2360 lines
88 KiB
C
2360 lines
88 KiB
C
/*
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* mac80211 <-> driver interface
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*
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* Copyright 2002-2005, Devicescape Software, Inc.
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* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
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* Copyright 2007-2008 Johannes Berg <johannes@sipsolutions.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef MAC80211_H
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#define MAC80211_H
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#include <linux/kernel.h>
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#include <linux/if_ether.h>
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#include <linux/skbuff.h>
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#include <linux/wireless.h>
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#include <linux/device.h>
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#include <linux/ieee80211.h>
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#include <net/cfg80211.h>
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/**
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* DOC: Introduction
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*
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* mac80211 is the Linux stack for 802.11 hardware that implements
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* only partial functionality in hard- or firmware. This document
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* defines the interface between mac80211 and low-level hardware
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* drivers.
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*/
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/**
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* DOC: Calling mac80211 from interrupts
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*
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* Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
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* called in hardware interrupt context. The low-level driver must not call any
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* other functions in hardware interrupt context. If there is a need for such
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* call, the low-level driver should first ACK the interrupt and perform the
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* IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
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* tasklet function.
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*
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* NOTE: If the driver opts to use the _irqsafe() functions, it may not also
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* use the non-IRQ-safe functions!
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*/
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/**
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* DOC: Warning
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*
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* If you're reading this document and not the header file itself, it will
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* be incomplete because not all documentation has been converted yet.
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*/
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/**
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* DOC: Frame format
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*
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* As a general rule, when frames are passed between mac80211 and the driver,
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* they start with the IEEE 802.11 header and include the same octets that are
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* sent over the air except for the FCS which should be calculated by the
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* hardware.
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*
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* There are, however, various exceptions to this rule for advanced features:
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*
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* The first exception is for hardware encryption and decryption offload
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* where the IV/ICV may or may not be generated in hardware.
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*
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* Secondly, when the hardware handles fragmentation, the frame handed to
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* the driver from mac80211 is the MSDU, not the MPDU.
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*
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* Finally, for received frames, the driver is able to indicate that it has
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* filled a radiotap header and put that in front of the frame; if it does
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* not do so then mac80211 may add this under certain circumstances.
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*/
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/**
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* DOC: mac80211 workqueue
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*
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* mac80211 provides its own workqueue for drivers and internal mac80211 use.
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* The workqueue is a single threaded workqueue and can only be accessed by
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* helpers for sanity checking. Drivers must ensure all work added onto the
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* mac80211 workqueue should be cancelled on the driver stop() callback.
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*
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* mac80211 will flushed the workqueue upon interface removal and during
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* suspend.
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*
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* All work performed on the mac80211 workqueue must not acquire the RTNL lock.
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*
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*/
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/**
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* enum ieee80211_max_queues - maximum number of queues
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*
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* @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
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*/
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enum ieee80211_max_queues {
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IEEE80211_MAX_QUEUES = 4,
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};
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/**
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* struct ieee80211_tx_queue_params - transmit queue configuration
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*
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* The information provided in this structure is required for QoS
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* transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
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*
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* @aifs: arbitration interframe space [0..255]
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* @cw_min: minimum contention window [a value of the form
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* 2^n-1 in the range 1..32767]
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* @cw_max: maximum contention window [like @cw_min]
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* @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
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*/
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struct ieee80211_tx_queue_params {
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u16 txop;
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u16 cw_min;
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u16 cw_max;
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u8 aifs;
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};
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/**
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* struct ieee80211_tx_queue_stats - transmit queue statistics
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*
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* @len: number of packets in queue
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* @limit: queue length limit
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* @count: number of frames sent
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*/
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struct ieee80211_tx_queue_stats {
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unsigned int len;
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unsigned int limit;
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unsigned int count;
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};
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struct ieee80211_low_level_stats {
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unsigned int dot11ACKFailureCount;
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unsigned int dot11RTSFailureCount;
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unsigned int dot11FCSErrorCount;
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unsigned int dot11RTSSuccessCount;
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};
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/**
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* enum ieee80211_bss_change - BSS change notification flags
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*
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* These flags are used with the bss_info_changed() callback
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* to indicate which BSS parameter changed.
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*
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* @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
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* also implies a change in the AID.
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* @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
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* @BSS_CHANGED_ERP_PREAMBLE: preamble changed
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* @BSS_CHANGED_ERP_SLOT: slot timing changed
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* @BSS_CHANGED_HT: 802.11n parameters changed
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* @BSS_CHANGED_BASIC_RATES: Basic rateset changed
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* @BSS_CHANGED_BEACON_INT: Beacon interval changed
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* @BSS_CHANGED_BSSID: BSSID changed, for whatever
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* reason (IBSS and managed mode)
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* @BSS_CHANGED_BEACON: Beacon data changed, retrieve
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* new beacon (beaconing modes)
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* @BSS_CHANGED_BEACON_ENABLED: Beaconing should be
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* enabled/disabled (beaconing modes)
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*/
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enum ieee80211_bss_change {
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BSS_CHANGED_ASSOC = 1<<0,
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BSS_CHANGED_ERP_CTS_PROT = 1<<1,
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BSS_CHANGED_ERP_PREAMBLE = 1<<2,
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BSS_CHANGED_ERP_SLOT = 1<<3,
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BSS_CHANGED_HT = 1<<4,
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BSS_CHANGED_BASIC_RATES = 1<<5,
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BSS_CHANGED_BEACON_INT = 1<<6,
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BSS_CHANGED_BSSID = 1<<7,
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BSS_CHANGED_BEACON = 1<<8,
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BSS_CHANGED_BEACON_ENABLED = 1<<9,
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};
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/**
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* struct ieee80211_bss_conf - holds the BSS's changing parameters
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*
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* This structure keeps information about a BSS (and an association
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* to that BSS) that can change during the lifetime of the BSS.
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*
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* @assoc: association status
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* @aid: association ID number, valid only when @assoc is true
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* @use_cts_prot: use CTS protection
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* @use_short_preamble: use 802.11b short preamble;
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* if the hardware cannot handle this it must set the
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* IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE hardware flag
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* @use_short_slot: use short slot time (only relevant for ERP);
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* if the hardware cannot handle this it must set the
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* IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE hardware flag
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* @dtim_period: num of beacons before the next DTIM, for PSM
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* @timestamp: beacon timestamp
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* @beacon_int: beacon interval
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* @assoc_capability: capabilities taken from assoc resp
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* @basic_rates: bitmap of basic rates, each bit stands for an
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* index into the rate table configured by the driver in
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* the current band.
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* @bssid: The BSSID for this BSS
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* @enable_beacon: whether beaconing should be enabled or not
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* @ht_operation_mode: HT operation mode (like in &struct ieee80211_ht_info).
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* This field is only valid when the channel type is one of the HT types.
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*/
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struct ieee80211_bss_conf {
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const u8 *bssid;
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/* association related data */
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bool assoc;
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u16 aid;
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/* erp related data */
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bool use_cts_prot;
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bool use_short_preamble;
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bool use_short_slot;
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bool enable_beacon;
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u8 dtim_period;
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u16 beacon_int;
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u16 assoc_capability;
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u64 timestamp;
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u32 basic_rates;
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u16 ht_operation_mode;
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};
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/**
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* enum mac80211_tx_control_flags - flags to describe transmission information/status
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*
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* These flags are used with the @flags member of &ieee80211_tx_info.
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*
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* @IEEE80211_TX_CTL_REQ_TX_STATUS: require TX status callback for this frame.
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* @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
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* number to this frame, taking care of not overwriting the fragment
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* number and increasing the sequence number only when the
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* IEEE80211_TX_CTL_FIRST_FRAGMENT flag is set. mac80211 will properly
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* assign sequence numbers to QoS-data frames but cannot do so correctly
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* for non-QoS-data and management frames because beacons need them from
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* that counter as well and mac80211 cannot guarantee proper sequencing.
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* If this flag is set, the driver should instruct the hardware to
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* assign a sequence number to the frame or assign one itself. Cf. IEEE
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* 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
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* beacons and always be clear for frames without a sequence number field.
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* @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
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* @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
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* station
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* @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
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* @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
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* @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
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* @IEEE80211_TX_CTL_INJECTED: Frame was injected, internal to mac80211.
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* @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
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* because the destination STA was in powersave mode. Note that to
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* avoid race conditions, the filter must be set by the hardware or
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* firmware upon receiving a frame that indicates that the station
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* went to sleep (must be done on device to filter frames already on
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* the queue) and may only be unset after mac80211 gives the OK for
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* that by setting the IEEE80211_TX_CTL_CLEAR_PS_FILT (see above),
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* since only then is it guaranteed that no more frames are in the
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* hardware queue.
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* @IEEE80211_TX_STAT_ACK: Frame was acknowledged
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* @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
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* is for the whole aggregation.
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* @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
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* so consider using block ack request (BAR).
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* @IEEE80211_TX_CTL_RATE_CTRL_PROBE: internal to mac80211, can be
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* set by rate control algorithms to indicate probe rate, will
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* be cleared for fragmented frames (except on the last fragment)
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* @IEEE80211_TX_INTFL_RCALGO: mac80211 internal flag, do not test or
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* set this flag in the driver; indicates that the rate control
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* algorithm was used and should be notified of TX status
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* @IEEE80211_TX_INTFL_NEED_TXPROCESSING: completely internal to mac80211,
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* used to indicate that a pending frame requires TX processing before
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* it can be sent out.
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* @IEEE80211_TX_INTFL_RETRIED: completely internal to mac80211,
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* used to indicate that a frame was already retried due to PS
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* @IEEE80211_TX_INTFL_DONT_ENCRYPT: completely internal to mac80211,
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* used to indicate frame should not be encrypted
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* @IEEE80211_TX_CTL_PSPOLL_RESPONSE: (internal?)
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* This frame is a response to a PS-poll frame and should be sent
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* although the station is in powersave mode.
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* @IEEE80211_TX_CTL_MORE_FRAMES: More frames will be passed to the
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* transmit function after the current frame, this can be used
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* by drivers to kick the DMA queue only if unset or when the
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* queue gets full.
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*/
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enum mac80211_tx_control_flags {
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IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
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IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(1),
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IEEE80211_TX_CTL_NO_ACK = BIT(2),
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IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(3),
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IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(4),
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IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(5),
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IEEE80211_TX_CTL_AMPDU = BIT(6),
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IEEE80211_TX_CTL_INJECTED = BIT(7),
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IEEE80211_TX_STAT_TX_FILTERED = BIT(8),
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IEEE80211_TX_STAT_ACK = BIT(9),
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IEEE80211_TX_STAT_AMPDU = BIT(10),
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IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(11),
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IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(12),
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IEEE80211_TX_INTFL_RCALGO = BIT(13),
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IEEE80211_TX_INTFL_NEED_TXPROCESSING = BIT(14),
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IEEE80211_TX_INTFL_RETRIED = BIT(15),
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IEEE80211_TX_INTFL_DONT_ENCRYPT = BIT(16),
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IEEE80211_TX_CTL_PSPOLL_RESPONSE = BIT(17),
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IEEE80211_TX_CTL_MORE_FRAMES = BIT(18),
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};
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/**
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* enum mac80211_rate_control_flags - per-rate flags set by the
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* Rate Control algorithm.
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*
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* These flags are set by the Rate control algorithm for each rate during tx,
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* in the @flags member of struct ieee80211_tx_rate.
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*
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* @IEEE80211_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.
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* @IEEE80211_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.
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* This is set if the current BSS requires ERP protection.
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* @IEEE80211_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
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* @IEEE80211_TX_RC_MCS: HT rate.
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* @IEEE80211_TX_RC_GREEN_FIELD: Indicates whether this rate should be used in
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* Greenfield mode.
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* @IEEE80211_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be 40 MHz.
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* @IEEE80211_TX_RC_DUP_DATA: The frame should be transmitted on both of the
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* adjacent 20 MHz channels, if the current channel type is
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* NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
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* @IEEE80211_TX_RC_SHORT_GI: Short Guard interval should be used for this rate.
