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mac80211.h
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mac80211.h
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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* mac80211 <-> driver interface
*
* Copyright 2002-2005, Devicescape Software, Inc.
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
* Copyright 2007-2010 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2015 - 2017 Intel Deutschland GmbH
* Copyright (C) 2018 - 2020 Intel Corporation
*/
#ifndef MAC80211_H
#define MAC80211_H
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/if_ether.h>
#include <linux/skbuff.h>
#include <linux/ieee80211.h>
#include <net/cfg80211.h>
#include <net/codel.h>
#include <net/ieee80211_radiotap.h>
#include <asm/unaligned.h>
/**
* DOC: Introduction
*
* mac80211 is the Linux stack for 802.11 hardware that implements
* only partial functionality in hard- or firmware. This document
* defines the interface between mac80211 and low-level hardware
* drivers.
*/
/**
* DOC: Calling mac80211 from interrupts
*
* Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
* called in hardware interrupt context. The low-level driver must not call any
* other functions in hardware interrupt context. If there is a need for such
* call, the low-level driver should first ACK the interrupt and perform the
* IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
* tasklet function.
*
* NOTE: If the driver opts to use the _irqsafe() functions, it may not also
* use the non-IRQ-safe functions!
*/
/**
* DOC: Warning
*
* If you're reading this document and not the header file itself, it will
* be incomplete because not all documentation has been converted yet.
*/
/**
* DOC: Frame format
*
* As a general rule, when frames are passed between mac80211 and the driver,
* they start with the IEEE 802.11 header and include the same octets that are
* sent over the air except for the FCS which should be calculated by the
* hardware.
*
* There are, however, various exceptions to this rule for advanced features:
*
* The first exception is for hardware encryption and decryption offload
* where the IV/ICV may or may not be generated in hardware.
*
* Secondly, when the hardware handles fragmentation, the frame handed to
* the driver from mac80211 is the MSDU, not the MPDU.
*/
/**
* DOC: mac80211 workqueue
*
* mac80211 provides its own workqueue for drivers and internal mac80211 use.
* The workqueue is a single threaded workqueue and can only be accessed by
* helpers for sanity checking. Drivers must ensure all work added onto the
* mac80211 workqueue should be cancelled on the driver stop() callback.
*
* mac80211 will flushed the workqueue upon interface removal and during
* suspend.
*
* All work performed on the mac80211 workqueue must not acquire the RTNL lock.
*
*/
/**
* DOC: mac80211 software tx queueing
*
* mac80211 provides an optional intermediate queueing implementation designed
* to allow the driver to keep hardware queues short and provide some fairness
* between different stations/interfaces.
* In this model, the driver pulls data frames from the mac80211 queue instead
* of letting mac80211 push them via drv_tx().
* Other frames (e.g. control or management) are still pushed using drv_tx().
*
* Drivers indicate that they use this model by implementing the .wake_tx_queue
* driver operation.
*
* Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with
* another per-sta for non-data/non-mgmt and bufferable management frames, and
* a single per-vif queue for multicast data frames.
*
* The driver is expected to initialize its private per-queue data for stations
* and interfaces in the .add_interface and .sta_add ops.
*
* The driver can't access the queue directly. To dequeue a frame from a
* txq, it calls ieee80211_tx_dequeue(). Whenever mac80211 adds a new frame to a
* queue, it calls the .wake_tx_queue driver op.
*
* Drivers can optionally delegate responsibility for scheduling queues to
* mac80211, to take advantage of airtime fairness accounting. In this case, to
* obtain the next queue to pull frames from, the driver calls
* ieee80211_next_txq(). The driver is then expected to return the txq using
* ieee80211_return_txq().
*
* For AP powersave TIM handling, the driver only needs to indicate if it has
* buffered packets in the driver specific data structures by calling
* ieee80211_sta_set_buffered(). For frames buffered in the ieee80211_txq
* struct, mac80211 sets the appropriate TIM PVB bits and calls
* .release_buffered_frames().
* In that callback the driver is therefore expected to release its own
* buffered frames and afterwards also frames from the ieee80211_txq (obtained
* via the usual ieee80211_tx_dequeue).
