STRUCT IEEE80211_OPS(9) The basic mac80211 driver inte STRUCT IEEE80211_OPS(9)NAMEstruct_ieee80211_ops - callbacks from mac80211 to the driver
SYNOPSIS
struct ieee80211_ops {
void (* tx) (struct ieee80211_hw *hw,struct ieee80211_tx_control *control,struct sk_buff *skb);
int (* start) (struct ieee80211_hw *hw);
void (* stop) (struct ieee80211_hw *hw);
#ifdef CONFIG_PM
int (* suspend) (struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan);
int (* resume) (struct ieee80211_hw *hw);
void (* set_wakeup) (struct ieee80211_hw *hw, bool enabled);
#endif
int (* add_interface) (struct ieee80211_hw *hw,struct ieee80211_vif *vif);
int (* change_interface) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,enum nl80211_iftype new_type, bool p2p);
void (* remove_interface) (struct ieee80211_hw *hw,struct ieee80211_vif *vif);
int (* config) (struct ieee80211_hw *hw, u32 changed);
void (* bss_info_changed) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_bss_conf *info,u32 changed);
int (* start_ap) (struct ieee80211_hw *hw, struct ieee80211_vif *vif);
void (* stop_ap) (struct ieee80211_hw *hw, struct ieee80211_vif *vif);
u64 (*)(struct ieee80211_hw *hw,,if 0 prepare_multicast;
#else
#endif
void (* configure_filter) (struct ieee80211_hw *hw,unsigned int changed_flags,unsigned int *total_flags,u64 multicast);
void (*)(struct ieee80211_hw *hw,struct ieee80211_vif *vif, bool allmulti,,if 0 set_multicast_list;
#else
#endif
int (* set_tim) (struct ieee80211_hw *hw, struct ieee80211_sta *sta,bool set);
int (* set_key) (struct ieee80211_hw *hw, enum set_key_cmd cmd,struct ieee80211_vif *vif, struct ieee80211_sta *sta,struct ieee80211_key_conf *key);
void (* update_tkip_key) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_key_conf *conf,struct ieee80211_sta *sta,u32 iv32, u16 *phase1key);
void (* set_rekey_data) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct cfg80211_gtk_rekey_data *data);
void (* set_default_unicast_key) (struct ieee80211_hw *hw,struct ieee80211_vif *vif, int idx);
int (* hw_scan) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,struct cfg80211_scan_request *req);
void (* cancel_hw_scan) (struct ieee80211_hw *hw,struct ieee80211_vif *vif);
int (* sched_scan_start) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct cfg80211_sched_scan_request *req,struct ieee80211_sched_scan_ies *ies);
void (* sched_scan_stop) (struct ieee80211_hw *hw,struct ieee80211_vif *vif);
void (* sw_scan_start) (struct ieee80211_hw *hw);
void (* sw_scan_complete) (struct ieee80211_hw *hw);
int (* get_stats) (struct ieee80211_hw *hw,struct ieee80211_low_level_stats *stats);
void (* get_tkip_seq) (struct ieee80211_hw *hw, u8 hw_key_idx,u32 *iv32, u16 *iv16);
int (* set_frag_threshold) (struct ieee80211_hw *hw, u32 value);
int (* set_rts_threshold) (struct ieee80211_hw *hw, u32 value);
int (* sta_add) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,struct ieee80211_sta *sta);
int (* sta_remove) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,struct ieee80211_sta *sta);
#ifdef CONFIG_MAC80211_DEBUGFS
void (* sta_add_debugfs) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_sta *sta,struct dentry *dir);
void (* sta_remove_debugfs) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_sta *sta,struct dentry *dir);
#endif
void (* sta_notify) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,enum sta_notify_cmd, struct ieee80211_sta *sta);
int (* sta_state) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,struct ieee80211_sta *sta,enum ieee80211_sta_state old_state,enum ieee80211_sta_state new_state);
void (* sta_rc_update) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_sta *sta,u32 changed);
int (* conf_tx) (struct ieee80211_hw *hw,struct ieee80211_vif *vif, u16 ac,const struct ieee80211_tx_queue_params *params);
u64 (* get_tsf) (struct ieee80211_hw *hw, struct ieee80211_vif *vif);
void (* set_tsf) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,u64 tsf);
void (* reset_tsf) (struct ieee80211_hw *hw, struct ieee80211_vif *vif);
int (* tx_last_beacon) (struct ieee80211_hw *hw);
int (* ampdu_action) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,enum ieee80211_ampdu_mlme_action action,struct ieee80211_sta *sta, u16 tid, u16 *ssn,u8 buf_size);
int (* get_survey) (struct ieee80211_hw *hw, int idx,struct survey_info *survey);
void (* rfkill_poll) (struct ieee80211_hw *hw);
