net80211: adjust more VHT structures/fields

Replace ieee80211_ie_vhtcap with ieee80211_vht_cap and
ieee80211_ie_vht_operation with ieee80211_vht_operation.
The "ie" version has the two bytes type/length at the beginning which
we did not actually use as such (the one place doing did just as unused
extra work).

Using the non-"ie" versions allows us to re-use them on shared code.
Using an enum helps us to not accidentally get unsuppored or unhandled
values tough we cannot use it in the struct as we need to ensure the
field width.

ieee80211_vht_operation is guarded by _KERNEL/WANT_NET80211. While the
header is supposed to be exported to user land historically, software
such as wpa bring their own structure definitions. For in-tree usage
it is only ifconfig which really cares (at least for now).

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: adrian (earlier), cc
Differential Revision: https://reviews.freebsd.org/D42901

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

net80211: add ieee80211_add_vhtcap_ch()

Add an implementation of ieee80211_add_vhtcap() which works based on
information derived from the vap (and possibly channel/band but we do
not support that yet in net80211). This is needed for scans request
information in LinuxKPI at times before we have a BSS.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: adrian, cc
Differential Revision: https://reviews.freebsd.org/D42422

net80211: migrate ic_vhtcaps, ic_vht_mcsinfo, ic_flags_vht

Like for the VAP rename ic_flags_vht to ic_vht_flags for consistency to
keep "VHT" fields together and merge ic_vhtcaps and ic_vht_mcsinfo
into struct ieee80211_vht_cap ic_vht_cap.

While the structure layout changes no other functional changes intended.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: adrian, cc
Differential Revision: https://reviews.freebsd.org/D42421

net80211: combine iv_vhtcaps and iv_vht_mcsinfo

The iv_vhtcaps and iv_vht_mcsinfo fields together form
struct ieee80211_vht_cap so combine them into one field in the VAP
and keep the information together.

While the structure layout changes no other functional changes intended.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: adrian, cc
Differential Revision: https://reviews.freebsd.org/D42420

net80211: rename iv_flags_vht to iv_vht_flags

While the flag field is internal start naming it as well as "iv_vht*"
so we keep all "VHT" fields together. This breaks with what was done
done for HT but with HE, EHT, .. coming one day seems the more logic
choice.

No functional changes intended.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: adrian, cc
Differential Revision: https://reviews.freebsd.org/D42419

sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

net80211: VHT correct check/option in ieee80211_vht_adjust_channel()

In ieee80211_vht_adjust_channel() we have to check for all possible
IEEE80211_FVHT_VHT* options using the mask rather than just checking
for IEEE80211_FVHT_VHT; ieee80211_vhtchanflags() (contrary to its
HT counterpart) only returns the "highest" flag nor or-ing them together
with the base flag. For the moment this seems to make sense as with
more width options we'd add a pyramid.

Later on, in the same function when we get VHT160 actually go and look
for VHT160 and not VHT80.

Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D35977

net80211: update for (more) VHT160 support

Implement two macros IEEE80211_VHTCAP_SUPP_CHAN_WIDTH_IS_160MHZ()
and its 80+80 counter part to check in vhtcaps for appropriate
levels of support and use the macros throughout the code.

Add vht160_chan_ranges/is_vht160_valid_freq and handle analogue
to vht80 in various parts of the code.

Add ieee80211_add_channel_cbw() which also takes the CBW flag
fields and make the former ieee80211_add_channel() a wrapper to it.
With the CBW flags we can add HT/VHT channels passing them to
getflags() for the 2/5ghz functions.

In ifconfig(8) add the regdomain_addchans() support for VHT160
and VHT80P80.

With this (+ regdoain.xml updates) VHT160 channels can be
configured, listed, and pass regdomain where appropriate.

Tested with: iwlwifi
Reviewed by: adrian
MFC after: 10 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D26712

Provide MS() and SM() macros for 80211 and wireless drivers.

We have (two versions) of MS() and SM() macros which we use throughout
the wireless code. Change all but three places (ath_hal, rtwn, and rsu)
to the newly provided _IEEE80211_MASKSHIFT() and _IEEE80211_SHIFTMASK()
macros. Also change one internal case using both _S and _M instead of
just _S away from _M (one of the reasons rtwn and rsu were not changed).

This was done semi-mechanically. No functional changes intended.

