 1017 * call to your sta_remove callback that removed it. 1018 * 1019 * @addr: MAC address 1020 * @aid: AID we assigned to the station if we're an AP 1021 * @supp_rates: Bitmap of supported rates (per band) 1022 * @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities 1023 * @wme: indicates whether the STA supports WME. Only valid during AP-mode. 1024 * @drv_priv: data area for driver use, will always be aligned to 1025 * sizeof(void *), size is determined in hw information. 1026 * @uapsd_queues: bitmap of queues configured for uapsd. Only valid 1027 * if wme is supported. 1028 * @max_sp: max Service Period. Only valid if wme is supported. 1029 */ 1030 struct ieee80211_sta { 1031 u32 supp_rates[IEEE80211_NUM_BANDS]; 1032 u8 addr[ETH_ALEN]; 1033 u16 aid; 1034 struct ieee80211_sta_ht_cap ht_cap; 1035 bool wme; 1036 u8 uapsd_queues; 1037 u8 max_sp; 1038 1039 /* must be last */ 1040 u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *)))); 1041 }; 1042 1043 /** 1044 * enum sta_notify_cmd - sta notify command 1045 * 1046 * Used with the sta_notify() callback in &struct ieee80211_ops, this 1047 * indicates if an associated station made a power state transition. 1048 * 1049 * @STA_NOTIFY_SLEEP: a station is now sleeping 1050 * @STA_NOTIFY_AWAKE: a sleeping station woke up 1051 */ 1052 enum sta_notify_cmd { 1053 STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE, 1054 }; 1055 1056 /** 1057 * enum ieee80211_hw_flags - hardware flags 1058 * 1059 * These flags are used to indicate hardware capabilities to 1060 * the stack. Generally, flags here should have their meaning 1061 * done in a way that the simplest hardware doesn't need setting 1062 * any particular flags. There are some exceptions to this rule, 1063 * however, so you are advised to review these flags carefully. 1064 * 1065 * @IEEE80211_HW_HAS_RATE_CONTROL: 1066 * The hardware or firmware includes rate control, and cannot be 1067 * controlled by the stack. As such, no rate control algorithm 1068 * should be instantiated, and the TX rate reported to userspace 1069 * will be taken from the TX status instead of the rate control 1070 * algorithm. 1071 * Note that this requires that the driver implement a number of 1072 * callbacks so it has the correct information, it needs to have 1073 * the @set_rts_threshold callback and must look at the BSS config 1074 * @use_cts_prot for G/N protection, @use_short_slot for slot 1075 * timing in 2.4 GHz and @use_short_preamble for preambles for 1076 * CCK frames. 1077 * 1078 * @IEEE80211_HW_RX_INCLUDES_FCS: 1079 * Indicates that received frames passed to the stack include 1080 * the FCS at the end. 1081 * 1082 * @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING: 1083 * Some wireless LAN chipsets buffer broadcast/multicast frames 1084 * for power saving stations in the hardware/firmware and others 1085 * rely on the host system for such buffering. This option is used 1086 * to configure the IEEE 802.11 upper layer to buffer broadcast and 1087 * multicast frames when there are power saving stations so that 1088 * the driver can fetch them with ieee80211_get_buffered_bc(). 1089 * 1090 * @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE: 1091 * Hardware is not capable of short slot operation on the 2.4 GHz band. 1092 * 1093 * @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE: 1094 * Hardware is not capable of receiving frames with short preamble on 1095 * the 2.4 GHz band. 1096 * 1097 * @IEEE80211_HW_SIGNAL_UNSPEC: 1098 * Hardware can provide signal values but we don't know its units. We 1099 * expect values between 0 and @max_signal. 1100 * If possible please provide dB or dBm instead. 1101 * 1102 * @IEEE80211_HW_SIGNAL_DBM: 1103 * Hardware gives signal values in dBm, decibel difference from 1104 * one milliwatt. This is the preferred method since it is standardized 1105 * between different devices. @max_signal does not need to be set. 1106 * 1107 * @IEEE80211_HW_SPECTRUM_MGMT: 1108 * Hardware supports spectrum management defined in 802.11h 1109 * Measurement, Channel Switch, Quieting, TPC 1110 * 1111 * @IEEE80211_HW_AMPDU_AGGREGATION: 1112 * Hardware supports 11n A-MPDU aggregation. 1113 * 1114 * @IEEE80211_HW_SUPPORTS_PS: 1115 * Hardware has power save support (i.e. can go to sleep). 1116 * 1117 * @IEEE80211_HW_PS_NULLFUNC_STACK: 1118 * Hardware requires nullfunc frame handling in stack, implies 1119 * stack support for dynamic PS. 1120 * 1121 * @IEEE80211_HW_SUPPORTS_DYNAMIC_PS: 1122 * Hardware has support for dynamic PS. 1123 * 1124 * @IEEE80211_HW_MFP_CAPABLE: 1125 * Hardware supports management frame protection (MFP, IEEE 802.11w). 1126 * 1127 * @IEEE80211_HW_SUPPORTS_STATIC_SMPS: 1128 * Hardware supports static spatial multiplexing powersave, 1129 * ie. can turn off all but one chain even on HT connections 1130 * that should be using more chains. 1131 * 1132 * @IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS: 1133 * Hardware supports dynamic spatial multiplexing powersave, 1134 * ie. can turn off all but one chain and then wake the rest 1135 * up as required after, for example, rts/cts handshake. 1136 * 1137 * @IEEE80211_HW_SUPPORTS_UAPSD: 1138 * Hardware supports Unscheduled Automatic Power Save Delivery 1139 * (U-APSD) in managed mode. The mode is configured with 1140 * conf_tx() operation. 1141 * 1142 * @IEEE80211_HW_REPORTS_TX_ACK_STATUS: 1143 * Hardware can provide ack status reports of Tx frames to 1144 * the stack. 1145 * 1146 * @IEEE80211_HW_CONNECTION_MONITOR: 1147 * The hardware performs its own connection monitoring, including 1148 * periodic keep-alives to the AP and probing the AP on beacon loss. 1149 * When this flag is set, signaling beacon-loss will cause an immediate 1150 * change to disassociated state. 1151 * 1152 * @IEEE80211_HW_NEED_DTIM_PERIOD: 1153 * This device needs to know the DTIM period for the BSS before 1154 * associating. 1155 * 1156 * @IEEE80211_HW_SUPPORTS_PER_STA_GTK: The device's crypto engine supports 1157 * per-station GTKs as used by IBSS RSN or during fast transition. If 1158 * the device doesn't support per-station GTKs, but can be asked not 1159 * to decrypt group addressed frames, then IBSS RSN support is still 1160 * possible but software crypto will be used. Advertise the wiphy flag 1161 * only in that case. 1162 * 1163 * @IEEE80211_HW_AP_LINK_PS: When operating in AP mode the device 1164 * autonomously manages the PS status of connected stations. When 1165 * this flag is set mac80211 will not trigger PS mode for connected 1166 * stations based on the PM bit of incoming frames. 1167 * Use ieee80211_start_ps()/ieee8021_end_ps() to manually configure 1168 * the PS mode of connected stations. 1169 * 1170 * @IEEE80211_HW_TX_AMPDU_SETUP_IN_HW: The device handles TX A-MPDU session 1171 * setup strictly in HW. mac80211 should not attempt to do this in 1172 * software. 1173 * 1174 * @IEEE80211_HW_SCAN_WHILE_IDLE: The device can do hw scan while 1175 * being idle (i.e. mac80211 doesn't have to go idle-off during the 1176 * the scan). 1177 */ 1178 enum ieee80211_hw_flags { 1179 IEEE80211_HW_HAS_RATE_CONTROL = 1<<0, 1180 IEEE80211_HW_RX_INCLUDES_FCS = 1<<1, 1181 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2, 1182 IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3, 1183 IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4, 1184 IEEE80211_HW_SIGNAL_UNSPEC = 1<<5, 1185 IEEE80211_HW_SIGNAL_DBM = 1<<6, 1186 IEEE80211_HW_NEED_DTIM_PERIOD = 1<<7, 1187 IEEE80211_HW_SPECTRUM_MGMT = 1<<8, 1188 IEEE80211_HW_AMPDU_AGGREGATION = 1<<9, 1189 IEEE80211_HW_SUPPORTS_PS = 1<<10, 1190 IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11, 1191 IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12, 1192 IEEE80211_HW_MFP_CAPABLE = 1<<13, 1193 /* reuse bit 14 */ 1194 IEEE80211_HW_SUPPORTS_STATIC_SMPS = 1<<15, 1195 IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS = 1<<16, 1196 IEEE80211_HW_SUPPORTS_UAPSD = 1<<17, 1197 IEEE80211_HW_REPORTS_TX_ACK_STATUS = 1<<18, 1198 IEEE80211_HW_CONNECTION_MONITOR = 1<<19, 1199 /* reuse bit 20 */ 1200 IEEE80211_HW_SUPPORTS_PER_STA_GTK = 1<<21, 1201 IEEE80211_HW_AP_LINK_PS = 1<<22, 1202 IEEE80211_HW_TX_AMPDU_SETUP_IN_HW = 1<<23, 1203 IEEE80211_HW_SCAN_WHILE_IDLE = 1<<24, 1204 }; 1205 1206 /** 1207 * struct ieee80211_hw - hardware information and state 1208 * 1209 * This structure contains the configuration and hardware 1210 * information for an 802.11 PHY. 1211 * 1212 * @wiphy: This points to the &struct wiphy allocated for this 1213 * 802.11 PHY. You must fill in the @perm_addr and @dev 1214 * members of this structure using SET_IEEE80211_DEV() 1215 * and SET_IEEE80211_PERM_ADDR(). Additionally, all supported 1216 * bands (with channels, bitrates) are registered here. 1217 * 1218 * @conf: &struct ieee80211_conf, device configuration, don't use. 1219 * 1220 * @priv: pointer to private area that was allocated for driver use 1221 * along with this structure. 1222 * 1223 * @flags: hardware flags, see &enum ieee80211_hw_flags. 1224 * 1225 * @extra_tx_headroom: headroom to reserve in each transmit skb 1226 * for use by the driver (e.g. for transmit headers.) 1227 * 1228 * @channel_change_time: time (in microseconds) it takes to change channels. 1229 * 1230 * @max_signal: Maximum value for signal (rssi) in RX information, used 1231 * only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB 1232 * 1233 * @max_listen_interval: max listen interval in units of beacon interval 1234 * that HW supports 1235 * 1236 * @queues: number of available hardware transmit queues for 1237 * data packets. WMM/QoS requires at least four, these 1238 * queues need to have configurable access parameters. 1239 * 1240 * @rate_control_algorithm: rate control algorithm for this hardware. 1241 * If unset (NULL), the default algorithm will be used. Must be 1242 * set before calling ieee80211_register_hw(). 1243 * 1244 * @vif_data_size: size (in bytes) of the drv_priv data area 1245 * within &struct ieee80211_vif. 1246 * @sta_data_size: size (in bytes) of the drv_priv data area 1247 * within &struct ieee80211_sta. 1248 * 1249 * @max_rates: maximum number of alternate rate retry stages the hw 1250 * can handle. 1251 * @max_report_rates: maximum number of alternate rate retry stages 1252 * the hw can report back. 1253 * @max_rate_tries: maximum number of tries for each stage 1254 * 1255 * @napi_weight: weight used for NAPI polling. You must specify an 1256 * appropriate value here if a napi_poll operation is provided 1257 * by your driver. 1258 * 1259 * @max_rx_aggregation_subframes: maximum buffer size (number of 1260 * sub-frames) to be used for A-MPDU block ack receiver 1261 * aggregation. 1262 * This is only relevant if the device has restrictions on the 1263 * number of subframes, if it relies on mac80211 to do reordering 1264 * it shouldn't be set. 1265 * 1266 * @max_tx_aggregation_subframes: maximum number of subframes in an 1267 * aggregate an HT driver will transmit, used by the peer as a 1268 * hint to size its reorder buffer. 1269 */ 1270 struct ieee80211_hw { 1271 struct ieee80211_conf conf; 1272 struct wiphy *wiphy; 1273 const char *rate_control_algorithm; 1274 void *priv; 1275 u32 flags; 1276 unsigned int extra_tx_headroom; 1277 int channel_change_time; 1278 int vif_data_size; 1279 int sta_data_size; 1280 int napi_weight; 1281 u16 queues; 1282 u16 max_listen_interval; 1283 s8 max_signal; 1284 u8 max_rates; 1285 u8 max_report_rates; 1286 u8 max_rate_tries; 1287 u8 max_rx_aggregation_subframes; 1288 u8 max_tx_aggregation_subframes; 1289 }; 1290 1291 /** 1292 * wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy 1293 * 1294 * @wiphy: the &struct wiphy which we want to query 1295 * 1296 * mac80211 drivers can use this to get to their respective 1297 * &struct ieee80211_hw. Drivers wishing to get to their own private 1298 * structure can then access it via hw->priv. Note that mac802111 drivers should 1299 * not use wiphy_priv() to try to get their private driver structure as this 1300 * is already used internally by mac80211. 1301 */ 1302 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy); 1303 1304 /** 1305 * SET_IEEE80211_DEV - set device for 802.11 hardware 1306 * 1307 * @hw: the &struct ieee80211_hw to set the device for 1308 * @dev: the &struct device of this 802.11 device 1309 */ 1310 static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev) 1311 { 1312 set_wiphy_dev(hw->wiphy, dev); 1313 } 1314 1315 /** 1316 * SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware 1317 * 1318 * @hw: the &struct ieee80211_hw to set the MAC address for 1319 * @addr: the address to set 1320 */ 1321 static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr) 1322 { 1323 memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN); 1324 } 1325 1326 static inline struct ieee80211_rate * 1327 ieee80211_get_tx_rate(const struct ieee80211_hw *hw, 1328 const struct ieee80211_tx_info *c) 1329 { 1330 if (WARN_ON_ONCE(c->control.rates[0].idx < 0)) 1331 return NULL; 1332 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx]; 1333 } 1334 1335 static inline struct ieee80211_rate * 1336 ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw, 1337 const struct ieee80211_tx_info *c) 1338 { 1339 if (c->control.rts_cts_rate_idx < 0) 1340 return NULL; 1341 return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx]; 1342 } 1343 1344 static inline struct ieee80211_rate * 1345 ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, 1346 const struct ieee80211_tx_info *c, int idx) 1347 { 1348 if (c->control.rates[idx + 1].idx < 0) 1349 return NULL; 1350 return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx]; 1351 } 1352 1353 /** 1354 * ieee80211_free_txskb - free TX skb 1355 * @hw: the hardware 1356 * @skb: the skb 1357 * 1358 * Free a transmit skb. Use this funtion when some failure 1359 * to transmit happened and thus status cannot be reported. 1360 */ 1361 void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb); 1362 1363 /** 1364 * DOC: Hardware crypto acceleration 1365 * 1366 * mac80211 is capable of taking advantage of many hardware 1367 * acceleration designs for encryption and decryption operations. 1368 * 1369 * The set_key() callback in the &struct ieee80211_ops for a given 1370 * device is called to enable hardware acceleration of encryption and 1371 * decryption. The callback takes a @sta parameter that will be NULL 1372 * for default keys or keys used for transmission only, or point to 1373 * the station information for the peer for individual keys. 1374 * Multiple transmission keys with the same key index may be used when 1375 * VLANs are configured for an access point. 1376 * 1377 * When transmitting, the TX control data will use the @hw_key_idx 1378 * selected by the driver by modifying the &struct ieee80211_key_conf 1379 * pointed to by the @key parameter to the set_key() function. 