forked from Minki/linux
870abdf671
This patch adjusts the rate control API to allow multi-rate retry if supported by the driver. The ieee80211_hw struct specifies how many alternate rate selections the driver supports. Signed-off-by: Felix Fietkau <nbd@openwrt.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1893 lines
68 KiB
C
1893 lines
68 KiB
C
/*
|
|
* mac80211 <-> driver interface
|
|
*
|
|
* Copyright 2002-2005, Devicescape Software, Inc.
|
|
* Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
|
|
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef MAC80211_H
|
|
#define MAC80211_H
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/if_ether.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/wireless.h>
|
|
#include <linux/device.h>
|
|
#include <linux/ieee80211.h>
|
|
#include <net/wireless.h>
|
|
#include <net/cfg80211.h>
|
|
|
|
/**
|
|
* DOC: Introduction
|
|
*
|
|
* mac80211 is the Linux stack for 802.11 hardware that implements
|
|
* only partial functionality in hard- or firmware. This document
|
|
* defines the interface between mac80211 and low-level hardware
|
|
* drivers.
|
|
*/
|
|
|
|
/**
|
|
* DOC: Calling mac80211 from interrupts
|
|
*
|
|
* Only ieee80211_tx_status_irqsafe() and ieee80211_rx_irqsafe() can be
|
|
* called in hardware interrupt context. The low-level driver must not call any
|
|
* other functions in hardware interrupt context. If there is a need for such
|
|
* call, the low-level driver should first ACK the interrupt and perform the
|
|
* IEEE 802.11 code call after this, e.g. from a scheduled workqueue or even
|
|
* tasklet function.
|
|
*
|
|
* NOTE: If the driver opts to use the _irqsafe() functions, it may not also
|
|
* use the non-IRQ-safe functions!
|
|
*/
|
|
|
|
/**
|
|
* DOC: Warning
|
|
*
|
|
* If you're reading this document and not the header file itself, it will
|
|
* be incomplete because not all documentation has been converted yet.
|
|
*/
|
|
|
|
/**
|
|
* DOC: Frame format
|
|
*
|
|
* As a general rule, when frames are passed between mac80211 and the driver,
|
|
* they start with the IEEE 802.11 header and include the same octets that are
|
|
* sent over the air except for the FCS which should be calculated by the
|
|
* hardware.
|
|
*
|
|
* There are, however, various exceptions to this rule for advanced features:
|
|
*
|
|
* The first exception is for hardware encryption and decryption offload
|
|
* where the IV/ICV may or may not be generated in hardware.
|
|
*
|
|
* Secondly, when the hardware handles fragmentation, the frame handed to
|
|
* the driver from mac80211 is the MSDU, not the MPDU.
|
|
*
|
|
* Finally, for received frames, the driver is able to indicate that it has
|
|
* filled a radiotap header and put that in front of the frame; if it does
|
|
* not do so then mac80211 may add this under certain circumstances.
|
|
*/
|
|
|
|
/**
|
|
* enum ieee80211_notification_type - Low level driver notification
|
|
* @IEEE80211_NOTIFY_RE_ASSOC: start the re-association sequence
|
|
*/
|
|
enum ieee80211_notification_types {
|
|
IEEE80211_NOTIFY_RE_ASSOC,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_ht_bss_info - describing BSS's HT characteristics
|
|
*
|
|
* This structure describes most essential parameters needed
|
|
* to describe 802.11n HT characteristics in a BSS.
|
|
*
|
|
* @primary_channel: channel number of primery channel
|
|
* @bss_cap: 802.11n's general BSS capabilities (e.g. channel width)
|
|
* @bss_op_mode: 802.11n's BSS operation modes (e.g. HT protection)
|
|
*/
|
|
struct ieee80211_ht_bss_info {
|
|
u8 primary_channel;
|
|
u8 bss_cap; /* use IEEE80211_HT_IE_CHA_ */
|
|
u8 bss_op_mode; /* use IEEE80211_HT_IE_ */
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_max_queues - maximum number of queues
|
|
*
|
|
* @IEEE80211_MAX_QUEUES: Maximum number of regular device queues.
|
|
* @IEEE80211_MAX_AMPDU_QUEUES: Maximum number of queues usable
|
|
* for A-MPDU operation.
|
|
*/
|
|
enum ieee80211_max_queues {
|
|
IEEE80211_MAX_QUEUES = 16,
|
|
IEEE80211_MAX_AMPDU_QUEUES = 16,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_tx_queue_params - transmit queue configuration
|
|
*
|
|
* The information provided in this structure is required for QoS
|
|
* transmit queue configuration. Cf. IEEE 802.11 7.3.2.29.
