forked from Minki/linux
[MAC80211]: yet more documentation
Add more mac80211 documentation. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Michael Wu <flamingice@sourmilk.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Johannes Berg
David S. Miller
parent
c33e3f3bcd
commit
6b301cdfad
@ -98,42 +98,96 @@ struct ieee80211_rate {
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* optimizing channel utilization estimates */
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};
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/* 802.11g is backwards-compatible with 802.11b, so a wlan card can
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* actually be both in 11b and 11g modes at the same time. */
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/**
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* enum ieee80211_phymode - PHY modes
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*
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* @MODE_IEEE80211A: 5GHz as defined by 802.11a/802.11h
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* @MODE_IEEE80211B: 2.4 GHz as defined by 802.11b
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* @MODE_IEEE80211G: 2.4 GHz as defined by 802.11g (with OFDM),
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* backwards compatible with 11b mode
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* @NUM_IEEE80211_MODES: internal
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*/
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enum ieee80211_phymode {
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MODE_IEEE80211A, /* IEEE 802.11a */
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MODE_IEEE80211B, /* IEEE 802.11b only */
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MODE_IEEE80211G, /* IEEE 802.11g (and 802.11b compatibility) */
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MODE_IEEE80211A,
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MODE_IEEE80211B,
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MODE_IEEE80211G,
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/* keep last */
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NUM_IEEE80211_MODES
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};
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/**
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* struct ieee80211_hw_mode - PHY mode definition
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*
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* This structure describes the capabilities supported by the device
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* in a single PHY mode.
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*
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* @mode: the PHY mode for this definition
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* @num_channels: number of supported channels
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* @channels: pointer to array of supported channels
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* @num_rates: number of supported bitrates
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* @rates: pointer to array of supported bitrates
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* @list: internal
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*/
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struct ieee80211_hw_mode {
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int mode; /* MODE_IEEE80211... */
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int num_channels; /* Number of channels (below) */
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struct ieee80211_channel *channels; /* Array of supported channels */
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int num_rates; /* Number of rates (below) */
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struct ieee80211_rate *rates; /* Array of supported rates */
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struct list_head list; /* Internal, don't touch */
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struct list_head list;
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struct ieee80211_channel *channels;
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struct ieee80211_rate *rates;
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enum ieee80211_phymode mode;
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int num_channels;
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int num_rates;
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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.
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*
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* @aifs: arbitration interface space [0..255, -1: use default]
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* @cw_min: minimum contention window [will be a value of the form
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* 2^n-1 in the range 1..1023; 0: use default]
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* @cw_max: maximum contention window [like @cw_min]
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* @burst_time: maximum burst time in units of 0.1ms, 0 meaning disabled
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*/
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struct ieee80211_tx_queue_params {
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int aifs; /* 0 .. 255; -1 = use default */
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int cw_min; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */
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int cw_max; /* 2^n-1: 1, 3, 7, .. , 1023; 0 = use default */
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int burst_time; /* maximum burst time in 0.1 ms (i.e., 10 = 1 ms);
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* 0 = disabled */
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int aifs;
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int cw_min;
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int cw_max;
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int burst_time;
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};
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/**
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* struct ieee80211_tx_queue_stats_data - 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_data {
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unsigned int len; /* num packets in queue */
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unsigned int limit; /* queue len (soft) limit */
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unsigned int count; /* total num frames sent */
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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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enum {
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/**
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* enum ieee80211_tx_queue - transmit queue number
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*
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* These constants are used with some callbacks that take a
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* queue number to set parameters for a queue.
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*
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* @IEEE80211_TX_QUEUE_DATA0: data queue 0
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* @IEEE80211_TX_QUEUE_DATA1: data queue 1
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* @IEEE80211_TX_QUEUE_DATA2: data queue 2
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* @IEEE80211_TX_QUEUE_DATA3: data queue 3
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* @IEEE80211_TX_QUEUE_DATA4: data queue 4
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* @IEEE80211_TX_QUEUE_SVP: ??
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* @NUM_TX_DATA_QUEUES: number of data queues
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* @IEEE80211_TX_QUEUE_AFTER_BEACON: transmit queue for frames to be
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* sent after a beacon
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* @IEEE80211_TX_QUEUE_BEACON: transmit queue for beacon frames
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*/
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enum ieee80211_tx_queue {
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IEEE80211_TX_QUEUE_DATA0,
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IEEE80211_TX_QUEUE_DATA1,
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IEEE80211_TX_QUEUE_DATA2,
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@ -271,7 +325,7 @@ struct ieee80211_rx_status {
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u64 mactime;
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int freq;
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int channel;
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int phymode;
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enum ieee80211_phymode phymode;
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int ssi;
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int signal;
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int noise;
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@ -280,25 +334,65 @@ struct ieee80211_rx_status {
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int flag;
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};
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/* Transmit status. The low-level driver should provide this information
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* (the subset supported by hardware) to the 802.11 code for each transmit
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* frame. */
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/**
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* enum ieee80211_tx_status_flags - transmit status flags
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*
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* Status flags to indicate various transmit conditions.