1380 * 1381 * The set_key() call for the %SET_KEY command should return 0 if 1382 * the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be 1383 * added; if you return 0 then hw_key_idx must be assigned to the 1384 * hardware key index, you are free to use the full u8 range. 1385 * 1386 * When the cmd is %DISABLE_KEY then it must succeed. 1387 * 1388 * Note that it is permissible to not decrypt a frame even if a key 1389 * for it has been uploaded to hardware, the stack will not make any 1390 * decision based on whether a key has been uploaded or not but rather 1391 * based on the receive flags. 1392 * 1393 * The &struct ieee80211_key_conf structure pointed to by the @key 1394 * parameter is guaranteed to be valid until another call to set_key() 1395 * removes it, but it can only be used as a cookie to differentiate 1396 * keys. 1397 * 1398 * In TKIP some HW need to be provided a phase 1 key, for RX decryption 1399 * acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key 1400 * handler. 1401 * The update_tkip_key() call updates the driver with the new phase 1 key. 1402 * This happens every time the iv16 wraps around (every 65536 packets). The 1403 * set_key() call will happen only once for each key (unless the AP did 1404 * rekeying), it will not include a valid phase 1 key. The valid phase 1 key is 1405 * provided by update_tkip_key only. The trigger that makes mac80211 call this 1406 * handler is software decryption with wrap around of iv16. 1407 */ 1408 1409 /** 1410 * DOC: Powersave support 1411 * 1412 * mac80211 has support for various powersave implementations. 1413 * 1414 * First, it can support hardware that handles all powersaving by itself, 1415 * such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS hardware 1416 * flag. In that case, it will be told about the desired powersave mode 1417 * with the %IEEE80211_CONF_PS flag depending on the association status. 1418 * The hardware must take care of sending nullfunc frames when necessary, 1419 * i.e. when entering and leaving powersave mode. The hardware is required 1420 * to look at the AID in beacons and signal to the AP that it woke up when 1421 * it finds traffic directed to it. 1422 * 1423 * %IEEE80211_CONF_PS flag enabled means that the powersave mode defined in 1424 * IEEE 802.11-2007 section 11.2 is enabled. This is not to be confused 1425 * with hardware wakeup and sleep states. Driver is responsible for waking 1426 * up the hardware before issuing commands to the hardware and putting it 1427 * back to sleep at appropriate times. 1428 * 1429 * When PS is enabled, hardware needs to wakeup for beacons and receive the 1430 * buffered multicast/broadcast frames after the beacon. Also it must be 1431 * possible to send frames and receive the acknowledment frame. 1432 * 1433 * Other hardware designs cannot send nullfunc frames by themselves and also 1434 * need software support for parsing the TIM bitmap. This is also supported 1435 * by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and 1436 * %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still 1437 * required to pass up beacons. The hardware is still required to handle 1438 * waking up for multicast traffic; if it cannot the driver must handle that 1439 * as best as it can, mac80211 is too slow to do that. 1440 * 1441 * Dynamic powersave is an extension to normal powersave in which the 1442 * hardware stays awake for a user-specified period of time after sending a 1443 * frame so that reply frames need not be buffered and therefore delayed to 1444 * the next wakeup. It's compromise of getting good enough latency when 1445 * there's data traffic and still saving significantly power in idle 1446 * periods. 1447 * 1448 * Dynamic powersave is simply supported by mac80211 enabling and disabling 1449 * PS based on traffic. Driver needs to only set %IEEE80211_HW_SUPPORTS_PS 1450 * flag and mac80211 will handle everything automatically. Additionally, 1451 * hardware having support for the dynamic PS feature may set the 1452 * %IEEE80211_HW_SUPPORTS_DYNAMIC_PS flag to indicate that it can support 1453 * dynamic PS mode itself. The driver needs to look at the 1454 * @dynamic_ps_timeout hardware configuration value and use it that value 1455 * whenever %IEEE80211_CONF_PS is set. In this case mac80211 will disable 1456 * dynamic PS feature in stack and will just keep %IEEE80211_CONF_PS 1457 * enabled whenever user has enabled powersave. 1458 * 1459 * Some hardware need to toggle a single shared antenna between WLAN and 1460 * Bluetooth to facilitate co-existence. These types of hardware set 1461 * limitations on the use of host controlled dynamic powersave whenever there 1462 * is simultaneous WLAN and Bluetooth traffic. For these types of hardware, the 1463 * driver may request temporarily going into full power save, in order to 1464 * enable toggling the antenna between BT and WLAN. If the driver requests 1465 * disabling dynamic powersave, the @dynamic_ps_timeout value will be 1466 * temporarily set to zero until the driver re-enables dynamic powersave. 1467 * 1468 * Driver informs U-APSD client support by enabling 1469 * %IEEE80211_HW_SUPPORTS_UAPSD flag. The mode is configured through the 1470 * uapsd paramater in conf_tx() operation. Hardware needs to send the QoS 1471 * Nullfunc frames and stay awake until the service period has ended. To 1472 * utilize U-APSD, dynamic powersave is disabled for voip AC and all frames 1473 * from that AC are transmitted with powersave enabled. 1474 * 1475 * Note: U-APSD client mode is not yet supported with 1476 * %IEEE80211_HW_PS_NULLFUNC_STACK. 1477 */ 1478 1479 /** 1480 * DOC: Beacon filter support 1481 * 1482 * Some hardware have beacon filter support to reduce host cpu wakeups 1483 * which will reduce system power consumption. It usually works so that 1484 * the firmware creates a checksum of the beacon but omits all constantly 1485 * changing elements (TSF, TIM etc). Whenever the checksum changes the 1486 * beacon is forwarded to the host, otherwise it will be just dropped. That 1487 * way the host will only receive beacons where some relevant information 1488 * (for example ERP protection or WMM settings) have changed. 1489 * 1490 * Beacon filter support is advertised with the %IEEE80211_VIF_BEACON_FILTER 1491 * interface capability. The driver needs to enable beacon filter support 1492 * whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When 1493 * power save is enabled, the stack will not check for beacon loss and the 1494 * driver needs to notify about loss of beacons with ieee80211_beacon_loss(). 1495 * 1496 * The time (or number of beacons missed) until the firmware notifies the 1497 * driver of a beacon loss event (which in turn causes the driver to call 1498 * ieee80211_beacon_loss()) should be configurable and will be controlled 1499 * by mac80211 and the roaming algorithm in the future. 1500 * 1501 * Since there may be constantly changing information elements that nothing 1502 * in the software stack cares about, we will, in the future, have mac80211 1503 * tell the driver which information elements are interesting in the sense 1504 * that we want to see changes in them. This will include 1505 * - a list of information element IDs 1506 * - a list of OUIs for the vendor information element 1507 * 1508 * Ideally, the hardware would filter out any beacons without changes in the 1509 * requested elements, but if it cannot support that it may, at the expense 1510 * of some efficiency, filter out only a subset. For example, if the device 1511 * doesn't support checking for OUIs it should pass up all changes in all 1512 * vendor information elements. 1513 * 1514 * Note that change, for the sake of simplification, also includes information 1515 * elements appearing or disappearing from the beacon. 1516 * 1517 * Some hardware supports an "ignore list" instead, just make sure nothing 1518 * that was requested is on the ignore list, and include commonly changing 1519 * information element IDs in the ignore list, for example 11 (BSS load) and 1520 * the various vendor-assigned IEs with unknown contents (128, 129, 133-136, 1521 * 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility 1522 * it could also include some currently unused IDs. 1523 * 1524 * 1525 * In addition to these capabilities, hardware should support notifying the 1526 * host of changes in the beacon RSSI. This is relevant to implement roaming 1527 * when no traffic is flowing (when traffic is flowing we see the RSSI of 1528 * the received data packets). This can consist in notifying the host when 1529 * the RSSI changes significantly or when it drops below or rises above 1530 * configurable thresholds. In the future these thresholds will also be 1531 * configured by mac80211 (which gets them from userspace) to implement 1532 * them as the roaming algorithm requires. 1533 * 1534 * If the hardware cannot implement this, the driver should ask it to 1535 * periodically pass beacon frames to the host so that software can do the 1536 * signal strength threshold checking. 1537 */ 1538 1539 /** 1540 * DOC: Spatial multiplexing power save 1541 * 1542 * SMPS (Spatial multiplexing power save) is a mechanism to conserve 1543 * power in an 802.11n implementation. For details on the mechanism 1544 * and rationale, please refer to 802.11 (as amended by 802.11n-2009) 1545 * "11.2.3 SM power save". 1546 * 1547 * The mac80211 implementation is capable of sending action frames 1548 * to update the AP about the station's SMPS mode, and will instruct 1549 * the driver to enter the specific mode. It will also announce the 1550 * requested SMPS mode during the association handshake. Hardware 1551 * support for this feature is required, and can be indicated by 1552 * hardware flags. 1553 * 1554 * The default mode will be "automatic", which nl80211/cfg80211 1555 * defines to be dynamic SMPS in (regular) powersave, and SMPS 1556 * turned off otherwise. 1557 * 1558 * To support this feature, the driver must set the appropriate 1559 * hardware support flags, and handle the SMPS flag to the config() 1560 * operation. It will then with this mechanism be instructed to 1561 * enter the requested SMPS mode while associated to an HT AP. 1562 */ 1563 1564 /** 1565 * DOC: Frame filtering 1566 * 1567 * mac80211 requires to see many management frames for proper 1568 * operation, and users may want to see many more frames when 1569 * in monitor mode. However, for best CPU usage and power consumption, 1570 * having as few frames as possible percolate through the stack is 1571 * desirable. Hence, the hardware should filter as much as possible. 1572 * 1573 * To achieve this, mac80211 uses filter flags (see below) to tell 1574 * the driver's configure_filter() function which frames should be 1575 * passed to mac80211 and which should be filtered out. 1576 * 1577 * Before configure_filter() is invoked, the prepare_multicast() 1578 * callback is invoked with the parameters @mc_count and @mc_list 1579 * for the combined multicast address list of all virtual interfaces. 1580 * It's use is optional, and it returns a u64 that is passed to 1581 * configure_filter(). Additionally, configure_filter() has the 1582 * arguments @changed_flags telling which flags were changed and 1583 * @total_flags with the new flag states. 1584 * 1585 * If your device has no multicast address filters your driver will 1586 * need to check both the %FIF_ALLMULTI flag and the @mc_count 1587 * parameter to see whether multicast frames should be accepted 1588 * or dropped. 1589 * 1590 * All unsupported flags in @total_flags must be cleared. 1591 * Hardware does not support a flag if it is incapable of _passing_ 1592 * the frame to the stack. Otherwise the driver must ignore 1593 * the flag, but not clear it. 1594 * You must _only_ clear the flag (announce no support for the 1595 * flag to mac80211) if you are not able to pass the packet type 1596 * to the stack (so the hardware always filters it). 1597 * So for example, you should clear @FIF_CONTROL, if your hardware 1598 * always filters control frames. If your hardware always passes 1599 * control frames to the kernel and is incapable of filtering them, 1600 * you do _not_ clear the @FIF_CONTROL flag. 1601 * This rule applies to all other FIF flags as well. 1602 */ 1603 1604 /** 1605 * DOC: AP support for powersaving clients 1606 * 1607 * In order to implement AP and P2P GO modes, mac80211 has support for 1608 * client powersaving, both "legacy" PS (PS-Poll/null data) and uAPSD. 1609 * There currently is no support for sAPSD. 1610 * 1611 * There is one assumption that mac80211 makes, namely that a client 1612 * will not poll with PS-Poll and trigger with uAPSD at the same time. 1613 * Both are supported, and both can be used by the same client, but 1614 * they can't be used concurrently by the same client. This simplifies 1615 * the driver code. 1616 * 1617 * The first thing to keep in mind is that there is a flag for complete 1618 * driver implementation: %IEEE80211_HW_AP_LINK_PS. If this flag is set, 1619 * mac80211 expects the driver to handle most of the state machine for 1620 * powersaving clients and will ignore the PM bit in incoming frames. 1621 * Drivers then use ieee80211_sta_ps_transition() to inform mac80211 of 1622 * stations' powersave transitions. In this mode, mac80211 also doesn't 1623 * handle PS-Poll/uAPSD. 1624 * 1625 * In the mode without %IEEE80211_HW_AP_LINK_PS, mac80211 will check the 1626 * PM bit in incoming frames for client powersave transitions. When a 1627 * station goes to sleep, we will stop transmitting to it. There is, 1628 * however, a race condition: a station might go to sleep while there is 1629 * data buffered on hardware queues. If the device has support for this 1630 * it will reject frames, and the driver should give the frames back to 1631 * mac80211 with the %IEEE80211_TX_STAT_TX_FILTERED flag set which will 1632 * cause mac80211 to retry the frame when the station wakes up. The 1633 * driver is also notified of powersave transitions by calling its 1634 * @sta_notify callback. 1635 * 1636 * When the station is asleep, it has three choices: it can wake up, 1637 * it can PS-Poll, or it can possibly start a uAPSD service period. 1638 * Waking up is implemented by simply transmitting all buffered (and 1639 * filtered) frames to the station. This is the easiest case. When 1640 * the station sends a PS-Poll or a uAPSD trigger frame, mac80211 1641 * will inform the driver of this with the @allow_buffered_frames 1642 * callback; this callback is optional. mac80211 will then transmit 1643 * the frames as usual and set the %IEEE80211_TX_CTL_NO_PS_BUFFER 1644 * on each frame. The last frame in the service period (or the only 1645 * response to a PS-Poll) also has %IEEE80211_TX_STATUS_EOSP set to 1646 * indicate that it ends the service period; as this frame must have 1647 * TX status report it also sets %IEEE80211_TX_CTL_REQ_TX_STATUS. 