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tx descriptor array
o while here fix a whitespace nit
Obtained from: NetBSD
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o destroy mutex's on detach (was missing)
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seeded with arc4random rather than calling arc4random for each
packet. Note this is the same algorithm used to select the IV when
doing WEP on the host.
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for WEP in case the prepend addes a new mbuf. This fixes WEP.
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o don't grab the mutex at the top of ath_detach; it does nothing
useful
o deal with entry to ath_ioctl during detach to disable promiscuous
mode as a result of calling bpfdetach2: cannot call ath_init when
the device is marked invalid as the code isn't prepared to deal
with it (in particular by that time the hal reference may have
been yanked)
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change ath_rate_ctl_reset to handle transition from station
mode to adhoc mode; was not resetting the initial xmit rate
causing outbound frames to be dicarded
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calculate smoothed signal quality data for each node.
o add a 16-deep history buffer to each driver-private node storage that
holds rssi and antenna info for received frames
o override the default per-node "get rssi" method to return an average
rssi value based on samples collected over the last second
o enable beacon reception so even idle systems maintain a running history
of signal quality
This data may also be useful for improving the rate control algorithm.
Based on work by Tom Marshall <tommy@home.tig-grr.com> for MADWIFI.
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to the 802.11 layer if they are at least IEEE80211_MIN_LEN
o mask off interrupt status bits that we don't care about so we don't do
the wrong thing; this fixes a problem where the beacon miss interrupt status
bit is delivered together with other status bits when operating in monitor
mode (we would post a beacon miss swi and then do the wrong thing)
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the beacon frames
Reminded by: Stephane Laroche <stephane.laroche@colubris.com>
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safe since the 802.11 layer does the right thing for 11a operation)
o select short preamble operation based on the negotiated capabilities; not
just the local state/capability
o fillin the duration field in the 802.11 header as appropriate
o remove detection of 11g support; no longer needed
Obtained from: MADWIFI (with modifications)
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we no longer need the debugging code to dump packets.
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this is needed for the 5212 which a separate filter bit for these frames.
Submitted by: Stephane Laroche <stephane.laroche@colubris.com>
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count handling of station entries in hostap mode:
Input path:
o driver is now expected to find the node associated with the
sender of a received frame; use ic_bss if none is located
o driver passes the (referenced) node into ieee80211_input for
use within the wlan module and is responsible for cleaning up
on return
o the antenna state is no longer passed up with each frame; this
is now considered driver-private state and drivers are responsible
for keeping it in the driver-private part of a node
Output path:
Revamp output path for management frames to eliminate redundant
locking that causes problems and to correct reference counting
bogosity that occurs when stations are timed out due to inactivity
(in AP mode). On output the refcnt'd node is stashed in the pkthdr's
recvif field (yech) and retrieved by the driver. This eliminates
an unref/ref scenario and related node table unlock/lock due to the
driver looking up the node. This is particularly important when
stations are timed out as this causes a lock order reversal that
can result in a deadlock. As a byproduct we also reduce the overhead
for sending management frames (minimal). Additional fallout from
this is a change to ieee80211_encap to return a refcn't node for
tieing to the outbound frame. Node refcnts are not reclaimed until
after a frame is completely processed (e.g. in the tx interrupt
handler). This is especially important for timed out stations as
this deref will be the final one causing the node entry to be
reclaimed.
Additional semi-related changes:
o replace m_copym use with m_copypacket (optimization)
o add assert to verify ic_bss is never free'd during normal operation
o add comments explaining calling conventions by drivers for frames
going in each direction
o remove extraneous code that "cannot be executed" (e.g. because
pointers may never be null)
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quietly discard them; this just permits them to be collected with bpf)
o add a counter for the number of rate control frames discarded when not in
monitor mode
o move the rx "too short" statistic in the stat structure so non-error rx stats
are together (NB: ABI change to apps that collect stats via driver ioctl)
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mistakes (this mistake was not an issue because the length is only used to
decide whether or not to allocate a cluster)
o while here, move a beacon length comment to the "right place"
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calculating the rate for each rx'd frame
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the HAL is setup: use sc_invalid to discard such entries into
ath_intr. This can easily happen if the device is assigned a shared IRQ.
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o add monitor mode support
o fix short preamble handling in beacon setup (noop)
o correct resume handling
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o override new_state method per new model
o use ieee80211_state_name instead of private copy
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outdoor use controls
o use sysctl-visible values in setting up channel list
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Supported by: Atheros Comunications
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