Name

struct ieee80211_hw — hardware information and state

Synopsis

struct ieee80211_hw {
  struct ieee80211_conf conf;
  struct wiphy * wiphy;
  const char * rate_control_algorithm;
  void * priv;
  unsigned long flags[BITS_TO_LONGS(NUM_IEEE80211_HW_FLAGS)];
  unsigned int extra_tx_headroom;
  unsigned int extra_beacon_tailroom;
  int vif_data_size;
  int sta_data_size;
  int chanctx_data_size;
  int txq_data_size;
  u16 queues;
  u16 max_listen_interval;
  s8 max_signal;
  u8 max_rates;
  u8 max_report_rates;
  u8 max_rate_tries;
  u8 max_rx_aggregation_subframes;
  u8 max_tx_aggregation_subframes;
  u8 max_tx_fragments;
  u8 offchannel_tx_hw_queue;
  u8 radiotap_mcs_details;
  u16 radiotap_vht_details;
  netdev_features_t netdev_features;
  u8 uapsd_queues;
  u8 uapsd_max_sp_len;
  u8 n_cipher_schemes;
  const struct ieee80211_cipher_scheme * cipher_schemes;
};  

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.

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[BITS_TO_LONGS(NUM_IEEE80211_HW_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.)

extra_beacon_tailroom

tailroom to reserve in each beacon tx skb. Can be used by drivers to add extra IEs.

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.

chanctx_data_size

size (in bytes) of the drv_priv data area within struct ieee80211_chanctx_conf.

txq_data_size

size (in bytes) of the drv_priv data area within struct ieee80211_txq.

queues

number of available hardware transmit queues for data packets. WMM/QoS requires at least four, these queues need to have configurable access parameters.

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 the hw can handle.

max_report_rates

maximum number of alternate rate retry stages the hw can report back.

max_rate_tries

maximum number of tries for each stage

max_rx_aggregation_subframes

maximum buffer size (number of sub-frames) to be used for A-MPDU block ack receiver aggregation. This is only relevant if the device has restrictions on the number of subframes, if it relies on mac80211 to do reordering it shouldn't be set.

max_tx_aggregation_subframes

maximum number of subframes in an aggregate an HT driver will transmit. Though ADDBA will advertise a constant value of 64 as some older APs can crash if the window size is smaller (an example is LinkSys WRT120N with FW v1.0.07 build 002 Jun 18 2012).

max_tx_fragments

maximum number of tx buffers per (A)-MSDU, sum of 1 + skb_shinfo(skb)->nr_frags for each skb in the frag_list.

offchannel_tx_hw_queue

HW queue ID to use for offchannel TX (if IEEE80211_HW_QUEUE_CONTROL is set)

radiotap_mcs_details

lists which MCS information can the HW reports, by default it is set to _MCS, _GI and _BW but doesn't include _FMT. Use IEEE80211_RADIOTAP_MCS_HAVE_* values, only adding _BW is supported today.

radiotap_vht_details

lists which VHT MCS information the HW reports, the default is _GI | _BANDWIDTH. Use the IEEE80211_RADIOTAP_VHT_KNOWN_* values.

netdev_features

netdev features to be set in each netdev created from this HW. Note that not all features are usable with mac80211, other features will be rejected during HW registration.

uapsd_queues

This bitmap is included in (re)association frame to indicate for each access category if it is uAPSD trigger-enabled and delivery- enabled. Use IEEE80211_WMM_IE_STA_QOSINFO_AC_* to set this bitmap. Each bit corresponds to different AC. Value '1' in specific bit means that corresponding AC is both trigger- and delivery-enabled. '0' means neither enabled.

uapsd_max_sp_len

maximum number of total buffered frames the WMM AP may deliver to a WMM STA during any Service Period triggered by the WMM STA. Use IEEE80211_WMM_IE_STA_QOSINFO_SP_* for correct values.

n_cipher_schemes

a size of an array of cipher schemes definitions.

cipher_schemes

a pointer to an array of cipher scheme definitions supported by HW.

Description

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