1648 * When TX status is reported for this frame, the service period is 1649 * marked has having ended and a new one can be started by the peer. 1650 * 1651 * Additionally, non-bufferable MMPDUs can also be transmitted by 1652 * mac80211 with the %IEEE80211_TX_CTL_NO_PS_BUFFER set in them. 1653 * 1654 * Another race condition can happen on some devices like iwlwifi 1655 * when there are frames queued for the station and it wakes up 1656 * or polls; the frames that are already queued could end up being 1657 * transmitted first instead, causing reordering and/or wrong 1658 * processing of the EOSP. The cause is that allowing frames to be 1659 * transmitted to a certain station is out-of-band communication to 1660 * the device. To allow this problem to be solved, the driver can 1661 * call ieee80211_sta_block_awake() if frames are buffered when it 1662 * is notified that the station went to sleep. When all these frames 1663 * have been filtered (see above), it must call the function again 1664 * to indicate that the station is no longer blocked. 1665 * 1666 * If the driver buffers frames in the driver for aggregation in any 1667 * way, it must use the ieee80211_sta_set_buffered() call when it is 1668 * notified of the station going to sleep to inform mac80211 of any 1669 * TIDs that have frames buffered. Note that when a station wakes up 1670 * this information is reset (hence the requirement to call it when 1671 * informed of the station going to sleep). Then, when a service 1672 * period starts for any reason, @release_buffered_frames is called 1673 * with the number of frames to be released and which TIDs they are 1674 * to come from. In this case, the driver is responsible for setting 1675 * the EOSP (for uAPSD) and MORE_DATA bits in the released frames, 1676 * to help the @more_data paramter is passed to tell the driver if 1677 * there is more data on other TIDs -- the TIDs to release frames 1678 * from are ignored since mac80211 doesn't know how many frames the 1679 * buffers for those TIDs contain. 1680 * 1681 * If the driver also implement GO mode, where absence periods may 1682 * shorten service periods (or abort PS-Poll responses), it must 1683 * filter those response frames except in the case of frames that 1684 * are buffered in the driver -- those must remain buffered to avoid 1685 * reordering. Because it is possible that no frames are released 1686 * in this case, the driver must call ieee80211_sta_eosp_irqsafe() 1687 * to indicate to mac80211 that the service period ended anyway. 1688 * 1689 * Finally, if frames from multiple TIDs are released from mac80211 1690 * but the driver might reorder them, it must clear & set the flags 1691 * appropriately (only the last frame may have %IEEE80211_TX_STATUS_EOSP) 1692 * and also take care of the EOSP and MORE_DATA bits in the frame. 1693 * The driver may also use ieee80211_sta_eosp_irqsafe() in this case. 1694 */ 1695 1696 /** 1697 * enum ieee80211_filter_flags - hardware filter flags 1698 * 1699 * These flags determine what the filter in hardware should be 1700 * programmed to let through and what should not be passed to the 1701 * stack. It is always safe to pass more frames than requested, 1702 * but this has negative impact on power consumption. 1703 * 1704 * @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS, 1705 * think of the BSS as your network segment and then this corresponds 1706 * to the regular ethernet device promiscuous mode. 1707 * 1708 * @FIF_ALLMULTI: pass all multicast frames, this is used if requested 1709 * by the user or if the hardware is not capable of filtering by 1710 * multicast address. 1711 * 1712 * @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the 1713 * %RX_FLAG_FAILED_FCS_CRC for them) 1714 * 1715 * @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set 1716 * the %RX_FLAG_FAILED_PLCP_CRC for them 1717 * 1718 * @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate 1719 * to the hardware that it should not filter beacons or probe responses 1720 * by BSSID. Filtering them can greatly reduce the amount of processing 1721 * mac80211 needs to do and the amount of CPU wakeups, so you should 1722 * honour this flag if possible. 1723 * 1724 * @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS 1725 * is not set then only those addressed to this station. 1726 * 1727 * @FIF_OTHER_BSS: pass frames destined to other BSSes 1728 * 1729 * @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only 1730 * those addressed to this station. 1731 * 1732 * @FIF_PROBE_REQ: pass probe request frames 1733 */ 1734 enum ieee80211_filter_flags { 1735 FIF_PROMISC_IN_BSS = 1<<0, 1736 FIF_ALLMULTI = 1<<1, 1737 FIF_FCSFAIL = 1<<2, 1738 FIF_PLCPFAIL = 1<<3, 1739 FIF_BCN_PRBRESP_PROMISC = 1<<4, 1740 FIF_CONTROL = 1<<5, 1741 FIF_OTHER_BSS = 1<<6, 1742 FIF_PSPOLL = 1<<7, 1743 FIF_PROBE_REQ = 1<<8, 1744 }; 1745 1746 /** 1747 * enum ieee80211_ampdu_mlme_action - A-MPDU actions 1748 * 1749 * These flags are used with the ampdu_action() callback in 1750 * &struct ieee80211_ops to indicate which action is needed. 1751 * 1752 * Note that drivers MUST be able to deal with a TX aggregation 1753 * session being stopped even before they OK'ed starting it by 1754 * calling ieee80211_start_tx_ba_cb_irqsafe, because the peer 1755 * might receive the addBA frame and send a delBA right away! 1756 * 1757 * @IEEE80211_AMPDU_RX_START: start Rx aggregation 1758 * @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation 1759 * @IEEE80211_AMPDU_TX_START: start Tx aggregation 1760 * @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation 1761 * @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational 1762 */ 1763 enum ieee80211_ampdu_mlme_action { 1764 IEEE80211_AMPDU_RX_START, 1765 IEEE80211_AMPDU_RX_STOP, 1766 IEEE80211_AMPDU_TX_START, 1767 IEEE80211_AMPDU_TX_STOP, 1768 IEEE80211_AMPDU_TX_OPERATIONAL, 1769 }; 1770 1771 /** 1772 * enum ieee80211_frame_release_type - frame release reason 1773 * @IEEE80211_FRAME_RELEASE_PSPOLL: frame released for PS-Poll 1774 * @IEEE80211_FRAME_RELEASE_UAPSD: frame(s) released due to 1775 * frame received on trigger-enabled AC 1776 */ 1777 enum ieee80211_frame_release_type { 1778 IEEE80211_FRAME_RELEASE_PSPOLL, 1779 IEEE80211_FRAME_RELEASE_UAPSD, 1780 }; 1781 1782 /** 1783 * struct ieee80211_ops - callbacks from mac80211 to the driver 1784 * 1785 * This structure contains various callbacks that the driver may 1786 * handle or, in some cases, must handle, for example to configure 1787 * the hardware to a new channel or to transmit a frame. 1788 * 1789 * @tx: Handler that 802.11 module calls for each transmitted frame. 1790 * skb contains the buffer starting from the IEEE 802.11 header. 1791 * The low-level driver should send the frame out based on 1792 * configuration in the TX control data. This handler should, 1793 * preferably, never fail and stop queues appropriately. 1794 * This must be implemented if @tx_frags is not. 1795 * Must be atomic. 1796 * 1797 * @tx_frags: Called to transmit multiple fragments of a single MSDU. 1798 * This handler must consume all fragments, sending out some of 1799 * them only is useless and it can't ask for some of them to be 1800 * queued again. If the frame is not fragmented the queue has a 1801 * single SKB only. To avoid issues with the networking stack 1802 * when TX status is reported the frames should be removed from 1803 * the skb queue. 1804 * If this is used, the tx_info @vif and @sta pointers will be 1805 * invalid -- you must not use them in that case. 1806 * This must be implemented if @tx isn't. 1807 * Must be atomic. 1808 * 1809 * @start: Called before the first netdevice attached to the hardware 1810 * is enabled. This should turn on the hardware and must turn on 1811 * frame reception (for possibly enabled monitor interfaces.) 1812 * Returns negative error codes, these may be seen in userspace, 1813 * or zero. 1814 * When the device is started it should not have a MAC address 1815 * to avoid acknowledging frames before a non-monitor device 1816 * is added. 1817 * Must be implemented and can sleep. 1818 * 1819 * @stop: Called after last netdevice attached to the hardware 1820 * is disabled. This should turn off the hardware (at least 1821 * it must turn off frame reception.) 1822 * May be called right after add_interface if that rejects 1823 * an interface. If you added any work onto the mac80211 workqueue 1824 * you should ensure to cancel it on this callback. 1825 * Must be implemented and can sleep. 1826 * 1827 * @suspend: Suspend the device; mac80211 itself will quiesce before and 1828 * stop transmitting and doing any other configuration, and then 1829 * ask the device to suspend. This is only invoked when WoWLAN is 1830 * configured, otherwise the device is deconfigured completely and 1831 * reconfigured at resume time. 1832 * The driver may also impose special conditions under which it 1833 * wants to use the "normal" suspend (deconfigure), say if it only 1834 * supports WoWLAN when the device is associated. In this case, it 1835 * must return 1 from this function. 1836 * 1837 * @resume: If WoWLAN was configured, this indicates that mac80211 is 1838 * now resuming its operation, after this the device must be fully 1839 * functional again. If this returns an error, the only way out is 1840 * to also unregister the device. If it returns 1, then mac80211 1841 * will also go through the regular complete restart on resume. 1842 * 1843 * @add_interface: Called when a netdevice attached to the hardware is 1844 * enabled. Because it is not called for monitor mode devices, @start 1845 * and @stop must be implemented. 1846 * The driver should perform any initialization it needs before 1847 * the device can be enabled. The initial configuration for the 1848 * interface is given in the conf parameter. 1849 * The callback may refuse to add an interface by returning a 1850 * negative error code (which will be seen in userspace.) 1851 * Must be implemented and can sleep. 1852 * 1853 * @change_interface: Called when a netdevice changes type. This callback 1854 * is optional, but only if it is supported can interface types be 1855 * switched while the interface is UP. The callback may sleep. 1856 * Note that while an interface is being switched, it will not be 1857 * found by the interface iteration callbacks. 1858 * 1859 * @remove_interface: Notifies a driver that an interface is going down. 1860 * The @stop callback is called after this if it is the last interface 1861 * and no monitor interfaces are present. 1862 * When all interfaces are removed, the MAC address in the hardware 1863 * must be cleared so the device no longer acknowledges packets, 1864 * the mac_addr member of the conf structure is, however, set to the 1865 * MAC address of the device going away. 1866 * Hence, this callback must be implemented. It can sleep. 1867 * 1868 * @config: Handler for configuration requests. IEEE 802.11 code calls this 1869 * function to change hardware configuration, e.g., channel. 1870 * This function should never fail but returns a negative error code 1871 * if it does. The callback can sleep. 1872 * 1873 * @bss_info_changed: Handler for configuration requests related to BSS 1874 * parameters that may vary during BSS's lifespan, and may affect low 1875 * level driver (e.g. assoc/disassoc status, erp parameters). 1876 * This function should not be used if no BSS has been set, unless 1877 * for association indication. The @changed parameter indicates which 1878 * of the bss parameters has changed when a call is made. The callback 1879 * can sleep. 1880 * 1881 * @prepare_multicast: Prepare for multicast filter configuration. 1882 * This callback is optional, and its return value is passed 1883 * to configure_filter(). This callback must be atomic. 1884 * 1885 * @configure_filter: Configure the device's RX filter. 1886 * See the section "Frame filtering" for more information. 1887 * This callback must be implemented and can sleep. 1888 * 1889 * @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit 1890 * must be set or cleared for a given STA. Must be atomic. 1891 * 1892 * @set_key: See the section "Hardware crypto acceleration" 1893 * This callback is only called between add_interface and 1894 * remove_interface calls, i.e. while the given virtual interface 1895 * is enabled. 1896 * Returns a negative error code if the key can't be added. 1897 * The callback can sleep. 1898 * 1899 * @update_tkip_key: See the section "Hardware crypto acceleration" 1900 * This callback will be called in the context of Rx. Called for drivers 1901 * which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY. 1902 * The callback must be atomic. 1903 * 1904 * @set_rekey_data: If the device supports GTK rekeying, for example while the 1905 * host is suspended, it can assign this callback to retrieve the data 1906 * necessary to do GTK rekeying, this is the KEK, KCK and replay counter. 1907 * After rekeying was done it should (for example during resume) notify 1908 * userspace of the new replay counter using ieee80211_gtk_rekey_notify(). 1909 * 1910 * @hw_scan: Ask the hardware to service the scan request, no need to start 1911 * the scan state machine in stack. The scan must honour the channel 1912 * configuration done by the regulatory agent in the wiphy's 1913 * registered bands. The hardware (or the driver) needs to make sure 1914 * that power save is disabled. 1915 * The @req ie/ie_len members are rewritten by mac80211 to contain the 1916 * entire IEs after the SSID, so that drivers need not look at these 1917 * at all but just send them after the SSID -- mac80211 includes the 1918 * (extended) supported rates and HT information (where applicable). 1919 * When the scan finishes, ieee80211_scan_completed() must be called; 1920 * note that it also must be called when the scan cannot finish due to 1921 * any error unless this callback returned a negative error code. 1922 * The callback can sleep. 1923 * 1924 * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan. 1925 * The driver should ask the hardware to cancel the scan (if possible), 1926 * but the scan will be completed only after the driver will call 1927 * ieee80211_scan_completed(). 1928 * This callback is needed for wowlan, to prevent enqueueing a new 1929 * scan_work after the low-level driver was already suspended. 1930 * The callback can sleep. 