*/
struct device;
/**
* enum ieee80211_max_queues - maximum number of queues
*
* @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
* @IEEE80211_MAX_QUEUE_MAP: bitmap with maximum queues set
*/
enum ieee80211_max_queues {
IEEE80211_MAX_QUEUES = 16,
IEEE80211_MAX_QUEUE_MAP = BIT(IEEE80211_MAX_QUEUES) - 1,
};
#define IEEE80211_INVAL_HW_QUEUE 0xff
/**
* enum ieee80211_ac_numbers - AC numbers as used in mac80211
* @IEEE80211_AC_VO: voice
* @IEEE80211_AC_VI: video
* @IEEE80211_AC_BE: best effort
* @IEEE80211_AC_BK: background
*/
enum ieee80211_ac_numbers {
IEEE80211_AC_VO = 0,
IEEE80211_AC_VI = 1,
IEEE80211_AC_BE = 2,
IEEE80211_AC_BK = 3,
};
/**
* struct ieee80211_tx_queue_params - transmit queue configuration
*
* The information provided in this structure is required for QoS
* transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
*
* @aifs: arbitration interframe space [0..255]
* @cw_min: minimum contention window [a value of the form
* 2^n-1 in the range 1..32767]
* @cw_max: maximum contention window [like @cw_min]
* @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
* @acm: is mandatory admission control required for the access category
* @uapsd: is U-APSD mode enabled for the queue
* @mu_edca: is the MU EDCA configured
* @mu_edca_param_rec: MU EDCA Parameter Record for HE
*/
struct ieee80211_tx_queue_params {
u16 txop;
u16 cw_min;
u16 cw_max;
u8 aifs;
bool acm;
bool uapsd;
bool mu_edca;
struct ieee80211_he_mu_edca_param_ac_rec mu_edca_param_rec;
};
struct ieee80211_low_level_stats {
unsigned int dot11ACKFailureCount;
unsigned int dot11RTSFailureCount;
unsigned int dot11FCSErrorCount;
unsigned int dot11RTSSuccessCount;
};
/**
* enum ieee80211_chanctx_change - change flag for channel context
* @IEEE80211_CHANCTX_CHANGE_WIDTH: The channel width changed
* @IEEE80211_CHANCTX_CHANGE_RX_CHAINS: The number of RX chains changed
* @IEEE80211_CHANCTX_CHANGE_RADAR: radar detection flag changed
* @IEEE80211_CHANCTX_CHANGE_CHANNEL: switched to another operating channel,
* this is used only with channel switching with CSA
* @IEEE80211_CHANCTX_CHANGE_MIN_WIDTH: The min required channel width changed
*/
enum ieee80211_chanctx_change {
IEEE80211_CHANCTX_CHANGE_WIDTH = BIT(0),
IEEE80211_CHANCTX_CHANGE_RX_CHAINS = BIT(1),
IEEE80211_CHANCTX_CHANGE_RADAR = BIT(2),
IEEE80211_CHANCTX_CHANGE_CHANNEL = BIT(3),
IEEE80211_CHANCTX_CHANGE_MIN_WIDTH = BIT(4),
};
/**
* struct ieee80211_chanctx_conf - channel context that vifs may be tuned to
*
* This is the driver-visible part. The ieee80211_chanctx
* that contains it is visible in mac80211 only.
*
* @def: the channel definition
* @min_def: the minimum channel definition currently required.
* @rx_chains_static: The number of RX chains that must always be
* active on the channel to receive MIMO transmissions
* @rx_chains_dynamic: The number of RX chains that must be enabled
* after RTS/CTS handshake to receive SMPS MIMO transmissions;
* this will always be >= @rx_chains_static.
* @radar_enabled: whether radar detection is enabled on this channel.
* @drv_priv: data area for driver use, will always be aligned to
* sizeof(void *), size is determined in hw information.
*/
struct ieee80211_chanctx_conf {
struct cfg80211_chan_def def;
struct cfg80211_chan_def min_def;
u8 rx_chains_static, rx_chains_dynamic;
bool radar_enabled;
u8 drv_priv[] __aligned(sizeof(void *));
};
/**
* enum ieee80211_chanctx_switch_mode - channel context switch mode
* @CHANCTX_SWMODE_REASSIGN_VIF: Both old and new contexts already
* exist (and will continue to exist), but the virtual interface
* needs to be switched from one to the other.
* @CHANCTX_SWMODE_SWAP_CONTEXTS: The old context exists but will stop
* to exist with this call, the new context doesn't exist but
* will be active after this call, the virtual interface switches
* from the old to the new (note that the driver may of course
* implement this as an on-the-fly chandef switch of the existing
* hardware context, but the mac80211 pointer for the old context
* will cease to exist and only the new one will later be used
* for changes/removal.)
*/
enum ieee80211_chanctx_switch_mode {
CHANCTX_SWMODE_REASSIGN_VIF,
CHANCTX_SWMODE_SWAP_CONTEXTS,
};
/**
* struct ieee80211_vif_chanctx_switch - vif chanctx switch information
*
* This is structure is used to pass information about a vif that
* needs to switch from one chanctx to another. The
* &ieee80211_chanctx_switch_mode defines how the switch should be
* done.
*
* @vif: the vif that should be switched from old_ctx to new_ctx
* @old_ctx: the old context to which the vif was assigned
* @new_ctx: the new context to which the vif must be assigned
*/
struct ieee80211_vif_chanctx_switch {
struct ieee80211_vif *vif;
struct ieee80211_chanctx_conf *old_ctx;
struct ieee80211_chanctx_conf *new_ctx;
};
/**
* enum ieee80211_bss_change - BSS change notification flags
*
* These flags are used with the bss_info_changed() callback
* to indicate which BSS parameter changed.
*
* @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
* also implies a change in the AID.
* @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
* @BSS_CHANGED_ERP_PREAMBLE: preamble changed
* @BSS_CHANGED_ERP_SLOT: slot timing changed
* @BSS_CHANGED_HT: 802.11n parameters changed
* @BSS_CHANGED_BASIC_RATES: Basic rateset changed
* @BSS_CHANGED_BEACON_INT: Beacon interval changed
* @BSS_CHANGED_BSSID: BSSID changed, for whatever
* reason (IBSS and managed mode)
* @BSS_CHANGED_BEACON: Beacon data changed, retrieve
* new beacon (beaconing modes)
* @BSS_CHANGED_BEACON_ENABLED: Beaconing should be
* enabled/disabled (beaconing modes)
* @BSS_CHANGED_CQM: Connection quality monitor config changed
* @BSS_CHANGED_IBSS: IBSS join status changed
* @BSS_CHANGED_ARP_FILTER: Hardware ARP filter address list or state changed.