|
|
*
|
|
* @aifs: arbitration interface space [0..255]
|
|
* @cw_min: minimum contention window [a value of the form
|
|
* 2^n-1 in the range 1..32767]
|
|
* @cw_max: maximum contention window [like @cw_min]
|
|
* @txop: maximum burst time in units of 32 usecs, 0 meaning disabled
|
|
*/
|
|
struct ieee80211_tx_queue_params {
|
|
u16 txop;
|
|
u16 cw_min;
|
|
u16 cw_max;
|
|
u8 aifs;
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_tx_queue_stats - transmit queue statistics
|
|
*
|
|
* @len: number of packets in queue
|
|
* @limit: queue length limit
|
|
* @count: number of frames sent
|
|
*/
|
|
struct ieee80211_tx_queue_stats {
|
|
unsigned int len;
|
|
unsigned int limit;
|
|
unsigned int count;
|
|
};
|
|
|
|
struct ieee80211_low_level_stats {
|
|
unsigned int dot11ACKFailureCount;
|
|
unsigned int dot11RTSFailureCount;
|
|
unsigned int dot11FCSErrorCount;
|
|
unsigned int dot11RTSSuccessCount;
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_bss_change - BSS change notification flags
|
|
*
|
|
* These flags are used with the bss_info_changed() callback
|
|
* to indicate which BSS parameter changed.
|
|
*
|
|
* @BSS_CHANGED_ASSOC: association status changed (associated/disassociated),
|
|
* also implies a change in the AID.
|
|
* @BSS_CHANGED_ERP_CTS_PROT: CTS protection changed
|
|
* @BSS_CHANGED_ERP_PREAMBLE: preamble changed
|
|
* @BSS_CHANGED_ERP_SLOT: slot timing changed
|
|
* @BSS_CHANGED_HT: 802.11n parameters changed
|
|
* @BSS_CHANGED_BASIC_RATES: Basic rateset changed
|
|
*/
|
|
enum ieee80211_bss_change {
|
|
BSS_CHANGED_ASSOC = 1<<0,
|
|
BSS_CHANGED_ERP_CTS_PROT = 1<<1,
|
|
BSS_CHANGED_ERP_PREAMBLE = 1<<2,
|
|
BSS_CHANGED_ERP_SLOT = 1<<3,
|
|
BSS_CHANGED_HT = 1<<4,
|
|
BSS_CHANGED_BASIC_RATES = 1<<5,
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_bss_conf - holds the BSS's changing parameters
|
|
*
|
|
* This structure keeps information about a BSS (and an association
|
|
* to that BSS) that can change during the lifetime of the BSS.
|
|
*
|
|
* @assoc: association status
|
|
* @aid: association ID number, valid only when @assoc is true
|
|
* @use_cts_prot: use CTS protection
|
|
* @use_short_preamble: use 802.11b short preamble
|
|
* @use_short_slot: use short slot time (only relevant for ERP)
|
|
* @dtim_period: num of beacons before the next DTIM, for PSM
|
|
* @timestamp: beacon timestamp
|
|
* @beacon_int: beacon interval
|
|
* @assoc_capability: capabilities taken from assoc resp
|
|
* @assoc_ht: association in HT mode
|
|
* @ht_conf: ht capabilities
|
|
* @ht_bss_conf: ht extended capabilities
|
|
* @basic_rates: bitmap of basic rates, each bit stands for an
|
|
* index into the rate table configured by the driver in
|
|
* the current band.
|
|
*/
|
|
struct ieee80211_bss_conf {
|
|
/* association related data */
|
|
bool assoc;
|
|
u16 aid;
|
|
/* erp related data */
|
|
bool use_cts_prot;
|
|
bool use_short_preamble;
|
|
bool use_short_slot;
|
|
u8 dtim_period;
|
|
u16 beacon_int;
|
|
u16 assoc_capability;
|
|
u64 timestamp;
|
|
u64 basic_rates;
|
|
/* ht related data */
|
|
bool assoc_ht;
|
|
struct ieee80211_ht_info *ht_conf;
|
|
struct ieee80211_ht_bss_info *ht_bss_conf;
|
|
};
|
|
|
|
/**
|
|
* enum mac80211_tx_control_flags - flags to describe transmission information/status
|
|
*
|
|
* These flags are used with the @flags member of &ieee80211_tx_info.
|
|
*
|
|
* @IEEE80211_TX_CTL_REQ_TX_STATUS: request TX status callback for this frame.