1931 * 1932 * @sched_scan_start: Ask the hardware to start scanning repeatedly at 1933 * specific intervals. The driver must call the 1934 * ieee80211_sched_scan_results() function whenever it finds results. 1935 * This process will continue until sched_scan_stop is called. 1936 * 1937 * @sched_scan_stop: Tell the hardware to stop an ongoing scheduled scan. 1938 * 1939 * @sw_scan_start: Notifier function that is called just before a software scan 1940 * is started. Can be NULL, if the driver doesn't need this notification. 1941 * The callback can sleep. 1942 * 1943 * @sw_scan_complete: Notifier function that is called just after a 1944 * software scan finished. Can be NULL, if the driver doesn't need 1945 * this notification. 1946 * The callback can sleep. 1947 * 1948 * @get_stats: Return low-level statistics. 1949 * Returns zero if statistics are available. 1950 * The callback can sleep. 1951 * 1952 * @get_tkip_seq: If your device implements TKIP encryption in hardware this 1953 * callback should be provided to read the TKIP transmit IVs (both IV32 1954 * and IV16) for the given key from hardware. 1955 * The callback must be atomic. 1956 * 1957 * @set_frag_threshold: Configuration of fragmentation threshold. Assign this 1958 * if the device does fragmentation by itself; if this callback is 1959 * implemented then the stack will not do fragmentation. 1960 * The callback can sleep. 1961 * 1962 * @set_rts_threshold: Configuration of RTS threshold (if device needs it) 1963 * The callback can sleep. 1964 * 1965 * @sta_add: Notifies low level driver about addition of an associated station, 1966 * AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1967 * 1968 * @sta_remove: Notifies low level driver about removal of an associated 1969 * station, AP, IBSS/WDS/mesh peer etc. This callback can sleep. 1970 * 1971 * @sta_notify: Notifies low level driver about power state transition of an 1972 * associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating 1973 * in AP mode, this callback will not be called when the flag 1974 * %IEEE80211_HW_AP_LINK_PS is set. Must be atomic. 1975 * 1976 * @sta_state: Notifies low level driver about state transition of a 1977 * station (which can be the AP, a client, IBSS/WDS/mesh peer etc.) 1978 * This callback is mutually exclusive with @sta_add/@sta_remove. 1979 * It must not fail for down transitions but may fail for transitions 1980 * up the list of states. 1981 * The callback can sleep. 1982 * 1983 * @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max), 1984 * bursting) for a hardware TX queue. 1985 * Returns a negative error code on failure. 1986 * The callback can sleep. 1987 * 1988 * @get_tsf: Get the current TSF timer value from firmware/hardware. Currently, 1989 * this is only used for IBSS mode BSSID merging and debugging. Is not a 1990 * required function. 1991 * The callback can sleep. 1992 * 1993 * @set_tsf: Set the TSF timer to the specified value in the firmware/hardware. 1994 * Currently, this is only used for IBSS mode debugging. Is not a 1995 * required function. 1996 * The callback can sleep. 1997 * 1998 * @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize 1999 * with other STAs in the IBSS. This is only used in IBSS mode. This 2000 * function is optional if the firmware/hardware takes full care of 2001 * TSF synchronization. 2002 * The callback can sleep. 2003 * 2004 * @tx_last_beacon: Determine whether the last IBSS beacon was sent by us. 2005 * This is needed only for IBSS mode and the result of this function is 2006 * used to determine whether to reply to Probe Requests. 2007 * Returns non-zero if this device sent the last beacon. 2008 * The callback can sleep. 2009 * 2010 * @ampdu_action: Perform a certain A-MPDU action 2011 * The RA/TID combination determines the destination and TID we want 2012 * the ampdu action to be performed for. The action is defined through 2013 * ieee80211_ampdu_mlme_action. Starting sequence number (@ssn) 2014 * is the first frame we expect to perform the action on. Notice 2015 * that TX/RX_STOP can pass NULL for this parameter. 2016 * The @buf_size parameter is only valid when the action is set to 2017 * %IEEE80211_AMPDU_TX_OPERATIONAL and indicates the peer's reorder 2018 * buffer size (number of subframes) for this session -- the driver 2019 * may neither send aggregates containing more subframes than this 2020 * nor send aggregates in a way that lost frames would exceed the 2021 * buffer size. If just limiting the aggregate size, this would be 2022 * possible with a buf_size of 8: 2023 * - TX: 1.....7 2024 * - RX: 2....7 (lost frame #1) 2025 * - TX: 8..1... 2026 * which is invalid since #1 was now re-transmitted well past the 2027 * buffer size of 8. Correct ways to retransmit #1 would be: 2028 * - TX: 1 or 18 or 81 2029 * Even "189" would be wrong since 1 could be lost again. 2030 * 2031 * Returns a negative error code on failure. 2032 * The callback can sleep. 2033 * 2034 * @get_survey: Return per-channel survey information 2035 * 2036 * @rfkill_poll: Poll rfkill hardware state. If you need this, you also 2037 * need to set wiphy->rfkill_poll to %true before registration, 2038 * and need to call wiphy_rfkill_set_hw_state() in the callback. 2039 * The callback can sleep. 2040 * 2041 * @set_coverage_class: Set slot time for given coverage class as specified 2042 * in IEEE 802.11-2007 section 17.3.8.6 and modify ACK timeout 2043 * accordingly. This callback is not required and may sleep. 2044 * 2045 * @testmode_cmd: Implement a cfg80211 test mode command. 2046 * The callback can sleep. 2047 * @testmode_dump: Implement a cfg80211 test mode dump. The callback can sleep. 2048 * 2049 * @flush: Flush all pending frames from the hardware queue, making sure 2050 * that the hardware queues are empty. If the parameter @drop is set 2051 * to %true, pending frames may be dropped. The callback can sleep. 2052 * 2053 * @channel_switch: Drivers that need (or want) to offload the channel 2054 * switch operation for CSAs received from the AP may implement this 2055 * callback. They must then call ieee80211_chswitch_done() to indicate 2056 * completion of the channel switch. 2057 * 2058 * @napi_poll: Poll Rx queue for incoming data frames. 2059 * 2060 * @set_antenna: Set antenna configuration (tx_ant, rx_ant) on the device. 2061 * Parameters are bitmaps of allowed antennas to use for TX/RX. Drivers may 2062 * reject TX/RX mask combinations they cannot support by returning -EINVAL 2063 * (also see nl80211.h @NL80211_ATTR_WIPHY_ANTENNA_TX). 2064 * 2065 * @get_antenna: Get current antenna configuration from device (tx_ant, rx_ant). 2066 * 2067 * @remain_on_channel: Starts an off-channel period on the given channel, must 2068 * call back to ieee80211_ready_on_channel() when on that channel. Note 2069 * that normal channel traffic is not stopped as this is intended for hw 2070 * offload. Frames to transmit on the off-channel channel are transmitted 2071 * normally except for the %IEEE80211_TX_CTL_TX_OFFCHAN flag. When the 2072 * duration (which will always be non-zero) expires, the driver must call 2073 * ieee80211_remain_on_channel_expired(). This callback may sleep. 2074 * @cancel_remain_on_channel: Requests that an ongoing off-channel period is 2075 * aborted before it expires. This callback may sleep. 2076 * 2077 * @set_ringparam: Set tx and rx ring sizes. 2078 * 2079 * @get_ringparam: Get tx and rx ring current and maximum sizes. 2080 * 2081 * @tx_frames_pending: Check if there is any pending frame in the hardware 2082 * queues before entering power save. 2083 * 2084 * @set_bitrate_mask: Set a mask of rates to be used for rate control selection 2085 * when transmitting a frame. Currently only legacy rates are handled. 2086 * The callback can sleep. 2087 * @rssi_callback: Notify driver when the average RSSI goes above/below 2088 * thresholds that were registered previously. The callback can sleep. 2089 * 2090 * @release_buffered_frames: Release buffered frames according to the given 2091 * parameters. In the case where the driver buffers some frames for 2092 * sleeping stations mac80211 will use this callback to tell the driver 2093 * to release some frames, either for PS-poll or uAPSD. 2094 * Note that if the @more_data paramter is %false the driver must check 2095 * if there are more frames on the given TIDs, and if there are more than 2096 * the frames being released then it must still set the more-data bit in 2097 * the frame. If the @more_data parameter is %true, then of course the 2098 * more-data bit must always be set. 2099 * The @tids parameter tells the driver which TIDs to release frames 2100 * from, for PS-poll it will always have only a single bit set. 2101 * In the case this is used for a PS-poll initiated release, the 2102 * @num_frames parameter will always be 1 so code can be shared. In 2103 * this case the driver must also set %IEEE80211_TX_STATUS_EOSP flag 2104 * on the TX status (and must report TX status) so that the PS-poll 2105 * period is properly ended. This is used to avoid sending multiple 2106 * responses for a retried PS-poll frame. 2107 * In the case this is used for uAPSD, the @num_frames parameter may be 2108 * bigger than one, but the driver may send fewer frames (it must send 2109 * at least one, however). In this case it is also responsible for 2110 * setting the EOSP flag in the QoS header of the frames. Also, when the 2111 * service period ends, the driver must set %IEEE80211_TX_STATUS_EOSP 2112 * on the last frame in the SP. Alternatively, it may call the function 2113 * ieee80211_sta_eosp_irqsafe() to inform mac80211 of the end of the SP. 2114 * This callback must be atomic. 2115 * @allow_buffered_frames: Prepare device to allow the given number of frames 2116 * to go out to the given station. The frames will be sent by mac80211 2117 * via the usual TX path after this call. The TX information for frames 2118 * released will also have the %IEEE80211_TX_CTL_NO_PS_BUFFER flag set 2119 * and the last one will also have %IEEE80211_TX_STATUS_EOSP set. In case 2120 * frames from multiple TIDs are released and the driver might reorder 2121 * them between the TIDs, it must set the %IEEE80211_TX_STATUS_EOSP flag 2122 * on the last frame and clear it on all others and also handle the EOSP 2123 * bit in the QoS header correctly. Alternatively, it can also call the 2124 * ieee80211_sta_eosp_irqsafe() function. 2125 * The @tids parameter is a bitmap and tells the driver which TIDs the 2126 * frames will be on; it will at most have two bits set. 2127 * This callback must be atomic. 2128 */ 2129 struct ieee80211_ops { 2130 void (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb); 2131 void (*tx_frags)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2132 struct ieee80211_sta *sta, struct sk_buff_head *skbs); 2133 int (*start)(struct ieee80211_hw *hw); 2134 void (*stop)(struct ieee80211_hw *hw); 2135 #ifdef CONFIG_PM 2136 int (*suspend)(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan); 2137 int (*resume)(struct ieee80211_hw *hw); 2138 #endif 2139 int (*add_interface)(struct ieee80211_hw *hw, 2140 struct ieee80211_vif *vif); 2141 int (*change_interface)(struct ieee80211_hw *hw, 2142 struct ieee80211_vif *vif, 2143 enum nl80211_iftype new_type, bool p2p); 2144 void (*remove_interface)(struct ieee80211_hw *hw, 2145 struct ieee80211_vif *vif); 2146 int (*config)(struct ieee80211_hw *hw, u32 changed); 2147 void (*bss_info_changed)(struct ieee80211_hw *hw, 2148 struct ieee80211_vif *vif, 2149 struct ieee80211_bss_conf *info, 2150 u32 changed); 2151 2152 u64 (*prepare_multicast)(struct ieee80211_hw *hw, 2153 struct netdev_hw_addr_list *mc_list); 2154 void (*configure_filter)(struct ieee80211_hw *hw, 2155 unsigned int changed_flags, 2156 unsigned int *total_flags, 2157 u64 multicast); 2158 int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta, 2159 bool set); 2160 int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd, 2161 struct ieee80211_vif *vif, struct ieee80211_sta *sta, 2162 struct ieee80211_key_conf *key); 2163 void (*update_tkip_key)(struct ieee80211_hw *hw, 2164 struct ieee80211_vif *vif, 2165 struct ieee80211_key_conf *conf, 2166 struct ieee80211_sta *sta, 2167 u32 iv32, u16 *phase1key); 2168 void (*set_rekey_data)(struct ieee80211_hw *hw, 2169 struct ieee80211_vif *vif, 2170 struct cfg80211_gtk_rekey_data *data); 2171 int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2172 struct cfg80211_scan_request *req); 2173 void (*cancel_hw_scan)(struct ieee80211_hw *hw, 2174 struct ieee80211_vif *vif); 2175 int (*sched_scan_start)(struct ieee80211_hw *hw, 2176 struct ieee80211_vif *vif, 2177 struct cfg80211_sched_scan_request *req, 2178 struct ieee80211_sched_scan_ies *ies); 2179 void (*sched_scan_stop)(struct ieee80211_hw *hw, 2180 struct ieee80211_vif *vif); 2181 void (*sw_scan_start)(struct ieee80211_hw *hw); 2182 void (*sw_scan_complete)(struct ieee80211_hw *hw); 2183 int (*get_stats)(struct ieee80211_hw *hw, 2184 struct ieee80211_low_level_stats *stats); 2185 void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx, 2186 u32 *iv32, u16 *iv16); 2187 int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value); 2188 int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value); 2189 int (*sta_add)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2190 struct ieee80211_sta *sta); 2191 int (*sta_remove)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2192 struct ieee80211_sta *sta); 2193 void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2194 enum sta_notify_cmd, struct ieee80211_sta *sta); 2195 int (*sta_state)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2196 struct ieee80211_sta *sta, 2197 enum ieee80211_sta_state old_state, 2198 enum ieee80211_sta_state new_state); 2199 int (*conf_tx)(struct ieee80211_hw *hw, 2200 struct ieee80211_vif *vif, u16 queue, 2201 const struct ieee80211_tx_queue_params *params); 2202 u64 (*get_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2203 void (*set_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2204 u64 tsf); 2205 void (*reset_tsf)(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2206 int (*tx_last_beacon)(struct ieee80211_hw *hw); 2207 int (*ampdu_action)(struct ieee80211_hw *hw, 2208 struct ieee80211_vif *vif, 2209 enum ieee80211_ampdu_mlme_action action, 2210 struct ieee80211_sta *sta, u16 tid, u16 *ssn, 2211 u8 buf_size); 2212 int (*get_survey)(struct ieee80211_hw *hw, int idx, 2213 struct survey_info *survey); 2214 void (*rfkill_poll)(struct ieee80211_hw *hw); 2215 void (*set_coverage_class)(struct ieee80211_hw *hw, u8 coverage_class); 2216 #ifdef CONFIG_NL80211_TESTMODE 2217 int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len); 2218 int (*testmode_dump)(struct ieee80211_hw *hw, struct sk_buff *skb, 2219 struct netlink_callback *cb, 2220 void *data, int len); 2221 #endif 2222 void (*flush)(struct ieee80211_hw *hw, bool drop); 2223 void (*channel_switch)(struct ieee80211_hw *hw, 2224 struct ieee80211_channel_switch *ch_switch); 2225 int (*napi_poll)(struct ieee80211_hw *hw, int budget); 2226 int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant); 2227 int (*get_antenna)(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant); 2228 2229 int (*remain_on_channel)(struct ieee80211_hw *hw, 2230 struct ieee80211_channel *chan, 2231 enum nl80211_channel_type channel_type, 2232 int duration); 2233 int (*cancel_remain_on_channel)(struct ieee80211_hw *hw); 2234 int (*set_ringparam)(struct ieee80211_hw *hw, u32 tx, u32 rx); 2235 void (*get_ringparam)(struct ieee80211_hw *hw, 2236 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max); 2237 bool (*tx_frames_pending)(struct ieee80211_hw *hw); 2238 int (*set_bitrate_mask)(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2239 const struct cfg80211_bitrate_mask *mask); 2240 void (*rssi_callback)(struct ieee80211_hw *hw, 2241 enum ieee80211_rssi_event rssi_event); 2242 2243 void (*allow_buffered_frames)(struct ieee80211_hw *hw, 2244 struct ieee80211_sta *sta, 2245 u16 tids, int num_frames, 2246 enum ieee80211_frame_release_type reason, 2247 bool more_data); 2248 void (*release_buffered_frames)(struct ieee80211_hw *hw, 2249 struct ieee80211_sta *sta, 2250 u16 tids, int num_frames, 2251 enum ieee80211_frame_release_type reason, 2252 bool more_data); 2253 }; 2254 2255 /** 2256 * ieee80211_alloc_hw - Allocate a new hardware device 2257 * 2258 * This must be called once for each hardware device. The returned pointer 2259 * must be used to refer to this device when calling other functions. 