* @BSS_CHANGED_QOS: QoS for this association was enabled/disabled. Note
* that it is only ever disabled for station mode.
* @BSS_CHANGED_IDLE: Idle changed for this BSS/interface.
* @BSS_CHANGED_SSID: SSID changed for this BSS (AP and IBSS mode)
* @BSS_CHANGED_AP_PROBE_RESP: Probe Response changed for this BSS (AP mode)
* @BSS_CHANGED_PS: PS changed for this BSS (STA mode)
* @BSS_CHANGED_TXPOWER: TX power setting changed for this interface
* @BSS_CHANGED_P2P_PS: P2P powersave settings (CTWindow, opportunistic PS)
* changed
* @BSS_CHANGED_BEACON_INFO: Data from the AP's beacon became available:
* currently dtim_period only is under consideration.
* @BSS_CHANGED_BANDWIDTH: The bandwidth used by this interface changed,
* note that this is only called when it changes after the channel
* context had been assigned.
* @BSS_CHANGED_OCB: OCB join status changed
* @BSS_CHANGED_MU_GROUPS: VHT MU-MIMO group id or user position changed
* @BSS_CHANGED_KEEP_ALIVE: keep alive options (idle period or protected
* keep alive) changed.
* @BSS_CHANGED_MCAST_RATE: Multicast Rate setting changed for this interface
* @BSS_CHANGED_FTM_RESPONDER: fine timing measurement request responder
* functionality changed for this BSS (AP mode).
* @BSS_CHANGED_TWT: TWT status changed
* @BSS_CHANGED_HE_OBSS_PD: OBSS Packet Detection status changed.
* @BSS_CHANGED_HE_BSS_COLOR: BSS Color has changed
* @BSS_CHANGED_FILS_DISCOVERY: FILS discovery status changed.
* @BSS_CHANGED_UNSOL_BCAST_PROBE_RESP: Unsolicited broadcast probe response
* status changed.
*
*/
enum ieee80211_bss_change {
BSS_CHANGED_ASSOC = 1<<0,
BSS_CHANGED_ERP_CTS_PROT = 1<<1,
BSS_CHANGED_ERP_PREAMBLE = 1<<2,
BSS_CHANGED_ERP_SLOT = 1<<3,
BSS_CHANGED_HT = 1<<4,
BSS_CHANGED_BASIC_RATES = 1<<5,
BSS_CHANGED_BEACON_INT = 1<<6,
BSS_CHANGED_BSSID = 1<<7,
BSS_CHANGED_BEACON = 1<<8,
BSS_CHANGED_BEACON_ENABLED = 1<<9,
BSS_CHANGED_CQM = 1<<10,
BSS_CHANGED_IBSS = 1<<11,
BSS_CHANGED_ARP_FILTER = 1<<12,
BSS_CHANGED_QOS = 1<<13,
BSS_CHANGED_IDLE = 1<<14,
BSS_CHANGED_SSID = 1<<15,
BSS_CHANGED_AP_PROBE_RESP = 1<<16,
BSS_CHANGED_PS = 1<<17,
BSS_CHANGED_TXPOWER = 1<<18,
BSS_CHANGED_P2P_PS = 1<<19,
BSS_CHANGED_BEACON_INFO = 1<<20,
BSS_CHANGED_BANDWIDTH = 1<<21,
BSS_CHANGED_OCB = 1<<22,
BSS_CHANGED_MU_GROUPS = 1<<23,
BSS_CHANGED_KEEP_ALIVE = 1<<24,
BSS_CHANGED_MCAST_RATE = 1<<25,
BSS_CHANGED_FTM_RESPONDER = 1<<26,
BSS_CHANGED_TWT = 1<<27,
BSS_CHANGED_HE_OBSS_PD = 1<<28,
BSS_CHANGED_HE_BSS_COLOR = 1<<29,
BSS_CHANGED_FILS_DISCOVERY = 1<<30,
BSS_CHANGED_UNSOL_BCAST_PROBE_RESP = 1<<31,
/* when adding here, make sure to change ieee80211_reconfig */
};
/*
* The maximum number of IPv4 addresses listed for ARP filtering. If the number
* of addresses for an interface increase beyond this value, hardware ARP
* filtering will be disabled.
*/
#define IEEE80211_BSS_ARP_ADDR_LIST_LEN 4
/**
* enum ieee80211_event_type - event to be notified to the low level driver
* @RSSI_EVENT: AP's rssi crossed the a threshold set by the driver.
* @MLME_EVENT: event related to MLME
* @BAR_RX_EVENT: a BAR was received
* @BA_FRAME_TIMEOUT: Frames were released from the reordering buffer because
* they timed out. This won't be called for each frame released, but only
* once each time the timeout triggers.
*/
enum ieee80211_event_type {
RSSI_EVENT,
MLME_EVENT,
BAR_RX_EVENT,
BA_FRAME_TIMEOUT,
};
/**
* enum ieee80211_rssi_event_data - relevant when event type is %RSSI_EVENT
* @RSSI_EVENT_HIGH: AP's rssi went below the threshold set by the driver.
* @RSSI_EVENT_LOW: AP's rssi went above the threshold set by the driver.
