rtwn: explicitly configure RTS based on basic rates

The NIC/firmware initialises the initial RTS/CTS rate to something
high, like OFDM48. That's not going to be very reliable.

It's not a problem r

rtwn: explicitly configure RTS based on basic rates

The NIC/firmware initialises the initial RTS/CTS rate to something
high, like OFDM48. That's not going to be very reliable.

It's not a problem right now as we program in the RTS/CTS value
to use in the TX descriptor setup path based on the control rate
for the given frame TX rate, and like the INIDATA/driver rate
stuff in the TX descriptor, the TX descriptor RTS/CTS rate overrides
the INIRTS rate.

However when it's time to flip on firmware based rate control,
the initial rate needs to not be OFDM48. Yes, the firmware and
hardware does have some rate retry schedule for RTS/CTS frames,
but there's no point in wasting short retries trying to do OFDM48
based RTS/CTS setup.

Add some warning logging if there are no basic or RTS/CTS rates
available, and leave things at default. If this happens in
production for someone then it would be good to know and what
the rate mask was.

Locally tested:

* RTL8192CU, STA mode (with/without firmware rate control enabled locally)

Differential Revision: https://reviews.freebsd.org/D48140

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rtwn: update rtwn_get_rates() to separate out the CCK/OFDM and HT rates

The 32 bit bitmap is enough for CCK/OFDM rates and MCS0..15, but
won't work for > MCS15, nor VHT rates.

So, break out the leg

rtwn: update rtwn_get_rates() to separate out the CCK/OFDM and HT rates

The 32 bit bitmap is enough for CCK/OFDM rates and MCS0..15, but
won't work for > MCS15, nor VHT rates.

So, break out the legacy rates and HT rates.

* break the rates and htrates out
* document which calls are looking up basic rates and which care
about the rates themselves
* ensure the rate bitmap passed into the rate control firmware call
(which isn't enabled yet!) is capped at 28 bits so they don't
set the mode field.

Differential Revision: https://reviews.freebsd.org/D47993
Reviewed by: bz, imp

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sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

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

MFhead@r313243

Merge ^/head r312309 through r312623.

rtwn: export more stats to net80211

Setup more ieee80211_rx_stats fields for received frames:
- pktflags:
* IEEE80211_RX_F_FAIL_FCSCRC;
* IEEE80211_RX_F_AMPDU;
* IEEE80211_RX_F_AMPDU_MORE;

rtwn: export more stats to net80211

Setup more ieee80211_rx_stats fields for received frames:
- pktflags:
* IEEE80211_RX_F_FAIL_FCSCRC;
* IEEE80211_RX_F_AMPDU;
* IEEE80211_RX_F_AMPDU_MORE;
* IEEE80211_RX_F_SHORTGI;
- rate flags (CCK, OFDM, HT);
- width;
- phytype;
- rate;
- rx_tsf;
- rssi;
- nf;
- ieee, freq (RTL8188EU only, when ht40 support is disabled).

Tested with:
- RTL8188CE, RTL8188EU, RTL8821AU (STA / AP modes, i386)
- (by kevlo) RTL8188EU and RTL8812AU (amd64)

Reviewed by: adrian (previous version), kevlo
Differential Revision: https://reviews.freebsd.org/D9021

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Merge ^/head r308227 through r308490.

rtwn: fix Rx filter setup for some multi-vap configuratons.

- Correctly refresh Rx filter when AP (IBSS) vap is created after STA vap.
- Block any RCR updates during TSF correction (IBSS mode).
- Se

rtwn: fix Rx filter setup for some multi-vap configuratons.

- Correctly refresh Rx filter when AP (IBSS) vap is created after STA vap.
- Block any RCR updates during TSF correction (IBSS mode).
- Set CBSSID* bits during vap creation, not when it was started / stopped.
- Cache current state to prevent unnecessary register reads.

Tested with RTL8188CE, STA + AP mode.

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Merge ^/head r307383 through r307735.

rtwn(4), urtwn(4): merge common code, add support for 11ac devices.

All devices:
- add support for rate adaptation via ieee80211_amrr(9);
- use short preamble for transmitted frames when needed;
- m

rtwn(4), urtwn(4): merge common code, add support for 11ac devices.

All devices:
- add support for rate adaptation via ieee80211_amrr(9);
- use short preamble for transmitted frames when needed;
- multi-bss support:
* for RTL8821AU: 2 VAPs at the same time;
* other: 1 any VAP + 1 sta VAP.
RTL8188CE:
- fix IQ calibration bug (reason of significant speed degradation);
- add h/w crypto acceleration support.
USB:
- A-MPDU Tx support;
- short GI support;
Other:
- add support for RTL8812AU / RTL8821AU chipsets
(a/b/g/n only; no ac yet);
- split merged code into subparts:
* bus glue (usb/*, pci/*, rtl*/usb/*, rtl*/pci/*)
* common (if_rtwn*)
* chip-specific (rtl*/*)
- various other bugfixes.

Due to code reorganization, module names / requirements were changed too:
urtwn urtwnfw -> rtwn rtwn_usb rtwnfw
rtwn rtwnfw -> rtwn rtwn_pci rtwnfw

Tested with RTL8188CE, RTL8188CUS, RTL8188EU and RTL8821AU.

Tested by: kevlo, garga,
Peter Garshtja <peter.garshtja@ambient-md.com>,
Kevin McAleavey <kevin.mcaleavey@knosproject.com>,
Ilias-Dimitrios Vrachnis <id@vrachnis.com>,
<otacilio.neto@bsd.com.br>
Relnotes: yes

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