2260 * mac80211 allocates a private data area for the driver pointed to by 2261 * @priv in &struct ieee80211_hw, the size of this area is given as 2262 * @priv_data_len. 2263 * 2264 * @priv_data_len: length of private data 2265 * @ops: callbacks for this device 2266 */ 2267 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 2268 const struct ieee80211_ops *ops); 2269 2270 /** 2271 * ieee80211_register_hw - Register hardware device 2272 * 2273 * You must call this function before any other functions in 2274 * mac80211. Note that before a hardware can be registered, you 2275 * need to fill the contained wiphy's information. 2276 * 2277 * @hw: the device to register as returned by ieee80211_alloc_hw() 2278 */ 2279 int ieee80211_register_hw(struct ieee80211_hw *hw); 2280 2281 /** 2282 * struct ieee80211_tpt_blink - throughput blink description 2283 * @throughput: throughput in Kbit/sec 2284 * @blink_time: blink time in milliseconds 2285 * (full cycle, ie. one off + one on period) 2286 */ 2287 struct ieee80211_tpt_blink { 2288 int throughput; 2289 int blink_time; 2290 }; 2291 2292 /** 2293 * enum ieee80211_tpt_led_trigger_flags - throughput trigger flags 2294 * @IEEE80211_TPT_LEDTRIG_FL_RADIO: enable blinking with radio 2295 * @IEEE80211_TPT_LEDTRIG_FL_WORK: enable blinking when working 2296 * @IEEE80211_TPT_LEDTRIG_FL_CONNECTED: enable blinking when at least one 2297 * interface is connected in some way, including being an AP 2298 */ 2299 enum ieee80211_tpt_led_trigger_flags { 2300 IEEE80211_TPT_LEDTRIG_FL_RADIO = BIT(0), 2301 IEEE80211_TPT_LEDTRIG_FL_WORK = BIT(1), 2302 IEEE80211_TPT_LEDTRIG_FL_CONNECTED = BIT(2), 2303 }; 2304 2305 #ifdef CONFIG_MAC80211_LEDS 2306 extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw); 2307 extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw); 2308 extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw); 2309 extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw); 2310 extern char *__ieee80211_create_tpt_led_trigger( 2311 struct ieee80211_hw *hw, unsigned int flags, 2312 const struct ieee80211_tpt_blink *blink_table, 2313 unsigned int blink_table_len); 2314 #endif 2315 /** 2316 * ieee80211_get_tx_led_name - get name of TX LED 2317 * 2318 * mac80211 creates a transmit LED trigger for each wireless hardware 2319 * that can be used to drive LEDs if your driver registers a LED device. 2320 * This function returns the name (or %NULL if not configured for LEDs) 2321 * of the trigger so you can automatically link the LED device. 2322 * 2323 * @hw: the hardware to get the LED trigger name for 2324 */ 2325 static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw) 2326 { 2327 #ifdef CONFIG_MAC80211_LEDS 2328 return __ieee80211_get_tx_led_name(hw); 2329 #else 2330 return NULL; 2331 #endif 2332 } 2333 2334 /** 2335 * ieee80211_get_rx_led_name - get name of RX LED 2336 * 2337 * mac80211 creates a receive LED trigger for each wireless hardware 2338 * that can be used to drive LEDs if your driver registers a LED device. 2339 * This function returns the name (or %NULL if not configured for LEDs) 2340 * of the trigger so you can automatically link the LED device. 2341 * 2342 * @hw: the hardware to get the LED trigger name for 2343 */ 2344 static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw) 2345 { 2346 #ifdef CONFIG_MAC80211_LEDS 2347 return __ieee80211_get_rx_led_name(hw); 2348 #else 2349 return NULL; 2350 #endif 2351 } 2352 2353 /** 2354 * ieee80211_get_assoc_led_name - get name of association LED 2355 * 2356 * mac80211 creates a association LED trigger for each wireless hardware 2357 * that can be used to drive LEDs if your driver registers a LED device. 2358 * This function returns the name (or %NULL if not configured for LEDs) 2359 * of the trigger so you can automatically link the LED device. 2360 * 2361 * @hw: the hardware to get the LED trigger name for 2362 */ 2363 static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw) 2364 { 2365 #ifdef CONFIG_MAC80211_LEDS 2366 return __ieee80211_get_assoc_led_name(hw); 2367 #else 2368 return NULL; 2369 #endif 2370 } 2371 2372 /** 2373 * ieee80211_get_radio_led_name - get name of radio LED 2374 * 2375 * mac80211 creates a radio change LED trigger for each wireless hardware 2376 * that can be used to drive LEDs if your driver registers a LED device. 2377 * This function returns the name (or %NULL if not configured for LEDs) 2378 * of the trigger so you can automatically link the LED device. 2379 * 2380 * @hw: the hardware to get the LED trigger name for 2381 */ 2382 static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw) 2383 { 2384 #ifdef CONFIG_MAC80211_LEDS 2385 return __ieee80211_get_radio_led_name(hw); 2386 #else 2387 return NULL; 2388 #endif 2389 } 2390 2391 /** 2392 * ieee80211_create_tpt_led_trigger - create throughput LED trigger 2393 * @hw: the hardware to create the trigger for 2394 * @flags: trigger flags, see &enum ieee80211_tpt_led_trigger_flags 2395 * @blink_table: the blink table -- needs to be ordered by throughput 2396 * @blink_table_len: size of the blink table 2397 * 2398 * This function returns %NULL (in case of error, or if no LED 2399 * triggers are configured) or the name of the new trigger. 2400 * This function must be called before ieee80211_register_hw(). 2401 */ 2402 static inline char * 2403 ieee80211_create_tpt_led_trigger(struct ieee80211_hw *hw, unsigned int flags, 2404 const struct ieee80211_tpt_blink *blink_table, 2405 unsigned int blink_table_len) 2406 { 2407 #ifdef CONFIG_MAC80211_LEDS 2408 return __ieee80211_create_tpt_led_trigger(hw, flags, blink_table, 2409 blink_table_len); 2410 #else 2411 return NULL; 2412 #endif 2413 } 2414 2415 /** 2416 * ieee80211_unregister_hw - Unregister a hardware device 2417 * 2418 * This function instructs mac80211 to free allocated resources 2419 * and unregister netdevices from the networking subsystem. 2420 * 2421 * @hw: the hardware to unregister 2422 */ 2423 void ieee80211_unregister_hw(struct ieee80211_hw *hw); 2424 2425 /** 2426 * ieee80211_free_hw - free hardware descriptor 2427 * 2428 * This function frees everything that was allocated, including the 2429 * private data for the driver. You must call ieee80211_unregister_hw() 2430 * before calling this function. 2431 * 2432 * @hw: the hardware to free 2433 */ 2434 void ieee80211_free_hw(struct ieee80211_hw *hw); 2435 2436 /** 2437 * ieee80211_restart_hw - restart hardware completely 2438 * 2439 * Call this function when the hardware was restarted for some reason 2440 * (hardware error, ...) and the driver is unable to restore its state 2441 * by itself. mac80211 assumes that at this point the driver/hardware 2442 * is completely uninitialised and stopped, it starts the process by 2443 * calling the ->start() operation. The driver will need to reset all 2444 * internal state that it has prior to calling this function. 2445 * 2446 * @hw: the hardware to restart 2447 */ 2448 void ieee80211_restart_hw(struct ieee80211_hw *hw); 2449 2450 /** ieee80211_napi_schedule - schedule NAPI poll 2451 * 2452 * Use this function to schedule NAPI polling on a device. 2453 * 2454 * @hw: the hardware to start polling 2455 */ 2456 void ieee80211_napi_schedule(struct ieee80211_hw *hw); 2457 2458 /** ieee80211_napi_complete - complete NAPI polling 2459 * 2460 * Use this function to finish NAPI polling on a device. 2461 * 2462 * @hw: the hardware to stop polling 2463 */ 2464 void ieee80211_napi_complete(struct ieee80211_hw *hw); 2465 2466 /** 2467 * ieee80211_rx - receive frame 2468 * 2469 * Use this function to hand received frames to mac80211. The receive 2470 * buffer in @skb must start with an IEEE 802.11 header. In case of a 2471 * paged @skb is used, the driver is recommended to put the ieee80211 2472 * header of the frame on the linear part of the @skb to avoid memory 2473 * allocation and/or memcpy by the stack. 2474 * 2475 * This function may not be called in IRQ context. Calls to this function 2476 * for a single hardware must be synchronized against each other. Calls to 2477 * this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be 2478 * mixed for a single hardware. 2479 * 2480 * In process context use instead ieee80211_rx_ni(). 2481 * 2482 * @hw: the hardware this frame came in on 2483 * @skb: the buffer to receive, owned by mac80211 after this call 2484 */ 2485 void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb); 2486 2487 /** 2488 * ieee80211_rx_irqsafe - receive frame 2489 * 2490 * Like ieee80211_rx() but can be called in IRQ context 2491 * (internally defers to a tasklet.) 2492 * 2493 * Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not 2494 * be mixed for a single hardware. 2495 * 2496 * @hw: the hardware this frame came in on 2497 * @skb: the buffer to receive, owned by mac80211 after this call 2498 */ 2499 void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb); 2500 2501 /** 2502 * ieee80211_rx_ni - receive frame (in process context) 2503 * 2504 * Like ieee80211_rx() but can be called in process context 2505 * (internally disables bottom halves). 2506 * 2507 * Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may 2508 * not be mixed for a single hardware. 2509 * 2510 * @hw: the hardware this frame came in on 2511 * @skb: the buffer to receive, owned by mac80211 after this call 2512 */ 2513 static inline void ieee80211_rx_ni(struct ieee80211_hw *hw, 2514 struct sk_buff *skb) 2515 { 2516 local_bh_disable(); 2517 ieee80211_rx(hw, skb); 2518 local_bh_enable(); 2519 } 2520 2521 /** 2522 * ieee80211_sta_ps_transition - PS transition for connected sta 2523 * 2524 * When operating in AP mode with the %IEEE80211_HW_AP_LINK_PS 2525 * flag set, use this function to inform mac80211 about a connected station 2526 * entering/leaving PS mode. 2527 * 2528 * This function may not be called in IRQ context or with softirqs enabled. 2529 * 2530 * Calls to this function for a single hardware must be synchronized against 2531 * each other. 2532 * 2533 * The function returns -EINVAL when the requested PS mode is already set. 2534 * 2535 * @sta: currently connected sta 2536 * @start: start or stop PS 2537 */ 2538 int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start); 2539 2540 /** 2541 * ieee80211_sta_ps_transition_ni - PS transition for connected sta 2542 * (in process context) 2543 * 2544 * Like ieee80211_sta_ps_transition() but can be called in process context 2545 * (internally disables bottom halves). Concurrent call restriction still 2546 * applies. 2547 * 2548 * @sta: currently connected sta 2549 * @start: start or stop PS 2550 */ 2551 static inline int ieee80211_sta_ps_transition_ni(struct ieee80211_sta *sta, 2552 bool start) 2553 { 2554 int ret; 2555 2556 local_bh_disable(); 2557 ret = ieee80211_sta_ps_transition(sta, start); 2558 local_bh_enable(); 2559 2560 return ret; 2561 } 2562 2563 /* 2564 * The TX headroom reserved by mac80211 for its own tx_status functions. 2565 * This is enough for the radiotap header. 2566 */ 2567 #define IEEE80211_TX_STATUS_HEADROOM 14 2568 2569 /** 2570 * ieee80211_sta_set_buffered - inform mac80211 about driver-buffered frames 2571 * @sta: &struct ieee80211_sta pointer for the sleeping station 2572 * @tid: the TID that has buffered frames 2573 * @buffered: indicates whether or not frames are buffered for this TID 2574 * 2575 * If a driver buffers frames for a powersave station instead of passing 2576 * them back to mac80211 for retransmission, the station may still need 2577 * to be told that there are buffered frames via the TIM bit. 2578 * 2579 * This function informs mac80211 whether or not there are frames that are 2580 * buffered in the driver for a given TID; mac80211 can then use this data 2581 * to set the TIM bit (NOTE: This may call back into the driver's set_tim 2582 * call! Beware of the locking!) 2583 * 2584 * If all frames are released to the station (due to PS-poll or uAPSD) 2585 * then the driver needs to inform mac80211 that there no longer are 2586 * frames buffered. However, when the station wakes up mac80211 assumes 2587 * that all buffered frames will be transmitted and clears this data, 2588 * drivers need to make sure they inform mac80211 about all buffered 2589 * frames on the sleep transition (sta_notify() with %STA_NOTIFY_SLEEP). 2590 * 2591 * Note that technically mac80211 only needs to know this per AC, not per 2592 * TID, but since driver buffering will inevitably happen per TID (since 2593 * it is related to aggregation) it is easier to make mac80211 map the 2594 * TID to the AC as required instead of keeping track in all drivers that 2595 * use this API. 2596 */ 2597 void ieee80211_sta_set_buffered(struct ieee80211_sta *sta, 2598 u8 tid, bool buffered); 2599 2600 /** 2601 * ieee80211_tx_status - transmit status callback 2602 * 2603 * Call this function for all transmitted frames after they have been 2604 * transmitted. It is permissible to not call this function for 2605 * multicast frames but this can affect statistics. 