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*/
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enum mac80211_rate_control_flags {
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IEEE80211_TX_RC_USE_RTS_CTS = BIT(0),
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IEEE80211_TX_RC_USE_CTS_PROTECT = BIT(1),
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IEEE80211_TX_RC_USE_SHORT_PREAMBLE = BIT(2),
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/* rate index is an MCS rate number instead of an index */
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IEEE80211_TX_RC_MCS = BIT(3),
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IEEE80211_TX_RC_GREEN_FIELD = BIT(4),
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IEEE80211_TX_RC_40_MHZ_WIDTH = BIT(5),
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IEEE80211_TX_RC_DUP_DATA = BIT(6),
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IEEE80211_TX_RC_SHORT_GI = BIT(7),
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};
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/* there are 40 bytes if you don't need the rateset to be kept */
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#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE 40
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/* if you do need the rateset, then you have less space */
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#define IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE 24
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/* maximum number of rate stages */
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#define IEEE80211_TX_MAX_RATES 5
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/**
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* struct ieee80211_tx_rate - rate selection/status
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*
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* @idx: rate index to attempt to send with
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* @flags: rate control flags (&enum mac80211_rate_control_flags)
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* @count: number of tries in this rate before going to the next rate
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*
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* A value of -1 for @idx indicates an invalid rate and, if used
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* in an array of retry rates, that no more rates should be tried.
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*
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* When used for transmit status reporting, the driver should
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* always report the rate along with the flags it used.
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*
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* &struct ieee80211_tx_info contains an array of these structs
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* in the control information, and it will be filled by the rate
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* control algorithm according to what should be sent. For example,
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* if this array contains, in the format { <idx>, <count> } the
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* information
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* { 3, 2 }, { 2, 2 }, { 1, 4 }, { -1, 0 }, { -1, 0 }
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* then this means that the frame should be transmitted
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* up to twice at rate 3, up to twice at rate 2, and up to four
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* times at rate 1 if it doesn't get acknowledged. Say it gets
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* acknowledged by the peer after the fifth attempt, the status
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* information should then contain
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* { 3, 2 }, { 2, 2 }, { 1, 1 }, { -1, 0 } ...
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* since it was transmitted twice at rate 3, twice at rate 2
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* and once at rate 1 after which we received an acknowledgement.
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*/
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struct ieee80211_tx_rate {
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s8 idx;
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u8 count;
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u8 flags;
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} __attribute__((packed));
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/**
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* struct ieee80211_tx_info - skb transmit information
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*
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* This structure is placed in skb->cb for three uses:
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* (1) mac80211 TX control - mac80211 tells the driver what to do
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* (2) driver internal use (if applicable)
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* (3) TX status information - driver tells mac80211 what happened
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*
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* The TX control's sta pointer is only valid during the ->tx call,
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* it may be NULL.
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*
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* @flags: transmit info flags, defined above
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* @band: the band to transmit on (use for checking for races)
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* @antenna_sel_tx: antenna to use, 0 for automatic diversity
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* @pad: padding, ignore
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* @control: union for control data
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* @status: union for status data
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* @driver_data: array of driver_data pointers
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* @ampdu_ack_len: number of acked aggregated frames.
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* relevant only if IEEE80211_TX_STATUS_AMPDU was set.
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* @ampdu_ack_map: block ack bit map for the aggregation.
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* relevant only if IEEE80211_TX_STATUS_AMPDU was set.
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* @ampdu_len: number of aggregated frames.
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* relevant only if IEEE80211_TX_STATUS_AMPDU was set.
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* @ack_signal: signal strength of the ACK frame
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*/
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struct ieee80211_tx_info {
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/* common information */
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u32 flags;
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u8 band;
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u8 antenna_sel_tx;
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/* 2 byte hole */
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u8 pad[2];
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union {
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struct {
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union {
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/* rate control */
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struct {
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struct ieee80211_tx_rate rates[
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IEEE80211_TX_MAX_RATES];
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s8 rts_cts_rate_idx;
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};
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/* only needed before rate control */
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unsigned long jiffies;
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};
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/* NB: vif can be NULL for injected frames */
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struct ieee80211_vif *vif;
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struct ieee80211_key_conf *hw_key;
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struct ieee80211_sta *sta;
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} control;
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struct {
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struct ieee80211_tx_rate rates[IEEE80211_TX_MAX_RATES];
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u8 ampdu_ack_len;
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u64 ampdu_ack_map;
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int ack_signal;
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u8 ampdu_len;
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/* 7 bytes free */
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} status;
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struct {
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struct ieee80211_tx_rate driver_rates[
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IEEE80211_TX_MAX_RATES];
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void *rate_driver_data[
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IEEE80211_TX_INFO_RATE_DRIVER_DATA_SIZE / sizeof(void *)];
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};
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void *driver_data[
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IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *)];
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};
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};
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|
|
|
static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
|
|
{
|
|
return (struct ieee80211_tx_info *)skb->cb;
|
|
}
|
|
|
|
static inline struct ieee80211_rx_status *IEEE80211_SKB_RXCB(struct sk_buff *skb)
|
|
{
|
|
return (struct ieee80211_rx_status *)skb->cb;
|
|
}
|
|
|
|
/**
|
|
* ieee80211_tx_info_clear_status - clear TX status
|
|
*
|
|
* @info: The &struct ieee80211_tx_info to be cleared.
|
|
*
|
|
* When the driver passes an skb back to mac80211, it must report
|
|
* a number of things in TX status. This function clears everything
|
|
* in the TX status but the rate control information (it does clear
|
|
* the count since you need to fill that in anyway).
|
|
*
|
|
* NOTE: You can only use this function if you do NOT use
|
|
* info->driver_data! Use info->rate_driver_data
|
|
* instead if you need only the less space that allows.
|
|
*/
|
|
static inline void
|
|
ieee80211_tx_info_clear_status(struct ieee80211_tx_info *info)
|
|
{
|
|
int i;
|
|
|
|
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
|
|
offsetof(struct ieee80211_tx_info, control.rates));
|
|
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) !=
|
|
offsetof(struct ieee80211_tx_info, driver_rates));
|
|
BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, status.rates) != 8);
|
|
/* clear the rate counts */
|
|
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++)
|
|
info->status.rates[i].count = 0;
|
|
|
|
BUILD_BUG_ON(
|
|
offsetof(struct ieee80211_tx_info, status.ampdu_ack_len) != 23);
|
|
memset(&info->status.ampdu_ack_len, 0,
|
|
sizeof(struct ieee80211_tx_info) -
|
|
offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
|
|
}
|
|
|
|
|
|
/**
|
|
* enum mac80211_rx_flags - receive flags
|
|
*
|
|
* These flags are used with the @flag member of &struct ieee80211_rx_status.
|
|
* @RX_FLAG_MMIC_ERROR: Michael MIC error was reported on this frame.
|
|
* Use together with %RX_FLAG_MMIC_STRIPPED.
|
|
* @RX_FLAG_DECRYPTED: This frame was decrypted in hardware.
|
|
* @RX_FLAG_MMIC_STRIPPED: the Michael MIC is stripped off this frame,
|
|
* verification has been done by the hardware.
|
|
* @RX_FLAG_IV_STRIPPED: The IV/ICV are stripped from this frame.
|
|
* If this flag is set, the stack cannot do any replay detection
|
|
* hence the driver or hardware will have to do that.
|
|
* @RX_FLAG_FAILED_FCS_CRC: Set this flag if the FCS check failed on
|
|
* the frame.
|
|
* @RX_FLAG_FAILED_PLCP_CRC: Set this flag if the PCLP check failed on
|
|
* the frame.
|
|
* @RX_FLAG_TSFT: The timestamp passed in the RX status (@mactime field)
|
|
* is valid. This is useful in monitor mode and necessary for beacon frames
|
|
* to enable IBSS merging.
|
|
* @RX_FLAG_SHORTPRE: Short preamble was used for this frame
|
|
* @RX_FLAG_HT: HT MCS was used and rate_idx is MCS index
|
|
* @RX_FLAG_40MHZ: HT40 (40 MHz) was used
|
|
* @RX_FLAG_SHORT_GI: Short guard interval was used
|
|
*/
|
|
enum mac80211_rx_flags {
|
|
RX_FLAG_MMIC_ERROR = 1<<0,
|
|
RX_FLAG_DECRYPTED = 1<<1,
|
|
RX_FLAG_MMIC_STRIPPED = 1<<3,
|
|
RX_FLAG_IV_STRIPPED = 1<<4,
|
|
RX_FLAG_FAILED_FCS_CRC = 1<<5,
|
|
RX_FLAG_FAILED_PLCP_CRC = 1<<6,
|
|
RX_FLAG_TSFT = 1<<7,
|
|
RX_FLAG_SHORTPRE = 1<<8,
|
|
RX_FLAG_HT = 1<<9,
|
|
RX_FLAG_40MHZ = 1<<10,
|
|
RX_FLAG_SHORT_GI = 1<<11,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_rx_status - receive status
|
|
*
|
|
* The low-level driver should provide this information (the subset
|
|
* supported by hardware) to the 802.11 code with each received
|
|
* frame, in the skb's control buffer (cb).
|
|
*
|
|
* @mactime: value in microseconds of the 64-bit Time Synchronization Function
|
|
* (TSF) timer when the first data symbol (MPDU) arrived at the hardware.
|
|
* @band: the active band when this frame was received
|
|
* @freq: frequency the radio was tuned to when receiving this frame, in MHz
|
|
* @signal: signal strength when receiving this frame, either in dBm, in dB or
|
|
* unspecified depending on the hardware capabilities flags
|
|
* @IEEE80211_HW_SIGNAL_*
|
|
* @noise: noise when receiving this frame, in dBm.
|
|
* @qual: overall signal quality indication, in percent (0-100).
|
|
* @antenna: antenna used
|
|
* @rate_idx: index of data rate into band's supported rates or MCS index if
|
|
* HT rates are use (RX_FLAG_HT)
|
|
* @flag: %RX_FLAG_*
|
|
*/
|
|
struct ieee80211_rx_status {
|
|
u64 mactime;
|
|
enum ieee80211_band band;
|
|
int freq;
|
|
int signal;
|
|
int noise;
|
|
int __deprecated qual;
|
|
int antenna;
|
|
int rate_idx;
|
|
int flag;
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_conf_flags - configuration flags
|
|
*
|
|
* Flags to define PHY configuration options
|
|
*
|
|
* @IEEE80211_CONF_MONITOR: there's a monitor interface present -- use this
|
|
* to determine for example whether to calculate timestamps for packets
|
|
* or not, do not use instead of filter flags!
|
|
* @IEEE80211_CONF_PS: Enable 802.11 power save mode (managed mode only)
|
|
* @IEEE80211_CONF_IDLE: The device is running, but idle; if the flag is set
|
|
* the driver should be prepared to handle configuration requests but
|
|
* may turn the device off as much as possible. Typically, this flag will
|
|
* be set when an interface is set UP but not associated or scanning, but
|
|
* it can also be unset in that case when monitor interfaces are active.
|
|
*/
|
|
enum ieee80211_conf_flags {
|
|
IEEE80211_CONF_MONITOR = (1<<0),
|
|
IEEE80211_CONF_PS = (1<<1),
|
|
IEEE80211_CONF_IDLE = (1<<2),
|
|
};
|
|
|
|
|
|
/**
|
|
* enum ieee80211_conf_changed - denotes which configuration changed
|
|
*
|
|
* @IEEE80211_CONF_CHANGE_LISTEN_INTERVAL: the listen interval changed
|
|
* @IEEE80211_CONF_CHANGE_MONITOR: the monitor flag changed
|
|
* @IEEE80211_CONF_CHANGE_PS: the PS flag or dynamic PS timeout changed
|
|
* @IEEE80211_CONF_CHANGE_POWER: the TX power changed
|
|
* @IEEE80211_CONF_CHANGE_CHANNEL: the channel/channel_type changed
|
|
* @IEEE80211_CONF_CHANGE_RETRY_LIMITS: retry limits changed
|
|
* @IEEE80211_CONF_CHANGE_IDLE: Idle flag changed
|
|
*/
|
|
enum ieee80211_conf_changed {
|
|
IEEE80211_CONF_CHANGE_LISTEN_INTERVAL = BIT(2),
|
|
IEEE80211_CONF_CHANGE_MONITOR = BIT(3),
|
|
IEEE80211_CONF_CHANGE_PS = BIT(4),
|
|
IEEE80211_CONF_CHANGE_POWER = BIT(5),
|
|
IEEE80211_CONF_CHANGE_CHANNEL = BIT(6),
|
|
IEEE80211_CONF_CHANGE_RETRY_LIMITS = BIT(7),
|
|
IEEE80211_CONF_CHANGE_IDLE = BIT(8),
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_conf - configuration of the device
|
|
*
|
|
* This struct indicates how the driver shall configure the hardware.
|
|
*
|
|
* @flags: configuration flags defined above
|
|
*
|
|
* @listen_interval: listen interval in units of beacon interval
|
|
* @max_sleep_period: the maximum number of beacon intervals to sleep for
|
|
* before checking the beacon for a TIM bit (managed mode only); this
|
|
* value will be only achievable between DTIM frames, the hardware
|
|
* needs to check for the multicast traffic bit in DTIM beacons.
