Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Fix the order of parameters passed to the HT frame duration calculation.

Approved by: re (kib)

Modify the sample rate control algorithm to only select/sample HT
rates for HT nodes.

Disconnect sun4v architecture from the three.

Some files keep the SUN4V tags as a code reference, for the future,
if any rewamped sun4v support wants to be added again.

Reviewed by: marius
Tested by: sbruno
Approved by: re

After discussing with Bernhard, the "right" way in net80211 to check
the channel width is ni->ni_chw, which is set to the negotiated channel
width. ni->ni_htflags is the capability, rather than the negotiated
value.

Teach both the TX path and the sample rate module about this.

Fix static ucastrate for ath_rate_sample.

* Pull out the static rix stuff into a different function
* I know this may slightly drop performance, but check if a static
rix is needed before each packet TX.

* Whilst I'm at it, add a little extra debugging to the rate
control stuff to make it easier to follow what's going on.

The sample rate module currently does the slightly wrong thing when
determining whether to use MRR or not.

It uses the 11g protection mode when calculating 11n related stuff, rather
than checking the 11n protection mode.

Furthermore, the 11n chipsets can quite happily handle multi-rate retry w/
protection; the TX path and rate control modules need to be taught about
that.

Modify the sample rate module output to be (slightly) easier to understand.

* add dot11rate_label() which returns Mb or MCS based on legacy or HT
* use it everywhere dot11rate() is used
* in the "current selection" part at the top of the debugging output,
otuput what the rate itself is rather than the rix. The rate index
(rix) has very little meaning to normal humans who don't know how
to find the PHY settings for each of the chipsets; pointing out the
rix rate and type is likely more useful.

Properly propagate whether the channel is HT40 or not when calculating
packet duration for the ath_rate_sample module.

This doesn't affect the packet TX at all; only how much time the
sample rate module attributes to a completed TX.

Commit some missing bits to the sample rate module to (more) correctly calculate 802.11n packet duration.

This doesn't yet take into account HT40 packet durations as the node info
(needed to know if it's a HT20 or HT40 node) isn't available everywhere
it needs to be.

Add a new method to the rate control modules which extract out the
three other rates and try counts.

The 11n rate scenario path wants to take a list of rate and tries,
rather than calling setupxtxdesc().

(Mostly) teach ath_rate_sample about MCS rates.

This is just the bare minimum needed to teach ath_rate_sample to try
and handle MCS rates. It doesn't at all attempt to find the best
rate by any means - it doesn't know anything about the MCS rate
relations, TX aggregation or any of the much sexier 11n stuff
that's out there.

It's just enough to transmit 11n frames and handle TX completion.

It shouldn't affect legacy (11abg) behaviour.

Obtained from: rpaulo@

Migrate the sample rate module to the new ath_hal_gettxcompletionrates() API.

This removes the chipset-dependent TX DMA completion descriptor groveling.
It should now be (more) portable to other, later atheros chipsets when the
time comes.

purge HAL_TXSTAT_ALTRATE; you can figure this out by checking ts_finaltsi
and it cannot be used with MCS rate codes

add a debug msg for when a fixed transmit rate is not applied because
it's not found in the sta's negotiated rate set

correct fixed rate handling; the rixmap was changed a while back
to be indexed by the ieee rate code

remove module glue, it's not used any more

Switch to ath hal source code. Note this removes the ath_hal
module; the ath module now brings in the hal support. Kernel
config files are almost backwards compatible; supplying

device ath_hal

gives you the same chip support that the binary hal did but you
must also include

options AH_SUPPORT_AR5416

to enable the extended format descriptors used by 11n parts.
It is now possible to control the chip support included in a
build by specifying exactly which chips are to be supported
in the config file; consult ath_hal(4) for information.

cover up sun4v namespace pollution

Major overhaul:
o eliminate private state indexed by 802.11 rate codes; use the hal's
rate tables directly to get the same info
o calculate a mask of operational rates to optimize lookups and checks
(instead of using for loops and similar)
o optimize size bin operations
o ignore rates marked as "do not use" in the hal phy tables
o fix bug that caused upshifting to break in 11g once the rate dropped
below 11Mb/s
o add more intelligent multi-rate tx schedules
o add support for 1/2 and 1/4 width channels
o add dev.ath.X.sample_stats sysctl to dump runtime statistics to the console
(needs to go up to a user app)
o export more tuning knobs via sysctls (still a couple of magic constants)

o With the addition of HT rates the set of h/w codes has a much wider range
making the use of sc_hwmap to do direct mapping impractical. Switch to
indexing by the rate index instead of the rate code and adjust associated
state and logic appropriately. This has several benefits including
simplification of the led code.
o fix radiotap capture of HT rates
o fix conditional compilation of HT radiotap support to be based on the
hal having 5416 support; not the ABI version as hal builds may or may
not include 5416 support

move complaints about bad rate codes up a level so we can print
the h/w rate code and other useful info

remove driver-private equivalent of ni_txparms; it's now superfluous

now that the new association callback is used when joining a bss we can
eliminate the ath_rate_newassoc callback and associated code

Multi-bss (aka vap) support for 802.11 devices.