*/
enum ieee80211_rssi_event_data {
RSSI_EVENT_HIGH,
RSSI_EVENT_LOW,
};
/**
* struct ieee80211_rssi_event - data attached to an %RSSI_EVENT
* @data: See &enum ieee80211_rssi_event_data
*/
struct ieee80211_rssi_event {
enum ieee80211_rssi_event_data data;
};
/**
* enum ieee80211_mlme_event_data - relevant when event type is %MLME_EVENT
* @AUTH_EVENT: the MLME operation is authentication
* @ASSOC_EVENT: the MLME operation is association
* @DEAUTH_RX_EVENT: deauth received..
* @DEAUTH_TX_EVENT: deauth sent.
*/
enum ieee80211_mlme_event_data {
AUTH_EVENT,
ASSOC_EVENT,
DEAUTH_RX_EVENT,
DEAUTH_TX_EVENT,
};
/**
* enum ieee80211_mlme_event_status - relevant when event type is %MLME_EVENT
* @MLME_SUCCESS: the MLME operation completed successfully.
* @MLME_DENIED: the MLME operation was denied by the peer.
* @MLME_TIMEOUT: the MLME operation timed out.
*/
enum ieee80211_mlme_event_status {
MLME_SUCCESS,
MLME_DENIED,
MLME_TIMEOUT,
};
/**
* struct ieee80211_mlme_event - data attached to an %MLME_EVENT
* @data: See &enum ieee80211_mlme_event_data
* @status: See &enum ieee80211_mlme_event_status
* @reason: the reason code if applicable
*/
struct ieee80211_mlme_event {
enum ieee80211_mlme_event_data data;
enum ieee80211_mlme_event_status status;
u16 reason;
};
/**
* struct ieee80211_ba_event - data attached for BlockAck related events
* @sta: pointer to the &ieee80211_sta to which this event relates
* @tid: the tid
* @ssn: the starting sequence number (for %BAR_RX_EVENT)
*/
struct ieee80211_ba_event {
struct ieee80211_sta *sta;
u16 tid;
u16 ssn;
};
/**
* struct ieee80211_event - event to be sent to the driver
* @type: The event itself. See &enum ieee80211_event_type.
* @rssi: relevant if &type is %RSSI_EVENT
* @mlme: relevant if &type is %AUTH_EVENT
* @ba: relevant if &type is %BAR_RX_EVENT or %BA_FRAME_TIMEOUT
* @u:union holding the fields above
*/
struct ieee80211_event {
enum ieee80211_event_type type;
union {
struct ieee80211_rssi_event rssi;
struct ieee80211_mlme_event mlme;
struct ieee80211_ba_event ba;
} u;
};
/**
* struct ieee80211_mu_group_data - STA's VHT MU-MIMO group data
*
* This structure describes the group id data of VHT MU-MIMO
*
* @membership: 64 bits array - a bit is set if station is member of the group
* @position: 2 bits per group id indicating the position in the group
*/
struct ieee80211_mu_group_data {
u8 membership[WLAN_MEMBERSHIP_LEN];
u8 position[WLAN_USER_POSITION_LEN];
};
/**
* struct ieee80211_ftm_responder_params - FTM responder parameters
*
* @lci: LCI subelement content
* @civicloc: CIVIC location subelement content
* @lci_len: LCI data length
* @civicloc_len: Civic data length
*/
struct ieee80211_ftm_responder_params {
const u8 *lci;
const u8 *civicloc;
size_t lci_len;
size_t civicloc_len;
};
/**
* struct ieee80211_fils_discovery - FILS discovery parameters from
* IEEE Std 802.11ai-2016, Annex C.3 MIB detail.
*
* @min_interval: Minimum packet interval in TUs (0 - 10000)
* @max_interval: Maximum packet interval in TUs (0 - 10000)
*/
struct ieee80211_fils_discovery {
u32 min_interval;
u32 max_interval;
};
/**
* struct ieee80211_bss_conf - holds the BSS's changing parameters
*
* This structure keeps information about a BSS (and an association
* to that BSS) that can change during the lifetime of the BSS.
*
* @htc_trig_based_pkt_ext: default PE in 4us units, if BSS supports HE
* @multi_sta_back_32bit: supports BA bitmap of 32-bits in Multi-STA BACK
* @uora_exists: is the UORA element advertised by AP
* @ack_enabled: indicates support to receive a multi-TID that solicits either
* ACK, BACK or both
* @uora_ocw_range: UORA element's OCW Range field
* @frame_time_rts_th: HE duration RTS threshold, in units of 32us
* @he_support: does this BSS support HE
* @twt_requester: does this BSS support TWT requester (relevant for managed
* mode only, set if the AP advertises TWT responder role)
* @twt_responder: does this BSS support TWT requester (relevant for managed
* mode only, set if the AP advertises TWT responder role)
* @twt_protected: does this BSS support protected TWT frames
* @assoc: association status
* @ibss_joined: indicates whether this station is part of an IBSS
* or not
* @ibss_creator: indicates if a new IBSS network is being created
* @aid: association ID number, valid only when @assoc is true
* @use_cts_prot: use CTS protection
* @use_short_preamble: use 802.11b short preamble
* @use_short_slot: use short slot time (only relevant for ERP)
* @dtim_period: num of beacons before the next DTIM, for beaconing,
* valid in station mode only if after the driver was notified
* with the %BSS_CHANGED_BEACON_INFO flag, will be non-zero then.