|
|
* This variable is valid only when the CONF_PS flag is set.
|
|
* @dynamic_ps_timeout: The dynamic powersave timeout (in ms), see the
|
|
* powersave documentation below. This variable is valid only when
|
|
* the CONF_PS flag is set.
|
|
*
|
|
* @power_level: requested transmit power (in dBm)
|
|
*
|
|
* @channel: the channel to tune to
|
|
* @channel_type: the channel (HT) type
|
|
*
|
|
* @long_frame_max_tx_count: Maximum number of transmissions for a "long" frame
|
|
* (a frame not RTS protected), called "dot11LongRetryLimit" in 802.11,
|
|
* but actually means the number of transmissions not the number of retries
|
|
* @short_frame_max_tx_count: Maximum number of transmissions for a "short"
|
|
* frame, called "dot11ShortRetryLimit" in 802.11, but actually means the
|
|
* number of transmissions not the number of retries
|
|
*/
|
|
struct ieee80211_conf {
|
|
u32 flags;
|
|
int power_level, dynamic_ps_timeout;
|
|
int max_sleep_period;
|
|
|
|
u16 listen_interval;
|
|
|
|
u8 long_frame_max_tx_count, short_frame_max_tx_count;
|
|
|
|
struct ieee80211_channel *channel;
|
|
enum nl80211_channel_type channel_type;
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_vif - per-interface data
|
|
*
|
|
* Data in this structure is continually present for driver
|
|
* use during the life of a virtual interface.
|
|
*
|
|
* @type: type of this virtual interface
|
|
* @bss_conf: BSS configuration for this interface, either our own
|
|
* or the BSS we're associated to
|
|
* @drv_priv: data area for driver use, will always be aligned to
|
|
* sizeof(void *).
|
|
*/
|
|
struct ieee80211_vif {
|
|
enum nl80211_iftype type;
|
|
struct ieee80211_bss_conf bss_conf;
|
|
/* must be last */
|
|
u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
|
|
};
|
|
|
|
static inline bool ieee80211_vif_is_mesh(struct ieee80211_vif *vif)
|
|
{
|
|
#ifdef CONFIG_MAC80211_MESH
|
|
return vif->type == NL80211_IFTYPE_MESH_POINT;
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* struct ieee80211_if_init_conf - initial configuration of an interface
|
|
*
|
|
* @vif: pointer to a driver-use per-interface structure. The pointer
|
|
* itself is also used for various functions including
|
|
* ieee80211_beacon_get() and ieee80211_get_buffered_bc().
|
|
* @type: one of &enum nl80211_iftype constants. Determines the type of
|
|
* added/removed interface.
|
|
* @mac_addr: pointer to MAC address of the interface. This pointer is valid
|
|
* until the interface is removed (i.e. it cannot be used after
|
|
* remove_interface() callback was called for this interface).
|
|
*
|
|
* This structure is used in add_interface() and remove_interface()
|
|
* callbacks of &struct ieee80211_hw.
|
|
*
|
|
* When you allow multiple interfaces to be added to your PHY, take care
|
|
* that the hardware can actually handle multiple MAC addresses. However,
|
|
* also take care that when there's no interface left with mac_addr != %NULL
|
|
* you remove the MAC address from the device to avoid acknowledging packets
|
|
* in pure monitor mode.
|
|
*/
|
|
struct ieee80211_if_init_conf {
|
|
enum nl80211_iftype type;
|
|
struct ieee80211_vif *vif;
|
|
void *mac_addr;
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_key_alg - key algorithm
|
|
* @ALG_WEP: WEP40 or WEP104
|
|
* @ALG_TKIP: TKIP
|
|
* @ALG_CCMP: CCMP (AES)
|
|
* @ALG_AES_CMAC: AES-128-CMAC
|
|
*/
|
|
enum ieee80211_key_alg {
|
|
ALG_WEP,
|
|
ALG_TKIP,
|
|
ALG_CCMP,
|
|
ALG_AES_CMAC,
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_key_flags - key flags
|
|
*
|
|
* These flags are used for communication about keys between the driver
|
|
* and mac80211, with the @flags parameter of &struct ieee80211_key_conf.
|
|
*
|
|
* @IEEE80211_KEY_FLAG_WMM_STA: Set by mac80211, this flag indicates
|
|
* that the STA this key will be used with could be using QoS.
|
|
* @IEEE80211_KEY_FLAG_GENERATE_IV: This flag should be set by the
|
|
* driver to indicate that it requires IV generation for this
|
|
* particular key.
|
|
* @IEEE80211_KEY_FLAG_GENERATE_MMIC: This flag should be set by
|
|
* the driver for a TKIP key if it requires Michael MIC
|
|
* generation in software.
|
|
* @IEEE80211_KEY_FLAG_PAIRWISE: Set by mac80211, this flag indicates
|
|
* that the key is pairwise rather then a shared key.
|
|
* @IEEE80211_KEY_FLAG_SW_MGMT: This flag should be set by the driver for a
|
|
* CCMP key if it requires CCMP encryption of management frames (MFP) to
|
|
* be done in software.
|
|
*/
|
|
enum ieee80211_key_flags {
|
|
IEEE80211_KEY_FLAG_WMM_STA = 1<<0,
|
|
IEEE80211_KEY_FLAG_GENERATE_IV = 1<<1,
|
|
IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
|
|
IEEE80211_KEY_FLAG_PAIRWISE = 1<<3,
|
|
IEEE80211_KEY_FLAG_SW_MGMT = 1<<4,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_key_conf - key information
|
|
*
|
|
* This key information is given by mac80211 to the driver by
|
|
* the set_key() callback in &struct ieee80211_ops.
|
|
*
|
|
* @hw_key_idx: To be set by the driver, this is the key index the driver
|
|
* wants to be given when a frame is transmitted and needs to be
|
|
* encrypted in hardware.
|
|
* @alg: The key algorithm.
|
|
* @flags: key flags, see &enum ieee80211_key_flags.
|
|
* @keyidx: the key index (0-3)
|
|
* @keylen: key material length
|
|
* @key: key material. For ALG_TKIP the key is encoded as a 256-bit (32 byte)
|
|
* data block:
|
|
* - Temporal Encryption Key (128 bits)
|
|
* - Temporal Authenticator Tx MIC Key (64 bits)
|
|
* - Temporal Authenticator Rx MIC Key (64 bits)
|
|
* @icv_len: The ICV length for this key type
|
|
* @iv_len: The IV length for this key type
|
|
*/
|
|
struct ieee80211_key_conf {
|
|
enum ieee80211_key_alg alg;
|
|
u8 icv_len;
|
|
u8 iv_len;
|
|
u8 hw_key_idx;
|
|
u8 flags;
|
|
s8 keyidx;
|
|
u8 keylen;
|
|
u8 key[0];
|
|
};
|
|
|
|
/**
|
|
* enum set_key_cmd - key command
|
|
*
|
|
* Used with the set_key() callback in &struct ieee80211_ops, this
|
|
* indicates whether a key is being removed or added.
|
|
*
|
|
* @SET_KEY: a key is set
|
|
* @DISABLE_KEY: a key must be disabled
|
|
*/
|
|
enum set_key_cmd {
|
|
SET_KEY, DISABLE_KEY,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_sta - station table entry
|
|
*
|
|
* A station table entry represents a station we are possibly
|
|
* communicating with. Since stations are RCU-managed in
|
|
* mac80211, any ieee80211_sta pointer you get access to must
|
|
* either be protected by rcu_read_lock() explicitly or implicitly,
|
|
* or you must take good care to not use such a pointer after a
|
|
* call to your sta_notify callback that removed it.
|
|
*
|
|
* @addr: MAC address
|
|
* @aid: AID we assigned to the station if we're an AP
|
|
* @supp_rates: Bitmap of supported rates (per band)
|
|
* @ht_cap: HT capabilities of this STA; restricted to our own TX capabilities
|
|
* @drv_priv: data area for driver use, will always be aligned to
|
|
* sizeof(void *), size is determined in hw information.
|
|
*/
|
|
struct ieee80211_sta {
|
|
u32 supp_rates[IEEE80211_NUM_BANDS];
|
|
u8 addr[ETH_ALEN];
|
|
u16 aid;
|
|
struct ieee80211_sta_ht_cap ht_cap;
|
|
|
|
/* must be last */
|
|
u8 drv_priv[0] __attribute__((__aligned__(sizeof(void *))));
|
|
};
|
|
|
|
/**
|
|
* enum sta_notify_cmd - sta notify command
|
|
*
|
|
* Used with the sta_notify() callback in &struct ieee80211_ops, this
|
|
* indicates addition and removal of a station to station table,
|
|
* or if a associated station made a power state transition.
|
|
*
|
|
* @STA_NOTIFY_ADD: a station was added to the station table
|
|
* @STA_NOTIFY_REMOVE: a station being removed from the station table
|
|
* @STA_NOTIFY_SLEEP: a station is now sleeping
|
|
* @STA_NOTIFY_AWAKE: a sleeping station woke up
|
|
*/
|
|
enum sta_notify_cmd {
|
|
STA_NOTIFY_ADD, STA_NOTIFY_REMOVE,
|
|
STA_NOTIFY_SLEEP, STA_NOTIFY_AWAKE,
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_tkip_key_type - get tkip key
|
|
*
|
|
* Used by drivers which need to get a tkip key for skb. Some drivers need a
|
|
* phase 1 key, others need a phase 2 key. A single function allows the driver
|
|
* to get the key, this enum indicates what type of key is required.
|
|
*
|
|
* @IEEE80211_TKIP_P1_KEY: the driver needs a phase 1 key
|
|
* @IEEE80211_TKIP_P2_KEY: the driver needs a phase 2 key
|
|
*/
|
|
enum ieee80211_tkip_key_type {
|
|
IEEE80211_TKIP_P1_KEY,
|
|
IEEE80211_TKIP_P2_KEY,
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_hw_flags - hardware flags
|
|
*
|
|
* These flags are used to indicate hardware capabilities to
|
|
* the stack. Generally, flags here should have their meaning
|
|
* done in a way that the simplest hardware doesn't need setting
|
|
* any particular flags. There are some exceptions to this rule,
|
|
* however, so you are advised to review these flags carefully.
|
|
*
|
|
* @IEEE80211_HW_HAS_RATE_CONTROL:
|
|
* The hardware or firmware includes rate control, and cannot be
|
|
* controlled by the stack. As such, no rate control algorithm
|
|
* should be instantiated, and the TX rate reported to userspace
|
|
* will be taken from the TX status instead of the rate control
|
|
* algorithm.
|
|
* Note that this requires that the driver implement a number of
|
|
* callbacks so it has the correct information, it needs to have
|
|
* the @set_rts_threshold callback and must look at the BSS config
|
|
* @use_cts_prot for G/N protection, @use_short_slot for slot
|
|
* timing in 2.4 GHz and @use_short_preamble for preambles for
|
|
* CCK frames.
|
|
*
|
|
* @IEEE80211_HW_RX_INCLUDES_FCS:
|
|
* Indicates that received frames passed to the stack include
|
|
* the FCS at the end.
|
|
*
|
|
* @IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING:
|
|
* Some wireless LAN chipsets buffer broadcast/multicast frames
|
|
* for power saving stations in the hardware/firmware and others
|
|
* rely on the host system for such buffering. This option is used
|
|
* to configure the IEEE 802.11 upper layer to buffer broadcast and
|
|
* multicast frames when there are power saving stations so that
|
|
* the driver can fetch them with ieee80211_get_buffered_bc().
|
|
*
|
|
* @IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE:
|
|
* Hardware is not capable of short slot operation on the 2.4 GHz band.
|
|
*
|
|
* @IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE:
|
|
* Hardware is not capable of receiving frames with short preamble on
|
|
* the 2.4 GHz band.
|
|
*
|
|
* @IEEE80211_HW_SIGNAL_UNSPEC:
|
|
* Hardware can provide signal values but we don't know its units. We
|
|
* expect values between 0 and @max_signal.
|
|
* If possible please provide dB or dBm instead.
|
|
*
|
|
* @IEEE80211_HW_SIGNAL_DBM:
|
|
* Hardware gives signal values in dBm, decibel difference from
|
|
* one milliwatt. This is the preferred method since it is standardized
|
|
* between different devices. @max_signal does not need to be set.
|
|
*
|
|
* @IEEE80211_HW_NOISE_DBM:
|
|
* Hardware can provide noise (radio interference) values in units dBm,
|
|
* decibel difference from one milliwatt.