2606 * 2607 * This function may not be called in IRQ context. Calls to this function 2608 * for a single hardware must be synchronized against each other. Calls 2609 * to this function, ieee80211_tx_status_ni() and ieee80211_tx_status_irqsafe() 2610 * may not be mixed for a single hardware. 2611 * 2612 * @hw: the hardware the frame was transmitted by 2613 * @skb: the frame that was transmitted, owned by mac80211 after this call 2614 */ 2615 void ieee80211_tx_status(struct ieee80211_hw *hw, 2616 struct sk_buff *skb); 2617 2618 /** 2619 * ieee80211_tx_status_ni - transmit status callback (in process context) 2620 * 2621 * Like ieee80211_tx_status() but can be called in process context. 2622 * 2623 * Calls to this function, ieee80211_tx_status() and 2624 * ieee80211_tx_status_irqsafe() may not be mixed 2625 * for a single hardware. 2626 * 2627 * @hw: the hardware the frame was transmitted by 2628 * @skb: the frame that was transmitted, owned by mac80211 after this call 2629 */ 2630 static inline void ieee80211_tx_status_ni(struct ieee80211_hw *hw, 2631 struct sk_buff *skb) 2632 { 2633 local_bh_disable(); 2634 ieee80211_tx_status(hw, skb); 2635 local_bh_enable(); 2636 } 2637 2638 /** 2639 * ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback 2640 * 2641 * Like ieee80211_tx_status() but can be called in IRQ context 2642 * (internally defers to a tasklet.) 2643 * 2644 * Calls to this function, ieee80211_tx_status() and 2645 * ieee80211_tx_status_ni() may not be mixed for a single hardware. 2646 * 2647 * @hw: the hardware the frame was transmitted by 2648 * @skb: the frame that was transmitted, owned by mac80211 after this call 2649 */ 2650 void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw, 2651 struct sk_buff *skb); 2652 2653 /** 2654 * ieee80211_report_low_ack - report non-responding station 2655 * 2656 * When operating in AP-mode, call this function to report a non-responding 2657 * connected STA. 2658 * 2659 * @sta: the non-responding connected sta 2660 * @num_packets: number of packets sent to @sta without a response 2661 */ 2662 void ieee80211_report_low_ack(struct ieee80211_sta *sta, u32 num_packets); 2663 2664 /** 2665 * ieee80211_beacon_get_tim - beacon generation function 2666 * @hw: pointer obtained from ieee80211_alloc_hw(). 2667 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2668 * @tim_offset: pointer to variable that will receive the TIM IE offset. 2669 * Set to 0 if invalid (in non-AP modes). 2670 * @tim_length: pointer to variable that will receive the TIM IE length, 2671 * (including the ID and length bytes!). 2672 * Set to 0 if invalid (in non-AP modes). 2673 * 2674 * If the driver implements beaconing modes, it must use this function to 2675 * obtain the beacon frame/template. 2676 * 2677 * If the beacon frames are generated by the host system (i.e., not in 2678 * hardware/firmware), the driver uses this function to get each beacon 2679 * frame from mac80211 -- it is responsible for calling this function 2680 * before the beacon is needed (e.g. based on hardware interrupt). 2681 * 2682 * If the beacon frames are generated by the device, then the driver 2683 * must use the returned beacon as the template and change the TIM IE 2684 * according to the current DTIM parameters/TIM bitmap. 2685 * 2686 * The driver is responsible for freeing the returned skb. 2687 */ 2688 struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw, 2689 struct ieee80211_vif *vif, 2690 u16 *tim_offset, u16 *tim_length); 2691 2692 /** 2693 * ieee80211_beacon_get - beacon generation function 2694 * @hw: pointer obtained from ieee80211_alloc_hw(). 2695 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2696 * 2697 * See ieee80211_beacon_get_tim(). 2698 */ 2699 static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw, 2700 struct ieee80211_vif *vif) 2701 { 2702 return ieee80211_beacon_get_tim(hw, vif, NULL, NULL); 2703 } 2704 2705 /** 2706 * ieee80211_proberesp_get - retrieve a Probe Response template 2707 * @hw: pointer obtained from ieee80211_alloc_hw(). 2708 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2709 * 2710 * Creates a Probe Response template which can, for example, be uploaded to 2711 * hardware. The destination address should be set by the caller. 2712 * 2713 * Can only be called in AP mode. 2714 */ 2715 struct sk_buff *ieee80211_proberesp_get(struct ieee80211_hw *hw, 2716 struct ieee80211_vif *vif); 2717 2718 /** 2719 * ieee80211_pspoll_get - retrieve a PS Poll template 2720 * @hw: pointer obtained from ieee80211_alloc_hw(). 2721 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2722 * 2723 * Creates a PS Poll a template which can, for example, uploaded to 2724 * hardware. The template must be updated after association so that correct 2725 * AID, BSSID and MAC address is used. 2726 * 2727 * Note: Caller (or hardware) is responsible for setting the 2728 * &IEEE80211_FCTL_PM bit. 2729 */ 2730 struct sk_buff *ieee80211_pspoll_get(struct ieee80211_hw *hw, 2731 struct ieee80211_vif *vif); 2732 2733 /** 2734 * ieee80211_nullfunc_get - retrieve a nullfunc template 2735 * @hw: pointer obtained from ieee80211_alloc_hw(). 2736 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2737 * 2738 * Creates a Nullfunc template which can, for example, uploaded to 2739 * hardware. The template must be updated after association so that correct 2740 * BSSID and address is used. 2741 * 2742 * Note: Caller (or hardware) is responsible for setting the 2743 * &IEEE80211_FCTL_PM bit as well as Duration and Sequence Control fields. 2744 */ 2745 struct sk_buff *ieee80211_nullfunc_get(struct ieee80211_hw *hw, 2746 struct ieee80211_vif *vif); 2747 2748 /** 2749 * ieee80211_probereq_get - retrieve a Probe Request template 2750 * @hw: pointer obtained from ieee80211_alloc_hw(). 2751 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2752 * @ssid: SSID buffer 2753 * @ssid_len: length of SSID 2754 * @ie: buffer containing all IEs except SSID for the template 2755 * @ie_len: length of the IE buffer 2756 * 2757 * Creates a Probe Request template which can, for example, be uploaded to 2758 * hardware. 2759 */ 2760 struct sk_buff *ieee80211_probereq_get(struct ieee80211_hw *hw, 2761 struct ieee80211_vif *vif, 2762 const u8 *ssid, size_t ssid_len, 2763 const u8 *ie, size_t ie_len); 2764 2765 /** 2766 * ieee80211_rts_get - RTS frame generation function 2767 * @hw: pointer obtained from ieee80211_alloc_hw(). 2768 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2769 * @frame: pointer to the frame that is going to be protected by the RTS. 2770 * @frame_len: the frame length (in octets). 2771 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2772 * @rts: The buffer where to store the RTS frame. 2773 * 2774 * If the RTS frames are generated by the host system (i.e., not in 2775 * hardware/firmware), the low-level driver uses this function to receive 2776 * the next RTS frame from the 802.11 code. The low-level is responsible 2777 * for calling this function before and RTS frame is needed. 2778 */ 2779 void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif, 2780 const void *frame, size_t frame_len, 2781 const struct ieee80211_tx_info *frame_txctl, 2782 struct ieee80211_rts *rts); 2783 2784 /** 2785 * ieee80211_rts_duration - Get the duration field for an RTS frame 2786 * @hw: pointer obtained from ieee80211_alloc_hw(). 2787 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2788 * @frame_len: the length of the frame that is going to be protected by the RTS. 2789 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2790 * 2791 * If the RTS is generated in firmware, but the host system must provide 2792 * the duration field, the low-level driver uses this function to receive 2793 * the duration field value in little-endian byteorder. 2794 */ 2795 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw, 2796 struct ieee80211_vif *vif, size_t frame_len, 2797 const struct ieee80211_tx_info *frame_txctl); 2798 2799 /** 2800 * ieee80211_ctstoself_get - CTS-to-self frame generation function 2801 * @hw: pointer obtained from ieee80211_alloc_hw(). 2802 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2803 * @frame: pointer to the frame that is going to be protected by the CTS-to-self. 2804 * @frame_len: the frame length (in octets). 2805 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2806 * @cts: The buffer where to store the CTS-to-self frame. 2807 * 2808 * If the CTS-to-self frames are generated by the host system (i.e., not in 2809 * hardware/firmware), the low-level driver uses this function to receive 2810 * the next CTS-to-self frame from the 802.11 code. The low-level is responsible 2811 * for calling this function before and CTS-to-self frame is needed. 2812 */ 2813 void ieee80211_ctstoself_get(struct ieee80211_hw *hw, 2814 struct ieee80211_vif *vif, 2815 const void *frame, size_t frame_len, 2816 const struct ieee80211_tx_info *frame_txctl, 2817 struct ieee80211_cts *cts); 2818 2819 /** 2820 * ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame 2821 * @hw: pointer obtained from ieee80211_alloc_hw(). 2822 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2823 * @frame_len: the length of the frame that is going to be protected by the CTS-to-self. 2824 * @frame_txctl: &struct ieee80211_tx_info of the frame. 2825 * 2826 * If the CTS-to-self is generated in firmware, but the host system must provide 2827 * the duration field, the low-level driver uses this function to receive 2828 * the duration field value in little-endian byteorder. 2829 */ 2830 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw, 2831 struct ieee80211_vif *vif, 2832 size_t frame_len, 2833 const struct ieee80211_tx_info *frame_txctl); 2834 2835 /** 2836 * ieee80211_generic_frame_duration - Calculate the duration field for a frame 2837 * @hw: pointer obtained from ieee80211_alloc_hw(). 2838 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2839 * @frame_len: the length of the frame. 2840 * @rate: the rate at which the frame is going to be transmitted. 2841 * 2842 * Calculate the duration field of some generic frame, given its 2843 * length and transmission rate (in 100kbps). 2844 */ 2845 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw, 2846 struct ieee80211_vif *vif, 2847 size_t frame_len, 2848 struct ieee80211_rate *rate); 2849 2850 /** 2851 * ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames 2852 * @hw: pointer as obtained from ieee80211_alloc_hw(). 2853 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 2854 * 2855 * Function for accessing buffered broadcast and multicast frames. If 2856 * hardware/firmware does not implement buffering of broadcast/multicast 2857 * frames when power saving is used, 802.11 code buffers them in the host 2858 * memory. The low-level driver uses this function to fetch next buffered 2859 * frame. In most cases, this is used when generating beacon frame. This 2860 * function returns a pointer to the next buffered skb or NULL if no more 2861 * buffered frames are available. 2862 * 2863 * Note: buffered frames are returned only after DTIM beacon frame was 2864 * generated with ieee80211_beacon_get() and the low-level driver must thus 2865 * call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns 2866 * NULL if the previous generated beacon was not DTIM, so the low-level driver 2867 * does not need to check for DTIM beacons separately and should be able to 2868 * use common code for all beacons. 2869 */ 2870 struct sk_buff * 2871 ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif); 2872 2873 /** 2874 * ieee80211_get_tkip_p1k_iv - get a TKIP phase 1 key for IV32 2875 * 2876 * This function returns the TKIP phase 1 key for the given IV32. 2877 * 2878 * @keyconf: the parameter passed with the set key 2879 * @iv32: IV32 to get the P1K for 2880 * @p1k: a buffer to which the key will be written, as 5 u16 values 2881 */ 2882 void ieee80211_get_tkip_p1k_iv(struct ieee80211_key_conf *keyconf, 2883 u32 iv32, u16 *p1k); 2884 2885 /** 2886 * ieee80211_get_tkip_p1k - get a TKIP phase 1 key 2887 * 2888 * This function returns the TKIP phase 1 key for the IV32 taken 2889 * from the given packet. 2890 * 2891 * @keyconf: the parameter passed with the set key 2892 * @skb: the packet to take the IV32 value from that will be encrypted 2893 * with this P1K 2894 * @p1k: a buffer to which the key will be written, as 5 u16 values 2895 */ 2896 static inline void ieee80211_get_tkip_p1k(struct ieee80211_key_conf *keyconf, 2897 struct sk_buff *skb, u16 *p1k) 2898 { 2899 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data; 2900 const u8 *data = (u8 *)hdr + ieee80211_hdrlen(hdr->frame_control); 2901 u32 iv32 = get_unaligned_le32(&data[4]); 2902 2903 ieee80211_get_tkip_p1k_iv(keyconf, iv32, p1k); 2904 } 2905 2906 /** 2907 * ieee80211_get_tkip_rx_p1k - get a TKIP phase 1 key for RX 2908 * 2909 * This function returns the TKIP phase 1 key for the given IV32 2910 * and transmitter address. 2911 * 2912 * @keyconf: the parameter passed with the set key 2913 * @ta: TA that will be used with the key 2914 * @iv32: IV32 to get the P1K for 2915 * @p1k: a buffer to which the key will be written, as 5 u16 values 2916 */ 2917 void ieee80211_get_tkip_rx_p1k(struct ieee80211_key_conf *keyconf, 2918 const u8 *ta, u32 iv32, u16 *p1k); 2919 2920 /** 2921 * ieee80211_get_tkip_p2k - get a TKIP phase 2 key 2922 * 2923 * This function computes the TKIP RC4 key for the IV values 2924 * in the packet. 2925 * 2926 * @keyconf: the parameter passed with the set key 2927 * @skb: the packet to take the IV32/IV16 values from that will be 2928 * encrypted with this key 2929 * @p2k: a buffer to which the key will be written, 16 bytes 2930 */ 2931 void ieee80211_get_tkip_p2k(struct ieee80211_key_conf *keyconf, 2932 struct sk_buff *skb, u8 *p2k); 2933 2934 /** 2935 * struct ieee80211_key_seq - key sequence counter 2936 * 2937 * @tkip: TKIP data, containing IV32 and IV16 in host byte order 2938 * @ccmp: PN data, most significant byte first (big endian, 2939 * reverse order than in packet) 2940 * @aes_cmac: PN data, most significant byte first (big endian, 2941 * reverse order than in packet) 2942 */ 2943 struct ieee80211_key_seq { 2944 union { 2945 struct { 2946 u32 iv32; 2947 u16 iv16; 2948 } tkip; 2949 struct { 2950 u8 pn[6]; 2951 } ccmp; 2952 struct { 2953 u8 pn[6]; 2954 } aes_cmac; 2955 }; 2956 }; 2957 2958 /** 2959 * ieee80211_get_key_tx_seq - get key TX sequence counter 2960 * 2961 * @keyconf: the parameter passed with the set key 2962 * @seq: buffer to receive the sequence data 2963 * 2964 * This function allows a driver to retrieve the current TX IV/PN 2965 * for the given key. It must not be called if IV generation is 2966 * offloaded to the device. 