* @sync_tsf: last beacon's/probe response's TSF timestamp (could be old
* as it may have been received during scanning long ago). If the
* HW flag %IEEE80211_HW_TIMING_BEACON_ONLY is set, then this can
* only come from a beacon, but might not become valid until after
* association when a beacon is received (which is notified with the
* %BSS_CHANGED_DTIM flag.). See also sync_dtim_count important notice.
* @sync_device_ts: the device timestamp corresponding to the sync_tsf,
* the driver/device can use this to calculate synchronisation
* (see @sync_tsf). See also sync_dtim_count important notice.
* @sync_dtim_count: Only valid when %IEEE80211_HW_TIMING_BEACON_ONLY
* is requested, see @sync_tsf/@sync_device_ts.
* IMPORTANT: These three sync_* parameters would possibly be out of sync
* by the time the driver will use them. The synchronized view is currently
* guaranteed only in certain callbacks.
* @beacon_int: beacon interval
* @assoc_capability: capabilities taken from assoc resp
* @basic_rates: bitmap of basic rates, each bit stands for an
* index into the rate table configured by the driver in
* the current band.
* @beacon_rate: associated AP's beacon TX rate
* @mcast_rate: per-band multicast rate index + 1 (0: disabled)
* @bssid: The BSSID for this BSS
* @enable_beacon: whether beaconing should be enabled or not
* @chandef: Channel definition for this BSS -- the hardware might be
* configured a higher bandwidth than this BSS uses, for example.
* @mu_group: VHT MU-MIMO group membership data
* @ht_operation_mode: HT operation mode like in &struct ieee80211_ht_operation.
* This field is only valid when the channel is a wide HT/VHT channel.
* Note that with TDLS this can be the case (channel is HT, protection must
* be used from this field) even when the BSS association isn't using HT.
* @cqm_rssi_thold: Connection quality monitor RSSI threshold, a zero value
* implies disabled. As with the cfg80211 callback, a change here should
* cause an event to be sent indicating where the current value is in
* relation to the newly configured threshold.
* @cqm_rssi_low: Connection quality monitor RSSI lower threshold, a zero value
* implies disabled. This is an alternative mechanism to the single
* threshold event and can't be enabled simultaneously with it.
* @cqm_rssi_high: Connection quality monitor RSSI upper threshold.
* @cqm_rssi_hyst: Connection quality monitor RSSI hysteresis
* @arp_addr_list: List of IPv4 addresses for hardware ARP filtering. The
* may filter ARP queries targeted for other addresses than listed here.
* The driver must allow ARP queries targeted for all address listed here
* to pass through. An empty list implies no ARP queries need to pass.
* @arp_addr_cnt: Number of addresses currently on the list. Note that this
* may be larger than %IEEE80211_BSS_ARP_ADDR_LIST_LEN (the arp_addr_list
* array size), it's up to the driver what to do in that case.
* @qos: This is a QoS-enabled BSS.
* @idle: This interface is idle. There's also a global idle flag in the
* hardware config which may be more appropriate depending on what
* your driver/device needs to do.
* @ps: power-save mode (STA only). This flag is NOT affected by
* offchannel/dynamic_ps operations.
* @ssid: The SSID of the current vif. Valid in AP and IBSS mode.
* @ssid_len: Length of SSID given in @ssid.
* @hidden_ssid: The SSID of the current vif is hidden. Only valid in AP-mode.
* @txpower: TX power in dBm. INT_MIN means not configured.
* @txpower_type: TX power adjustment used to control per packet Transmit
* Power Control (TPC) in lower driver for the current vif. In particular
* TPC is enabled if value passed in %txpower_type is
* NL80211_TX_POWER_LIMITED (allow using less than specified from
* userspace), whereas TPC is disabled if %txpower_type is set to
* NL80211_TX_POWER_FIXED (use value configured from userspace)
* @p2p_noa_attr: P2P NoA attribute for P2P powersave
* @allow_p2p_go_ps: indication for AP or P2P GO interface, whether it's allowed
* to use P2P PS mechanism or not. AP/P2P GO is not allowed to use P2P PS
* if it has associated clients without P2P PS support.
* @max_idle_period: the time period during which the station can refrain from
* transmitting frames to its associated AP without being disassociated.
* In units of 1000 TUs. Zero value indicates that the AP did not include
* a (valid) BSS Max Idle Period Element.
* @protected_keep_alive: if set, indicates that the station should send an RSN
* protected frame to the AP to reset the idle timer at the AP for the
* station.
* @ftm_responder: whether to enable or disable fine timing measurement FTM
* responder functionality.
* @ftmr_params: configurable lci/civic parameter when enabling FTM responder.
* @nontransmitted: this BSS is a nontransmitted BSS profile
* @transmitter_bssid: the address of transmitter AP
* @bssid_index: index inside the multiple BSSID set
* @bssid_indicator: 2^bssid_indicator is the maximum number of APs in set
* @ema_ap: AP supports enhancements of discovery and advertisement of
* nontransmitted BSSIDs
* @profile_periodicity: the least number of beacon frames need to be received
* in order to discover all the nontransmitted BSSIDs in the set.
* @he_oper: HE operation information of the AP we are connected to
* @he_obss_pd: OBSS Packet Detection parameters.