|
|
* @IEEE80211_TX_CTL_USE_RTS_CTS: use RTS-CTS before sending frame
|
|
* @IEEE80211_TX_CTL_USE_CTS_PROTECT: use CTS protection for the frame (e.g.,
|
|
* for combined 802.11g / 802.11b networks)
|
|
* @IEEE80211_TX_CTL_NO_ACK: tell the low level not to wait for an ack
|
|
* @IEEE80211_TX_CTL_RATE_CTRL_PROBE: TBD
|
|
* @IEEE80211_TX_CTL_CLEAR_PS_FILT: clear powersave filter for destination
|
|
* station
|
|
* @IEEE80211_TX_CTL_REQUEUE: TBD
|
|
* @IEEE80211_TX_CTL_FIRST_FRAGMENT: this is a first fragment of the frame
|
|
* @IEEE80211_TX_CTL_SHORT_PREAMBLE: TBD
|
|
* @IEEE80211_TX_CTL_LONG_RETRY_LIMIT: this frame should be send using the
|
|
* through set_retry_limit configured long retry value
|
|
* @IEEE80211_TX_CTL_SEND_AFTER_DTIM: send this frame after DTIM beacon
|
|
* @IEEE80211_TX_CTL_AMPDU: this frame should be sent as part of an A-MPDU
|
|
* @IEEE80211_TX_CTL_OFDM_HT: this frame can be sent in HT OFDM rates. number
|
|
* of streams when this flag is on can be extracted from antenna_sel_tx,
|
|
* so if 1 antenna is marked use SISO, 2 antennas marked use MIMO, n
|
|
* antennas marked use MIMO_n.
|
|
* @IEEE80211_TX_CTL_GREEN_FIELD: use green field protection for this frame
|
|
* @IEEE80211_TX_CTL_40_MHZ_WIDTH: send this frame using 40 Mhz channel width
|
|
* @IEEE80211_TX_CTL_DUP_DATA: duplicate data frame on both 20 Mhz channels
|
|
* @IEEE80211_TX_CTL_SHORT_GI: send this frame using short guard interval
|
|
* @IEEE80211_TX_CTL_INJECTED: TBD
|
|
* @IEEE80211_TX_STAT_TX_FILTERED: The frame was not transmitted
|
|
* because the destination STA was in powersave mode.
|
|
* @IEEE80211_TX_STAT_ACK: Frame was acknowledged
|
|
* @IEEE80211_TX_STAT_AMPDU: The frame was aggregated, so status
|
|
* is for the whole aggregation.
|
|
* @IEEE80211_TX_STAT_AMPDU_NO_BACK: no block ack was returned,
|
|
* so consider using block ack request (BAR).
|
|
* @IEEE80211_TX_CTL_ASSIGN_SEQ: The driver has to assign a sequence
|
|
* number to this frame, taking care of not overwriting the fragment
|
|
* number and increasing the sequence number only when the
|
|
* IEEE80211_TX_CTL_FIRST_FRAGMENT flags is set. mac80211 will properly
|
|
* assign sequence numbers to QoS-data frames but cannot do so correctly
|
|
* for non-QoS-data and management frames because beacons need them from
|
|
* that counter as well and mac80211 cannot guarantee proper sequencing.
|
|
* If this flag is set, the driver should instruct the hardware to
|
|
* assign a sequence number to the frame or assign one itself. Cf. IEEE
|
|
* 802.11-2007 7.1.3.4.1 paragraph 3. This flag will always be set for
|
|
* beacons always be clear for frames without a sequence number field.
|
|
*/
|
|
enum mac80211_tx_control_flags {
|
|
IEEE80211_TX_CTL_REQ_TX_STATUS = BIT(0),
|
|
IEEE80211_TX_CTL_USE_RTS_CTS = BIT(2),
|
|
IEEE80211_TX_CTL_USE_CTS_PROTECT = BIT(3),
|
|
IEEE80211_TX_CTL_NO_ACK = BIT(4),
|
|
IEEE80211_TX_CTL_RATE_CTRL_PROBE = BIT(5),
|
|
IEEE80211_TX_CTL_CLEAR_PS_FILT = BIT(6),
|
|
IEEE80211_TX_CTL_REQUEUE = BIT(7),
|
|
IEEE80211_TX_CTL_FIRST_FRAGMENT = BIT(8),
|
|
IEEE80211_TX_CTL_SHORT_PREAMBLE = BIT(9),
|
|
IEEE80211_TX_CTL_LONG_RETRY_LIMIT = BIT(10),
|
|
IEEE80211_TX_CTL_SEND_AFTER_DTIM = BIT(12),
|
|
IEEE80211_TX_CTL_AMPDU = BIT(13),
|
|
IEEE80211_TX_CTL_OFDM_HT = BIT(14),
|
|
IEEE80211_TX_CTL_GREEN_FIELD = BIT(15),
|
|
IEEE80211_TX_CTL_40_MHZ_WIDTH = BIT(16),
|
|
IEEE80211_TX_CTL_DUP_DATA = BIT(17),
|
|
IEEE80211_TX_CTL_SHORT_GI = BIT(18),
|
|
IEEE80211_TX_CTL_INJECTED = BIT(19),
|
|
IEEE80211_TX_STAT_TX_FILTERED = BIT(20),
|
|
IEEE80211_TX_STAT_ACK = BIT(21),
|
|
IEEE80211_TX_STAT_AMPDU = BIT(22),
|
|
IEEE80211_TX_STAT_AMPDU_NO_BACK = BIT(23),
|
|
IEEE80211_TX_CTL_ASSIGN_SEQ = BIT(24),
|
|
};
|
|
|
|
|
|
#define IEEE80211_TX_INFO_DRIVER_DATA_SIZE \
|
|
(sizeof(((struct sk_buff *)0)->cb) - 8)
|
|
#define IEEE80211_TX_INFO_DRIVER_DATA_PTRS \
|
|
(IEEE80211_TX_INFO_DRIVER_DATA_SIZE / sizeof(void *))
|
|
|
|
/* maximum number of alternate rate retry stages */
|
|
#define IEEE80211_TX_MAX_ALTRATE 3
|
|
|
|
/**
|
|
* struct ieee80211_tx_altrate - alternate rate selection/status
|
|
*
|
|
* @rate_idx: rate index to attempt to send with
|
|
* @limit: number of retries before fallback
|
|
*/
|
|
struct ieee80211_tx_altrate {
|
|
s8 rate_idx;
|
|
u8 limit;
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_tx_info - skb transmit information
|
|
*
|
|
* This structure is placed in skb->cb for three uses:
|
|
* (1) mac80211 TX control - mac80211 tells the driver what to do
|
|
* (2) driver internal use (if applicable)
|
|
* (3) TX status information - driver tells mac80211 what happened
|
|
*
|
|
* The TX control's sta pointer is only valid during the ->tx call,
|
|
* it may be NULL.
