Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

sys/dev: minor spelling fixes.

Most affect comments, very few have user-visible effects.

Replace 0 with NULL for pointers in misc. device drivers.

Found with devel/coccinelle.

In order to reduce use of M_EXT outside of the mbuf allocator and
socket-buffer implementations, introduce a return value for MCLGET()
(and m_cljget() that underlies it) to allow the caller to avoid testing
M_EXT itself. Update all callers to use the return value.

With this change, very few network device drivers remain aware of
M_EXT; the primary exceptions lie in mbuf-chain pretty printers for
debugging, and in a few cases, custom mbuf and cluster allocation
implementations.

NB: This is a difficult-to-test change as it touches many drivers for
which I don't have physical devices. Instead we've gone for intensive
review, but further post-commit review would definitely be appreciated
to spot errors where changes could not easily be made mechanically,
but were largely mechanical in nature.

Differential Revision: https://reviews.freebsd.org/D1440
Reviewed by: adrian, bz, gnn
Sponsored by: EMC / Isilon Storage Division

Update PCI drivers to no longer look at the MEMIO-enabled bit in the PCI
command register. The lazy BAR allocation code in FreeBSD sometimes
disables this bit when it detects a range conflict, and will re-enable
it on demand when a driver allocates the BAR. Thus, the bit is no longer
a reliable indication of capability, and should not be checked. This
results in the elimination of a lot of code from drivers, and also gives
the opportunity to simplify a lot of drivers to use a helper API to set
the busmaster enable bit.

This changes fixes some recent reports of disk controllers and their
associated drives/enclosures disappearing during boot.

Submitted by: jhb
Reviewed by: jfv, marius, achadd, achim
MFC after: 1 day

Use DEVMETHOD_END macro defined in sys/bus.h instead of {0, 0} sentinel on device_method_t arrays

Reviewed by: cognet
Approved by: cognet

Mechanically substitute flags from historic mbuf allocator with
malloc(9) flags in sys/dev.

Remove unused static mn_timeout.

Delete a bunch of empty mergeinfo records caused by local copies.

Move mn over. One of the last stragglers in sys/pci. There's no
module built for this hardware, so no changes needed.

Replaced the misleading uses of a historical artefact M_TRYWAIT with M_WAIT.
Removed dead code that assumed that M_TRYWAIT can return NULL; it's not true
since the advent of MBUMA.

Reviewed by: arch

There are ongoing disputes as to whether we want to switch to directly using
UMA flags M_WAITOK/M_NOWAIT for mbuf(9) allocation.

Catchup with filters

Stop embedding struct ifnet at the top of driver softcs. Instead the
struct ifnet or the layer 2 common structure it was embedded in have
been replaced with a struct ifnet pointer to be filled by a call to the
new function, if_alloc(). The layer 2 common structure is also allocated
via if_alloc() based on the interface type. It is hung off the new
struct ifnet member, if_l2com.

This change removes the size of these structures from the kernel ABI and
will allow us to better manage them as interfaces come and go.

Other changes of note:
- Struct arpcom is no longer referenced in normal interface code.
Instead the Ethernet address is accessed via the IFP2ENADDR() macro.
To enforce this ac_enaddr has been renamed to _ac_enaddr.
- The second argument to ether_ifattach is now always the mac address
from driver private storage rather than sometimes being ac_enaddr.

Reviewed by: sobomax, sam

Fix style(9) issues with __P removal.

Noticed by: bde

Return BUS_PROBE_DEFAULT instead of 0.

/* -> /*- for license, minor formatting changes

Be BURN_BRIDGES compliant.

Use NG_FREE_MSG() instead of FREE().

Switch to using C99 sparse initialisers for the type methods array.
Should make no binary difference.

Submitted by: Gleb Smirnoff <glebius@cell.sick.ru>
Reviewed by: Harti Brandt <harti@freebsd.org>
MFC after: 1 week

Convert callers to the new bus_alloc_resource_any(9) API.

Submitted by: Mark Santcroos <marks@ripe.net>
Reviewed by: imp, dfr, bde

Use PCIR_BAR(x) instead of PCIR_MAPS.

Glanced over by: imp, gibbs
Tested by: i386 LINT

Prefer new location of pci include files (which have only been in the
tree for two or more years now), except in a few places where there's
code to be compatible with older versions of FreeBSD.

Use __FBSDID().

Back out M_* changes, per decision of the TRB.

Approved by: trb

Remove M_TRYWAIT/M_WAITOK/M_WAIT. Callers should use 0.
Merge M_NOWAIT/M_DONTWAIT into a single flag M_NOWAIT.

Use %z to print size_t values.

Rename struct softc to struct mn_softc.

Repond properly to NGM_TEXT_CONFIG messages.