|
|
*
|
|
* @IEEE80211_HW_SPECTRUM_MGMT:
|
|
* Hardware supports spectrum management defined in 802.11h
|
|
* Measurement, Channel Switch, Quieting, TPC
|
|
*
|
|
* @IEEE80211_HW_AMPDU_AGGREGATION:
|
|
* Hardware supports 11n A-MPDU aggregation.
|
|
*
|
|
* @IEEE80211_HW_SUPPORTS_PS:
|
|
* Hardware has power save support (i.e. can go to sleep).
|
|
*
|
|
* @IEEE80211_HW_PS_NULLFUNC_STACK:
|
|
* Hardware requires nullfunc frame handling in stack, implies
|
|
* stack support for dynamic PS.
|
|
*
|
|
* @IEEE80211_HW_SUPPORTS_DYNAMIC_PS:
|
|
* Hardware has support for dynamic PS.
|
|
*
|
|
* @IEEE80211_HW_MFP_CAPABLE:
|
|
* Hardware supports management frame protection (MFP, IEEE 802.11w).
|
|
*
|
|
* @IEEE80211_HW_BEACON_FILTER:
|
|
* Hardware supports dropping of irrelevant beacon frames to
|
|
* avoid waking up cpu.
|
|
*/
|
|
enum ieee80211_hw_flags {
|
|
IEEE80211_HW_HAS_RATE_CONTROL = 1<<0,
|
|
IEEE80211_HW_RX_INCLUDES_FCS = 1<<1,
|
|
IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING = 1<<2,
|
|
IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3,
|
|
IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4,
|
|
IEEE80211_HW_SIGNAL_UNSPEC = 1<<5,
|
|
IEEE80211_HW_SIGNAL_DBM = 1<<6,
|
|
IEEE80211_HW_NOISE_DBM = 1<<7,
|
|
IEEE80211_HW_SPECTRUM_MGMT = 1<<8,
|
|
IEEE80211_HW_AMPDU_AGGREGATION = 1<<9,
|
|
IEEE80211_HW_SUPPORTS_PS = 1<<10,
|
|
IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11,
|
|
IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12,
|
|
IEEE80211_HW_MFP_CAPABLE = 1<<13,
|
|
IEEE80211_HW_BEACON_FILTER = 1<<14,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_hw - hardware information and state
|
|
*
|
|
* This structure contains the configuration and hardware
|
|
* information for an 802.11 PHY.
|
|
*
|
|
* @wiphy: This points to the &struct wiphy allocated for this
|
|
* 802.11 PHY. You must fill in the @perm_addr and @dev
|
|
* members of this structure using SET_IEEE80211_DEV()
|
|
* and SET_IEEE80211_PERM_ADDR(). Additionally, all supported
|
|
* bands (with channels, bitrates) are registered here.
|
|
*
|
|
* @conf: &struct ieee80211_conf, device configuration, don't use.
|
|
*
|
|
* @priv: pointer to private area that was allocated for driver use
|
|
* along with this structure.
|
|
*
|
|
* @flags: hardware flags, see &enum ieee80211_hw_flags.
|
|
*
|
|
* @extra_tx_headroom: headroom to reserve in each transmit skb
|
|
* for use by the driver (e.g. for transmit headers.)
|
|
*
|
|
* @channel_change_time: time (in microseconds) it takes to change channels.
|
|
*
|
|
* @max_signal: Maximum value for signal (rssi) in RX information, used
|
|
* only when @IEEE80211_HW_SIGNAL_UNSPEC or @IEEE80211_HW_SIGNAL_DB
|
|
*
|
|
* @max_listen_interval: max listen interval in units of beacon interval
|
|
* that HW supports
|
|
*
|
|
* @queues: number of available hardware transmit queues for
|
|
* data packets. WMM/QoS requires at least four, these
|
|
* queues need to have configurable access parameters.
|
|
*
|
|
* @rate_control_algorithm: rate control algorithm for this hardware.
|
|
* If unset (NULL), the default algorithm will be used. Must be
|
|
* set before calling ieee80211_register_hw().
|
|
*
|
|
* @vif_data_size: size (in bytes) of the drv_priv data area
|
|
* within &struct ieee80211_vif.
|
|
* @sta_data_size: size (in bytes) of the drv_priv data area
|
|
* within &struct ieee80211_sta.
|
|
*
|
|
* @max_rates: maximum number of alternate rate retry stages
|
|
* @max_rate_tries: maximum number of tries for each stage
|
|
*/
|
|
struct ieee80211_hw {
|
|
struct ieee80211_conf conf;
|
|
struct wiphy *wiphy;
|
|
const char *rate_control_algorithm;
|
|
void *priv;
|
|
u32 flags;
|
|
unsigned int extra_tx_headroom;
|
|
int channel_change_time;
|
|
int vif_data_size;
|
|
int sta_data_size;
|
|
u16 queues;
|
|
u16 max_listen_interval;
|
|
s8 max_signal;
|
|
u8 max_rates;
|
|
u8 max_rate_tries;
|
|
};
|
|
|
|
/**
|
|
* wiphy_to_ieee80211_hw - return a mac80211 driver hw struct from a wiphy
|
|
*
|
|
* @wiphy: the &struct wiphy which we want to query
|
|
*
|
|
* mac80211 drivers can use this to get to their respective
|
|
* &struct ieee80211_hw. Drivers wishing to get to their own private
|
|
* structure can then access it via hw->priv. Note that mac802111 drivers should
|
|
* not use wiphy_priv() to try to get their private driver structure as this
|
|
* is already used internally by mac80211.
|
|
*/
|
|
struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy);
|
|
|
|
/**
|
|
* SET_IEEE80211_DEV - set device for 802.11 hardware
|
|
*
|
|
* @hw: the &struct ieee80211_hw to set the device for
|
|
* @dev: the &struct device of this 802.11 device
|
|
*/
|
|
static inline void SET_IEEE80211_DEV(struct ieee80211_hw *hw, struct device *dev)
|
|
{
|
|
set_wiphy_dev(hw->wiphy, dev);
|
|
}
|
|
|
|
/**
|
|
* SET_IEEE80211_PERM_ADDR - set the permanent MAC address for 802.11 hardware
|
|
*
|
|
* @hw: the &struct ieee80211_hw to set the MAC address for
|
|
* @addr: the address to set
|
|
*/
|
|
static inline void SET_IEEE80211_PERM_ADDR(struct ieee80211_hw *hw, u8 *addr)
|
|
{
|
|
memcpy(hw->wiphy->perm_addr, addr, ETH_ALEN);
|
|
}
|
|
|
|
static inline struct ieee80211_rate *
|
|
ieee80211_get_tx_rate(const struct ieee80211_hw *hw,
|
|
const struct ieee80211_tx_info *c)
|
|
{
|
|
if (WARN_ON(c->control.rates[0].idx < 0))
|
|
return NULL;
|
|
return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[0].idx];
|
|
}
|
|
|
|
static inline struct ieee80211_rate *
|
|
ieee80211_get_rts_cts_rate(const struct ieee80211_hw *hw,
|
|
const struct ieee80211_tx_info *c)
|
|
{
|
|
if (c->control.rts_cts_rate_idx < 0)
|
|
return NULL;
|
|
return &hw->wiphy->bands[c->band]->bitrates[c->control.rts_cts_rate_idx];
|
|
}
|
|
|
|
static inline struct ieee80211_rate *
|
|
ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw,
|
|
const struct ieee80211_tx_info *c, int idx)
|
|
{
|
|
if (c->control.rates[idx + 1].idx < 0)
|
|
return NULL;
|
|
return &hw->wiphy->bands[c->band]->bitrates[c->control.rates[idx + 1].idx];
|
|
}
|
|
|
|
/**
|
|
* DOC: Hardware crypto acceleration
|
|
*
|
|
* mac80211 is capable of taking advantage of many hardware
|
|
* acceleration designs for encryption and decryption operations.
|
|
*
|
|
* The set_key() callback in the &struct ieee80211_ops for a given
|
|
* device is called to enable hardware acceleration of encryption and
|
|
* decryption. The callback takes a @sta parameter that will be NULL
|
|
* for default keys or keys used for transmission only, or point to
|
|
* the station information for the peer for individual keys.
|
|
* Multiple transmission keys with the same key index may be used when
|
|
* VLANs are configured for an access point.
|
|
*
|
|
* When transmitting, the TX control data will use the @hw_key_idx
|
|
* selected by the driver by modifying the &struct ieee80211_key_conf
|
|
* pointed to by the @key parameter to the set_key() function.
|
|
*
|
|
* The set_key() call for the %SET_KEY command should return 0 if
|
|
* the key is now in use, -%EOPNOTSUPP or -%ENOSPC if it couldn't be
|
|
* added; if you return 0 then hw_key_idx must be assigned to the
|
|
* hardware key index, you are free to use the full u8 range.
|
|
*
|
|
* When the cmd is %DISABLE_KEY then it must succeed.
|
|
*
|
|
* Note that it is permissible to not decrypt a frame even if a key
|
|
* for it has been uploaded to hardware, the stack will not make any
|
|
* decision based on whether a key has been uploaded or not but rather
|
|
* based on the receive flags.
|
|
*
|
|
* The &struct ieee80211_key_conf structure pointed to by the @key
|
|
* parameter is guaranteed to be valid until another call to set_key()
|
|
* removes it, but it can only be used as a cookie to differentiate
|
|
* keys.
|
|
*
|
|
* In TKIP some HW need to be provided a phase 1 key, for RX decryption
|
|
* acceleration (i.e. iwlwifi). Those drivers should provide update_tkip_key
|
|
* handler.
|
|
* The update_tkip_key() call updates the driver with the new phase 1 key.
|
|
* This happens everytime the iv16 wraps around (every 65536 packets). The
|
|
* set_key() call will happen only once for each key (unless the AP did
|
|
* rekeying), it will not include a valid phase 1 key. The valid phase 1 key is
|
|
* provided by update_tkip_key only. The trigger that makes mac80211 call this
|
|
* handler is software decryption with wrap around of iv16.
|
|
*/
|
|
|
|
/**
|
|
* DOC: Powersave support
|
|
*
|
|
* mac80211 has support for various powersave implementations.
|
|
*
|
|
* First, it can support hardware that handles all powersaving by
|
|
* itself, such hardware should simply set the %IEEE80211_HW_SUPPORTS_PS
|
|
* hardware flag. In that case, it will be told about the desired
|
|
* powersave mode depending on the association status, and the driver
|
|
* must take care of sending nullfunc frames when necessary, i.e. when
|
|
* entering and leaving powersave mode. The driver is required to look at
|
|
* the AID in beacons and signal to the AP that it woke up when it finds
|
|
* traffic directed to it. This mode supports dynamic PS by simply
|
|
* enabling/disabling PS.
|
|
*
|
|
* Additionally, such hardware may set the %IEEE80211_HW_SUPPORTS_DYNAMIC_PS
|
|
* flag to indicate that it can support dynamic PS mode itself (see below).
|
|
*
|
|
* Other hardware designs cannot send nullfunc frames by themselves and also
|
|
* need software support for parsing the TIM bitmap. This is also supported
|
|
* by mac80211 by combining the %IEEE80211_HW_SUPPORTS_PS and
|
|
* %IEEE80211_HW_PS_NULLFUNC_STACK flags. The hardware is of course still
|
|
* required to pass up beacons. The hardware is still required to handle
|
|
* waking up for multicast traffic; if it cannot the driver must handle that
|
|
* as best as it can, mac80211 is too slow.
|
|
*
|
|
* Dynamic powersave mode is an extension to normal powersave mode in which
|
|
* the hardware stays awake for a user-specified period of time after sending
|
|
* a frame so that reply frames need not be buffered and therefore delayed
|
|
* to the next wakeup. This can either be supported by hardware, in which case
|
|
* the driver needs to look at the @dynamic_ps_timeout hardware configuration
|
|
* value, or by the stack if all nullfunc handling is in the stack.
|
|
*/
|
|
|
|
/**
|
|
* DOC: Beacon filter support
|
|
*
|
|
* Some hardware have beacon filter support to reduce host cpu wakeups
|
|
* which will reduce system power consumption. It usuallly works so that
|
|
* the firmware creates a checksum of the beacon but omits all constantly
|
|
* changing elements (TSF, TIM etc). Whenever the checksum changes the
|
|
* beacon is forwarded to the host, otherwise it will be just dropped. That
|
|
* way the host will only receive beacons where some relevant information
|
|
* (for example ERP protection or WMM settings) have changed.