|
|
*
|
|
* @flags: transmit info flags, defined above
|
|
* @band: TBD
|
|
* @tx_rate_idx: TBD
|
|
* @antenna_sel_tx: TBD
|
|
* @control: union for control data
|
|
* @status: union for status data
|
|
* @driver_data: array of driver_data pointers
|
|
* @retry_count: number of retries
|
|
* @excessive_retries: set to 1 if the frame was retried many times
|
|
* but not acknowledged
|
|
* @ampdu_ack_len: number of aggregated frames.
|
|
* relevant only if IEEE80211_TX_STATUS_AMPDU was set.
|
|
* @ampdu_ack_map: block ack bit map for the aggregation.
|
|
* relevant only if IEEE80211_TX_STATUS_AMPDU was set.
|
|
* @ack_signal: signal strength of the ACK frame
|
|
*/
|
|
struct ieee80211_tx_info {
|
|
/* common information */
|
|
u32 flags;
|
|
u8 band;
|
|
s8 tx_rate_idx;
|
|
u8 antenna_sel_tx;
|
|
|
|
/* 1 byte hole */
|
|
|
|
union {
|
|
struct {
|
|
/* NB: vif can be NULL for injected frames */
|
|
struct ieee80211_vif *vif;
|
|
struct ieee80211_key_conf *hw_key;
|
|
struct ieee80211_sta *sta;
|
|
unsigned long jiffies;
|
|
s8 rts_cts_rate_idx;
|
|
u8 retry_limit;
|
|
struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE];
|
|
} control;
|
|
struct {
|
|
u64 ampdu_ack_map;
|
|
int ack_signal;
|
|
struct ieee80211_tx_altrate retries[IEEE80211_TX_MAX_ALTRATE + 1];
|
|
u8 retry_count;
|
|
bool excessive_retries;
|
|
u8 ampdu_ack_len;
|
|
} status;
|
|
void *driver_data[IEEE80211_TX_INFO_DRIVER_DATA_PTRS];
|
|
};
|
|
};
|
|
|
|
static inline struct ieee80211_tx_info *IEEE80211_SKB_CB(struct sk_buff *skb)
|
|
{
|
|
return (struct ieee80211_tx_info *)skb->cb;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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_RADIOTAP: This frame starts with a radiotap header.
|
|
* @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
|
|
*/
|
|
enum mac80211_rx_flags {
|
|
RX_FLAG_MMIC_ERROR = 1<<0,
|
|
RX_FLAG_DECRYPTED = 1<<1,
|
|
RX_FLAG_RADIOTAP = 1<<2,
|
|
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
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @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
|
|
* @flag: %RX_FLAG_*
|
|
*/
|
|
struct ieee80211_rx_status {
|
|
u64 mactime;
|
|
enum ieee80211_band band;
|
|
int freq;
|
|
int signal;
|
|
int noise;
|
|
int qual;
|
|
int antenna;
|
|
int rate_idx;
|
|
int flag;
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_conf_flags - configuration flags
|
|
*
|
|
* Flags to define PHY configuration options
|
|
*
|
|
* @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time
|
|
* @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
|
|
* @IEEE80211_CONF_SUPPORT_HT_MODE: use 802.11n HT capabilities (if supported)
|
|
* @IEEE80211_CONF_PS: Enable 802.11 power save mode
|
|
*/
|
|
enum ieee80211_conf_flags {
|
|
/*
|
|
* TODO: IEEE80211_CONF_SHORT_SLOT_TIME will be removed once drivers
|
|
* have been converted to use bss_info_changed() for slot time
|
|
* configuration
|
|
*/
|
|
IEEE80211_CONF_SHORT_SLOT_TIME = (1<<0),
|
|
IEEE80211_CONF_RADIOTAP = (1<<1),
|
|
IEEE80211_CONF_SUPPORT_HT_MODE = (1<<2),
|
|
IEEE80211_CONF_PS = (1<<3),
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_conf - configuration of the device
|
|
*
|
|
* This struct indicates how the driver shall configure the hardware.