void (* set_coverage_class) (struct ieee80211_hw *hw, u8 coverage_class);
#ifdef CONFIG_NL80211_TESTMODE
int (* testmode_cmd) (struct ieee80211_hw *hw, void *data, int len);
int (* testmode_dump) (struct ieee80211_hw *hw, struct sk_buff *skb,struct netlink_callback *cb,void *data, int len);
#endif
void (* flush) (struct ieee80211_hw *hw, u32 queues, bool drop);
void (* channel_switch) (struct ieee80211_hw *hw,struct ieee80211_channel_switch *ch_switch);
int (* napi_poll) (struct ieee80211_hw *hw, int budget);
int (* set_antenna) (struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
int (* get_antenna) (struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
int (* remain_on_channel) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_channel *chan,int duration,enum ieee80211_roc_type type);
int (* cancel_remain_on_channel) (struct ieee80211_hw *hw);
int (* set_ringparam) (struct ieee80211_hw *hw, u32 tx, u32 rx);
void (* get_ringparam) (struct ieee80211_hw *hw,u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
bool (* tx_frames_pending) (struct ieee80211_hw *hw);
int (* set_bitrate_mask) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,const struct cfg80211_bitrate_mask *mask);
void (* rssi_callback) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,enum ieee80211_rssi_event rssi_event);
void (* allow_buffered_frames) (struct ieee80211_hw *hw,struct ieee80211_sta *sta,u16 tids, int num_frames,enum ieee80211_frame_release_type reason,bool more_data);
void (* release_buffered_frames) (struct ieee80211_hw *hw,struct ieee80211_sta *sta,u16 tids, int num_frames,enum ieee80211_frame_release_type reason,bool more_data);
int (* get_et_sset_count) (struct ieee80211_hw *hw,struct ieee80211_vif *vif, int sset);
void (* get_et_stats) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ethtool_stats *stats, u64 *data);
void (* get_et_strings) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,u32 sset, u8 *data);
int (* get_rssi) (struct ieee80211_hw *hw, struct ieee80211_vif *vif,struct ieee80211_sta *sta, s8 *rssi_dbm);
void (* mgd_prepare_tx) (struct ieee80211_hw *hw,struct ieee80211_vif *vif);
int (* add_chanctx) (struct ieee80211_hw *hw,struct ieee80211_chanctx_conf *ctx);
void (* remove_chanctx) (struct ieee80211_hw *hw,struct ieee80211_chanctx_conf *ctx);
void (* change_chanctx) (struct ieee80211_hw *hw,struct ieee80211_chanctx_conf *ctx,u32 changed);
int (* assign_vif_chanctx) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_chanctx_conf *ctx);
void (* unassign_vif_chanctx) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct ieee80211_chanctx_conf *ctx);
void (* restart_complete) (struct ieee80211_hw *hw);
#if IS_ENABLED(CONFIG_IPV6)
void (* ipv6_addr_change) (struct ieee80211_hw *hw,struct ieee80211_vif *vif,struct inet6_dev *idev);
#endif
};
MEMBERS
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. Must be 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 and can sleep.
stop
Called after last netdevice attached to the hardware is disabled.
This should turn off the hardware (at least it must turn off frame
reception.) May be called right after add_interface if that rejects
an interface. If you added any work onto the mac80211 workqueue you
should ensure to cancel it on this callback. Must be implemented
and can sleep.
suspend
Suspend the device; mac80211 itself will quiesce before and stop
transmitting and doing any other configuration, and then ask the
device to suspend. This is only invoked when WoWLAN is configured,
otherwise the device is deconfigured completely and reconfigured at
resume time. The driver may also impose special conditions under
which it wants to use the “normal” suspend (deconfigure), say if it
only supports WoWLAN when the device is associated. In this case,
it must return 1 from this function.
resume
If WoWLAN was configured, this indicates that mac80211 is now
resuming its operation, after this the device must be fully
functional again. If this returns an error, the only way out is to
also unregister the device. If it returns 1, then mac80211 will
also go through the regular complete restart on resume.
set_wakeup
Enable or disable wakeup when WoWLAN configuration is modified. The
reason is that device_set_wakeup_enable is supposed to be called
when the configuration changes, not only in suspend.
add_interface
Called when a netdevice attached to the hardware is enabled.