2967 * 2968 * Note that this function may only be called when no TX processing 2969 * can be done concurrently, for example when queues are stopped 2970 * and the stop has been synchronized. 2971 */ 2972 void ieee80211_get_key_tx_seq(struct ieee80211_key_conf *keyconf, 2973 struct ieee80211_key_seq *seq); 2974 2975 /** 2976 * ieee80211_get_key_rx_seq - get key RX sequence counter 2977 * 2978 * @keyconf: the parameter passed with the set key 2979 * @tid: The TID, or -1 for the management frame value (CCMP only); 2980 * the value on TID 0 is also used for non-QoS frames. For 2981 * CMAC, only TID 0 is valid. 2982 * @seq: buffer to receive the sequence data 2983 * 2984 * This function allows a driver to retrieve the current RX IV/PNs 2985 * for the given key. It must not be called if IV checking is done 2986 * by the device and not by mac80211. 2987 * 2988 * Note that this function may only be called when no RX processing 2989 * can be done concurrently. 2990 */ 2991 void ieee80211_get_key_rx_seq(struct ieee80211_key_conf *keyconf, 2992 int tid, struct ieee80211_key_seq *seq); 2993 2994 /** 2995 * ieee80211_gtk_rekey_notify - notify userspace supplicant of rekeying 2996 * @vif: virtual interface the rekeying was done on 2997 * @bssid: The BSSID of the AP, for checking association 2998 * @replay_ctr: the new replay counter after GTK rekeying 2999 * @gfp: allocation flags 3000 */ 3001 void ieee80211_gtk_rekey_notify(struct ieee80211_vif *vif, const u8 *bssid, 3002 const u8 *replay_ctr, gfp_t gfp); 3003 3004 /** 3005 * ieee80211_wake_queue - wake specific queue 3006 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3007 * @queue: queue number (counted from zero). 3008 * 3009 * Drivers should use this function instead of netif_wake_queue. 3010 */ 3011 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue); 3012 3013 /** 3014 * ieee80211_stop_queue - stop specific queue 3015 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3016 * @queue: queue number (counted from zero). 3017 * 3018 * Drivers should use this function instead of netif_stop_queue. 3019 */ 3020 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue); 3021 3022 /** 3023 * ieee80211_queue_stopped - test status of the queue 3024 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3025 * @queue: queue number (counted from zero). 3026 * 3027 * Drivers should use this function instead of netif_stop_queue. 3028 */ 3029 3030 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue); 3031 3032 /** 3033 * ieee80211_stop_queues - stop all queues 3034 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3035 * 3036 * Drivers should use this function instead of netif_stop_queue. 3037 */ 3038 void ieee80211_stop_queues(struct ieee80211_hw *hw); 3039 3040 /** 3041 * ieee80211_wake_queues - wake all queues 3042 * @hw: pointer as obtained from ieee80211_alloc_hw(). 3043 * 3044 * Drivers should use this function instead of netif_wake_queue. 3045 */ 3046 void ieee80211_wake_queues(struct ieee80211_hw *hw); 3047 3048 /** 3049 * ieee80211_scan_completed - completed hardware scan 3050 * 3051 * When hardware scan offload is used (i.e. the hw_scan() callback is 3052 * assigned) this function needs to be called by the driver to notify 3053 * mac80211 that the scan finished. This function can be called from 3054 * any context, including hardirq context. 3055 * 3056 * @hw: the hardware that finished the scan 3057 * @aborted: set to true if scan was aborted 3058 */ 3059 void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted); 3060 3061 /** 3062 * ieee80211_sched_scan_results - got results from scheduled scan 3063 * 3064 * When a scheduled scan is running, this function needs to be called by the 3065 * driver whenever there are new scan results available. 3066 * 3067 * @hw: the hardware that is performing scheduled scans 3068 */ 3069 void ieee80211_sched_scan_results(struct ieee80211_hw *hw); 3070 3071 /** 3072 * ieee80211_sched_scan_stopped - inform that the scheduled scan has stopped 3073 * 3074 * When a scheduled scan is running, this function can be called by 3075 * the driver if it needs to stop the scan to perform another task. 3076 * Usual scenarios are drivers that cannot continue the scheduled scan 3077 * while associating, for instance. 3078 * 3079 * @hw: the hardware that is performing scheduled scans 3080 */ 3081 void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw); 3082 3083 /** 3084 * ieee80211_iterate_active_interfaces - iterate active interfaces 3085 * 3086 * This function iterates over the interfaces associated with a given 3087 * hardware that are currently active and calls the callback for them. 3088 * This function allows the iterator function to sleep, when the iterator 3089 * function is atomic @ieee80211_iterate_active_interfaces_atomic can 3090 * be used. 3091 * Does not iterate over a new interface during add_interface() 3092 * 3093 * @hw: the hardware struct of which the interfaces should be iterated over 3094 * @iterator: the iterator function to call 3095 * @data: first argument of the iterator function 3096 */ 3097 void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw, 3098 void (*iterator)(void *data, u8 *mac, 3099 struct ieee80211_vif *vif), 3100 void *data); 3101 3102 /** 3103 * ieee80211_iterate_active_interfaces_atomic - iterate active interfaces 3104 * 3105 * This function iterates over the interfaces associated with a given 3106 * hardware that are currently active and calls the callback for them. 3107 * This function requires the iterator callback function to be atomic, 3108 * if that is not desired, use @ieee80211_iterate_active_interfaces instead. 3109 * Does not iterate over a new interface during add_interface() 3110 * 3111 * @hw: the hardware struct of which the interfaces should be iterated over 3112 * @iterator: the iterator function to call, cannot sleep 3113 * @data: first argument of the iterator function 3114 */ 3115 void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw, 3116 void (*iterator)(void *data, 3117 u8 *mac, 3118 struct ieee80211_vif *vif), 3119 void *data); 3120 3121 /** 3122 * ieee80211_queue_work - add work onto the mac80211 workqueue 3123 * 3124 * Drivers and mac80211 use this to add work onto the mac80211 workqueue. 3125 * This helper ensures drivers are not queueing work when they should not be. 3126 * 3127 * @hw: the hardware struct for the interface we are adding work for 3128 * @work: the work we want to add onto the mac80211 workqueue 3129 */ 3130 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work); 3131 3132 /** 3133 * ieee80211_queue_delayed_work - add work onto the mac80211 workqueue 3134 * 3135 * Drivers and mac80211 use this to queue delayed work onto the mac80211 3136 * workqueue. 3137 * 3138 * @hw: the hardware struct for the interface we are adding work for 3139 * @dwork: delayable work to queue onto the mac80211 workqueue 3140 * @delay: number of jiffies to wait before queueing 3141 */ 3142 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw, 3143 struct delayed_work *dwork, 3144 unsigned long delay); 3145 3146 /** 3147 * ieee80211_start_tx_ba_session - Start a tx Block Ack session. 3148 * @sta: the station for which to start a BA session 3149 * @tid: the TID to BA on. 3150 * @timeout: session timeout value (in TUs) 3151 * 3152 * Return: success if addBA request was sent, failure otherwise 3153 * 3154 * Although mac80211/low level driver/user space application can estimate 3155 * the need to start aggregation on a certain RA/TID, the session level 3156 * will be managed by the mac80211. 3157 */ 3158 int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid, 3159 u16 timeout); 3160 3161 /** 3162 * ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate. 3163 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3164 * @ra: receiver address of the BA session recipient. 3165 * @tid: the TID to BA on. 3166 * 3167 * This function must be called by low level driver once it has 3168 * finished with preparations for the BA session. It can be called 3169 * from any context. 3170 */ 3171 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3172 u16 tid); 3173 3174 /** 3175 * ieee80211_stop_tx_ba_session - Stop a Block Ack session. 3176 * @sta: the station whose BA session to stop 3177 * @tid: the TID to stop BA. 3178 * 3179 * Return: negative error if the TID is invalid, or no aggregation active 3180 * 3181 * Although mac80211/low level driver/user space application can estimate 3182 * the need to stop aggregation on a certain RA/TID, the session level 3183 * will be managed by the mac80211. 3184 */ 3185 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid); 3186 3187 /** 3188 * ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate. 3189 * @vif: &struct ieee80211_vif pointer from the add_interface callback 3190 * @ra: receiver address of the BA session recipient. 3191 * @tid: the desired TID to BA on. 3192 * 3193 * This function must be called by low level driver once it has 3194 * finished with preparations for the BA session tear down. It 3195 * can be called from any context. 3196 */ 3197 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra, 3198 u16 tid); 3199 3200 /** 3201 * ieee80211_find_sta - find a station 3202 * 3203 * @vif: virtual interface to look for station on 3204 * @addr: station's address 3205 * 3206 * This function must be called under RCU lock and the 3207 * resulting pointer is only valid under RCU lock as well. 3208 */ 3209 struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif, 3210 const u8 *addr); 3211 3212 /** 3213 * ieee80211_find_sta_by_ifaddr - find a station on hardware 3214 * 3215 * @hw: pointer as obtained from ieee80211_alloc_hw() 3216 * @addr: remote station's address 3217 * @localaddr: local address (vif->sdata->vif.addr). Use NULL for 'any'. 3218 * 3219 * This function must be called under RCU lock and the 3220 * resulting pointer is only valid under RCU lock as well. 3221 * 3222 * NOTE: You may pass NULL for localaddr, but then you will just get 3223 * the first STA that matches the remote address 'addr'. 3224 * We can have multiple STA associated with multiple 3225 * logical stations (e.g. consider a station connecting to another 3226 * BSSID on the same AP hardware without disconnecting first). 3227 * In this case, the result of this method with localaddr NULL 3228 * is not reliable. 3229 * 3230 * DO NOT USE THIS FUNCTION with localaddr NULL if at all possible. 3231 */ 3232 struct ieee80211_sta *ieee80211_find_sta_by_ifaddr(struct ieee80211_hw *hw, 3233 const u8 *addr, 3234 const u8 *localaddr); 3235 3236 /** 3237 * ieee80211_sta_block_awake - block station from waking up 3238 * @hw: the hardware 3239 * @pubsta: the station 3240 * @block: whether to block or unblock 3241 * 3242 * Some devices require that all frames that are on the queues 3243 * for a specific station that went to sleep are flushed before 3244 * a poll response or frames after the station woke up can be 3245 * delivered to that it. Note that such frames must be rejected 3246 * by the driver as filtered, with the appropriate status flag. 3247 * 3248 * This function allows implementing this mode in a race-free 3249 * manner. 3250 * 3251 * To do this, a driver must keep track of the number of frames 3252 * still enqueued for a specific station. If this number is not 3253 * zero when the station goes to sleep, the driver must call 3254 * this function to force mac80211 to consider the station to 3255 * be asleep regardless of the station's actual state. Once the 3256 * number of outstanding frames reaches zero, the driver must 3257 * call this function again to unblock the station. That will 3258 * cause mac80211 to be able to send ps-poll responses, and if 3259 * the station queried in the meantime then frames will also 3260 * be sent out as a result of this. Additionally, the driver 3261 * will be notified that the station woke up some time after 3262 * it is unblocked, regardless of whether the station actually 3263 * woke up while blocked or not. 3264 */ 3265 void ieee80211_sta_block_awake(struct ieee80211_hw *hw, 3266 struct ieee80211_sta *pubsta, bool block); 3267 3268 /** 3269 * ieee80211_sta_eosp - notify mac80211 about end of SP 3270 * @pubsta: the station 3271 * 3272 * When a device transmits frames in a way that it can't tell 3273 * mac80211 in the TX status about the EOSP, it must clear the 3274 * %IEEE80211_TX_STATUS_EOSP bit and call this function instead. 3275 * This applies for PS-Poll as well as uAPSD. 3276 * 3277 * Note that there is no non-_irqsafe version right now as 3278 * it wasn't needed, but just like _tx_status() and _rx() 3279 * must not be mixed in irqsafe/non-irqsafe versions, this 3280 * function must not be mixed with those either. Use the 3281 * all irqsafe, or all non-irqsafe, don't mix! If you need 3282 * the non-irqsafe version of this, you need to add it. 3283 */ 3284 void ieee80211_sta_eosp_irqsafe(struct ieee80211_sta *pubsta); 3285 3286 /** 3287 * ieee80211_iter_keys - iterate keys programmed into the device 3288 * @hw: pointer obtained from ieee80211_alloc_hw() 3289 * @vif: virtual interface to iterate, may be %NULL for all 3290 * @iter: iterator function that will be called for each key 3291 * @iter_data: custom data to pass to the iterator function 3292 * 3293 * This function can be used to iterate all the keys known to 3294 * mac80211, even those that weren't previously programmed into 3295 * the device. This is intended for use in WoWLAN if the device 3296 * needs reprogramming of the keys during suspend. Note that due 3297 * to locking reasons, it is also only safe to call this at few 3298 * spots since it must hold the RTNL and be able to sleep. 3299 * 3300 * The order in which the keys are iterated matches the order 3301 * in which they were originally installed and handed to the 3302 * set_key callback. 3303 */ 3304 void ieee80211_iter_keys(struct ieee80211_hw *hw, 3305 struct ieee80211_vif *vif, 3306 void (*iter)(struct ieee80211_hw *hw, 3307 struct ieee80211_vif *vif, 3308 struct ieee80211_sta *sta, 3309 struct ieee80211_key_conf *key, 3310 void *data), 3311 void *iter_data); 3312 3313 /** 3314 * ieee80211_ap_probereq_get - retrieve a Probe Request template 3315 * @hw: pointer obtained from ieee80211_alloc_hw(). 3316 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3317 * 3318 * Creates a Probe Request template which can, for example, be uploaded to 3319 * hardware. The template is filled with bssid, ssid and supported rate 3320 * information. This function must only be called from within the 3321 * .bss_info_changed callback function and only in managed mode. The function 3322 * is only useful when the interface is associated, otherwise it will return 3323 * NULL. 3324 */ 3325 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3326 struct ieee80211_vif *vif); 3327 3328 /** 3329 * ieee80211_beacon_loss - inform hardware does not receive beacons 3330 * 3331 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3332 * 3333 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER and 3334 * %IEEE80211_CONF_PS is set, the driver needs to inform whenever the 3335 * hardware is not receiving beacons with this function. 