A couple of drivers and one place in if.c use ETH_ADDR_LEN, even though
net/ethernet.h provides an equivalent ETHER_ADDR_LEN definition.

Cleanup all of the locations which refer to ETH_ADDR_LEN to use the
standard ETHER_ADDR_LEN instead.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>

Submitted by:	Jacob Keller <jacob.e.keller@intel.com>
Reviewed by:	erj@, jpaetzel@
Sponsored by:	Intel Corporation
Differential Revision:	https://reviews.freebsd.org/D21239

PR:		241258
Reported by:	sigsys @ gmail.com
Obtained from:	github.com/andikleen/pmu-tools commit bb3c77ed61
MFC after:	3 days

This matches Linux's default arm64 data / stack permissions.

MFC after:	1 week
Sponsored by:	The FreeBSD Foundation

The exclusive lock assertion became incorrect due to changes in lock
scope in r354155.

Discussed with:	jeffr
Sponsored by:	DARPA, AFRL

  [PowerPC] Do not emit HW loop if the body contains calls to
  lrint/lround

  These two intrinsics are lowered to calls so should prevent the
  formation of CTR loops. In a subsequent patch, we will handle all
  currently known intrinsics and prevent the formation of HW loops if
  any unknown intrinsics are encountered.

  Differential revision: https://reviews.llvm.org/D68841

This should fix an "invalid CRT loop" assertion when building the
www/node port for powerpc64.

Requested by:	Alfredo Dal'Ava Júnior <alfredo.junior@eldorado.org.br>
MFC after:	1 month
X-MFC-With:	r353358

Enabling interrupts on htt cores has benefits to workloads which are primarily
interrupt driven by increasing the logical cores available for interrupt handling.
The tunable is named machdep.hyperthreading_intr_allowed

Reviewed by:	kib, jhb
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D22233

call into leaf functions that require epoch.  Since the function is already
run in non-sleepable context, it should be safe to cover it whole with epoch.

Reported by:	syzcaller

Bump the __FreeBSD_version to force recompilation of
external kernel modules due to structure change.

Differential Revision:	https://reviews.freebsd.org/D21564
Submitted by:	Greg V <greg@unrelenting.technology>
MFC after:	1 week
Sponsored by:	Mellanox Technologies

r354269:
sqlite3 is updated to sqlite3-3.30.1.

r351397:
WPA is updated from 2.8 to 2.9.

The purpose of this change is to group kernelthreads specific to a
particular ZFS pool under a kernel process.  There can be many dozens of
threads per pool.  This change improves observability of those threads.

This change consists of several subchanges:
1. illumos taskq_create_proc can now pass its process parameter to
taskqueue.  Also, use zfsproc instead of NULL for taskq_create.  Caveat:
zfsproc might not be initialized yet.  But in that case it is still NULL,
so not worse than before.

2. illumos sys/proc.h: kthread id is stored in t_did field, not t_tid.

3. zfs: enable SPA_PROCESS on the kernel side.  The change is a bit hairy
as newproc() is implemented privately to spa.c.  I couldn't think of a
better way to populate process name than to poke inside the argument for
the process routine.

4. illumos thread_create: allow assigning thread to process other than
zfsproc.

5. zfs: expose spa_proc to other users, assign sync and quiesce threads
to it.

Pool-specific threads created using (relatively new) zthr mechanism are
still assigned to the zfskern process rather than to a respective
zpool-xxx process.  I am going to address this a bit later.

Reviewed by:	no one
MFC after:	5 weeks
Relnotes:	perhaps
Differential Revision: https://reviews.freebsd.org/D9720

Add small visual aid in lsdev output.

We have a bad habit of duplicating contents of files that are sourced from
/dev/null and applied more than once... take the more sane (in most ways)
GNU route and complain if the file exists and offer reversal options.

This still falls short a little bit as selecting "don't reverse, apply
anyway" will still give you duplicated file contents. There's probably other
issues as well, but awareness is the first step to happiness.

MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D21535

tlb1_mapin_region() and pmap_mapdev_attr() do roughly the same thing -- map
a chunk of physical address space(memory or MMIO) into virtual, but do it in
differing ways.  Unify the code, settling on pmap_mapdev_attr()'s algorithm,
to simplify and unify the logic.  This fixes a bug with growing the kernel
mappings in mmu_booke_bootstrap(), where part of the mapping was not getting
done, leading to a hang when the unmapped VAs were accessed.

Some userland libraries incude machine/pcb.h and this needs the full
definition of struct debug_monitor_state. To allow this to work move
stuct debug_monitor_state out of the _KERNEL guard.

Sponsored by:	DARPA, AFRL

Apparently people are using log with boot pool, so we can not just
error out there. Still we will need to investigate how to handle
log properly.

Clean up the label read.

To be inline with intel-lpss Linux driver

They are clocked at 216MHz rate, much higher than previous models.

PR:		240485
Submitted by:	Neel Chauhan <neel@neelc.org>

That allows ig4 children to allocate IRQs

With leaving some data queued in the TX FIFO at the end of write cycle.

It gives better error detection and ig4 driver's lock coverage
in a pipelined write case

It is very helpful during debugging of I2C issues.
It is done only for SkyLakes due to lack of testing on other hardware.

if controller has not it done for us yet.

Reset controller when transfer abort is failed.

Handle error bits of INTR_STAT and TX_ABORT registers.

Move interrupt clearing from interrupt handler to polling loop to get
common execution path with polled mode.

Do not clear interrupts with reading of IG4_REG_CLR_INTR register as
interrupts, triggered during the period from reg_read(IG4_REG_INTR_STAT)
to reg_read(IG4_REG_CLR_INTR) will be missed.
Instead, read each IG4_REG_CLR_* register separately.

INTR_STAT register exposes more useful informaton then STA register does
e.g. it exposes error and I2C bus STOP conditions. Make it a main source
of I2C transfer state.

in ig4iic_read routine. It makes possible interrupt utilization while
waiting for empty space in TX FIFO.

rather than TX_NOTFULL. It makes possible interrupt utilization while
waiting for empty space in TX FIFO.

That is done with re-execution of controller initialization procedure
from resume handler.

PR:		238037

In this mode DATA_CMD register reads and writes are performed in
TX/RX FIFO-sized bursts to increase I2C bus utilization.

That reduces read time from 60us to 30us per byte when read data is fit
in to RX FIFO buffer in FAST speed mode in my setup.

IC clock rates are varied between different controller models so we have
to adjust timing registers in each case individually. Borrow intresting
constants and formulas from Intel specs, i2c-designware and lpss_intel
drivers and apply them to FreeBSD supported controller models.

Implement fetching of timing data via ACPI methods execution if available.

They appeared to be supported (although undocumented) on SkyLakes+ too.

After recent ig4 changes cyapa driver can be attached before timers
initialization is completed. Start polling thread from config_intrhook
to avoid busy loops in that case.

as the driver is fully functional on a cold boot through utilization of
polled mode.

As a side effect, ig4 children probe and attach methods can be called
earlier in the boot sequence, so now it is up to the child drivers
to wait for a kernel initialization completion if it is required.

If controller is allocated with IIC_NOWAIT option ig4 enables polled mode
for a period of allocation that makes possible to start I2C transfers
from the contexts where sleeping is not allowed e.g. from ithreads or
callouts.

Currently ig4 internally depends on it's own interrupts and uses mtx_sleep()
to wait for them. That means it can not be used from any context where
sleeping is disallowed e.g. on cold boot, from DDB/KDB, from other device
driver's interrupt handlers and so on.

This change replaces sleeps with busy loops in cold boot and DDB cases.

It is required by controller specifications.