|
|
*
|
|
* @radio_enabled: when zero, driver is required to switch off the radio.
|
|
* TODO make a flag
|
|
* @beacon_int: beacon interval (TODO make interface config)
|
|
* @listen_interval: listen interval in units of beacon interval
|
|
* @flags: configuration flags defined above
|
|
* @power_level: requested transmit power (in dBm)
|
|
* @max_antenna_gain: maximum antenna gain (in dBi)
|
|
* @antenna_sel_tx: transmit antenna selection, 0: default/diversity,
|
|
* 1/2: antenna 0/1
|
|
* @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx
|
|
* @ht_conf: describes current self configuration of 802.11n HT capabilies
|
|
* @ht_bss_conf: describes current BSS configuration of 802.11n HT parameters
|
|
* @channel: the channel to tune to
|
|
*/
|
|
struct ieee80211_conf {
|
|
int radio_enabled;
|
|
|
|
int beacon_int;
|
|
u16 listen_interval;
|
|
u32 flags;
|
|
int power_level;
|
|
int max_antenna_gain;
|
|
u8 antenna_sel_tx;
|
|
u8 antenna_sel_rx;
|
|
|
|
struct ieee80211_channel *channel;
|
|
|
|
struct ieee80211_ht_info ht_conf;
|
|
struct ieee80211_ht_bss_info ht_bss_conf;
|
|
};
|
|
|
|
/**
|
|
* 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
|
|
* @drv_priv: data area for driver use, will always be aligned to
|
|
* sizeof(void *).
|
|
*/
|
|
struct ieee80211_vif {
|
|
enum nl80211_iftype type;
|
|
/* 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_if_conf_change - interface config change flags
|
|
*
|
|
* @IEEE80211_IFCC_BSSID: The BSSID changed.
|
|
* @IEEE80211_IFCC_SSID: The SSID changed.
|
|
* @IEEE80211_IFCC_BEACON: The beacon for this interface changed
|
|
* (currently AP and MESH only), use ieee80211_beacon_get().
|
|
*/
|
|
enum ieee80211_if_conf_change {
|
|
IEEE80211_IFCC_BSSID = BIT(0),
|
|
IEEE80211_IFCC_SSID = BIT(1),
|
|
IEEE80211_IFCC_BEACON = BIT(2),
|
|
};
|
|
|
|
/**
|
|
* struct ieee80211_if_conf - configuration of an interface
|
|
*
|
|
* @changed: parameters that have changed, see &enum ieee80211_if_conf_change.
|
|
* @bssid: BSSID of the network we are associated to/creating.
|
|
* @ssid: used (together with @ssid_len) by drivers for hardware that
|
|
* generate beacons independently. The pointer is valid only during the
|
|
* config_interface() call, so copy the value somewhere if you need
|
|
* it.
|
|
* @ssid_len: length of the @ssid field.
|
|
*
|
|
* This structure is passed to the config_interface() callback of
|
|
* &struct ieee80211_hw.
|
|
*/
|
|
struct ieee80211_if_conf {
|
|
u32 changed;
|
|
u8 *bssid;
|
|
u8 *ssid;
|
|
size_t ssid_len;
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_key_alg - key algorithm
|
|
* @ALG_WEP: WEP40 or WEP104
|
|
* @ALG_TKIP: TKIP
|
|
* @ALG_CCMP: CCMP (AES)
|
|
*/
|
|
enum ieee80211_key_alg {
|
|
ALG_WEP,
|
|
ALG_TKIP,
|
|
ALG_CCMP,
|
|
};
|
|
|
|
/**
|
|
* enum ieee80211_key_len - key length
|
|
* @LEN_WEP40: WEP 5-byte long key
|
|
* @LEN_WEP104: WEP 13-byte long key
|
|
*/
|
|
enum ieee80211_key_len {
|
|
LEN_WEP40 = 5,
|
|
LEN_WEP104 = 13,
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
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,
|
|
};
|
|
|
|
/**
|
|
* 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)
|
|
*
|
|
*/
|
|
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_info: HT capabilities of this STA
|
|
* @drv_priv: data area for driver use, will always be aligned to
|
|
* sizeof(void *), size is determined in hw information.