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*
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* @IEEE80211_TX_STATUS_TX_FILTERED: The frame was not transmitted
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* because the destination STA was in powersave mode.
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*
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* @IEEE80211_TX_STATUS_ACK: Frame was acknowledged
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*/
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enum ieee80211_tx_status_flags {
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IEEE80211_TX_STATUS_TX_FILTERED = 1<<0,
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IEEE80211_TX_STATUS_ACK = 1<<1,
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};
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/**
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* struct ieee80211_tx_status - transmit status
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*
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* As much information as possible should be provided for each transmitted
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* frame with ieee80211_tx_status().
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*
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* @control: a copy of the &struct ieee80211_tx_control passed to the driver
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* in the tx() callback.
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*
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* @flags: transmit status flags, defined above
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*
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* @ack_signal: signal strength of the ACK frame
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*
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* @excessive_retries: set to 1 if the frame was retried many times
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* but not acknowledged
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*
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* @retry_count: number of retries
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*
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* @queue_length: ?? REMOVE
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* @queue_number: ?? REMOVE
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*/
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struct ieee80211_tx_status {
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/* copied ieee80211_tx_control structure */
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struct ieee80211_tx_control control;
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#define IEEE80211_TX_STATUS_TX_FILTERED (1<<0)
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#define IEEE80211_TX_STATUS_ACK (1<<1) /* whether the TX frame was ACKed */
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u32 flags; /* tx staus flags defined above */
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int ack_signal; /* measured signal strength of the ACK frame */
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int excessive_retries;
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int retry_count;
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int queue_length; /* information about TX queue */
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u8 flags;
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bool excessive_retries;
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u8 retry_count;
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int ack_signal;
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int queue_length;
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int queue_number;
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};
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/**
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* enum ieee80211_conf_flags - configuration flags
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*
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* Flags to define PHY configuration options
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*
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* @IEEE80211_CONF_SHORT_SLOT_TIME: use 802.11g short slot time
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* @IEEE80211_CONF_RADIOTAP: add radiotap header at receive time (if supported)
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*
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*/
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enum ieee80211_conf_flags {
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IEEE80211_CONF_SHORT_SLOT_TIME = 1<<0,
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IEEE80211_CONF_RADIOTAP = 1<<1,
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};
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/**
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* struct ieee80211_conf - configuration of the device
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@ -306,31 +400,37 @@ struct ieee80211_tx_status {
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* This struct indicates how the driver shall configure the hardware.
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*
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* @radio_enabled: when zero, driver is required to switch off the radio.
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* TODO make a flag
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* @channel: IEEE 802.11 channel number
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* @freq: frequency in MHz
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* @channel_val: hardware specific channel value for the channel
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* @phymode: PHY mode to activate (REMOVE)
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* @chan: channel to switch to, pointer to the channel information
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* @mode: pointer to mode definition
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* @regulatory_domain: ??
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* @beacon_int: beacon interval (TODO make interface config)
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* @flags: configuration flags defined above
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* @power_level: transmit power limit for current regulatory domain in dBm
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* @antenna_max: maximum antenna gain
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* @antenna_sel_tx: transmit antenna selection, 0: default/diversity,
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* 1/2: antenna 0/1
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* @antenna_sel_rx: receive antenna selection, like @antenna_sel_tx
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*/
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struct ieee80211_conf {
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int channel; /* IEEE 802.11 channel number */
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int freq; /* MHz */
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int channel_val; /* hw specific value for the channel */
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int phymode; /* MODE_IEEE80211A, .. */
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enum ieee80211_phymode phymode;
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struct ieee80211_channel *chan;
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struct ieee80211_hw_mode *mode;
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unsigned int regulatory_domain;
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int radio_enabled;
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int beacon_int;
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#define IEEE80211_CONF_SHORT_SLOT_TIME (1<<0) /* use IEEE 802.11g Short Slot
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* Time */
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#define IEEE80211_CONF_RADIOTAP (1<<1) /* use radiotap if supported
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check this bit at RX time */
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u32 flags; /* configuration flags defined above */
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u8 power_level; /* transmit power limit for current
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* regulatory domain; in dBm */
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u8 antenna_max; /* maximum antenna gain */
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/* 0 = default/diversity, 1 = Ant0, 2 = Ant1 */
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u32 flags;
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u8 power_level;
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u8 antenna_max;
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u8 antenna_sel_tx;
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u8 antenna_sel_rx;
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};
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