Note this includes changes to all drivers and moves some device firmware
loading to use firmware(9) and a separate module (e.g. ral). Also there
no longer are separate wlan_scan* modules; this functionality is now
bundled into the wlan module.

Supported by: Hobnob and Marvell
Reviewed by: many
Obtained from: Atheros (some bits)

revert 1.18: the negotiated rate set may not match the hal
rate tables, so using the hal's rateCodeToIndex array
will produce wrong indices for the negotiated rate set

MFC after: 3 days

convert hardware rate codes to IEEE rate codes with a lookup table
instead of a linear search

Reviewed by: sephe, avatar
Approved by: re (blanket wireless)
MFC after: 2 weeks

First in a series of changes to remove the now-unused Giant compatibility
framework for non-MPSAFE network protocols:

- Remove debug_mpsafenet variable, sysctl, and tunable.
- Remove NET_NEEDS_GIANT() and associate SYSINITSs used by it to force
debug.mpsafenet=0 if non-MPSAFE protocols are compiled into the kernel.
- Remove logic to automatically flag interrupt handlers as non-MPSAFE if
debug.mpsafenet is set for an INTR_TYPE_NET handler.
- Remove logic to automatically flag netisr handlers as non-MPSAFE if
debug.mpsafenet is set.
- Remove references in a few subsystems, including NFS and Cronyx drivers,
which keyed off debug_mpsafenet to determine various aspects of their own
locking behavior.
- Convert NET_LOCK_GIANT(), NET_UNLOCK_GIANT(), and NET_ASSERT_GIANT into
no-op's, as their entire behavior was determined by the value in
debug_mpsafenet.
- Alias NET_CALLOUT_MPSAFE to CALLOUT_MPSAFE.

Many remaining references to NET_.*_GIANT() and NET_CALLOUT_MPSAFE are still
present in subsystems, and will be removed in followup commits.

Reviewed by: bz, jhb
Approved by: re (kensmith)

Update 802.11 wireless support:
o major overhaul of the way channels are handled: channels are now
fully enumerated and uniquely identify the operating characteristics;
these changes are visible to user applications which require changes
o make scanning support independent of the state machine to enable
background scanning and roaming
o move scanning support into loadable modules based on the operating
mode to enable different policies and reduce the memory footprint
on systems w/ constrained resources
o add background scanning in station mode (no support for adhoc/ibss
mode yet)
o significantly speedup sta mode scanning with a variety of techniques
o add roaming support when background scanning is supported; for now
we use a simple algorithm to trigger a roam: we threshold the rssi
and tx rate, if either drops too low we try to roam to a new ap
o add tx fragmentation support
o add first cut at 802.11n support: this code works with forthcoming
drivers but is incomplete; it's included now to establish a baseline
for other drivers to be developed and for user applications
o adjust max_linkhdr et. al. to reflect 802.11 requirements; this eliminates
prepending mbufs for traffic generated locally
o add support for Atheros protocol extensions; mainly the fast frames
encapsulation (note this can be used with any card that can tx+rx
large frames correctly)
o add sta support for ap's that beacon both WPA1+2 support
o change all data types from bsd-style to posix-style
o propagate noise floor data from drivers to net80211 and on to user apps
o correct various issues in the sta mode state machine related to handling
authentication and association failures
o enable the addition of sta mode power save support for drivers that need
net80211 support (not in this commit)
o remove old WI compatibility ioctls (wicontrol is officially dead)
o change the data structures returned for get sta info and get scan
results so future additions will not break user apps
o fixed tx rate is now maintained internally as an ieee rate and not an
index into the rate set; this needs to be extended to deal with
multi-mode operation
o add extended channel specifications to radiotap to enable 11n sniffing

Drivers:
o ath: add support for bg scanning, tx fragmentation, fast frames,
dynamic turbo (lightly tested), 11n (sniffing only and needs
new hal)
o awi: compile tested only
o ndis: lightly tested
o ipw: lightly tested
o iwi: add support for bg scanning (well tested but may have some
rough edges)
o ral, ural, rum: add suppoort for bg scanning, calibrate rssi data
o wi: lightly tested