Fix warnings:
412: warning: long unsigned int format, unsigned int arg (arg 3)
418: warning: long unsigned int format, unsigned int arg (arg 3)
424: warning: long unsigned int format, unsigned int arg (arg 3)

Update these netgraph drivers in current so that these changes can be
MFC'ed i due time. I can't test it under current right now because
netgraph seems to do unethical things with mutexes.

musycc:
Add status per channel.
Reduce printf chattyness
Keep error counters line if_mn does.
Increase descriptor count.

if_mn:
Support experimental unframed E1 lines.

These two drivers should share more code relating to framed channelized
TDM media in general (T1/E1/E3/T3, Sonet). Anyone interested email me.

Use pci_get_revid() rather than groping around the PCI register space
using the removed compatability register names. (this broke LINT)

Part 2 of the netgraph rewrite.
This is mostly cosmetic changes, (though I caught a bug or two while
makeing them)
Reviewed by: archie@freebsd.org

Rewrite of netgraph to start getting ready for SMP.
This version is functional and is aproaching solid..
notice I said APROACHING. There are many node types I cannot test
I have tested: echo hole ppp socket vjc iface tee bpf async tty
The rest compile and "Look" right. More changes to follow.
DEBUGGING is enabled in this code to help if people have problems.

* Rename M_WAIT mbuf subsystem flag to M_TRYWAIT.
This is because calls with M_WAIT (now M_TRYWAIT) may not wait
forever when nothing is available for allocation, and may end up
returning NULL. Hopefully we now communicate more of the right thing
to developers and make it very clear that it's necessary to check whether
calls with M_(TRY)WAIT also resulted in a failed allocation.
M_TRYWAIT basically means "try harder, block if necessary, but don't
necessarily wait forever." The time spent blocking is tunable with
the kern.ipc.mbuf_wait sysctl.
M_WAIT is now deprecated but still defined for the next little while.

* Fix a typo in a comment in mbuf.h

* Fix some code that was actually passing the mbuf subsystem's M_WAIT to
malloc(). Made it pass M_WAITOK instead. If we were ever to redefine the
value of the M_WAIT flag, this could have became a big problem.

Divorce the kernel binary ABI version number from the message
format version number. (userland programs should not need to be
recompiled when the netgraph kernel internal ABI is changed.

Also fix modules that don;t handle the fact that a caller may not supply
a return message pointer. (benign at the moment because the calling code
checks, but that will change)

Make sure to check if MGET(HDR) returned NULL, even when called with M_WAIT.
This fixes the possibility of a NULL pointer dereference in the case where
there are no mbufs or mbuf clusters left.

Approved by: phk

I really hate it when part of a patch gets left out.
This was still sitting in my commit tree.
Luckily I always compare my before and after trees...

Reviewed by: Archie@freebsd.org
This clears out my outstanding netgraph changes.
There is a netgraph change of design in the offing and this is to some
extent a superset of soem of the new functionality and some of the old
functionality that may be removed.

This code works as before, but allows some new features that I want to
work with and evaluate. It is the basis for a version of netgraph
with integral locking for SMP use.

This is running on my test machine with no new problems :-)

Convert more malloc+bzero to malloc+M_ZERO.

Submitted by: josh@zipperup.org
Submitted by: Robert Drehmel <robd@gmx.net>

Remove unneeded #include <machine/clock.h>

Register resources in a more opportune order for the hardware.

Newbusify this driver at an expense of 40 extra lines of code.

Account for packets we clean out when we disconnect.

Two simple changes to the kernel internal API for netgraph modules,
to support future work in flow-control and 'packet reject/replace'
processing modes.

reviewed by: phk, archie

Remove ~25 unneeded #include <sys/conf.h>
Remove ~60 unneeded #include <sys/malloc.h>

Ahhrggg. Put the test for the compat shims AFTER the file that includes
them.

Pointed out by: bde

Allow reuse of hooks.
Remove debugging printfs.
Now compatible with ports/net/mpd-netgraph

Per conversations in -current, add #error to these drivers when you don't
have the right compatibility shims enabled. ISA drivers to follow later.

Updates for new FALC chips and other nits.

(And try to make it first post-freeze commit :-)

Fix a initialization bug.
Report xmit queue length.
Remove old magic and clean up some printfs.

'driver support' -> 'driver supports'

Implement queue-limiting based on bandwidth.

Approved by: jkh

Change #ifdef KERNEL to #ifdef _KERNEL in the public headers. "KERNEL"
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.

Removed unnecessary const poisoning (redundant casting) which was added
in rev.1.4.

Add #ifdef notyet around uncalled code that is later going to become DDB
commands.

Discussed with: phk (driver author)

Add NULL for new entrypoint.

Change the prototype of the strto* routines to make the second
parameter a char ** instead of a const char **. This make these
kernel routines consistent with the corresponding libc userland
routines.

Which is actually 'correct' is debatable, but consistency and
following the spec was deemed more important in this case.

Reviewed by (in concept): phk, bde

Do timeouts in terms of hz

Spotted by: julian

Remove compat cruft.

New driver: Nx64kbit/s E1/T1 cards based on Munich32x&Falc54.

This is a netgraph driver.