* @he_bss_color: BSS coloring settings, if BSS supports HE
* @fils_discovery: FILS discovery configuration
* @unsol_bcast_probe_resp_interval: Unsolicited broadcast probe response
* interval.
* @s1g: BSS is S1G BSS (affects Association Request format).
* @beacon_tx_rate: The configured beacon transmit rate that needs to be passed
* to driver when rate control is offloaded to firmware.
*/
struct ieee80211_bss_conf {
const u8 *bssid;
u8 htc_trig_based_pkt_ext;
bool multi_sta_back_32bit;
bool uora_exists;
bool ack_enabled;
u8 uora_ocw_range;
u16 frame_time_rts_th;
bool he_support;
bool twt_requester;
bool twt_responder;
bool twt_protected;
/* association related data */
bool assoc, ibss_joined;
bool ibss_creator;
u16 aid;
/* erp related data */
bool use_cts_prot;
bool use_short_preamble;
bool use_short_slot;
bool enable_beacon;
u8 dtim_period;
u16 beacon_int;
u16 assoc_capability;
u64 sync_tsf;
u32 sync_device_ts;
u8 sync_dtim_count;
u32 basic_rates;
struct ieee80211_rate *beacon_rate;
int mcast_rate[NUM_NL80211_BANDS];
u16 ht_operation_mode;
s32 cqm_rssi_thold;
u32 cqm_rssi_hyst;
s32 cqm_rssi_low;
s32 cqm_rssi_high;
struct cfg80211_chan_def chandef;
struct ieee80211_mu_group_data mu_group;
__be32 arp_addr_list[IEEE80211_BSS_ARP_ADDR_LIST_LEN];
int arp_addr_cnt;
bool qos;
bool idle;
bool ps;
u8 ssid[IEEE80211_MAX_SSID_LEN];
size_t ssid_len;
bool hidden_ssid;
int txpower;
enum nl80211_tx_power_setting txpower_type;
struct ieee80211_p2p_noa_attr p2p_noa_attr;
bool allow_p2p_go_ps;
u16 max_idle_period;
bool protected_keep_alive;
bool ftm_responder;
struct ieee80211_ftm_responder_params *ftmr_params;
/* Multiple BSSID data */
bool nontransmitted;
u8 transmitter_bssid[ETH_ALEN];
u8 bssid_index;
u8 bssid_indicator;
bool ema_ap;
u8 profile_periodicity;
struct {
u32 params;
u16 nss_set;
} he_oper;
struct ieee80211_he_obss_pd he_obss_pd;
struct cfg80211_he_bss_color he_bss_color;
struct ieee80211_fils_discovery fils_discovery;
u32 unsol_bcast_probe_resp_interval;
bool s1g;
struct cfg80211_bitrate_mask beacon_tx_rate;
};
/**
* enum mac80211_tx_info_flags - flags to describe transmission information/status
*
* These flags are used with the @flags member of &ieee80211_tx_info.
*
* @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame.
* @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
* number to this frame, taking care of not overwriting the fragment
* number and increasing the sequence number only when the
* IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly
* assign sequence numbers to QoS-data frames but cannot do so correctly
* for non-QoS-data and management frames because beacons need them from
* that counter as well and mac80211 cannot guarantee proper sequencing.
* If this flag is set, the driver should instruct the hardware to
* assign a sequence number to the frame or assign one itself. Cf. IEEE
* 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
* beacons and always be clear for frames without a sequence number field.
* @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
* @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
* station
* @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
* @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
* @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
* @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211.
* @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
* because the destination STA was in powersave mode. Note that to
* avoid race conditions, the filter must be set by the hardware or
* firmware upon receiving a frame that indicates that the station
* went to sleep (must be done on device to filter frames already on
* the queue) and may only be unset after mac80211 gives the OK for
* that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above),
* since only then is it guaranteed that no more frames are in the
* hardware queue.
* @IEEE80211_TX_STAT_ACK: Frame was acknowledged
* @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
* is for the whole aggregation.
* @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
* so consider using block ack request (BAR).
* @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
* set by rate control algorithms to indicate probe rate, will
* be cleared for fragmented frames (except on the last fragment)
* @IEEE80211_TX_INTFL_OFFCHAN_TX_OK: Internal to mac80211. Used to indicate
* that a frame can be transmitted while the queues are stopped for
* off-channel operation.
* @IEEE80211_TX_CTL_HW_80211_ENCAP: This frame uses hardware encapsulation
* (header conversion)
* @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211,
* used to indicate that a frame was already retried due to PS
* @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211,
* used to indicate frame should not be encrypted
* @IEEE80211_TX_CTL_NO_PS_BUFFER: This frame is a response to a poll
* frame (PS-Poll or uAPSD) or a non-bufferable MMPDU and must
* be sent although the station is in powersave mode.
* @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the
* transmit function after the current frame, this can be used
* by drivers to kick the DMA queue only if unset or when the
* queue gets full.
* @IEEE80211_TX_INTFL_RETRANSMISSION: This frame is being retransmitted
* after TX status because the destination was asleep, it must not
* be modified again (no seqno assignment, crypto, etc.)
* @IEEE80211_TX_INTFL_MLME_CONN_TX: This frame was transmitted by the MLME
* code for connection establishment, this indicates that its status
* should kick the MLME state machine.