This work is based on contributions by Atheros, kmacy, sephe, thompsa,
mlaier, kevlo, and others. Much of the scanning work was supported by
Atheros. The 11n work was supported by Marvell.

update copyrights to 2007 and convert to be 2-clause bsd-only

save changes for handling 5416/5418 parts

Track v0.9.20.3 hal:

o no more ds_vdata in tx/rx descriptors
o split h/w tx/rx descriptor from s/w status
o as part of the descriptor split change the rate control module api
so the ath_buf is passed in to the module so it can fetch both
descriptor and status information as needed
o add some const poisoning

Also for sample rate control algorithm:

o split debug msgs (node, rate, any)
o uniformly bounds check rate indices (and in some cases correct checks)
o move array index ops to after bounds checking
o use final tsi from the status block instead of the h/w descriptor
o replace h/w descriptor struct's with proper mask+shift defs (this
doesn't belong here; everything is known by the driver and should
just be sent down so there's no h/w-specific knowledge)

MFC after: 1 month

add missing \n's

Submitted by: avatar@
MFC after: 1 week

correct ni_txrate when using a fixed rate; fixes current rate reporting

MFC after: 3 days

fix comment and whitespace

move mgt frame tx rate responsibility from the rate control modules
to the driver; this avoids redundant logic and will be necessary
for future additions

MFC after: 2 weeks

sync with latest code in madwifi

Obtained from: madwifi
MFC after: 2 weeks

bandaid inconsistent state handling: the rate index map may be
stale when called to reset rate control state causing us to
pickup an invalid index, check for this and skip 'em (things
will eventually get fixed up so this is not harmful)

Propagate rename of IFF_OACTIVE and IFF_RUNNING to IFF_DRV_OACTIVE and
IFF_DRV_RUNNING, as well as the move from ifnet.if_flags to
ifnet.if_drv_flags. Device drivers are now responsible for
synchronizing access to these flags, as they are in if_drv_flags. This
helps prevent races between the network stack and device driver in
maintaining the interface flags field.

Many __FreeBSD__ and __FreeBSD_version checks maintained and continued;
some less so.

Reviewed by: pjd, bz
MFC after: 7 days

diff reduction against p4: define IEEE80211_FIXED_RATE_NONE and use
it instead of -1

Stop embedding struct ifnet at the top of driver softcs. Instead the
struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
- Struct arpcom is no longer referenced in normal interface code.
Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
To enforce this ac_enaddr has been renamed to _ac_enaddr.
- The second argument to ether_ifattach is now always the mac address
from driver private storage rather than sometimes being ac_enaddr.

Reviewed by: sobomax, sam

fix size_to_bin

Obtained from: madwifi

nuke unintentional use of HAL_BOOL type

o fix bug where rate wouldn't lift off lowest setting when operating as
an ap in 11g with protection enabled
o correct rate selection when operating in 11g with protection when no
packets have been sent yet (from John Bicket)
o track api change to get first descriptor and use it to collect the frame
length for calculating the state bin
o add more debugging and shuffle some existing debugging to give more info
o bump version to distinguish bug fixes

rev rate control api to pass the both the first+last tx descriptors
to the rate control module for tx complete processing; this enables
rate control algorithms to extract the packet length for xmits that
require multiple descriptors

sync rates for any associated stations or neighbors on state transition

simplify callback

fix braino introduced when converting from madwifi

eliminate mid-block variable decls

version 1.1 (with cleanups)

Submitted by: John Bicket

Adding missing module dependency. This should fix the undefined symbol
error(ath_hal_computetxtime) during module loading.

Reviewed by: sam (mentor)

SampleRate rate control algorithm for the ath driver

Submitted by: John Bicket

statically allocate the station/neighbor node table; the deferred
allocation scheme introduced a race condition during device state
transitions

bump copyright for 2005

Like on the ath_rate_onoe component, make this compile on amd64. Convert
pointers to an integer via uintptr_t.

Fix an apparent bug that caused a compile failure.
ieee80211_iterate_nodes() takes ic->ic_sta as its first argument on the
onoe module. It had just 'ic' here in the same context, which was a
mismatched argument.

Make this amd64-clean. sizeof is long on amd64, so things that do a printf
of a sizeof, need to use %z to get the correct type on all our platforms.
Also, convert integers<->pointers via uintptr_t.

(I think Sam's instructions were for me to commit this. If I
misunderstood, then I apologize in advance.)

Transmit rate control modules for the ath driver.