3336 */ 3337 void ieee80211_beacon_loss(struct ieee80211_vif *vif); 3338 3339 /** 3340 * ieee80211_connection_loss - inform hardware has lost connection to the AP 3341 * 3342 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3343 * 3344 * When beacon filtering is enabled with %IEEE80211_VIF_BEACON_FILTER, and 3345 * %IEEE80211_CONF_PS and %IEEE80211_HW_CONNECTION_MONITOR are set, the driver 3346 * needs to inform if the connection to the AP has been lost. 3347 * 3348 * This function will cause immediate change to disassociated state, 3349 * without connection recovery attempts. 3350 */ 3351 void ieee80211_connection_loss(struct ieee80211_vif *vif); 3352 3353 /** 3354 * ieee80211_resume_disconnect - disconnect from AP after resume 3355 * 3356 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3357 * 3358 * Instructs mac80211 to disconnect from the AP after resume. 3359 * Drivers can use this after WoWLAN if they know that the 3360 * connection cannot be kept up, for example because keys were 3361 * used while the device was asleep but the replay counters or 3362 * similar cannot be retrieved from the device during resume. 3363 * 3364 * Note that due to implementation issues, if the driver uses 3365 * the reconfiguration functionality during resume the interface 3366 * will still be added as associated first during resume and then 3367 * disconnect normally later. 3368 * 3369 * This function can only be called from the resume callback and 3370 * the driver must not be holding any of its own locks while it 3371 * calls this function, or at least not any locks it needs in the 3372 * key configuration paths (if it supports HW crypto). 3373 */ 3374 void ieee80211_resume_disconnect(struct ieee80211_vif *vif); 3375 3376 /** 3377 * ieee80211_disable_dyn_ps - force mac80211 to temporarily disable dynamic psm 3378 * 3379 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3380 * 3381 * Some hardware require full power save to manage simultaneous BT traffic 3382 * on the WLAN frequency. Full PSM is required periodically, whenever there are 3383 * burst of BT traffic. The hardware gets information of BT traffic via 3384 * hardware co-existence lines, and consequentially requests mac80211 to 3385 * (temporarily) enter full psm. 3386 * This function will only temporarily disable dynamic PS, not enable PSM if 3387 * it was not already enabled. 3388 * The driver must make sure to re-enable dynamic PS using 3389 * ieee80211_enable_dyn_ps() if the driver has disabled it. 3390 * 3391 */ 3392 void ieee80211_disable_dyn_ps(struct ieee80211_vif *vif); 3393 3394 /** 3395 * ieee80211_enable_dyn_ps - restore dynamic psm after being disabled 3396 * 3397 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3398 * 3399 * This function restores dynamic PS after being temporarily disabled via 3400 * ieee80211_disable_dyn_ps(). Each ieee80211_disable_dyn_ps() call must 3401 * be coupled with an eventual call to this function. 3402 * 3403 */ 3404 void ieee80211_enable_dyn_ps(struct ieee80211_vif *vif); 3405 3406 /** 3407 * ieee80211_cqm_rssi_notify - inform a configured connection quality monitoring 3408 * rssi threshold triggered 3409 * 3410 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3411 * @rssi_event: the RSSI trigger event type 3412 * @gfp: context flags 3413 * 3414 * When the %IEEE80211_VIF_SUPPORTS_CQM_RSSI is set, and a connection quality 3415 * monitoring is configured with an rssi threshold, the driver will inform 3416 * whenever the rssi level reaches the threshold. 3417 */ 3418 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 3419 enum nl80211_cqm_rssi_threshold_event rssi_event, 3420 gfp_t gfp); 3421 3422 /** 3423 * ieee80211_get_operstate - get the operstate of the vif 3424 * 3425 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3426 * 3427 * The driver might need to know the operstate of the net_device 3428 * (specifically, whether the link is IF_OPER_UP after resume) 3429 */ 3430 unsigned char ieee80211_get_operstate(struct ieee80211_vif *vif); 3431 3432 /** 3433 * ieee80211_chswitch_done - Complete channel switch process 3434 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3435 * @success: make the channel switch successful or not 3436 * 3437 * Complete the channel switch post-process: set the new operational channel 3438 * and wake up the suspended queues. 3439 */ 3440 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success); 3441 3442 /** 3443 * ieee80211_request_smps - request SM PS transition 3444 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3445 * @smps_mode: new SM PS mode 3446 * 3447 * This allows the driver to request an SM PS transition in managed 3448 * mode. This is useful when the driver has more information than 3449 * the stack about possible interference, for example by bluetooth. 3450 */ 3451 void ieee80211_request_smps(struct ieee80211_vif *vif, 3452 enum ieee80211_smps_mode smps_mode); 3453 3454 /** 3455 * ieee80211_key_removed - disable hw acceleration for key 3456 * @key_conf: The key hw acceleration should be disabled for 3457 * 3458 * This allows drivers to indicate that the given key has been 3459 * removed from hardware acceleration, due to a new key that 3460 * was added. Don't use this if the key can continue to be used 3461 * for TX, if the key restriction is on RX only it is permitted 3462 * to keep the key for TX only and not call this function. 3463 * 3464 * Due to locking constraints, it may only be called during 3465 * @set_key. This function must be allowed to sleep, and the 3466 * key it tries to disable may still be used until it returns. 3467 */ 3468 void ieee80211_key_removed(struct ieee80211_key_conf *key_conf); 3469 3470 /** 3471 * ieee80211_ready_on_channel - notification of remain-on-channel start 3472 * @hw: pointer as obtained from ieee80211_alloc_hw() 3473 */ 3474 void ieee80211_ready_on_channel(struct ieee80211_hw *hw); 3475 3476 /** 3477 * ieee80211_remain_on_channel_expired - remain_on_channel duration expired 3478 * @hw: pointer as obtained from ieee80211_alloc_hw() 3479 */ 3480 void ieee80211_remain_on_channel_expired(struct ieee80211_hw *hw); 3481 3482 /** 3483 * ieee80211_stop_rx_ba_session - callback to stop existing BA sessions 3484 * 3485 * in order not to harm the system performance and user experience, the device 3486 * may request not to allow any rx ba session and tear down existing rx ba 3487 * sessions based on system constraints such as periodic BT activity that needs 3488 * to limit wlan activity (eg.sco or a2dp)." 3489 * in such cases, the intention is to limit the duration of the rx ppdu and 3490 * therefore prevent the peer device to use a-mpdu aggregation. 3491 * 3492 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3493 * @ba_rx_bitmap: Bit map of open rx ba per tid 3494 * @addr: & to bssid mac address 3495 */ 3496 void ieee80211_stop_rx_ba_session(struct ieee80211_vif *vif, u16 ba_rx_bitmap, 3497 const u8 *addr); 3498 3499 /** 3500 * ieee80211_send_bar - send a BlockAckReq frame 3501 * 3502 * can be used to flush pending frames from the peer's aggregation reorder 3503 * buffer. 3504 * 3505 * @vif: &struct ieee80211_vif pointer from the add_interface callback. 3506 * @ra: the peer's destination address 3507 * @tid: the TID of the aggregation session 3508 * @ssn: the new starting sequence number for the receiver 3509 */ 3510 void ieee80211_send_bar(struct ieee80211_vif *vif, u8 *ra, u16 tid, u16 ssn); 3511 3512 /* Rate control API */ 3513 3514 /** 3515 * enum rate_control_changed - flags to indicate which parameter changed 3516 * 3517 * @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have 3518 * changed, rate control algorithm can update its internal state if needed. 3519 * @IEEE80211_RC_SMPS_CHANGED: The SMPS state of the station changed, the rate 3520 * control algorithm needs to adjust accordingly. 3521 */ 3522 enum rate_control_changed { 3523 IEEE80211_RC_HT_CHANGED = BIT(0), 3524 IEEE80211_RC_SMPS_CHANGED = BIT(1), 3525 }; 3526 3527 /** 3528 * struct ieee80211_tx_rate_control - rate control information for/from RC algo 3529 * 3530 * @hw: The hardware the algorithm is invoked for. 3531 * @sband: The band this frame is being transmitted on. 3532 * @bss_conf: the current BSS configuration 3533 * @skb: the skb that will be transmitted, the control information in it needs 3534 * to be filled in 3535 * @reported_rate: The rate control algorithm can fill this in to indicate 3536 * which rate should be reported to userspace as the current rate and 3537 * used for rate calculations in the mesh network. 3538 * @rts: whether RTS will be used for this frame because it is longer than the 3539 * RTS threshold 3540 * @short_preamble: whether mac80211 will request short-preamble transmission 3541 * if the selected rate supports it 3542 * @max_rate_idx: user-requested maximum (legacy) rate 3543 * (deprecated; this will be removed once drivers get updated to use 3544 * rate_idx_mask) 3545 * @rate_idx_mask: user-requested (legacy) rate mask 3546 * @rate_idx_mcs_mask: user-requested MCS rate mask 3547 * @bss: whether this frame is sent out in AP or IBSS mode 3548 */ 3549 struct ieee80211_tx_rate_control { 3550 struct ieee80211_hw *hw; 3551 struct ieee80211_supported_band *sband; 3552 struct ieee80211_bss_conf *bss_conf; 3553 struct sk_buff *skb; 3554 struct ieee80211_tx_rate reported_rate; 3555 bool rts, short_preamble; 3556 u8 max_rate_idx; 3557 u32 rate_idx_mask; 3558 u8 rate_idx_mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; 3559 bool bss; 3560 }; 3561 3562 struct rate_control_ops { 3563 struct module *module; 3564 const char *name; 3565 void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir); 3566 void (*free)(void *priv); 3567 3568 void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp); 3569 void (*rate_init)(void *priv, struct ieee80211_supported_band *sband, 3570 struct ieee80211_sta *sta, void *priv_sta); 3571 void (*rate_update)(void *priv, struct ieee80211_supported_band *sband, 3572 struct ieee80211_sta *sta, 3573 void *priv_sta, u32 changed, 3574 enum nl80211_channel_type oper_chan_type); 3575 void (*free_sta)(void *priv, struct ieee80211_sta *sta, 3576 void *priv_sta); 3577 3578 void (*tx_status)(void *priv, struct ieee80211_supported_band *sband, 3579 struct ieee80211_sta *sta, void *priv_sta, 3580 struct sk_buff *skb); 3581 void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta, 3582 struct ieee80211_tx_rate_control *txrc); 3583 3584 void (*add_sta_debugfs)(void *priv, void *priv_sta, 3585 struct dentry *dir); 3586 void (*remove_sta_debugfs)(void *priv, void *priv_sta); 3587 }; 3588 3589 static inline int rate_supported(struct ieee80211_sta *sta, 3590 enum ieee80211_band band, 3591 int index) 3592 { 3593 return (sta == NULL || sta->supp_rates[band] & BIT(index)); 3594 } 3595 3596 /** 3597 * rate_control_send_low - helper for drivers for management/no-ack frames 3598 * 3599 * Rate control algorithms that agree to use the lowest rate to 3600 * send management frames and NO_ACK data with the respective hw 3601 * retries should use this in the beginning of their mac80211 get_rate 3602 * callback. If true is returned the rate control can simply return. 3603 * If false is returned we guarantee that sta and sta and priv_sta is 3604 * not null. 3605 * 3606 * Rate control algorithms wishing to do more intelligent selection of 3607 * rate for multicast/broadcast frames may choose to not use this. 3608 * 3609 * @sta: &struct ieee80211_sta pointer to the target destination. Note 3610 * that this may be null. 3611 * @priv_sta: private rate control structure. This may be null. 3612 * @txrc: rate control information we sholud populate for mac80211. 3613 */ 3614 bool rate_control_send_low(struct ieee80211_sta *sta, 3615 void *priv_sta, 3616 struct ieee80211_tx_rate_control *txrc); 3617 3618 3619 static inline s8 3620 rate_lowest_index(struct ieee80211_supported_band *sband, 3621 struct ieee80211_sta *sta) 3622 { 3623 int i; 3624 3625 for (i = 0; i < sband->n_bitrates; i++) 3626 if (rate_supported(sta, sband->band, i)) 3627 return i; 3628 3629 /* warn when we cannot find a rate. */ 3630 WARN_ON_ONCE(1); 3631 3632 /* and return 0 (the lowest index) */ 3633 return 0; 3634 } 3635 3636 static inline 3637 bool rate_usable_index_exists(struct ieee80211_supported_band *sband, 3638 struct ieee80211_sta *sta) 3639 { 3640 unsigned int i; 3641 3642 for (i = 0; i < sband->n_bitrates; i++) 3643 if (rate_supported(sta, sband->band, i)) 3644 return true; 3645 return false; 3646 } 3647 3648 int ieee80211_rate_control_register(struct rate_control_ops *ops); 3649 void ieee80211_rate_control_unregister(struct rate_control_ops *ops); 3650 3651 static inline bool 3652 conf_is_ht20(struct ieee80211_conf *conf) 3653 { 3654 return conf->channel_type == NL80211_CHAN_HT20; 3655 } 3656 3657 static inline bool 3658 conf_is_ht40_minus(struct ieee80211_conf *conf) 3659 { 3660 return conf->channel_type == NL80211_CHAN_HT40MINUS; 3661 } 3662 3663 static inline bool 3664 conf_is_ht40_plus(struct ieee80211_conf *conf) 3665 { 3666 return conf->channel_type == NL80211_CHAN_HT40PLUS; 3667 } 3668 3669 static inline bool 3670 conf_is_ht40(struct ieee80211_conf *conf) 3671 { 3672 return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf); 3673 } 3674 3675 static inline bool 3676 conf_is_ht(struct ieee80211_conf *conf) 3677 { 3678 return conf->channel_type != NL80211_CHAN_NO_HT; 3679 } 3680 3681 static inline enum nl80211_iftype 3682 ieee80211_iftype_p2p(enum nl80211_iftype type, bool p2p) 3683 { 3684 if (p2p) { 3685 switch (type) { 3686 case NL80211_IFTYPE_STATION: 3687 return NL80211_IFTYPE_P2P_CLIENT; 3688 case NL80211_IFTYPE_AP: 3689 return NL80211_IFTYPE_P2P_GO; 3690 default: 3691 break; 3692 } 3693 } 3694 return type; 3695 } 3696 3697 static inline enum nl80211_iftype 3698 ieee80211_vif_type_p2p(struct ieee80211_vif *vif) 3699 { 3700 return ieee80211_iftype_p2p(vif->type, vif->p2p); 3701 } 3702 3703 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 3704 int rssi_min_thold, 3705 int rssi_max_thold); 3706 3707 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif); 3708 3709 int ieee80211_add_srates_ie(struct ieee80211_vif *vif, struct sk_buff *skb); 3710 3711 int ieee80211_add_ext_srates_ie(struct ieee80211_vif *vif, 3712 struct sk_buff *skb); 3713 #endif /* MAC80211_H */ 3714