|
|
*
|
|
* Beacon filter support is advertised with the %IEEE80211_HW_BEACON_FILTER
|
|
* hardware capability. The driver needs to enable beacon filter support
|
|
* whenever power save is enabled, that is %IEEE80211_CONF_PS is set. When
|
|
* power save is enabled, the stack will not check for beacon loss and the
|
|
* driver needs to notify about loss of beacons with ieee80211_beacon_loss().
|
|
*
|
|
* The time (or number of beacons missed) until the firmware notifies the
|
|
* driver of a beacon loss event (which in turn causes the driver to call
|
|
* ieee80211_beacon_loss()) should be configurable and will be controlled
|
|
* by mac80211 and the roaming algorithm in the future.
|
|
*
|
|
* Since there may be constantly changing information elements that nothing
|
|
* in the software stack cares about, we will, in the future, have mac80211
|
|
* tell the driver which information elements are interesting in the sense
|
|
* that we want to see changes in them. This will include
|
|
* - a list of information element IDs
|
|
* - a list of OUIs for the vendor information element
|
|
*
|
|
* Ideally, the hardware would filter out any beacons without changes in the
|
|
* requested elements, but if it cannot support that it may, at the expense
|
|
* of some efficiency, filter out only a subset. For example, if the device
|
|
* doesn't support checking for OUIs it should pass up all changes in all
|
|
* vendor information elements.
|
|
*
|
|
* Note that change, for the sake of simplification, also includes information
|
|
* elements appearing or disappearing from the beacon.
|
|
*
|
|
* Some hardware supports an "ignore list" instead, just make sure nothing
|
|
* that was requested is on the ignore list, and include commonly changing
|
|
* information element IDs in the ignore list, for example 11 (BSS load) and
|
|
* the various vendor-assigned IEs with unknown contents (128, 129, 133-136,
|
|
* 149, 150, 155, 156, 173, 176, 178, 179, 219); for forward compatibility
|
|
* it could also include some currently unused IDs.
|
|
*
|
|
*
|
|
* In addition to these capabilities, hardware should support notifying the
|
|
* host of changes in the beacon RSSI. This is relevant to implement roaming
|
|
* when no traffic is flowing (when traffic is flowing we see the RSSI of
|
|
* the received data packets). This can consist in notifying the host when
|
|
* the RSSI changes significantly or when it drops below or rises above
|
|
* configurable thresholds. In the future these thresholds will also be
|
|
* configured by mac80211 (which gets them from userspace) to implement
|
|
* them as the roaming algorithm requires.
|
|
*
|
|
* If the hardware cannot implement this, the driver should ask it to
|
|
* periodically pass beacon frames to the host so that software can do the
|
|
* signal strength threshold checking.
|
|
*/
|
|
|
|
/**
|
|
* DOC: Frame filtering
|
|
*
|
|
* mac80211 requires to see many management frames for proper
|
|
* operation, and users may want to see many more frames when
|
|
* in monitor mode. However, for best CPU usage and power consumption,
|
|
* having as few frames as possible percolate through the stack is
|
|
* desirable. Hence, the hardware should filter as much as possible.
|
|
*
|
|
* To achieve this, mac80211 uses filter flags (see below) to tell
|
|
* the driver's configure_filter() function which frames should be
|
|
* passed to mac80211 and which should be filtered out.
|
|
*
|
|
* Before configure_filter() is invoked, the prepare_multicast()
|
|
* callback is invoked with the parameters @mc_count and @mc_list
|
|
* for the combined multicast address list of all virtual interfaces.
|
|
* It's use is optional, and it returns a u64 that is passed to
|
|
* configure_filter(). Additionally, configure_filter() has the
|
|
* arguments @changed_flags telling which flags were changed and
|
|
* @total_flags with the new flag states.
|
|
*
|
|
* If your device has no multicast address filters your driver will
|
|
* need to check both the %FIF_ALLMULTI flag and the @mc_count
|
|
* parameter to see whether multicast frames should be accepted
|
|
* or dropped.
|
|
*
|
|
* All unsupported flags in @total_flags must be cleared.
|
|
* Hardware does not support a flag if it is incapable of _passing_
|
|
* the frame to the stack. Otherwise the driver must ignore
|
|
* the flag, but not clear it.
|
|
* You must _only_ clear the flag (announce no support for the
|
|
* flag to mac80211) if you are not able to pass the packet type
|
|
* to the stack (so the hardware always filters it).
|
|
* So for example, you should clear @FIF_CONTROL, if your hardware
|
|
* always filters control frames. If your hardware always passes
|
|
* control frames to the kernel and is incapable of filtering them,
|
|
* you do _not_ clear the @FIF_CONTROL flag.
|
|
* This rule applies to all other FIF flags as well.
|
|
*/
|
|
|
|
/**
|
|
* enum ieee80211_filter_flags - hardware filter flags
|
|
*
|
|
* These flags determine what the filter in hardware should be
|
|
* programmed to let through and what should not be passed to the
|
|
* stack. It is always safe to pass more frames than requested,
|
|
* but this has negative impact on power consumption.
|
|
*
|
|
* @FIF_PROMISC_IN_BSS: promiscuous mode within your BSS,
|
|
* think of the BSS as your network segment and then this corresponds
|
|
* to the regular ethernet device promiscuous mode.
|
|
*
|
|
* @FIF_ALLMULTI: pass all multicast frames, this is used if requested
|
|
* by the user or if the hardware is not capable of filtering by
|
|
* multicast address.
|
|
*
|
|
* @FIF_FCSFAIL: pass frames with failed FCS (but you need to set the
|
|
* %RX_FLAG_FAILED_FCS_CRC for them)
|
|
*
|
|
* @FIF_PLCPFAIL: pass frames with failed PLCP CRC (but you need to set
|
|
* the %RX_FLAG_FAILED_PLCP_CRC for them
|
|
*
|
|
* @FIF_BCN_PRBRESP_PROMISC: This flag is set during scanning to indicate
|
|
* to the hardware that it should not filter beacons or probe responses
|
|
* by BSSID. Filtering them can greatly reduce the amount of processing
|
|
* mac80211 needs to do and the amount of CPU wakeups, so you should
|
|
* honour this flag if possible.
|
|
*
|
|
* @FIF_CONTROL: pass control frames (except for PS Poll), if PROMISC_IN_BSS
|
|
* is not set then only those addressed to this station.
|
|
*
|
|
* @FIF_OTHER_BSS: pass frames destined to other BSSes
|
|
*
|
|
* @FIF_PSPOLL: pass PS Poll frames, if PROMISC_IN_BSS is not set then only
|
|
* those addressed to this station.
|
|
*/
|
|
enum ieee80211_filter_flags {
|
|
FIF_PROMISC_IN_BSS = 1<<0,
|
|
FIF_ALLMULTI = 1<<1,
|
|
FIF_FCSFAIL = 1<<2,
|
|
FIF_PLCPFAIL = 1<<3,
|
|
FIF_BCN_PRBRESP_PROMISC = 1<<4,
|
|
FIF_CONTROL = 1<<5,
|
|
FIF_OTHER_BSS = 1<<6,
|
|
FIF_PSPOLL = 1<<7,
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_ampdu_mlme_action - A-MPDU actions
|
|
*
|
|
* These flags are used with the ampdu_action() callback in
|
|
* &struct ieee80211_ops to indicate which action is needed.
|
|
*
|
|
* Note that drivers MUST be able to deal with a TX aggregation
|
|
* session being stopped even before they OK'ed starting it by
|
|
* calling ieee80211_start_tx_ba_cb(_irqsafe), because the peer
|
|
* might receive the addBA frame and send a delBA right away!
|
|
*
|
|
* @IEEE80211_AMPDU_RX_START: start Rx aggregation
|
|
* @IEEE80211_AMPDU_RX_STOP: stop Rx aggregation
|
|
* @IEEE80211_AMPDU_TX_START: start Tx aggregation
|
|
* @IEEE80211_AMPDU_TX_STOP: stop Tx aggregation
|
|
* @IEEE80211_AMPDU_TX_OPERATIONAL: TX aggregation has become operational
|
|
*/
|
|
enum ieee80211_ampdu_mlme_action {
|
|
IEEE80211_AMPDU_RX_START,
|
|
IEEE80211_AMPDU_RX_STOP,
|
|
IEEE80211_AMPDU_TX_START,
|
|
IEEE80211_AMPDU_TX_STOP,
|
|
IEEE80211_AMPDU_TX_OPERATIONAL,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_ops - callbacks from mac80211 to the driver
|
|
*
|
|
* This structure contains various callbacks that the driver may
|
|
* handle or, in some cases, must handle, for example to configure
|
|
* the hardware to a new channel or to transmit a frame.
|
|
*
|
|
* @tx: Handler that 802.11 module calls for each transmitted frame.
|
|
* skb contains the buffer starting from the IEEE 802.11 header.
|
|
* The low-level driver should send the frame out based on
|
|
* configuration in the TX control data. This handler should,
|
|
* preferably, never fail and stop queues appropriately, more
|
|
* importantly, however, it must never fail for A-MPDU-queues.
|
|
* This function should return NETDEV_TX_OK except in very
|
|
* limited cases.
|
|
* Must be implemented and atomic.
|
|
*
|
|
* @start: Called before the first netdevice attached to the hardware
|
|
* is enabled. This should turn on the hardware and must turn on
|
|
* frame reception (for possibly enabled monitor interfaces.)
|
|
* Returns negative error codes, these may be seen in userspace,
|
|
* or zero.
|
|
* When the device is started it should not have a MAC address
|
|
* to avoid acknowledging frames before a non-monitor device
|
|
* is added.
|
|
* Must be implemented.
|
|
*
|
|
* @stop: Called after last netdevice attached to the hardware
|
|
* is disabled. This should turn off the hardware (at least
|
|
* it must turn off frame reception.)
|
|
* May be called right after add_interface if that rejects
|
|
* an interface. If you added any work onto the mac80211 workqueue
|
|
* you should ensure to cancel it on this callback.
|
|
* Must be implemented.
|
|
*
|
|
* @add_interface: Called when a netdevice attached to the hardware is
|
|
* enabled. Because it is not called for monitor mode devices, @start
|
|
* and @stop must be implemented.
|
|
* The driver should perform any initialization it needs before
|
|
* the device can be enabled. The initial configuration for the
|
|
* interface is given in the conf parameter.
|
|
* The callback may refuse to add an interface by returning a
|
|
* negative error code (which will be seen in userspace.)
|
|
* Must be implemented.
|
|
*
|
|
* @remove_interface: Notifies a driver that an interface is going down.
|
|
* The @stop callback is called after this if it is the last interface
|
|
* and no monitor interfaces are present.
|
|
* When all interfaces are removed, the MAC address in the hardware
|
|
* must be cleared so the device no longer acknowledges packets,
|
|
* the mac_addr member of the conf structure is, however, set to the
|
|
* MAC address of the device going away.
|
|
* Hence, this callback must be implemented.
|
|
*
|
|
* @config: Handler for configuration requests. IEEE 802.11 code calls this
|
|
* function to change hardware configuration, e.g., channel.
|
|
* This function should never fail but returns a negative error code
|
|
* if it does.
|
|
*
|
|
* @bss_info_changed: Handler for configuration requests related to BSS
|
|
* parameters that may vary during BSS's lifespan, and may affect low
|
|
* level driver (e.g. assoc/disassoc status, erp parameters).
|
|
* This function should not be used if no BSS has been set, unless
|
|
* for association indication. The @changed parameter indicates which
|
|
* of the bss parameters has changed when a call is made.
|
|
*
|
|
* @prepare_multicast: Prepare for multicast filter configuration.
|
|
* This callback is optional, and its return value is passed
|
|
* to configure_filter(). This callback must be atomic.
|
|
*
|
|
* @configure_filter: Configure the device's RX filter.
|
|
* See the section "Frame filtering" for more information.
|
|
* This callback must be implemented.
|
|
*
|
|
* @set_tim: Set TIM bit. mac80211 calls this function when a TIM bit
|
|
* must be set or cleared for a given STA. Must be atomic.
|
|
*
|
|
* @set_key: See the section "Hardware crypto acceleration"
|
|
* This callback can sleep, and is only called between add_interface
|
|
* and remove_interface calls, i.e. while the given virtual interface
|
|
* is enabled.
|
|
* Returns a negative error code if the key can't be added.
|
|
*
|
|
* @update_tkip_key: See the section "Hardware crypto acceleration"
|
|
* This callback will be called in the context of Rx. Called for drivers
|
|
* which set IEEE80211_KEY_FLAG_TKIP_REQ_RX_P1_KEY.
|
|
*
|
|
* @hw_scan: Ask the hardware to service the scan request, no need to start
|
|
* the scan state machine in stack. The scan must honour the channel
|
|
* configuration done by the regulatory agent in the wiphy's
|
|
* registered bands. The hardware (or the driver) needs to make sure
|
|
* that power save is disabled.