|
|
*/
|
|
struct ieee80211_sta {
|
|
u64 supp_rates[IEEE80211_NUM_BANDS];
|
|
u8 addr[ETH_ALEN];
|
|
u16 aid;
|
|
struct ieee80211_ht_info ht_info;
|
|
|
|
/* 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.
|
|
*
|
|
* @STA_NOTIFY_ADD: a station was added to the station table
|
|
* @STA_NOTIFY_REMOVE: a station being removed from the station table
|
|
*/
|
|
enum sta_notify_cmd {
|
|
STA_NOTIFY_ADD, STA_NOTIFY_REMOVE
|
|
};
|
|
|
|
/**
|
|
* 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_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_DB:
|
|
* Hardware gives signal values in dB, decibel difference from an
|
|
* arbitrary, fixed reference. We expect values between 0 and @max_signal.
|
|
* If possible please provide 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
|
|
*/
|
|
enum ieee80211_hw_flags {
|
|
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_DB = 1<<6,
|
|
IEEE80211_HW_SIGNAL_DBM = 1<<7,
|
|
IEEE80211_HW_NOISE_DBM = 1<<8,
|
|
IEEE80211_HW_SPECTRUM_MGMT = 1<<9,
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @workqueue: single threaded workqueue available for driver use,
|
|
* allocated by mac80211 on registration and flushed when an
|
|
* interface is removed.
|
|
* NOTICE: All work performed on this workqueue should NEVER
|
|
* acquire the RTNL lock (i.e. Don't use the function
|
|
* ieee80211_iterate_active_interfaces())
|
|
*
|
|
* @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.
|
|
*
|
|
* @ampdu_queues: number of available hardware transmit queues
|
|
* for A-MPDU packets, these have no access parameters
|
|
* because they're used only for A-MPDU frames. Note that
|
|
* mac80211 will not currently use any of the regular queues
|
|
* for aggregation.
|
|
*
|
|
* @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_altrates: maximum number of alternate rate retry stages
|
|
* @max_altrate_tries: maximum number of tries for each stage
|
|
*/
|
|
struct ieee80211_hw {
|
|
struct ieee80211_conf conf;
|
|
struct wiphy *wiphy;
|
|
struct workqueue_struct *workqueue;
|
|
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 ampdu_queues;
|
|
u16 max_listen_interval;
|
|
s8 max_signal;
|
|
u8 max_altrates;
|
|
u8 max_altrate_tries;
|
|
};
|
|
|
|
struct ieee80211_hw *wiphy_to_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 permanenet 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 int ieee80211_num_regular_queues(struct ieee80211_hw *hw)
|
|
{
|
|
return hw->queues;
|
|
}
|
|
|
|
static inline int ieee80211_num_queues(struct ieee80211_hw *hw)
|
|
{
|
|
return hw->queues + hw->ampdu_queues;
|
|
}
|
|
|
|
static inline struct ieee80211_rate *
|
|
ieee80211_get_tx_rate(const struct ieee80211_hw *hw,
|
|
const struct ieee80211_tx_info *c)
|
|
{
|
|
if (WARN_ON(c->tx_rate_idx < 0))
|
|
return NULL;
|
|
return &hw->wiphy->bands[c->band]->bitrates[c->tx_rate_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.retries[idx].rate_idx < 0)
|
|
return NULL;
|
|
return &hw->wiphy->bands[c->band]->bitrates[c->control.retries[idx].rate_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 an @address parameter that will be
|
|
* the broadcast address for default keys, the other station's hardware
|
|
* address for individual keys or the zero address for keys that will
|
|
* be used only for transmission.
|
|
* Multiple transmission keys with the same key index may be used when
|
|
* VLANs are configured for an access point.
|
|
*
|
|
* The @local_address parameter will always be set to our own address,
|
|
* this is only relevant if you support multiple local addresses.
|
|
*
|
|
* 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 udpate_tkip_key only. The trigger that makes mac80211 call this
|
|
* handler is software decryption with wrap around of iv16.
|
|
*/
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* The configure_filter() callback is invoked with the parameters
|
|
* @mc_count and @mc_list for the combined multicast address list
|
|
* of all virtual interfaces, @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, if PROMISC_IN_BSS is not set then
|
|
* only those addressed to this station
|
|
*
|
|
* @FIF_OTHER_BSS: pass frames destined to other BSSes
|
|
*/
|
|
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,
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
* @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
|
|
*/
|
|
enum ieee80211_ampdu_mlme_action {
|
|
IEEE80211_AMPDU_RX_START,
|
|
IEEE80211_AMPDU_RX_STOP,
|
|
IEEE80211_AMPDU_TX_START,
|
|
IEEE80211_AMPDU_TX_STOP,
|
|
};
|
|
|
|
/**
|
|
* 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.
|
|
* 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.
|
|
* Must be implemented.
|
|
*
|
|
* @add_interface: Called when a netdevice attached to the hardware is
|
|
* enabled. Because it is not called for monitor mode devices, @open
|
|
* 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.