Because it is not called for monitor mode devices, start and stop
must be implemented. The driver should perform any initialization
it needs before the device can be enabled. The initial
configuration for the interface is given in the conf parameter. The
callback may refuse to add an interface by returning a negative
error code (which will be seen in userspace.) Must be implemented
and can sleep.
change_interface
Called when a netdevice changes type. This callback is optional,
but only if it is supported can interface types be switched while
the interface is UP. The callback may sleep. Note that while an
interface is being switched, it will not be found by the interface
iteration callbacks.
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. It can sleep.
config
Handler for configuration requests. IEEE 802.11 code calls this
function to change hardware configuration, e.g., channel. This
function should never fail but returns a negative error code if it
does. The callback can sleep.
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. The callback can sleep.
start_ap
Start operation on the AP interface, this is called after all the
information in bss_conf is set and beacon can be retrieved. A
channel context is bound before this is called. Note that if the
driver uses software scan or ROC, this (and stop_ap) isn´t called
when the AP is just “paused” for scanning/ROC, which is indicated
by the beacon being disabled/enabled via bss_info_changed.
stop_ap
Stop operation on the AP interface.
prepare_multicast
Prepare for multicast filter configuration. This callback is
optional, and its return value is passed to configure_filter. This
callback must be atomic.
configure_filter
Configure the device´s RX filter. See the section “Frame filtering”
for more information. This callback must be implemented and can
sleep.
set_multicast_list
Configure the device´s interface specific RX multicast filter. This
callback is optional. This callback must be 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 is
only called between add_interface and remove_interface calls, i.e.
while the given virtual interface is enabled. Returns a negative
error code if the key can´t be added. The callback can sleep.
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. The callback must be atomic.
set_rekey_data
If the device supports GTK rekeying, for example while the host is
suspended, it can assign this callback to retrieve the data
necessary to do GTK rekeying, this is the KEK, KCK and replay
counter. After rekeying was done it should (for example during
resume) notify userspace of the new replay counter using
ieee80211_gtk_rekey_notify.
set_default_unicast_key
Set the default (unicast) key index, useful for WEP when the device
sends data packets autonomously, e.g. for ARP offloading. The index
can be 0-3, or -1 for unsetting it.
hw_scan
Ask the hardware to service the scan request, no need to start the
scan state machine in stack. The scan must honour the channel
configuration done by the regulatory agent in the wiphy´s
registered bands. The hardware (or the driver) needs to make sure
that power save is disabled. The req ie/ie_len members are
rewritten by mac80211 to contain the entire IEs after the SSID, so
that drivers need not look at these at all but just send them after
the SSID -- mac80211 includes the (extended) supported rates and HT
information (where applicable). When the scan finishes,
ieee80211_scan_completed must be called; note that it also must be
called when the scan cannot finish due to any error unless this
callback returned a negative error code. The callback can sleep.
cancel_hw_scan
Ask the low-level tp cancel the active hw scan. The driver should
ask the hardware to cancel the scan (if possible), but the scan
will be completed only after the driver will call
ieee80211_scan_completed. This callback is needed for wowlan, to
prevent enqueueing a new scan_work after the low-level driver was
already suspended. The callback can sleep.
sched_scan_start
Ask the hardware to start scanning repeatedly at specific
intervals. The driver must call the ieee80211_sched_scan_results
function whenever it finds results. This process will continue
until sched_scan_stop is called.
sched_scan_stop
Tell the hardware to stop an ongoing scheduled scan.
sw_scan_start
Notifier function that is called just before a software scan is
started. Can be NULL, if the driver doesn´t need this notification.
The callback can sleep.
sw_scan_complete
Notifier function that is called just after a software scan
finished. Can be NULL, if the driver doesn´t need this
notification. The callback can sleep.
get_stats
Return low-level statistics. Returns zero if statistics are
available. The callback can sleep.
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. The callback must be atomic.
set_frag_threshold
Configuration of fragmentation threshold. Assign this if the device
does fragmentation by itself; if this callback is implemented then
the stack will not do fragmentation. The callback can sleep.
set_rts_threshold
Configuration of RTS threshold (if device needs it) The callback
can sleep.
sta_add
Notifies low level driver about addition of an associated station,
AP, IBSS/WDS/mesh peer etc. This callback can sleep.
sta_remove
Notifies low level driver about removal of an associated station,
AP, IBSS/WDS/mesh peer etc. This callback can sleep.
sta_add_debugfs
Drivers can use this callback to add debugfs files when a station
is added to mac80211´s station list. This callback and
sta_remove_debugfs should be within a CONFIG_MAC80211_DEBUGFS
conditional. This callback can sleep.
sta_remove_debugfs
Remove the debugfs files which were added using sta_add_debugfs.