Requested by: gnn (D26091)
Reviewed by: adrian (pre line wrap)
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC (d/b/a "Netgate")
Differential Revision: https://reviews.freebsd.org/D26539

net: clean up empty lines in .c and .h files

net80211: VHT correct NSS Set loop boundary

For the <VHT-MCS, NSS> tuple, NSS is 1..8 (or in our loop case 0..7
but not 0..6). Correct the boundry to check for < 8 and not < 7.

MFC after: 2 weeks
Reviewed by: adrian
Sponsored by: Rubicon Communications, LLC (d/b/a "Netgate")
Differential Revision: https://reviews.freebsd.org/D26087

net80211: return 80P80 before 160

In ieee80211_vht_get_chwidth_ie() we need to return 80P80 (3) before
VHT160 (2) as otherwise we'll never use 80P80. Fix the order.

MFC after: 2 weeks
X-MFC with: r364303 (which missed this)
Sponsored by: Rubicon Communications, LLC (d/b/a "Netgate")

net80211: remove vertical whitespace

No functional changes.

MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC (d/b/a "Netgate")

80211: consistently order 160 and 80+80

For flags and checks the order goes VHT160 and then VHT80P80 unless
checks are in reverse order ("more comes first") in which case we
deal with VHT80P80 first.
The one reverse order to pick out is where we check channel
prefernences. While it may seem that VHT160 is better, finding
two "free" channels (VHT 80+80) is more likely so we do prefer that.

While dealing with VHT160 and VHT80P80 add extra clauses previously
missing or marked TODO in a few places.

Reviewed by: adrian, gnn
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC (d/b/a "Netgate")
Differential Revision: https://reviews.freebsd.org/D26002

80211: consistently spell 80P80

The standard uses 80+80 and 80p80 but nowhere 80_80.
Switch the latter to 80P80 for all the macros and comments refering
to #defined flags which I could find.
The only place we leave as 80p80 is the ifconfig command line arguments
as we spell them all in lower case.
Ideally we would use 80+80 for any interactions with the user and
80P80 for anything internal but let us not confuse parsers and
hence avoid the '+' in either case.

Reviewed by: adrian, gnn
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC (d/b/a "Netgate")
Differential Revision: https://reviews.freebsd.org/D26001

net80211 / ifconfig: cleanup the use of IEEE80211_FVHT_USEVHT*

Rather then using magic numbers duplicate IEEE80211_FVHT_VHT* in
ifconfig (cleanup of these and other flags used and not exposed by
net80211 should happen later) and use those.
In the kernel this simplifies one ioctl path (the other one currently
relies on individual bit flags being passed in).
We also re-order the 80P80 and 160 flag for 160 to come before 80+80
and more clearly leave the flags as TODO in one of the 160/80+80 cases.

Reviewed by: adrian
MFC after: 2 weeks
Sponsored by: Rubicon Communications, LLC (d/b/a "Netgate")
Differential Revision: https://reviews.freebsd.org/D26000

[net80211] Commit files missing in the previous commit

These belong to my previous commit, but apparently I typed ieee80211_vhf.[ch]
and forgot ht.h. Le oops.

Fix build without IEEE80211_DEBUG.

Reported by: many

[net80211] add VHT action frame placeholders for when it's time to implement.

[net80211] create a helper function to calculate the station facing VHT capabilities.

This is needed for two reasons:

* Drivers will need to know what the negotiated set of VHT capabilities
and rates are in order to configure (and reconfigure for opmode/chanwidth
changes) how to speak to a given peer; and
* Because some vendors are "special", we should be careful in what we announce
to them during peer association.

This isn't the complete solution, as I still need to make sure that when
sending out probe requests before we know what we want, we don't limit
the capabilities being announced. This is important for IBSS/mesh work
later on as probe request/response exchanges are the first hint at what
a peer supports. I'll look at adding that to the API soon.

[net80211] use the correct freq2 field when populating VHT operation element.

Whilst here, leave a TODO comment so I revisit this routine in the context
of hostap operation probe requests for IBSS/mesh.

[net80211] Add initial VHT support routines.

This is a skeleton set based on ieee80211_ht.c. It implements some IE
parsing, some basic unfinished negotiation, and channel promotion/demotion.

However, by itself it's not enough to do VHT - notably, the actual
channel promotion for STA mode at least is done in ieee80211_ht.c as
part of htinfo_update_chw(). I was .. quite amused when I found that
out.

I'm checking this in so others can see progress rather than one huge
commit when VHT is "done" (which will likely be quite a while.)