wlan - Sync netproto/802_11 from FreeBSD part 1/N

* Sync netproto/802_11 from FreeBSD, fbsd git dd885b9a0a0e, May 11 2016.

80211 - Update up to FreeBSD's r287029 (only skipping a few minor changes)

Taken-From: FreeBSD

wlan - Cleanup compat shims for FreeBSD version that predate 10.0-RELEASE.

Taken-From: FreeBSD (SVN r283541)

kernel: Move us to using M_NOWAIT and M_WAITOK for mbuf functions.

The main reason is that our having to use the MB_WAIT and MB_DONTWAIT
flags was a recurring issue when porting drivers from FreeBSD

kernel: Move us to using M_NOWAIT and M_WAITOK for mbuf functions.

The main reason is that our having to use the MB_WAIT and MB_DONTWAIT
flags was a recurring issue when porting drivers from FreeBSD because
it tended to get forgotten and the code would compile anyway with the
wrong constants. And since MB_WAIT and MB_DONTWAIT ended up as ocflags
for an objcache_get() or objcache_reclaimlist call (which use M_WAITOK
and M_NOWAIT), it was just one big converting back and forth with some
sanitization in between.

This commit allows M_* again for the mbuf functions and keeps the
sanitizing as it was before: when M_WAITOK is among the passed flags,
objcache functions will be called with M_WAITOK and when it is absent,
they will be called with M_NOWAIT. All other flags are scrubbed by the
MB_OCFLAG() macro which does the same as the former MBTOM().

Approved-by: dillon

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kernel/wlan: Re-fix printf issues in debug messages.

wlan - Update wlan from Adrian / FreeBSD

* Update the wlan infrastructure, initially working with ath.

kernel: make pktinfo and cpuid native to ip_input()

In order to remove ether_input_pkt(), switch the prototype
of if_input() and adjust all callers. While there, consolidate
the style of the invoke

kernel: make pktinfo and cpuid native to ip_input()

In order to remove ether_input_pkt(), switch the prototype
of if_input() and adjust all callers. While there, consolidate
the style of the invoke.

Suggested and reviewed by: sephe

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if: Per-cpu ifnet/ifaddr statistics, step 1/3

Wrap ifnet/ifaddr stats updating, setting and extraction into macros;
ease upcoming changes.

wlan: Partly fix set-but-unused gcc47 warning

kernel: Fix the build of the SOEKRIS kernel config.

It's the only one that has if_ath and 80211 in the kernel and ATH_DEBUG
and IEEE80211_DEBUG isn't set at the same time. So it caught a few
ethstr[

kernel: Fix the build of the SOEKRIS kernel config.

It's the only one that has if_ath and 80211 in the kernel and ATH_DEBUG
and IEEE80211_DEBUG isn't set at the same time. So it caught a few
ethstr[] that were not yet under the proper #ifdef.

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kern - Utilize new way of printing MAC addresses.

kether_aton() function is being used to return a buffer
with the human readable notation of an ethernet address.

if: Multiple TX queue support step 1 of many; introduce ifaltq subqueue

Put the plain queue information, e.g. queue header and tail, serializer,
packet staging scoreboard and ifnet.if_start schedule

if: Multiple TX queue support step 1 of many; introduce ifaltq subqueue

Put the plain queue information, e.g. queue header and tail, serializer,
packet staging scoreboard and ifnet.if_start schedule netmsg etc. into
its own structure (subqueue). ifaltq structure could have multiple of
subqueues based on the count that drivers can specify.

Subqueue's enqueue, dequeue, purging and states updating are protected
by the subqueue's serializer, so for hardwares supporting multiple TX
queues, contention on queuing operation could be greatly reduced.

The subqueue is passed to if_start to let the driver know which hardware
TX queue to work on. Only the related driver's TX queue serializer will
be held, so for hardwares supporting multiple TX queues, contention on
driver's TX queue serializer could be greatly reduced.

Bunch of ifsq_ prefixed functions are added, which is used to perform
various operations on subqueues. Commonly used ifq_ prefixed functions
are still kept mainly for the drivers which do not support multiple TX
queues (well, these functions also ease the netif/ convertion in this
step :).

All of the pseudo network devices under sys/net are converted to use the
new subqueue operation. netproto/802_11 is converted too. igb(4) is
converted to use the new subqueue operation, the rest of the network
drivers are only changed for the if_start interface modification.

For ALTQs which have packet scheduler enabled, only the first subqueue
is used (*).

(*) Whether we should utilize multiple TX queues if ALTQ's packet scheduler
is enabled is quite questionable. Mainly because hardware's multiple TX
queue packet dequeue mechanism could have negative impact on ALTQ's packet
scheduler's decision.

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kernel/802_11: Remove unused variables.

net: Don't use IF_{EN,DE}QUEUE on ifnet.if_snd

Remove empty DragonFly CVS IDs.

kernel: Fix numerous errors in printf() like formats and arguments.

wlan - Rip out all wlan locks part 1/2

* Rip out all the individiual wlan locks

Fix mbuf flags usage.

Submitted by: dillon

Fix remaining M_NOWAIT and use ieee80211_handoff instead of if_transmit.

Sixth pass: remove all references to ether_sprintf().

Second pass at converting the net80211 to DragonFly.

First pass at converting the net80211 infrastrcture from FreeBSD.