This callback can sleep.
sta_notify
Notifies low level driver about power state transition of an
associated station, AP, IBSS/WDS/mesh peer etc. For a VIF operating
in AP mode, this callback will not be called when the flag
IEEE80211_HW_AP_LINK_PS is set. Must be atomic.
sta_state
Notifies low level driver about state transition of a station
(which can be the AP, a client, IBSS/WDS/mesh peer etc.) This
callback is mutually exclusive with sta_add/sta_remove. It must not
fail for down transitions but may fail for transitions up the list
of states. The callback can sleep.
sta_rc_update
Notifies the driver of changes to the bitrates that can be used to
transmit to the station. The changes are advertised with bits from
enum ieee80211_rate_control_changed and the values are reflected in
the station data. This callback should only be used when the driver
uses hardware rate control (IEEE80211_HW_HAS_RATE_CONTROL) since
otherwise the rate control algorithm is notified directly. Must be
atomic.
conf_tx
Configure TX queue parameters (EDCF (aifs, cw_min, cw_max),
bursting) for a hardware TX queue. Returns a negative error code on
failure. The callback can sleep.
get_tsf
Get the current TSF timer value from firmware/hardware. Currently,
this is only used for IBSS mode BSSID merging and debugging. Is not
a required function. The callback can sleep.
set_tsf
Set the TSF timer to the specified value in the firmware/hardware.
Currently, this is only used for IBSS mode debugging. Is not a
required function. The callback can sleep.
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. The callback can sleep.
tx_last_beacon
Determine whether the last IBSS beacon was sent by us. This is
needed only for IBSS mode and the result of this function is used
to determine whether to reply to Probe Requests. Returns non-zero
if this device sent the last beacon. The callback can sleep.
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. The buf_size parameter is only valid when the
action is set to IEEE80211_AMPDU_TX_OPERATIONAL and indicates the
peer´s reorder buffer size (number of subframes) for this session
-- the driver may neither send aggregates containing more subframes
than this nor send aggregates in a way that lost frames would
exceed the buffer size. If just limiting the aggregate size, this
would be
get_survey
Return per-channel survey information
rfkill_poll
Poll rfkill hardware state. If you need this, you also need to set
wiphy->rfkill_poll to true before registration, and need to call
wiphy_rfkill_set_hw_state in the callback. The callback can sleep.
set_coverage_class
Set slot time for given coverage class as specified in IEEE
802.11-2007 section 17.3.8.6 and modify ACK timeout accordingly.
This callback is not required and may sleep.
testmode_cmd
Implement a cfg80211 test mode command. The callback can sleep.
testmode_dump
Implement a cfg80211 test mode dump. The callback can sleep.
flush
Flush all pending frames from the hardware queue, making sure that
the hardware queues are empty. The queues parameter is a bitmap of
queues to flush, which is useful if different virtual interfaces
use different hardware queues; it may also indicate all queues. If
the parameter drop is set to true, pending frames may be dropped.
The callback can sleep.
channel_switch
Drivers that need (or want) to offload the channel switch operation
for CSAs received from the AP may implement this callback. They
must then call ieee80211_chswitch_done to indicate completion of
the channel switch.
napi_poll
Poll Rx queue for incoming data frames.
set_antenna
Set antenna configuration (tx_ant, rx_ant) on the device.
Parameters are bitmaps of allowed antennas to use for TX/RX.
Drivers may reject TX/RX mask combinations they cannot support by
returning -EINVAL (also see nl80211.h
NL80211_ATTR_WIPHY_ANTENNA_TX).
get_antenna
Get current antenna configuration from device (tx_ant, rx_ant).
remain_on_channel
Starts an off-channel period on the given channel, must call back
to ieee80211_ready_on_channel when on that channel. Note that
normal channel traffic is not stopped as this is intended for hw
offload. Frames to transmit on the off-channel channel are
transmitted normally except for the IEEE80211_TX_CTL_TX_OFFCHAN
flag. When the duration (which will always be non-zero) expires,
the driver must call ieee80211_remain_on_channel_expired. Note that
this callback may be called while the device is in IDLE and must be
accepted in this case. This callback may sleep.
cancel_remain_on_channel
Requests that an ongoing off-channel period is aborted before it
expires. This callback may sleep.
set_ringparam
Set tx and rx ring sizes.
get_ringparam
Get tx and rx ring current and maximum sizes.
tx_frames_pending
Check if there is any pending frame in the hardware queues before
entering power save.
set_bitrate_mask
Set a mask of rates to be used for rate control selection when
transmitting a frame. Currently only legacy rates are handled. The
callback can sleep.