|
|
* The @req ie/ie_len members are rewritten by mac80211 to contain the
|
|
* entire IEs after the SSID, so that drivers need not look at these
|
|
* at all but just send them after the SSID -- mac80211 includes the
|
|
* (extended) supported rates and HT information (where applicable).
|
|
* When the scan finishes, ieee80211_scan_completed() must be called;
|
|
* note that it also must be called when the scan cannot finish due to
|
|
* any error unless this callback returned a negative error code.
|
|
*
|
|
* @sw_scan_start: Notifier function that is called just before a software scan
|
|
* is started. Can be NULL, if the driver doesn't need this notification.
|
|
*
|
|
* @sw_scan_complete: Notifier function that is called just after a software scan
|
|
* finished. Can be NULL, if the driver doesn't need this notification.
|
|
*
|
|
* @get_stats: Return low-level statistics.
|
|
* Returns zero if statistics are available.
|
|
*
|
|
* @get_tkip_seq: If your device implements TKIP encryption in hardware this
|
|
* callback should be provided to read the TKIP transmit IVs (both IV32
|
|
* and IV16) for the given key from hardware.
|
|
*
|
|
* @set_rts_threshold: Configuration of RTS threshold (if device needs it)
|
|
*
|
|
* @sta_notify: Notifies low level driver about addition, removal or power
|
|
* state transition of an associated station, AP, IBSS/WDS/mesh peer etc.
|
|
* Must be atomic.
|
|
*
|
|
* @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
|
|
* bursting) for a hardware TX queue.
|
|
* Returns a negative error code on failure.
|
|
*
|
|
* @get_tx_stats: Get statistics of the current TX queue status. This is used
|
|
* to get number of currently queued packets (queue length), maximum queue
|
|
* size (limit), and total number of packets sent using each TX queue
|
|
* (count). The 'stats' pointer points to an array that has hw->queues
|
|
* items.
|
|
*
|
|
* @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
|
|
* this is only used for IBSS mode BSSID merging and debugging. Is not a
|
|
* required function.
|
|
*
|
|
* @set_tsf: Set the TSF timer to the specified value in the firmware/hardware.
|
|
* Currently, this is only used for IBSS mode debugging. Is not a
|
|
* required function.
|
|
*
|
|
* @reset_tsf: Reset the TSF timer and allow firmware/hardware to synchronize
|
|
* with other STAs in the IBSS. This is only used in IBSS mode. This
|
|
* function is optional if the firmware/hardware takes full care of
|
|
* TSF synchronization.
|
|
*
|
|
* @tx_last_beacon: Determine whether the last IBSS beacon was sent by us.
|
|
* This is needed only for IBSS mode and the result of this function is
|
|
* used to determine whether to reply to Probe Requests.
|
|
* Returns non-zero if this device sent the last beacon.
|
|
*
|
|
* @ampdu_action: Perform a certain A-MPDU action
|
|
* The RA/TID combination determines the destination and TID we want
|
|
* the ampdu action to be performed for. The action is defined through
|
|
* ieee80211_ampdu_mlme_action. Starting sequence number (@ssn)
|
|
* is the first frame we expect to perform the action on. Notice
|
|
* that TX/RX_STOP can pass NULL for this parameter.
|
|
* Returns a negative error code on failure.
|
|
*
|
|
* @rfkill_poll: Poll rfkill hardware state. If you need this, you also
|
|
* need to set wiphy->rfkill_poll to %true before registration,
|
|
* and need to call wiphy_rfkill_set_hw_state() in the callback.
|
|
*
|
|
* @testmode_cmd: Implement a cfg80211 test mode command.
|
|
*/
|
|
struct ieee80211_ops {
|
|
int (*tx)(struct ieee80211_hw *hw, struct sk_buff *skb);
|
|
int (*start)(struct ieee80211_hw *hw);
|
|
void (*stop)(struct ieee80211_hw *hw);
|
|
int (*add_interface)(struct ieee80211_hw *hw,
|
|
struct ieee80211_if_init_conf *conf);
|
|
void (*remove_interface)(struct ieee80211_hw *hw,
|
|
struct ieee80211_if_init_conf *conf);
|
|
int (*config)(struct ieee80211_hw *hw, u32 changed);
|
|
void (*bss_info_changed)(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
struct ieee80211_bss_conf *info,
|
|
u32 changed);
|
|
u64 (*prepare_multicast)(struct ieee80211_hw *hw,
|
|
int mc_count, struct dev_addr_list *mc_list);
|
|
void (*configure_filter)(struct ieee80211_hw *hw,
|
|
unsigned int changed_flags,
|
|
unsigned int *total_flags,
|
|
u64 multicast);
|
|
int (*set_tim)(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
|
|
bool set);
|
|
int (*set_key)(struct ieee80211_hw *hw, enum set_key_cmd cmd,
|
|
struct ieee80211_vif *vif, struct ieee80211_sta *sta,
|
|
struct ieee80211_key_conf *key);
|
|
void (*update_tkip_key)(struct ieee80211_hw *hw,
|
|
struct ieee80211_key_conf *conf, const u8 *address,
|
|
u32 iv32, u16 *phase1key);
|
|
int (*hw_scan)(struct ieee80211_hw *hw,
|
|
struct cfg80211_scan_request *req);
|
|
void (*sw_scan_start)(struct ieee80211_hw *hw);
|
|
void (*sw_scan_complete)(struct ieee80211_hw *hw);
|
|
int (*get_stats)(struct ieee80211_hw *hw,
|
|
struct ieee80211_low_level_stats *stats);
|
|
void (*get_tkip_seq)(struct ieee80211_hw *hw, u8 hw_key_idx,
|
|
u32 *iv32, u16 *iv16);
|
|
int (*set_rts_threshold)(struct ieee80211_hw *hw, u32 value);
|
|
void (*sta_notify)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
|
|
enum sta_notify_cmd, struct ieee80211_sta *sta);
|
|
int (*conf_tx)(struct ieee80211_hw *hw, u16 queue,
|
|
const struct ieee80211_tx_queue_params *params);
|
|
int (*get_tx_stats)(struct ieee80211_hw *hw,
|
|
struct ieee80211_tx_queue_stats *stats);
|
|
u64 (*get_tsf)(struct ieee80211_hw *hw);
|
|
void (*set_tsf)(struct ieee80211_hw *hw, u64 tsf);
|
|
void (*reset_tsf)(struct ieee80211_hw *hw);
|
|
int (*tx_last_beacon)(struct ieee80211_hw *hw);
|
|
int (*ampdu_action)(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
enum ieee80211_ampdu_mlme_action action,
|
|
struct ieee80211_sta *sta, u16 tid, u16 *ssn);
|
|
|
|
void (*rfkill_poll)(struct ieee80211_hw *hw);
|
|
#ifdef CONFIG_NL80211_TESTMODE
|
|
int (*testmode_cmd)(struct ieee80211_hw *hw, void *data, int len);
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* ieee80211_alloc_hw - Allocate a new hardware device
|
|
*
|
|
* This must be called once for each hardware device. The returned pointer
|
|
* must be used to refer to this device when calling other functions.
|
|
* mac80211 allocates a private data area for the driver pointed to by
|
|
* @priv in &struct ieee80211_hw, the size of this area is given as
|
|
* @priv_data_len.
|
|
*
|
|
* @priv_data_len: length of private data
|
|
* @ops: callbacks for this device
|
|
*/
|
|
struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
|
|
const struct ieee80211_ops *ops);
|
|
|
|
/**
|
|
* ieee80211_register_hw - Register hardware device
|
|
*
|
|
* You must call this function before any other functions in
|
|
* mac80211. Note that before a hardware can be registered, you
|
|
* need to fill the contained wiphy's information.
|
|
*
|
|
* @hw: the device to register as returned by ieee80211_alloc_hw()
|
|
*/
|
|
int ieee80211_register_hw(struct ieee80211_hw *hw);
|
|
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
extern char *__ieee80211_get_tx_led_name(struct ieee80211_hw *hw);
|
|
extern char *__ieee80211_get_rx_led_name(struct ieee80211_hw *hw);
|
|
extern char *__ieee80211_get_assoc_led_name(struct ieee80211_hw *hw);
|
|
extern char *__ieee80211_get_radio_led_name(struct ieee80211_hw *hw);
|
|
#endif
|
|
/**
|
|
* ieee80211_get_tx_led_name - get name of TX LED
|
|
*
|
|
* mac80211 creates a transmit LED trigger for each wireless hardware
|
|
* that can be used to drive LEDs if your driver registers a LED device.
|
|
* This function returns the name (or %NULL if not configured for LEDs)
|
|
* of the trigger so you can automatically link the LED device.
|
|
*
|
|
* @hw: the hardware to get the LED trigger name for
|
|
*/
|
|
static inline char *ieee80211_get_tx_led_name(struct ieee80211_hw *hw)
|
|
{
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
return __ieee80211_get_tx_led_name(hw);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* ieee80211_get_rx_led_name - get name of RX LED
|
|
*
|
|
* mac80211 creates a receive LED trigger for each wireless hardware
|
|
* that can be used to drive LEDs if your driver registers a LED device.
|
|
* This function returns the name (or %NULL if not configured for LEDs)
|
|
* of the trigger so you can automatically link the LED device.
|
|
*
|
|
* @hw: the hardware to get the LED trigger name for
|
|
*/
|
|
static inline char *ieee80211_get_rx_led_name(struct ieee80211_hw *hw)
|
|
{
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
return __ieee80211_get_rx_led_name(hw);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* ieee80211_get_assoc_led_name - get name of association LED
|
|
*
|
|
* mac80211 creates a association LED trigger for each wireless hardware
|
|
* that can be used to drive LEDs if your driver registers a LED device.
|
|
* This function returns the name (or %NULL if not configured for LEDs)
|
|
* of the trigger so you can automatically link the LED device.
|
|
*
|
|
* @hw: the hardware to get the LED trigger name for
|
|
*/
|
|
static inline char *ieee80211_get_assoc_led_name(struct ieee80211_hw *hw)
|
|
{
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
return __ieee80211_get_assoc_led_name(hw);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* ieee80211_get_radio_led_name - get name of radio LED
|
|
*
|
|
* mac80211 creates a radio change LED trigger for each wireless hardware
|
|
* that can be used to drive LEDs if your driver registers a LED device.
|
|
* This function returns the name (or %NULL if not configured for LEDs)
|
|
* of the trigger so you can automatically link the LED device.
|
|
*
|
|
* @hw: the hardware to get the LED trigger name for
|
|
*/
|
|
static inline char *ieee80211_get_radio_led_name(struct ieee80211_hw *hw)
|
|
{
|
|
#ifdef CONFIG_MAC80211_LEDS
|
|
return __ieee80211_get_radio_led_name(hw);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* ieee80211_unregister_hw - Unregister a hardware device
|
|
*
|
|
* This function instructs mac80211 to free allocated resources
|
|
* and unregister netdevices from the networking subsystem.
|
|
*
|
|
* @hw: the hardware to unregister
|
|
*/
|
|
void ieee80211_unregister_hw(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_free_hw - free hardware descriptor
|
|
*
|
|
* This function frees everything that was allocated, including the
|
|
* private data for the driver. You must call ieee80211_unregister_hw()
|
|
* before calling this function.
|
|
*
|
|
* @hw: the hardware to free
|
|
*/
|
|
void ieee80211_free_hw(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_restart_hw - restart hardware completely
|
|
*
|
|
* Call this function when the hardware was restarted for some reason
|
|
* (hardware error, ...) and the driver is unable to restore its state
|
|
* by itself. mac80211 assumes that at this point the driver/hardware
|
|
* is completely uninitialised and stopped, it starts the process by
|
|
* calling the ->start() operation. The driver will need to reset all
|
|
* internal state that it has prior to calling this function.
|
|
*
|
|
* @hw: the hardware to restart
|
|
*/
|
|
void ieee80211_restart_hw(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_rx - receive frame
|
|
*
|
|
* Use this function to hand received frames to mac80211. The receive
|
|
* buffer in @skb must start with an IEEE 802.11 header.
|
|
*
|
|
* This function may not be called in IRQ context. Calls to this function
|
|
* for a single hardware must be synchronized against each other. Calls to
|
|
* this function, ieee80211_rx_ni() and ieee80211_rx_irqsafe() may not be
|
|
* mixed for a single hardware.
|
|
*
|
|
* In process context use instead ieee80211_rx_ni().