* @IEEE80211_TX_INTFL_NL80211_FRAME_TX: Frame was requested through nl80211
* MLME command (internal to mac80211 to figure out whether to send TX
* status to user space)
* @IEEE80211_TX_CTL_LDPC: tells the driver to use LDPC for this frame
* @IEEE80211_TX_CTL_STBC: Enables Space-Time Block Coding (STBC) for this
* frame and selects the maximum number of streams that it can use.
* @IEEE80211_TX_CTL_TX_OFFCHAN: Marks this packet to be transmitted on
* the off-channel channel when a remain-on-channel offload is done
* in hardware -- normal packets still flow and are expected to be
* handled properly by the device.
* @IEEE80211_TX_INTFL_TKIP_MIC_FAILURE: Marks this packet to be used for TKIP
* testing. It will be sent out with incorrect Michael MIC key to allow
* TKIP countermeasures to be tested.
* @IEEE80211_TX_CTL_NO_CCK_RATE: This frame will be sent at non CCK rate.
* This flag is actually used for management frame especially for P2P
* frames not being sent at CCK rate in 2GHz band.
* @IEEE80211_TX_STATUS_EOSP: This packet marks the end of service period,
* when its status is reported the service period ends. For frames in
* an SP that mac80211 transmits, it is already set; for driver frames
* the driver may set this flag. It is also used to do the same for
* PS-Poll responses.
* @IEEE80211_TX_CTL_USE_MINRATE: This frame will be sent at lowest rate.
* This flag is used to send nullfunc frame at minimum rate when
* the nullfunc is used for connection monitoring purpose.
* @IEEE80211_TX_CTL_DONTFRAG: Don't fragment this packet even if it
* would be fragmented by size (this is optional, only used for
* monitor injection).
* @IEEE80211_TX_STAT_NOACK_TRANSMITTED: A frame that was marked with
* IEEE80211_TX_CTL_NO_ACK has been successfully transmitted without
* any errors (like issues specific to the driver/HW).
* This flag must not be set for frames that don't request no-ack
* behaviour with IEEE80211_TX_CTL_NO_ACK.
*
* Note: If you have to add new flags to the enumeration, then don't
* forget to update %IEEE80211_TX_TEMPORARY_FLAGS when necessary.
*/
enum mac80211_tx_info_flags {
IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1),
IEEE80211_TX_CTL_NO_ACK = BIT(2),
IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3),
IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4),
IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5),
IEEE80211_TX_CTL_AMPDU = BIT(6),
IEEE80211_TX_CTL_INJECTED = BIT(7),
IEEE80211_TX_STAT_TX_FILTERED = BIT(8),
IEEE80211_TX_STAT_ACK = BIT(9),
IEEE80211_TX_STAT_AMPDU = BIT(10),
IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11),
IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12),
IEEE80211_TX_INTFL_OFFCHAN_TX_OK = BIT(13),
IEEE80211_TX_CTL_HW_80211_ENCAP = BIT(14),
IEEE80211_TX_INTFL_RETRIED = BIT(15),
IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16),
IEEE80211_TX_CTL_NO_PS_BUFFER = BIT(17),
IEEE80211_TX_CTL_MORE_FRAMES = BIT(18),
IEEE80211_TX_INTFL_RETRANSMISSION = BIT(19),
IEEE80211_TX_INTFL_MLME_CONN_TX = BIT(20),
IEEE80211_TX_INTFL_NL80211_FRAME_TX = BIT(21),
IEEE80211_TX_CTL_LDPC = BIT(22),
IEEE80211_TX_CTL_STBC = BIT(23) | BIT(24),
IEEE80211_TX_CTL_TX_OFFCHAN = BIT(25),
IEEE80211_TX_INTFL_TKIP_MIC_FAILURE = BIT(26),
IEEE80211_TX_CTL_NO_CCK_RATE = BIT(27),
IEEE80211_TX_STATUS_EOSP = BIT(28),
IEEE80211_TX_CTL_USE_MINRATE = BIT(29),
IEEE80211_TX_CTL_DONTFRAG = BIT(30),
IEEE80211_TX_STAT_NOACK_TRANSMITTED = BIT(31),
};
#define IEEE80211_TX_CTL_STBC_SHIFT 23
#define IEEE80211_TX_RC_S1G_MCS IEEE80211_TX_RC_VHT_MCS
/**
* enum mac80211_tx_control_flags - flags to describe transmit control
*
* @IEEE80211_TX_CTRL_PORT_CTRL_PROTO: this frame is a port control
* protocol frame (e.g. EAP)
* @IEEE80211_TX_CTRL_PS_RESPONSE: This frame is a response to a poll
* frame (PS-Poll or uAPSD).
* @IEEE80211_TX_CTRL_RATE_INJECT: This frame is injected with rate information
* @IEEE80211_TX_CTRL_AMSDU: This frame is an A-MSDU frame
* @IEEE80211_TX_CTRL_FAST_XMIT: This frame is going through the fast_xmit path
* @IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP: This frame skips mesh path lookup
* @IEEE80211_TX_INTCFL_NEED_TXPROCESSING: completely internal to mac80211,
* used to indicate that a pending frame requires TX processing before
* it can be sent out.
* @IEEE80211_TX_CTRL_NO_SEQNO: Do not overwrite the sequence number that
* has already been assigned to this frame.
*
* These flags are used in tx_info->control.flags.
