rtwn: create a new HAL routine for enabling STA mode beacon processing

For some NICs (notably the rtl8192cu that I'm working on) the
firmware rate adaptation requires beacon processing to be enabled

rtwn: create a new HAL routine for enabling STA mode beacon processing

For some NICs (notably the rtl8192cu that I'm working on) the
firmware rate adaptation requires beacon processing to be enabled.

Instead of making assumptions in the if_rtwn beacon routines (and
honestly all of that should be in the HAL too), create a HAL method
for enabling/disabling beacon processing specifically in STA mode.

Since this isn't necessarily required for all NICs (notably the RTL8188E
NICs, where some will do firmware rate control and some will require
driver rate control), only enable it for the RTL8192CU and RT8192EU.

The RTL8188E and RTL8812/RTL8821 just have no-op routines for now.

Locally tested:

* RTL8192CU, STA mode

Differential Revision: https://reviews.freebsd.org/D48066
Reviewed by: bz

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rtwn: try enforcing net80211 regulatory / txpower limits for 11n chips

This is an attempt to reverse engineer what the actual transmit power
calculations are doing and apply net80211 limits on them.

rtwn: try enforcing net80211 regulatory / txpower limits for 11n chips

This is an attempt to reverse engineer what the actual transmit power
calculations are doing and apply net80211 limits on them. It doesn't
look as simple as just applying the check at the end - there are plenty
of places where offsets are calculated between different PHY modes and
1 / 2 antenna MCS transmit rates.

There are also some places where the offset being added is negative,
so handle the potential underflow so when things hit 0, they don't
just wrap and cause the maximum transmit power into the registers.

This is being done to aide in power/performance debugging - if there
are issues with the transmit power being wrongly calculated and are too
high, the output waveform will be distorted and it will effect performance.
Being able to drop the transmit power by a few dB here and there can
quickly identify if this is happening (because suddenly higher MCS
rates / OFDM rates suddenly work better!)

I've tested each NIC through the transmit power values from 0 dBm
to 30dBm via ifconfig (and they're all capped far before that,
normally around 20-25dBm) and they're not underflowing.

Locally tested:

* RTL8192CU, STA
* RTL8192EU, STA
* RTL8188EU, STA

Differential Revision: https://reviews.freebsd.org/D47987
Reviewed by: bz, imp

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rtwn: add APIs for setting transmit power

The RTL8188/RTL8192/RTL8821/RTL8812 NICs all seem happy to have
their transmit power changed at runtime - and it does seem to do
what's expected - the trans

rtwn: add APIs for setting transmit power

The RTL8188/RTL8192/RTL8821/RTL8812 NICs all seem happy to have
their transmit power changed at runtime - and it does seem to do
what's expected - the transmit power level does change.

So, add the API call here, even though it's all currently no-ops.
A follow-up commit will land changes for the chipsets to both
limit transmit power to the configured / regulatory limit AND
allow reconfiguration at runtime.

Differential Revision: https://reviews.freebsd.org/D47979
Reviewed by: bz, imp

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rtwn: add placeholder for the per-MACID rate report

Some chipsets (such as the RTL8188E) have firmware which supports
a second kind of TX report - instead of a per-packet TX report,
it can generate

rtwn: add placeholder for the per-MACID rate report

Some chipsets (such as the RTL8188E) have firmware which supports
a second kind of TX report - instead of a per-packet TX report,
it can generate a per-MACID summary of packet success/failure counters.

This would be helpful for those chips to cut back on the USB traffic
to get rate control feedback for the driver based rate control we're
currently using.

This is a no-op; it just gets the pieces in place for future work.

Differential Revision: https://reviews.freebsd.org/D47894

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

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

rtwn_pci(4): add support for RTL8188EE chipset.

Initially based on https://reviews.freebsd.org/D15692;
later deduplicated and improved a bit (Tx reports, IQ calibration support).

Submitted by: Farh

rtwn_pci(4): add support for RTL8188EE chipset.

Initially based on https://reviews.freebsd.org/D15692;
later deduplicated and improved a bit (Tx reports, IQ calibration support).

Submitted by: Farhan Khan <khanzf@gmail.com>
MFC after: 4 days
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D15692

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