|
|
*
|
|
* @hw: the hardware this frame came in on
|
|
* @skb: the buffer to receive, owned by mac80211 after this call
|
|
*/
|
|
void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb);
|
|
|
|
/**
|
|
* ieee80211_rx_irqsafe - receive frame
|
|
*
|
|
* Like ieee80211_rx() but can be called in IRQ context
|
|
* (internally defers to a tasklet.)
|
|
*
|
|
* Calls to this function, ieee80211_rx() or ieee80211_rx_ni() may not
|
|
* be mixed for a single hardware.
|
|
*
|
|
* @hw: the hardware this frame came in on
|
|
* @skb: the buffer to receive, owned by mac80211 after this call
|
|
*/
|
|
void ieee80211_rx_irqsafe(struct ieee80211_hw *hw, struct sk_buff *skb);
|
|
|
|
/**
|
|
* ieee80211_rx_ni - receive frame (in process context)
|
|
*
|
|
* Like ieee80211_rx() but can be called in process context
|
|
* (internally disables bottom halves).
|
|
*
|
|
* Calls to this function, ieee80211_rx() and ieee80211_rx_irqsafe() may
|
|
* not be mixed for a single hardware.
|
|
*
|
|
* @hw: the hardware this frame came in on
|
|
* @skb: the buffer to receive, owned by mac80211 after this call
|
|
*/
|
|
static inline void ieee80211_rx_ni(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb)
|
|
{
|
|
local_bh_disable();
|
|
ieee80211_rx(hw, skb);
|
|
local_bh_enable();
|
|
}
|
|
|
|
/**
|
|
* ieee80211_tx_status - transmit status callback
|
|
*
|
|
* Call this function for all transmitted frames after they have been
|
|
* transmitted. It is permissible to not call this function for
|
|
* multicast frames but this can affect statistics.
|
|
*
|
|
* This function may not be called in IRQ context. Calls to this function
|
|
* for a single hardware must be synchronized against each other. Calls
|
|
* to this function and ieee80211_tx_status_irqsafe() may not be mixed
|
|
* for a single hardware.
|
|
*
|
|
* @hw: the hardware the frame was transmitted by
|
|
* @skb: the frame that was transmitted, owned by mac80211 after this call
|
|
*/
|
|
void ieee80211_tx_status(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb);
|
|
|
|
/**
|
|
* ieee80211_tx_status_irqsafe - IRQ-safe transmit status callback
|
|
*
|
|
* Like ieee80211_tx_status() but can be called in IRQ context
|
|
* (internally defers to a tasklet.)
|
|
*
|
|
* Calls to this function and ieee80211_tx_status() may not be mixed for a
|
|
* single hardware.
|
|
*
|
|
* @hw: the hardware the frame was transmitted by
|
|
* @skb: the frame that was transmitted, owned by mac80211 after this call
|
|
*/
|
|
void ieee80211_tx_status_irqsafe(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb);
|
|
|
|
/**
|
|
* ieee80211_beacon_get_tim - beacon generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
* @tim_offset: pointer to variable that will receive the TIM IE offset.
|
|
* Set to 0 if invalid (in non-AP modes).
|
|
* @tim_length: pointer to variable that will receive the TIM IE length,
|
|
* (including the ID and length bytes!).
|
|
* Set to 0 if invalid (in non-AP modes).
|
|
*
|
|
* If the driver implements beaconing modes, it must use this function to
|
|
* obtain the beacon frame/template.
|
|
*
|
|
* If the beacon frames are generated by the host system (i.e., not in
|
|
* hardware/firmware), the driver uses this function to get each beacon
|
|
* frame from mac80211 -- it is responsible for calling this function
|
|
* before the beacon is needed (e.g. based on hardware interrupt).
|
|
*
|
|
* If the beacon frames are generated by the device, then the driver
|
|
* must use the returned beacon as the template and change the TIM IE
|
|
* according to the current DTIM parameters/TIM bitmap.
|
|
*
|
|
* The driver is responsible for freeing the returned skb.
|
|
*/
|
|
struct sk_buff *ieee80211_beacon_get_tim(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
u16 *tim_offset, u16 *tim_length);
|
|
|
|
/**
|
|
* ieee80211_beacon_get - beacon generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
*
|
|
* See ieee80211_beacon_get_tim().
|
|
*/
|
|
static inline struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif)
|
|
{
|
|
return ieee80211_beacon_get_tim(hw, vif, NULL, NULL);
|
|
}
|
|
|
|
/**
|
|
* ieee80211_rts_get - RTS frame generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
* @frame: pointer to the frame that is going to be protected by the RTS.
|
|
* @frame_len: the frame length (in octets).
|
|
* @frame_txctl: &struct ieee80211_tx_info of the frame.
|
|
* @rts: The buffer where to store the RTS frame.
|
|
*
|
|
* If the RTS frames are generated by the host system (i.e., not in
|
|
* hardware/firmware), the low-level driver uses this function to receive
|
|
* the next RTS frame from the 802.11 code. The low-level is responsible
|
|
* for calling this function before and RTS frame is needed.
|
|
*/
|
|
void ieee80211_rts_get(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
|
|
const void *frame, size_t frame_len,
|
|
const struct ieee80211_tx_info *frame_txctl,
|
|
struct ieee80211_rts *rts);
|
|
|
|
/**
|
|
* ieee80211_rts_duration - Get the duration field for an RTS frame
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
* @frame_len: the length of the frame that is going to be protected by the RTS.
|
|
* @frame_txctl: &struct ieee80211_tx_info of the frame.
|
|
*
|
|
* If the RTS is generated in firmware, but the host system must provide
|
|
* the duration field, the low-level driver uses this function to receive
|
|
* the duration field value in little-endian byteorder.
|
|
*/
|
|
__le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif, size_t frame_len,
|
|
const struct ieee80211_tx_info *frame_txctl);
|
|
|
|
/**
|
|
* ieee80211_ctstoself_get - CTS-to-self frame generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
* @frame: pointer to the frame that is going to be protected by the CTS-to-self.
|
|
* @frame_len: the frame length (in octets).
|
|
* @frame_txctl: &struct ieee80211_tx_info of the frame.
|
|
* @cts: The buffer where to store the CTS-to-self frame.
|
|
*
|
|
* If the CTS-to-self frames are generated by the host system (i.e., not in
|
|
* hardware/firmware), the low-level driver uses this function to receive
|
|
* the next CTS-to-self frame from the 802.11 code. The low-level is responsible
|
|
* for calling this function before and CTS-to-self frame is needed.
|
|
*/
|
|
void ieee80211_ctstoself_get(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
const void *frame, size_t frame_len,
|
|
const struct ieee80211_tx_info *frame_txctl,
|
|
struct ieee80211_cts *cts);
|
|
|
|
/**
|
|
* ieee80211_ctstoself_duration - Get the duration field for a CTS-to-self frame
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
* @frame_len: the length of the frame that is going to be protected by the CTS-to-self.
|
|
* @frame_txctl: &struct ieee80211_tx_info of the frame.
|
|
*
|
|
* If the CTS-to-self is generated in firmware, but the host system must provide
|
|
* the duration field, the low-level driver uses this function to receive
|
|
* the duration field value in little-endian byteorder.
|
|
*/
|
|
__le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
size_t frame_len,
|
|
const struct ieee80211_tx_info *frame_txctl);
|
|
|
|
/**
|
|
* ieee80211_generic_frame_duration - Calculate the duration field for a frame
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
* @frame_len: the length of the frame.
|
|
* @rate: the rate at which the frame is going to be transmitted.
|
|
*
|
|
* Calculate the duration field of some generic frame, given its
|
|
* length and transmission rate (in 100kbps).
|
|
*/
|
|
__le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
size_t frame_len,
|
|
struct ieee80211_rate *rate);
|
|
|
|
/**
|
|
* ieee80211_get_buffered_bc - accessing buffered broadcast and multicast frames
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
*
|
|
* Function for accessing buffered broadcast and multicast frames. If
|
|
* hardware/firmware does not implement buffering of broadcast/multicast
|
|
* frames when power saving is used, 802.11 code buffers them in the host
|
|
* memory. The low-level driver uses this function to fetch next buffered
|
|
* frame. In most cases, this is used when generating beacon frame. This
|
|
* function returns a pointer to the next buffered skb or NULL if no more
|
|
* buffered frames are available.
|
|
*
|
|
* Note: buffered frames are returned only after DTIM beacon frame was
|
|
* generated with ieee80211_beacon_get() and the low-level driver must thus
|
|
* call ieee80211_beacon_get() first. ieee80211_get_buffered_bc() returns
|
|
* NULL if the previous generated beacon was not DTIM, so the low-level driver
|
|
* does not need to check for DTIM beacons separately and should be able to
|
|
* use common code for all beacons.
|
|
*/
|
|
struct sk_buff *
|
|
ieee80211_get_buffered_bc(struct ieee80211_hw *hw, struct ieee80211_vif *vif);
|
|
|
|
/**
|
|
* ieee80211_get_tkip_key - get a TKIP rc4 for skb
|
|
*
|
|
* This function computes a TKIP rc4 key for an skb. It computes
|
|
* a phase 1 key if needed (iv16 wraps around). This function is to
|
|
* be used by drivers which can do HW encryption but need to compute
|
|
* to phase 1/2 key in SW.
|
|
*
|
|
* @keyconf: the parameter passed with the set key
|
|
* @skb: the skb for which the key is needed
|
|
* @type: TBD
|
|
* @key: a buffer to which the key will be written
|
|
*/
|
|
void ieee80211_get_tkip_key(struct ieee80211_key_conf *keyconf,
|
|
struct sk_buff *skb,
|
|
enum ieee80211_tkip_key_type type, u8 *key);
|
|
/**
|
|
* ieee80211_wake_queue - wake specific queue
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @queue: queue number (counted from zero).
|
|
*
|
|
* Drivers should use this function instead of netif_wake_queue.
|
|
*/
|
|
void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue);
|
|
|
|
/**
|
|
* ieee80211_stop_queue - stop specific queue
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @queue: queue number (counted from zero).
|
|
*
|
|
* Drivers should use this function instead of netif_stop_queue.
|
|
*/
|
|
void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue);
|
|
|
|
/**
|
|
* ieee80211_queue_stopped - test status of the queue
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @queue: queue number (counted from zero).
|
|
*
|
|
* Drivers should use this function instead of netif_stop_queue.
|
|
*/
|
|
|
|
int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue);
|
|
|
|
/**
|
|
* ieee80211_stop_queues - stop all queues
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
*
|
|
* Drivers should use this function instead of netif_stop_queue.
|
|
*/
|
|
void ieee80211_stop_queues(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_wake_queues - wake all queues
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
*
|
|
* Drivers should use this function instead of netif_wake_queue.
|
|
*/
|
|
void ieee80211_wake_queues(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* ieee80211_scan_completed - completed hardware scan
|
|
*
|
|
* When hardware scan offload is used (i.e. the hw_scan() callback is
|
|
* assigned) this function needs to be called by the driver to notify
|
|
* mac80211 that the scan finished.
|
|
*
|
|
* @hw: the hardware that finished the scan
|
|
* @aborted: set to true if scan was aborted
|
|
*/
|
|
void ieee80211_scan_completed(struct ieee80211_hw *hw, bool aborted);
|
|
|
|
/**
|
|
* ieee80211_iterate_active_interfaces - iterate active interfaces
|
|
*
|
|
* This function iterates over the interfaces associated with a given
|
|
* hardware that are currently active and calls the callback for them.
|
|
* This function allows the iterator function to sleep, when the iterator
|
|
* function is atomic @ieee80211_iterate_active_interfaces_atomic can
|
|
* be used.
|
|
*
|
|
* @hw: the hardware struct of which the interfaces should be iterated over
|
|
* @iterator: the iterator function to call
|
|
* @data: first argument of the iterator function
|
|
*/
|
|
void ieee80211_iterate_active_interfaces(struct ieee80211_hw *hw,
|
|
void (*iterator)(void *data, u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data);
|
|
|
|
/**
|
|
* ieee80211_iterate_active_interfaces_atomic - iterate active interfaces
|
|
*
|
|
* This function iterates over the interfaces associated with a given
|
|
* hardware that are currently active and calls the callback for them.
|
|
* This function requires the iterator callback function to be atomic,
|
|
* if that is not desired, use @ieee80211_iterate_active_interfaces instead.
|
|
*
|
|
* @hw: the hardware struct of which the interfaces should be iterated over
|
|
* @iterator: the iterator function to call, cannot sleep
|
|
* @data: first argument of the iterator function
|
|
*/
|
|
void ieee80211_iterate_active_interfaces_atomic(struct ieee80211_hw *hw,
|
|
void (*iterator)(void *data,
|
|
u8 *mac,
|
|
struct ieee80211_vif *vif),
|
|
void *data);
|
|
|
|
/**
|
|
* ieee80211_queue_work - add work onto the mac80211 workqueue
|
|
*
|
|
* Drivers and mac80211 use this to add work onto the mac80211 workqueue.
|
|
* This helper ensures drivers are not queueing work when they should not be.
|
|
*
|
|
* @hw: the hardware struct for the interface we are adding work for
|
|
* @work: the work we want to add onto the mac80211 workqueue
|
|
*/
|
|
void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work);
|
|
|
|
/**
|
|
* ieee80211_queue_delayed_work - add work onto the mac80211 workqueue
|
|
*
|
|
* Drivers and mac80211 use this to queue delayed work onto the mac80211
|
|
* workqueue.
|
|
*
|
|
* @hw: the hardware struct for the interface we are adding work for
|
|
* @dwork: delayable work to queue onto the mac80211 workqueue
|
|
* @delay: number of jiffies to wait before queueing
|
|
*/
|
|
void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
|
|
struct delayed_work *dwork,
|
|
unsigned long delay);
|
|
|
|
/**
|
|
* ieee80211_start_tx_ba_session - Start a tx Block Ack session.
|
|
* @sta: the station for which to start a BA session
|
|
* @tid: the TID to BA on.
|
|
*
|
|
* Return: success if addBA request was sent, failure otherwise
|
|
*
|
|
* Although mac80211/low level driver/user space application can estimate
|
|
* the need to start aggregation on a certain RA/TID, the session level
|
|
* will be managed by the mac80211.
|
|
*/
|
|
int ieee80211_start_tx_ba_session(struct ieee80211_sta *sta, u16 tid);
|
|
|
|
/**
|
|
* ieee80211_start_tx_ba_cb - low level driver ready to aggregate.