rssi_callback
Notify driver when the average RSSI goes above/below thresholds
that were registered previously. The callback can sleep.
allow_buffered_frames
Prepare device to allow the given number of frames to go out to the
given station. The frames will be sent by mac80211 via the usual TX
path after this call. The TX information for frames released will
also have the IEEE80211_TX_CTL_NO_PS_BUFFER flag set and the last
one will also have IEEE80211_TX_STATUS_EOSP set. In case frames
from multiple TIDs are released and the driver might reorder them
between the TIDs, it must set the IEEE80211_TX_STATUS_EOSP flag on
the last frame and clear it on all others and also handle the EOSP
bit in the QoS header correctly. Alternatively, it can also call
the ieee80211_sta_eosp function. The tids parameter is a bitmap and
tells the driver which TIDs the frames will be on; it will at most
have two bits set. This callback must be atomic.
release_buffered_frames
Release buffered frames according to the given parameters. In the
case where the driver buffers some frames for sleeping stations
mac80211 will use this callback to tell the driver to release some
frames, either for PS-poll or uAPSD. Note that if the more_data
paramter is false the driver must check if there are more frames on
the given TIDs, and if there are more than the frames being
released then it must still set the more-data bit in the frame. If
the more_data parameter is true, then of course the more-data bit
must always be set. The tids parameter tells the driver which TIDs
to release frames from, for PS-poll it will always have only a
single bit set. In the case this is used for a PS-poll initiated
release, the num_frames parameter will always be 1 so code can be
shared. In this case the driver must also set
IEEE80211_TX_STATUS_EOSP flag on the TX status (and must report TX
status) so that the PS-poll period is properly ended. This is used
to avoid sending multiple responses for a retried PS-poll frame. In
the case this is used for uAPSD, the num_frames parameter may be
bigger than one, but the driver may send fewer frames (it must send
at least one, however). In this case it is also responsible for
setting the EOSP flag in the QoS header of the frames. Also, when
the service period ends, the driver must set
IEEE80211_TX_STATUS_EOSP on the last frame in the SP.
Alternatively, it may call the function ieee80211_sta_eosp to
inform mac80211 of the end of the SP. This callback must be atomic.
get_et_sset_count
Ethtool API to get string-set count.
get_et_stats
Ethtool API to get a set of u64 stats.
get_et_strings
Ethtool API to get a set of strings to describe stats and perhaps
other supported types of ethtool data-sets.
get_rssi
Get current signal strength in dBm, the function is optional and
can sleep.
mgd_prepare_tx
Prepare for transmitting a management frame for association before
associated. In multi-channel scenarios, a virtual interface is
bound to a channel before it is associated, but as it isn´t
associated yet it need not necessarily be given airtime, in
particular since any transmission to a P2P GO needs to be
synchronized against the GO´s powersave state. mac80211 will call
this function before transmitting a management frame prior to
having successfully associated to allow the driver to give it
channel time for the transmission, to get a response and to be able
to synchronize with the GO. The callback will be called before each
transmission and upon return mac80211 will transmit the frame right
away. The callback is optional and can (should!) sleep.
add_chanctx
Notifies device driver about new channel context creation.
remove_chanctx
Notifies device driver about channel context destruction.
change_chanctx
Notifies device driver about channel context changes that may
happen when combining different virtual interfaces on the same
channel context with different settings
assign_vif_chanctx
Notifies device driver about channel context being bound to vif.
Possible use is for hw queue remapping.
unassign_vif_chanctx
Notifies device driver about channel context being unbound from
vif.
restart_complete
Called after a call to ieee80211_restart_hw, when the
reconfiguration has completed. This can help the driver implement
the reconfiguration step. Also called when reconfiguring because
the driver´s resume function returned 1, as this is just like an
“inline” hardware restart. This callback may sleep.
ipv6_addr_change
IPv6 address assignment on the given interface changed. Currently,
this is only called for managed or P2P client interfaces. This
callback is optional; it must not sleep.
DESCRIPTION
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.
POSSIBLE WITH A BUF_SIZE OF 8
- TX: 1.....7 - RX: 2....7 (lost frame #1) - TX: 8..1... which is
invalid since #1 was now re-transmitted well past the buffer size of 8.
Correct ways to retransmit #1 would be: - TX: 1 or 18 or 81 Even “189”
would be wrong since 1 could be lost again.
Returns a negative error code on failure. The callback can sleep.
AUTHOR
Johannes Berg <johannes@sipsolutions.net>
Author.
COPYRIGHTKernel Hackers Manual 2.6. November 2013 STRUCT IEEE80211_OPS(9)
