struct_ieee80211_hw

Langue: en

Autres versions - même langue

Version: May 2009 (fedora - 06/07/09)

Section: 9 (Appels noyau Linux)

Sommaire

NAME

struct_ieee80211_hw - hardware information and state

SYNOPSIS

 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_rates;
   u8 max_rate_tries;
 };

MEMBERS

conf


struct ieee80211_conf, device configuration, don't use.

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.

workqueue

single threaded workqueue available for driver use, allocated by mac80211 on registration and flushed when an interface is removed.

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.

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.

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.

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.

max_listen_interval

max listen interval in units of beacon interval that HW supports

max_signal

Maximum value for signal (rssi) in RX information, used only when IEEE80211_HW_SIGNAL_UNSPEC or IEEE80211_HW_SIGNAL_DB

max_rates

maximum number of alternate rate retry stages

max_rate_tries

maximum number of tries for each stage

DESCRIPTION

This structure contains the configuration and hardware information for an 802.11 PHY.

NOTICE

All work performed on this workqueue should NEVER acquire the RTNL lock (i.e. Don't use the function ieee80211_iterate_active_interfaces)

AUTHOR

Johannes Berg <johannes@sipsolutions.net>

Author.