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf
|
|
* @ra: receiver address of the BA session recipient.
|
|
* @tid: the TID to BA on.
|
|
*
|
|
* This function must be called by low level driver once it has
|
|
* finished with preparations for the BA session.
|
|
*/
|
|
void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid);
|
|
|
|
/**
|
|
* ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate.
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf
|
|
* @ra: receiver address of the BA session recipient.
|
|
* @tid: the TID to BA on.
|
|
*
|
|
* This function must be called by low level driver once it has
|
|
* finished with preparations for the BA session.
|
|
* This version of the function is IRQ-safe.
|
|
*/
|
|
void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra,
|
|
u16 tid);
|
|
|
|
/**
|
|
* ieee80211_stop_tx_ba_session - Stop a Block Ack session.
|
|
* @sta: the station whose BA session to stop
|
|
* @tid: the TID to stop BA.
|
|
* @initiator: if indicates initiator DELBA frame will be sent.
|
|
*
|
|
* Return: error if no sta with matching da found, success otherwise
|
|
*
|
|
* Although mac80211/low level driver/user space application can estimate
|
|
* the need to stop aggregation on a certain RA/TID, the session level
|
|
* will be managed by the mac80211.
|
|
*/
|
|
int ieee80211_stop_tx_ba_session(struct ieee80211_sta *sta, u16 tid,
|
|
enum ieee80211_back_parties initiator);
|
|
|
|
/**
|
|
* ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate.
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf
|
|
* @ra: receiver address of the BA session recipient.
|
|
* @tid: the desired TID to BA on.
|
|
*
|
|
* This function must be called by low level driver once it has
|
|
* finished with preparations for the BA session tear down.
|
|
*/
|
|
void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid);
|
|
|
|
/**
|
|
* ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate.
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf
|
|
* @ra: receiver address of the BA session recipient.
|
|
* @tid: the desired TID to BA on.
|
|
*
|
|
* This function must be called by low level driver once it has
|
|
* finished with preparations for the BA session tear down.
|
|
* This version of the function is IRQ-safe.
|
|
*/
|
|
void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif, const u8 *ra,
|
|
u16 tid);
|
|
|
|
/**
|
|
* ieee80211_find_sta - find a station
|
|
*
|
|
* @vif: virtual interface to look for station on
|
|
* @addr: station's address
|
|
*
|
|
* This function must be called under RCU lock and the
|
|
* resulting pointer is only valid under RCU lock as well.
|
|
*/
|
|
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_vif *vif,
|
|
const u8 *addr);
|
|
|
|
/**
|
|
* ieee80211_find_sta_by_hw - find a station on hardware
|
|
*
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw()
|
|
* @addr: station's address
|
|
*
|
|
* This function must be called under RCU lock and the
|
|
* resulting pointer is only valid under RCU lock as well.
|
|
*
|
|
* NOTE: This function should not be used! When mac80211 is converted
|
|
* internally to properly keep track of stations on multiple
|
|
* virtual interfaces, it will not always know which station to
|
|
* return here since a single address might be used by multiple
|
|
* logical stations (e.g. consider a station connecting to another
|
|
* BSSID on the same AP hardware without disconnecting first).
|
|
*
|
|
* DO NOT USE THIS FUNCTION.
|
|
*/
|
|
struct ieee80211_sta *ieee80211_find_sta_by_hw(struct ieee80211_hw *hw,
|
|
const u8 *addr);
|
|
|
|
/**
|
|
* ieee80211_sta_block_awake - block station from waking up
|
|
* @hw: the hardware
|
|
* @pubsta: the station
|
|
* @block: whether to block or unblock
|
|
*
|
|
* Some devices require that all frames that are on the queues
|
|
* for a specific station that went to sleep are flushed before
|
|
* a poll response or frames after the station woke up can be
|
|
* delivered to that it. Note that such frames must be rejected
|
|
* by the driver as filtered, with the appropriate status flag.
|
|
*
|
|
* This function allows implementing this mode in a race-free
|
|
* manner.
|
|
*
|
|
* To do this, a driver must keep track of the number of frames
|
|
* still enqueued for a specific station. If this number is not
|
|
* zero when the station goes to sleep, the driver must call
|
|
* this function to force mac80211 to consider the station to
|
|
* be asleep regardless of the station's actual state. Once the
|
|
* number of outstanding frames reaches zero, the driver must
|
|
* call this function again to unblock the station. That will
|
|
* cause mac80211 to be able to send ps-poll responses, and if
|
|
* the station queried in the meantime then frames will also
|
|
* be sent out as a result of this. Additionally, the driver
|
|
* will be notified that the station woke up some time after
|
|
* it is unblocked, regardless of whether the station actually
|
|
* woke up while blocked or not.
|
|
*/
|
|
void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
|
|
struct ieee80211_sta *pubsta, bool block);
|
|
|
|
/**
|
|
* ieee80211_beacon_loss - inform hardware does not receive beacons
|
|
*
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
*
|
|
* When beacon filtering is enabled with IEEE80211_HW_BEACON_FILTERING and
|
|
* IEEE80211_CONF_PS is set, the driver needs to inform whenever the
|
|
* hardware is not receiving beacons with this function.
|
|
*/
|
|
void ieee80211_beacon_loss(struct ieee80211_vif *vif);
|
|
|
|
/* Rate control API */
|
|
|
|
/**
|
|
* enum rate_control_changed - flags to indicate which parameter changed
|
|
*
|
|
* @IEEE80211_RC_HT_CHANGED: The HT parameters of the operating channel have
|
|
* changed, rate control algorithm can update its internal state if needed.
|
|
*/
|
|
enum rate_control_changed {
|
|
IEEE80211_RC_HT_CHANGED = BIT(0)
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_tx_rate_control - rate control information for/from RC algo
|
|
*
|
|
* @hw: The hardware the algorithm is invoked for.
|
|
* @sband: The band this frame is being transmitted on.
|
|
* @bss_conf: the current BSS configuration
|
|
* @reported_rate: The rate control algorithm can fill this in to indicate
|
|
* which rate should be reported to userspace as the current rate and
|
|
* used for rate calculations in the mesh network.
|
|
* @rts: whether RTS will be used for this frame because it is longer than the
|
|
* RTS threshold
|
|
* @short_preamble: whether mac80211 will request short-preamble transmission
|
|
* if the selected rate supports it
|
|
* @max_rate_idx: user-requested maximum rate (not MCS for now)
|
|
* @skb: the skb that will be transmitted, the control information in it needs
|
|
* to be filled in
|
|
*/
|
|
struct ieee80211_tx_rate_control {
|
|
struct ieee80211_hw *hw;
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_bss_conf *bss_conf;
|
|
struct sk_buff *skb;
|
|
struct ieee80211_tx_rate reported_rate;
|
|
bool rts, short_preamble;
|
|
u8 max_rate_idx;
|
|
};
|
|
|
|
struct rate_control_ops {
|
|
struct module *module;
|
|
const char *name;
|
|
void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir);
|
|
void (*free)(void *priv);
|
|
|
|
void *(*alloc_sta)(void *priv, struct ieee80211_sta *sta, gfp_t gfp);
|
|
void (*rate_init)(void *priv, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta);
|
|
void (*rate_update)(void *priv, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta,
|
|
void *priv_sta, u32 changed);
|
|
void (*free_sta)(void *priv, struct ieee80211_sta *sta,
|
|
void *priv_sta);
|
|
|
|
void (*tx_status)(void *priv, struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta,
|
|
struct sk_buff *skb);
|
|
void (*get_rate)(void *priv, struct ieee80211_sta *sta, void *priv_sta,
|
|
struct ieee80211_tx_rate_control *txrc);
|
|
|
|
void (*add_sta_debugfs)(void *priv, void *priv_sta,
|
|
struct dentry *dir);
|
|
void (*remove_sta_debugfs)(void *priv, void *priv_sta);
|
|
};
|
|
|
|
static inline int rate_supported(struct ieee80211_sta *sta,
|
|
enum ieee80211_band band,
|
|
int index)
|
|
{
|
|
return (sta == NULL || sta->supp_rates[band] & BIT(index));
|
|
}
|
|
|
|
/**
|
|
* rate_control_send_low - helper for drivers for management/no-ack frames
|
|
*
|
|
* Rate control algorithms that agree to use the lowest rate to
|
|
* send management frames and NO_ACK data with the respective hw
|
|
* retries should use this in the beginning of their mac80211 get_rate
|
|
* callback. If true is returned the rate control can simply return.
|
|
* If false is returned we guarantee that sta and sta and priv_sta is
|
|
* not null.
|
|
*
|
|
* Rate control algorithms wishing to do more intelligent selection of
|
|
* rate for multicast/broadcast frames may choose to not use this.
|
|
*
|
|
* @sta: &struct ieee80211_sta pointer to the target destination. Note
|
|
* that this may be null.
|
|
* @priv_sta: private rate control structure. This may be null.
|
|
* @txrc: rate control information we sholud populate for mac80211.
|
|
*/
|
|
bool rate_control_send_low(struct ieee80211_sta *sta,
|
|
void *priv_sta,
|
|
struct ieee80211_tx_rate_control *txrc);
|
|
|
|
|
|
static inline s8
|
|
rate_lowest_index(struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sband->n_bitrates; i++)
|
|
if (rate_supported(sta, sband->band, i))
|
|
return i;
|
|
|
|
/* warn when we cannot find a rate. */
|
|
WARN_ON(1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline
|
|
bool rate_usable_index_exists(struct ieee80211_supported_band *sband,
|
|
struct ieee80211_sta *sta)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < sband->n_bitrates; i++)
|
|
if (rate_supported(sta, sband->band, i))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
int ieee80211_rate_control_register(struct rate_control_ops *ops);
|
|
void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
|
|
|
|
static inline bool
|
|
conf_is_ht20(struct ieee80211_conf *conf)
|
|
{
|
|
return conf->channel_type == NL80211_CHAN_HT20;
|
|
}
|
|
|
|
static inline bool
|
|
conf_is_ht40_minus(struct ieee80211_conf *conf)
|
|
{
|
|
return conf->channel_type == NL80211_CHAN_HT40MINUS;
|
|
}
|
|
|
|
static inline bool
|
|
conf_is_ht40_plus(struct ieee80211_conf *conf)
|
|
{
|
|
return conf->channel_type == NL80211_CHAN_HT40PLUS;
|
|
}
|
|
|
|
static inline bool
|
|
conf_is_ht40(struct ieee80211_conf *conf)
|
|
{
|
|
return conf_is_ht40_minus(conf) || conf_is_ht40_plus(conf);
|
|
}
|
|
|
|
static inline bool
|
|
conf_is_ht(struct ieee80211_conf *conf)
|
|
{
|
|
return conf->channel_type != NL80211_CHAN_NO_HT;
|
|
}
|
|
|
|
#endif /* MAC80211_H */
|