*/
enum mac80211_tx_control_flags {
IEEE80211_TX_CTRL_PORT_CTRL_PROTO = BIT(0),
IEEE80211_TX_CTRL_PS_RESPONSE = BIT(1),
IEEE80211_TX_CTRL_RATE_INJECT = BIT(2),
IEEE80211_TX_CTRL_AMSDU = BIT(3),
IEEE80211_TX_CTRL_FAST_XMIT = BIT(4),
IEEE80211_TX_CTRL_SKIP_MPATH_LOOKUP = BIT(5),
IEEE80211_TX_INTCFL_NEED_TXPROCESSING = BIT(6),
IEEE80211_TX_CTRL_NO_SEQNO = BIT(7),
};
/*
* This definition is used as a mask to clear all temporary flags, which are
* set by the tx handlers for each transmission attempt by the mac80211 stack.
*/
#define IEEE80211_TX_TEMPORARY_FLAGS (IEEE80211_TX_CTL_NO_ACK | \
IEEE80211_TX_CTL_CLEAR_PS_FILT | IEEE80211_TX_CTL_FIRST_FRAGMENT | \
IEEE80211_TX_CTL_SEND_AFTER_DTIM | IEEE80211_TX_CTL_AMPDU | \
IEEE80211_TX_STAT_TX_FILTERED | IEEE80211_TX_STAT_ACK | \
IEEE80211_TX_STAT_AMPDU | IEEE80211_TX_STAT_AMPDU_NO_BACK | \
IEEE80211_TX_CTL_RATE_CTRL_PROBE | IEEE80211_TX_CTL_NO_PS_BUFFER | \
IEEE80211_TX_CTL_MORE_FRAMES | IEEE80211_TX_CTL_LDPC | \
IEEE80211_TX_CTL_STBC | IEEE80211_TX_STATUS_EOSP)
/**
* enum mac80211_rate_control_flags - per-rate flags set by the
* Rate Control algorithm.
*
* These flags are set by the Rate control algorithm for each rate during tx,
* in the @flags member of struct ieee80211_tx_rate.
*
* @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.
* @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.
* This is set if the current BSS requires ERP protection.
* @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
* @IEEE80211_TX_RC_MCS: HT rate.
* @IEEE80211_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is split
* into a higher 4 bits (Nss) and lower 4 bits (MCS number)
* @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in
* Greenfield mode.
* @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz.
* @IEEE80211_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission
* @IEEE80211_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission
* (80+80 isn't supported yet)
* @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the
* adjacent 20 MHz channels, if the current channel type is
* NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
* @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate.
*/
enum mac80211_rate_control_flags {
IEEE80211_TX_RC_USE_RTS_CTS = BIT(0),
IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1),
IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2),
/* rate index is an HT/VHT MCS instead of an index */
IEEE80211_TX_RC_MCS = BIT(3),
IEEE80211_TX_RC_GREEN_FIELD = BIT(4),
IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5),
IEEE80211_TX_RC_DUP_DATA = BIT(6),
IEEE80211_TX_RC_SHORT_GI = BIT(7),
IEEE80211_TX_RC_VHT_MCS = BIT(8),
IEEE80211_TX_RC_80_MHZ_WIDTH = BIT(9),
IEEE80211_TX_RC_160_MHZ_WIDTH = BIT(10),
};
/* there are 40 bytes if you don't need the rateset to be kept */
#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40
/* if you do need the rateset, then you have less space */
#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24
/* maximum number of rate stages */
#define IEEE80211_TX_MAX_RATES 4
/* maximum number of rate table entries */
#define IEEE80211_TX_RATE_TABLE_SIZE 4
/**
* struct ieee80211_tx_rate - rate selection/status
*
* @idx: rate index to attempt to send with
* @flags: rate control flags (&enum mac80211_rate_control_flags)
* @count: number of tries in this rate before going to the next rate
*
* A value of -1 for @idx indicates an invalid rate and, if used
* in an array of retry rates, that no more rates should be tried.
*
* When used for transmit status reporting, the driver should
* always report the rate along with the flags it used.
*
* &struct ieee80211_tx_info contains an array of these structs
* in the control information, and it will be filled by the rate
* control algorithm according to what should be sent. For example,
* if this array contains, in the format { <idx>, <count> } the
* information::
*
* { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 }
*
* then this means that the frame should be transmitted
* up to twice at rate 3, up to twice at rate 2, and up to four
* times at rate 1 if it doesn't get acknowledged. Say it gets
* acknowledged by the peer after the fifth attempt, the status
* information should then contain::
*
* { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ...
*
* since it was transmitted twice at rate 3, twice at rate 2
* and once at rate 1 after which we received an acknowledgement.
*/
struct ieee80211_tx_rate {
s8 idx;
u16 count:5,
flags:11;
} __packed;
#define IEEE80211_MAX_TX_RETRY 31
static inline void ieee80211_rate_set_vht(struct ieee80211_tx_rate *rate,
u8 mcs, u8 nss)
{
WARN_ON(mcs & ~0xF);
WARN_ON((nss - 1) & ~0x7);
rate->idx = ((nss - 1) << 4) | mcs;
}
static inline u8
ieee80211_rate_get_vht_mcs(const struct ieee80211_tx_rate *rate)
{
return rate->idx & 0xF;
}
static inline u8
ieee80211_rate_get_vht_nss(const struct ieee80211_tx_rate *rate)
{
return (rate->idx >> 4) + 1;
}
/**