|
|
*
|
|
* @config_interface: Handler for configuration requests related to interfaces
|
|
* (e.g. BSSID changes.)
|
|
*
|
|
* @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.
|
|
*
|
|
* @configure_filter: Configure the device's RX filter.
|
|
* See the section "Frame filtering" for more information.
|
|
* This callback must be implemented and atomic.
|
|
*
|
|
* @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 interface with the
|
|
* given local_address is enabled.
|
|
*
|
|
* @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. When the scan finishes, ieee80211_scan_completed() must be
|
|
* called; note that it also must be called when the scan cannot finish
|
|
* because the hardware is turned off! Anything else is a bug!
|
|
*
|
|
* @get_stats: return low-level statistics
|
|
*
|
|
* @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)
|
|
*
|
|
* @set_frag_threshold: Configuration of fragmentation threshold. Assign this if
|
|
* the device does fragmentation by itself; if this method is assigned then
|
|
* the stack will not do fragmentation.
|
|
*
|
|
* @set_retry_limit: Configuration of retry limits (if device needs it)
|
|
*
|
|
* @sta_notify: Notifies low level driver about addition or removal
|
|
* of assocaited station or AP.
|
|
*
|
|
* @conf_tx: Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
|
|
* bursting) for a hardware TX queue.
|
|
*
|
|
* @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 +
|
|
* hw->ampdu_queues items.
|
|
*
|
|
* @get_tsf: Get the current TSF timer value from firmware/hardware. Currently,
|
|
* this is only used for IBSS mode debugging and, as such, is not a
|
|
* required function. Must be atomic.
|
|
*
|
|
* @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.
|
|
*
|
|
* @conf_ht: Configures low level driver with 802.11n HT data. Must be atomic.
|
|
*
|
|
* @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.
|
|
*/
|
|
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, struct ieee80211_conf *conf);
|
|
int (*config_interface)(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
struct ieee80211_if_conf *conf);
|
|
void (*bss_info_changed)(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif,
|
|
struct ieee80211_bss_conf *info,
|
|
u32 changed);
|
|
void (*configure_filter)(struct ieee80211_hw *hw,
|
|
unsigned int changed_flags,
|
|
unsigned int *total_flags,
|
|
int mc_count, struct dev_addr_list *mc_list);
|
|
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,
|
|
const u8 *local_address, const u8 *address,
|
|
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, u8 *ssid, size_t len);
|
|
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);
|
|
int (*set_frag_threshold)(struct ieee80211_hw *hw, u32 value);
|
|
int (*set_retry_limit)(struct ieee80211_hw *hw,
|
|
u32 short_retry, u32 long_retr);
|
|
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 (*reset_tsf)(struct ieee80211_hw *hw);
|
|
int (*tx_last_beacon)(struct ieee80211_hw *hw);
|
|
int (*ampdu_action)(struct ieee80211_hw *hw,
|
|
enum ieee80211_ampdu_mlme_action action,
|
|
struct ieee80211_sta *sta, u16 tid, u16 *ssn);
|
|
};
|
|
|
|
/**
|
|
* 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);
|
|
|
|
/* trick to avoid symbol clashes with the ieee80211 subsystem */
|
|
void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status);
|
|
|
|
/**
|
|
* 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 or a radiotap
|
|
* header if %RX_FLAG_RADIOTAP is set in the @status flags.
|
|
*
|
|
* 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_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
|
|
* @status: status of this frame; the status pointer need not be valid
|
|
* after this function returns
|
|
*/
|
|
static inline void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status)
|
|
{
|
|
__ieee80211_rx(hw, skb, status);
|
|
}
|
|
|
|
/**
|
|
* ieee80211_rx_irqsafe - receive frame
|
|
*
|
|
* Like ieee80211_rx() but can be called in IRQ context
|
|
* (internally defers to a tasklet.)
|
|
*
|
|
* Calls to this function and ieee80211_rx() 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
|
|
* @status: status of this frame; the status pointer need not be valid
|
|
* after this function returns and is not freed by mac80211,
|
|
* it is recommended that it points to a stack area
|
|
*/
|
|
void ieee80211_rx_irqsafe(struct ieee80211_hw *hw,
|
|
struct sk_buff *skb,
|
|
struct ieee80211_rx_status *status);
|
|
|
|
/**
|
|
* 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 - beacon generation function
|
|
* @hw: pointer obtained from ieee80211_alloc_hw().
|
|
* @vif: &struct ieee80211_vif pointer from &struct ieee80211_if_init_conf.
|
|
* @control: will be filled with information needed to send this beacon.
|
|
*
|
|
* If the beacon frames are generated by the host system (i.e., not in
|
|
* hardware/firmware), the low-level driver uses this function to receive
|
|
* the next beacon frame from the 802.11 code. The low-level is responsible
|
|
* for calling this function before beacon data is needed (e.g., based on
|
|
* hardware interrupt). Returned skb is used only once and low-level driver
|
|
* is responsible of freeing it.
