I've submitted an alternative proposal to -core about just importing
the (converted) GPL PHY code in an alternate directory under sys/gnu/
so I don't have to rewrite it all to be BSD licenced.
N-PHY and later require a lot more plcp specific setup for the PHY
to know what to transmit. I've been spoilt by the atheros, intel
and realtek parts where you don't have to hand-assemble the PLCP
but .. well, apparently Broadcom require a lot more work.
This, and PHY-N itself, was the last major missing bit to get 11a
OFDM transmit to work. Without this, CCK transmit worked but
OFDM transmit would always fail (with stat.phy_err set to 0x80.)
I have no idea what 0x80 is, and I went mad reading the broadcom
vendor driver to try and figure it out.
Tested:
* BCM4312 (PHY-LP)
* BCM4321 (PHY-N), 11a, 11bg.
Set phy-full-init always to 1 for now; PHY-N supports being able to do
partial init for things like fast channel changes but I'm going to
ignore it all.
This is a big commit with a whole lot of little changes, all in
preparation for PHY-N and rev 5xx firmware.
* add in a write method that does an explicit flush
* change the txpwr recalc type to return an enum, versus just an int.
* add in PHY-N RX frame format bits, for decoding RX RSSI and such
* add in the header space calculation for rev 5xx firmware.
* add in a whole bunch of new types that the newer and 5g phy code
needs. Notably, broadcom has a split 5GHz band concept -
5G-Low, 5G(-Mid) and 5G-High. I kept encountering this at my
day job and wondered whether it was just some marketing thing.
Nope, turns out it isn't; it's an actual PHY thing.
* Add a "am I a siba bus device" method, that returns true.
The aim is to convert all the siba/bhnd specific bits in if_bwn
over to be wrapped in this check, so when landon does a BHND
drive through he knows which bits need updating.
Now, this the /complete/ set of changes for rev 5xx firmware.
Notably, the TX descriptor handling isn't at all done yet and the
format has changed. So don' try blindly flipping this on just yet!
* Log the per-completion status out if requested
* If we get a PHY failure, the retrycnt is set to 0 and ack=0, so
the logic was incorrect. So, for ack=0, ensure we don't log
a retrycnt of 0 (or rate control breaks) or a negative retrycnt
(or rate control also breaks.)
Tested:
* BCM4321 (11abgn N-PHY), BCM4312 (LP-PHY)
* Ensure we set 20MHz wide channels (hard-coded) for PHY-N.
* Change the core rese tto take a flag saying "gmode" vesus uint32_t
flags. This is important for BCMA support where the "gmode" bit
is different.
* Refactor out the mac-phy clock reset routine (usde by PHY-N).
Tested:
* BCM4321 (PHY-N), BCM4312 (PHY-LP)
TODO:
* Checkpoint test on PHY-G hardware, just to check.
This isn't compiled in yet; so some code here duplicates what
is in the existing code. I'll migrate it all out in subsequent
commits.
Obtained from: b43 (definitions), bcm-v4 specifications website
This will eventually live in sys/dev/bhnd/, but I won't use that until
we migrate the whole driver over.
So, this'll live here for now.
Obtained from: Linux b43 (definitions)
bwn_sqrt() is in the PHY-LP code but is also needed by the upcoming
PHY-N support.
The other two routines are used by the PHY-N code.
The next commit will introduce it into the compile and pull bwn_sqrt()
out of the PHY-LP source.
Currently, Application Processors (non-boot CPUs) are started by
MD code at SI_SUB_CPU, but they are kept waiting in a "pen" until
SI_SUB_SMP at which point they are released to run kernel threads.
SI_SUB_SMP is one of the last SYSINIT levels, so APs don't enter
the scheduler and start running threads until fairly late in the
boot.
This change moves SI_SUB_SMP up to just before software interrupt
threads are created allowing the APs to start executing kernel
threads much sooner (before any devices are probed). This allows
several initialization routines that need to perform initialization
on all CPUs to now perform that initialization in one step rather
than having to defer the AP initialization to a second SYSINIT run
at SI_SUB_SMP. It also permits all CPUs to be available for
handling interrupts before any devices are probed.
This last feature fixes a problem on with interrupt vector exhaustion.
Specifically, in the old model all device interrupts were routed
onto the boot CPU during boot. Later after the APs were released at
SI_SUB_SMP, interrupts were redistributed across all CPUs.
However, several drivers for multiqueue hardware allocate N interrupts
per CPU in the system. In a system with many CPUs, just a few drivers
doing this could exhaust the available pool of interrupt vectors on
the boot CPU as each driver was allocating N * mp_ncpu vectors on the
boot CPU. Now, drivers will allocate interrupts on their desired CPUs
during boot meaning that only N interrupts are allocated from the boot
CPU instead of N * mp_ncpu.
Some other bits of code can also be simplified as smp_started is
now true much earlier and will now always be true for these bits of
code. This removes the need to treat the single-CPU boot environment
as a special case.
As a transition aid, the new behavior is available under a new kernel
option (EARLY_AP_STARTUP). This will allow the option to be turned off
if need be during initial testing. I plan to enable this on x86 by
default in a followup commit in the next few days and to have all
platforms moved over before 11.0. Once the transition is complete,
the option will be removed along with the !EARLY_AP_STARTUP code.
These changes have only been tested on x86. Other platform maintainers
are encouraged to port their architectures over as well. The main
things to check for are any uses of smp_started in MD code that can be
simplified and SI_SUB_SMP SYSINITs in MD code that can be removed in
the EARLY_AP_STARTUP case (e.g. the interrupt shuffling).
PR: kern/199321
Reviewed by: markj, gnn, kib
Sponsored by: Netflix
Since r276367 added the virtio_mmio support vtnet_modevent() gets called twice.
This resulted in a memory leak during load and a panic on unload.
Count the loads so we only initialise once (just like cxgbe(4)), and only clean
up in the final unload.
PR: 209428
Submitted by: novel@FreeBSD.org
MFC after: 1 week
Move legacy privilege masks near to their only user.
Move Huntington definitions to the top of hunt_impl.h to prepare
for moving the remaining EF10 definitions to ef10_impl.h.
Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D6343
Falcon support has been removed, so this code only supports Siena.
Submitted by: Andy Moreton <amoreton at solarflare.com>
Sponsored by: Solarflare Communications, Inc.
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D6342