|
|
*/
|
|
struct sk_buff *ieee80211_beacon_get(struct ieee80211_hw *hw,
|
|
struct ieee80211_vif *vif);
|
|
|
|
/**
|
|
* 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.
|
|
* @control: will be filled with information needed to send returned frame.
|
|
*
|
|
* 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_hdrlen_from_skb - get header length from data
|
|
*
|
|
* Given an skb with a raw 802.11 header at the data pointer this function
|
|
* returns the 802.11 header length in bytes (not including encryption
|
|
* headers). If the data in the sk_buff is too short to contain a valid 802.11
|
|
* header the function returns 0.
|
|
*
|
|
* @skb: the frame
|
|
*/
|
|
unsigned int ieee80211_get_hdrlen_from_skb(const struct sk_buff *skb);
|
|
|
|
/**
|
|
* ieee80211_hdrlen - get header length in bytes from frame control
|
|
* @fc: frame control field in little-endian format
|
|
*/
|
|
unsigned int ieee80211_hdrlen(__le16 fc);
|
|
|
|
/**
|
|
* 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
|
|
* @rc4key: a buffer to which the key will be written
|
|
* @type: TBD
|
|
* @key: TBD
|
|
*/
|
|
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
|
|
*/
|
|
void ieee80211_scan_completed(struct ieee80211_hw *hw);
|
|
|
|
/**
|
|
* 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_start_tx_ba_session - Start a tx Block Ack session.
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @ra: receiver address of the BA session recipient
|
|
* @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_hw *hw, u8 *ra, u16 tid);
|
|
|
|
/**
|
|
* ieee80211_start_tx_ba_cb - low level driver ready to aggregate.
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @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_hw *hw, u8 *ra, u16 tid);
|
|
|
|
/**
|
|
* ieee80211_start_tx_ba_cb_irqsafe - low level driver ready to aggregate.
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @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_hw *hw, const u8 *ra,
|
|
u16 tid);
|
|
|
|
/**
|
|
* ieee80211_stop_tx_ba_session - Stop a Block Ack session.
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @ra: receiver address of the BA session recipient
|
|
* @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_hw *hw,
|
|
u8 *ra, u16 tid,
|
|
enum ieee80211_back_parties initiator);
|
|
|
|
/**
|
|
* ieee80211_stop_tx_ba_cb - low level driver ready to stop aggregate.
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @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_hw *hw, u8 *ra, u8 tid);
|
|
|
|
/**
|
|
* ieee80211_stop_tx_ba_cb_irqsafe - low level driver ready to stop aggregate.
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @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_hw *hw, const u8 *ra,
|
|
u16 tid);
|
|
|
|
/**
|
|
* ieee80211_notify_mac - low level driver notification
|
|
* @hw: pointer as obtained from ieee80211_alloc_hw().
|
|
* @notif_type: enum ieee80211_notification_types
|
|
*
|
|
* This function must be called by low level driver to inform mac80211 of
|
|
* low level driver status change or force mac80211 to re-assoc for low
|
|
* level driver internal error that require re-assoc.
|
|
*/
|
|
void ieee80211_notify_mac(struct ieee80211_hw *hw,
|
|
enum ieee80211_notification_types notif_type);
|
|
|
|
/**
|
|
* ieee80211_find_sta - find a station
|
|
*
|
|
* @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.
|
|
*/
|
|
struct ieee80211_sta *ieee80211_find_sta(struct ieee80211_hw *hw,
|
|
const u8 *addr);
|
|
|
|
|
|
/* Rate control API */
|
|
/**
|
|
* struct rate_selection - rate information for/from rate control algorithms
|
|
*
|
|
* @rate_idx: selected transmission rate index
|
|
* @nonerp_idx: Non-ERP rate to use instead if ERP cannot be used
|
|
* @probe_idx: rate for probing (or -1)
|
|
* @max_rate_idx: maximum rate index that can be used, this is
|
|
* input to the algorithm and will be enforced
|
|
*/
|
|
struct rate_selection {
|
|
s8 rate_idx, nonerp_idx, probe_idx, max_rate_idx;
|
|
};
|
|
|
|
struct rate_control_ops {
|
|
struct module *module;
|
|
const char *name;
|
|
void *(*alloc)(struct ieee80211_hw *hw, struct dentry *debugfsdir);
|
|
void (*clear)(void *priv);
|
|
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 (*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_supported_band *sband,
|
|
struct ieee80211_sta *sta, void *priv_sta,
|
|
struct sk_buff *skb,
|
|
struct rate_selection *sel);
|
|
|
|
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));
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
|
|
int ieee80211_rate_control_register(struct rate_control_ops *ops);
|
|
void ieee80211_rate_control_unregister(struct rate_control_ops *ops);
|
|
|
|
#endif /* MAC80211_H */
|